US1103204A - Controller for shoe machinery. - Google Patents

Description

V. HOFFMAN. CONTROLLER FOR SHOE MACHINERY.

APPLIGATION FILED JULY 31, 1911. r

3 SHEETS-15331 1.

Patented July 14, 1914.

THE NORRIS PETERS C(l. PNOTO-LITHQ. WASHINGTON. D. 1

V. HOFFMAN.

CONTROLLER FOB. SHOE MACHINERY.

APPLICATION FILED JULY 31, 1911.

1,103,204. Patented July 14, 1914,

3 SHEETSSHEET 2.

THE NUKRIS PETERS CO. PHOTO-LlTI-Kl, WASHINGTON, D- C V. HOFFMAN.

CONTROLLER FOR SHOE MACHINERY.

APPLICATION PILED JULY 31, 1911. 1 103,204. Patented July 14, 1914. v 3 SHEETSSHEET 3.

HI-I NORRIS PETbKa CD. PHOTO-LITHQ. WASHINGTON. I"

' tion.

rinrrnn s'rn'rns PATENT o'nrion.

VALENTINE HOFFMAN, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-FOURTH IO SELZ SCHWAB 8c COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

CONTROLLER FOR SHOE MACHINERY.

Specification of Letters Patent.

Patented July re, 1914..

Application filed July 31, 1911. Serial No. 641,447.

To all whom it may concern Be it known that I, VALENTINE HOFFMAN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Controllers for Shoe Machinery, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to controllers for shoe machinery; its primary object is to provide an automatic starter requiring for its operation pressure by the operator in carrying on his work as in crowding the material on the last, and its secondary object is to provide an automatic stop-device.

The invention consists in the matters hereinafter described and then pointed out in the claims.

In the accompanying drawing which illustrates a practical embodiment of my invention :-Figure 1 is a front view of a tacking machine embodying my invention; Fig. 2 is a side View of the same; Fig. 3 is a side view of parts of the mechanism on a larger scale; Fig. dis a top plan view of parts shown in Fig. 3; Fig. 5 is a detail cross-sectional view on the line 5-5 of Fig. 3; Fig. 6 is a detail side view of parts of Fig. 3 in their second positions; Fig. 7 is a view partly in section and partly in front elevation of parts shown in Fig. 6; Fig. 8 is cross-sectional view partly in elevation of certain parts shown in Fig. 6, and Figs. 9 and 10 are detail views of a form of clutch conveniently employed.

In the drawings the numeral 20 represents a suitable column upon which a table 21 is supported. The table is provided with any suitable tacker mechanism; in the pres ent embodiment a tacker and joiner for the inner seam between the uppers and welts of shoes is shown, it being understood that the mechanism of the shoe-machinery may be varied without departing from my inven- In the form shown the table carries a head or upright 22 having a forwardly projecting arm 23 which is provided at its front end with a laterally projecting wing 2a, to support certain parts of the shoemechanism.

A drive shaft 25 is journaled in suitable bearings 26 on brackets 27 and is provided with a loose drive pulley 28 to which power is applied from any suitable source. The

shaft 25 carries a sheave 29 near one end from which a belt transmits motion to a wheel 31'of a tack-hopper 32 mounted on a stud in the end of the lateral arm. 2a feeding the tacks in any suitable manner now well-known in the art to a race-way 40 on the front end of the arm 23; its lower end carries a driver ll moving in the nozzle 36, and its upper end is connected to the forwardly projecting arm &2 of a bell- .crank driving-lever pivoted at 43 to a bracket on the head and having a leverspring 414: wound under tension on its pivot and bearing upon the arm 42 as shown in Fig. 2. The free end 4C5 of the driving lever projects into the path of a cam 4C6 on the shaft 25 whose movement puts the lever-spring under tension to operate the driving-lever when the cam passes out of engagement with the latter; normally the free end of arm 45 rests in a depression 46 in the cam. The shaft 25 carries an eccentric 4:7 and an eccentric strap 48 which operate a separator 49 for the tacks in a manner now well understood in the art. The shaft 25 and the driving pulley 28 may be coupled by any suitable clutch; the one now about to be described is typical in this respect and has been practically used. The

shaft 25 carries a clutch-hub 5O keyed greater diameter than the depth of the channels or thickness of the sleeve 54: and normallyrest in recesses or grooves 56 cut in the periphery of the hub and out of contact withthe barrel 57 of the loose pulley 28 and so that the pulley may freely revolve on the shaft under normal conditions but when the hub and sleeve are moved relatively to each other the rollers will be cammed up against the barrel of the pulley 28 to clutch or look the shaft and pulley together to drive the former.

tent or clutch-lever 61 mounted on a rock- The sleeve 5 l of the. clutch tumbler is provided with an eccentric enlargement or head provided with a laterally opening recess to receive a coiled spring 59 which is attached at itsends to the head58 of the tumbler and to the flange 52 of the hub 50,

respectively, and the head is provided with a stop-tooth 60 which is engaged by a deshaft 62 journaled in hearings in the head and in one of the brackets 27. When the detent is in engagement with the stop-tooth 60, the spring 59 is expanded and the parts 50 and 54 are so related that the rollers 55 lie in'the grooves 56 and'do not act on the barrel ei of the pulley 28; when the detent is'withdrawn the pulling force of the spring moves the sleeve eta'round on the hub J I 50 and; this forces the rollers 55 into engagement with the barrel 57 and hub 50 to clutch these parts together to revolve the 1, shaft to which the hub is splined. When the detent returns into engagement with the stop 60 thetumbler 54: stops and the momentum of the machine expands the spring 59 to restore its tension.

A supporting arm 63 is bolted to the table 21 and at its outer end is bent or curved upwardly'as at 6A and extended forwardly in line with the tack nozzle 36, terminating slightly in the rear thereof, all as clearly shown in Figs. 1 and 2. This arm carries a. gage-slide 65 mounted in suitable guides 66 "and held in its forward position shown in Fig. 3 by a spring 67 secured at its ends to the slide and head, respectively. The rear end of the arm 63 is provided with a .pair of front and rear posts or uprights 68 and 69, the post 68 having a spring 70 coiled about it and the post 69 having a collar 71' secured to it. A sliding block 72 is provided with elongated slots to receive the posts and is supported in sliding and pivotal position thereon by the spring and collar in line with the slide 65. The block 72 carriesa lateral pin 7 which engages an elongated slot 74L in an angularly depending arm 75 fast on the shaft 62 so that as the block moves rearwardly under the impulse of the slide 65 it will rock the shaft to withdraw the detent'Gl from the stop-tooth and as it moves 'forwardly under the pull of its spring 7 6 will return thedetent into the path of the tooth, the spring 76 being secured at one end to the post 68 to. return the block to its-normal forward position. The arm 63 is provided with a depending bracket 77 which carries an upright 7 8 made hollow at its upper end to receive a coil spring 79 and'a movable post 80 resting on the spring and carrying an anti-friction roller 81 at its upperend in the path .of the cam 46. The post 80 carries a lateral pin 82 which takes over and engages the front end of the block 72 to depress its front end to tilt the block the sole in order to be-tacked to it.

as shown in Fig. 6 when the post is depressed against the tension of its spring 7 9 by the cam. 1 The forward end of the slide carries a pin 83 which engages an adjustable set-screw 84- in the arm 63 to vary the extent of its movement, and also a curved wing or gage 85 in the line of tacks and against which the work is pressed, and its rear end is beveled as at 86in order to allow the front end of the block to freely move under it and return to with it.

In using the machine the operator 18 rejquired to press the last and material against the gage or plate in order to operat-e'the machine. "Nhen pressure is thus applied to the gage 85 the slide65 is pushed rearwardly and pushes the block 7 2 in the same direction so that pin 73 turns shaft 62 to throw the idetent 6l out of the path of the stop 60. The spring 59 now moves the sleeve 54: and forces the rollers 55 out of the grooves 56 5of the hub 50 and clutches the hub and pulley together to revolve the shaft 25. As

the shaft 25 revolves in the direction of the arrow in Figs. 3 and 9 its cam 46 begins to raise the arms 45 which rested in the depression 46 in the face of the cam, and places the sprlng 44 under tension; when the cam completes about onehalf of a rev- ;olution it begins to act on roller 81 to depress the post 80 and front end of the block 7 2 when the spring 76 pulls theifront end of the block under the bevel 86 as shown in Fig. 6 which movement allows the arm to rock back to positionv to again throw the detent into the path of revolving stop. tinued revolution of the shaft operates the tack-separator and allows the arm 45 to drop [off into the recess A6 when the spring 4A 'operat es the driving-lever and driver to The condrive the tack. When that is done the stop 60 comes against the detent 61 and the parts are restored to the position of Fig. 9. By this means the clutch cannot be tripped or operated and the machine cannot make its stroke unless the'operator exerts a pressure on the slide 65, and as he exerts this pressure by applying the last and its material to the gage or wing 85 be necessarily crowds the material upon the last as the last is presented with itsbottom or sole to the tack enables the spring 7 6 to move the block to position in alinement Z r stop the machine, even if the pressure on the slide be maintained, so that the operator cannot cause a second stroke even if he fails to promptly remove the pressure of the last. hen the pressure is taken 01? the slide 65 its spring 67 draws it forward so that the block 7 2 can return to position; the tension of spring 67 may be varied to require different degrees of pressure to operate the machine, and the gage or wing of the slide may be variably positioned with respect to the tack-nozzle by a stop 87 on the slide engaging one of the guides 66 and adjusted by any suitable means such as the slot 88 and bolt 89 with the slide. By employing means requiring the pressure of the shoelast in the hand of the operator upon the gage-plate or wing to start the machine the operator necessarily must crowd the material to its place on the last; by having an automatic throw off or stop-device the machine can make but a single stroke until this pressure is removed and the parts have returned to normal position.

It is obvious that the machine may be used as a gang-tacker by causing the drivinglever to drive a plurality of tack-drivers or drivingbars by duplicating these latter parts and their associated accessories. Also, various forms of clutch may be employed, and the details of the starting and stopping mechanisms may be varied without depart ing from the scope of my invention.

I claim 1. In a machine of the class described, tack-driving mechanism, a power shaft therefor, a clutch to couple and uncouple the same, clutch-operating mechanism comprising a pair of movable elements having a slip-joint and adapted to be moved to couple the clutch by the movement of the shoe-material into the line of the tack-nozzle, cam-actuated means to move one of the elements to break the joint with the other, and a spring to retract said camactuated element to uncouple the clutch.

2. In a shoe-tacking machine, tack-driving mechanism, a power shaft therefor, a clutch to couple and uncouple the same,

clutch-operating mechanism comprising a movable slide and a pivoted sliding block having a slipjoint and adapted to be moved together in one direction to couple the clutch by the pressure of the shoe-material thereon when the latter is moved into the line of the tack-nozzle, a spring for the block, cam-actuated means to move the block to break the joint between the slide and block, and a spring to reversely move the block to uncouple the clutch.

3. A shoe-tacking machine, tack-driving mechanism, a power shaft having an actuating cam therefor, a clutch to couple and uncouple the same, a clutch-controlling element, at rock-shaft carrying said element, a slide normally in the line of the tack-nozzle and adapted to be moved by the movement of the shoe material into position to receive the tacks, a pair of posts in rear of the slide, a block slidably and pivotally supported on the posts normally in the path of the slide, a pin on the block, an arm on the rock shaft having a slot for the pin, a post in the path of the cam having a pin to move the block on its pivot, and means to return the block to normal position.

at. In a shoe-tacking machine, tack-driving mechanism, a power shaft having an actuating cam therefor, a clutch to couple and uncouple the same, a detent to control the clutch, a rock-shaft carrying the detent, a slide and block having a slip-joint and adapted to be moved together in one direction by the movement of the shoe-material into position to be tacked, posts on which the block is slidably and pivotally mounted, an arm on the rock-shaft having a pin and slot connection with the block, a post in the path of the cam to move the block on its pivot, and springs to return the slide and block to normal position when pressure is removed from the slide.

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

VALENTINE HOFFMAN.

Witnesses:

J. McRoBEnrs, H. 0. Low.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of I'atents, Washington, D. C.

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