US439603A - Leather punching machine - Google Patents

Description

3 Sheets- Sheet 2.

(No Model.)

S. H. RANDALL. LEATHER PUNOHING MACHINE.

No. 439,603. Patented Oct. 28, 1890.

3 Sheets-Sheet 3.

(No Model.)

S. H. RANDALL. LEATHER PUNGHING MACHINE.

No. 439,603. Patented Oct. 28, 1890.

vgeztor.

ms versus co., FNOTD-L 1 1 UNITED STATES 'srLAs I-I. RANDALL, or WYOMING, OHIO, ASSIGNOR or ONE-HALF n. RANDALL, or SAME PLACE.

PATENT OFFICE.

TO JAMES LEATHER-PUNCHING MACHINE.

SPECIFICATION forming part of Iletters Patent No. 439,603, dated'October 28, 1890.

Application filed June 14, 1890.

'To all whom it may concern: Be it known that I, 'SILAS H. RANDALL, a citizenof the United States, residing at Wyoming, in the county of Hamilton and State of Ohio, havelnvented certain new and useful Improvements in Leather-Punching Machines; and I do declare the following to be a full, clear, and exact description of the invention, reference being had to the accomro panying drawings, which form a part of this specification. j r This invention relates to those machines. which are used by harness-makers for punching a series of holes in leather straps, 850., and the first part of my improvements comprises a novel combination of devices whereby the simple depression of the free end of a treadle causes a cutting-block to descend and hold the work down firmly upon a table of the ma- :0 chine, after which act, a gang of punches is elevated and the strap perforated in a number of places from its under side, as hereinafter more fully'described.

The second part of my improvements com- 2 5 prises a novel combination of devices whereby the strap is automatically adjusted upon the table in such a manner as to bring the center of the work in line with the centers of the various punches, as hereinafter more 0 fully described.

The third part of my improvements comprises a novel trip mechanism Wherewith certain portions of the machine can be lowered when occasion requires for the purpose of 5 affording convenient access to the gang of punches, as hereinafter more fully described.

My invention further comprises certainimprovements in the details of the machine, as hereinafter more fully described.

In the annexed drawings, Figure 1 is a front elevation of a leather-punching machine embodying my improvements, said machine being shown in condition for receiving a strap. Fig. 2 is a side elevation of the machine. Fig.

5 3 is an enlarged vertical section of the cut ting-block and its accessories. Fig. 4 is a rear elevation of the machine. Fig. 5 is a vertical section of the same. Fig. 6 is an enlarged plan of the table, a portion of the same being broken away and some of its accessories sec- Serial No. 355,469. (No model.)

tioned- Fig. '7 is an enlarged front elevation of the upper portion of the machine, the trip mechanism being liberated and the punchstock lowered. Fig. 8 is a horizontal section of the machine, taken at the line Z Z of the preceding illustration. 'Fig. 9 is a similar section taken at the line Z Z[ Fig. 10 is an enlarged vertical section showing a piece of work clamped upon the table and a punch about to ascend and penetrate the strap. Fig. 11 is an enlarged elevation of the lever that operates the parallel clamp-bars of the machine.

The base of the machine consists of a tripodcasting A, to which is secured a pillar 0r pedestal A, that carries the operative parts of the machine, said pillar being preferably composed of a piece of cold-rolled shafting with a longitudinal groove a, along its front upper portion. Projecting from the front of this pillar is a stop a, that serves as the sole supportfor all the operative parts, said stop beirig chamfered off on its under side and having normally a screw 1) in contact with it, which screw engages with a cross-bar connecting the lower ends of a pair of bell-cranks B B, pivoted at b to ears c c, projecting rearwardly from the side bars 0 O of a vertical frame, as seenin Fig. 4:. b is a cross-bar uniting the upper portions of said bell-cranks, which devices B B l) constitute the trip mechanism of the machine.

The side bars O O of the vertical frame are united at bottom, as at c", at top, as at c,

and at intermediate points by braces 0.

Furthermore, the extreme lower end of this frame has a guide 0 bearing against the front of pillar A, and in front of this guide a pivot d islocated for apair of treadle-levers D D to swing upon, the free end of these levers being furnished with a block (1' for the operators foot to press against.

, cl" is a set-screw that limits the upward swing of the treadle by bearing against the vertf cal frame, the top cross-bar of which 0 is pierced to admit a screw-threaded shaft E, which shaft is clamped to said bar by nuts 6 e and carries at its lower end an adjustable nut e", for a purpose that will presently appear. The upper end of this shaft screws into a punch-stock F, which is a casting having at its ends upwardly-projecting lugs ff, against which a bar G is forced, as more clearly seen in Fig. 8. This bar is tapped to admit screws g, which clamp a bar or a pair of bars g g" against the shanks h, of a gang of suitable punches II, as represented in Figs. 8 and 10. The main or front bar G is held in place by screws II, engaged with threaded ears 2' t", projecting from the front of punchstock F, which latter is connected by side plates F F with a cross-barJ at the extreme upper end of the machine, said bar being provided with a feather j, that traverses the longitudinal groove a of the pillar. (See Fig. 5.) j is a cap that secures this bar to said pillar. Fitted between these side plates F F" are other side plates K K, that connect a vertically-reciprocating head L with a lower section M, said head being furnished with a feather Z, traversing the groove a, and a cap Z, that secures said head to the pillar. Furthermore, this reciprocating head has a cutting-block N, secured to it by a clamp-bar n and screws or bolts a, said block being in line with the punches H. The lower section M has a feather m, traversing the groove a, and a cap m, that secures said section to the pillar. m is a lug projecting from the front of this section, which lug is pierced, as seen in Figs. 1, 5, and 9, to permit a free passage of the screw-shaft E, the latter being surrounded by a powerful coiled spring Y, that pushes against said lug, and the adjusting-nut e", the object of this spring being to elevate the section M and all its attachments. Section M has a pair of lugs 0 0, wherewith are engaged the upper ends of rods 0 O, the lower ends of the latter being pivoted at 0 0 to the treadle of the machine. Projecting laterally from this section is a bar P, having a screw 12 tapped in it, which screw pushes up an extension q of a lever Q, the swing of this lever in the opposite direction being regulated by a screw q, tapped in said extension, which screw q comes in contact at the proper moment with a lug r of hanger R, within the lower end of which latter said leveris pivoted. This lug is pierced to permit free vertical play of a screw-threaded rod S, whose lower end is secured to the lever-extension q, while its upper end carries a nut s, wherewith is adjusted the tension of a spring .9, which has a constant tendency to swing the lever Q. away from the hanger R, the latter being pendent from a frame T, as seen in Fig. 2.

Frame T has aclamp-screw t to hold a gagestrip 25 in place, as seen in Fig. 6. t are lugs wherewith said frame is secured to a horizontal table U, the latter being immovably attached to the pillar A by a bolt to or otherwise, and having a longitudinal slot a of the proper size and' shape to admit the upper ends of the punches H. Resting upon this table are two parallel bars V V, connected to links or at one end of the table and to other links a r at the opposite end thereof, an

opening a being made in one end of said table to en able said bars to be jointed to small rods V WV. These rods are carried along under the table U and then passed through openings in a shaft 20, journaled in the upper end of lever Q, as more clearly seen in Fig. 11. w w are set-screws wherewith said rods are properly secured in said shaft 10.

Punch-stock F has a feather f that traverses the groove a of the pillar, and a cap f, that attaches said stock to said pillar. (See Fig. 8.)

X in Fig. 10 is a strap or other piece of work to be punched.

In the normal position of my machine the screw 1) of the trip mechanism rests upon the stop a of pillar A, thus supporting the vertical frame 0 C c c, and as the punchstock F is rigidly connected to said frame by the screw E and nuts 6 c, said stock is raised accordingly and the top of thwunclies kept about on a level with the upper surface of table U, as seen in Figs. 5 and 10. Furthermore, in this normal position of the machine the powerful spring Y elevates the lower section M and its integral head L, which motion being communicated by the rods 0 O to the trcadle D D causes the latter to assume the position seen in Fig. 2. This lifting of the head L affords suflicient space between the block N and table U for the piece of work X to be readily inserted, the gage-strip t, which is usually of wood, having been first properly adjusted upon said table and held in place by the clamp-screw t. Again, in this normal position of the machine the screw 19 bears against the extension q, and thus swings the lever Q back until it is about parallel with hanger R, as seen in Figs. 1 and 4. Consequently the rods \V W are shifted toward the left end of table U, the result being to force the clamp-bars V V away from each other, while at the same time they are maintained in a parallel position by the links 7) "u o c. As soon, however, as the treadle is depressed, as indicated by the arrow in Fig. 2, the rods 0 O pull down the section M, head L, and bar I, and the instant the screw 19 is thus lowered with said bar the springs swings the free or upper end of lever Q away from the hanger R. The lever is then arrested by the other screw q coming in contact with the lug r of said hanger, thereby preventing the bars V V being brought too near together. This outward swing of the lever pulls the bars \V V toward the right end of table U, and in so doing said bars automatically adjust the strap and hold it in line with the centers of the punches, because the bars close up toward each other uniformly and perfectly parallel. Therefore no time is lost in adjusting the work upon the table. The continued descent of the treadle causes the head L to travel down until the cutting-block N rests upon the upper surface of the strap X, as seen in Fig. 10, which illustration shows that the work is now clamped immovably to the table U. It is apparent the head L can descend no farther, although the treadle has not completed its stroke. Consequently as the treadle continues to be forced down the frame 0 O and its attached stock F are raised and the punches H forced through the strap or other piece of work from its under side. This elevation of the frame and punchstock is due to the fact that when the head L is arrested by the contact of block N with strap X the rods 0 O serve as suspenders or slings for the treadle, and therefore the only possible result of further depressing said treadle is to elevate the frame and stock. The position the treadle assumes when it is so depressed as to accomplish this result is indicated by dotted lines in Fig. 2. Upon releasing the treadle the spring Y, acting from the lug m of the now stationary part that carries the cutting-block N, forces downward the nut e, shaftEepunch-stwk F, punches H, frame 0 O, and pivot cl until the screw 1) strikes the stop a. Then acting from the now stationary bearing e the spring Y forces upwardly this lug m", the section M of which said lug is a part, together with the head L, connecting-rods O 0', pivot o, and treadle D until the screw (1" of said treadle strikes the frame 0 C; but just before the completion of this upward stroke the screw 19 strikes the extension q, thereby forcing the lever Q toward the h'angerR and parting the guide-bars V V, which motions continue until the ascent of the head L is arrested. In

order to change or adjust the punches, the

treadle is depressed to bring the block N down upon the table U, and then to slightly raise the punch-stock F and frame 0 G,t-hus lifting the screw Z7 from off the stop a, after which act the lower ends of bell-cranks B B are swung forward until their bottom crossbar clears said stop and the treadle is thereby released. Frame 0 G, punch-stock F, and pivot (1 then descend until the screw (1" again comes in contact with said frame. After theframe and stock are thus lowered, as seen in Fig. 7, the tops of punches H are considerably below the table U, and then by slackening the screws I I the bar G, to which said punches are attached, can be readily removed from the machine. A bar with other punches attached can now be applied to the stock and secured in place by the screws, and by again depressing the treadle the frame 0 C and punch-stock F will be elevated to their previous positions. As this frame ascends, the screw 11 rides over the chamfered surface of stop a", and when said frame reaches its proper elevation the bell-cranks B B automatically swing back and cause said screw to again rest upon said stop. The machine is now in condition to be again operated, as previously described.

It will be apparent that by providing the various moving parts of the machine with feathers that traverse the groove a these parts are free to be raised or lowered, but are incapable of swinging around the pillar either to the right or left. Therefore said parts are kept accurately in line with each other Without employing an expensive and complicated system of guides, &c. It is also apparent that the frame 0 O and punch-stock F might be a single casting; but by making them in separate pieces and uniting them by the screwshaft E and nuts e c it is an easy matter to fit up the machine, and enables it to be repaired with the utmost facility.

I claim as my invention 1. The combination, in a leather-punchin g machine, of a stationary perforated table, a reciprocating head above said table, a cuttingblock secured to this head, a reciprocating punch-stock below said table, a punch fastened to said stock, an extension projecting downwardly from the latter, and a lever fulcru med to said downward extension and having another fulcrum to a connection coupled to said reciprocating head, substantially as described.

2. The combination, in a leather-punching machine, of a stationary perforated table U u,'a reciprocating head L above said table, a cutting-block N, secured to this head, a reciprocating punch -stock F below said table, a punch fastened to said stock, a treadle D D, pivoted at d to a downward extension 0 O of said stock, rods 0 0, connected to said head L and pivoted to said treadle at 0', which pivot 0' is in front of the pivot 01, a bell-crank B B, pivoted to the extension 0 O at b, and a fixed stop a, all as herein described, and for the purpose stated;

3. The combination, in a leather-punching machine, of a stationary table, a punch or gang of punches, a lever for operating the latter, a pair of parallel clamp-bars ,V V, pivoted to the upper side of said table by links 'v v o v, a vibrating lever Q, pivoted to a fixed hanger R, rods WV W, connecting said vibrating lever to said clamp-bars V V, a device that swings lever Q away from hanger R, and a projection P, extending from the lower reciprocating section M, for the purpose stated.

4. The combination, in a leather-punching machine, of a stationary table, a punch or a gang of punches, a lever for operating the latter, a pair of parallel clamp-bars V V, pivoted to the upper side of said table by links on v o, a vibrating lever Q, operated by a moving part of the machine and carrying at its upper end a shaft w, rods \V W, connecting said shaft and clamp-bars, and set-screws w w", wherewith said rods W W are adjusted within said shaft w, all as herein described.

5. The combination, in a leather-punching machine, of a stationary perforated table, a reciprocating head above said table, a cuttingblock secured to said head, a reciprocating punch-stock below said table, a punch fastened to said stock, a treadle pivoted to a downward extension of the latter, and a pair of rods coupled to said head and connected to said treadle between its pivot and free end, for the purpose herein described.

6. The combination, in a leather-punching machine, of a stationary perforated table U u, reciprocating head L, a cutting-block N, attached thereto, a reciprocating stock F, a gang of punches H, applied thereto, a frame 0 0, extending downwardly from said stock, a treadle D D, pivoted to said frame, rods 0 O, coupled to said head and connected to said treadle between its pivot and free end, and a spring Y, coiled around a rod E, attached to said frame 0 O, for the purpose herein described.

7. The combination, in a leather-punching machine, of a stationary perforated table, a reciprocating head, a cutting-block secured thereto, a reciprocating stock, a gang of punches fastened to the same, a treadle that operates said head and stock, a frame C 0, extending downwardly from the latter, a pair of bell-cranks B B pivoted to said frame, and a stop a, projecting from the supporting-pillar A, all as herein described.

8. The combination, in a leather-punching machine, of a stationary perforated table U u, a reciprocating head L above said table, a cutting-block N, secured to said head and below said table, a reciprocating stock F, having lugs f f, screw-threaded ears i t", and screws I I, engaged with said ears, a bar G, having screws g, which carrya bar 9, punches H, having shanks h, against which shanks said bar g bears, and a device that operates said stock, all as herein described.

9. A leather-punching machine consisting of the longitudinally-grooved pillar A a, having a stop a, the vertically-shiftable frame 0 C, having the trip mechanism B B b and treadle D D d applied to it, the punch-stock F, attached to said frame carrying a gang of j and cap punches and provided with a tongue f and cap f, the side plates F F, connecting said frame with the cross-bar J, having a tongue j, the head L, having a tongue 1, feather Z, and cutting-block N, the side plates K K, connecting said head with the lower section M, which latter has a feather m and is supported by a spring Y, surrounding a shaft E, attached to the frame 0 O, rods 0 0, connecting said section M with the treadle D D (l, and a fixed table U for the work to rest upon, as set forth.

10. The combination, in a leather-punching machine, of a stationary perforated table, a reciprocating head above said table, a cutting-block secu red to the latter, a reciprocating punch-stock below said .table, a punch fastened to said stock, a lever-connection for raising and lowering the latter, and a trip mechanism coupled to an extension of said stock and normally bearing against a fixed stop of the machine, substantially as herein described.

11. The combination, in a leather-punching machine, of a stationary table, a punch or gang of punches, a lever for operating the latter, a pair of parallel clamp-barsVV, pivoted to the upper side of said table by links '0 r 1; o, a vibrating lever Q, pivoted to a fixed hanger R, rods WV 7', connecting said vibrating lever to said clamp-bars V V, a spring S, bearing against a lug r of said hanger and coupled to said lever by a rod S, and a bar P, projecting from the lower reciprocating section M, all as herein described, and for the purpose stated.

In testimony whereof I affix my signature in presence of two witnesses.

SILAS I'I. RANDALL.

Witnesses:

J AMES I-I. LAYMAN, FRANCIS M. BIDDLE.

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