US303018A - Machine - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1'.

S. W. JAM ISON.

BOOT 0R SHOE GRIMP-ING MACHINE. No. 303,018. I Patented Aug. 5, 1884.

7 FIGJ.

ATTEST- I YYNVE'NTOR; fim W74" N. Firms. Hwwulho n mr. Washingim. n c.

(No Mociel.)

2 Sheets-Sheet 2.- S. W. JAMISON.

V BOOT 0R SHOE URIMPING MACHINE. No. 803,018. V Patented Aug. 5, 1884.

UNITED STATES Artur tries.

SAMUEL \V. JAMISOX, OF BOSTON, MASS, ASSIGNOR TO THE S. V. JAMISON BOOT AND SHOE OBIMPING MACHINE COMPANY, OF NEYV YORK, N. Y.

BOOT OR SHOE CRiMPING MACHiNE.

SPECIFICATION forming part of Letters Patent No. 303.018, dated August 5, 1884.

Application filed May 8, 1884. (No model.)

To all whom it may concern.-

Be it known that I, SAMUEL VV ILD J AMISON, of Boston, in the county of Suffolk and State of Massachusetts, have invented. a new and useful Improvement in Boot and Shoe Crimping Machines, which Improvement is fully setforth in the following specification.

This invention relates to mechanism for crimping and smoothing skins or leather by power. I have heretofore devised machines for this purpose, for which Letters Patent have been granted at different times. (See Patent No. 218,177, dated August 5, 1879, and those referred to in the specification making part thereof.) Machines embodying the patented improvcments,while practical and useful, have nevertheless been found tohave certain defects. These the present invention is designed to remove. In order properly to'perform the crimping operation, neither tearing the material nor stretching it so little that it resumes its former shape, the pressure against the crimpingj aws must be adapted to the thickness and texture of the skin in process of crimping.

It is found that skins even of the same kind and grade vary from one another to such an extent that it is necessary or very desirable to change the pressure almost constantly. Sometimes it may be with every successive skin. In my former machines, wherein the pressure is applied by a weighted lever-arm, which tends to turn ascrew-shaft, the weight on said leverarm is connected with a treadle. By depressing the treadle the operator eanlift the weight and relieve the pressure on the crimping-j jaws.

It hasbeen attempted to regulatethe pressure on the jaws by pressing more or less upon the treadlc; but it is dilficult or impossible to balance more or less of a weight, so as to effect a satisfactory regulation. This is partly because there is no movement of the treadle under the foot, unless the weight is lifted bodily, and

also because the operator is required to apply more pressure on the treadle in order to diminish the pressure on the crimpingj aws. This mode of applying pressure on the jaws is also objectionable,because theweight s always set to a certain maximum, which can only be changed by increasing or diminishing the 0 weight on the lever. 1n the present invention a series of levers are provided, through which the operator applies more or less pressure on the crimpingjaws by increasing or diminishing the pressure upon a treadle or other device of a similar nature. A spring or equivalent means retract the jaws, holding them open when the pressure is not applied. In this invention, also, a great simplification is effected,

and the construction and arrangement of parts is such there is less liability of breakages occurring.

The following is considered the best mode of applyingthe principle of the invention, reference being had to the accompanying draw- 6 5 ings, which form part of this specification.

Figure l is a front elevation of a machine constructed in accordance with the invention,

parts of said machine being broken away to show devices behind; Fig. 2, a partial view in vertical section; Fig. 3, a side elevation, and Fig.4 a detail view.

The machine'frame consists of a pedestal, A, and upright side frames, 13, the latter being connected together at the top. The trucks 7 5 E, which carry the criinpingjaws D, and 'smoothingjaws E, slide on ways attached to or making part of the side frames. On each truck aretwo cylinders or turrets, F G, re-

spectively, and fitting over each cylinder or turret is a sliding cap, H I. The caps are prevented from turning on their respective turrets by pins or Ebolts 40, which pass through the lugs 41 on the caps, and are fastened in the body of the truck. on the pins or bolts 40. Each cap or slide H carries a crimping-jaw, D. This jaw is pivoted on the face of the cap by a pin, 1, and its position is adjusted bythe set-screws 2, of

which there are two to each jaw-one on each side of the pivot. The cap on slide His fastened (by a screw, as shown) to a plunger, 4., which is free to slide in the turret F. A spiral compressionspring, 3, confined between the plate 5 (fastened by screws to the turret F) and the enlargement 6, at the outer end of the The lugs 41 mayslide 85 through lugs 25 on the trucks.

plunger 3, tends to move the crimping-jaw outward or away from the tree or crimping form N. The crimpingjaws are pressed inward by the operator during the descent of the trucks, in order to act upon the leather on the form or tree N. A lever, K, pivoted at 7 to lugs on the back of each truck 0, bears at 8 against the outer end of the plunger 4.. The bar L, connected with the side frame, B, at top and bottom by means of the short links 9, is arranged outside each leverK, so that when depressed said bar is by the turning of'the links 9 forced inward, and, bearing against the friction-roll at the end of lever K, presses said lever in also. The bars L are each joined by a connecting-rod, 10, to a short arm, 11, of the rock-shaft M, which latter is journaled in bearings in the pedestal A. Apedal-lever, P, is keyed at the middle to the rock-shaft M. By bearing on the pedal 12 at the front end of the lever the operator can depress both bars L, and force in the crimping-jaws I), simultaneously and to an equal extent. The rear arm carries an adjustable weight, 13, the object of which is to turn the rock-shaft whenever the operator lifts his foot from the pedal. The smoothing-jaws E are each pivoted at 14 to and between brackets 011 one of the caps I. Toggle-levers Q, jointed to lugs on the cap I, and jaw E, move the latter into and out of position for acting upon the leather on the tree or form. Each toggle is operated by a bell-crank lever, B, pivoted at 15 to a bracket on the cap I, and provided at the end of its horizontal arm with a pin, 16, which fits in a slot in the link 17, connected with the central pivot-pin, 18, of the toggle. The caps or slides I are each fastened by screwsv or otherwise to a thick rod, 19, which passes through a hole in the truck. A very strong spiral compression spring, 20, -surrounds the rod 19, and is confined between the face of the cap and the truck. These springs tend to force the caps I and smooth ing-jaws E inward, so as to bear against the leather or skin on the tree or form N. At the outer end of the rod 19 isacross-bar, 2l,which projects into grooves 22 in the side frames. At the ends of the cross-bar are rollers,which travel over the track 23 at the inner side of the grooves. This trackis cut away at the bottom, forming an incline, 24. WVhen the crossbar 21 reaches the said incline, saidbar is re leased gradually, and the spring then presses the smoothing-jaw against the leather on the tree. The trucks 0 are raised and lowered by the screw'shafts S, which are journaled in bearings of the side frame, and are tapped The shafts S are turned by bevel-gears 26, which are engaged by the gears 27 on the cross-shaft T. The screw-shafts S are so threaded and the gearing so arranged that the trucks move up and down together at equal speed. The shaft T is driven bya belt on the pulleys28, 29, and

30. The intermediate pulley, 29, is fixed on the said shaft. The outer ones, 28 and 30, are loose. When the machine is at rest, a crossed belt runs on one loose pulley, a straight belt ving the roekshaft half way and moving the belt, which was previously on the middle pulley, onto a loose one, and thus stopping the machine. Abrake, X, is applied when the belt leaves the fixed pulley in order to stop the machine more quickly. The tree or crimping-form N is fastened to slides 37, which are free to movein ways of the standards 38,which are bolted to the pedestal A.

The operation of .the machine is as follows: The trucks being at the top of the machine the operator places the leather or skin 011 the tree,

and starts the machine by turning the handle 35 to the right. The screw-shafts S draw down the trucks. WVhen the crimping-jaws are in position to act upon the leather or skin, the operator by his foot on the treadle applies pressure to the crimping-jaws and varies the pressure as his judgment dictates. The arrangement through which the power is transmitted multiplies enormously the pressure on the treadle. As the truck continues to descend the cross-bars 21 escape from the tracks 23, and the springs then force the smoothing-jaws inward'so that they act upon the leather immediately after the crimping-jaws. WVhenthe trucks approach the end of their descent the projection 36 acts upon the cam 34, and turns the rock-shaft WV to the left, shifting the belt onto the loose pulley and stopping the ma chine. I11 order to start the truck upward, the operator turns the handle 35 still farther to the left, so as to bring the other belt upon the middle pulley. Before he does this, however, he releases the pressure upon the crimping-jaws, whereupon the springs 3 open them, and he also turns back the smoothing-jaws and removes the crimped skin. lVhen the truck is at the top of its movement, the projection 36 acts upon the cam 33, turns the r0ck-shaft WV to the right and stops the machine.

It is evident that modifications may be made in details without departing from the spirit of the invention, and parts of the invention may be used separately. Thus, instead of springs, weights could-be used, but the springs admit of a more compact and less expensive construction in the machine.

The turrets need not be cylindrical, but may carried by said trucks, and a system of levers connected with a treadle, as set forth, for clhsing said jaws upon the leather when the treadle is depressed and magnifying the pressure transmitted from said t-readle, substantially as de scribed.

'2. The, combination, with the sliding trucks and the crimping-jaws carried thereby, of the levers connected with a treadle, as set forth, for closing said jaws, and the springs for separating said jaws on release of the treadle, substantially as described.

The combination, with the truck and the turret thereon, of the sliding cap, the crimplug-jaw, the plunger, and spring, all carried by said truck, substantially as described.

4.. The combination, with the trucks and crimping-jaws carried thereby, of the levers iulcrumed one on each truck, the bars for acting on said levers to press in the crimping jaws, the links connecting the said bars with the machine-frame, the treadle, and the connections bet ween the said treadle and the afore said bars, substantially as described.

5. The combination, with a truck and turret thereon, of the sliding cap, crimping-jaw, plunger, spring, lever carried by the truck, operatingbar connected by links to the macl'iine-franie, and the treadleconnections, substantially as described.

6. In a leather-crimping machine, the combination,with the machine-frame and the sliding trucks movable in ways of the machineframe, of the smoothing-jaws, the slides or sliding caps carrying the said jaws, and-the springs for forcing said slides and jaws inward, substantially as described.

7. The combination, with the trucks, the smoothing-jaws, and the springs and slides or sliding caps connected with said jaws, of the tracks on the machine-frame, and devices, such as the rod and cross-bar, for holding back the smoothingjaws except when they are in position to act-upon the leather, substantially as described.

8 The combination, with the trucks, the power mechanism for raising and lowering the same, the crimping and smoothing jaws placed on said trucks, and the tree or crimping form,

of the treadle and connected levers, as set forth, for pressing in the crimping-jaws, and the springs and slides or sliding caps connected with the smoothing-jaws, substantially as described.

9. The combination, with the machine-frame and the tree or crimping form carried by slides on said frame, of the trucks, the crimping-j aws, the treadle, and the connections for conveying the pressure from the treadle to the crimpingjaws and for magnifying the pressure conveyed, substantially as described.

10. The combination, with the trucks, the

jaws carried thereby, and the power mechanism for raising and lowering the same, of the treadle and connections for conveying pressure from said treadle to the crimping-jaws and for magnifying the pressure conveyed, and the stop mechanism for arresting the trucks at the ends of its movements, substantially described.

11. The combination of the machine-frame, the tree or crinipingform carried by slides, the trucks, the smoothing-jaws carried by said trucks, and the springs and slides or sliding caps connected with said smoothing-jaws, the cross-bar arranged at the back of the trucks and connected with the smoothingjaws, and the tracks on the machine-frame for holding them away from the leather until the proper point in their descent is reached, substantially as described.

12. The described crimping-machine, comprising, in combination, the machine-frame, the form, the trucks, the power mechanism, the jaws on said trucks, the treadle and lever mechanism, as set forth, for pressing in the crimping-jaws, the springs and slides or sliding caps connected with the smoothingjaws, and the stop mechanism, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

S. \V. JAMISON.

\Vitnesses:

A. PoLLoK, PHILIP hLlURO.

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