US724110A

US724110A - Overedge sewing-machine.

Info

Publication number: US724110A
Application number: US3009200D
Authority: US
Inventors: George Keyser; Jacob M Weber
Original assignee: JOHN W HEPWORTH
Current assignee: JOHN W HEPWORTH
Priority date: 1900-09-15
Filing date: 1900-09-15
Publication date: 1903-03-31
Anticipated expiration: 1920-03-31

Description

PTO-724,110. PATBNTED MAR. 31, 1903,

G. KEYSER & J. M. WEBER.

OVEREDGE SEWING MACHINE.

' APPLICATION FILED AUG. 17, 1901. no MODEL. a sHBE'w-sHEET 1.

Witnesses I nventorS Attorhey.

No. 724,110. BATENTED MAR.31 ,1903.'

V e. KEYSER & J. M. WEBER.

OVEREDGE SEWING MACHINE.

APPLICATION FILED AU}. 17. 1901. no MODEL. v s sums-sum a.

(Si GL ttorney.

No. 724,110. PA'IENTED MAR. 31, 1903.

GJKEYSER & J. M. WEBER.

OVEREDGE SEWING MACHINE.

APPLICATION FILED Aueln. 1901.

no MODEL. Y a sums-sum a.

' & M y

10 16 220 I Witnesses. Inven tQn S UNITED STATES;

P TENT OFFICE.

GEORGE KEYSER AND JACOB M; whens, on PHILADELPHIA, PENNSYL- VANIA, ASSIGNORS TO JOHN W. HEPWORTH, on PHILADELPHIA,

PENNSYLVANIA.

SPECIFICATION forming part of Letters Patent No. 724,1 10, dated March 31, 1903.

No. 72,329- (No model.)

@riginal application filed September 15, 1900, Serial No. 30,092-- Divided and this application filed August 17, 1901. Serial To 00% whom it may concern/.-

Be it known that we, GEORGE KEYSER and i JACOB M. WEBER, citizens of the United States, residing in the city and county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Overedge Sewing-Machines, of which the following is a specification.

The present application is a division of the application filed by us September 15, 1900, Serial No. 30,092, for certain improvements in overedge sewing-machines.

The subject of this case relates more especially to the feed mechanism of such machines, our objects being, first, to provide novel mechanism for intermittently rotating the feed disks or cups and for regulating the movement of the latter; secondly, to provide novel means for separating said disks or cups and at the same time releasing the threads from tension, whereby the fabric, with its threads, may be readily removed from the machine; thirdly, to provide a novel construction of devices for uncurling the edges of the fabric during their passage to the feed (16-; vices, and, finally, to provide various novell features of construction and combinations of parts, which will be hereinafter described and claimed.

In the drawings, Fig-urel is a side elevation, partly in section, of'an overedge sewingmachine embodying our invention. Fig. 2 is an end elevation thereof, also partly in section. Fig. 3 is an elevation of the uncurler?" 'd-etached. Fig. 4 is an edge view thereof, partly in section. Fig. 5 is a sectional detail as on the line 0 of Fig. 3. Fig. 6 is a similar detail showing parts of the mechanism for actuating the clutch-disks. Fig. 7 is a sectional detail as on the line at d of Fig. 6. Fig. 8 is a plan of the clutch device, partly in section. Fig. 9 is a vertical section as on the line e e of Fig. 8.

The main frame comprises the bed-plate 1 and the standards 2 and 3 thereon. The bedplate is preferably hinged at its rearward 'edge, as at 4, to a basal casing 5, in which the depending parts of the mechanism are covered and concealed when the machine is in working condition. By swinging the bedplate upwardly the underlying parts thereon will be exposed and readily accessible, as oocasion may require.

The main shaft 6 has its bearings-in appropriate boxes in the lateral members of the standard 3 and is provided with a drivingpulley 7, whereby it may be driven from a suitable source of power.

The usual feed'cups or disks 8 9, by and be- I tween which the edges of the fabric to be united are progressively fed to the stitching mechanism, are supported upon vertical shafts 10 11, mounted at the forward end of the bed-plate. The shaft 10 is journaled in a column 12, rising from the bed-plate, while the other shaft 11 is affixed at its lower end to an oscillatory frame 13, mounted below the plate, for a purpose below described.

The disk 9 is provided with an elongated hub 14, which extends through an opening in the bed-plate andcarries a gear-wheel15,

which coacts with a corresponding gear 16 on the shaft 10, whereby the latter, with its disk, and the hublt, with its disk, may be concurrently driven in opposite directions to each other. o

Afdxed to the shaft 10 at a point below its gear-16 is a drum 17, upon the hub 18 of which are loosely mountedtwo rocking levers 1.9 20, disposed above and below the drum, respectively. The inner arms of these levers are bifurcated to afiord jaws 21, which embrace the opposing edges of the drum, and the openings 22 in said arms are slightly elongated in opposite directions to each other.

The outer arm of the lever 20 is extended and is pivoted at or near its free extremity to a post 23,depending from the bed-plate. The outer arm of the upper lever is formed with an up-projecting lug24, provided with a laterally-disposed ball 25, which is fitted to the socketed end 26 of a link 27. The opposite end ofv the latter is equipped with a pivotstud 28, which is slidingly fitted to a vertical slot 29 in an oscillatory arm 30, pivoted at its upper end to the standard 3, as at 31. This arm has a rectangular opening 32 therein for the reception of an eccentric 33 on the main shaft,whereby d uring the rotation of the latter said arm is oscillated, corresponding motion being transmitted by the link connection to the lever 19. During the oscillations of this lever the jaws thereof in their forward eccentric movement, due to the slot connection with the hub of the drum, bite the opposing portions of the drum and correspondingly advance the latter, the jaws of the lower lever, owing to the opposite disposition of its slot, permitting the advance movement of the drum by the lever 19, yet preventing its rearward movement during the back strokes of the latter lever. The lower lever thus serves as a back-stop. By this construction it will be seen that the drum 17 and its shaft 10 are intermittently rotated and that in consequence the two feed-disks are simultaneously impelled.

As a simple and efficient means whereby the step-by-step movement of the feed-disks may be regulated, so as to correspondingly determine the feed of the fabric therebetween and perforce the length of the stitches, we provide a means whereby the pivot-stud 28 may be adjusted longitudinally of the slotted arm, the position of such stud'in relation to the axis of the arm determining the throw of the clutch-lever. To this end we dispose adjacent to the link27 an arm 34, which is carried by a vertically-movable rod 35, extending, through the standard 3. This rod is provided with lateral setscrews 36, which extend through a vertical slot 37 in the standard, so that if such screw be properly manipulated the rod maybe loosened and vertically adjusted and then be secured in its position of adjustment. The free end of the arm 3st lies adjacent to the pivot-stud 28 and is provided with a horizontal slot or recess 38 to receive the extended end of said stud. Hence when the arm 34: is vertically adjusted the stud will be raised or lowered thereby longitudinally of the oscillatory arm, the slot or recess in the arm 34 permitting the free horizontal movementof the stud as it is actuated by the arm 30.

The needle 39 is horizontally reciprocated across the bite of the two feed-disks, so as to penetrate the interposed edges of the fabric to be united. In the mechanism herein illustrated this needle is carried by the free end of a bar40, which is fitted to horizontal guides etl on the standard 2. On the baris a lug 42, which is connected by means of a link 43 with the upper end of an oscillatory frame 44. This frame is fulcrum ed on a transverse shaft 45, supported by brackets on the under side of the bed-plate, and is provided with a pair of vertical members 46, which embrace an cecentric 47 on the main shaft, whereby during the rotationof the latter the frame is contin uously reciprocated.

The thread on its way to the needle passes throughaspring-controlled tension device 61,

supported on a bracket 62 at the rear of the machine, thence through eyes 63 in the vertical members of a guide-bracket 6t and eyes 65 in the free end of a take-up lever 66, interposed between such members, thence to the needle. The take-up lever is pivoted at its rearward end between lugs 67 on the standard 2 of the main frame and is connected at a point between its ends with the upper end of a rod 68, which is coupled at its lower end by means of a strap 69 with an eccentric 70 on the main shaft, whereby during the opera tion of the machine the said lever is continuously oscillated in a manner to take up the slack thread during the reciprocations of the needle.

The looper 71 is arranged above the feeddisks and is actuated in respect to the needle to accomplish the requisite enchainment of the looper and needle threads for the formation of the stitches upon the edges of the fabric. The looper has, as usual, a rising-andfalling motion, a forward-and-back motion, and also aslight lateral motion, the whole being properly timed relatively to the reciprocations of the needle.

The thread 83 on its way to the looper passes through a spring-controlled tension device 84, arranged adjacent to the tension device 61, above referred to, thence through eyes 85 in laterally-extending lugs 86 87 on the take-up and looper levers, respectively, thence to the looper. Hence during the actuation of the looper the slack of the looper-thread is taken up by the oscillating take-up lever.

The tension devices for the needle and looper threads are identical with each other, both in construction and operation. Each of these devices comprises a pair of superposed disks 88, through which extends a vertical rod 89, slidingly fitted to a perforated boss 90 in the bracket 62. The lower disk rests upon the boss, while a shoulder9l on the rod bears upon the upper disk, the rod being maintained yieldingly depressed by a spiral spring 92, which encircling the rod bears against the under side of the bracket and against a shoulder 93 on the lower extremity of the rod. The disks being thus maintained yieldingly in contact with each other exert sufficient tension upon the thread passing between the same. It will be seen that if the rod be raised against the pressure of the spring the thread will be released.

As above stated, the shaft 11, which supports the outer feed-disk 9, is carried by an oscillatory frame 13, mounted below the bedplate. This frame comprises a transverse bar 94, provided at its respective ends with rearwardly and upwardly projecting lugs 95, which are pivoted to depending lugs 96 on the bed-plate. The bar is also provided at one end thereof with a depending extension 97, which is connected by means of a link 98 with the shorter arm of a bell-crank lever 99, pivoted to a depending lug 100 near the rearward end of the bed plate. The lever is maintained in a normal position by a suitably-disposed spring 101. On the pivot-stud 102 of the lever is a rearwardly-extending toe 103, upon which rests the lower end of a vertically-movable rod 104, that extends through a guide-lug 105 on the standard 2 of the main frame and through an orifice in the bed-plate. On the upper end of this rod is a cross-piece 106, that lies directly below the rods 89 of the two tension devices. By this construction it will be seen that if the longer arm of. the lever 99 be depressed against the action of the spring the frame 13 Will be tilted, so as to incline the shaft 11 and throw the overlying feed-disk away from the inner feed-disk in a manner to free the interposed fabric and that at the same time the too 103 being raised will elevate the rod 104, with its cross-piece, and thereby lift the rods 89 and-free the threads in the tension devices, whereupon the fabric, with the connected threads, may be readily drawn from the machine.

The lever 99 may be depressed by means of a suitable treadle (not shown) connected therewith by a rod 107.

It will be observed that the axis of oscillation of the frame 13 is rearward of the vertical axis of the shaft 11, so that when the frame is tilted to incline the latter the feeddisk thereon will be swung in a downward arc to lie below the path of the needle. Hence if the needle should happen to be reciprocated when the disks are separated there will be no liability of injurious contact of the needle with the outer disk.

The device for uncurling the edges of the fabric as they are delivered to the bite of the feed-disks differs but slightly from prior constructions, the novel features residing in projections or abutments by means of which the proper delivery of the curled edges of the fabric to the uncurling members is insured even though the fabric be improperly guided by the attendant.

The uncurling device comprises a divisionarm 108, depending from the free end of a horizontal rod or shaft 109, extending from a bracket 110 on the main frame. The lower end of this arm lies just in advance of the bite of the feed-disks and is made quite thin and extended forwardly in respect to this bite, as indicated at 111. The device also comprises two depending arms 112, arranged on the respective sides of the arms 108 and hinged at their upper ends to the latter. The lower ends of these lateral arms also lie just in advance of the bite of the feedcup, and they are made quite thin and extended forwardly, the extensions being defiected laterally, as at 113, and being provided with lateral uncurling members 114. Between the two lateral arms is a spring 115, which tends normally to separate them from the central member, each of the arms being provided with a set-screw 116,whereby it may be adjusted toward and from such memberfor the purpose of regulating the intervening space. As usual, the edges of the fabric on their passage to the feed-disks are guided be tween the lower flattened end of the central arm and the deflected ends of the lateral arms, respectively, so that the uncurling members on the latter will progressively receive and straighten the opposing curled edges of the fabric. To insure the proper guidance of the edges to these uncurling members, we provide the central arm with a transverse pin 117, which affords abutments directly forwardly of the members 114:. As the fabric is fed inward it bears against the opposing abutments and is positively directed in a straight line to the uncurling members, and this though the delivery of the fabric by the attendant be somewhat irregular.

We claim-- 1. In an overedge sewing-machine, the combination with the feed-disks and their shafts, of devices forintermittently rotating one of said shafts, a longitudinally-slotted oscillating arm, means for oscillating said arm, a link pivotally connected with said devices, a pivotpin extending through said link and the slot in the arm, a vertically-adjustable arm pro.

vided with a slot or recess into which the pin extends, and means for vertically adjusting said arm, substantially as described.

2. In an overedge sewing-machine, the com bination with the needle and looper mechanism, tension devices for the needle and looper threads, the feed-disks, their shafts or supports, and means for moving one of said shafts or supports relatively to the other and for opening the tension devices, substantially as described.

3. In an overedge sewing-machine, the combination with the needle and looper mechanisms, tension devices for the needle and looper threads, the feed-disks, their shafts or supports, a movable frame for one of said shafts or supports, a lever, a link connection between the same and said frame, and connections between said lever and the tension devices, substantially as described' I 4. In an overedge'sewing-machine, the combination with the feed-disks, of the curling device adjacent thereto, including the central division member, the lateral members with uncurling portions, and studs or abutments on the central member'arranged in close relation to said uncurling portions, substantially as described.

In testimony whereof we affix our signatures in presence of two witnesses.

GEORGE KEYSER. JACOB M. WEBER. Witnesses:

ALBERT P. MYERs, ANDREW V. GRoUPn.