US1980014A - Stamping machine - Google Patents

Description

Nam 5 1934. SR. SWENSON 1,930,014

' STAMPING MACHINE F4 Filed Dec. 14, 1931 5 Sheets-Sheet l J52 z/ezz ZZZ. 56272 zzeZ 22514075022 "I M W .fl@;M/: s 2456 022295.

S.-R.SWENSON 1,980,014

STAMPING MACHINE 1934- s. R. SV-VENSON v 1,980,014

STAMPING MACHINE Filed Dec. 14, 1931 5 Sheets-Sheet 5 I i I I 1/, all" 70 '12 iazrzzzefflfiwy/zs 01W (541M714 W cs jgffarjzgs.

1934- s. R. SWENSON 1,980,014

STAMPING MACHINE Filed Dec. 14, 1931 5 Sheets-Sheet 5 .8. Q I 52 j Patented Nev. a, 193i 1,980,014

UNITED. STATES PATENT-OFFICE STAMPING MACHINE Samuel R. Swenson, Chicago, Ill. ApplicationDecember 14,-1931,Se:ial No. 580,897

13 Claims. (011197-437) The purpose of this invention is to provide an for engaging'pins by which the carriage in one improved construction of the nature of a die of the forms is engaged at the base. stamping machine adapted particularly for die Figure 1'? is a detail section at the line 17--17 stamping, embossing or in any manner imprint on Figure 151 on a larger scale than said Figing-marking upon an article of limited size, such ure 14. 1 as a pen or pencil holder, pocket or fountain pen The apparatus comprises in general two sepor pencil, pocket knife, golf ball or other perarable parts, viz, a base upon which is mounteda sonal tool which may desirably bear the owners carriagefor carrying thearticleto be marked, and name or other identifying marking. The invendie-can'ying-and-operat'ing mechanism separatetion is also applicable to check writing machines. 1y mounted for support on the base as particularly The invention consists in the elements and hereinafter described. features of construction shown and described as The base indicated in its entirety by reference indicated in the claims. f letter, A, comprises as the main element a longi- In-the drawings: tudinally extending guideway member, A for the Figure 1 is a front elevation of an apparatus carriage, B, which is to carry the article to be embodying this invention. marked; and laterallyof said -guideway member Figure 2 is ,a right hand side elevation of the the base has a standard, A for supporting the same. mount, C, for the die carrier, D, said mount being Figure 3 is a rear elevation of the same. adjustable up and do on th standard, 2 f

20 Figure 4 is a vertical fore-and-aft section at positioning the dies at suitable distance above the line 44 on Figure 1. the article to be marked for accommodating arti- Figure 5 is e dissected sectional view showi g cles of different dimensions requiring correspondthe die C y d adjusting mec ingly different spacing between the-carriage and tion being at the same plane as Figure 4. the dies.

25 Figure 6 is a section at the line eh e- The detail construction of the die carrier and ure 4. die-operating mechanism will first be described.

Figure 7 is an inverted or bottom plan view of, Th di carrier t, i d t d i totality by the base show the Carriage perating me reference character, C, is formed with a sleevenism. like stem, 20, slidingly journalled on the post Figure 8 is a plan V Of the base With the "which constitutes the standard, A of the base, carria e d die-Carrying and op at meehathe post and sleeve stem having cooperating spline nism removed. i 1 and groove features, as seen at 1819, preventing F u 9 is a section at the e 011 the stem from turning on the post. For adjusture 4 viewing the construction as not inverted. ing the mount up and down for the purpose above 35 Figure 10 i a p h i Of the die i mount mentioned, the stem, 20, is furnished with a rack, and mechanism therein wit the Operating Cap 21, and there is journalled on the base adjacent to member removed for disclosing interior parts t tandard, A a spiral gear, 22, having an operand hav e eeliplihg s p y broken away ating handle, 23, said spiral gear being engaged to disclose certain detailswith the rack so that upon rotation of the gear in 1 u e 11 is a partly sectional side elevation one direction or the other, the rack, and thereby showing the carriage for the article to be marked the die earrier mount. W111 be adjusted up or adapted for holding a spherical article as a golf down, t spiral gear serving t 1 1a t as ball, section being made in the vertical plane of justed Without necessity for other l k means the fore-and-aft diameter of the ball indicated The Carrier mount, c comprises extending from 45 in dotted line at ni u i pq theremthe upper end of the stem, 20, a shell, 23, which Figure 12 is a side elevatwn of anoifher form terminates in a flange, 25, which constitutes the having the c i adapted for carrymg a s base element. of a circular head indicated in article to be marked. 7 w totality by the numeral 24 which is extended for- F gil 13 is a detail P View Of the Carrie wardly with respect to the stem, 20, so as to over- 50 shown in Figure 11. hang the carriage on the base member, A said Figure 14 is a similar view of the carrier shown head, 24, being inclined downwardly for thus in Figure 12; overhanging the carriage, which is thus overhun Figure 15 is a detail section at the line 15-15 by the lower forward marginal portion of said on Figure 11. circular head.

, 55 Figure 16 isa detail plan view of spring clasps Upon the flange, 25, there is mounted a mem-= ber, 27, consisting of thermally conductive electrically insulating material as hard rubber in which there is provided a cavity seen at 28 for accommodating an electrical heating unit, 30, and switch connections, 31, for controlling the circuit. This cavity is shown closed at the top by a disk, 32, with interposed insulation indicated at 33. The thermally conductive electrically insulating element, 27, rigidly and permanently secured to the flange, 25, may be regarded as a unitary part of the die-carrier mount, and as such unitary part of the mount it constitutes the bulk of the circular head, 24, extending, as described, from the mount stem forwardly with downward inclination overhanging at its forward lower side the carriage on the base for carrying the article to be marked.

This circular head comprises, as will be understood by reference to Figure 4, an annular seat, 35, frusto-conical in form with the wider base at the lower side.

Mounted upon this frusto-conical annular seat there maybe ,seen in Figure 2 the die carrier indicated in totality by reference character, D, and comprising a frusto-conical member, 40. On the inner circumferential face of the member,, 40, there-are formed rectangular channels, 41, in planes radial with respect to the annular seat and die-carrying member, 40, said channels traversing the entire width of the inner circumferential face of the member, 40, for accommodating dies hereinafter described. In said inner face of the frusto-conical member, 40, there is formed proximate the upper end a circumferentially extending groove, 42, which crosses all the radial channels, 41, said circumferential groove being substantially the same width as said radial channels.

The dies for stamping the article to be marked are in the form of short rods indicated by reference numeral, 50, non-circular in cross section and preferably rectangular and most preferably square as shown. The dies bear at one end the letter or figure or other character which it is their function to imprint when they are to be marked, and as indicated in the drawings, these markings comprise the full alphabet and numeral characters zero (0') to nine (9). It will be understood that the dies mounted in their respective channels are reciprocable therein for the stamping or marking stroke. And that for this marking stroke the die which is to be operated must first be positioned for making this stroke directly toward the article mounted for marking, meaning by directly that the stroke should be at right angles to the plane of the surface on which the marking is to be imprinted.

And upon considering this construction as thus far described it will be understood that for thus positioning the dies as they are individually required successively for the desired mark, the die carrier must be rotated to bring the particular die into the position described, viz, for making its stroke directly toward and at right angles to the plane of the article to be marked. For thus positioning the dies individually as required, the

annular frusto-conical die-carrying member, 40,

mounted rotatably upon the frusto-conical seat, 35, is furnished with an operating member, 45, in the form of a cap having an operating handle, 46, and frusto-conical flange, 47, which overhangs and affords means of securement to the frustoconical die-carrying member, 40, as indicated by securing screws, 48. It may be understood that the operator by means of the handle, 46, may adjust the die carrier, 40, to bring any selected die into proper marking position. In order that the operator may identify the die to be thus set for marking, the cap member, 45, bears upon the outer surface of its frusto-conical flange, 47, the alphabet and numerals above mentioned in proper circumferential order, and the dies are assembled in their proper channels in the inner face of the member, 40, radially opposite their identifying markings respectively on the outer surface of the cap flange.

It will be noted that to permit the emergence of the dies downwardly for marking, an opening must be made in the flange, 25, at the point in the circumference at which it overhangs the carriage and the article thereon to be marked; and for ensuring exactness in the position of the dies respectively when performing the marking stroke, there is mounted at said aperture in the flange a guide plate, 51, having an aperture, 52, dimensioned for fitting and guiding the dies in their marking stroke.

Upon further considering this construction it will be noted that since the guide aperture, 52, mustbe accurately fitted to the dies in order to serve its purpose of ensuring accurate position of the dies, it is essential that the operator in rotating the die carrier for bringing the proper die into operative position, should be able to halt the rotative movement with the proper die accurately registered at its lower end with the aperture, 52; and it may be recognized that it is not practicable to rely upon the acuteness of vision of the operator for determining when he has the particular letter at the position for registering the die thus accurately with the aperture; accordingly for ensuring this accuracy of registration, there is formed in the upper edge of the carrier, 41, for each die, a V-shaped notch, 55, with its apex in exact alignment with the die channel; and the cover plate, 32, whose circumferential margin overlaps and rests upon the upper edge of the die-carrying member, 40, is formed as seen at 56, to constitute a spring dog having V-shaped head for engaging the V-shaped notches as they are brought in the rotation of 120 the die carrier under said V-shaped head.

For giving the dies their marking stroke, there is provided a lever, 60, fulcrumed at 61 on the die carrier mount at the rear side thereof, said member extending substantially horizontally and 125 thereby obliquely with respect to the inclined head of the mount and the inclined carrier, through a narrowslot. 61, which is cut in the lower forward edge of the circular head and die carrier seating member, 24, said lever having at 130 its forward end a terminal, 64, dimensioned for entering the circular slot, 47, in the inner frustoconical face of the die carrier, 40, and thereby dimensioned for engaging the notch, 50, with which each die is provided as above described, and thereby also dimensioned for travel in the radial channels in which the dies respectively are seated when the lever is giving the die its marking stroke.

For actuating this lever for the marking stroke, the die carrier mount has at the forward side of the sleeve stem, 20, as shown at 67, a vertically extending hollow boss which accommodates a compression spring, 68, reacting at its lower end on the bottom web of the hollow boss; and there is provided a plunger for compressing the spring comprising for reasons hereinafter explained, a coil spring, 69, much stiffer than the spring, 68, said plunger consisting of a sleeve, '70, dimensioned for extending within the spring, 68, and 150 having at its upper end a flange, 70 for stopping on the upper end of said spring and having its lower end closed by a plug, 70 the coil spring,

69, being accommodated in the sleeve, 70, stopped at its lower end on the plug, 70 and supporting at its upper end a head block, 71, fitted slidingly in the upper end of the sleeve and extending upwardly beyond said sleeve and for slidingly in the upper end of the bore of the boss, 67.

To this head block the lever, 60, is pivotally connected, as seen at 60 and to this head block also there is pivotally connected a lever, '73, which is fulcrumed on the mount at '73, and which extends transversely of the lever, 60, through a slot, '74, formed for that purpose in the shell, 23, of the mount, and at its outer end provided with a knob handle, '75, for manual operation, which the operator will perform when upon rotating the index cap, 45, to bring the letter or figure to be marked to position by the snapping of the V-shaped dog, 56, into the V-shaped notch, is advised that the proper die is in the proper position.

For cooperating with the die carrier and its mounting and operating means, there is supported by the base at the part which is overhung by the die carrier as above described, a carriage for holding the article to be marked.

The form and construction of this carriage and the means for holding the article to it, and the means of adjustment of either the carriage or the holding means or both to position the article properly for receiving the imprint of the die, is necessarily varied according to the form and character of the article to be held and marked; and in the drawings there are illustrated three forms of carriage and holding means.

The first, adapted for holding a pen or pencil or like slender and relatively long article, is shown in Figure 1; the second, adapted for holding a golf ball or other round article which is to be marked circumferentially' as distinguished from longitudinally, is shown in Figure 11; and the third form, adapted for holdinga flat article to be marked longitudinally on its flat surface, such as a card case, is shown in Figure 12. The last form it will be seen may readily be adapted for a check writer.

The form shown in Figure 1 will be first described.

In this figure the carriage indicated at is mounted slidingly on the base, as indicated by the cooperating guideways, 81 and 82, of the base and carriage respectively, and carries rigid with the carriage a seat, 83, for the article to be marked, said seat having the face on which the article is to be lodged, formed with a V-shaped notch or groove, 83*, extending longitudinally with respect to the cooperating guideways of the carriage and base.

For holding the article to the seat and thereby to the carriage, there is provided a clamping yoke lever, 84, pivoted to the carriage, as seen at 85, adapted to be swung in an are about its pivot to carry the clamping yoke end, 86, down onto the article lodged on the seat, 83, in the notch, 83*, the sides of the yoke end clasping and being guided by the seat, 83. And for operating this clamping yoke lever, it is furnished at its fulcrum with a worm gear pinion. 8'7, which meshes with a worm, 88, carriedrotatably by a latch member. 89, pivoted to the carriage, as seen at 90, and adapted to be swung about said pivot to carry the worm into and out of mesh with the worm gear pinion, 8'7, a releasable catch being provided, as seen at 91, for holding it in mesh. An operating knob, 93, on the worm serves for rotating it to operate the gear pinion for stressing the yoke end onto the article lodged on the seat, 83.

To release the article the operator operates the release catch, 91, disengaging the worm from the pinion and permitting the yoke to be swung up off the article. In this form the carriage mounted slidingly on the base mentioned is arranged for step by stepadjustment to set the article successively in position for receiving successive imprints from the successively adjusted dies for producing the complete label desired,

For accommodating the means for step by step adjustment, the base is chambered at the under side, as seen at 98, said chamber having its rear Wall at the middle part of its length deflected outward rearwardly forming a recess as seen at 98*, for accommodating a bracketmember, 95, mounted fixedly by securement to the top wallof the chamber, as seen at 95, said bracket'serving for carrying the step-by-step adjusting mechanism. A slot, 99, is provided'in the top, opening into the chamber, and the carriage has a stem, 100, which protrudes through the slot and at the inner end has secured to it a cross head, 101, for locking the carriage slidingly on the base with the cooperating guideways, 81 and 82, properly engaged with each other for sliding adjustment; and a stretched spriizg, 120, in the chamber reacting between the chamber wall and the stem, 100, operates for holding the carriage normally,

. at one limit of, its range of sliding movement; and

parallel with the slot, 99, there is formed a slot,- 102, with which a rack bar, 103, which is carried rigidly by the carriage registers, for meshing with guideways, 81 and 82.

For operating the pawl 107 there is connected thereto a lever, 109, mounted on the rear side of the base and extending into the recess, 98*, of the chamber, 98, through a slot in the deflected part of the rear wall, as seen at 98 and a spring. 110, is arranged reacting. on the pawl and thereby on the lever in the direction for retracting the pawl over the ratchet disk. The stroke of the lever is limited for limiting the stroke of the pawl by the extentof the slot, 98.

For releasing the pawls to permit the carriage to be retracted to normal position by the reaction of the spring, 120, there is provided mounted pivotally on the shaft, 105, a lever, 121, having projecting pins, 122 and 123, positioned for encounter with the pawls, 107 and 108, respectively in the direction for disengaging them from the ratchet wheel. An operating rod, 121*, connected to the arm, 121 of the lever, 121, extends out through the end of the casing for manual operation to operate the lever for disengaging the pawls, and a stretched spring, 120*, reacting between the lever, 121, and the casing to which the spring is connected, as seen at 120 operates for retracting the lever and the pawl-releasing pins to normal position.

The construction of Figure 11 will now be described. This construction is designed for marking a round article, and particularly a spherical L56 article, as a golf ball on which the marking is to be made in a circumferential zone. For holding the article, which may be referred to as the ball, there is provided a carriage, 110, removably mounted in fixed position on the base as' by means of pins, 111, 111, at diagonally opposite corners of the carriage, engaging holes correspondingly positioned in the base. This carriage hasa'recess, 112, in its upper face wide enough to accommodate the ball and the clamping and adjusting means.

At the rear side of the recess there is provided a centering stud, 113, which is adapted for the function of centering the ball by having its head formed as a spherically concave seat approximately agreeing in the radius of its spherical concavity with the radius of the ball. 'At the forward side of; the recess axially aligned with the centering stud, 113, there is journalled in the carriage a short hollow shaft, 114, which at its inner end carries a spur-toothed or peripherally serrated wheel, 115, with whose peripheral serrations a spring detent pawl, 116, is arranged to engage as the shaft and wheel are rotated. The hollow shaft is interiorly screw-threaded, and there is screwed through it a threaded stem, 117, of a facially serrated concave disk, 118, the radius of the concavity of its serrated concave face being approximately that of the ball to be clamped between said disk and the centering stud, 113. At the forward end of the shaft, 114, at the forward side of the carriage, said shaft is furnished with an operating knob, 119, which is attached to said shaft in any suitable manner avoiding the threaded stem, 1, 13, which protrudes from theknob at the forward side of the latter, and is, there furnished with an operating head, 117, for screwing it through the shaft, 1l4 to clamp the concave disk, 1'18, againstthe ballfand thereby clamp the ball against thecentering stud, 113.

Upon consideringpthis constructionit will be understood that thels erated while the operator holds the knob, 119, the

ball will be clamped between the centering stud and the disk with its diameter aligned with the centering stud and the screw, 117. And the ball being thus clamped in position, the operator by means of the knob, 119, will rotate the hollow shaft, and with it the threaded stem which is screwed through it, and thereby rotate the ball about its diametric axis to position it for successive imprints in the equatorial zone ofthe ball; and this rotation it will be understood will be made step by step as the spring detent pawl, 116, engages the successive peripheral serrations of the wheel, 115, said serrations being at intervals corresponding to the desired intervals between the successive markings at the equatorial zone of the ball.

The construction of Figure 12 will now be described.

This construction, designed'for holding a fiat article to be marked on it's fiat surface, comprises \a flat faced carriage, 125, mounted removably on the base by pins, 126, 126, engaging holes in the base; and retained by spring clasps, 126, as seen in Figure 16 and for holding the article on. the

flat face of the carriage there is hingedly connected to the carriage at the. rear side thereof a nearly right angular part, 127, comprising lugs, 128, by which it is pivoted to the carriage as 7,, beingrotate ed to withdraw the concavedisk,.-11'8,. to; the limit at 125 of the carriage and substantially across that cavity for securement of the other end to the carriage, as seen at 131.

This spring it willbe recognized operates for holding the lip normallystressed upwardly from the fiat upper face of the carriage, and from the flat article to be marked lodged on the flatface of the carriage for that purpose. And to adapt the right angular part, 127, to hold the article securely in position for marking, there is provided a shaft, 135, extending through the carriage from front to rear across the cavity, 125*, and screwed through the rear wall of the cavity protruding against the limb, 128, this shaft being provided at the forward end with an operating knob, 136.

I claim:

1. A stamping machine comprising in combination with a 'fixed base having a rigid'upwardly extending post, a die carrier mount slidingly mounted on said post having a part projecting therefrom overhanging the base;'-a die carrier mounted on said mount movably with respect to the latter at the overhang of the mount over the base transversely of the direction in which the mount projects from the post for said overhang, said carrier mount having its slide bearing portion furnished with a rack. and a manually operable gear member journalled on the base engaging the rack for adjusting the carrier to fixed positions up and down on the post; a plurality of .dies carried by the carrier in said movement of ing the carrier in its path of movement trans- I versely of the overhang of the mount to locate a selected die at predetermined position above the carriage, the dies being individually mounted in the carrier for movement toward the carriage,

and means mounted on the die carrier mount engaging the die thus located and movable for actuating the die in the carrier toward the carriage for imprinting the article carried by the latter.

2. The construction defined in claim 1, the gear member journalled on the base for engaging the rack being a spiral gear, whereby it is adapted to hold the carrier fixedly at adjusted positions.

3. A stamping machine comprising in combination with a fixed base having a rigid upwardly extending post, a die carrier mount slidingly mounted on said post having a part projecting therefrom overhanging the base; a die carrier mounted on said mount adjustably with respect to the latter at the overhang of the mount over the base transversely 'of the direction in which the mount projects from the post for said overhang; manually operable means for adjusting the under the overhang of the die carrier mount; means for adjusting the carrier in its path of movement transversely of the overhang of the mount to locate a selected die at predetermined position above the carriage, the dies being individually mounted in the carrier for'movement toward the carriage and means mounted on the die carrier mount engaging the die thus located and movable for actuating the die toward the carriage for imprinting the article carried by the latter, the die carrier being mounted on the carrier mount for rotary adjustment in a plane oblique to the direction of actuation of the dies for imprinting, the dies having guide bearings in the carrier at like oblique angle to the plane in which the carrier is adjustable, and lever means having fulcrum carried by the mount arranged for engaging the individual dies respectivelyat predetermined position of the individual die above the carriage, and manually operable means for actuating said lever means for giving the engaged die its imprinting stroke.

4. A stamping machine comprising a fixed base and a mounting element securedto the base and having a part projecting from its securement overhanging the base; a die carrier rotatably adjustable on the mount in a plane inclined downward toward the base-overhanging side of the mount and arranged for carrying dies slidably therein, and a circular series of dies carried thus slidably positioned with respect to said plane of inclination of the mount for being each vertical at its lowest base-overhanging position; means supported on the base under the overhang of the mount for holding the article to be stamped; means for rotatably adjusting the carrier in said inclined plane to locate a selected die at said lowest position overhanging said article-holding support, and means arranged to operatively engage the die thus located for actuating the die toward said article support for imprinting the article held on the latter.

5. The construction defined in claim 4, the die carrier comprising an annular member, the mount having an annular seat for said annular'carrier, and the carrier being dimensioned and arranged for encompassing said seat, the slideways for the dies being provided at the inner side of the annrlar form of the carrier; a cap member formed for encompassing and covering the annular part of said die carrier, and meansforsecuring said encompassing and covering member to "the die carrier, said cap member having a handle for manually adjusting it and the cover on the seat of the carrier on the mount.

6. A stamping machine comprising a fixed base and a mounting element secured to the base and having a part projecting from its securement overhanging the base; a die carrier comprising an annular member mounted on the carrier mount for rotary adjustment about the axis of its' annular form in a plane inclined downward toward the base-overhanging side of the mount, and arranged for' carrying dies' slidably therein, and having a, circular series'of dies thus slidably carried positioned with respect to .the plane of inclination of the mount for being each substantially vertical at its lowest base-overhanging position, said annular part being frusto-conical with the conic angle corresponding to the obliquity of the axis of rotation to said vertical position of the slidably carried dies at their lowest position; lever means having fulcrum carried by the mount and located at the level of the low side of the inclined carrier and at the opposite side of said axis from said low side; means for engagement of said lever means with the die in the die carrier at said low side, and manually operable means for actuating said lever means for giving the engaged die its imprinting stroke, said lever means at normal position extending horizontally from the fulcrum to the point of engagement with the die, whereby the impulse communicated to the die by the lever is vertical.

7. A stamping machine comprising in combination with a fixed base having a rigid upwardly extending post, a die carrier mount slidingly mounted on said post having a part projecting therefrom overhanging the base, a die carrier mountedon said mount movably with respect to the latter at the overhang of the mount over the base transversely of the direction in which ,the mount projects from the post for said overhang; manually operable means for adjusting the mount to vertically fixed position on the post; the carrier mount being mounted on the post with a seat for the carrier in inclined position with its lower side portion projecting laterally of the post overhanging the base at one side of the post, the carrier being rotatably adjustable on the mount in the plane of inclination of the carrier; a plurality of dies carried byv the carrier in said movement of adjustment, said dies being arranged in circular succession about the axis of said rotatable adjustment; a carriage for the article to be marked mounted on the base under the overhang of the die carrier mount; means for operating the carrier for its said rotative adjustment in its path of movement transversely of the overhang of the mount to .ocate a selected die at predetermined position above the carriage, the dies being individually mounted in the carrier for movement, toward the car riage, a die-engaging and actuating lever memher having fulcrum carried by the mount, said lever extending horizontally under the carrier mount indirection intersecting the axis of the latter and arranged at its free end for engaging the dies in the carrier at the low side of the latter and opposite side of the carrier axis from the lever fulcrum, and connection for manual operation of said lever for actuating the die engaged by it toward the carriage for imprinting the article carried by the latter, the dies having each a feature for such engagement by the lever arranged for entrance of the lever end into such engagement in the rotary movement of the carrier on the mount for locating the die in imprinting position.

8. In a machine for die marking having a base for holding the article to be die marked, the base having a surface guideway and a carriage for the article to be markedarranged for movement along the guideway; a spring reacting between the base and the carriage for holding the carriage normally at one limit of its range of movement along the guideway; means for adjusting the car-- to permit its return by the reaction of the spring to normal position.

9. In a machine for die marking having a base for holding the article to be marked and an overhanging structure containing die-operating mechanism, means for positioning the article to be marked comprising in combination with the base having a surface guideway for a carriage arranged for sliding along the guideway, the base being apertured in the surface on which the guideway extends for accommodating carriage operating connections extending into the cavity, said connections including a rack carried by the carriage and an abutment for reaction of a spring, a spring reacting between the abutment and the wall of the cavity for holding the carriage normally at one limit of its range of movement on the guideway; a gear journalled in the cavity cooperatively associated with the rack for movement of the carriage along the guideway; manually operable pawl and ratchet means for rotating the gear in the direction for moving the carriage in opposition to the reaction of said spring; and manually operable pawl-releasing means for releasing the carriage from the control of the rack and gear connection to permit its return from normal position by the reaction of the spring.

10. In a die stamping machine, in.combination with a base, a die carrier and a support therefor carried by the base, the carrier being adjustable on said support for positioning a selected die in imprinting position, and manually operable means for effecting said adjustment; a carriage for the article to be marked adjustable along the base to locate the article in die-marking position; spring means for holding the carriage normally at one limit of its range of adjustment; manually operable means for so adjusting it step by step to successively position the article for receiving successive die markings. the last mentioned means comprising rack and gear connection with the carriage, and pawl and ratchet means for operating said rack and gear connections comprising an actuating pawl and a locking pawl, and manual operating means for operating the locking pawl for releasing the rack and gear connections to release the carriage for its return to normal position.

11. In a die stamping machine in combination with a base, a die carrier supported thereon and manually operable die and adjusting and operating means; a carriage for the article to be marked comprising a member mounted slidingly on the base for movement transversely of the direction of the marking stroke of the die; manually operable pawl-and-ratchet mechanism having a feeding pawl and a locking pawl, and rackand-gear means for actuating the carriage operatively associated with said pawl-and-ratchet mechanism, and automatic means for retracting the carriage upon release of the pawl-and-ratchet mechanism for releasing the rack and gear connections.

12. In a die stamping machine in combination with a base and a die carrier supported on the base and having manually operable and adjustable operating means; a carriage for the article to be marked supported on the base, the carriage having a flat upper face for lodgment of the article to be marked, and clamping means for holding the article to the carriage comprising a member hingedly mounted on the carriage at the rear side thereof having a lip overhanging the flat face of the carriage from the rear, said member having a limb extending from the hinge in direction transverse to the lip and an operating screw screwed through the carriage accessible at the forward side for manual operation and protruding at the rear side into engagement with said limb.

13. In a die stamping machine in combination with a die carrier supported thereon and die-adjusting and operating means; a carriage for the article to be die marked having means for holding the article rigidly in the carriage and adapted for clamping a ball at a diameter thereof, said means comprising an axially fixed stop for the ball at one side and an axially adjustable stop at the diametrically opposite side, the adjustable stop being screw-threaded for said axial adjustment; a hollow shaft interiorly threaded for mounting said axially adjustable stop, said hollow shaft being journalled on the carriage for rota-- tion about its axis and furnished with manually operable means for rotating it step by step, and means for automatically arresting the rotation after each such step, said screw-threaded axially adjustable stop having at the inner end a head for engaging against the ball for clamping it and having the outer end arranged for manual operation to screw, it through the hollow shaft for clamping.

SAMUEL R. SWENSON.

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