US2317410A - Heel-attaching machine - Google Patents

Description

April 27, 1943. 'r. sEELY 2,317,410 4 HEEL ATTAGHING MACHINE I Filed April 2]., 1941 3 Sheets-Sheet l WI/E/V THE? April 27, 1943. T. H. SEELY HEEL ATTAC'HING MACHINE 3 Sheets-Sheet 3 Filed April 21, 1941 Patented Apr. 27, 1943 I UNITED STATES PATENT OFFICE 2,317,410

BEEL-ATTACHING MACHINE Thomas H. Seely,Me1rose, Mesa, assignor United Shoe Machinery Corporation, Flemington, N. 1., a corporationof New Jersey Application April 21, 1941,- Serial No. seam :5 Claims. (cue-42) This invention relates to machines for attaching heels to shoes, and especially to those in which a shoe and heel are clamped together upon a support, and then subjected to the action of a tool or tools for effecting the insertion of a screw through a passage in a last within the shoe and through the heel-seat into the heel.

An object of the invention is to eil'ect the clamping oi the work by means which gives the operator free access to it, and which applies the clamping pressure eifectively and in a manner which may be varied for work of different forms. with this in view, I combine with a support for a lasted shoe and a heel, and a tool for operating thereon, a work-clamping device, which may include a lever, movable into engagement with the last of the work upon the support and thereupon extending upwardly and rearwardly from said last, and a mounting joining the member to the machine-frame and situated above the support. With this arrangement, the clamping member in its active position is entirely removed from the field in which the operator must manipulate the work. As herein disclosed,'to,the lever of the work-clamping mechanism are pivotally connected two arms, also pivoted to the machineframe, one being joined to the lever'through a link. This link and the arm joined to it furnish a toggle, through the straightening of which the clamping lever may be actuated. The direction of approach of the. clamping member to the work is preferably alte ed by changing the pivotal connection of the lin to the lever. To enable the operator by depression of a treadle to first move the clamping member quickly into engagement with the work, and, thereafter to apply a relatively heavy clamping pressure, two levers are fulcrumed upon the treadle and are yieldably urged toward each other, as by a connecting spring. The treadle also carries clutch mechanism, and two links join the clamping mechanism to the clutch mechanism and to one of the V levers.

link. Through the two links, the work-approaching and pressure-applying actions of the clamping mechanismare effected. Such an actuating erate upon the work, to act only with a. predetermined force. This may be for the purpose of preventing a heel-attaching screw from being set too hard, so the thread formed in the heel might The other lever has means for producing engagement of the clutch mechanism with its be stripped. Another object of my invention is .to free a tool from its driving means by effective mechanism, accurate in its response to the chosen releasing force. About a. driving shaft, a sleeve is' rotatable and is connected to the tool, there also being a clutch-disk rotatable about the shaft and co-operating with a clutch member carried by said shaft. The disk and sleeve are compelled to rotate together while moving relatively longitudinallyof the shaft, and have a spring or other means for forcing them yieldably togethertoward each other. Movable longitudinally of the shaft is means for varying this force, as by a screw extending through the end of the shaft, convenient for adjustment by the operator. That the resistance oflered by the clutchelements to release may be uniform, they are constantly lubricated from a receptacle which surrounds said elements and'is rotatable with the clutch. To this receptacle,'the lubricant r: ay be supplied during rotation through an opening in a surrounding stationary casing. With the clutch-elements arranged as just indicated, the receptacle is preferably carried by the sleeve connected to thetool. Any excess of lubricant supplied to the receptacle may be collected in a depression in the casing, and discharged through an opening therein.

Since the rotation of the shaft through which the tool is driven may endanger the operator by contact with it, an object of the invention is to properly protect this. To thisv end, it is guarded by a surrounding sleeve formed of intermeshing oppositely placed helices. The guard is flexible,

may be made resistive to distortion, and by form ing the helices undera stress tending to contract them, the weight of the parts is partially counterbalanced.

A further object of the invention is to so mount certain mechanisms of the machine, that they are situated conveniently for the particular operator by whom they are to be used, and so they shall properly co-operate with each other. For

, .the attainment of this object, a column is movcarrying able vertically in the machine-frame, said frame the work-support. Work-clamping V mechanism and an operating tool are mounted together upon the column for co-operation with the support. The clamping mechanism and tool are thus simultaneously adjustable as to height,

' as for the purpose of locating the clamping mechanism for proper engagement with the work upon the support. The work-support may be positioned vertically upon the frame as desired bythe opera or. I have herein shown a member carried by the frame and upon which the column rests, together with means arranged to raise and lower the member. When the column is adjusted in this manner, it is desirable that it shall not disturb the normal position of the treadle, because of its connection to the clamping mechanism carried by the column. One of a series of connecting members between the treadle and clamping mechanism is, therefore, movable upon the frame, and another upon the column or other mounting member for the cwmping mechanism. The member upon the frame is unaffected by the adjustment, and the companion member may be so related as to be little disturbed. I prefer to employ in the connections two levers, one fulcrumed upon the frame and the other upon the mounting member, and to connect these two levers by a substantially horizontal link.

In the accompanying drawings illustrating a particular'form of the invention,

Fig. 1 shows the upper portion of my improved machine in side elevation, with parts broken away;

Fig. 2 is a similar view ofthe lower portion of the machine;

Fig. 3, a vertical section through one'of the driving clutches taken in a plane from front to rear of the machine;

Fig. 4; a front elevation of elements;

the work-clamping Fig. 5, a broken side elevation of such elements in their normal positions; and

Figs. 6 and 7, full horizontal sections on the lines VI-VI and VII-VII, respectively, of Fig. 3.

In many respects the present apparatus remechanism IB actuated by treadle mechanism C.

Here, it is subjected to the action of drilling mechanism D for operating a drill at through a passage in the last to make a hole through the heel-seat of the shoe into the heel. Thereafter, a temporary screw s is inserted in the hole through the last-passage by driving mechanism E, until the head of the screw acting against the crown of the last-cone draws the cup of the heel firmly against the heel-seat, to retain it until an interposed adhesive has set.

A frame I0 furnishes at the top a table l2,

through which passes a spindle I4, which may be clamped in different vertical positions by a setscrew l8. A vertical bore in the upper extremity of this spindle receives a stem l8 upon the worksupport A, which "may be fixed at different heights by a set-screw 20. Both the spindle and stem areshown spotted to assure proper retention by the set-screws, those for the stem being more closely spaced. Thus, a coarse and fine adiustment of the work-support is provided, which is employed for both varying th position at which the work is engaged by the clamping mechanism D and the level of said work for the convenience of the operator. The support A has'a tread-rest 22 for .the shoe and heel, the angle of'which may be altered by an adjusting wedge 24, and there is aback-stop 26 for the heel, this bein'gvariable in height.

- Through a verticalbore in an enlargement 28 at the rear of the table passes a tubular column 30.

Upon this-are clampedb screws 32 brackets. 34

and 36, these, respectively, carrying theclamping mechanism B and the drilling and screw-driving path. followed by the rod 50 is indicated by thev mechanisms D and E. At the bottom, the column rests upon a base-piece 38, below which is a collar 40, supported by a nut 42 threaded upon the lower extremity of a rod i4 rising through the column. The hooked upper end 46 of the rod passes through a slot in the column, and lies in a depression in the top of the enlargement 28. By turning the nut 42, the base-piece and column may be lifted together or allowed to descend to locate the clamping mechanism and the drilling and driving mechanisms at difl'er'ent levels. Having set the work-support A at a height chosen by the operator, by the screws l6 and 20, adjustment of the column will position the clamping mechanism to properly approach and engage the last-cone to hold the work for the operations upon it. In the latter respect the adjustment of the work-support also may be utilized, the screw 20 giving a fine adjustment.

The clamping mechanism 18 has a cross-rod E50, extending between the lower extremities of two spaced side-pieces of a lever 52 and arranged to bear upon the crown of the cone of the last L. At their upper ends, the side-pieces are joined by a rod 54 (Fig. 4) The lever 52 has a floating fulcrum-pin 56, which pivotally connects an upper linl:v 58 to a lower arm 60 made up of spaced sidepieces pivoted at 62 upon the bracket 36. The link 58 is pivotally joined at M to an arm 66, which is in turn pivoted at 65 upon the bracket 34. A slot 1'0 in the lever 52 may lee-shifted along the fulcrum-pin 56, it being located at predetermined points by a cross-pin 12, which is engaged by any one of a series of pairs of depressions 'M in the sides of the lever 52. In the selected depressions, the pin 12 is retained by a pair of tension-springs "l6, l6, connecting the pivot-pins 54 and 6 1. To an extension from the arm 68, near its center. a rod 18 is joined. At the threaded lower extremity of the rod, supported upon a nut and lock-nut ill].

is a compression-spring. 82. Upon the upper end of the springrests a collar 84, loose upon the rod and'engaged by a cross-pin 86 extending through a slot in said rod and connecting the spaced arms 88 of a bell-crank-lever 89. Another arm. 92 of the lever projects upwardly, and is joined by a link 94 to one arm of a bell-cranlr-lever $16 fulcrumed beneath the table l2. From a second arm of the lever 96, rods or links 58 and 99 lead to the treadle mechanism C.

The elements of the clamping mechanism E are initially related as appears in Fig. 5 of the draw ings. The arm 66 is prevented from swinging r'earwardly past the vertical position by a stopscrew I00; threaded into the arm and contacting with the column 30. placed upon the support A, actuation of the treadle mechanism draws down the rod I8. This straightens the toggle, formed by the arm 66 and the portion ,of the link 58 above its pin", and lowers the lever 52, the rod 50 engaging the crown of the last-cone. This is as shown in Fig. 1. The

upper curved dash line (Fig. 5) joining its extreme positions. This is with the cross-pin "F2 in the lowest pair of depressions 14 in the leverl'iz.

' As the lasts and heels vary in form, the pin may After the work has been giving the operator access ,to it wholly without interference.

Considering now the mechanism C through which the clamping mechanism B is actuated, there is fulcrumed at H6 at the bottom of the frame a treadle I I2, having connecting its spaced side-arms a foot-pad II4 for depression by the operator. The treadle is held normally raised by a tension-spring I I6, connected to the underside of the table I2. It may be latched down to hold the work under clamping pressure by a footlever II6, iulcrum'ed at I26 upon the treadle and having a detent I22 engaging some one of a series of teeth I24, upon a segment I26 carried upon the frame. An expansion-spring I26 interposed between the treadle and the lever II6 urges the latching detent against the segment. Fulcrumed at I36 upon the treadle is a lever I32, compelled initially to move bodily with the treadle by a spring I34, whichjoins it to said treadle and acts to draw a projection I36 from its lower end against the fulcrum I26 of the latching lever.

Fulcrumed at I36 with the, lever I32 is a second lever I38, which at its outer extremity is held yieldably against the end of the lever I32 by a mechanismc, associated with the treadle-rod 99.

A normally fixed block I44 of the clutch mechanism is pivotally mounted at I46 upon the treadle H2, and may be adjusted toward and from the lever-roll I42 by a contactes cre'w M8 threaded horizontally upon the treadle. Guided upon the stationary block I44 is a movable clutch-block H52, for engagement by the roll M2. The op posed faces of the clutch-blocks may be recessed vertically to receive between them an extension I54 pivoted at I66 upon the rod 66.

When the operator depresses the treadle M2 to bring the rod 56 of the mechanism B into engagementwith the last in theshoe upon the support A, the roll I42 is so positioned that it does not exert clutching pressure upon the block H52,

. tension-spring I46 extending between them. The

Y ing ill (Fig. 3) and a lower bearing ltilis aver- I and the rod 99 is freely movable. The treadle,

however, transmits movement through the lever till, link tihlever 96, link 94, lever 96, spring 82 and rod ill, to straighten the toggle- lever 66, 58 and carry the rod .56 into engagement with the last-crown, as has already been described. This is accomplished speedily, incause the effective attachment of the link 98 to the treadle mechanism is close to the operatorfs foot. When the rod 66 rests upon the last-cone, the movement of all the elements joining it to the lever I32 stops. so the end of this lever at the link 98 is held against movement. Depression of the treadle continues, both the springs I34 and M6 expanding. The outer end of the lever I36 is separated from the end of the'lever I32, and the contraclockwise movement of the lever-fulcrum vI36 (Fig. 2) causes the roll I42 and the clutch-block l52 to be forced together, urging said block toward the block I44 and clutching the rod-extension l54 to the treadle. The rod 96, through the chain of elements previously traced, applies relafulcrum Ill and the extension I64, and between said fulcrum and foot-pad II4. In its clamping position, the treadle is maintained by the detent I22, to be released when desired by-depression of the latching lever H8. The tension of the v springs I34 and I46 may be adjusted by screws I66, I66, threaded through the lever E32 and to,

which they are connected. Yield of the spring I46 limits the force which may beapplied by the roll I42 to the clutch 0. Variation in the position' of the screw I46 allows the normal relation of the clutch to the roll to be adjusted. Since 6 the clamping force is applied to the work through the loaded spring 62, the compressibility of this spring, determined by adjustment of the nuts 66, limits said force.

It is desirable that'the normal height of the treadle II2, which may be varied to suit the operator by a terminal I62 threaded upon the link 66, shall remain constant, to whatever height the column 36 may be adjusted. "Sucha condition is attained by the actuating connections of this invention. The'fulcrum of the lever 66 is fixed and, therefore, unchanged by. the adjustments, while the vertical shift of the lever 66,

I fulcrumed through the collar 46 to move with the column and acting upon the substantially horizontal link 64, has little effect upon the lever 96. Therefore, any change in the height of the treadle, produced by movement of the column, is

negligible.

Taking up the operating mechanisms D and E which, respectively, drill the work and insert a screw therein these mechanisms are supported together upon the bracket 36 with a motor M6, by which they are driven. The mechanisms may be similarly mounted and operated, and only the screw-driving mechanism E will be described in detail. This mechanism E is carried by a casing I12, secured to the end of a stem H4 extending horizontally through an opening in the bracket 35 and secured adjustably by a set-screw l'lt. Journaled in the casing in an upper heartical shaft lat, there being a sleeve ltd fitting about the bottom of the shaft, between it and the hearing lllll. The shaft is rotated by belt-gearing I86 from the motor-shaft, that of the mechanism E turning at a less speed than that of the mechanism D. The sleeve m4 is internally threaded at its lower extremity to receive an upper threaded portion of a universal joint ltl'. The lower portion of the joint has fast upon it the upper section of a. telescopic extensible shaft I83, the lower section of which is united through a universal joint I66 (Fig. 1) to a short shaft W2. Secured in an opening in the bottom of the casing H2 about the shaft I68 and its universal joints is a guard-sleeve g, which prevents contact of the person of the operator, or of work-parts with the enclosed rotating elements of the machine. Attached to the lower extremity of the guard-sleeve is a collar tilt, and separably connectedto this collar by a bayonet joint iflfl is a handle 266, arranged to be grasped by the operator and in which the shaft E92 turns. Uutside the handle there is secured to the shaft till a -chuck N2, of such forrnas to receive and compreferably formed, as best shown in Fig. 3, of intermeshing oppositely placed inner and outer helical strips of sheet-metal 264 and 265, ll- 01' channel-shaped in cross-section. These strips a about the driving pins H2.

22! rotates, the oil is thrown by centrifugal force are wound under a stress which causes the helices to contract longitudinally, and, therefore, to shorten the sleeve. This tendency at least partially compensates for the weight of the lower section of the shaft I" and the elements which it carries, making-it easier for the operator to manipulate the driven tool. .Supports 201' are mounted for vertical and horizontal adjustment upon the bracket 34. By these, the tools of the mechanisms D and E may be held in inactive positions convenient for their taking and return by the operator.

It is desirable that the force exerted by the screw-driver or other tool shall be limited. This may be provided, for example, in order that the screw 3 shall be turned into the work with its head exerting a substantially definite heelclamping pressure upon the last. Consequently, there is provided, between the driving shaft I82 and the driven sleeve IN, a' clutch which will release when the proper force is exerted. Extending horizontally through a bore in the shaft above the sleeve is a cross-pin 208 (Fig. 3). Resting upon thepin is a disk 208, in the underside of which are depressions 2H1, 2 l0 separated by 180 The disk and sleeve are compelled to rotate together, while capable of independent vertical movement, by two pins 2|2 rising from the sleeve and extending into openings-in the disk. This disk is urged into engagement with the cross-pin by a spring 2, interposed between said disk and a washer 2" of inverted cup-shape, upon which rest flat washers 2IB. To allow a variation in the i'orce with which the spring 2 urges the.

disk 20. into engagement with the cross-pin 205, there is recessed into the upper washer a crossbar 220 movable vertically in a slot in the shaft I82. Guided in an axial bore in the shaft is a rod 222,

hearing at its lower end upon the crossbar and,

having contacting with its upper extremity a screw 22! threaded axially into the shaft. The screw may be turned in either direction to lower orpermit to be raised the rod, crossbar and wash- -ers, and thus the expansive effect of the spring this purpose, the sieeve I is extended upwardly at no about the clutching surfaces and outside the depending skirt of the washer 2 IE to furnish an oil-receptacle. The oil may be delivered to this receptacle, while it is rotating, through an inlet-pipe 22! opening through the upper or cover-portion of the casing I12. Flowing from the delivery-opening, the oil is directed by an annular drip-flange 230 upon the casing and a downwardly and inwardly inclined surface 232 at the upper side of an inwardly projecting flange 23 at the top of the receptacle; Over the surface 222, it flows through a narrow annular space between the flange and the washer 2l6.- Within the receptacle, the oil is free to pass to the clutching surfaces through, clearance spaces inthc/disk 2B8 As the receptacle to the outside in a circular body,-which narrows as it rises and isretained by the flange 234. Any

excess 0! oil which has been supplied will escape interior of the casing H2. The falling oil is directed by a lower external annular flange 228- upon the receptacle into a depression 238 near the bottom of the casing. As it gathers in the depression, the oil may escape through a pipe 2%, leading through the bracket 36 into the column 30. Here, it may be collected in a receptacle. In'introducing oil through the pipe 228, the escape through the pipe 24!) serves as an indication of the suiliciency of the supply. The oil, which is thereafter retained within the receptacle 226, will properly lubricate the mechanism for a considerable period. With this normal charge of oil, the contracted space between the flange 234i and the washer m holds against escape the oilvapor created by the movement of the elements within the receptacle.

-In using the apparatus, the operator, placing the cup of the heel upon the heel-seat of a lasted shoe S, applies their tread-surfaces to the rest 22 of the support A. Between the heel-seat and the heel-cup, an adhesive has been applied. De-

pressing the treadle N2 of the mechanism C, the

rod 50 of the clamping mechanism B, through the rod and intermediate connecting elements, is brought upon the crown of the last L within the shoe. Continued actuation of the treadle separates the'lever N8 of the treadle mechanism from the lever 532 the consequent movement of the lever-fulcrum 030 causing the clutching of the rod-extension l58 to the treadle between the blocks I and .852. Now, relatively heavy pressure, of a degree determined by the load which has been placed upon the spring 82, is applied to the work through the rod 99 and the same connections as for the rod 98, and the treadle is latched at I22, E24 to hold this pressure. Taking the constantly rotating drill or the mecha:

nism D from its support 20? by its handle 200, the operator passes this drill through the lastpassage to produce a hole in the heel-seat or the shoe and in the clamped heel. Returning the drill to its support, the operator places a screw .9 in the last-passage, and applies to its head the chuck 202 of the inserting mechanism E, manipulating' this similarly to the mechanism D. When the chosen turning force upon the screw is exceeded, the cross-pin 208 in the driving shaft I82 leaves the depressions in the disk 208 to stop the rotation of the screw-driver, it clicking in and out of these and warning the operator that the insertion is completed. The chuck is thereupon removed from the screw-head, and the mechanism E returned to its support, the work now being unclamped by depressing the latching lever H8. The shoe with its temporarily attached heel is thus released by the mechanism 3 for removal from the support A.

Having described my invention, what I claim as new and desire to secure by Letters Patent 01 the United States is:

1. In a heel-attaching machine, a support for a 'lasted shoe and a heel to be attached thereto, a. tool for operating upon the work, a workclamping device including a lever movable into engagement with the last of the work upon the xii-support and thereupon extending upwardly and rearwardly from said last, and a mounting for the lever situated above the support.

2. In a heel-attaching machine, a frame, a support for a lasted shoe and a heel to be attached thereto, said support being carried by the vframe, a tool for operating upon the work through the last, a work-clamping member extending upwardly from said last, and a mounting for the member joining it to the frame and being situated above the support. 1

3. In a heel-attaching machine, a frame, a

I support for a lasted shoe and a heel to be atpivotally connected to the lever, a second arm pivoted upon the frame,.a link pivotally connected to the second arm and to the lever and furnishing withsaid second arm a toggle-lever, and

means for straightening the toggle-lever to render the clamping lever effective. a A

4. In a heel-attaching machine, a tram a support for a lasted shoe and a heel to be attached thereto carried by the frame, .a tool movable upon the frame for operating upon the work, a clamping lever arranged for engagement with the last, an arm pivoted upon the frame and pivotally connected to the-lever, a-second arm pivoted upon the frame, a link pivotally connected to the second arm and to the lever, and means connected to the second arm for actuating the clamping lever.

5. In a heel-attaching machines. frame, a support for a lasted shoe and a heel to be attached thereto carried by the frame, a tool movable upon the frame for operating upon the work, a clamping lever arranged for engagement with the last, an arm pivoted upon the frame and pivotally connected to the lever, a second arm pivoted upon the frame, a pivotally connected to the second arm and to the lever, means arranged to make the pivotal connection at different points along the lever, and means conanism, a second lever fulcrumed upon the treadle ing member and to the lever, a link connected/ to the 'clamping.member and arranged for engagement by the clutch mechanism, a second lever iulcrumedupon the treadle, a spring joining the second lever to the first, and means carried by the second lever for producing engagement of the clutch mechanism with its link.

10. In a heel-attaching machine, a support for a lasted shoe and a heel to be attached thereto, a tool for operating upon the work, a work-clamping member movable against the last, a treadle, clutch mechanism carried by the treadle, a lever fulcrumed upon the treadle, a link connected to the clamping member and to the lever a link connected to the clamping member and arranged for engagement by the clutch mechanism, a second lever having the same fulcrum as the first and yieldably urged toward it, and a roll rotatable upon the second lever for actuating the clutch mechanism.

11, In a heel-attaching machine, a support for a lasted shoe and a heel to be attached thereto,

. a tool for operating upon the work, a work-clampnected to the second arm for actuating the clamping lever.

6. In a heel-attaching machine, a frame, a support for a lasted shoe and a heel to be attached' thereto carried by the frame, a tool movable upon the frame for operating upon the work, a clamping lever arranged for engagement with the last and provided with a slot and a series of depressions, an arm pivoted upon the frame and having a pivot entering the lever-s1ot,.

a second arm pivoted upon the frame, a link joined to the second arm and to the pivot of the first arm in the slot, a projection from the link which may be placed in any one of the leverdepressions, and means for actuating the clamping lever.

"I. In a heel-attaching machine, a frame, a support for a lasted shoe and-a heel to be attached thereto carried bythe frame, a tool movable upon a projection from the link which may be placed in any one of the lever-depressions, and a spring joining the connection between the second arm and the link to the lever.

8. In a heel-attaching machine, a support for a lasted shoe and a heel to be attached thereto, a tool for operating upon the work, a workclamping member movable against the, last, a treadle, clutch mechanism carried by the treadle, a lever fulcrumed upon the treadle, a link connected to the clamping member and to the lever, a link connected to'the clamping member and arranged for engagement by the clutch meching member movable against the last, a treadle,

clutch mechanism carried by the treadle, lever mechanism fulcrumed upon the treadle, a link connecting the clamping member to the lever mechanism, a link connected to the clamping member and arranged for engagement by the clutch mechanism, and means arranged to vary the position of the clutch mechanism with respect to the lever mechanism. v

12. In a heel-attaching machine, a support for a lasted shoe and a heel to be attached thereto, a tool for operating upon the work, a. work-clampmg member movable against the last, a treadle,

clutch mechanism pivoted upon the treadle, lever mechanism Iulcrumed upon the treadle, a link connecting the clamping member to the lever mechanism, a link connected to the clamping member and arranged for engagement by the clutch mechanism, and a contact-screw threaded upon the treadle and engaging the clutch mechanism to turn it upon its pivot.

.13. In a heel-attaching machine, a support for a lasted shoe and a heel to be attached thereto, a tool for operating upon the work, a work-clamping member movable against the last, a treadle, a plurality of successively eifective links through which the treadle may act with different leverages upon the clamping member, and members including a loaded spring for connecting each of the links to the clamping member.

14. In a heel-attaching machine, a work-support, a rotatable tool co-operating therewith, a I

rotatable driving shaft, a sleeve rotatable about the shaft and connected to the tool, a clutch-disk rotatable about the shaft, a co-operating clutch member carried by the shaft, means for compelling the disk and sleeve to rotate together while moving relatively longitudinally of the shaft, and

means for forcing the disk and co-operating clutch member yieldably together.

15. In a heel-attaching machine, a work-sup:

- port, a rotatable tool co-operating therewith, a

rotatable driving shaft, a sleeve rotatable about the shaft and connected to the tool, a clutch-disk ing from the sleeve and engaging the disk, a

spring surrounding the shaft, and means extending through the shaft for forcing the spring against the disk. I

17. In a heel-attaching machine, a work-support, a rotatable tool. co-operating therewith, a rotatable driving shaft, 9. spring surrounding the shaft, clutch members connecting the shaft and tool for engagement under the influence of the spring, a member extending transversely of the shaft and movable thereon to act upon the spring, and an adjusting member extending'longitudinally of the shaft and engaging the'transverse member.

18. In a heel-attaching machine, a work-support, a rotatable tool co-operating therewith, a rotatable driving shaft, a spring surrounding the shaft, clutch members connecting the shaft and tool for engagement under the influence of thespring, a member movable upon the shaft to act upon the spring, and an adjusting screw for the member extending through the end of-the shaft.

19. In a heel-attaching machine, a work-support, a rotatable tool co-operating therewith, a rotatable driving shaft, a clutch through which the'shaft drives the tool, said clutch releasin when the tool encounters a predetermined resistance, and a receptacle for a lubricant rotatable with the clutch.

20. In a heel-attaching machine, a work-support, a rotatable tool co-operating therewith, a

rotatable driving shaft, a clutch through which the shaft drives the tool, said clutch releasing when the tool encounters a predetermined resistance, a'receptacle for a lubricant rotatable with the clutch, and means through which the lubricant may be supplied to the receptacle during rotation.

21. In' a heel-attaching machine, a work-support, a rotatable tool co-operating therewith, a rotatable driving shaft, a sleeve rotatable about the shaft and connected to the tool, a clutch connecting the tool and shaft, and a receptacle for a lubricant surrounding the clutch and carried by the sleeve.

22. In a heel-attaching machine, a work-support, a rotatable tool co-operating therewith, a rotatable driving shaft, a clutch through which the shaft drives the tool, said clutch releasing when the tool encounters a predetermined resistance, a receptacle for a lubricant rotatable with the clutch, and a stationary casing surrounding the receptacle and having an opening and means for directing into the receptacle the lubricani introduced through the opening.

23. In a heel-attaching machine,'a work-support, a rotatable tool co-operating therewith, a rotatable driving shaft, a sleeve rotatable about extending about the clutch members.

24. In a heel-attaching machine, a work-support, a rotatable tool co-operating therewith, a rotatable driving shaft, a clutch through which the shaft drives the tool, said clutch releasing when 'the tool encounters a predetermined resistance, a receptacle for a lubricant rotatable with the clutch, and astationary casing surrounding the receptacle and having an opening and means for directing into the receptacle the lubricant introduced through the opening, .the casing further being provided with a lubricantcollecting depression and an opening through which the collected lubricant may be discharged.

25. In a heel-attaching machine, a work-support, a rotatable tool co-operating therewith, a

rotatable driving shaft, a sleeve rotatable about the shaft and connected to the tool, a clutch connecting the tool and shaft, and a receptacle for a lubricant surrounding the clutch and carried by the sleeve, said receptacle having at its open side an inwardly extending lubricant-retaining projection.

26. In a heel-attaching machine, a work-support, a rotatable tool co-operating therewith, a rotatable driving shaft, a sleeve rotatable about the shaft and connected to the tool, a clutch connecting the tool and shaft, a receptacle for a lubricant surrounding the clutch and carried by the sleeve, said receptacle having at its open side an inwardly extending lubricant-retaining projection, and a member rotatable with the shaft and lying in proximity to the projection to form therewith a narrow passage for the lubricant.

27. In a heel-attaching machine, a work-support, a rotatable tool co-operating therewith, a rotatable driving shaft for the'tool, and a guardsleeve surrounding the shaft and formed of intermeshing oppositely placed helices.

28. In a heel-attaching machine, a work-support, a rotatable tool co-operating therewith, a rotatable driving shaft for the tool, and a guardsleeve surrounding the shaft and formed of intermeshing oppositely placed helices which are under a stress tending to contract them longitudinally.

29. In a heel-attaching machine, a frame, a work-support carried thereby, a column vertical- 1y movable through the frame, means for securing the column at different heights, and wort:- clamping mechanism and an operating tool mounted upon the column for cooperation with the support. 7

30. In a heel-attaching machine, a frame, a work-support carried thereby, means arranged to vary the height of the work-support upon the frame, a column vertically movable through the frame, means for securing the column at difierent heights, and work-clamping mechanism and an operating tool mounted upon the column for co-operation with the support.

31. In a heel-attaching machine, a frame, a

umn rests, and means arranged to raise and lower the member.

securing the column at difierent heights,

32. In a heel-attaching machine, a frame, a work-support carried thereby, a column vertically movable through the frame, means for workclamping mechanism mountedupon the column and co-operating with the support, a rod supported by the frame and extending through the lower portion of the column, a member surrounding the rod and upon which the column rests, and a nut threaded upon the rod and supporting the member. I

33. In a heel-attaching machine, a frame, a work-support carried thereby, a work-clamping member co-operating with the support, a mounting member variable in position vertically in the frame and upon which the work-clamping member is movable, a treadle, and a series of connecting members between the treadle and workclamping member, one of said connecting members being movable upon the frame and another movable with the mounting member.

34. In a heel-attaching machine,--a frame, a work-support carried thereby, a. work-clamping member co-operating with the support, a mountoperating with ing member variable in position vertically in the frame and upon which the work-clamping member is movable, a treadle, and a series of connecting members between the treadle and work-clamping member, one of said connecting members consisting of a lever fulcrumed upon the frame and another of a lever fulcrumed to move with the mounting member, with a substantially horizontal link connecting the levers.

35. In a heel-attaching machine; a frame, a

work-support carried thereby, a columnivertically movable through the frame, means, for securing the column at different heights, work-clamping mechanism mounted upon the column and cothe support, a member carried by the frame and upon which the column rests, means arranged to raise and .lower the member. a lever arranged to be raised and lowered with the member, a lever fulcrumed upon the frame,

a link connecting the levers, means for joining the first-mentioned lever to the work-clamping member, a treadle, and means for joining the second lever to the treadle.

- THOMAS H. SEELY.

QER'I'IFICATE OF CORRECTION. Patent No 2,517,1u0. April 27,3 5.

THOMAS H. -SEIELY.

It is hereby certified that error appears in the printed specification of the above numberedpatent requiring correction as follows: Page 1, first column, line 22, for "active" read --inactiVe--; and second column, line 11-12, after theword "yieldably" strike out -togethar--; page 1;, second column, line 75 ,'claim 2 ,.strike out "said'f and insert instead "engagement with the--;-page 5, first column, line 58 claim 7, for "slots" read -'-slot---; andthat the said Letters. Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 6th day of July, A. D. 1915.

Henry Van Arsdale, (Seal) Acting Commissioner of Patents.

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