US767931A - Feed mechanism for sewing-machines. - Google Patents

Description

PATENTED AUG. 16, 1904.

J. G. FOGARTY. FEED MEGHANISM POR SEWING MACHINES.

APPLICATION FILED JULY 19, 1903.

NO MODEL.

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UNITED STATES Patented August 16, 1904.

PATENT OFFICE.

JOHN C. FOGARTY, OF NEW HARTFORD, NEW YORK, ASSIGNOR OF ONE,- HALF TO MAXWELL MFG. OO., OF NEW HARTFORD, NEI/V YORK.

FEED IVIECHANISNI FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 767,931, dated August 16, 1904. Application filed .Iuly 18, 1903. Serial No. 166,116. (No model.)

T0 all whom it may concern:

Be it known that I, JOHN C. FOGARTY, of New Hartford, in the county of Oneida and State of New York, have invented certain new and useful Improvements in Feed Mechanisms for SeWing-lachines; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in theart to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form part of this specification.

The obj ect of my invention is to provide two sets of work-feeding mechanisms for sewingmachines, having means for conveniently and without stopping the machine controlling the operation, so that the feeds will feed together or differently, as desired.

In the drawings, Figure 1 shows a perspective view of portions of a sewing-machine embodying the features of my invention. Fig. 2 shows a plan view, partiallyin section, showing the feed mechanisms andthe controlling devices therefor assembled. Fig. 3 is a plan view, Fig. 4 a side elevation, and Fig. 5 an end view, of one of the feed-dogs, together with the part of the mechanism on which it is mounted. Fig. 6 is a plan view, Fig. 7 a side elevation, and Fig. 8 an end view, of the other feed-dog, with the operative part on which it is mounted. Fig. 9 is a side elevation, and Fig. 10 a plan view, of one of the cam-stops employed in the construction, including the lever-handle. Fig. 1l is a side view, and Fig. 12 a plan view, of the other cam-stop employed in the construction. Fig. 13 is a plan view of the piece with its spindle, on which the parts shown in Figs. 9 and 11 are mounted. Fig. 14 is a side vand edge view of a spring-washer employed in the construction. Figs. 15, 16, and 17 show a side, edge, and plan view, respectively, of a pair of adjustable stops and mountings employed in the construction.

Referring to the reference figures in a more particular description, 1 indicates a portion of the frame of the machine which carries the main shaft 2, which has a bearing in the frame at 3. On the shaft 2 is a cam or eccentric 4.. This cam receives a short sleeve 5, which is substantially square on the outside. The shaft 2 beyond the cam 4 is adapted to carry the thread-hook, which is indicated at 6. The two feed-dogs 7 and 8 are mounted on the respective movable parts or feed- bars 9 and 10, which parts are similar in many of theirfeatures. The part 9 is forked at the forward end, as indicated at 9, to receive the cam-sleeve 5, in which it is free to slide or move toward the front of the machine to some extent and adapted to strike on the rear wall 9B when moving toward the rear. The rear end of the part 9 is forked to receive the xed pin 11 and the bushing 12, which surrounds the pin l1, and is free to slide backward and forward to a limited extent thereon. In a socket forward of the sleeve 12 there is provided a spring 13, operating to impel the part with the feed-dog 7 toward the front of the machine. The part lO is provided with a slot 10A, adapted to engage on the cam-sleeve 5, as before mentioned with reference to part 9, and is also provided with a forked rear end to receive the fixed pin 11 and the sleeve 14, similar to 12, before mentioned. This construction is also provided with a recess to receive a springV 15, which tends to force the part 10 toward the front of the machine.

Mounted on the larger portion of the fixed stud or pin 16 in front of and inline with the lower branch of the part 9 is the cam-stop 17. This stop is provided with a recess which receives the rawhide washer 17 a, against which the end of the part 9 is adapted to strike instead of on the metal of the part 17. The part 17 is also provided with a projecting lever-handle 17 B. The cam-stop 17 is practically an eccentric,and when thehandle thereof is in the upper position it allows the part 9 to follow the motion of the cam-sleeve 5 backward to the full extent of its movement, with the wall 9B resting continuously against the side of the cam-sleeve 5. When the handle 17E-is depressed to bring the thicker portion of the eccentric between its pivot and the rearend of the part 9, the movement of the `part 9 with the dog 7 forwardly under the impulse of the spring 13 will belimited,

The stop 18 is arranged in position to engage the forward end of the lower branch of the part and limit the forward movement of the part 10 with the feed-dog 8 at such point as may be desired. The nut 2O secures the cam-stop 18 on the pin. Between the stop 18 and the stop 17 is introduced aspring-washer 21, which serves to afford some friction for the cam-stop 17, so that it will maintain itself in any position to which it has been adjusted. Av similar washer is introduced between the nut 20 and the stop 18. At the sides of the stops 17 and 18 there are arranged slotted pieces 22 22, spaced by posts and provided with an ear, by means of which they are secured on the frame, as shown in Figs. 16, 17, and 2. In these slotted pieces are provided two adjustable stops 23 and 24, projecting, respectively, on the upper and lower sides of the leverhandles of the stops. By adjusting these stops 28 and 24 in the slot the amount of movement in the cam-stops may be controlled,

so that the operator in manipulating the same need give no attention to the degree of movement, simply moving the lever in either direction.

In putting on binding and in other places it is often desirable to feed the goods faster than the binding, and then, again, it is desirable to feed the binding faster than the goods in order to produce fullness in one part or the other. This often occurs in the same seam or run, and it is desirable to have a machine constructed and so under the control of the operator that the changes can be made without delay or without stopping the machine. When the machine described has been properly adjusted for the work in hand, the operator can get the changed result by throwing one or the other of the lever-handles 17B and 18B up or down, as circumstances require, without stopping the operation of the Inachine. When down, the cam-stops serve to block the forward movement of the feed-dogs 7 at a limited point, and of course on the feeding movement these dogs will operate to a less degree than the other one. The adjustment can be so that the two dogs will feed at the same speed or so that one will' feed faster than the other. In short, any relative feeds of these two dogs are completely under control.

By reference to Fig. 2 of the drawings it will be seen that the two independent feeddogs 7 and 8 are arranged to work practically or approximately side by side or in different lateral planes relative to the direction of the feed of the work and are thus adapted to engage different pieces of material being fed to the machine and which may be disposed in different lateral planes, as is necessary in feeding' a binding and an uncovered part of a piece of goods to which it is to be attached through the sewing-machine. This arrangement of the independently operating or independently-adjustable feed-dogs in differentlateral planes thus renders possible the differential feeding of a binding and the goods above referred to, so that the two independently-adjustable feed-dogs may be so speeded relative to each other that either the binding or the goods may be fed the faster, according as it may be desired to give fullness to the one or the other. As the feed-regulating devices are both mounted on a stationary part of the machine, the feeding movements of either feed-dog may be varied while the machine is running at full speed, as will be obvious.

` It is evident that modifications and changes in and from the construction herein described may be made without departing from the spirit of my invention.

VVhatI claim as new, and desire to secure by Letters Patent, is-

1. In a sewing-machine, the combination with two independent feed-dogs arranged to work side by side, or approximately so, of means for operating said feed-dogs, and two feed-adjusting cam-levers, onefor each of said .feed-dogs, mounted side by side on a pin iixed to the front side of the frame of the machine and thus conveniently accessible to the attendant; whereby the feeding movements of the said feed-dogs may be independently varied while the machine is in operation.

2. In a sewing-machine, the combination with two independent feed-bars each of which is provided with a feed-dog, of an' eccentric for lifting and imparting forward or feeding movements to the said feed-bars, an independent spring for effecting the return or backward movements of each of said feed-bars, two feed-adjusting cam-levers mounted on a stationary part of the sewing-machine and each of which serves as an independent stop for regulating the return movements of each of the said feed-bars, and which cam-levers are provided with handles by which they may be independentlymanipulated to cause either one of the feed-dogs to have longer or shorter feeding movements than the other, and adjustable stops for limiting the movements of the handles of each of the said cam-levers independently of the other.

3. vIn a sewing-machine, the combination with two independent feed-bars each of which is provided with afeed-dog, of a single eccentric for imparting forward or feeding'movements to the said feed-bars, an independent spring for effecting the return or backward movements of each of the said feed-bars, two feed-adjusting cam-levers mounted on a fixed stud and serving as adjustable stops for independently regulating the return movements of the feed-bars, each of said cam-levers be- IOO IIO

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ing provided with a handle by which it may In witness whereof I have afxed my signabe independently manipulated, two adjustable ture, in presence of two witnesses, this 10th stops arranged in the path of movement of day of July, 1903.

each of the said handles and by which the JOHN C. FOGARTY. 5 feed-regulating movements of said handles Witnesses:

may be independently limited in each diree- CHARLES G. IRISH,

tion. E. S. HEssE.

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