US2360500A - Metal partition - Google Patents

Description

c. E. 1'. JOHNSON Oct. 17, 194

METAL PARTIT ION Filed 1941 8 Sheets-Sheet 1 m 012. L'arZ 1 Z'Jalmsan ATTORNEY$ I Oct. 17, 1944. c. E. r. JOHNSON 2,360,500

METAL PARTITION Filed Aug. 26, 1941 8 Sheets-Sheet 2 IN VENTOI Q. far/15f TIM/1mm 6 ATTORNEYS Ot. 17, 1944. c. E. "r. JOHNSON METAL PARTITION Filed Aug. 26, 1941 8 Sheets-Sheet 3 C. E. T. JOHNSON METAL PARTITION Filed Aug. 26, 1941 oct; 17, 1944.

' 8 Sheets-Sheet 4 mbzw ATTORNEYS Oct. 17, 1944.

c. E. T. JOHNSON METAL PARTITION Filed Aug. 26, 1941 8 Sheets-Sheet 5 INVENTOR. flf'lbizn flm W 1 ATTORNEY3 Kari Oct. 17, 1944. c. E'. r. JOHNSON METAL PARTITION Filed Aug. 26, 1941 8 Sheets-Sheet 6 INVENTOR. tar/ E 71011115011 ATTOR N E Y5 Oct. 17, 1944. c. E. T. JOHNSON METAL PARTITION Filed Aug. 26, 1941 8 Sheets-Sheet 7 INVENTOR Zi/afinsan ATTORNEYS Patented Oct. 17, 1944 UNITED STATES PAT ENT OFFICE METAL PARTITION Carl E. '1. Johnson, Jamestown. N. Y., assignor to Jamestown Steel Partitions, Inc., Jamestown, N. Y., a corporation of New York Application August 26, 1941, Serial Nb. 408,377 19 Claims. (01. 189-34) This invention relates to metal, partitions which may be set up in separately erectable sections or units to divide space in buildings.

In accordance with this invention, the partition is constructed from separately erectable panel units of novel construction which present substantially flush wall surfaces. The panel unit is formed from spaced metal sheets whose vertical edges are joined to vertical uprights. Means are provided for spreading the vertical uprights forming the panel unit apart so as to place a predetermined drumhead stretch or tension on the wall-forming facing sheets so as to. remove from the facing sheets waves, undulations and surface irregularities so that an' absolutely flat and flush wall surface is produced. To prevent inward buckling of the facing sheets and to reinforce and stiffen the same, a plurality of struts extend horizontally between the uprights. The ends of the struts are rather loosely connected to the uprights. of the unit so that the uprights to the panel unit connecting clips. The post caps may be designed to present outside surfaces substantially flush with the outside surfaces of the adjacent panel units or, if desired, the post caps may be shaped to present vertical edges which overlap the adjacent vertical edges of the panel units.

A metal baseboard extends along each side of the panel units adjacent the lower end thereof and is removably attachedto the panel unit by means of clips slidably engaging the adjacent flange of a wire and conduit receiving tray which is readily accessible upon removal of the baseboard. The baseboards may be of such length as to extend along the bottom of a plurality of panel units so as to present a substantially flush base molding throughout. Where plinths are to be used each baseboard may be of such length can be spread apart a suflicient amount to place drumhead tension on the facing sheets. The horizontally extending struts may be formed channel-shaped in cross-section with the flanges so placed. as to abut the inside surfaces of the facing sheets without causing distortion of'the facing sheet. These flanges thus provide a rigid backing for the facing sheets which positively prevents rattling ofthe facing sheets when drummed upon. The inside surface of the facing sheets may be covered by a suitable sound deadening coating or sheeting and the space between the facing sheets may be packed with a suitable filler formed from some sound deadening material which is preferably non-heat conducting and fire resistant.

In one form of the invention post structures may be positioned between the vertical edges of adjacent panel units. Each post structure may be provided with a removable post cap positioned on one or both sides thereof and removably secured to the post structure by resilient clip elements. The post caps may be designed to overlap the adjacent panel units to retain them in erect position between the post structures. building floor by suitable floor securing means and to the cornice which extends over the panel units and post structures.

In another form of the invention the panel units may be connected together at their vertical edges by spaced clips without the use of an intervening post structure. In this type of construction the post caps are removably attached Each post structure is secured to the that it extends substantially only the width of the panel unit and the plinths may be positioned to overlap the adjacent ends of the baseboard. The plinths may be provided with U-shaped straps welded thereto which removably engage tongues struck out from the lower end of the adjacent post caps.

Apertures may be provided in the panel unit uprights through which wiring and other conduits may be threaded from one panel unit to the other or into the space provided between the vertical edges of adjacent panel units. Where a post structure is provided between ad jacent panel units, the post structures would also be provided with apertures which align with the apertures in the panel unit uprights and panel unit trays so that the wiring or conduits may be strung-through the posts or into the posts. The wire and conduit receiving trays are readily accessible upon removal of the baseboards.

The panel units extend from the building floor to the cornice and may be constructed to present substantially flush wall surfaces throughout their length and width. The panel units may also be constructed to provide glazed sections which are formed by placing a glass receiving frame above a lower packed section constructed substantially similar to the comice-high panel units.

When the partition is to be equipped with entrance doors, door frames are provided which may be inserted between and secured to adjacent panel units or adjacent post structures. The doorframes are secured to the post structure by adjustable means which permits both vertical and horizontal adjustment of the door frame to properly center the same and square.

the door frame so that it conforms to the edges of the door.

An object of this invention is to provide an improved metal partition composed of panel units formed of spaced metal facing sheets which present substantially flush wall surfaces and equipped with means for placing a drumhead tension on the panel forming facing sheets to remove waves, undulations and surface irregularities therefrom.

Another object of this invention is to provide tions which is connected to the lower ends of the panel unit in a manner to permit quick removal and attachment thereof so as to give ready access to a wire and conduit receiving tray forming a part of the panel unit.

Another object of this invention is to provide improved means for attaching plinth blocks to a; partition assembly.

Another object of this invention is to provide an improved glazing frame for metal partitions which can be quickly mounted upon a panel unit section positioned therebelow.

Another object of this invention is to provide an improved door frame assembly having means associated therewith for adjustably securing and squaring the door frame in the partition wall.

A further object of this invention is to provide an improved metal partition comprising a plurality of separately erectable and removable panel units which are economical to manufacture, fully insulated against passage of sound, and which present flush wall surfaces free fromsurface waves, undulations and irregularities, and which are braced and reinforced to present firm, rigid and vibrationless wall surfaces.

Other objects and advantages will become apparent as the disclosure proceeds.

Various other features and advantages of the invention will be apparent from the following particular description and from an inspection of the accompanying drawings.

Although the novel features which are believed to be characteristic of this invention will be particularly pointed out in the claims appended hereto, the invention itself, as to its objects and advantages, and the manner in which it may be carried out, may be better understood by referring to the following description taken in connection with the accompanying drawings forming a part thereof, in which i Fig. 1 is a front elevational view of a post type partition equipped with my improved panel units;

Fig. 2 is an enlarged fragmentary elevational view of the partition shown in Fig. 1, this view showing certain parts broken away to illustrate structural features of the panel units and partition post positioned between the panel units;

Fig. 3 is an enlarged horizontal cross-sectional view taken through the wall channel, panel unit and post, to illustrate further structural details thereof, this view being taken along line 3-3 of Fi 1;

Fig. 4 is an enlarged vertical cross-sectional view through the lower portion of the panel unit and base structure as it appears when looking in the direction of the arrows 4-4 of Figs. 1 and 3;

Fig. 5 is an enlarged'vertical cross-sectional view through the partition as it appears when looking in the direction of the arrows 55 of Figs. 1 and 3;

Fig. 6 is an enlarged end view through the lower portion of the panel unit and associated baseboards as they appear when looking in the direction of the arrows G6 of Figs. 1 and 3 Fig. '7 is an elevational view of the improved panel unit which extends from the'fioor to the cornice, certain parts being broken away to illustrate structural details;

Fig. 8 is an enlarged perspective view of the lower portion of the panel unit with certain parts broken away to illustrate structural details;

Fig. 9 is a perspective view-of the plinth which is attached to the lower end of each post cover;

Fig. 10 is an enlarged fragmentary vertical cross-sectional view taken through the cornice and the upper portion of the partition panel as these parts appear when looking in the direction of the arrows llll 0 of Fig. 1;

Fig. 11 is an enlarged vertical cross-sectional view through a portion of the cornice and a partition panel having the upper section thereof equipped with glass framing, as the same appears when looking in the direction of arrows ll-ll of Fig. 1;

Fig. 12 is an enlarged vertical cross-sectional view through the cornice. door frame and the upper portion of the door, as the same appears when looking in the direction of the arrows l2l2 of Fig. 1; Fig. 13 is an enlarged horizontal cross-sectional view through the partition as the same appears when looking in the direction of the arrows Iii-ll of Fig, 1;

Fig. 14 is an enlarged vertical cross-sectional view taken longitudinally through the upper portion of the partition illustrating the means by which the cornice is secured to the upper end of the post, as the same appears when looking in the direction of the arrows -44 of Fig. 10;

Fig. 15 is an enlarged fragmentary elevational view of a portion of the post and the adjacent portion of the partition panel equipped with glass framing, certain parts being broken away to illus-' trate structural details.

Fig. 16 is a horizontal cross-sectional view through a sectional type partition built up from my improved panel units connected by spaced connecting clips without the use of an intervening post structure and with the space between adjacent panel units covered by removable post caps;

Fig. 17 is a fragmentary elevational view'of the sectional type partition shown in Fig. 16 with certain parts broken away to illustrate structural details; I i

Fig. 18 is a fragmentary cross-sectional view of another type of postless sectional partition built up from my improved panel units connected together by spaced clips, with the space between the panel units covered by a post cap whose outer surface is substantially flush with the adjacent facing surfaces of the panel units;

, i is designated a.

. wall-forming facing resilient lip portion Fig. 19 is a fragmentary horizontal cross-sectional view through the sectional type partition shown in Fig. 18, illustrating the manner in which my improved panel units may be connected to provide a right-angled partition run;

Fig. is a fragmentary horizontal cross-sectional view of the sectional type partition shown in Fig. 18, illustrating the manner in which my improved panel units may be connected to form a T-shaped partition run.

Similar reference characters refer to similar parts throughout the several views of the drawlugs and the specification.

The partition assembly constructed in. accordance with this invention generally comprises a series of panel units of the desired height and width which may extend from the floor to the cornice or to the ceiling, as desired. The partition panels designated a are shown as extending from the floor to the cornice c and present flush facing able intervals from the surfaces throughout their length. The partition panels may also be constructed to receive glass in their upper section with the lower section thereof presenting flat wall surfaces, which type of panel Baseboards I extend along each panel unit and are removably secured thereto. Plinths g are also provided which are secured to the lower end of each post cap. Where the partition is to abut against a building wall, a wall channel It may be provided which is secured to the wall and is constructed to receive the vertical edge of the adjacent panel unit.

In the post type partition, as shown in Figs. 1

to 5 inclusive, the partition posts b are arranged between the spaced panel units and have their lower ends fastened to the building floor and their upper ends fastened to the cornice c which extends over the posts and panel units. Each post is provided with a removable face cover which snaps onto the post structure and overlaps the adjacent panel units, thus retaining the panel units in assembled position. The partition may be provided with a suitable door d fitting within a door frame e fixed to the adjacent posts b. In the post type partition, each partition post b, as illustrated more particularly in Figs. 2, 3, 5 and 13, comprises a built-up structure comprising a pair of spaced channel members I secured together in rigid assembly by paired channel-shaped spacers 2 which extend transversely between the main channel members I. Each channel spacer 2 may .be made only a few inches in length and arranged in vertical spaced relationship. Each channel spacer-2 has an outturned flange 3 at each end thereof which seats against the inside face of the adjacent main channel I and are secured thereto as by spot welding 4. While a series of vertically spaced channel spacers 2, properly secured as by welding to the main channels I, produce apost structure of ample strength, it will be appreciated that the channel spacers 2 may be formed so as to extend the full height of the post, if desired.

A sheet metal post cap I) is removably secured to each exposed side of the post structure. Each post cap b extendssubstantially the full height of the post and comprises a flat wall-forming facing portion 5 each of whose vertical edges terminates in a rebent portion 6 which may lie substantially flat against the inside face of the tions 6 each terminate in an inturned relatively I which is so shaped as to spring over-the adjacent inturned flanges 9 of portion 5. The rebent por-- ture b. The lower end of each the main channels I of the post and which terminates in a flared free edge 8 to facilitate snapping attachment of the post cover I) to the post strucpost b is secured to the building floor and its upper end is secured to the cornice c in a manner which will be described more particularly hereinafter.

An important feature of this invention is the construction of the panel units. The structural details of panel unit a are illustrated more particularly in Figs. 2 to 8 inclusive. Panel unit 41 comprises more particularly a pair of spaced channel uprights I0 each having outturned flanges II. The upright channels III are maintainedin spaced parallel relationship by a plurality of channel-shaped horizontally extending struts I2, l2 and I2, which are spaced at suitbottom to the top of the panel unit. The lower-most strut I2 is positioned adjacent the lower end of the channel uprights II! with the web portion thereof positioned horizontally and extending between the channel uprights Ill. The channel strut I2 is provided with downturned flanges I3 which may be provided with end portions I3a which overlap the outside faces of the adjacent flanges I I of the channel uprights I0 and are suitably secured thereto as by welding lib. The channel strut I2 immediately above the lowermost channel strut I2 is also provided with downturned flanges I3 whose outside faces are substantially flush with the outside faces of the adjacent flanges II of the channel uprights III. The space between the channel struts I2 and I2 provides a tunnel in which wiring and other conduits may be placed. The series of spaced channel struts I2 arranged above the channel strut I2 are also provided with flanges I3" whose outside faces are slightly inset with respect to the outside faces of the adjacent flanges II of the channel uprights I II for a purpose that will presently appear.

The strut forming channels I 2' and I2" are A wall-forming metal facing sheet I8 is posi-' tioned on each side of the channel uprights and is supported by the flanges uprights III to form the exterior wall surface of the panel unit. Each facing sheet I6 has a rebent vertical edge portion II which is bent around and overlaps the inside face of the adated that when the facing sheets I6 have thus been applied, the spaced channel uprights I0 of the panel unit are prevented from separating outwardly and that each facing sheet I6 thus acts as a tension member.

Means are provided for driving the paired structural channels III outwardly so as to place a predetermined tension on the facing sheets I6 against the web por-- tion of each channel upright Ill. One end of each bar 2| is provided with a reduced end portion 22 which extends through a corresponding hole 30 in the adjacent abutment plate 20. Each bar 2| is provided with a shoulder 23 which seats against the abutment plate 20. The other end 'of each bar 2| carries a specially constructed screw bolt 24 which is threaded into a threaded socket 25 extending into the other end of the bar 2|. The screw bolt 24 is provided with a shoulder portion 26 which seats against the inside face of the adjacent abutment plate 20. A stud portion 21 projects from the collar portion 26 through the receiving hole 30 in the abutment plate 20 and terminates in a head portion 28 to which a wrench may be applied. By manipulating the head 28 of screw bolt 24 the channel uprights 10 can be spread apart so as to drive the flanges ll thereof into the vertical pockets formed by the rebent edge portions ll of the facing sheets It so as to stretch each of the facing sheets IE to the point where all waves and undulations are removed from the facing surface thereof, thus producing a panel unit presenting truly level facing surfaces.

To deaden sound and to further reinforce the panel sheets l6, it is desirable to apply a covering material to the inside surface of each of the sheets IS. The covering material 3| may comprise suitable sound deadening and heat resisting sheet material, such as fibrous or asbestos sheets, which are suitably cemented to the insidesurface of the facing sheets IE or the insulating sheeting may be formed on the facing sheets l6 by spraying a plastic compound containing asbestos flber to the facing sheets I6, which is of such a character that it will harden and solidify after application. The insulating layer 3| may be applied so as to extend only between the web portions of the channel uprights In as shown in Fig. 3 and above the channel strut l2 as shown in Fig 4. Since this insulating material is of substantial thickness the flanges l3" of the channel struts l2" may be sufficiently inset from the flanges ll of the structural channels ID as to make room for the added thickness of the insulating layer, but the flanges l3" should nevertheless abut the inside face of insulating layer 3| when the facing sheet is level and flush. It will also be noted by referring to Fig. 4 that the inside face of each facing sheet I6 abuts the adjacent flange I3 of channel strut l2. The lower end of each facing sheet l6 does not extend appreciably below the flanges I3 of channel strut l2.

It will now be noted that the bars 2| and associated screw bolts provide means for placing a drumhead tension on the facing sheets so that the sheets are maintained smooth and level and that the flanges l3 of strut l2 and flanges l3" of struts, l2 provide a backing abutment for the facing. sheets which prevents inward buckling thereof. Each panel unit may be equipped with any desired number of channel struts l2 and I2" and spreader bars 2|. .In actual practice it has been found that the channel struts I2" should be spaced approximately one foot apart while the tensioning bars 2| may be spaced approximately two feet apart. However, these spacing distances may be varied the width and height of the panel may require.

As shown more particularly in Figs. 3, 4 and 7, the space between the spaced channel struts l2 and i2" is preferably filled with a suitable sound deadening packing material, such as asbestos flber or rock wool. The sound deadening packing material may be formed into a suitably shaped pad 32 wrapped in a wrapper 32' so as to facilitate the insertion of the pads between the spaced channel struts.

The lower end of each of the channel uprights l0 may be provided with an opening 33 cut in the web portion thereof, through which wiring and other conduits may be threaded. Since cut ting of the openings 33 in the lower end of the channel uprights has a tendency to weaken the same, it is desirable to provide a'stiflening member 34 at the lower end of each upright which extends from the lower end thereof to some distance above the opening 33. As shown more particularly in Figs. 2, 3, 6 and 8, the reinforcing member 34 may be of channel-shaped crosssection provided with intumed flanges 35 which seat within and between the flanges H of the channel uprights Ill. The flanges 35 ofthe reinforcing member 34 may be secured as by welding 36 to the flanges H and a portion 31 of the flanges 35 may be offset sufficiently to permit the rebent edges ll of the facing sheets Hi to slide between the offset portion 31 of the flanges 35 v the adjacent opening 33 inthe channel upright III,

as shown more particularly in Figs. 2 and 8.

A channel-shaped tray member 40 extends between the channel uprights l0 and is supported upon the web portion of the lower channel strut l2 and is arranged to receive wiring and conduits threaded through the aligned. openings 33 and 39. The channel-shaped wire-receiving tray 40 is somewhat wider than the channel-shaped strut l2 and is provided with upturned flanges 4| to which the baseboards f are attached in a manner hereinafter described. The tray 40 may be provided with a vertically extending dividing wall 42 positioned approximately centrally of the tray 40, which dividing wall may be provided with a foot portion 43 which may be welded to the bottom or web portion of the tray 40. The dividing Wall 42 is so positioned that wiring and conduits can be positioned on each side thereof and run through the openings 33 in the channel uprights l0 andthe openings 39 in the reinforcing members 34. The vertical channels I for the post structure 17 may also be provided with wire and conduit openings 44 which align with openings 33 and 39 so as to permit wiring in the trays 40 to be strung through the center of the post structure b.

The lower end 45 of each facing sheet Ii terminatesin an outturned end portion 46 spaced some distance from the tray 40, as shown more particularly in Figs. 4 and 6. A flange portion 41 extends upwardly from the end portion 46 and terminates in an outwardly flared lip portion 48. Thus the lower end 45 of the facing sheet l6 and the flange portion 41 spaced therefrom define a. pocket 49 therebetween which provides means for removably securing the metal baseboards I in position.

of the tray member 49. Each clip comprises a foot portion 54 which may be welded to the inside surface of the facing portion 59 of the baseboard and an offset portion 55 which provides a pocket 56 shaped to snugly receive the upturned flange 4| of the tray member 49. The offset portion 55 of each clip may be provided with a flared end 51 to facilitate entry of the tray flange silient clip portion 98 is provided with a flared lip 96a to permit the foot portion 99 of the molding strip 9| to be easily slid under the resilient clip portion 95.

A pair of vertical spaced molding rails 96 are secured at the lower end thereof to the ends of the lower horizontal molding rail 85, these parts 9| in the pocket 56. The lower end of the facing portion 59 of the baseboard terminates in an inturned foot portion. 53 designed to seat against the building floor. The baseboards ,f are applied by sliding the same downwardly adjacent the facing sheet I6 to the point where the flange portion 52 of the baseboard seats within the pocket 49, the upturned flange 4| of the tray 49 telescopes into the clip pocket 56, and the inturned foot portion 53 seats against the building floor. The length of each baseboard f is such as to extend between the vertical edges of the post caps b, as shown more particularly in Fi 3.

The lower flush wall section of the glazed panel unit a may be constructed similar to the full height panel unit a except that it is of lesser height. Referring more particularly to Figs. 1,

l1, l3 and 15, the lower packed section of glazed panel unit a has its upper edge so formed as to provide a seat for the glazing frame. As shown in Fig. 11, the upper ends of the facing sheet I6 are each bent inwardly to provide complementary shoulder portion 89 and 8|, which terminate in upturned abutting lip portions 82 and 83 secured together as by spot welding 84. The upturned lip portions 82 and 83 are oifset from the medial line extending through the lower packed section so as to provide an abutment for rail 85 seating thereagainst.

The glazing rail 85 presents a decorative moldthe lower glazing ing portion 86 which seats against the shoulder portion 8| of the lower section. The glazing rail 85 is provided with a downturned wall portion 81 which provide a shoulder against which the glazing sheet I99 seats. The lower end of the vertical wall portion 81 terminates in a horizon tally extending foot portion 88 which seats against the shoulder portion 89 of the lower section. As shown more particularly in Figs. 11 and 15, the foot portion 88 is provided with a depressed blister 89 which seats within a complementary depressed blister 99 formed in the shoulder portion 89. The complementary blisters 89 and 99 serve to retain the glazed's'ection in seating position upon the upper end of the lower flush section.

A molding strip 9|, removably secured to glazing rail 85, has a molding portion 92 complementary to the molding portion 86 of the glazing rail 85 and is designed to seat against the opposite face of the glazing sheet I99. Molding strip 9| is provided with a downturned lip 93 which seats against the glazing sheet I99 and an inturned foot portion 94 designed to seat upon the shoulder portion 89, and is retained in position by a resilient clip portion 95 which forms an extension of foot portion 88 of glazing rail 85. Re-

being welded together to form a neat mitered joint. Molding rails 96 are each provided with a depressed groove 91 into which the vertical edges of the glazing sheet I99 extend, and are also providedwith facing flanges 98 whose outside faces align with the outside faces of the facing sheets I6 of the lower packed section. The facing flanges 98 are so constructed.

98 may be stiffened and reinforced by inturned lips 99 formed thereon.

The upper horizontal glazing rail |9| is provided with a vertical wall portion I92 against which the upper horizontal edge of the glazing sheet I99 may seat. Extending horizontally from the vertical wall I92 is a relatively flat wall I93. Glazingrail MI is provided with upturned facing flanges I94 which extend into a recess I95 provided in the cornice c, the facing flanges I94 being substantially flush with the facing flanges 98 of the vertical glazing rails 96. The upper horizontally extending glazing .rail MI is secured at its ends as by welding to the upper ends of vertical glazing rails 98 and they are joined in a manner to form a smooth mitered joint. The facing flanges I94 may also terminate in inturned lip portions I96 to reinforce and stiffen the glazing rails |9I A molding strip I91, .which may be made similar in all respects to the lower horizontally extending molding strip 9|, is provided with an inturned lip portion I99 designed to seat against the glazing sheet I99 and an inturned foot portion I99 adapted to seat under and be resiliently gripped by a plurality of spaced resilient clip elements 9 struck out from the flat portion I 93 of the glazing rail I9I.

It will be appreciated that the glazing frame, comprising the lower horizontally extending glazing rail and the upper horizontally extending glazing rail MI, is connected-to the ends of the vertical glazing rails 96 as by welding to form a rigid frame, and after erection of the lower flush section of the panel unit a, the glazing frame is placed thereon. The lower horizontally extending glazing rail 85 is centered on the upper end of the lower section by the complementary blisters 99 and 99, the upper horizontally extending rail I 9| is held in position by the recess I in the cornice c, and thevertically extending glazing rail 96 are held in position by the overlapping post caps b. Either before or after erection of the lower packed section, the glazing sheet I99 is placed in the glazing frame by inserting one vertical edge of the glazing sheetin the groove 91 of one vertical glazing rail 96 until the other vertical edge of the glazing sheet I99 can be inserted in the groove 9|.of the other vertical glazing rail 96. The glazing sheet I99 is then moved horizontally in the opposite direction until the vertical edges of the glazing sheet I99 are properly centered in both spaced grooves 91. The lower molding strip 9| and the upper molding strip I91 are then applied to the lower and upper rails 85 and 9|. Glazing putty or other suitable glazing plastic III is applied to the vertical grooves 91 and the grooves formed in the upper and lower horizontal glazing rail before, during, or after the that the,vertical edges of the post caps 11 seat thereagainst, and the flanges portion 60 are provided with ribs 62 which seat snugly against the building wall w and laterally extending flanges 63 having rebent edge portions 64 between which the vertical edge of the panel unit a is adapted to telescope.

A neat and attractive partition-to-wall connection is thus provided.

The lower ends of the post caps b are each covered by a removable plinth g constructed as illustrated more particularly in Figs. 1, 3, 5 and -9. Each plinth comprises a facing portion 12 having inturned vertical flanges I3 whose free edges neatly seat against the facing portion 50 of the adjacent baseboard f. The upper ends of the flanges I3 are provided with an overhanging portion I4 which snugly seats over the shoulder portion 5| of the adjacent baseboard f. A horizontally extending flange portion I5 is contoured to snugly fit the outer contour of the post cap 11'.

The plinth is ecured to the adjacent post cap b by means of a pair of U-shaped straps I6 welded to the inside surface of the facing portion I2 of the plinth. A pair of verticallyspaced tongues 11 are struck out from the lower end of the facing portion 5 of the post cap b, which tongues 11 have outwardly flared ends 18, so that the straps I6 may be telescoped behind the tongues 11. The lower horizontal edge of the plinth block 9 may be provided with an inturned lip portion I 9 which seats against the building floor.

The cornice structure which extends over the various panel units may be formed from stamped sheet metal parts. The cornice comprises generally a pair of complementary molding members H5, as shown more particularly in Figs. 1, 10, 11. 12 and 14, which present attractive exposed molding surfaces. Each molding member H is provided with an inturned shoulder portion H6 at the lower edge thereof which terminates in an upwardly extending wall portion I" which terminates in an inwardly extending flange portion II8. A spacing plate II9 extends the full length of the cornice between the molding members H5 and rests upon and is secured to the inturned flange portions I I8 as by spot weld I20. Thus the vertically extend ng wall portions III and the horizontally extending spacing plate II9 form a recess I05 into which the upper ends of the panel units extend. The upper horizontal edges of the molding members II5 are each provided with an inturned shoulder portion I2I terminating in a depressed flange In the post: type partition, a vertical post b is positioned between adjacent panel units and is secured to the building floor by means of a suitable floor bolt 65, shown-more particularly in Figs. 3 and 5, which may be of the lug or expansion bolt type. The upper threaded end 66 of the floor bolt 65 extends through an opening provided in a sturdy metal strap 61 which extends between the paired channel uprights I of the post structure b. The ends of the strap member 61 are provided with downturned flanges 68 which abut and are welded to the web portions of the-channel uprights I. The lower end of the post structure b is designed to rest on one or more flat leveling shims 69 which rest upon the building floor. Each shim plate 69 is provided with an aperture I0 through which the floor bolt 65 extends. and where a plurality of stacked shim plates 63 are provided, the apertures I0 in the shims are arranged in alignment.

The threaded end 66 of the floor bolt I0 is provided with a threaded nut II which may be tightened to secure the post structure b in rigid vertically erect position.

The upper end of each partition post seats within the cornice recess I05 and is firmly secured to the cornice. As shown more particularly in Figs. 10, 11 and 14, it will be noted that a vertically extending lug plate I30 is welded to the web portion of each of the vertical uprights I which form the post structure b. Each lug plate projects through a slit I3I cut in the spacing plate II9 of the cornice and through an aligned slit I32 cut through the web portion I33 of a channel-shaped stiffener I34 which seats within the cornice and restsupon and may be welded to the spacing plate H3. The channel-shaped stiffener I34 is provided with vertically extending stiffening flanges I35 to stiffen and strengthen the construction.- The channelshaped stiffener I34 may be relatively short and extend only a short distance beyond the lug plates I30, as shown in Fig. 14. Each of the lug plates I30 is provided with a vertically extendportion I22 upon-which a cornice cover plate I23 may seat. The cornice cover plate I23 may be secured to the depressed flange portions I22 by means of suitable metal screws I24. The cornice cover plate I23 may be provided with a depressed groove I25 within which the vertical uprights I26 of a ceiling flller may be positioned. The ceiling filler extends between the cover plate I23 and the building ceiling, and the vertical frame member I26 thereof may be covered with a suitable plasterboard I2'I or other wall-forming material.

ing slot I36 into which a wedge-shaped key I3'I may be driven to firmly secure the cornice to the post structure b. The web portion I33 01' the channel stiffener I34 may be provided with a hole or opening I38 which aligns with a hole or opening I39 in the stiffener plate H9. The holes I33 and I39 are centrally positioned over the end of the post structure b so that wiring and other conduits positioned within the post structure b may also be strung through the'cornice 0.

Where the partition is provided with a door d, a door frame e is secured to a pair of prope y spaced adjacent post structures b, as shown more particularly in Figs. 1, 12 and 13. The door frame e comprises a pair of vertically extending framing members and an upper horizontally extending framing member connected by mitered joints and welded together at the joints. Each framing member is a built-up section comprising a heavy channel-shaped member I40 having a web portion HI and flange portions I42. A door facing member I43 is provided with a flat door edge portion I 44 and a facing flange I46 which seats against the outside face of one of the flanges I42 of the stiffening channel I40, the flange I45 terminating in an inturned lip portion I46 which seats against and may be welded to the outside face of the web portion I4I of the stiflening channel 0. The other end of the facing portion I44 terminates in" a flange I" which is welded tothe inside surface of a facing portion I48 forming a part of a sheet metal abutment member I48. The facing portion I48 of the abutment member I 46 also seats against the adjacent flange I42 of the stiffening channel I40 and is complementary to the facing flange I 5 of the member M4. The facing portion I40 may also be provided with an intumed lip I50 which is welded to the web portion I of the stiffening channel I40. The abutment member I48 is provided with' an attractively shaped abutment flange I5I which terminates in a lip portion I52 spaced from the facing portion I44 of the facing member I43, the lip portion I52 being so shaped as to retain a resilient cushioning member I53 against which the edge of the door may seat.

In the post type partition, the vertical framing members constructed as above described may each be positioned adjacent a post structure b with the intumed lip portions I46 and I50 thereof seating againstthe outside face of the adjacent channel upright I of the post structure.

'The facing portions I45 and I48 of the frame through a suitable aperture I51 provided in the web portion I of the stiffening channel I40. To hold the bolts I55 in position, a relatively thin nut washer I51 may be threaded on or welded to the shank I58 thereof adjacent; the outside face of the web portion I of the stiffening channel I40 to retain the boltsin fixed position. In erecting the door frame each bolt shank I55 is inserted into elongated slot I59 cut in the web portion of the adjacent upright I which forms a part of the post structure, and the vertical framing members are firmly secured to the post structure by applying and tightening nuts I50a threaded onto the shanks I55 of the bolts I55.

The upper horizontally extending framing member of the door frame, as shown in Fig. 12, is shaped and constructed similar to the vertically extending framing members just described and therefore need not be further described. It will be noted, however, that the horizontally extending door frame member snugly seats within the recess I05 of the cornice c, and, if desired, web portion I4I of the stiffening channel I40 may be secured to the spacing plate I I9 of the cornice by similar bolts I55 whose shank portions I55 are inserted into slots I6Ia cut in the spacing plate H9.

The door d may be of any desired construction and forms no part of this invention. The door d is supported upon suitable hinges I52a secured to the door and to the facing portion I 44 of the adjacent vertical door framing member, and the other edge of the door may be provided with a suitable'latch or look I53a which engages a suitable lock plate secured to the facing portion I44 of the adjacent vertical door framing member.

My improved panel units are not limited for use in connection with post type partitions but may be used to advantage in the construction of sectional postless type partitions wherein the panel units are joined by spaced connecting clips with the space therebetween covered by post caps removably secured in position. 'My im proved panel units may be used in the construcpanel unit.

' clips I10 are then driven tion of almost any type of sectional type partition. I have shown in Figs. for purposes of illustration, two types of sectional partitions formed and constructed from my improved panel units.

Referring more particularly to Figs. 16 and 1'7, the panel units a maybe constructed substantially the same as the panel units illustrated in Figs. 7 and 8 and heretofore described, except that a vertical half post I50 is applied to each vertical edge of the panel unit a. after the panel units have been constructed and assembled. Each half post I50 is formed from sheet metal of suitable gauge and comprises a web portion I5I provided with ofiset shoulder portion I52. Web portion I6I terminates in a pair of flange portions I 63 each having a rebent edge I64 which overlaps the adjacent facing sheet I5 of the The half posts I60 are secured to the vertical edges of the panel units in a suitable manner, as by bolts extending between the half posts and the adjacent vertical upright I0 of the panel unit. If desired,- these bolts may be formed as extensions I55 and I55 of expansion members 2|. As shown more particularly in-Fig. 16, extension I55 extends from the end 32 of expansion member 2| and is provided with a threaded end to receive the 'nut I519 Similarly, the headed end 28 is provided with extension I65 which is threaded to receive the nut I88.

In this construction panel unit a is completely assembled and drumhead tension is placed on the sheets I5 by manipulating the head 20 of the expansion stud 24, which can be done .without interference; Each half post I50 is then telescoped over the vertical edges of the facing sheets I6 and the threaded ends of extensions I65 and I56 insertedthrough the bolt holes provided in the half post. Nuts I51 and I58 are then applied and the half posts securely clamped to the vertical edges ofthe panel unit, which can be easily done without disturbing the drumhcad stretch applied to the facing sheets I6 of the half posts I50.

The panel units a equipped with the half posts I50 are then erected into position with the lower ends thereof suitably secured to the building floor. The half posts I60 of adjacent panel units are connected together by suitable metal clips I10 which are provided with dogs- I which are inserted through vertical slots I12 cut in the shoulder portions I62 of the half posts. The down so that the dogs "I will firmly grip the adjacent half posts I80. The clips I10 are also provided with rolled edges I13 which are so shaped that the intumed edges I14 of the post cap I I5 may be sprung thereover so as to removably secure the post cap I15 in position.

Where the panel units are arranged to form a T-run, as shown in Figs. 16 and 17; the half posts J60 of the panel units which form the branch run are connected to adjacent half posts of the straight run panel units by suitable wedge blocks I15 provided with dogs inserted into vertical slots I12 of the half posts. The wedge blocks are then driven down so that the dogs will securely grip the half posts. It will be appreciated that the panel units may. be connected together to form a sectional type partition by various and sundry types of clip securing means other than those illustrated. r

The panel units a equipped with half posts I60 may extend from the floor to the ceiling or from the floor to the cornice c, in which event 16 to 20 inclusive,-

the upper ends of'the panel units extend into cornice recess I in the manner heretofore described. The half posts I60 of the panel units may be adjustably secured to the building floor in any suitable manner and, if desired, the half posts I60 may be secured to the cornice by welding lug plates I30 which are secured to the cornice by the wedge pins I36 in the manner heretofore described. It will be appreciated that the half posts I60 may also be secured to the cornice by suitable bolts or other securing means.

In event my improved panel units are to be used to form a sectional partition in which the post caps are substantially flush with the facing surfaces I6 of the panel units, each of the panel units a may be equipped with half posts I80, as illustrated in Figs. 18 and 20. In this construction the panel units a are constructed and assembled similarly to the panel unit shown in,

Figs. '7 and 8 and heretofore described. Each half post I80 comprises a web portion I8I whose midsection is offset to provide a glass-receiving groove I82 so that the half posts I80 may also serve to provide glass frames above or below the packed panel a. The half posts I80 thus extend from the floor to the ceiling or cornice c, irrespective of the height of the packed panel a. Where glass is required above the packed panel units a, the top of panel unit a may be constructed similarly to that shown in the lower portion of Fig. 11, with'the half posts I80 continuing above the lower panel unit a to form the vertical framing members of the glass frame.

The half posts I80 are secured as by welding I83 to the web portion of panel upright I0. Each half post I80 is provided with outwardly extending flanges I84 which terminate in rebent ends I85 to stiffen and strengthen the same. In the straight partition run, as shown in Fig. 18, the half posts I 80 and the adjacent panel units are connected together by spaced clips I86 equipped with dogs I81 which extend through slots I88 provided in the flanges I84 of the half posts I80. The dogs I81 are so shaped that when the clip I86 is driven downwardly these dogs will firmly grip flanges I84 and retain the panel units in rigidly spaced position. A post cap I90 covers the space between adjacent panel units and each metal post cap is provided with rebent ends I9I which may be sprung over adjacent curled edges I92 of the clips I86 so as to removably retain the post caps in position.

Half posts I80 may be welded to vertical uprights I0 after the panel unit a. has been constructed and'assembled, as shown in Figs. 7 and 8. The head 28 of expansion member 2| may be arranged to project through the groove-forming offset portion of the half posts I80, so that the head 28 can be manipulated after the half post I80 has been welded to the vertical upright I0 of the panel unit.

If the panel units are to be arranged to form a right-angled run, the flanges I84 of the uprights positioned adjacent the inner corner may be connected by clamps comprising a V-shaped element I95 positioned against the outside faces of the adjacent flanges I84 and a U-shaped clip I96 which engages the rebent edges I85 of these flanges. Screws I91 extending through the U- shaped element I96 are threaded into the V- shaped element I 95 to secure the adjacent flanges I84 together. The outside corner is formed by a right-angled post cover I98 having rebent edges I99 which seat behind the curled ends 20l of a clip 200, the clip. 200 being provided with a dog 202 at each end thereof which extends into a vertical slot in the adjacent flange I84 of the half post I80.

In a T-partition run, as shown in Fig. 20, the branch panel unit is secured to the straight run panel units by the cooperating corner clamps comprising the V-shaped element I95 and the U-shaped element I96 secured together by the screws I91.

In the partition construction shown in Figs. 18 to 20, adjustable floor securing means attached' to the half post I may be provided to secure the Panel units to the building floor. The upper ends of the panel units extend into the cornice recess I05 of the cornice c and may be suitably secured thereto as by lug plates I30 fixed to the upper end of each half post I80, the lug plates being locked to the cornice by wedge pins I31.

In the sectional type partitions, as illustrated in Figs. 16 to 20 inclusive, for example, the panel units may be constructed with wire trays as illustrated in Fig. 8 and heretofore described, and they may also be equipped with baseboards f constructed and secured to the outside face of the panel units, as illustrated in Fig. 4. Plinth blocks may also be secured to the lower end of the post caps in the manner illustrated in Fig. 5. If desired, the baseboard may be formed to extend continuously along the bottom ends of a number of panel units, in which event the plinth blocks would be eliminated.

It will now be appreciated that I have provided an improved panel unit construction which incorporates means for placing the facing sheets under a drumhead tension. These panel units may be used in the assembly of either post type partitions or postless sectional partitions without departing from the teachings of this invention. The panel units may be equipped with glazing frames either 'removably or permanently attached to the lower packed panel section. It will be further appreciated that each panel unit may be built in one section extending from the floor to the ceiling or cornice or, if desired, may be made up of a plurality of superimposed panel sections. The facing sheets of the panel units when placed under drumhead stretch in accordance with the teachings of this invention are maintained straight and flush and free from waves and undulations, which has been a serious drawback in packed panels as heretofore constructed. It will also be noted that there are no exposed weld marks on the facing sheets, which have heretofore blemished the appearance of a partition wall,

While certain novel features of the invention have been disclosed and are pointed out in the annexed claims, it will be understood that various omissions, substitutions and changes may be made by those skilled in the art without departing from the spirit of the invention.

What is claimed is:

1. In partition construction, a panel unit comprising spaced metal panel sheets having their vertical edges rebent inwardly, a pair of spaced channel-shaped sheet metal frame members p0- sitioned between said panel sheets and having the flange portions thereof turned outwardly and seating within the adjacent grooves formed by said rebent edges, sound insulating liners secured to the inside surfaces of said panel sheets and extending between said frame members, and a plurality of spaced adjustable expansion devices extending horizontally between said frame members operative to spread said frame members to place said panel sheets under predetermined tension, and .a bracing member extending between and loosely connected to said frame members and having side edges arranged 'to provide a flrm bracing support for said liners and tensioned panel sheets.

2. In partition construction, a panel unit comprising spaced metal panel sheets, vertical frame members positioned between and connected to the adjacent vertical edges of said panel sheets, a plurality of channel-shaped sheet metal bracing members extending horizontally between said frame members having their flanges arranged to brace said panel sheets, cooperating tongues and slits associated with the ends of said bracing members and adjacent frame members providing a supporting connection therebetween, and expansion means engaging said vertical frame members operative upon adjustment to spread said vertical frame members and place a predetermined drumhead tension on said panel sheets.

3. In partition construction, a panel unit comprising spaced metal panel sheets having their vertical edges rebent inwardly, a pair of spaced channel-shaped frame members positioned between said panel sheets and having the flange portions thereof seating within the adjacent grooves formed by said rebent edges, sound insulating liners secured to the inside surfaces of said panel sheets and extending between said frame members, a plurality of adjustable expansion devices extending horizontally between said frame members operative to spread said frame members to place said panel sheets under predetermined tension, and a plurality of bracing members extending between and loosely connected to said frame members and having side edges arranged to provide a firm bracing support for said liners and tensioned panel sheets.

4. In partition construction, a panel unit comprising spaced metal panel sheets, vertical frame members positioned between and connected to the adjacent vertical edges of said panel sheets, a sound-insulating sheet secured to the inside surface of each of said panel sheets and extending between said frame members, a plurality of channel-shaped bracing members extending horizontally between said frame members, cooperating tongues and slits associated with the ends of said bracing members and the adjacent frame members providing a supporting connection therebetween, said channel-shaped bracing members having the flanges thereof arranged to abut the inside surfaces of said insulating sheets and thereby brace said panel sheets, and expansion means engaging said vertical frame members operative upon adjustment to spread said vertical frame members and place a predetermined drumhead tension on said panel sheets.

5. In partition construction, a panel unit comprising spaced metal panel sheets, a pairof vertical frame members positioned between and connected to the adjacent vertical edges of said panel sheets, a sound deadening coating cemented to the inside surfaces of said panel sheets, fibrous sound deadening material occupying the space between said panel sheets, adjustable means positioned between said panel sheets arranged to spread said vertical frame members and place a predetermined tension on said panel sheets, and a channel-shaped bracing member extending between and loosely connected to said frame members and having the flanges thereof arranged to abut said coatings and brace the tensioned panel sheets.

6. In partition construction, a panel unit comprising spaced metal panel sheets, a pair of vertical frame members positioned between and connected to the adjacent vertical edges of said panel sheets, a plurality of horizontally extending bars positioned between said panel sheets, each of said bars having a shoulder portion at one end thereof in abutting engagement with one of said frame members, a stud member at the other end of said bar in threaded engagement therewith and projecting through an opening in the adjacent frame member, an abutment element on said stud adapted to abut the adjacent vertical frame member, means on said stud for manipulating said stud to spread said frame members and place said panel sheets under predetermined tension, and a plurality of spaced bracing members extending between and loosely connected to said frame members and having the side edges thereof arranged to brace the tensioned panel sheets.

7. In partition construction, a panel unit comprising spaced metal panel sheets, a pair of vertical frame members positioned between and connected to the adjacent vertical edges of said panel sheets, a plurality of horizontally extending bars positioned between said panel sheets, a plurality of spaced abutment plates secured to the inside faces of each of said frame members, each of said bars having a shoulder portion at one end thereof in abutting engagement with one of said abutment plates, a stud member at the other end of said bar in threaded engagement therewith, an abutment element on said stud in abutting engagement with one of the abutment plates on the adjacent vertical frame member, means on said stud for manipulating said stud to spread said frame members and place said panel sheets under predetermined tension, and a plurality of spaced bracing members extending between and loosely connected to said frame members and having the side edges thereof arranged to brace the tensioned panel sheets.

8. In partition construction, a panel unit comprising spaced metal panel sheets each having a rebent edge portion at each vertical edge thereof, a pair of spaced channel-shaped sheet metal frame members positioned between said panel sheets, each of said frame members having the flange portions thereof extending outwardly and seating within an adjacent groove formed by said rebent edges, means extending between said frame members operative to spread said frame members to place a predetermined drumhead tension on said panel sheets, and a channelshaped sheet metal reinforcing member secured to each of said vertical frame members having the flanges thereof telescoped between the flanges of the frame members and outwardly offset into engagement with the panel sheets inwardly beyond the ends of the rebent edges thereof.

9. In partition construction, a panel unit comprising spaced metal panel sheets, a pair of vertical frame members positioned between and connected to the adjacent vertical edges of said panel sheets, expansion bars extending between said frame members operative to spread said frame members to place a predetermined drumhead tension on said panel sheets, a plurality of spaced bracing members extending between and loosely connected to said frame members and having the side edges thereof arranged to brace the tensioned panel sheets, a channel-shaped half post member telescoped over the vertical ends of each of said panel sheets, and means associated with said expansion bars for removably securing each of said half post members to the adjacent frame member.

10. A metal partition including, a series of. spaced posts, means for securing said posts to the building floor, panel units positioned between said posts having a wall thickness equal to the wall thickness of said post, each of said panel units comprising spaced metal panel forming panel sheets each having a rebent edge portion at each vertical edge thereof, a pair of spaced channel-shaped sheet metal frame members positioned between said panel sheets, each of said frame members having the flange portions thereof extending outwardly and seating within an adjacent groove formed by said rebent edges, and means positioned between said panel sheets and said frame members for placing said sheets under tension, post caps resiliently and removably secured to each side of said posts, said post caps having portions thereof overlapping the adjacent vertical edges of adjacent panel units retaining said panel units in position between said posts, a cornice member having a groove in the undersurface thereof into which the upper ends of said panel units and posts project, and means for detachably securing said posts to said cornice.

11. A metal partition including, a plurality of panel units each comprising spaced metal panel sheets each having a rebent edge portion at each vertical edge thereof, a pair'of spaced channelshaped sheet metal framemembers positioned between said panel sheets, each of said frame members having the flange portions thereof extending outwardly and seating within an adjacent groove formed by said rebent edges, and means positioned between said panel sheets and said frame members for placing said sheets under tension, a plurality of spaced bracing members extending between and loosely connected to said frame members and having the side edges thereof arranged to brace the tensioned panel sheets, a channel-shaped half post associated with each of said frame members and having the web portion thereof secured to the web portion of its associated frame member, clip means connected to said half posts for securing said panel units together, post caps resiliently secured to said clips covering the space between adjacent panel units, a cornice member having a groove in the undersurface thereof into which the upper ends of said panel units project, and means for detachably securing said cornice to said Panel units.

12. A metal partition including, a plurality of panel units each comprising spaced metal forming panel sheets, a pair of vertical frame members positioned between and connected to the adjacent vertical edges of said panel sheets, jacking means for spreading said frame members to place said panel sheets under tension, a post positioned between adjacent panel units having a wall thickness equal to the wall thickness of sa d panel units, post caps covering the space between adjacent panel units, resilient means associated with said post caps and said posts for removably securing the post caps thereto, base members extending along the lower ends of said panel units, means for removably securing sa d base members to the panel units, and plinth blocks overlapping the adjacent ends of adjacent base members and removably secured to the said post caps.

13. A metal partition including, spaced posts,

panel units positioned between certain of said spaced posts, a door frame member positioned between a pair of said posts, said door frame member comprising a pair of vertically extending tubular frames, a horizontally extending tubular frame connecting the upper ends of said vertically extending tubular frames, each of said tubular frames comprising a heavy sheet metal channelshaped member having a relatively light channel-shaped member telescoped over the flanges of said relatively heavy channel-shaped member and secured thereto providing a tubular frame having a wall thickness substantially equal to the wall thickness of said panel unit, spaced bolts having the head portions thereof positioned within each of said vertical tubular frames and the shank portions thereof extending through a vertically extending slot in the adjacent post, and a nut applied to each of said shanks accessible within said post, and post caps removably secured to the exposed faces of each of said posts, certain of said post caps having a portion thereof normally overlapping the adjacent panel unit and the adjacent vertically extending tubular door frame members 14. In metal partition construction, a panel unit comprising spaced metal panel sheets each having a rebent edge portion at each vertical edge thereof, a pair of spaced channel-shapedsheet metal frame members positioned between said panel sheets, each of said frame members having the flanges thereof extending outwardly and seating within the adjacent grooves formed by said rebent edges, both of said rebent edges being of the same width and each terminating short of the base of the flange which it overlaps, adjustable expansion means extending between said frame members operative upon adjustment to spread said vertical frame members and place a predetermined drumhead tension on said panel sheets, and a plurality of spaced bracing members extending between and loosely connected to said frame members and having the side edges thereof arranged to brace the tensioned panel sheets.

15. In metal partition construction, a panel unit comprising spaced metal panel sheets each having a rebent edge portion at each vertical edge thereof, a pair of spaced channel-shaped sheet metal frame members positioned between said panel sheets, each of said frame members having the flanges thereof extending outwardly and seating within the adjacent grooves formed by said rebent edges, a channel-shaped sheet metal reinforcing member associated with each of said frame members and having the flanges thereof seated between the rebent edges of said panel sheets to stiffen and reinforce said frame members, adjustable expansion means extending between said frame members operative upon adjustment to spread said vertical frame members and place a predetermined drumhead tension on said panel sheets, and a plurality of spaced bracing members extending between and loosely connected to said frame members and having the side edges thereof arranged to brace the tensioned panel sheets.

16. In metal partition construction, a panel unit comprising spaced metal panel sheets each having a rebent edge portion at each vertical edge thereof, a pair of spaced channel-shaped sheet metal frame members positioned between said panel sheets, each of said frame members having the flanges thereof extending outwardly and seating within the adjacent grooves formed by said rebent edges, adjustable expansion means extending between said frame members operative upon adjustment to spread said vertical frame members and place a predetermined drumhead tension on said panel sheets, a sound-insulating sheet secured to the inside surface of each of said panel sheets extending between the web portions of said spaced frame members, a bracing member extending between and loosely connected to said frame members having the side edges thereof arranged to provide a firm bracing support for said sound insulating sheets and tensioned panel sheets, and a relatively loose fibrous insulating packing filling the space between said insulating sheets and said frame members.

17. In partition construction, a panel unit comprising spaced metal panel sheets, a pair of vertical frame members positioned between and connected to the adjacent vertical edges of said panel sheets and extending below the lower edges of said panel sheets, expansion means for spread lng the frame members apart and placing the panel sheets under tension, an inverted channelshaped strut extending between the frame members below the panel sheets and holding the frame members together, an upright channel-shaped wiring tray supported on said strut, a metal base member positioned adjacent the lower end of the panel unit and concealing'the tray, and flange elements provided on said base member and cooperating respectively with one of the panel sheets and a flange of thetray for detachably fastening the base member in position.

18. In partition construction, a panel unit comprising spaced metal panel sheets, a pair of ver-- tical frame members positioned betweenand connected to the adjacent vertical edges of said panel sheets and extending below the lower edges of said panel sheets, expansion means for spreading the frame members apart and placing the panel sheets under tension, a plurality of horizontal struts connecting the frame members together including an upper strut bracing the tensioned panel sheets against inward buckling and an inverted channel-shaped strut positioned below the panel sheets, an upright channel-shaped wiring tray supported on said last named strut, a metal base member positioned adjacent the lower end of the panel unit and concealing the tray, and hook means formed on said base member and cooperating respectively with one of the panel sheets and a flange of the tray for detachably fastening the base member in position.

19. In partition construction, a panel unit com prising spaced metal panel sheets each having an upwardly facing pocket formed on its outer surface adjacent its lower edge, a pair of vertical frame members positioned between and connected to the adjacent vertical edges of said panel sheets and extending below said lower edges, expansion means for spreading the frame members apart and placing the panel sheets under tension, a plurality of horizontal'struts connecting the frame members together including an upper strut bracing the tensioned panel sheets against inward buckling and an inverted channel-shaped strut positioned below the panel sheets, an upright channel-shaped wiring tray supported on said last named strut, a metal base member positioned adjacent the lower end of the panel unit and concealing the tray, and vertically spaced hook elements formed on said base member and cooperating respectively with said pocket and a flange of the tray for detachably fastening the base member in position.

CARL E. T. JOHNSON.

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