US1956098A - Doorlatch - Google Patents

Description

E. A. JACOBSON DOORLA'ICH Filed Oct. 5, 1933 5 Sheets-Sheet 2 Inventor j. v7. Ja cofiwo/ Attorney Patented Apr. 24, 1934 DOORLATCH Ernest Axel Jacobson, New Sweden, Maine Application October 5, 1933, Serial No. 692,333

1 Claim.

This invention relates to an improved spring projected mechanical cam retracted latch structure suitable for use on doors and equivalent closures.

Briefly stated the invention has reference to that class of latch constructions wherein the assembly includes a barrel for placement in a mortise in the door, said barrel serving as an adapter casing for a reciprocatory projectable and retractable latch bolt and associated spring, the latch bolt being provided with at least one cam lug for cooperation with complemental cams on a manually operable push-pull trigger or actuator plate 1 which is disposed at a right angle to the cam lug and conveniently constructed for manipulation either as a push button or a pull handle.

In perfecting the particular arrangement destined to serve the purposes of my particular improvements and refinements I provide, first, an improved reversible latch bolt formed intermediate its ends with a notch having its opposite end portions fashioned to provide duplicate camlugs.

Secondly, a structural distinction is found in the particular construction of the push-pull actuator plate which is of flat rectangular cross sectional type, provided intermediate its ends with a if-shaped notch defining cam surfaces and having its ends portions provided with screw-threaded studs to accommodate detachable knobs.

A still further feature is based upon a latch plate of the aforementioned type provided at a predetermined point with a keeper hole to accommodate a swingable locking pin forming an independent and selectively operable part of the complete assemblage.

Other features and advantages may become apparent from the following description and drawings.

In the drawings Figure 1 is a side elevational view of a fragmentary portion of a door equipped with the improved latch arrangement.

Figure 2 is an end view of Figure 1 observing the same in the direction from left to right.

Figure 3 is a horizontal sectional view taken approximately on the plane of the line 3-3 of Figure 1.

Figure 4 is a vertical section, partly in elevation, taken on the plane of the line 4-4 of Figure 2.

Figure 5 is a detail elevational view of the mortise unit.

' Figure 6 is a perspective view of the push-pull actuating plate.

Figure 7 is a perspective of the latch bolt. Figure 8 is a section on the plane of the line 88 of Figure 1.

. Referring now to the drawings by distinguishing reference numerals and considering Figure 5 it will be observed that the numeral 9 designates what may be distinguished as the mortise unit. This comprises a facing plate 10 of appropriate formation and an integral cylindrical barrel 11 disposed at right angles thereto and constituting a casing. This is formed intermediate its ends with diametrically opposite accommodation and guide slots 12 for the actuator plate shown in Figure 6. Referring to Figure 6 it will be observed that this plate is of flat form and denoted by the numeral 13. It is rectangular in cross sectional shape and rectangular in top plan view. At opposite ends it is formed with integral screwthreaded studs 14 and 15 of duplicate form. Intermediate its ends on one longitudinal side is provided with a V-shaped notch 16 which defines a pair of alternately operable cam actuating surfaces 17 and 18. Adjacent the cam surface 18 the plate is provided with a hole 19 which functions as a keeper and on one side of this is an inclined or tapered depression 20 which serves as a guide for the locking means.

The locking means as shown in Figure 8 comprises a supporting plate 21 and an oscillatory shaft 22 mounted therein and provided with a knob 23. On the inner end of the shaft is a depending locking pin 24 which isadapted to swing from right to left into the keeper hole 19 as is evidenced by examining Figure 1.

I next call attention to the facing plate 25 secured to opposite sides of the 'door 26 by suitable fastening screws or equivalent elements 27. These plates are provided with slots in registry with the aforesaid slot 12 and by properly aligning this series of slots the push-pull actuating plate 13 is permitted to work back and forth so that it extends on opposite sides of the door. When assembled this plate is arranged so that the cam surfaces 17 and 18 cooperate with the cam lugs carried by the reciprocatory latch bolt 28. This bolt is shown in Figure 7 in a cylindrical form and slides back and forth in the casing 11. One end thereof is beveled as indicated at 29 as is usual and intermediate its ends and on the underside is a notch 30 formed at its opposite ends with'V- shapedcam lugs 31 and 32. This bolt 28 is intended to be reversible and either of the lugs 31 or 32 can be brought into play for cooperation with the cam surfaces 17 and 18 in the manner shown in Figure 3. The

PATENT oTFIcE eaaoaa bolt is pr d throu h the a ncy f awn/situation of the latch bolt 28 having a simple spring 33 which is located in the casing and b r against the inner end of the bolt.

The numega-ls' iia and 35 de'ignate knobs or buttons which are provid with screw-threaded sockets to-receive tb' aforementioned lugs 1-; and 15. The nu'" erals 36 are merely door handies 21 95 which may or may not be used in h manner shown in the drawings.

The structure is assembled as illustrated in the drawings and when mounted in a door it is obvious that the two knobs 34 and 35 are disposed on opposite sides of the door. Hence, the slidable actuating plate 13 can be either pushed in toward the door or pulled out from the door and in either instance the cam coaoting elements 17, 18 and the cam lug 32 serve to retract and release the latch bolt. This particular spring-pressed cam actuated latch bolt arrangement is, of course, not new. It is, therefore, to be pointed out that ne feature of the invention is the particular actuating plate 13. This is believed to be feasible, practicable and an improvement in that it is provided at opposite ends with screw-threaded shanks 14 and 15 to accommodate the detachable renewable knobs or actuating members 34 and 35. Secondly, by having these detachable knobs 3d and 35 it is obvious that by removing one of the konbs the plate can be pulled through the slot in the cover plate 25 and extracted whereby to the latch bolt 23 to be bodily removed for repairs or reversal. This is a simplified emcient assembiing advantage. Thirdly the connotch 30 formed in its bottom with the two cam noses or lugs 31 and 32 is believed to be an additional improvement.

Moreover as before stated the keeper hole 19 and guide depression 20 formed in the plate 13 to accommodate the swingable locking pin 24 and its features 21 and 23 is believed to be ingenious and a novel contribution to this particulart art.

A careful consideration of the foregoing description in conjunction with the illustrative drawings will enable the reader to obtain a clear understanding of the purpose, features and advantages, the explicit construction, and the invention as hereinafter claimed.

It is to be understood that minor changes in shape, size, relative proportions, and materials may be resorted to in practice without departing from the spirit of the invention or the scope of the invention as now claimed.

What is claimed is:

In a lock construction including a reciprocatorybolt operating member, said operating mem her having a keeper hole therein and a sloping recess in one face thereof which slopes downwardly to the hole, a supporting plate, a rocker shaft mounted for oscillation in said plate, and a right angularly disposed depending locking pin carried by the shaft for cooperation with said recess and hole for locking the operating member against movement.

ERNEST amt JACOBSON.

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