US1914936A

US1914936A - Sewing machine

Info

Publication number: US1914936A
Application number: US394770A
Authority: US
Inventors: Ashworth Fred
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1929-09-24
Filing date: 1929-09-24
Publication date: 1933-06-20
Anticipated expiration: 1950-06-20

Description

LYEminem), 1933.' F. AsHwoRTH SEWING MACHINE Filed Sept. 24, 1929 '7 Sheets-Sheet l wem June 20, 1933. F. ASHWORTH 1,914,936

SEWING MACHINE Filed Sept. 24, '1929 7 Sheets-Sheet 2 lztg. .5

m53 Tjezr June 20, 1933.

Filed sept. 24, 1929 F. ASHWORTH SEWING MACHINE 7 Sheets-Sheet 3 mail??? F. ASHWORTH SEWING MACHINE June 20, 1933.

Filed Sept. 24, 1929 7 Sheets-Sheet 4 52mm@ Z, lg F ASHWORTH l@ SEWING MACHINE Filed Sept. 24, 1929 7 Sheets-Sheet 5 .Fume 20, 39330 F. AsHWoRTs-H' SEWING MACHINE Filed sep-t. 24, 1929 7 Sheets-Sheet 6 June 20, 933. F. ASHWQRTH Em SEWING MACHINE Filed Sept. 24, 1929 '7 Sheets-Sheet 7' Patented .inne 2G, 1933 FRED ASHWRTH, OF AM, MASSACHUSETTS, ASSIGNOR T UNTED SHE MCHINERY CORPBATIN, OF PATERSGN, NEW JERSEY, A CORPORATION OF NEW SEWING MACHINE Application filed September 24, 1929. Serial No. 394,770.

The present invention relates to shoe sewing machines and more partlcularly to features of construction and operation of certain mechanisms which are adapted for use in a machine and the so-called McKay type which comprises a straight hook needle and a shoe supportir g horn arranged to extend into the shoe and a needle threading whirl o., located in the horn.

present invention to simplify and improve the several cooperating mechanisms of a machine of the type herein described, to 'provide a machine which will operate accurately and eiiiciently at high speeds to produce a high grade of work. More specifically, it is an object of the present invention to provide a novel and improved feeding mechanism for -feeding the work particularly adapted for use in a machine of this type, which is simple and sturdy in construction and will operate eiiiciently andaccurately at a high rate of speed.

A further object of the invention is to provide a novel and improved means for controlling the operation of the needle on starting the machine. Y

A further object .of the invention 1s to provide a novel and improved mechanism for raising the presser-foot from the work during each stitch formlng cycle a uniform distance from the surface of the work regardless of its thickness.

With these objects in view, the several features of the invention consist in the devices, combinations, and arrangement of parts Y hereinafter described and claimed which, to-

"J gether with the advantages 'tobe obtained thereby, will be readily understood by oneY skilled in the art from the following description taken in connection with the accompanying drawings in which Fig. 1 is a view in left side elevation of a McKay lockstitch sewing machine embodying the several features of the invention; Fig. 2 is a detail front view of the improved shuttle and thread holder; Fig. 3 is a detail view of the shuttle and thread holder taken on the line 3.-3 of Fig. 2; Fig. 4 is a detail sectional view of a portion of the thread holder removed from the shuttle and with the locking arm in raised position to permit threading of the thread holder; Fig. 5 is a View 0n an enlarged scale vof a portion of the head of the machine looking from the left; Fig. 6 is a View similar to Fig. 5 of the head 'of the' machine looking from the right; Fig. 7 is a view infront elevation of the head of the machine, together with a portion of the horn and with the work being operated upon shown in section; Fig. 8 is a detail view of the latch shown in Fig. 7 for holding the needle in raised position; Fig. 9 isa view similar to Fig. 7, the parts being shown with the needle extended through the work; Fig. 10 is a view similar to Figs. 7 and 9 with the machine being shown in stopped position; Fig. 11 is a`detail View of the latch mechanism with the parts in normal operating position; Fig. 12 is a detail view partly in section of the presser-foot lifting mechanism; Fig. 13 is a sectional plan view taken on the line 13-13 of Fig. 12; Fig. 14 is a sectional plan view taken on the line 14-14 of Fig. 12; and Fig. 15 is a detail view partly in section illustrating particularly a portion of the mechanism for actuating the feed point.

Except in so far as hereinafter pointed out and described, the various parts and mechanisms of the machine herein disclosed as embodying the several features of the present invention are similar to those described more in detai in the above mentioned applications, and therefore will bey only brieiiy referred to in the following description.

The machine herein disclosed is provided with a presser-foot 14, a straight hook needle 16, and a work entering horn 18 which carries a whirl 2O for threading the needle. The machine is further provided with a shuttle 22 provided with a shuttle hook 24 and a loop spreader 26 which is adapted to spread the needle loop and bring it into the path of the shuttle hook 24. t

The horn of the machine comprises an upper portion 28 arranged toextend within and support the shoe during the sewing operation, and a. downwardly extending cylindrical portion 30 rotatably mounted in the forward extension of the 'machine column. The needle threading whirl 20 is driven through the usual connections including a vertical shaft 32 extending through and journalled concentrically with the cylindrical portion 30 of the horn, and a horizontal .shaft 34 from the vertical drifting shaft 36.

The machine is driven from an electric motor 38 through a clutch mechanism indicated in Fig. 1 in dotted lines, and this clutch mechanism is controlled from a foot treadle indicated at 40 mounted on a treadle lever 42 which is normally held in raised position by means of a spring` 44. The clutch mechanism acts to connect and disconnect the motor with a shaft 46 and sleeve 48 in the base of the machine from which power is transmitted to the sewing` cam shaft 50 in the head of the machine and to the whirl 2O through the vertical driving shaft 36.

As more fully described in the applications above referred to, 'the straight hook needle 16 of the machine is secured to the lower end of a needle bar 52 which is mounted in

bearings

54 and 56 to reciprocate in a vertical direction to and from the work. The needle bar 52 is actuated from a crank pin 58, offset from the end 0f the sewing cam shaft 50, through connections which are adapted to permit the needle to be disconnected from its driving mechanism at the top of its retracting stroke. These parts compris-e a needle actuating lever 60 which is secured to the forward end of a rock shaft 62 and is connected through a link 64 to a bracket 66 rigidly clamped to the needle bar 52. A lever 68 is loosely sleeved on the rock shaft 62 at the side of the lever 60 and is given a continuous reciprocatory movement by the engagement of the crank pin 58 in a cam groove 70 in the lever 68. To cause the lever 60 to oscillate with the lever 68, the shaft 62 on which the lever 60 is secured and the sleeve portion 72 of the lever 68 are connected by a coiled spring 74 which tends to move the needle actuating lever 60 downwardly with relation to the lever 68 so that a flange 76 on the lever 60 is brought into Contact with a corresponding flange 78 on the lever 68. During the operation ofthe machine, these levers are further held rigidly with relation to each other by means of a latch 80 which is pivotally mounted on a pin 81 rigidly clamped in the end of the needle lever 60, and is provided with a hook portion 82 to engage a corresponding pin 84 on the crank actuated lever 68. A spring 85 coiled about the pin 81 and secured at one end to the latch lever 80 and at its other end to an adjustable sleeve nut 87 on the pin 8l tends to swing the latch lever in a` clockwise direction as shown in Figs. 7, 9, and 10 to hold it in contact with the pin 84.

Mechanism is provided which is rendered operative when it is desired to stop the machine to disconnect the needle from its actuating mechanism and lock it out of operation at the top of its retracting'stroke. This mechanism comprises a locking lever 86 which is secured to a rock shaft 88 and is provided with a slot 90 to receive a cam roll 93 secured to the end of the needle actuating lever 60. The upper end of the slot 90 is offset to the right as shown in Figs. 7, 9, and 10 so that for one position of the lever 86, the lever 60 will be permitted to move freely up and down, while for a second position of the locking lever 86 as shown in Fig. 10, the lever 60 will be held out of operation at the top of its retracting movement. The shaft 88 to which the locking lever 86 is secured is provided at its other end with a lever arm 92 which is connected by a short link 94 with one end of a lever 96 loosely mounted on a pivot shaft 98 on the machine frame. A spring 100 coiled about the pivot 98 and secured at one end to the lever 96 and at'the other end to an adjustingsleeve" 102 on the pivot shaft 98 tends to force the lever 96 in a direction to move the locking lever 86 to the left as viewed -in Figs.y 7 9, and 10 to lock the needle lever 60 out of operative position. During the operation of the machine, the lever 86 is forced to the right, as viewed in F igs. 7, 9, and l0, against the pressure of its spring 100 by connections controlled from the starting treadle 40, as in the machines of the'applications above referred to, to permit the free oscillation of the needle lever 60.

When the foot treadle 40 is released, allowing the locking lever 86 to move to the left under the influence of the spring 100, to lock the needle lever 60 out of operative position at the top of its retracting stroke, the latch lever 80 is rotated about its pivot in a counter clockwise direction against the pressure of its spring 85 by the engagement of an abutment 106 on the locking lever with an upwardly extending arm of the latch 80 to disconnect the latch from the pin 84.

It. has been found that when the needle lever 60 is released by the movement of the locking lever 86 to the right upon starting the machine, the needle is frequently driven instantaneously down through 'the work by the action of the spring 74 if the actuating leverY 68 happens to have come to rest at a ICJ low point in its movement. In order to overcome this ditiiculty, one feature of the present invention contemplates the provision of mechanism to hold the needle in its raised position until the needle lever is operatively connected to the actuating lever 68. This mechanism comprises a hook 110 which is formed on an upwardly extending arm of the latch lever 80, and is adapted to engage with a corresponding projection on the abutment 106 on the locking lever 86 so that as the locking lever 86 is moved to the right to release the needle lever 60, the movement of the latch lever 80 under the pressure of its spring 85 will cause the hook 110 to engage the abutment 106. As the locking lever 86 continues its movement to the right, the latch lever 80 will move in a clockwise direction about its pivot under the pressure of its spring 85 to maintain contact of the hook 110 with the abutment 106, and thus to hold the needle lever 60 in 'itsraised position. As theactuating lever 68 again rises during the next revolution of the sewing cam shaft, the pin 84 will engage a cam surface 112 formed on the under portion of the latch lever 80, causing the hook 110 to be disengaged from the abutment 106 so that the needle lever 60 can be moved downwardly under the influence of its spring 74 to bring the flanges 76 and 78 into engagement and subsequently to permit the engagement of' the hook portion 82 of the latch lever with the pin 84 to lock the needle lever 60 and the actuating lever 68 in operative relation. rlhe construction and arrangement of the latchlever 80, the pin 84, and the abutment 106 are such that when the latch lever assumes its normal operative position in engagement with the pin 84, the hook portion 110 of the latch lever clears the abutment 106 by a substantial amount, as clearly shown in Fig. 8.

The presser-foot 14 is adjustably secured in a groove in the lower face of .a block 114 secured to the lower end of the vertically movable presser-foot bar 116. rlhe presser-foot is forced downwardly against the work by means of the spring 118 surrounding the presser-foot bar, and also by a spring 120 which surrounds a shaft 122 and is secured at one end to a. collar 124 fast on the shaft and at its other end to a collar 126 adjustably fixed with relation to the machine frame. An arm 128 is secured to the shaft 122 and is connected to the block 114 on the lower end of the presser-foot bar by the engagement of a pin 130, secured to the presser-foot block 114, with a slot in the end of the arm 128.

The presser-foot is raised slightly dur- .ing each cycle of operations to permit the feeding of the work, by mechanism which comprises a cam lever 132 loosely sleeved on a xed bearing shaft 134 which carries a cam roll 136 adapted to ride on a cam 138 on the sewing cam shaft 50 of the machine. A spring 140 surrounding the pivot shaft 134 and connected at one end to the hub of the cam lever 132 and at its other end to an adjustable nut 142 tends to hold the cam roll 136 at all times in engagement with its cam 138. At its free end the cam lever 132 is connected by a link 144 to lan arm 146 secured to the rear end of a r'ock shaft 148. As most clearly shown in the detail plan view Fig. 13, the shaft 148 is provided at its forward end with a U-shaped frame 150 to permit free play for the shuttle actuating lever. A presser-foot lifting lever 152 is mounted on frame 150 and is given a movement of constant amplitude with the frame 150 and rock shaft 148 from the cam 138 through the connections above described. In order to permit an adjustment of the limits of movement of the presser-foot lifting lever 152, the lever is pivotally mounted on the frame 150 concentric with the shaft 148 and the hub of the lever is provided with set screws 156 which engage between them a corresponding flange 158 projecting from the frame 150.

@ne feature of the present invention consists in the provision of a simple and efficient device secured to the presser-foot bar 116, which will cooperate with the presserfoot lifting lever 152 to cause the presser-foot to be lifted from the work with certainty a predetermined amount regardless of the thickness of the work. This mechanism coinprises a cam-shaped member 160 which is mounted to rotate on a bracket 162 on the presser-foot bar 116, and is adapted to engage with a. pin 164 rigidly secured to the end of the presser-foot lifting lever 152. The bracket 162 is rigidly clamped to the presserfoot bar 116 by means of the clamping screws 166. 1n order to cause the presser-foot to be lifted a predetermined amount irrespective of the thickness of the work. mechanism is provided for adjusting the cam-shaped member 160 in accordance with the thickness of the work. This mechanism comprises a rack 168 which is mounted to slide in a slot 170 in the presser-foot bar 116 andengages with a pinion 172 formed on the pivot shaft to which the cam-shaped member 160 1s secured. The rack 168 is moved in its guideway 170 to adjust the cam-shaped member 160 in accordance with the thickness of the work by means of a pinion 174 which is mounted to rotate in the forked end of a lever 176 secured to a pivot shaft 178 journaled on the machine frame. A correspondingrack 180 parallel to the rack 168 is formed on the downwardly extending arm of the bracket 162 and engages the opposite side of the pinion 174. In order to permit a slight play for the pinion 174 with relation to the supporting lever 176, the pinion is mounted in bearing blocks 182 which are slidably mounted the axis of the cam.

in corresponding slots 184 on the arms of the lever 17 6. A spring 188 coiled about the pivot shaft 178 and secured at one end to an abutment on the machine frame and at the other end to an adjustable collar 190 on the pivot shaft 178 tends to move the lever 176 downwardly to its limiting position which is determined by the engagement of a projection 192 on the lever 176 with a set screw 194 on the machine frame.

In the operation of the machine, the presser-foot is permitted to move downwardly into contact with the work, and since the lever 176 is held rigidly in position by the engagement of the abutment 192 with the set screw 194, the downward movement of the rack 180 with the presserfoot bar 116 will cause the pinion 174 to rotate about its axis and move the rack bar 168 upwardly in its slot in the presser-foot bar, thus causing the cam-shaped member 160 to be rotated about its pivot in a clockwise direction, as viewed in Fig. 12. The final position taken by the cam-shaped member 160 will thus depend on the distance which the presser-foot bar 116 is depressed before it comes into contact with the work. The pin 164 on the lifting lever 152 contacts with the cam-shaped member 160 beneath and vertically in line with The cam is snail-shaped and the movement imparted to the cam is such that the point at which it is engaged by the pin 164 is always at the same height, the point rising and falling with relation to the presser-foot bar a distance exactly equal to the falling or rising movement of the bar. The pin 164 thus engages the cam 160 always at the same point in the upward movement of the lever 152 so that the presser-foot is always lifted a .uniform fixed amount above the surface of the work.

It will be noted that the rack bar 168 moves in the opposite direction to the movement of the presser-foot bar as the bar rises and falls, and by reason ofthe fact that the pinion 174 has no rising and falling movementvwhile it is being rotated and the fact that the pinion 172 moves bodily towards and from the pinion 174 and is someviat smallerin diameter, the pinion 172 will be turned through more than twice the angle through which the pinion 174 is turned. By reason of this construction and mode of operation, the slope of the surface of thecam 160 is very gradual, and consequently the engagement of the pin 164 with the surface of the cam serves to lock the cam securely against rotation in either direction and a posit-ive lifting movement is imparted to the presser-foot without the necessity of any'additional locking or clamping devices. Since the cam member 160 is locked against rotation in either direction by the engagement therewith of the pin 164, the rack 168 and the pinion A174 together with the lever 176 are lifted with the presser-foot durin the continued upward movement of thel li ting lever 152, causing the lever 176 to turn about its pivot against the pressure of the spring 188.

The feeding mechanism of the machine comprises a feed point indicated at 196 which is adjustably clamped in'a holder formed on the lower end of a vertically arranged member 198 which forms a carrier for the feed point. The carrier 198 is mounted for vertical movement toward and away from the work in a frame 200 which is pivotally mounted on the main frame of the machine at 202. The frame 200 is oscillated about its pivot to impart feeding movements to the feed point 196 in the line of feed by means of a feed lever 204 which is loosely mounted on the hub of the needle locking lever 86 at the outer end of the rock shaft 88. The feed lever 204 is in the shape of a bell crank and is provided in its vertical arm with a camshaped slot 208 which is engaged by the roll 93 on the end of the needle actuating lever 60 so that as the needle lever is moved up and down during the operation of the machine, an oscillatory movement is imparted to the feed lever 204 in timed relation to the operation of the sewing elements. The feed lever 204 is provided with a horizontally extending arm 210 which has a block and slot connection with a corresponding laterally eX- tending arm 212 formed on the frame 200. The connection betweenthe

arms

210 and 212 comprise a block 214 which is mounted on a pin 216 secured to the arm 212 and is adapted to ride in a corresponding groove.'

or guideway 218 in the arm 210 of the feed lever 204. In order to permit an adjustment of the length of feeding movement of the feed point 196, the pin 216 is adjustably clamped in a slot 219 in the arm 212. In order' to maintain constant the limit of the retracting movement of the feed point 196 for different adjustments of the pin 216 to secure different lengths of feed the parts are arranged so that at the end of the retracting stroke of the

feed arms

210 and 212 are always brought back to a parallel position.

Vertical movements towards and away l from the work are imparted to the feed point 196 and the carrier 198 through connections from the shaft 148 for actuating the presserfoot lifting lever 152 which connections comprise a link 220 secured at one end to a pivot 222 at the upper end of the carrier 198 and at its other end to one arm of a bell crank lever 224, pivotally mounted at 226 on the block 114 at. the lower end of the presser-foot bar. The other arm of the bell crank 224 is connected by a link 228 to a lever arm 230 which is secured to the frame 150 at the outer end of the rock shaft 148. The lever arm 230 is mounted upon a pivot shaft 232 arranged in alignment with the' shaft 148 and-having one end journalled in the frame 150, and the other end securedvin a bracket 234 forming part of the machine frame. The hub of the arm 230 is provided with lateral extensions which are engaged by set screws 236 mounted in lugs projecting from the frame 150 at opposite sides of the shaft 232. These set screws rigidly secure the arm 230 to the frame 150 and afford a means by which the arm 230 can be adjusted with relation to the rock shaft 148 to vary the ylimits of the movement of the feed point 196 towards and from the work.

It is to be noted that the frame 200 which imparts feeding movements directly to the feed point 196 is pivoted upon the frame of the machine so that its Yposition at all times is unaffected by any change in the thickness of the work, and it is also to be noted that a. portion of the mechanism through which movements are imparted to the feed point towards and from the work, namely the bell crank 224, is mounted upon the presser-foot bar so that the path of movement of the feed point is controlled by the presser-foot, the

`limits of movement of the feed point varying with the thickness of the work and the penetration of the feed point into the work being the same for all thicknesses. A feeding mechanism is thus provided which is simple and sturdy in construction and which will operate efficiently to feed the work accurately the required distance between successive actuations of the needle.

It is also to be noted that by reason of the fact that the feed lever 204 is separate from the locking' lever 86, the slot in the feeding lever can be utilized to continue the feeding movement of the feed point until the roll 93 reaches the extreme upper end of the slot. A greater portion of the stitch-forming cycle can thus be utilized for the feed than is possible in the construction illustrated in the applications above referred to, in which the locking lever is also utilized as a feeding lever. j

In order to permit the presser-foot to be readily raised by the operator to release the work, a hand lever is provided pivotally mounted on the pivot shaft 232 outside of the bracket 234 and is provided with an abutment 242 adapted to engage a pin 244 secured to the bracket 162 clamped to the presser-foot bar 116. The hand lever 238 is normally held retracted out of operative position by means of a small tension spring 246 which is connected at one end to the lever and at its other. end to a point on the machine frame.

The shuttle and thread holder case is intended as an improvement on the shuttle and thread holder case disclosed in applicants prior application Serial No. 338,756 hereinbefore referred to. The shuttle casing is similar in all respects to that disclosed in applicants prior application and the thread holder is similar in many respects to the thread holdei` disclosed in said application.

The thread holder of the present machine, however, is arranged to allow the thread to be drawn from the outside of the thread mass or thread cop instead of from the inside. As illustrated in Figs. 2, 3 and 4, the discoidal shuttle casing is indicated at 248. The rear end of this casing is closed and the forward end is open to receive the thread holder. The thread holder indicated at 250 consists of a cylindrical thread case, the rear end of which is open to permit the insertion of a cop of thread while the holder is removed from the shuttle, and the front end of which, when the thread case is in position in the shuttle, forms a closure for the open end of the shuttle c asing, the construction as so far described being substantially the same as that disclosed in applicants prior application. F rom the closed end of the thread case 250 a stud 252 extends inwardly to form a central support for the thread mass or cop and Within this ystud a spring pressed plunger 254 is mounted. This plunger however, instead of being pressed inwardly as in applicants prior construction, is pressed outwardly and its outward movement is limited by a washer 256 seated in under-cut grooves formed in the outer end of the thread case and forming a guideway for the locking slide hereinafter described. When the thread holder casi'ng, properly threaded, is in position in the shuttle casing, as indicated in Figs. 2 and 3, the thread leads from the outside of the thread mass through an opening in the side wall of the thread holder case and then radially inward over the outer end of the thread holder case to a central opening 257 formed in an overlying arm 258. The opening 257 is directly over the outer end of the plunger 254, and the thread in its passage from the thread mass to the opening passes between the inner surface of the arm 258, and the outer end of the plunger. The shuttle thread is thus subjected to sufficient pressure to produce the required tension on the thread.

Means for locking the thread case securely in position in the shuttle casing, while permitting its ready removal, comprise a flange y260 projecting radially from the inner end of the thread case and adapted to engage a slot formed in the wall of the shuttle casing, and the arm 258, the free end of which is arranged to engage a groove 262 formed 1n the shuttle casing diametrically opposite the slot which receives the flange 260. To permit the arm 258 to be moved into and out of engagement with the groove 262, it is mounted upon a slide 264 which is arranged to move in a diametrically arranged guideway formed by the undercut grooves 265 in the outer end of the thread case 250. The thread case can be readily removed from the shuttle casing by moving the slide 264 towards the right, as viewed in Figs. 2 and 3, until the end of the arm 258 moves out of engagement with the groove 262 and by then tilting the thread case slightly so as to disengage the iange 260 from its cooperating slot. The thread case can be completely threaded before it is replaced in the shuttle casing. In order to facilitate the threading operation, the arm 258 is pivotally mounted upon the slide 264 at 266. This permits the arm 258 to be swung outwardly into the position indicated in Fig. 4, in which position the end of the shuttle thread can readily be passed outwardly through the opening 257. When the locking slide 264 and arm 258 are moved to the left, as viewed in Figs. 2 and 3, to lock the thread case in the shuttle casing, the arm 258 is held down against the plunger 254 by the engagement of the outer end of the arm 258 with the shuttle casing. To assist in this action, and also to guide the arm 258 accurately into engagement with the slot 262, projecting lugs 268 are formed at the sides of the arm 258 near its outer end and are arranged to engage the slots 265 which are extended completely across the outer end ^f the thread case for this purpose. Openings 270 formed in the outer end of the thread case permit an outward movement of the arm 258 to the position indicated in Fig. 4, after the arm together with the slide 6' 1as bee moved diametrically of the thread case a sufficient distance to disengage the arm from the groove 262. lThe withdrawing movement of the slide 264 is limited by a'stop pin 272 projecting from the outer end of the thread case. The slide 264 with the arm 258 is held in locking position by the engagement of the outer end of the plunger 254 with a correspondingly shaped recess formed in the under side of the arm 258. The plunger is disengaged from its recess when it is desired to remove the thread holder case from the shuttle casing by inserting a suitably shaped tool through the o ening 257 and forcing the plunger inwar l The improvedy shuttle and thread holder case herein disclosed forms the Subj ect-matter of applicants co-pending application Serial No. 448,910, filed May l, 1930.

The invention having been described, what is claimed is:

l. A sewin machine having, in combination, stitchorming devices including a straight hook needle, a presser-foot, a feed point, a feed-point carrier movable towards and from the work, a pivoted frame in which 'the carrier is mounted movable about a fixed axis to reciprocate the feed point in the line of feed, a needle actuating lever, a feed lever, a pin and cam slot" connection for actuating the feed lever from theneedle lever, and connections between the frame and the feed lever.

2. A sewing machine having, in combination, stitch-forming devices including a straight hook needle, a presser-foot,`a

point, 'a feed point carrier movable towards and from the work, a pivoted frame in which the carrier is mounted movable about a fixed axis to reciprocate the feed point in the line of feed, mechanism for oscillating the frame to reciprocate' the feed point in the line of the carrier is mounted movable about a fixedA axisd to reciprocate the feed point in the line of feed, mechanism for lifting the presserfoot actuated in timed relation to the operation of the machine, connections from the said mechanism for imparting movements to the feed point toward and from 'the work, a needle actuating lever, a feed lever, connections for oscillating the feed lever from the needle actuating lever, and a connection for oscillating the -frame from the feed lever to reciprocate the feed point in the line of feed.

4. A sevvinvr machine having, in combination, stitchorming devices including av straight hook needle, a presser-foot, a presser-foot carrier, a feed point,a feed point carrier movable towards and from the work, a pivoted frame in which the carrier is mounted, movable about a fixed axis to reciprocate the feed point in the line of feed, mechanism for oscillating the frame to reciprocate the feed point in the line of feed, a lever pivotally mounted on the presser-foot carrier, connections from the lever to the feed point carrier, and means for actuating the lever to move the feed point carrier towards and from 'the work.

5. A sewing machine having, in combination, stitch-forming devices including a needle, needle actuating mechanism including a vibrating lever, a pln on the lever, a treadle controlled member provided with a notch to engage said pin and lock said lever with the needle at the limit of its stroke, a feed device, a feed lever provided with a cam slot engaged by said pin, and connections for actuating the feed device from the feed lever.

6. A sewing machine having, in combination, a straight hook needle, a shoe supporting horn, a. feed point, a feed lever and connections for moving the feed point back and forth in the line of feed, a needle lever and connections forl actuating the needle, a pin and cam slot connection between said levers for actuating the feed lever from the needle lever, and oclring lever in addition to the feed lever under the control of the operator movable to engage the pin and lock the needle lever at the limit of its stroke.

7. A sewing machine having, in combination, a straight hook needle, a shoe supporting horn, a feed point, a feed lever and connections for moving the feed point back and forth in the line of feed, a needle lever and connections for actuating the needle, a pin and cam slot connection between said levers for actuating the feed lever from the needle lever, a lever for actuating the needle lever, a latch connecting said last mentioned lever and the needle lever, a locking lever, and means for moving the locking lever to disengage the latch and lock the needle lever against movement.

8. A sewing machine having, in combination, a straight hook needle, a shoe supporting horn, a feed point, a feed lever and connections for moving the feed point back and forth in the line of feed, a needle lever and connections for actuating the needle, a pin and cam slot connection between said levers for actuating the feed lever from the needle lever, al locking lever provided with a slot engaging the pin, and treadle controlled means for holding one side of the slot yieldingly against the pin during sewing and the other side of the slot yieldingly againstthe pin in stopping to cause the locking lever to engage the pin and lock the needle lever at the limit of its stroke.

9. A sewing machine having, in combination, stitch-forming devices including a hook needle, a sewing cam shaft, an actuating lever continuously oscillated from the cam shaft, a needle lever, connections including a latch for connecting the needle lever to oscillate the actuating lever, a locking lever adapted to disconnect and hold the needle lever out of operation with the needle out of the work and means rendered operative upon starting the machine to hold the needle lever in raised position until substantially in engagement with the actuating lever.

l0. A sewing machine having, in combination, stitch-forming devices including a hook needle, a sewing cam shaftan actuating lever continuously oscillated from the cam shaft, a needle lever, means normally connecting the needle lever to oscillate with the 'actuating lever, a locking lever adapted to disconnect and hold the needle lever out of operation with the needle out of the work, and means rendered operative upon moving the locking lever to release the needle lever to hold the needle lever in raised position until the actuating lever is at substantially the top of its retracting stroke.

1l. A sewing machine having, in combination, stitch-forming devices including a hook needle, a sewingcam shaft, an actuating lever continuously oscillated from the cam shaft, a needle lever, a common axis for the said levers, abutments onrthe levers to limit thedownward movement of the needle lever with relation to the actuating lever, means tending to move the needle lever downwardly to engage the said abutments, va locking lever adapted to lock the needle lever out of operation with the needleout of the work, and a latch adapted upon starting the machine to hold the needle lever in raised position until the actuating lever is at substantially the top of its retracting stroke.

12. A sewing machine having, in combination, stitch-forming devices including a hook needle, a sewing cam shaft, an actuating lever continuously oscillated from the cam shaft, a needle lever, a common axis for the said levers, abutments on the levers to limit the downward movement of the needle lever with relation to the actuating lever, spring means tending to move the needle lever down wardly to engage the said abutments, a latch member adapted to maintain the relative position of the levers with the abutments in contact during the operation of the machine, a locking lever movable to disengage the latch and lock the needle lever out-of operation with the needle out of the work, and an abutment on the locking lever adapted, upon movement of the locking lever in a direction to release the needle lever, to engage the latch member and hold the needle in raised position until the actuating lever is at substantially the top of its retracting stroke.

13. A sewing machine having, in combination, stitch-forming devices, a presser-foot, a presser-foot lifting member, an abutment mounted on the pressenfoot against which the presser-foot lifting member operates to lift the presser-foot, and means controlled by the thickness of the work for adjusting the abutment to cause the abutment to be engaged by the lifting member at the same point in its movement and the presser-foot to be lifted from the work a uniform distance regardless of the thickness of the work.

14. A sewing machine having, in combination, stitch-forming devices, a presser-foot, a presser-foot lifting member, a cam mounted on the presser-foot against which the lifting member operates to lift the resser-foot, and means controlled by the tiickness of the work for imparting a rotative adjustment to the cam to cause the cam to be engaged by the lifting member at the same point in its movement and the presser-foot to be liftedy from the work a .uniform distance regardless of the thickness of the work. Y

'15. A sewing machine having, in combination, stitch-forming devices, a presser-foot, means for lifting the presser-foot comprising a presser-foot lifting member and an abutment against which the presser-foot lifting member operates to'lift the presser-l foot, one of said parts comprising a snailshaped rotatable cam, andl means comrolled Ill@ by the thickness of the Work for imparting a rotative adjustment to the cam to cause the lifting member to engage the abutment at the same point in its movement and the presser-foot to be lifted from the Work a uniform distance regardless of the thickness of the Work.

16. A sewing machine having, in combination, stitch-forming devices, a presserfoot, a presser-foot lifting member, a ro tatable cam mounted on the presser-foot against which the lifting member operates to lift the presser-foot, a pinion rotatable with the cam, a rack engaging the pinion, a driving pinion engaging the rack, a support for said driving pinion separate from the presser-foot, mounted to move with the presserfoot during its lifting movement, and a rack carried by the presser-foot engaging said driving pinion.

In testimony whereof I have signed my name to this specification.

FRED ASHWORTH.