US1541751A - Fur-sewing machine - Google Patents

Description

June 9, 1925.

H. ROSS FUR SEWING MACHINE 5 Sheets-Sheet 1 Filed Dec. 19, 1925 Q HZW v ATYOR Y Jiihe 9; 1923.

H. ROSS FUR SEWING MACHINE File c1 Dec. 19 1925 3 Sheets-Sheet 2 INVENTOR ATTORNEY Jun 9, 1925.

3 Sheets-Sheet Filed Dec. 19,

F/gj

w a Mo m 4 v M 3 w B Patented June 9, 1925,

HARRY Ross, or BROOKLYN, new

YoaK, ASSIGNOR or ONE-HALF To o'UIs mm,

OF NEW YORK, N. Y.

FUR-SEWING MACHINE.

I Application filed December 19, 1923. Serial No. 681,485.

To all whom may concern:

Be it known that I, HARRY Ross, a citizen of the United States of America, residing at Brooklyn, Kings County, State of New 5 York, have invented certain new and useful Improvements in Fur-Sewing Machines, of which the following is a specification.

This invention relates to fur sewing machines, and in particular to a type in which the-material to be operated upon is fed horizontally, and transversely of the needle which itself operates horizontally.

A particular object of the invention is to dispense with the cut cams used heretofore in this type of machine and to provide positive movements so that certain objectionable features will be eliminated.

A further object of the invention is to provide a feeding mechanism which will not only be simple in construction, but which will afford a positive variable feed to the goods in order that a varying length of stitch may be used and'production increased at will a V 1 i A further object is to provide a loop forming member, the peculiar movements of which will be caused by a more simplified mechanism than is in present use. In inachines of the present day, there is provided rotary out cams which due to constant use at high speed, soon wear out, vary the movements ofthe looper, thus tangling up the thread and hindering the stitching operation. It is, of course, essential, that coordination of the partsbe so timed that the sewing operation and the feeding operation vof the material will take place at the proper instant, and in order'to do this, it is neces sary to have every part of the mechanism positively moved and lost motion reduced to a minimum. 7

A further object, therefore, is to provide a machine in which all of the parts will be positively operated and in which said parts will be so arrangedthat lost motion will be practically negligible.

Referring to the drawings wherein I have shown a preferred embodiment of my in vention, 'i a Figure 1, is a view inside elevation of a machine const uct d in a c c th y idea,

Figure 2, is a top plan view of the machine as shown in Figure 1, the cover plate being left off to expose the interior mechanism, a

Figure 3, is a section in side elevation showing the looper voperating mechanism, and needle bar operator,

Figure 4, is a section taken on the line 4-4 of Figure 2, t

Figure 5, is a section taken on the line 5-5 of Figure 4,

Figure 6, is a top plan view of the feed mechanism,

Figure 7, is a section 77 of Figure 6,

Figure 8, is a section taken on the line 88 of Figure 7, and l Figure 9, is an enlarged perspective of the looper, needle and a portion of the feed ing disks, showing the movements taken by the looper during a loop forming operation.

Referring to the drawings in detail, and in particular to Figures 1, 2 and 3, the machine comprises essentially, a main frame, 10, formed with sidewalls, l1, and-front and rear walls 12 and 13, respectively, a top cover 14, and a front cover 15, which are held in place in any suitable manner.

The top cover is provided with the usual drag member 16, over which the thread is passed to the needle from the spool 17 sup ported on a suitable bracket, 18, at the rear of the machine. The machine is provided with a main drive shaft 19, which carries on one end a fly wheel 20, having formed therein, a belt flange21, over which operates a belt 22, connecting the fly wheel with a suitable motor 28, from which the machine taken on the line is driven. The front of the machine frame 10, is providedwith a protuberant portion 24, in which is housed the feeding mecha, nism which actuates the feed disk 25, which in conjunction with its opposed idler disk 26, operates to feed the fur 27, to be sewn transversely across the path of the needle 28. The needle is carried in the headed portion 29 of the needle bar 30, said bar pro,- jecting rearwardly through the front and rear walls 12 and 13, of the casing.

Above the needle bar, the e is supported alooper bar 81, which consists of a square bar having the rear end thereof turned down to provide a pin portion 32, which passes through a pivotally mounted pin 33, held in two flanged portions formed on the upper surface of the rear wall of theorising.

The front end of the bar is disposed htween two like portions, 34., formed on the top of the front wall 12. The forward tion of the looper bar is provided with a bore into which revolubly fits the shank of a looper chuck 35, the looper 36. itself, being releasably held in said chuck. The looper bar is provided with a cut out portion 87, into which the chuck shank extends, at which point said shank is secur engaged by a forked member 38, the forked end of which [its over a looper rating bar 39 which is also loosely held in two flanged portions 4-0 and a1.

The needle bar in that portion which lies immediately over the drivi. shaft has cured thereto a yoke having a portion 43, and an extended portion 514-, the extended portion underlying the looper operating bar 39. The extended portion of the yoke is bored to receive a vertical pin 45, which is pivotally secured in an enlarged slotted portion 46 of the operating bar 39. The looper bar has affixed on one side thereof, a cam d7, over which rides a roller L8, carried on the end of a frame i9, which is secured to the operating bar 39. It is apparent therefore, that any movement of the roller will cause an upward movement of the looper operating bar 39, about its pivotal connecting point with the vertical pin 45. This upward movement of the operating bar 39 will rock the forked-mini 38, which in turn will cause a revolving movement of the chuck shank, and accordingly the looper 36.

In order that the needle bar may be moved forwardly and rearwardly. I provide on the drive shaft, an eccentric cam which engages the lower forked end or an operating lever 51, which is pivoted in the side wall of the casing as at 52. The upper end of the lever 51 carries a roller 53, which lies within the cut out portion 1-3 of the yoke 42. It is apparent then that a revolving movement of the drive shaft produces an oscillation of the upper end or roller 53 of the lever which in turn moves the yoke and its connected parts forwardly and rearwa'rdly, the looper operating bar 59, partaking of this moven'lent also, as it is i'ixed to the yoke through the medium of the pin l5. v

The driving shaft 19 also carries adjacent one end thereof, an eccentric cam 54, sur rounded by a strip member 55, to which is pivotally connected the extended portion 56, of a sleeve 57', the sleeve being also provided with another extension 58, which is silitably pivoted in the side wall of the eas- 111g as "M59. The sleeve 57 forms the house ing for an operating plunger 60, which carries on its lower end a roller 61, adapted to travel over a cam 62, afiixed to the side wall of the casing as at 63. This plunger-6i). is provided with an enlarged portion 64, which closes the mouth of the sleeve and presents a bearing against which an expansible coil spring 65, operates to tend to force the plun- 60 out of the sleeve 57. The plunger 60 passes through the upper end of the sleeve 57, and is threaded to engage a suitable head 66, through which passes a pivot pin 67, to hold the plunger 60, and its associated parts in pivotal relation with a boss 68, formed on the side of the looper bar.

It will be seen that when the cam 54:. revolves it will not only cause a rocking movement of the sleeve and plunger, but will also cause the roller 61 on the lower end of the plunger to ride over the cam surface 62, so that during a pivotal movement of the sleeve 57, there will also be a longitudinal movement of the plunger relatively to said sleeve. This movement is of great importance, inasmuch as it actuates the looper bar in its raising and lowering movements, and also in its movements of advance and retraction. A look nut 69 allows for any adjustment of the throw of the looper bar in vertical direction.

The feed mechanism consists as before stated of two disks 25 and 26, the former of which, (see Figure 7), is carried on the upper end of a vertical shaft 70, the lower end of the shaft being journaled in the base of the frame and carrying adjacent that portion a cup member 71, which is fixedly secured to the shaft 70; Disposed within the cup is a ratchet wheel 72, provided with the usual teeth 7 3 which touch the inner wall of the cup and provide receptacles between the teeth for vertically disposed loose pins Tel, which act as wedges when the ratchet member 72 moved in. the direction indicated by the arrow in Figure 6. Tu order to operate the ratchet, I provide an arm, 75, extending rearwardly therefrom, to engage a link '76, which is pivotally carried on the overturned end of a vertical rod 77, which itself is carried in a sleeve 78, pivota lly connerted to said wall of the casing through the medium of a threaded bolt 78, carrying on its outer end a thumb screw 80, the bolt 78' operating in a suitable vertical slot 81. The vertical arm 77 is also engaged by the end of a cam lever 82. which terminates in a strip surrounding a cam 83, carried on the drive shaft 19. VViththis construction, it is possible to operate the driven disk 25 in a step by step motion, and also to vary the amount of the feed, so that a longer or shorter distance may be provided between stitches when applied to the material. In order to provide this adjustment. it' simply necessary to release the thumb screw ion 80, and move the bar 77 up or down. This movement shortens the distance between the centers of the lever 76; and the drive shaft 19, and therefore allows a more or less free perform the feeding movement of the disk.

The mating or idler disk 26 is carried on the end of a supporting arm 84, which passes rearwardly through the front and back walls of the casing and is provided interiorly thereof witha fixed washer 85 against which a coil spring 86 acts to normally retain the disk 26 in contact with the disk 25. In order toprevent revolving of the arm 84, I connect the same through the medium of a strip 87, to a fixed pin 88, disposed in the real-wall of the casing immediately below the said arm 84. p The strip 87 is secured to the arm 84:,and encompasses the pin 88 with which it has sliding contact. To the side wall of the casing, I pivot a bell-crank 89, the upper end of which is forked to engage the projecting pins 90 fixed in said arm 84, the lower end of the bell-crank being connected by a chain 91, to a foot lever (not shown.) which will cause when depressed, a forward movement of the top of the bellcrank, to move the arm 84 forwardly and the disk 26, away from the operating disk 25.

The operation of the machine is as follows: The turning of the main drive shaft 19 oscillates the lever 51 which in turn reciprocates the needle bar. the needle carried thereby travelling across the peripheries of the feed disks and into a usual needle hold plate. The reciprocation of the needle bar is simultaneous with the reciprocation of the looper operating bar 39. The plunger 60 is moved across the face of the cam 62, so that the said plunger and its associated parts cause reciprocation of the looper bar while the vertical movements of the plunger as it travels over the cam causes a vertical pivotal movement of the looper bar. This combination of vertical and horizontal movements impart to the looper as shown in Figure 9, the necessary path to form the loop in the thread wherebv the material is held together. In the forward movement of the looper operating bar, it is raised about its pivot point with the yoke through the me dium of the cam 47 on the side of the looper bar, over which the roller 48 secured to the looper operating bar travels; This raising movement of the looper operating bar imparts to the looper a revolving movement through the medium of the forked arm 38. It can be seen upon reference to Figure 3, that the placing of the cam 62 and pivot point- 59 will give the desired movement to porting arm and slidably the end of the looper bar, also the shape of the cam 47 will impart the necessary rotary movement to the looper. In order to vary the length of stitch used in sewing the material, the thumb screw at the side of the machine is raised or lowered so that the linle age associated therewith, will move through a greater or less distance to impart to the ratchet 72a variable movement. In taking the goods from the machine, or placing it therein, a suitable foottreadle (not shown). is usedto' draw down upon the chain to cause a forward movement of the idler disk support, this movement separatingthe two disks. It will be noted that the edges of both disks are serrated so that the goods are forcibly gripped and fed transversely of the needle. A suitable attachment may be provided for causing a drag on the thread adjacent the needle so that the same will be held upon a withdrawal movement of the needle to form an eye in the thread so that the looper may engage the same to-form a loop. This feature has not been shown inasmuch as it is believed to be a common expedient in the art.

Having described my invention, what I claim is:

1. A fur sewing machine comprising a looper, a looper bar in which the looper is held, a drive shaft, an eccentric on said drive shaft, a cam, a pivoted member having its lower end connected to and operated by said eccentric and its upper end connected to the loo-perbar whereby the latter is advanced and retracted, and an operating plunger in the pivoted member, the lower end of which rides over said cam to raise and :lower said looper bar.

2. A fur sewing machine comprising a looper, a looper bar therefor, a pivoted shaft adjacent said bar, a cam on; the bar, a cam arm on said shaft, means for advancing the looper bar, and means for advancing the shaft, and means engaging said shaft for causing a revolving movement of the looper during an advance movement of the looper I bar.

3. A' fur sewing machine comprising a frame, material feeding disks, means for driving one of said disks, a supporting arm for the other disk extending into the frame, a bar fixed in said frame, a strap fixedly connected at one end to the free disk supassociated with the bar at its opposite end, a spring associated with the support arm for normally maintaining the free disk in contact with the driving disk, and means for moving said sup-port arm to separate the disks.

4. A fur sewing machine comprising a needle bar, a looper bar, a looper carried in said looper bar, a cam on said looper bar, a yoke on the needle bar, a looper operating bar pivotally mounted on said yoke, means associated with the cam for causing vertical movement of said operating bar and an arm connecting the operating bar and the looper whereby a revolving movement of the looper is obtained.

5. A fur sewing machine comprising a looper bar, a pivotally mounted operating plunger associated therewith and having at its lower end a roller, a stationary cam over which said roller operates, a. rotary cam and an arm connecting the rotary cam and the plunger for causing a reciprocatory movement of said roller .over the face of said stationary cam whereby the looper bar is raised or lowered.

6. A fur sewing machine comprising a looper holding bar, a looper revolubly associated therewith, a needlebar, alo'oper operating bar adjacent the looper holding bar, a cam on said holding bar, means for reciprocating the needle and looper operating bars simultaneously, and means on said operating bar adapted to engage said cam for causing rotatable movement of the looper.

7. A fur sewing machine comprising a looper bar, a cam, a plunger connected to the looper bar, the lower end of which is adapted to ride over said cam, a pivotally supported sleeve in which said plunger is slidably held and means for oscillating said sleeve whereby the plunger will be caused to ride over said cam to cause a vertical movement of the looper bar.

8. A fur sewing machine comprising a needle bar, a looper holding bar a looper operating bar, a pivoted lever for operating the looper operating bar and the needle bar a pivoted plunger for operating the looper holding bar, meansonthe looper holding bar for causing a vertical movement of the looper operating bar, and a cam over which the plunger is adapted to move whereby vertical movement of the looper holding bar is obtained.

HARRY ROSS.

Images