US559637A

US559637A - Sewing-machine

Info

Publication number: US559637A
Authority: US
Publication date: 1896-05-05
Anticipated expiration: 1913-05-05

Description

2 Sheets-Sheet 1.

(No Model.)

L. W. TRACY. SEWING MAGHINE.

Pa tented May 5, 1896.

INVENTUR WITNESSES:

ATTORNEY ANDREW BANANA! PHOTO UYNQWASHINGTDNJC 2 Sheets-Sheet 2.

(No Model.)

L. W. TRACY. SEWING MACHINE ATTORNEY UNITED STATES PATENT EEicE.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent NO. 559,637, dated May 5, 1896.

Application filed June 13, 1895. fierial NO- 552,632.. (No model.)

To all whont it may concern.-

Be it known that I, LEWIS XV. TRACY, a citizen of the United States, and a resident of Brooklyn, county of Kings, State of New York, have invented certain new and useful Improvements in Sewing-Machines, of which the following is a specification.

The improvements in sewing machines forming the subject of this invention relate particularly to a feed and feed mechanism and pressenfoot mechanism and means for operating the same.

The object of the invention is to provide a feeding device for sewing-machines that embodies all of the essential operating features of a perfect feeding devicethat is, one acting rectilinearly on the goods to feed them under the needle, moving away from and backwardly clear of the goods, and then coming again in contact with the goods-and is simple in construction, inexpensive to make, and adapted for use in the cheaper kinds of machines and hand-driven machines. This I accomplish by constructing the feeding device to act as an over-table feed and to act independently of the presser-foot, both of these devices and their operating mechanisms being attached to the head of the machine, or that part which lies over the table and carries the needle-bar, and both of them are actuatedby the needle-bar, the improvements in the presser-foot mechanism being such that it is lifted and held clear of the goods while the feeding device is moving the goods, and is allowed to press on and hold the goods during the backward movement of the feeding device and while the needle is passing through the goods.

The invention also embraces simple means for raising the feeding device and the presserfoot away from the table for the admission and removal of the goods to and from the machine.

All of these and other improvements will be hereinafter described by reference to the accompanying drawings, in which- Figure 1 is a side elevation of a hand-power sewingmrachine embodying my improvements. Fig. 2 is a front elevation of the same, partly in section, on the line 2 2, Fig. 1. Fig. 3 is a side view of the head, taken on the line 3 3, Fig. 2, showing the presser-foot mechanism with the presser-foot down. Fig. 4 is a similar view showing the presscr-foot raised from the table. Fig. 5 is a view showing the other side of the head and the feeding mechanism with the feeding device raised. Fig. 6 is a similar view showing the feeding device down. Fig. 7 is a vertical section of the head, showing the presser-foot; and Fig. 8 is an underneath view of the lower thread carrying and looping mechanism.

lVhile the class and style of machine shown in the drawings is one well adapted to have my improvements applied thereto, it will be understood that the said improvements may be easily applied to, and properly perform their functions on, any class or style of sewing machine having a reciprocating needle-bar.

In the machine shown a represents the bed or table provided with a clamp a, by which the machine may be attached to a bench or other suitable place. In the dependent bracket a is fitted the shaft 1), provided with the crankhandle b and having the eccentric b which actuates the eccentric-rod I). On the side of the eccentric b is a grooved cam, in which works a roller attached to the sliding bar 0. This bar a is joined at one end by a pivotal connection to the short arm of the lever c, which is fitted to rock on the stud 0 projecting from the under side of the table a. A link connects the other end of the lever c to the rocking arm d,which carries the curved needle 01, arranged to play by the side of the needle when it passes through the hole a in the table, and so form the stitches with the thread carried by the needle and the thread carried by itself. This latter thread is supplied from the spool (1 The head 6 is carried by or forms part of the arm or frame e, and in a groove e formed on its rear side, (see Fig. 7,) is fitted to slide the needle-bar f, to which the needle f is clamped in an ordinary manner. is provided with a slot in which works a pin on the end of the rocking arm 9 and is caused to be reciprocated thereby, said arm 9 being pivoted at g to the table a and pivoted to the upper end of the eccentric-rod D The thread for the needle f is supplied from the spool f As shown in the drawings, the presser-foot 7b and feeding .device i are side by side and both above the tablea, the end of the prcsser- This barf foot being in the path of the needle f and perforated or slotted for the needle to pass through it. The presser-foot is carried by the bar h, fitted to slide, by its enlarged lower end, in a vertical bore in the head 6 and, by its upwardly-extending rod, in the bridgepiece 6 On this rod is placed the compression-spring 7L acting between the enlarged part of h and the bridge-piece c to press the foot down. Around the rod of the bar 71 and resting on the bridge-piece e is a springj, somewhat weaker than the spring 71 and on the top of this springj rests the horizontallybent end of the bar j, which is held on the side of the head 9 by screws in such manner as to have vertical play thereon. To the side of the upper end of the rod of the bar h is pivoted the dog or lever 7c, whose side rests on the top of the bent end of the barj, as

shown in Figs. 2, 5, and 6'.

The means for raising the presser-foot consist of a small lever Z, pivoted at Z on a pin projecting from the bar h through a slot in the head 6, a stud or lug m projecting from the head, and shown adj ustably attached thereto, on which rests the short arm or tappet Z of the lever, and a stud or lug m projecting from the side of the ncedle-bar f in such manner as to act on the bent upper end of the lever 1 when the needle-bar is moving into its upper position, thereby lifting the presser-foot h and holding it up when the needle is raised, as shown at Fig. 4, by reason of the tappet Z bearing on the lug m. lVhen the needle descends, the lug m moves away from the lever Z and allows the presser foot to be depressed by its springh as shown at Fig. 5.

The feeding device '5, formed as shown, having a serrated or roughened under surface to act on the goods, is supported at two points,

' one at its central part by a pivotal connection to the lower end of the lever n, and the other at its end, which is offset from the serrated part, by a horizontally-arranged sliding connection to the lower end of the bar 7". The lever a is fitted to rock at a on astud or other bearing projecting from the head 6, and its upper end is provided with an adjustable pin or slide 0, arranged to play in a slot formed in the plate 19 and be actuated thereby. This plate 13 is fitted to rock on the bearing or stud p, projecting from the head 6 about in line over the stud or bearing 11, and on its edge adjacent to the needle-bar f is formed an upper projection 19 and a lower inclined face against which projection and face the stud or lug q, extending from the side of the neoble-bar f, works when the needle-bar is reciprocated.

During the lower part of the movement of the needle-bar f, or when the needle f is in the goods, the lug q is acting against the face 19 of the plate 1), and through the medium of the lever it moves the feed i backwardly for a fresh grip on the goods, the feed 1' being at this time raised clear of the goods by the dedescribed, as shown at Fig. 6.

pression of the bar 3', which is carried down by the dog It bearing on the top of the bar 7,

as at this time the presser-foot is depressed by its spring 71 as shown at Fig. 5.

When the needle-bar f is moving into its upper position with the needle out of the goods, the lug q acts on the projection 19 of the plate 19 and so moves the feed 2' forward, it now being pressed down on the goods as the bar j is raised by its spring j, the presserfoot h being at this time lifted up, as before The length of the feed is regulated by the adjustment of the pin or slide 0. Now when a piece of goods is to be placed in position for action of the machine or to be removed therefrom the handle of thedog 7a is raised, which first depresses the bar j, thereby lifting the feed 2', and brings the upper end of the bar j in contact with head 6 as the spring j is weaker than the spring 7L2 and then raises the presserfoot 7L, or the presser-foot will be held up if the needle-bar is in its highest position, thus leaving a clear space between the table a and the feeding device and presser-foot. It will be observed that the construction of these improved feeding and presser-foot mechanisms is such that these devices will properly I perform their functions whichever way the driving-shaft is turned, as their action depends solely on the reciprocation of the neodle-bar.

lVhat I claim as my invention is 1. In a sewing-machine, the combination of a reciprocating needle-bar, the head of the machine in which the needle-bar is fitted to work, means for actuating the needle-bar, a lever pivoted to the head, a feeding device pivoted at its central part to the lever and having teeth or serrations on its under side at one end and a horizontal slot at the other end; a pin or stud on which the slot of the feeding device works and means for actuating the lever directly from the needle-bar.

2. In a sewing-machine, the combination of a reciprocating needle-bar, the head of the machine in which the needle-bar is fitted to work, means for actuating the needle-bar, a lever pivoted to the head, a feeding device pivoted at its central part to the lever and having teeth or serrations on its under side at one end and a horizontal slot at the other end a bar fitted to slide vertically on the end, a pin or stud on which the slot works,

a lever pivoted to the head, and to which the feeding device is attached, and means for actuating the lever from the needle -bar, consisting of a plate pivoted to the head having projecting and inclined edges, a stud on the needle-ban arranged to work against said edges, and an adjustable pin or slide connecting the lever and the plate.

at. In a sewing-rnachine, the combination of avertically spring-actuated presser-foot, a lever pivoted thereto, a fixed lug on which one end of the lever bears, a reciprocatingneedlebar, a-stud carried thereby arranged to act on the other end of the lever to raise the resser-foot, and means for actuating the needle-bar; the head of the machine in which the presser-foot and needle-bar work and a plate ad j u stably attached to the head and carrying the lug, whereby the height that the presserfoot is raised by the needle-bar may be varied.

5. In a sewing-machine, the combination of a reciprocating needle-bar, the head of the machine in which it works, means for actuatin g it, a feeding device serrated on its lower side and carried by a lever pivoted to the head, and means for actuating the lever from the needle-bar; a spring-actuated presserfoot, a lever pivoted thereto, a lug attached to the head on which one end of the lever bears, and a stud carried by the needle-bar arranged to act on the other end of this lever to raise the presser-foot.

(i. In a sewing-machine, the combination of the head, a presser-foot having an upwardlycxtending rod passing through the head, a spring acting to press the presser-foot down, a bar fitted to slide vertically on the head with its upper end embracing the rod of the presser-foot, a spring acting to hold this bar up, a dog pivoted to the rod of the presser-foot spring acting to press the presser-foot down, a

a bar fitted to slide vertically on the head with its upper end embracing the rod of the presserfoot, a spring acting to hold this bar up, a dog pivoted to the rod of the presser-foot and arranged to act on the upper end of the sliding bar to depress it and also to raise the presserfoot, a feeding device held at its central part on a swinging pivot, serrated at one end on its under side and connected by a slot and pin at its other end to the lower end of the vertically-sliding bar, a reciprocating needle, means for actuating it, connections between the needle-bar and the presser-foot for raising the presser-foot and allowing the serrated face of the feeding device to fall, and means for moving the swinging pivot of the feeding device from the needle-bar.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 11th day of June,

LEWIS IV. TRACY. lVitnesses: CARROLL A. REIDY, ARTHUR O. BLATZ.