US2829594A - Tumble type selective hand stamp - Google Patents

Description

April 8, 1958 5. 60 2,829,594

TUMBLE TYPE SELECTIVE HAND STAMP Filed July 17, 1953 2 Sheets-Sheet 1 April 8, 1958 s. soc 2,829,594

TUMBLE TYPE SELECTIVE HAND STAMP Filed July 17, 1953 2 Sheets-Sheet 2 3 Is :m a IE m g 7t E g Y I 1 m3 g Q: I s; m llibh g :s\ Q: :E E m I c 4 E1 v 52 6/ 26 \1 m 5560 I 57 K 1 59 0 62 a a? :1 4/ l 64 Z9 23 50 42 6 1g 1 7 A7 \E \JJ 7 0 Elm fin W 027 45 Z I 56 40 I I I:

IN V EN TOR. 724% 60c,

TUMBLE TYPE SELECTIVE HAND STAMP Stanley Goc, Plentywood, Mont.

Application July 17, 1953, Serial No. 368,673

2 Claims. (Cl. 101-404) The present invention relates to hand stamps and has for its object the general improvement of hand stamps.

Another object of the present invention is the provision of a hand stamp embodying a movable frame, a stationary frame and a handle carrying an ink pad, and having stamping die block rotatably supported by the movable frame, with mechanism provided in association with the stationary frame to actuate the said stamping die block in order to revolve the same to the extent of 180 degrees in order to bring the stamp die from its normal inking pad contact to the contact with the paper in order to make impression thereon when the handle is pressed downwardly.

Another object of the present invention is the provision of a suitable mechanism to cause the rotation of the stamping die block from its operative to inoperative positions and vice versa.

Another object of the present invention is the provision in a hand stamp of the character indicated of a suitable ink receptacle provided with a pervious wall with which stamp die contacts in order to be inked when the die is brought to its operative stamping position, with piston located within the receptacle to draw the ink thereinto through said pervious wall, with a suitable mechanism to operate said piston.

A still further object of the present invention is the provision of a stamping die block having four faces, each capable of supporting a stamping die, one normally in States Patent contact with the inking pad, with the die which normally I contacts the inking pad capable of shifting into its stamping position when the handle is pressed downwardly.

Another object of the present invention is the provision of a suitable mechanism whereby the block aforesaid may be rotatably shifted so as to condition any one of the dies to contact with the inking pad and necessarily to condition that particular stamping die to imprint its impression upon the printing surface when the handle of the stamp is downwardly pressed.

With theabove general objects in view and others that will appear as the invention is better. understood, the same consists in the novel construction, combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the appended claims.

In the drawings forming a part of this application, and in which like designating characters refer to corresponding parts throughout the several views;

Fig. 1 is a side elevational View of the present hand stamp;

Fig. 2 is an edge elevational view thereof;

Fig. 3 is the side elevational view of the hand stamp while in its stamping position;

Fig. 4 is a cross sectional view on line 4-4 of Fig. 3;

Fig. 5 is an enlarged longitudinal cross sectional view through the hand stamp;

Fig. 6 is a cross sectional view on line 6-6 of Fig. 5;

Fig. 7 is a cross sectional view on line 77 of Fig. 5;

Fig. 8 is a cross sectional view on line 8-8 of Fig. 5;

Fig. 9 is a fragmentary longitudinal cross sectional view through the block supporting stamping dies illustrating the mechanism for rotatably shifting the said block in order to condition one particular die for stamping operation;

Fig. 10 is a side elevational view of the hand stamp in an inverted position with movable and shiftable frames interlocked for facilitating rotary shifting of stamp die carrying block for changing the die; and

Fig. 11 is a cross sectional view taken on line 1111 of Fig. 5.

Referring in detail to the present drawings there is shown therein tubular movable frame 11, which on transverse cross section is substantially rectangular in form. The narrower edges of said frame 11 are longer than the sides thereof, and are provided with the inturned lips which effect guides 12 for the purpose hereinafter specified.

Receivable Within the upper end of said movable frame 11 is block 13 which is affixed to said frame 11 by means of screws 14 which are driven through the edges of said frame 11 and engage the ends of said block 13. If said block 13 is made of wood or like material in that event it is desirable to embed within the ends of said block 13 threaded, socket members 15 (Fig. 5) which may be engaged by said screws 14-.

Integrally formed with said block 13 and centrally projcting therefrom in an upward direction is handle 16. Said block 13 and handle 16 are provided with central bore 17. The upper end of said handle 16 is provided with another concentrically located bore 18 of a diameter smaller than the diameter of bore 17, whereby shoulder 19 is effected in the upper end of said handle 16. Receivable within said bore 18 is a hollow flanged boss 29, the flange of which rests upon said shoulder 19. The upper end of said boss 20 terminates short of the upper end of said handle 16 effecting a space for accommodating knob 21 which normally rests upon the upper end of said boss 20.

Said knob 21 is rigidly aflixed to fiat rod 22 which is concentrically located within the bore in said boss 20 and bore 17 in said handle 16 and block 13. The opposite end of said rod 22 is extended through the end wall 22 of tube 23, and is there provided with lateral extension 24, which normally remains in a spaced relation with said end wall 22, as is seen in Fig. 5. The major portion of the free end of said tube is of reduced diameter and further down is threaded as at 58, its threads engaging the internal threads made in boss 25. Said boss 25 is made in closure 26 which fits within the upper end of the ink receptacle. Said rod 22 and tube 23 are in a concentric relation with bore 17 and handle 16. The upper end of said tube 23 normally. extending within said bore 17.

Said ink receptacle further includes the rectangular side wall 27. Closure 26 is provided with a downwardly extending flange 59 which overlies the outer face of said side Wall 27 and is in a strong frictional engagement therewith. if desired said flange 59 may be soldered to said wall 27. Perforated bottom wall 28 connecting with the lower end of said rectangular side wall 27, in a parallel relation with upper wall 26, completes the structure of said ink receptacle.

Superimposed upon the outer face of said perforated wall 28 is a piece of closely woven woolen cloth 29 which prevents flow of the ink outwardly of the ink receptacle through the perforations in said wall 28 and said cloth 29, but permits exudation of the ink, due to capillary attraction, in order to keep the surfaces of the raised letters in the stamp die moistened with ink.

Rubber guard 30 of a rectangular formation and L-shaped on a transverse cross section is stretchable by its vertical portion over the lower portion of side wall 27 of the ink receptacle in order to maintain the horizontal portion thereof in an overlapping relation with the edge of cloth 29 to maintain the latter in a stretched condition in a close fit over the face of said perforated wall 28. As is clearly seen in Figs. 4, 5 and 8 the inner edges of said horizontal portion of said rubber guard 30 define a recess within which the stamping die enters and completely fills the same. By virtue of this arrangement the evaporation of the ink is prevented.

Before said closure 26 has been engaged with side wall 27 through said flange 59 as hereinabove described, tube 23 is first extended through the opening in said boss 25 by the end of said tube 23 at which said end wall 22' is located, the smooth reduced end of said tube 23 freely passing past the internal threads in said boss 25 until threads 58 come in engagement with the said internal threads in said boss 25. The end of said tube 23 which remains within the ink receptacle is provided with an integrally formed collar 60. Piston plate 61 is provided with a central opening of a diameter larger than the diameter of said tube 23, so that when said plate 61 is positioned upon the lower end of said tube 23 said plate 61 is in a spaced relation with said tube 23. Said piston plate 61 by its edge remains in a close contact with the inner face of said side wall 27.

Receivable upon the endof said tube 23 which is within the said ink receptacle and in a threaded engagement therewith is nut 62. Said nut 62 contacts the adjacent face of said piston plate 61 but does not clamp it to said collar 60. By virtue of this arrangement when tube 23 is rotated in either direction its rotation does not in any matter affect said piston plate 61. However, there is a suflicient contact of collar 60 and nut 62 with said piston plate 61 so as to prevent passage of air past the contact points between said parts. Obviously, when a rotary movement is imparted to tube 23 in either direction tube 23 being guided by threads 58 will shift either to one or the other direction and will cause a shifting movement of piston plate 61 in the same direction, that is either toward perforated plate 28 or away from it, depending on the direction to which a rotary movement to said tube 23 has been imparted by means of knob 21 and flat rod 22. Threaded plug 63 engages the internal threads at the lower end of tube 23 and seals the same for preventing any ink from entering said tube.

Receivable within said movable frame 11 is a stationary frame 31 which is rectangular on a horizontal plane and is receivable within said movable frame 11, the two being in a telescopic mutual relation. As is seen in Fig. 5 the side wall 27 of the ink receptacle is in a spaced relation with said stationary frame 31 and normally enters the latter. The edge of said closure 26 of the ink receptacle extends beyond the outer perimeter of said flange 59 and defines horizontal flange 32 which normally rests upon the upper end of said stationary frame 31. The space between said wall 27 and the inner face of said frame 31 is filled by the vertical portion of said rubber guard 30 and said vertical flange 59, as is clearly seen in Figs. 5 and 8.

Interposed between the flange of boss 20 and boss 25, in an encompassing relation with rod 22 and tube 23 is coil spring 33, normally somewhat contracted and having a degree of tension due to its urge to expand. Due to the action of said spring 33 the ink receptacle is pressed away from block 13 with flange 32 in a frictional contact with the adjacent end of said stationary frame 31. By virtue of the action of said spring 33 frames 11 and 31 remain in a mutual extended position shown in Fig. 5.

Extending in a downward direction from one edge wall of said stationary frame 31 is a pair of legs 34, spaced from each other for defining a central slot 35. Upon the inner edge of one of said legs 34 there is an oblong recess 36 made therein, which is located at a portion of said last named leg 34 which is substantially median relative to said slot 35. On the inner edge of the other of said legs 34 there is an arcuate recess 37 made therein, which latter recess is located at a point median with into the path of said slot 39. Said leg 38 which carries said rack bar 40 is oppositely disposed to leg 34 within which arcuate slot 37 is made. The teeth of said rack bar 40 are at a point substantially median with relation to said slot 39, and are substantially in alinement with said arcuate recess 37.

Supported by the lower ends of the two edge walls of movable frame 11 for a rotary movement is shaft 41, upon which die carrying block 42 is disengageably journalled. At its end nearest to slot 35 and said shaft 41 is provided with an integrally formed head 43, while at the opposite end the same is provided with screw 44 which enters said end of said shaft 41 and remains in a threaded engagement therewith. The head of said screw 44 normally contacts the adjacent edge wall of said movable frame 11. When the screw head remains in contact with said edge Wall of said movable frame 11, at the same time said head 43 is in a spaced relation with the opposite edge wall of said movable wall 11. Rigidly aflixed to said shaft 41 by pin 45 or any other suitable means is flat guide block 46, the width of which is only slightly less than the width of said slot 35 for permitting sliding movement of said guide block 46 within said slot 35.

Integrally formed with the inner end of said guide block 46 is cogwheel 47, for the purpose hereinafter stated.

At the end adjacent said cogwheel 47 the die carrying block 42 is provided with a round cavity or bore 48, the mouth of which receives in a frictional relation ring 49, which upon its inner end is provided with a plurality of notches 50. Said cogwheel 47 is provided with as many teeth or cogs 51 as many as there are notches 50. Of course, said notches 50 and said cogs 51 are in a uniform mutual spaced relation, so that when said cogwheel 47 is rotated relative to said ring 49 the cogs thereof may fall into any of the said notches 50 when the cogs are brought in alinement with the said notches. Interposed between said cogwheel 47 and the bottom of said bore 48 and in an encompassing relation with shaft 41 is coil spring 52, the latter normally pressing against said cogwheel 47 urges the cogs thereof into notches 50 and said cogwheel 47 within said ring 49.

From hereinabove description it will be seen that normally, due to the action of said spring 52, cogwheel 47 is in engagement with said ring 49, with the outer end of guide block 46 reposing within slot 35. In this normal action of spring 52 the die carrying block 42 is interlocked with shaft 41 so that when a rotary movement is imparted to said block 42 shaft 41 rotates therewith.

Embedded within the opposite end of said die carrying block 42 and in a rigid engagement therewith is collar 53, from the outer face of which pinion 54 projects in a concentric relation. Said shaft 41 passes through said collar 53 and said pinion 54, as is seen in Fig. 5. Said pinion 54 is located within slot 39.

Said block 42 is square on a transverse cross section. Each face of said block 42 has stamp die 55 rigidly affixed thereto. When there are four faces in block 42 there will be four stamp dies 55, one attached to each face of said block. Each of said dies 55 is oblong in form, corresponding to the recess formed by the hori zontal flange portion of the rubber guard 30, so that When block 42 is in a raised position, during the inoperative condition of the stamp, seen in Fig. 5, the uppermost one of said dies 55 completely fills the said recess, and the letters formed upon the face of the said die are in contact with cloth 29. This arrangement permits instant use of the stamp die the letters of which were in contact with said cloth 29 and hence moistened with ink so as to cause perfect impression of the letters upon any proper surface, and also the recess aforesaid being filled by the die prevents evaporation or leakage of the ink.

in the operation of the device, when legs 34 and 38 by their lower ends are placed upon a paper or other surface and handle 16 is depressed against tension of spring 33, movable frame 11 will be shifted downwardly and with it shaft 41 will also shift. The shafts downward shifting will cause block 4?, to shift downwardly with die 55 which was in contact with cloth 29 disengaged therefrom. Further shifting of said shaft 41 and block 42 will bring pinion 54 in engagement with the teeth of rack bar 4%. Continuing depression of handle 16 will cause pinion 54 to rotate to the extent of 180 degrees causing the bodily rotary shifting of block 42 to the same extent. This operation will bring the die which was theretofore in contact with cloth 29 in a face to face relation with the paper. Further shifting of said block 42 and the last mentioned die 55 will bring the letters of the die in contact with the paper in order to make print impression thereon.

t is observed that rack bar 40 is substantially in a central position relative to slot 39, so that at the inception of the downward shifting movement of block no other action of the die takes place except to disconnect the same from cloth 29 and to shift the same to a sufficient distance so as to prevent any interference of the die with the horizontal flange portion of rubber guard 39. When the die has cleared the said horizontal flange portion of said guard it is only then that pinion'54 engages the teeth of rack bar 40 so as to cause the rotary movement of block 42 with the die which was in contact with said cloth 29. Said pinion 54 having cleared the teeth of said rack bar 40 and having brought about the turning of the block and the die to the extent of a half circle further shifting of shaft 41 and block 2 is not interfered with by rack bar 40.

During the shifting operation of said shaft 41, at the opposite end of said shaft guide block 46 conforms to the action of said pinion 54. At the inception of the shifting movement of said block 42 guide block 46 merely slides in the upper end of slot 35. When said pinion 54 engages the teeth of rack bar 40 guide block 46 commences to turn by one of its edges within recess 36. When pinion 54 is at the center of rack bar 40 the opposite edge of said guide block 46 enters recess 37, and further turning of pinion 54 causes said guide block 46 to undergo a turning to the extent of 180 degrees in conformity with the extent of turning of said pinion 54. As soon as pinion 54 clears the teeth of rack bar 40 guide block 46 has completed its turning to 180 degrees and enters the lower part of slot 35, as is seen in Fig. 6. V

On releasing handle 16 the same automatically shifts back to its original inoperative position by virtue of the pressure of coil spring 33; simultaneously block &2 is shifted with shaft 41. Due to the upward shifting movement of said block 42 pinion 54 necessarily must pass past the teeth of rack bar 40 whereby said block 42 is turned to the opposite direction from that hereinabove described. As a result thereof the die which was in contact with the paper is bodily turned to 180 degrees and comes back to its inoperative position in contact with cloth 29.

Manual depression of handle 16 does not affect in any manner rod 22 or tube 23. When said handle 16 is depressed rod 22 merely slides downwardly within said tube 23, or if the two frames are shifted one within the other, and the hand stamp remains in an inverted position shown in Fig. said knob 21 and rod 22 simply hang down, said rod 22 being partially shifted out of handle 16 due to gravity.

Hingedly affixed to one edge portion of movable frame 6 11 is spring actuated hook 56. When said movable frame 11 has been shifted downwardly to its fullest extent with the stationary frame, including legs 34 and 38 fully within said movable frame, as seen in Figs. 3 and 10, depressing of hook 56 will force the same to enter aperture 57 made in said edge portion of movable frame 11 and to engage stationary frame 31 at the upper portion of slot 35. This operation will interlock the two frames affording access to block 42 for the purpose of manipulating block 42 so as to condition any one of dies 55 to be in position to make impressions upon paper or any other surface.

To permit the manipulation of said block 42 for the purpose hereinbefore specified, first pressure is exerted at head 43 to bring guide block 46 out of slot 35 and out of engagement thereof with legs 34. This operation shifts cogwheel 47 into bore 48, depressing coil spring 5'2, and disengaging the cogs 51 out of notches 50 in ring 49. This shifting of parts mentioned completely frees block 42 from its engagement with shaft 41. While continuing manual pressure at head 43 block 42 is then rotated upon said shaft 41 until any desired die has come into view, that is into parallelism with closure 26. This having been done, the manual pressure at head 43 is released until cogs 51 spring back into notches 50 and block 13 becomes again interlocked with shaft 41 and with guide block 46 within slot 35.

During the conditioning of a particular die 55 for stamping operation last hereinabove described block 42 is in a spaced relation with the ink receptacle, because shaft 451 is resposing within the lowermost ends of slots and 39. The best position of the stamp while changing the die is the inverted position shown in Fig. 10.

Depressing the opposite end of hook 56 will spring said hook out of aperture 57 and its engagement with stationary frame 31 adjacent the upper end of slot 35. This will automatically shift movable frame 11 back to its inoperative position shown in Fig. 3, bringing die in contact with cloth 29.

While block 42 as shown is square on transverse cross section capable of supporting four dies 55, the stamp is of course capable of supporting a block of polygonal shape having even numbered faces, such as hexagon or octagon. To fill the ink receptacle with ink, first frames 11 and 31 are shifted one within the other, and thereupon interengaged by hook 56, as seen in Fig. 10. Thereupon knob 23% is turned in one direction so as to impart a rotary movement to rod 22. With rod 22 tube 23 will be caused to rotate in the same direction. Due to the connection of said tube 23 with closure 26 through threads 53 the inner end of said tube 23 will be caused to longitudinally shift towards the perforated plate 2%. Tube 23 shifting into that direction causes piston plate 61 to shift toward said perforated plate 23. As soon as the inner end of tube 23 comes in contact with said perforated plate 28, no further shifting of tube 23 is possible. Thereupon, while maintaining the relative position of fram s 11 and 31 shown in Fig. 3, with the hand stamp in an inverted position shown in said Fig. 10, ink is poured within the recess defined by the horizontal flange of rubber guard 30.

The ink may be supplied to the said recess defined by said horizontal flange of rubber guard 30 by eyedropper or the like. When said recess is filled with ink rotary shifting movement is imparted to knob 21 to the opposite direction for causing the reverse shifting of piston plate 61, that is in the direction of closure 26. Such shifting of said piston plate 61 creates a suction within the ink receptacle causing the ink remaining within the said recess defined by the horizontal flange of rubber guard 30 to be sucked into said ink receptacle through cioth 2) and perforations in the perforated plate 23.

By virtue of the fact that extension 24 normally remains in a spaced relation with said end wall 22 it is possible for said piston rod 22 to shift in a longitudinal direction to the extent permitted by said knob 21 and said extension 24. When the stamp remains in the position shown in Fig. knob 21 will remain within bore l8 and in contact with boss 20, with said lateral extension 24 in a spaced relation with said end wall 22'. When however the stamp is inverted and brought to the position shown in Fig. 10, the opposite shifting movement of said rod 22 will take place. Namely, in that latter position said lateral extension 24 will come in con tact with the underface of said end wall 22 with knob 21 completely shifted out of bore 18 to assume the position shown in Fig. 10. In that latter position knob 21 may be manually grasped in order to turn said knob 21, red 22 and tube 23 for shifting said piston plate 61 to either direction. When said piston plate 61 is shifted towards perforated wall 23 the air remaining in the ink chamber will be expelled through the perforations in said Wall 28 and cloth 29 preparatory to the pouring of ink upon the latter prior to the sucking of the ink there through and into the ink chamber when said piston plate 61 is shifted to the opposite direction by turning said knob 21 to the appropriate direction.

Since said piston rod 22 and knob 21 are not in any frictional contact with any parts of the device, said rod 22 is capable of making shifting movements in either direction by virtue of the gravity alone.

Screws 14 may be removed from sockets 15. When this is done handle 16 and the ink receptacle, and their appurtenances including tube 23, coil spring 33, rod 22 and knob 21 may all be removed from the remaining portions of the stamp. While these removed parts are held in an inverted position analgous to that shown in Fig. 10, the ink receptacle will also lend itself for the ink reception through cloth 29 and perforated plate 28 while operating knob 21, rod 22 and tube 23 for shifting piston plate 61 toward closure 26 within the ink receptacle. To fill said ink receptacle completely with ink a number of strokes of piston plate 21 may be required.

For all intents and purposes cloth 29 defines a pad with which one of the stamp dies 55 is in contact during the inoperative position of the stamp.

It is further observed that lateral extension 24 is insertable through the rectangular opening in wall 22' while rod 22 is maintained in a horizontal position with said extension 24 inserted within said opening in said wall 22'. Shifting said rod 22 from its horizontal position to vertical will cause the body portion of said rod itself to enter the opening in said wall 22'.

While said rod 22 remains in a vertical and coaxial position with tube 23 extension 24 bears against the inner face of said wall 22 and prevents the disengagement of said rod 22 from said wall 22' and tube 23. Due to the fact that said rod is fiat and reposes within a rectangular opening in wall 22 of a contour corresponding to the contour on cross section of said rod 22 the rotatable shifting movement imparted to said rod 22 through the medium of said knob 21 will also impart a rotary movement to said tube 23 to shift the same to one or the opposite direction for the purposes hereinahove described.

It is further observed that the wider sides of movable frame terminate considerably short of the lower end of the narrower sides of said movable frame 11, in order that the block 42 and the side dies 55 may be exposed, as is seen in Figs. 1, 3 and 10. This arrangement permits access to the recess defined by the horizontal flange of rubber guard 30 for the purpose of inserting eyedropper for pouring the ink upon cloth 29, as is clearly seen in Fig. 10.

While there are described herein preferred embodiments of the present invention, it is nevertheless to 'be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.

What I claim as new is:

1. A hand stamp comprising a stationary frame having 8 end walls, a pair of legs downwardly projecting from each of the end walls thereof, each pair of legs being in spaced relation for providing a slot, a movable frame having end walls, said last-named end walls having inturned lips on the outer edges thereof slidably embracing the outer edges of the ends of said stationary frame, the end walls of both frames being in flatwise engagement, an ink pad supported at the upper end of said stationary frame, a shaft journaled within the lower end of said movable frame, a polygonal block rigidly supported on said shaft, a plurality of stamp dies, each stamp die supported on a separate face of said block, tensioning means for urging said movable frame in elevated position to hold one of said stamp dies in contact with said ink pad, said movable frame with said shaft and said block being adapted to shift downwardly to disengage said one stamp die from said ink pad when presusre is applied to said movable frame against the action of said tensioning means, a pinion carried by one end of said block and riding within one of said slots, a rack bar carried on one of said legs, the teeth of said rack bar extending into said last-named slot, said teeth adapted to engage said pinion during an interval of the shifting movement of said movable frame to turn said block degrees to condition said one stamp die into a position for further downward shifting to the stamping operation, an elongated guide member carried by the end of said shaft oppositely of said pinion, said elongated guide member being positioned within the slot defined by the opposite pair of said legs, said last-named slot being further recessed to define with said slot an arcuate recess substantially in alignment with said rack bar teeth for permitting said elongated guide member to make a 180 degree turn during the activation of said pinion by said rack bar teeth, and means enabling adjustment of said block to condition a selected stamp die for performing a stamping operation.

2. A hand stamp comprising a stationary frame having end walls, a pair of legs downwardly projecting from each of the end walls thereof, each pair of legs being in spaced relation for providing a slot, a movable frame having end walls, said last named end walls having inturned lips on the outer edges of the end walls therof slidably embracing the outer edges of the ends of said stationary frames, the said walls of both frames being in flatwise engagement, an ink pad supported at the upper end of said stationary frame, a shaft journaled within the lower end of said movable frame, a polygonal block rigidly supported on said shaft, a plurality of stamp dies, each stamp die supported by a separate face of said block, tensioning means for urging said movable frame in elevated position to hold one of said stamp dies in contact with said ink pad, said movable frame with said shaft and said block being adapted to shift downwardly to disengage said one stamp die from said ink pad when pressure is applied to said movable frame against the action of said tensioning means, a pinion carried by one end of said block and riding within one of said slots, a rack bar carried on one of said legs, the teeth of said rack bar extending into said last-named slot, said teeth adapted to engage said pinion during an interval of the shifting movement of said movable frame to turn said block 180 degrees to condition said one stamp die into a position for further downward shifting to the stamping operation, an elongated guide member carried by the end of said shaft oppositely of said pinion, said elongated guide member being positioned within the slot defined by the opposite pair of said legs, said last-named slot being further recessed to define with said slot an arcuate recess substantially in alignment with said rack bar teeth for permitting said elongated guide member to make a 180 degree turn during the activation of said pinion by said rack bar teeth, means enabling adjustment of said block to condition a selected stamp die for performing a stamping operation, said block adjustment enabling means comprising a notched ring rigidly 2,829,594 9 10 mounted in the mouth of a cavity in one end of the block, References Cited in the file of this patent said shaft passing through said cavity and said ring in a concentric relation, a cogwheel rigidly mounted upon UNITED STATES PATENTS said shaft, and a coiled spring within said cavity in an en- 191,265 Tarbox May 29) 1877 compassing relation with said shaft, said coiled spring 5 261,229 Hl'll July 18) 1882 being interposed between the adjacent body portion of 4171278 Pnngle 1889 said block and said cogwheel for exerting pressure upon g i 2 the latter for normally maintaining the teeth of said cog- 1 083336 gf 5 1914 wheel within the notches of said ring for maintaining said fi 10 1,294,132 McClure Feb. 11, 1919 block and said shaft in a mutually inteilocked relation, 1710 633 Marks Apr 23 1929 said shaft adapted to be pressed inwardly at one end, 1:987802 Ryan 1935 against the tension of the coiled spring, to shift 2311727 Nisenson Man 1943 the teeth of sald cogwheel out of the notches of said ring permitting rotatable adjustment of said block for con- FOREIGN PATENTS ditioning a selected stamp die for stamping operation. 21,268 Denmark May 6, 1915

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