US1461085A - Machine for operating on shoe bottoms - Google Patents

Description

" ufiy w, 1923.

E. ERICKSON MACHINE FOR OPERATING 0N SHOE BOTTOMS Filed April 15. 1918' 6 Sheets-Sheet 1 July 10, 1923. JMWLMS E. ERICKSON MACHINE FOR OPERATING ON SHOE BOTTOMS Filed April 15, 1918 e Sheet-Sheet 2 July 10, 1923.

' E. ERICKSON MACHINE FOR OPERATING ON SHOE, BOTTOMS 6 Sheets-Sheet 5 1 l v I i 1x; 6% f I 34% L guujul July 10, 1923 Il,4 $1l,85

E. ERICZKSON MACHINE FOR OPERATING 0N SHOE BOTTOMS Filed April 15,-1918 5 Sheets-Sheet 4 JuiyJO, 1923.

E. ERICKSON MACHINE FOR OPERATING 0N SHOE BOTTOMS' Filed April 15, 1918 s Sheets-Sheet e HAGIWSS Patented Juiy 10, 1923.

j V" i I ,1 r i., 1.

EDWARD ERICKSON, F BEVERLY, MessncH sE'r'rs, AssIGNon TO UNITED srrpn MACHINERY oonron'e'rron, on PATERSON, new Jne's'EY, A conronarroivor new JERSEY.

MACHINE non OPERATING on sites Boai'roMs.

iipplication'filed April 15, 1918. Serial No. 228,544.

7 '0 all whom it may con-067%:

Be it known that I, EDWARD ERIOKSON,

' a citizen ofthe UnitedmStates, residing at Beverly, in the county of Essex and State of Massachusetts, have invented certainpnew and useful Improvements in Machines for .Operating onv Shoe Bottoms; and I do hereby declare the following to be a full, clear,

and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates toma'chines for operating on shoebottoms, and is designed primarily as an improvement on the, welt butting machine disclosed in United States Letters Patent No. 1,373,553, ranted April 5, 1921, on my application, although the several features of the invention are also applicableto other machines of this general. class.

One of the objects of the invention is to improve and simplify the construction and operation of the machine .of the above menduringtheir cutting strokes .and are then ralsedtrom the work and returned to their initial positions.

I Another featureofthe invention comprises the independent mounting of the cutters and their actuating'linkage mechanisms upon the swinging frames of the machine and the independentuhiversal connections of the cutter supportingarms to the crank-shaft of the machine, whereby the respective actuatinglin'kage mechanisms may beswung freely with said swingiiigtrames.

An improved clutch mechanism herein sho wii'and described but not claimed, since it is of general utility whether or not embodied in a welt butting machine, is claimed in an applicationSerial No. 279,351, filed February 26, 1919, by the present inventor as a-divisional of thisia-pplication.

These. and other objects of the invention and features by whichthey are attained will becomeyapparent .to those skilled in the art fromthe following description and accompanying drawings of the preferred embodiinent ot .the invention, in which Figure l is a view in front elevation of a portion of a machine constructed in accordance with .the present invention; F ig; 2 is a view,.partially in vertical section and partially in leftside elevation, of the machine shown in' 1, the section being taken throughthe clutch; Fig. 3 is a view, partially in side elevation and partially in section on the line 33 of 1, showing. particularly the operating mechanism of the machine; Fig. 4 is'a view, partially in plan and partially in horizontal section, of the machine shown in Fig. 1, the section being taken through the clutch; Fig, 5 is a view in front elevation .of the clutch, certain parts being shown in vertical section for the sake of clearness; Fig. 6 1s a v1ew, part1ally in section and partially in right side elevation,

of the clutch; Fig. 7 is a horizontal sectional view of the clutch similar to that of Fig. i and showing the manually operable disconnecting key in its released position; Fig. 8 is aview', partially in side elevation and partially in vertical section, and on an enlarged scale, of a portion of the apparatus, shown in Fig. 3; Fig, 9 is aview in front elevation of the apparatus shown in 8; Fig. 10 is a plan view of the welt supporting plate and guard; and Fig. 11 is a view, partially in side elevation and partially in section of the mechanism for supporting and actuating one of the welt-butting cutters, the p'athof move- .ment of the cutter being indicatedin dotand-dash lines, and a shoe, which has just been operated upon and which is sectionedthrough the welt and outside the inseam, being shown in order to set forth the relationship of the welt support and guard, with respectto those portions of the shoe with which they cooperate. y

In the-preferred embodiment of th mvention illustrated in the drawings, the machine comprises in general, a column or standard 12 having a rectangular head 14 for supporting the various parts of the operating mechanism; a plurality of pivotally mounted or laterally swinging frames 16 and 18, each of which is provided with a welt support or crease finder 20 for engaging the crease of a welted unsoled shoe beneath the ends of the welts, whereby the shoe and the ends of the welt are supported; an adjustable back-gage 22 against which the heel of the shoe is. placed for determining the longitudinal position of the shoe with respect to the welt supports; a plurality of movable welt-butting cutters or knives 24 and 26 for scarfing or beveling the ends of the welt; a mechanism for actuating the one ters and including movable supportingarms 28 and 30 upon which the cutters are respectively mounted; a mechanism for swinging in the frames 16 and 18 to cause the Welt supports or crease finders 20 to engage the creases and support the shoe and welt ends, said mechanism including a treadle 32, whereby theoperation of the machine is controlled; a locking device including a rod 34 and clamping arm 86 for locking the swinging frames with the welt supports 26 in position in the crease of the shoe during the welt-butting operation; a one-revolution clutch 38 for connecting and disconnecting the crank-shaft of the mechanism for actuating the cutters to and from the power shaft; and means under the control of the operator, including a stop-releasing finger 40 that is operated by the treadle 32 for controlling the operation of said clutch.

Power is continuously supplied to the machine from a suitable source by means of a pulley 44 (Figs. 2 and 4) which is fixed to a shaft 46 journaled in a casing 48 that en closes the clutch 38 and is secured to one side of the rectangular head 14 of the main supporting column 12. The shaft 46 is provided with a worm 50 that cooperatively engages a worm-gear 52 that is loosely mounted upon a shaft 54 extending transyersely across the machine and having bearings suitably supported by the head there of. This shaft 54 is normally idle and may be connected to the continuously driven worm-gear 52 by means of the clutch 38.

An offset crank 56 is provided on the shaft 54 intermediate the sides of the rectangular head 14, for the purpose of actuating the welt- butting cutters 24 and 26 as will herelnafter appear.

During the welt-butting operation, the shoe is supported and positionedvertically by means of the welt supports or crease finders 20 which are carried by the swing-- mg frames 16 and 18, and which, in the id ward positions of said frames. are inserted into the welt crease at each side of the shoe substantially at the ends of the inseam.

shown in Fig. 11.

The swinging frames 16 and 18 (Figs. 1, 3 and 4) are disposed within the rectangular opening of the-machine head 14 and are pivotally mounted above and below upon studs 60 and 62 to swing in a horizontal plane. The swinging frames 16 and 18 are of like construction, and each projects forwardly and is provided with. one of the inwardly projecting welt supports 20 and with a guard-plate 64 that is adapted to rest upon and protect the folded-in edges of the upper during the welt-butting operation, as shown in Figs. 4 and 11.

Referring particularly to Figs. 8, 9 and 10, the welt support 20 is adjustably mounted in a curved dove-tail slide 66 in the body portion of the guard-plate 64. support 20, therefore, may be adjusted to any desired inclination with respect to the guard-plate 64, and this inclination determines the length of the bevel or scarf produced by the welt- butting cutters 24 and 26 upon the ends of the welt. The body portion of the guard-plate 64 is provided with a pin 68, by means of which the associated welt support 20 and guard plate 64 are adjustably mounted on the nose 70 of the swinging frame 16, a binding bolt 72 being employed to clamp the pin 68 rigidly in position.

The shoe to be operated upon is positioned longitudinally for properengagement with the welt support 20 by means of the adjustable back gage 22 (Figs. 1 and 4) which may be adjusted as desired by a suitable locking handle 76. The back gage 22 and its adjustable locking handle 76 form no part of the present invention, except as they perform certain necessary functions in definitely locating and supporting the shoe while being operated. upon, and since the specific structural details and mode of operation thereof are fully set forth in the above mentioned patent. to which reference has already been made, no description thereof is deemed necessary.

The welt-butting cutters or knives 24 and 26 are alike and are adjustably supported at the forward ends of the respective supporting arms 28 and 30 (Figs. 3, 4, 8 and 11), by means of which the cutters are actuated. Each cutter or knife is clamped into a suit able angular recess in the lower portion of an adjustable block 80 (Figs. 8 and 9) by -means of a clamping bolt 82 and finger 84 which cooperates with the stem of the cutter and holds it firmly in position.

In order to smooth out and hold down the welt in advance of the cutter and to pull any tacks that may accidentally be left in the shoe in the path of the cutter a presser foot 86 is positioned ahead of the cutter,'and projects laterally from a shank 88 that is slidably mounted in a guideway in the block 80. The shank 88 is provided with a pin 90 The welt arm 28 and is provided with an integral collar 102 ;that projects into side recess, in the block 80. By screwing the adjusting screw 100 in or out, it is evident that the block is caused to be lowered or raised, whereby the desired setting ofthe knife 24 is accomplished. Haying suitably set the knife, the

adjustment thereof is retained by means of a clamping bolt 104 that binds the split portions of the lower end of the arm 28, upon thedove-tailed portion of the block 80. The arm 28 which supports the cutter 24 is" also adapted to effect its actuation, where by the cutter is moved in a substantially straight line during its cutting stroke, and

is subsequently raised from the work and returned to its initial position in a curved path. In order to accomplish this operation, the arm 28 is supported between its ends upon in-oscillatory link 108 (Figs. 3, 4 and 11), one end of which is pivotally connected to the arm 28 and the other end of which i has a pivotal connection to the swinging frame 16. The end of the arm 28 opposite the cutter 24 is bifurcated and has a substantially. universal connection to the crank 56 of the shaft 54, through the agency of which the arm is permitted to'swingwith the swinging frame 16011 which it is mounted. The universal connection just referred to comprises a pair of bearing blocks 110 that cooperate with and surround the offset crank 56 and which are positioned between the spaced members of the arm28 and ivotally secured thereto by a bolt 112. The

crank. 56 is thereby permitted to rotate with respect to the blocks 110, while the arm 28 .is pivoted in a horizontal plane upon the bolt 112 so that it may accommodate itself to the position of the swinging frame 16. The arm 28 is restrained and guided in its movements by means of a plate 114that is secured to the inside of the swinging frame 16.

The relative proportions of the arm 28. the oscillatory link 108 and the'crank 56 are so chosen that as the crank 56 is rotated at the'time the swinging frames are in their operative positions against the shoe, thewelt-butting cutter or knife24 is drawn in substantially the plane of the guard-plate 64 during the cutting stroke, whereby the ends of the'welt-upon'the relatively inclined welt supports 20 are scarfed or beveled, after which the cutter is raised from the work and returned to its initial position in a curved path, which closely approximates a portion of an ellipse, as shown in Fig. 11.

The forward ends of the swinging frames 16 and 18 are normally held apart, as shown in Fig. 1., by means of a spring 118, the ends of which are attached to pins projecting from the rear ends 120 and 122 of the respective frames 16 and 18. In order that the two swinging frames may move concurrently and through equal distances, they are provided with intermeshing toothed segments 124 and 126 (Figs. 1, 3 and 4) respectively, through which the lower pivot bolts 62 project.

The forward ends of the swinging frames 16 and 18 are brought together in position to cause the welt supports 20 to engage the crease and' support a shoe for the operations to be performed thereon by a treadle mechanism. This mechanism comprises the treadle- 32 (Fig. 2) which is pivotally mounted upon a shaft 128 at the lower end of the Support ing column 12 and which is connected by a treadle rod 130 to the forward end of a substantially horizontal bifurcated arm 132 (Figs. 1, 2, 3 and 4). The arm 132 is pinned to'a' rock-shaft 134 (Fig. 3) that extends laterally of the machine and is suitably journaled just beneath the rectangular head 14 of the column 12. The arm 132 is provided with a socket to receive one end of a spring 136, the other end of which is seated in a socket provided on a lever 138, the bifurcated portions of which are loosely mounted upon the rock-shaft 134. In order to prevent the spring 136 from spreading apart the arm 132 and the lever 138 and dropping out, said arm and lever are respectively provided with shoulders 137 and 139 which cooperate to limit the spreading movement. Ther'ear end of the loosely mounted lever 138 is providedwith a socket head 140 which is adapted to receive the inner ends of a pair of upwardly and outwardly inclined; struts or rods 1-12 which extend between the head and sockets 144 formed at the rear ends120 and 122' of the swinging'framesltl and 18.

The treadle 32 is normally held in its raised position by means of a spring 146 that is connected to the column 12,-whereby the spring 136 is normally uncompressed. as shown in Fig. 2. When the treadle 32 is depressed, the lowering of the treadle rod 130 operates through the arm 132 and the spring 136to raise the rear end of the loosely mounted lever 138, whereby the inner ends of the struts or rods 142 are raised; The struts are thereby brought into position approaching alignment, and consequently the rear ends 120 and 122 of the swinging frames 16 and 18'are forced apart in opposition to the tension of the spring 118. This outward movement of the rear ends of the swinging frames causes corresponding inward movements of their front ends and brings the welt supports 20 into the welt crease of the shoe which has-previously been placed with its heel against the back gage 22 and. which is held by the operator at a proper height.

1f the forward. ends of the swinging frames 16 and 18 were always allowed to be opened to their fullest extent by the spring 118, a considerable inward movement would be required to cause the welt supports 20 to properly engage shoes of narrow widths. In order to obviate th necessity of such an extensive movement, an adjustable stop .150 (Figs. 1 and 4-) is provided for limiting the outward movement of the forward ends of the swinging frames. This stop 150 is screw threaded through a lug upon the head 14- of the column 12 and. is provided with a handle 152 by vhich it may be conveniently turned. The end of the stop 150 is adapted to engage the side of the swinging frame 18 to limit the outward movements of the articulated frames 16 and 18.

It will be observed that upon depressing the trea-dle 32, only so much pressure can be placed upon the welt crease by the crease finders or welt supports 20 as is permitted by the strength of the spring 136, for as soon as the pressure equals the strength of this spring, said spring will begin to yield without further movement of the lever 138 or further straightening of the toggle formed by the struts or rods 1 12. The strength of the spring 136 may be varied as desired by adjustingathreaded block 154. (Fig. 3) to suit the Characteristics of the material of the shoe which is being operated upon.

Continued depression of the treadle will, however, continue to rock the shaft 134. which movement is adapted to throw in the clutch 38 and set in motion the driving mechanisms for operating the welt-butting cutters 24 and 26. Referring particularly to Figs. 2 3, 41, 5, 6 and 7, the construction and operation of the clutch 38 will be described.

The clutch comprises two cooperating rel atively movable members 160 and 162 and a rotatable pin 164, by means of which said members are connected and disconnected. The clutch member 160 comprises a disk that is rigidly secured to the gear wheel 52 by screws 166 and is provided with a recess 168 having a. plurality of shoulders 170 for a purpose to be set forth. The clutch member 162 constitutes a disk having an integral hub 172 which surrounds and is detachably connected to the shaft 5 1 and which is provided with a boss 174: having a longitudinal recess to receive the rotatable pin 16 1.

One-half of the outer extremity of this pin is cut away to provide a semi-cylindrical projecting portion. Said pin is normally biased or held in the position shown in Fig. 6 by means of a coiled spring 176 that is disposed within a recess in the clutch member 162, one end being attached to said part and the other end to a pin that projects laterally from the rotatable pin 16%. With the rotatable clutch pin 16 1 held in the position shown in Fig. 6, the semi-cylindrical. projecting portion thereofis maintained in such position as to engage one of the shoulders 170 of the clutch disk 160, whereby the two cooperating clutch members 160 and 162 are rigidly connected together so that the continuous rotation of the gear wheel 52 is transmitted to the clutch member 162.

In order to permit the machine to be turned over by hand if desired, manually operable means is provided for rendering the operation of the clutch 38 ineffective. This means comprises a longitudinally movable key 180 that is disposed within a recess in the left-hand end of the shaft 54:, and is associated with a knob 184 at the end of the shaft by means of which the key may be manually moved into and out of operative position. The key 180 is disposed within a longitudinal slot 182 in a cylindrical member 186 that is slidably positioned within the hollow end of the shaft 5 1, and said key is pivotally mounted between the opposite sides of said member upon a pin 188. The inner end of the: key 180 is provided with a projecting por tion or spline 190 that is adapted to project through a slot 192 in the side of the hollow shaft 5 1 and into a keyway 194C in the hub 172 of the clutch member 162, whereby the clutch member 162 is rigidly connected to the shaft 5 1:. A spring 196 is disposed within a recess in the key 180 and acts against a pin 198 that engages the inner wall of the hollow shaft 5 1 to force the key outwardly to establish the connection just referred to, whenever the key 180 is pushed into its operative position. With the key 180 in its operative position the clutch member 162 is positively keyed to the shaft 54, so that under such conditions, if one of the shoulders 170 of th e clutch member 160 is rotated into engagement with the clutch pin 1641 the normally idle Sllfllfh5t is thereby connected to the continuously operated gear wheel 52 and is therefore rotated accordingly to effect the operation of the welt-butting cutters, as hereinbe'fore described.

Assuming the key 180 to occupy its opera tive position to connect the clutch member 162 to the shaft 5 1, as shown in Fig. 4, the disconnection of said members may be ef fected by pulling out the knob 161, which causes an inclined cam surface 200 on the key 180 to ride over the edge 202 of the slot 192, whereby the key is forced inwardly and out of engagement with the keyway in the clutch member 162. 'llhe crank shaft 54;

may therefore be rotated by hand through the agency of a hand wheel 204' that is attached to the "opposite end thereof.

164: is provided with a 'do'g 206 which nor mally projectsoutwardly through a recess in the cl i'i'tch' m'ember 162 into the position shownin Fig. 6.

Assuming the cooperating members of the clutch 38' to be connected and rotated a clockwise direction, as viewed in Fig. '6, the mech'anisi'i'i for operating the" welt-butting cutters is actuated -until the dog 206 is, brought into engagement with the end of spring-cushioned pin 208 which is carried" by a stop 216 that'isvertic'ally movable in sleeve 212' that forms a part of the clutch casing 48. The step 210 is normally maintained in its upper position by means of a spring214 which is: seated upon an adjust able nut 216 by means of which the tension of the spring maybe varied at will. As the dog'206 is brought into engagement with the springcushioned pin 208 said pin yields slightly to relieve the shock at the moment of impact, and forces the dog to its other position, as shown in Fig; 2, duringwhichaction the spring 17 6 is overcome. Thus, the semi-cylindrical pro-jectingportion of the rotatable clutch pin 16& is rotated out of contact with the shoulder 170 with which it is engagedpthereby permitting relative movement between the cooperating clutch members 160 and 162. The clutch 38 is thus disengaged, and the crank-shaft 54C disconnected from the source of power, the relative position of the parts being as shown in Fig. 2.

In order to render it unnecessary for the operator to hold his foot on the treadle 32 While the crankshaft 54' is being operated and'the welt-butting operation taking place, automatic means is provided'for locking the swinging frames 16 and 18 in the position to which they have been nioved by the depression of the treadle. This locking mechanism is illustrated particularly in Fig. 8, and comprises an arm 218 that is pinned to the rock shaft 134 and which projects rear- "wardly between the, outer members of the bifurcated lever 138 The outer end 01 this armi's pivotally connected tdthe vertically extending square rod 84 which normally projects loosely tliroughan opening 220 in the clamping arin36. T his opening is pro- More-- over, this freedom of operation of the shaft vided with taperingi sides- 222that terminatein an edge sub stan'tiadly midway between the upper and lower surfacesoi' the arm, and the distances between the two edges referred to issuch that when the a m-occupies normal horizontal position, the rodBt is free to be' raise'd and lowered.

The clamping arm is pivotally mounted upon a pin 224 that is carried by the head '14 of the su 'aporting column 12- and is provided with a curved forward extension" 226, to the end of which spring 228 is attached". The other end of the spring 228'- is secured to a pin that projects iirom the upper portion of the head 14, and said spring tends to raise the curved extensionoi? the arm 86 and to lower the clamping portion thereoi' which cooperates with the rod 34; i p

When the shaft 54' and associatedbra-nli' 56-are at rest, at which time the dog 206 of the clutch 38 is in engagement with the stop pin 208, as shown in Fig. 2, a cam 236"th2tt is mounted on the crank shaft 54: engages the upper surface of the curved extension 226 of the clampi-iig arm and holds it down against the action of the spring 22 8'. The

recessed end of the clamping arm 36 is thus held in substantially horizontal position to permit the free upward and downward movement of the rod 34:.

As the swinging frames 16 and 18 are forced inwardly by the 'treadle mechanism tobring the welt support into engagement with the crease of the shoe, the rod 3 4 is moved upwardly throng'hthe recessed clamping arm 36, and as soon as the cl utch 38' is thrown in,- in a manner to be hereinafter described, the crankshaft 54: rotates and the cani 230 associated therewith disengages the curved eX-tension -226 of the recessed cl arnp in-g arm 36, whereby the spring 228 lowers the recessed end of the clamping. arm 36* to cause the tapering side's oft the recess to bite and firmly lock the rod 3a in position, shown in Fig. 3'. Inasmuch asthe arm 218 to which the rod 34 is connected is pinned to the rock-shaft 18 1, said shaft and relatively fixed arm 218, together with the lever 138, are also locked. Thus, the swinging frames 16 and 18 that are actuated to their inner positions through the agency of the lever 1'38 and struts 1412 are firmly clamped and maintained in operative position with respect to the shoe being operated upon, until the clutch 38 is again disconnected and the cam 230 on the crank-shaft 54- again depresses the curved extension 226 of the clampin arm 36. The clamping arm- 36 is thus raise? to its horizontal position, whereby the rod 34 and the swinging frames 16 18 and treadle mechanism are released. The names are thereupon swung outwardly by the spring 118 to disengage the shoe and the treadle mechanism is restored to its initial raised position, as will be understood.

,In operating the machine, it is necessary to provide some means for throwing in the clutch 38 after the swinging frames have beenswung into operative position, in order that the operating mechanism of the weltbutting cutters may be started into action. The means for performing this function is associated with the treadle mechanism, and is adapted to operate only after pressure has been placed upon the welt-crease through the compression of the spring 136, and comprises the stop-releasing finger 40 (Figs. 1 and 2), which is pivotally attached to an arm 232 that is carried by the eX tension of the rock-shaft 134. This finger is provided with a latch 234 which, by means of a spring 236, is normally maintained in position to be brought into engagement with an adjustable screw 238 that is carried by a pin 240, the latter being secured to the movable sto) 210 and projecting through a slot 242 in the sleeve 212.

As the treadle mechanism is depressed to compress the spring 136, the rock-shaft 134 which is pinned to the arm 132 is rotated to cause the arm 232 that supports the stopfinger 40 to lower said stop-finger until the latch 234 thereof is brought into engagement with the adjustable screw 238. The continued lowering of the stop-finger 40 effects the depression of the stop 210 until the spring-cushioned pin 208 carried thereby is disengaged from the dog 206 which controls the operation of the rotatable clutch pin 164. Thereupon, the spring 17 6 rotates the clutch pin 164 to cause its semi-cylindrical projecting end to be brought into the path of and to be engaged by one of the shoulders 170 of the rotating clutch member 160. Thus, the clutch 38 is thrown in to connect the normally idle crank-shaft 54 to the source of power, whereupon the operation of the mechanism for actuating the welt-butting cutters is initiated and the ends of the welt are scarfed or beveled in the manner already described.

Since it is desirable to interrupt the operation of the machine at the end of each cycle, it is requisite to provide means for permitting the stop 210 to be raised into its normal position after the dog 206 has been disengaged, irrespective of the position of the treadle mechanism in order that said stop may again function to engage said dog and disconnect the clutch as soon as a single revolution thereof has been completed. Means is therefore provided to release the latch 234 of the stop-finger 40 from the adjustable screw 238 immediately after the stop 210 has been withdrawn, and this means comprises a pin 244 that is slidable through the clutch casing 48, the outer end of the pin having a sliding engagement with the upper end of the stop-finger 40, and the inthe clutch member 162.

ner end thereof having a similar engagement with an eccentric 246 that is secured to The eccentric 246 temporarily forces the pin 244 outwardly to release the latch 234 at the proper time, as will be readily understood.

Having released the stop-finger 40 to permit the stop 210 to assume its operative position, said finger becomes inoperative until again restored to its initial position in which the latch 234 is above the adjustable screw 238. This restoration of the finger 40 to position is effected at the time that the swinging frames 16 and 18 and the treadle mechanism are unlocked and returned to their initial positions. The machine is thus in readiness to act upon another shoe and to repeat the cycle of operations hereinbeforc set forth.

From the foregoing description, it is evident that, were it not for the manually operable key 180, it would be impossible to turn the machine over slowly by hand, for the reason that in the inoperative position of the rotatable pin 164, its dog 206 engages the stop-pin 208 and prevents movement of the shaft 54, while if the rotatable clutch pin 164 occupies its operative position, the rotating part of the clutch is at once connected to its relatively stationary cooperating clutch part whereby the operating mech anism of the machine is power driven.

By the use of the manually operable key 180, however, the clutch part 162 that is normally fixed to the driving shaft 54, may be released therefrom so that the driving shaft 54 and operating mechanism are entirely free of the clutch and may be turned over by hand without regard to the condition of the clutch itself.

Although the preferred embodiment of the invention has been shown and described as comprising specific structural details and arrangements and locations of parts, those skilled in the art will readily understand that many modifications may be made there in without departing from the spirit and scope of the invention. Therefore, only such limitations should be imposed as are indicated in the appended claims.

That which is claimed as new is 1 A welt-butting machine having, in combination, a welt support for engaging a welted unsoled shoe beneath the end of the welt, a movable supporting arm, a welt-butting cutter carried thereby, and means for actuating said supporting arm to cause said cutter to butt the welt upon said support in substantially a straight line and to return it to initial position in a curved path.

2. A welt-butting machine having, in combination. a welt support for engaging a welted unsoled shoe beneath the end of the welt. a movable supporting arm, a weltbutting cutter carried at one end thereof, and

the cutter to butt the welt upon said welt support on its working stroke and for imparting to said arm a concurrent longitudinal and lateral movement to cause the cutter to travel in a curved path on its idle return stroke.

3. A welt-butting machine for operating upon a welted unsoled shoe having, in combination, a support for the end of the welt, a weltbutting cutter, a movable arm for supporting said cutter, an oscillatory supporting link pivotally connected to said arm between its ends, and actuating means acting on one end of said arm for causing said cutter to bevel off the end of the welt upon said welt support in a substantially rectilinear path and to be subsequently raised from the work and returned to its initial position.

4. A welt-butting machine for operating upon welted unsoled shoes having, in combination, a support for the end of a welt, a welt-butting cutter, a movable arm for supporting said cutter, a crank connected to one end of said arm, an oscillatory supporting link pivotally connected to said arm between its ends, and means for rotating said crank to cause the cutter to bevel off the end of the welt upon said welt support.

5. A welt-butting machine having, in com bination, a pair of swinging heads, support-- ing arms severally movably mounted on said heads, welt-butting cutters severally carried on said arms, a crank connected to one end of each arm, oscillatory supporting links severally pivotally connected to said arms between their ends, and means for rotating said crank.

6. A welt-butting machine having, in combination, a pivotally mounted head, a movable arm mounted thereon, a welt-butting cutter carried by one end of said arm, means for swinging said head to bring said cutter into operative relation with a shoe, a link connected between an intermediate point in said arm and said head, and a rotatable crank connected to the other end of said arm for actuating said arm and cutter carried thereby.

7 A welt-butting machine having, in combination, a welt-butting cutter, a supporting arm for the cutter, a rotatable crank, connections between said arm and said crank, and a non-extensible link connecting said arm to a fixed point,

,8. A welt-butting machine having, in combination, a welt-butting cutter, a supporting arm for said cutter, a rotatable crank, and universal connections between said arm and said crank.

9. A welt-butting machine having, in combination, a pair of swinging heads, a cutter supporting arm movably mounted on each head, a welt-butting cutter carried on each arm, a rotatable crank, and means for independently connecting said arms to said crank and for permitting the arms to be swung with said heads.

10. A stock-cutting machine having, in combination, means for supporting the stock to be operated upon, a cutter, a movable arm supporting said cutter, and means for actuating said arm including an oscillating link to cause said cutter to sever the stock upon the supporting means in substantially a straight line and to return it to initial position in a curved path.

11. A stock-cutting machine having, in combination, a stock support, a cutter, a movable arm for supporting said cutter, and means including a crank operating upon one end of said arm and an oscillatory supporting link pivotally connected to said arm between its ends for actuating said cutter in a rectilinear path, during its cutting stroke and in a curved path during its idle return stroke.

12. A stock-cutting machine having, in combination, means for supporting the stock to be operated upon, a cutter, a movable arm for supporting said cutter, a crank connected to one end of said arm, an oscillatory supporting link of fixed length pivotally connected at one end to said arm between its ends, said link having a fixed pivot at its other end, and means for rotating said crank to cause the cutter to sever the stock upon said supporting means.

13. A stock-cutting machine having, in combination, a swinging head, a cutter supporting arm movably mounted thereon, a cutter carried thereby, a rotatable crank, and'a universal connection between said arm and said crank to permit .the arm to be swung with the head and also to be actuated to cause the cutter to cut the stock.

14. A welt butting machine having, in combination, means for supporting the welt to be operated upon, a cutter, a pivoted, movable supporting lever to which said cutter is. rigidly connected, means for guiding said pivot in a fixed curvilinear path and means for actuating said lever to cause said cutter to sever the welt upon the supporting means substantially as described.

15. In a machine for removing surplus material from the bottom of a welted shoe, the combination of a knifecarrier, a knife on one end of the carrier, means for causing the opposite end of the carrier to move in a circular path, and means for causing any intermediate portion of the carrier to move in an arc,

16. In a machine of the class described, the combination of means for locating a shoe in position to be operated upon, a cutting tool arranged for o erating upon the shoe bottom by movement in a direction lengthwise of the shoe, and means for causing said tool to move in an orbital path 'such that the portion of said path during which the tool is in contact with the shoe 5 is approximately a straight line.

17. In a mahine for removing surplus stock from shoe bottoms, the combination of a knife carrier a cutter on the carrier, Y

means for actuating the carrier, and means cooperating with said actuating means to cause the cutter during its cutting action to more in substantially a straight line and to return to initial position in a curved path.

EDWARD ERICKSON.

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