US2267840A - Heel-breasting machine - Google Patents

Description

Dc. 30, 1941- F. RlcKs l-:TALy

HEEL-BREASTING MACHINE Filed April 24, 4 Sheets-Sheet l Dec. 30, 1941.

F. RlcKs ET AL HEEL-BREASTING MACHINE Filed April 24, 1940 4 Sheets-Sheet 2 Dec. 30, 1941. F. RlcKs ETAL HEEL-BREASTING MACHINE Filed April 24, 1940 4 Sheets-Shea?I .3

Dec, 3o, 1941. F.y RICKS Em. 2,267,840

HEEL-BREASTING MACHINE Filed April 24, 1940 4 Sheets-Sheet 4 Patented Dec. 30, 1941 Fred Ricks and William Arthur Barker, Leicester, England, assignors to United Shoe Machinery Corporation, Borough of' Flemington, N. J.,'a corporation of New Jersey Applicatin April 24, 1940, serial No. 331,268

In Great Britain May 19, 1939 '34 Claims.

This invention relates to mechanism for operating upon shoe parts, and is particularly concerned` with improvements in machines for breasting heels by means ofa reciprocating knife of the type shownjfor example, in United States Letters Patent'i NoQ 1,117,627, granted November 1914, on anapplic'ationof Arthur Bates. It is to be understood, however, that the several features of this invention are ofgeneral utility and areA adaptable for use in any machine for breasting heels by means of a reciprocating knife or for operating upon shoe parts by means of areciprocating tool.V

In the operation ofthe machine disclosed in the aforementioned patent, the heel to be breasted is h'eld'on an open cutting block by hand and is positioned thereon, with respect to the breasting knife, by bringing its top lift 'into engagement'vvith the knife, Whichfis first lowered to permit thisfWhen the" vmachine is tripped, by'me'ans of the continued movement of a hand lever provided for this purpose and"a lso for lowering the knife initially, the knife descends to breast the heeland then returns lto its original elevated position, freeing the breasted heel for removal by the operator. Prior to tripping the machine, While the heel is being positioned on theblock, and also vduring the breastin'g action, the knife is Wholly expos'ed'and the danger of injury to the operatoris great should the machine be accidentally tripped as the operator is manipulating the knife to locate the heel on the block or should the operator fail to remove his hands from the Vpath ofthe knife before intentionally tripping the machine to breast the heel.

lAccordingly, an object of this invention is to eliminate this danger of operator injury which is inherent in heel-breastingmachines of the aforementioned type. Additional-objects of this invention are to facilitate the breasting of heels in machines of the kind herein being considered and also to improve the quality of the Work done by such machines.

, With these objects in View, important features of this invention are the provision, in a heelbreasting machine having a power-operated knife, of animproved loading device `for locating, holding and presenting heels to the knife without bringing the hands dangerously close thereto; the provision of a novel safety mechanism, cooperating With vthe loading device and a movable means for controlling the power drive mechanism to operate the knife; and the provision of an improved knife-guard arrangement cooperating with the novel safetymechanism in Icarrier and a fixed part of the machine; the

provision of means for positioningra heel accurately on the carrier in contact with adjustable gages thereon when the carrier is in a loading position, remote from the breasting knife and means for clamping the heel securely against displacement While being moved With v the carrier to and from breasting position beneath the knife and for holding the heel during the breasting operation; rthe provisionY of means cooperating with the vcarrier and associated with the heel-positioning means for automatically ejecting a breasted heel therefrom; and theprovision of means for removing chips and cuttings from the carrier .and from Athe carrier-locating surfaces while :the carrier is beiner returnedto loading position. 'y

These and other features -of Athe inventionwill appear moreifully. from the following detailed description,'when read in connection with the accompanying drawings, and will be pointed-out in the appended claims. Y v f Inthe drawings,

Fig. 1 is a front elevation of aheel-breasting machine embodying the present invention, With by these 'parts when the vloading device is in its loading position;

Fig. 5 is aplan view of the safety ymechanism ofthe machine With the parts shown in the positions they assume when the loading device is in its loading -position and the movable Vvcontrol means blocked; i l Y Fig. 6 is a rear elevation of the parts shown in Fig. 5, with certain elements broken away; and

Fig. 7 is a front elevation of the machine, partly in section and with parts broken away for the sake of clarity.

Before proceeding to a detailed description of the illustrated machine its general construction and mode of operation will be outlined. Referring to Figs. 1 and 7, the machine comprises a frame I in which is mounted a slide 3 carrying a breasting knife 4. The slide is reciprocated to operate the knife by a power drive mechanism similar to that disclosed in the aforementioned patent to Bates and which is arranged to be operated by the downward movement of a control rod |89 associated with a safety mechanism indicated generally by the reference character |510. As is usual in power drive mechanisms of this type, the arrangement is such that uponoperation by the -control rod a single reciprocation ofl the knife is caused and the parts come to rest with the knife in its original elevated position, as shown in Fig. 1. Before the power drive mechanism can be operated again the control rod must be returned to its original position and the safety mechanism is arranged to do this.

The loading device comprises a carrier II arranged to be swung, by an operating handle 23, to a breasting position beneath the knife, as shown in Figs. 1 and 4, and to a loading position remote from the knife, as indicated by the broken-line position of certain of its component.

parts and a heel H in Fig. 4. The carrier is provided with heel-locating gages 21 and 31 which cooperate with heel-positioning means 45, 45, mounted independently of the carrier and associated with an ejector arm I 63, to locate a heel on the carrier when it is in its loading position. A clamping device is also mounted on the carrier, and the operating means for this rdevice is associated with the operating handle of the carrier in such a manner that the operator can clamp the located heel to the carrier and move the carrier to and from loading and breasting positions with one hand. i

The safety mechanism is mounted on the right-hand side of the machine and is arranged is block movement of the control rod when the carrier is in any other than` breasting position,

to release the control'rod when the carrier is in breasting position, to lock the carrier in breasting position while the knife is operating, and to prevent the elevation of a knife guard |11 when the carrier is in breasting position and the knife is operating. When the guard is elevated the safety mechanism cannot be operated to release the control rod.

The safety mechanism is also arranged to return the control rod to its original position after a cutting cycle is completed and is itself reset to block operation of the control rod by the return of the carrier to loading position after a breasting operation has been performed. In the illustrated machine, the control rod is 'spring operated so that when released by the safety mechanism In the operation of the machine the heel to be breasted is placed on the carrier when it is in its loading position remote from the breasting knife, as indicated by the broken lines in Fig. 4, and is positioned thereon by the gages on the carrier and the heel-positioning means. The operator then grasps the operating handle of the carrier and the operating means for the clamp mechanism associated therewith with one hand to clamp the heel in place and to swing the carrier to its breasting position. When this position is reached, the safety mechanism releases the rod I 09 which is then moved automatically to operate the drive mechanism whereupon the knife is reciprocated to breast the heel. Upon the return of the knife to its upper position, the carrier, which was held against movement by the safetymechanism during the breasting cut, is released, and can be returned to loading position. As the carrier approaches its loading position the heel ejector |63 is operated to eject the heel, the heel-positioning means being simultaneously moved away to permit this operation and subsequently returned to its operative position when this movement is completed. During this return movement of the carrier a pneumatic device |39 is tripped to blow the chips and cuttings from the carrier and from cooperating locating surfaces on the carrier and its supporting means.

Turning to a detailed description of the irnproved loading device, and referring to Fig. 1, the carrier II is mounted on a rotatable stud I1, journaled in an extended portion of a casting 9, for swinging movement about an axis parallel to the direction of movement of the knife 4. This casting is provided with arcuate guiding surfaces I3 mounted for angular movement in the upper portion of a sleeve 1, and is held in adjusted angular position by means of a clamp screw I5. The sleeve 1 is mounted for vertical adjustment on the front of the machine frame I and is locked in adjusted position by means of a clamp screw 5. As will be seen from Fig. 4 the carrier is substantially L-shaped and is provided at its lefthand end with the extending operating handle 23 for swinging it between limits determined by an adjustable stop screw 24 and cooperating locating surfaces 11 and 80 provided on the carrier and an extended portion of the sleeve 1, being in operative position when the locating surfaces are together, as indicated in Fig. 4, and in loading position when swung back against the stop screw 24.

The heel gage 21 is shaped to contact the back surface of the top lift of the heel H, and is slidably mounted in a guideway 29 formed in the carrier. An adjusting screw 33, having an operating head 3I, is rotatably mounted in the carrier and threaded through a downwardly projecting ear 35 of the heel gage. By turning the screw the position of the gage 21 may be changed to accommodate different sized heels. The gages 31, 31, likewise shaped to engage the top lift, are mounted in a guideway 39 extending across the carrier at right angles to the guideway 29, and an adjusting screw, having a head 38 and provided with rightand left-hand threaded portions 4I, 4I is mount-ed in the carrier and connected to these gages in such manner that by turning the screw 38 the gages may be moved toward or away from each other. The'side gages are thus arranged to centralize the heel beneath the knife regardless of its.width.

In addition to these heel-locating gages, the machine is provided with heel-positioning means arranged to contact the front surface of the top lift' of the'heel, when the carrier is in itsloading position, and comprising twongers' 45, 45,' which are carried by an arm 41 forming part of a lever 49 secured to a pin 5I pivoted in a forwardly and upwardly extending arm portion of the casting 9. A spring |1| normally holds the lever 49 and its arm 41 in the position shown in Fig. 4 against an adjustable stop 48; The fingers 45, 45 are pivotally mounted in the rarm 41 on pins 46, 46 and are geared together as shown. Friction springs 50 bear on the fingers to hold them in adjusted position, see Fig. 2. The arm'41 has a portion 42 slidably mounted on the lever 49, and is adjustable thereuponby means of an ad# justing screw 40. A locking screw 44 is'arranged to clamp this arm in its adjusted position. These fingers may be brought together orseparated to accommodate diierent sizes of 'top lifts, and by manipulation of the adjusting 'screw 40 are positioned to contact the breast' surface ofthe particular size heel being breasted whenthe carrier is in the loading position and to orient 'the heel on the carrier with the back and side portions of its top lift in engagement with the gages 21 and 31, 31, which have beensuitably adjusted v previously. These'ngers 45, 45 overlie alcutting block 43, when the carrier is in the loading posi-V tion shown in Fig. 4 by the broken line outlines of the cutting block, gages 21, 31,1andf heel andvassure that the heel-will be properly positioned on the carrier.A f'

The wooden cutting block 43 is mounted ina recess on the upper surface of the carrier-,I Vand underneath it is an adjusting screw 36accessible through an opening 32, in the endV of' the carrier,

normally closed by a hinged cover 3|! held in closed position by a spring latch 34.V 'Ihe imprint of the knife on thisblock serves as a convenient visual guide for the operator .when setting the gagesabove mentioned, andthe heel-positioning means just described. As the cutting block becomes worn during use it may be elevated by means of the adjusting screwy 36and smoothed off. ush with the top of the carrier, and, when worn out, may be readily replaced. n The adjusting screw extends beneath thelower surface of the carrier, and a" clearanceslot 236`is provided in the casting9 to accommodatethe A'adjusting screw when the carrier is moved to breasting position.

Secured to the rotatable lstud |1, abovethe carrier |I, is a bracket I9 in which is vpivotedl at 51 an arm 55 carrying at its outer end a heelclamping claw 53. Connected to thisA arm by a ball end 59 is a rod 6|, threaded through a cro`ss pin. 63, see Fig. 3. The cross-pin is. journaledin spaced links 65, 65 arranged on opposite sidesof the rod 6|, and pivotally connected to the carrier by means of pivot-pins 61. Pivoted to these links is a bifurcated rod 1| connected at its outer end to an arm 13 of a lever 15, carried by the operating handle 23, by a nut 1D and a spring 12, interposed between the arm 13 and a washer Xed adjacent to the outer, end of the rod. The lever 15 is urged away from the operating handle by means of a spring 14, andaV spring A,62, see Fig. 1, is positioned betweenthe arrnw55 andthe upper surface ofthe carrier ,II` to elevate'fthef clamping claw 53 away from the heel when the clamping lever 15 is released. When the clamping lever 15 is moved to the position yshown in solid lines in Fig. 4 the rod 1|` is pulled to the left, from the position shown in Fig. 3, and the links 65 are swung downwardly about the pivot pins 61 carrying 'the pin 63` andflth'e rod 6| threaded thereto dwnwaidto'swing the arm 55 in a clockwise direction, 'as viewed in Fig'. 1, vand clamptheclaw 53 rmly against the heel H. A stop screw 19, see Fig. 4, limits the opening movement of the lever 15 andthe clamp claw 53 may be adjusted by turning rod 6l which is provided with a knurled head 69 for this purpose. As will be observed, the links 65, 65 operate in the nature of a toggle to increase the clamping effect.

',Ihe ejecting member |63 is mounted on the lever 49 by means of an extension |65 mounted in anenlarged head IBI of the lever. A spring |61 engages a nut |66 carried by the extension |65 in such a manner as to hold a pin |69, associated with the finger |63, in one of a plurality of apertures provided in the head |6I. By moving the finger |63 away from the head 16| suiciently to withdraw the pin, the finger may be indexed to'change its vertical position. I'he pin 5| on which the lever 49 ismounted carries at its lower portion a -catch projection |13, and the'carrier has onits forward end -a spring pawl member |15 for engaging the catch'projection, as the carrier is moved from breasting position to loading position, to swing the lever '49 about its pivot 5I and bring the finger |63 to the broken line position shown in Fig. 4 and against the heel toy eject it from the carrier into a chute |62. As will be observed, the'positioning fingers 45, 45 are at the 'saine time *withdrawn from heel-locating position to permitfsuch heely ejection, and the catch projection is arranged to slide' by the pawl just before, orwhen, the carrier 'reaches its loading position, whereupon the spring |1| returns the partsto thepositions shown in Fig. 4.

.The swingable carrier with itsoperating handle which is associatediwith the heel-clamping means enablesthe operator, with one hand, to

clamp the heel to thecarrier, to move the carrier to bring the heel under the knife forbreasting', and to return the carrier toits loading posif tion where the heel is automatically ejected. Thus, the operators other hand'vis free to load heels into the carrier and, since the machine is arranged 'for automatic operation of the mov# 'abile'control means,'the Iprocess of heel breasting maybe continued without abreak and at a speed lifnitedffor practical purposes, only by the ability of the operator to load heels on the carrier, a step rendered simple and easy to perform by the Aheelp'ositioning 'means vvand clamping means provided. lf'lsthe heel'isfsecurely clamped to the carrier by l'tl'fie'clamping ymeans and properly positioned thereon by the hell-positioning means, and since the carrier'isfalways returned to the same positionunder the knife by virtue of the carrier-loeating surfaces and themeans for keeping these locating surfaces clear of chips, `a high degree of accuracy and quality in the work done is attained. v A

,",Ih'e improved loading device, which has just been described, makes it possible to conveniently andv rapidly present heelsftothe breasting knife', without bringing the hands into dangerous proximity to the knifejand insures uniformly good results because of the accurate positioning, and firm clamping, of the heels on the'carr'ier. The operator is further safeguarded and the breast-v ing operationv additionallyv facilitatedA by the safety mechanism now to be described.

The power drive mechanism for" operating the knife is illustrated in Fig/'1 'andis lsimil'ar to the mechanism dis'closedin the "aforementioned patent to Bates.' As this mechanismfforms no part of the present invention, it` will 'not be 'described inA detail andV reference may be had tdthe aforesaid patent for such description. Inv the present arrangement the operating lever 210 (which corresponds to the operating lever 10 of the Bates construction) is extended outwardly through the frame I and pivotally connected to the lower end of the control rod |09. A tension spring connected to the frame and to the rod tends to move the rod downwardly to operate the power drive mechanism and cause a single reciprocation of the knife 4. The safety mechanism about to be described controls the movement of rod |09 and thus governs the operation of the knife as will now be explained.

-Referring to Fig. 4, a rod 83 having a rounded end is slidably mounted in bracket portions 8| forming extensions of the sleeve member 1, and mounted on one end of the carrier I I is a projecting flange 84 provided with an inclined and arcuate abutment surface 85. A spring 81, connected to a collar 89 pinned to the rod, and to the lower part of the projecting flange, holds the rounded end of the rod against the abutment surface. Interengaging surfaces on the collar and a part of the frame I prevent rotation of the rod. A downwardly extending pin 93, adjustably positioned in a slot 9| in the opposite end of the rod by means of a locking nut 94, projects into a slot 95 formed in the outer end of a lever 91 pivoted at 99 to a bracket member |22 secured to the frame, see Fig. 5. This lever has an extended portion carrying an abutment surface I0| which is positioned beneath an abutment surface |03, carried by a lever pivoted to the bracket |22 on a pivot pin |35, when the carrier is moved from breasting position and the rod 83 shifted to the right from the position shown in Figs. 1 and 4 to the position shown in Figs. 5 and 6. The control rod |09, which upon downward movement operates the power-drive mechanism to cause a single reciprocation of the knife 4, is connected toV the outer end of the lever |05 and movement of this rod is blocked when the abutment I0| is beneath abutment |03.

Referring to Figs. 4, 5 and 6, the lever |05 carries a latch pin III projecting toward the back of the machine and provided with a latch surface I I3. Pivoted to a lever I I9, see Fig. 6, journaled on the bracket |22 at |20, is a depending latch I5 having a latch surface I|I4 for engaging the latch surface |I3 of the latch pin I I I. A spring |21 tends to hold these latch surfaces in engagement. At its outer end the lever II9 is provided with a bearing surface |2| which rides on a roller |23 journaled on a pin |25 carried by a collar |24 associated with a driving rod |26 for the slide 3.

II9 swings about its pivot |20. Mounted on the lever 91 is a second latch |29 arranged to catch the lower extremity of the first-mentioned latch II5, in the manner shown in Figs. 5 and 6, in which position it is normally held by means of a spring I 3|. The latch |29 also is provided with a tripping screw |33 adapted to contact a surface |34 on the bracket |22 when the lever 91 is moved to release the lever |05, as will be presently explained. Y

In Figs. 1 and 4 the parts are shown in the positions assumed when the carrier is in its breasting position, but before the control rod |09 has been moved to operate the power drive mechanism, while in Figs. 5 and 6 the parts are shown in the positions assumed after the carrier is moved from breasting position to loading position and the rod 83 shifted to the right by the abutment surface 85. As shown in the latter figures, the abutting surface IOI of the lever 91 As the slide is reciprocated the lever is beneath the `surface |03 of the lever |05, and the control rod |09 is thus blocked against downward movement to operate the clutch. Also, the latch |I5 now holds the lever |05 against movement to lower the rod |09. As the carrier is moved from loading position toward breasting position the rod 83 is moved to the left by the spring 81 and the lever 91 is swung in a clockwise direction, as viewed in Fig. 5, during which swinging movement the latch |29 removes the latch II5 from beneath the pin yI I I, thus freeing theY lever |05 for downward movement with the control rod when the surface IDI passes beyond the surface I 03. By adjusting the pin 93 along the slot 9| in the rod 83, this releasing of the control rod is timed to occur just when the carrier reaches its breasting position as determined by the locating surfaces 11 and 80. The center of curvature of the abutment surface 85 is coincident with that of the guiding surface I 3 so that angular adjustment of the carrier will not change this timing relation.

Upon being released the control rod moves downwardly, under the action of spring means IIO, Fig. 7, operating the power drive mechanism 4of the machine to cause a single reciprocation ofthe knife to breast the heel. As the lever 91 reaches the end of this swinging movement by the carrier I|,the latch |29 is moved, by the engagement of its tripping screw |33'with lsurface |34, to let go of the latch I|5, thus permitting it to swing back against thehpin III. Because of the now lowered position of the pin I I the latch I I5 does not latch, but instead, strikes the pin above its latch surface |I3. During the reciprocation of the knife the lever II9 turns about its pivot |20 to lower the latch |I5, and upon the return movement of the slide, the pin II is engaged by the latch II5 and the lever |05 and rod |09 restored to their original positions at the completion of the breasting cycle. While the knife is operating the lever |05 is in its lowered position, and cooperating surfacesl |35 and I 31 on the lever |05 and the lever 91 prevent return movement of the lever 91. rigidly connected to this lever and also bears against the abutment surface 85, the carrier is locked in its breasting position during this period. As the carrier is swung to loading position the rod 83 is shifted to the right to reset the lever 91 in blocking position with its abutment surface IOI beneath the surface |03 and with the latch |29 catching hold of the latch II5, as shown in Fig. 5.

Pivoted on trunnions |19 carried by the frame I is the knife guard |11, which is arranged to substantially surroundthe knife 4, and depending therefrom is a rod |8| which is arranged to be moved in a downward direction when the guard is raised against a stop to expose the knife. The lower end |82 of the rod I8I is guided by a projecting 4bracket |38 formed on the end of the pivot1 pin |36 so as to'rnove across the path ofthe lever 91. As will be seen fromFigs. 1 and 4, this lever blocks the downward` movement of the rod when the carrier is in breasting position and the control rod |09 has been released for operation of the knife. i It will also be observed from Figs. 5 and 6 that, when the guard is raised and the rod I8I lowered to the dotted-line position shown in Fig. 6, movement of thelever 91 sufcient to release the control rod |09 is prevented. Thus it is impossible to raise the guard while the knife is operating or to operate the knife while the guard is raised.

Since the rod 83 is Yof an arm |45 keyed to a shaft |41.

Movement of the carrier from breasting position also effects a clearing of chips from the cutting block 43 and from the carrier-locating surfaces by the following mechanism. Mounted on the machine frame at the left-hand side, as viewed in Figs. 1 and 7, is the pneumatic device |39 comprising a cylinder |40, enclosing a springoperated piston 250, and provided with air ducts |58 and |60. An operating and latching rod |53, pivoted to the piston and urged toward latched position by a spring 252, is connected to the power drive by a hinged rod |51. The lower end of this rod extends through a rounded opening 253 in a projecting arm 24|.on a connecting rod 240. As the arm 243| descends, during the breasting operation, it engages an adjustable abutment |50 on the rod |51 and pulls the latching rod down to the position shown whereupon a shoulder 254 on the rod |53 latches on one edge of an opening 255 in the cylinder |40.

Secured to the rod 83, by means of a clamp |43, is a connecting rod |4| pivoted to the end At the opposite end of this shaft is a projection |49 carrying a tripping screw |5|. When the carrier is returned from breasting position to loading position the lever |69 is swung by the movement of the rod 83, causing the tripping screw to engage the latching rod and release the springoperated piston to blow blasts of air through the ducts |58 and |60. These ducts are arranged to direct the air blasts to clean the cutting block 53 and to clear the surface 80 of chips or cuttings, see Fig. 1, thus assuring that the carrier will be returned to the same position under the knife at each operation of the machine and that the block will be kept free of chips.

Having describedthe invention, what We claim as new and desire to secure by Letters Patent of the United States is:

1. A machine for operating on shoe parts comprising a power-operated reciprocating tool, control `means movable to cause operation of said tool, a work carrier movable to a loading position 'remote from the tool and to an operating posi- `tion beneath the tool, and means associated With said carrier and said control means operating to block movement of the control means when the carrier is in said loading position and to release the control means for movement to cause operation of the tool when the carrier is in said operating position.

2. A heel-breasting machine comprising a power-operated reciprocating knife, control means movable to cause a single reciprocation of the knife by its power-operating means, a heel carrier movable to a loading position remote from said knife and to a breasting position beneath the knife, and means associated With said carrier and said control means operating to block movement of the control means when the carrier is in loading position and to release the control means for movement to cause reciprocation of the knife when the carrier is in breasting posi- Y tion.

Vcarrier swingable to a loading position remote from said knife and to a breasting position beneath said knife, means for blocking movement of said control means when said carrier is in loading position, and means operableby said carrier for moving said blocking means to releasesaid control means when the carrier is in breasting position. Y.

4. lA heel-breasting machine comprising a power-operated reciprocating knife, a control means movable to cause a single reciprocation of the knife by its power-operated means, a heel carrier movable to a loading position and to a breasting position, means for blocking movement ofsaid control means when said carrier is in loading position, means operable by said carrier for moving said `blocking means from blocking position to release said control means for movement to cause operation of said knife when the carrier is in breasting position and for returning said blocking means to blocking position when the carrier is moved-to loading position, and means associated with said knife for restoring said control means to its original position, at the termination of the operation of the knife, so that said blocking means can be returned to blocking position.

5. A machine for operating on shoe parts comprising a power-operated reciprocating tool, a control means movable to cause a single reciprocation of the tool by its power-operated means, a

.work carrier movable to a loading position and to an operating position, means for blocking movement'of the control means when the carrier is in loading position, means operable by the carrier for moving the blocking means from blocking position to release said control means for movement to cause operation of the tool when the carrier is in operating position and for returning said blocking means to blocking position When the carrier ismoved to loading position, and means associated with said tool for restoring said control means to its original position, at the termination of the operation of said tool, so that said blocking means can .be returned to blocking position. Y

6. A machine for operating on shoe parts comprising a power-operated reciprocating tool, a control means movable to cause operationof said tool, a Work carrier movable to a loading position remote from said tool and to an operating position beneath said tool, and means associated with said control means operating to prevent movement of said carrier from operating position when saidcontrol means is moved to effect operation of said tool.

7. A heel-breasting machine comprising a power-operated reciprocating knife, a control means movable to cause operation of said knife, a heel carrier movable to a loading position remote from said knife and to a breasting position beneath the knife, and means associated with said control means operating to prevent movement of said carrier from breasting position when said control means is moved to effect operation of said knife.

`3. A heel-breasting machine comprising a power-operated reciprocating knife, a control means movable to causeoperation of said knife, a heel carrier movable to a loading position and to a breasting position, means for blocking movement of said control means When said carrier is in loading position and for releasing said control means When said carrier is in breasting position, andmeans associated with said carrier, said control means and said blocking means for preventing movement of said carrier when said control means is moved to cause operation of said knife.

prising a power-operated reciprocating tool, ccntrol meansmovable to cause a single vreciprocation of said tool, a work carrier movable from a loading position to an operating position, a guard substantially*surrounding said tool and movable to 4expose said tool, and means associated with said guardand said control means operating to prevent movement of said-guard to expose said tool when said control means is moved and to prevent movement of the control means when said guard is moved to expose the tool.

10. A heel-breasting machine comprising a power-operated reciprocating knife, control means movable to cause a single reciprocation of said knife, av heel carrier movable from a loading position kto a breasting position, a guard sub-2113 stantially surrounding said knife and movable to expose said knife, and means associated with -said guard and ysaid control means operating to preventmovement of Isaid guard -to expose said knife-when said-control meansis moved and torzzu prevent movement of the control meanswhen said guard is moved to expose the knife.

ll. A heel-breasting ymachine comprising a power-operated reciprocating knife, a control means movable to cause a single reciprocation of gs said knife, a heel carrier movable to a loading position and toabreasting-position, a removable guard forsaid knife,V means operable by said carrier to block movementiof saidvcontrol means when the carrier is in loading position and to rel 3o lease said control means when said carrier is in breasting position, and means associated with sitiOn, a guard substantially enclosing said knife and arranged for movement away-from said knife, and safety mechanism associated with-saidpyfi.

control means and operable by movement of said carrier to block said control means when the carrier is in loading lposition and to release thecontrol means when the carrier is in breasting position, said safety mechanism including meanspf for locking said guard against movement away from said knife when the knife is operating and forpreventing the release of the control means when said guard is moved away from said knife, said safety mechanism also` acting to lock said-:55 carrier in breasting position while said knife is operating.

13. A. machine for operating on shoe parts comprising a power-operated` reciprocating tool, a control means movable to cause a single recipro,v cation of said tool, a work carrier movable between a loading position and an operating position, a pivoted tool guard adapted to be raised to expose said tool, safety mechanism associated with said control means and constructed and ar-,- ranged to block movement of the control means when said carrier is in loading position and to release the control means when the carrier is in operating position, said safety mechanism also acting to prevent movement of the carrier from op-` `erating position While the tool is operating and control means when the guard is raised,- means. 75ticonnected to said tool for restoringl said control means to its original position after the completion of a single reciprocation of theY tool, and means acting upon the return of said carrier to loading position after: said tool has beenoperated to reset said safety mechanism in initial position.

14. A heel-breasting machine comprising a power-operated reciprocating knife, a control means movable to cause a single reciprocation of said knife, a heel carrier movable to loading position and to breasting position, a pivoted knife guard adapted to be raised to expose said knife,

.safety mechanism associated withvsaid control means and constructed and arranged to block movement of the control means when said` carrier is in loading position and to release lthe control means when the carrier is in breasting position, said safety mechanism also acting to prevent movement of the carrier from breasting position while the knife is operating and including means arranged to lock the guard against movement to expose the knife when the knife is operating and to prevent operation of the knife by the control means when the guard is raised,

means connected to said knife for restoring said control means to its original position after the completion of a single reciprocation of the knife, and means operable upon the return of said carrier to loading L, position after said knife has been operated to reset said safety mechanism in position to block operation of said control means.

15. A heel-breasting machine comprising a `power-operated reciprocating knife, a heel carrier movable between a loading position and a breasting position, a control rod for said knife movable to cause a single reciprocation of said knife, safety mechanism associated with said Vcontrol rod and having a lever normally positioned to block movement of said control rod, and means operated'by saidcarrier when in breasting position to move said lever from blocking position to release said control rod.

16. A heel--breasting machine comprising a power-operated reciprocating knife, a heel carrier movable to a loading position and to a ,breasting position, a control rod for said knife power-operated reciprocatingbreasting knife, a

heel carrier movable between a loading position and a :breasting position, a control rod -movable to cause operation-of said knife, safetymechanism associated IWith said control rod land including a pivoted lever operable by said carrier to block said control rod when the carrier is in loadingposition and to release said control rod when the carrier is in breasting position, a removable guard for said knife, and means carried by said guardconstructed and arranged to ystrike .said lever and prevent removal of said guard when the lever has-released said control rod and to prevent movement of 'the lever by said'carrier to-release said control'rod when said guard isremoved to .exposesaidkniifeI 18. A heel-breasting machine having-,in combination, al reciprocating knife, yafcontrolrod.

movable to operate said knife,a heel .carrier shiftable between a `loading position and .a breasting position, and. safety mechanism for: controlling movement of said rodcomprising a lever connected to said rod and having a latchA pin,v a second lever operable by said carrier-to block movement of said. first lever when said carrier is in loading position and to release said rst lever when saidcarrieris inv breasting position, said first. and secondvlevers having inter. engaging surfaces `for locking said carrier in breasting position when `said first -lever is released, laV third lever yarranged 'tobeV swung yupwardly by said knife atthe completion of its reciprocationand having a latch yengageable lwith said-latch pin, a second latch carried bysaid second leverwconstructed and arranged to withdraw said i-lrst latch as said second lever is operated to release said rst leverand to let goof said rst latch'when the first lever has been released,` and means for returning saidv rst latch to latching position with respect to said latch pin so that said iirst lever willbereturned to its original position by said third leverat the completion of the reciprocation of said knife.

19. A heel-breasting machine comprisingv a framegapower-operated reciprocating knife, a control means for said-knife, acarrier for loose heels, having heel-clamping and heel-locating means associated therewith mounted on said frame for swinging movement about an .axis parallel tothe direction of movement of said knife alternately to and from a loading position remote from said knife and a breasting position beneath said knife, and manual means for moving the carrier. 1 c

20. A heel-breasting machine having, in combination, a frame, a power-operated reciprocating knife, acontrol .means for said knife,'a supporting member carried by said frame, and a heel carrier pivoted to said supporting member for swinging movement about an. axis parallel to the direction of movement of said knife'from a loading position remote from saidknife to a breasting position beneath said knife, said carrier and said supporting means being provided with cooperating locating surfaces arrangedl to arrest swinging movement of said carrier when it has reached breasting position. i

V21. A heel-breasting machine having,` in combination, a frame, a power-operated reciprocating knife, a control means for said knife, a supporting -member carried vby "said frame, a heel carrier pivoted to said supporting member for swinging movement about an axis parallel to the direction of movement of said knife from a loading position remote from said knife to a breasting position beneath said knife, said carrier and said supporting means being provided with cooperating locating surfaces arranged to arrest swinging movement of said carrier when it has reached loading position, and means for removing chips from lsaid cooperating locating surfaces as said carrier is being returned to loading position after said knife has operated.

22. A heel-breasting machine having, in combination, a frame, a power-operated reciprocating knife, a control means movable to cause operation of said knife, a heel carrier pivoted on said frame for movement to and from a loading position remote from said knife and a breasting position beneath said knife, and means for locking said carrier in said breasting'position during operation of the knife comprising an-element en"- gaging said carrierand held against movement by said control means when the control means is moved to cause operation of said knife.

23.` A heel-breasting lmachine having, in combination, areciprocating breasting knife, a heel carrier mounted for swinging movement alternately to and from a loading position remote from said yknife and a breasting position beneath said knife, manual means for moving the carrier, and meansoperated by said carrier as it is swung from breastingr position to loading position for ejecting the heel from said carrier.

24. A heel-breasting machine having, in combination, a reciprocating breasting knife, a heel carrier mounted for swinging movement alternately to and from a loading position yremote from said knife and to a breasting positionbeneath said knife, manual means for moving the carrier, a heel-ejecting device comprising a pivotally mounted arm constructed and arranged when swung about its pivot to strike a heel on said carrier, interengaging means on said carrier and arm operable to swing said arm to eject the heel as said carrier is moved from breasting position toloading position, said means operating to release said arm when the carrier reaches loading position, and means for returning said arm to its original position.

25.v A heel-breasting machine having, in combination, a power-operated reciprocating knife, a heel carrier mounted for movement to a loading position remote from said knife and Ito a breasting position beneath said knife, manual means for moving said carrier, and means associated with said manual means for holding a heel o n said carrier during movement thereof and while said heel is being breasted by the knife.

26. -A heel-breasting machine having, in combination, a power-operated reciprocating knife, a heel carrier pivotally mounted `for swinging movement to a loading position remote from said knife and to a breasting position beneath said knife, a handle for moving said carrier, and ,a heel clamp on said carrier comprising a clamp arm and an operating means therefor, said operating means including a member associated with said handle and having a mechanical advantage connection with said 1clamping arm,y said operating means and said handle beingconstructedv and arranged for operation with one hand to clamp a heel on ,the carrier and to effect movement of said carrier.

27. A heel-breasting .machine having, in cornbination, a frame, a power-operated reciprocating knife, a heel carrier swingable between a loading position remote from said knife and a breasting position beneath said knife, heel-locating gages associated with said carrier for locating a heel thereon, and heel-positioning means arranged to contact the breast surface of the top lift of the heel when said carrier is in loading position.

28. A heel-breasting machine having, in combination, a frame, a power-operated reciprocating breasting knife, a heel carrier swingable between a loading position remote from said knife and a breasting position beneath said knife, heellocating gages on said carrier arranged to contact the back and side portions of the top lift of a heel placed on said carrier, and a plurality of adjustable fingers mounted on said frame for engaging the breast surface of the top lift when said carrier is in loading position for positioning the top lift against said locating gages.

29. A heel-breasting machine having, in combination, a frame, a power-operated reciprocating breasting knife, a heel carrier swingable between a loading position remote from said knife and a breasting position beneath said knife, heellocating gages on said carrier arranged to contact the back and side portions of the top lift of a heel placed on said carrier, a plurality of adjustable fingers for engaging the breast surface of the top lift when said carrier is in loading position for positioning the top lift against the locating means, and a heel-ejecting device mounted on said frame, said adjustable ngers being associated With said heel-ejecting device and movable out of the Way of the heel when the device is operated to eject a heel from said carrier.

30. A heel-breasting machine having, in combination, a support, a breasting knife, a heel carrier movable on the support to a loading position remote from said knife and to a breasting position beneath said knife, an operating handle on said carrier, adjustable gages on said carrier for engaging the back and side portions of the top lift of a heel, means on the support for engaging the breast surface of the top lift for orienting the heel on the carrier when said carrier is in loading position, and means for clamping the heel on the carrier, said last-named means being associated with the carrier-operating handle in such a manner that the operation of clamping the heel and moving the carrier from loading position to breasting position may be accomplished by one hand.

31. A heel-breasting machine having, in combination, a frame, a breasting knife, a heel carrier mounted on said frame for movement to a loading position remote from said knife and to a breasting position beneath said knife, operating means for said carrier, heel-locating gages on said carrier and a heel-locating device mounted on said frame and arranged to contact the breast surface of the top lift of a heel on the carrier when said carrier is in loading position, heelejecting means associated with said heel-locating device and arranged to be operated by said carrier as it is moved to loading position from breasting position, and means for clamping a heel to said carrier, said clamping means being associated with the operating means for said carrier and said heel-locating device being movable out of the Way of the heel when said ejecting means is operated. I

32. A heel-breasting machine comprising a power-operated reciprocating knife, a control means movable to cause operation of the knife, a heel carrier movable to a loading position remote from the knife and to a breasting position beneath the knife, said carrier having heellocat-ing gages and provided with manual means for clamping a heel and for moving the carrier, and a safety mechanism associated with said carrier and said control means and constructed and arranged to block movement of the control means when the carrier is in loading position, to release the control means when the carrier is in breasting position and to lock the carrier in breasting position when the knife is operating.

33. A heelbreasting machine comprising a power-operated reciprocating knife, a v control means movable to cause operation of the knife, a heel carrier movable to a loading position remote from the knife and to a breasting position beneath the knife, said carrier'being provided with heel-locating gages and having manual means operable to clamp a heel and to move the carrier, a heel-ejecting means operableby the carrier and having means for positioning a heel against the gages when the carrier is in loading position, and a safety mechanism associated with said carrier and said control means and constructed and arranged to block movement of the control means when the carrier is in loading position, to release the control means when the carrier is in breasting position and to lock the carrier in breasting position when the knife is operating.

34. A heel-breasting machine comprising a power-operated reciprocating knife, a control means movable to causev operation of the knife, a removable guard for said knife, .a heel carrier movable to a loading position remote from the knife and to a. breasting position beneath the knife, said carrier having heel-locating gages and being provided with manual means for clamping a heel and for moving the carrier, a safety mechanism associated with said carrier, said control means and said guard and constructed and arranged to block movement of the control means when the carrier is in loading position, to release the control means and prevent removal of the guard when said carrier is in breasting position, and to lock the carrier in breasting position when the knife is operating, and means carried by said guard arranged to prevent release of the control means when the guard is removed to expose said knife.

FREDv RICKS.

WILLIAM ARTHUR BARKER.

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