US240758A

US240758A - Chaeles b

Info

Publication number: US240758A
Authority: US
Publication date: 1881-04-26
Anticipated expiration: 1898-04-26

Description

GIHQPALMBR. Sewing Machine.

Patented April 26,1881.

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I s r: a s s E NPETERS, PHOTO LITHOGHAPKER, WASHINGTON D C UNITED STATES PATENT OFFICE.

CHARLES H. PALMER, OF NEW YORK, N. Y., ASSIGNOR TO THE PALMER STRAW SEWING MACHINE COMPANY, OF SAME PLACE.

SEWING- MACHINE.

SPECIFICATION forming part of Letters Patent No. 240,758, dated April 26, 1881, Application filed July 1, 1879.

To all whom it may concern Be it known that I, CHARLES H. PALMER, of New York city, in the State of New York, haveinvented certain new and useful Improvements relating to Sewing-Machines, of which the following is a specification.

The improved machine is intended more especially for sewing straw-braid or analogous narrow material, which is laid in a manner 1' 0 similar to straw-braid,with each breadth partly superposed upon the adjoiningbreadth. I sew them with a straight needle thrusting directly through both breadths, using a single thread formed in loops by a revolving looper.

The improvements relate to the devices for pressing upon the work and guiding it.

The accompanying drawings form a part of this specification, and represent a machine constructed according to my improvements.

Figure l is a general perspective view of the entire machine in condition for work, certain parts of the gages and work-plate being broken away to show the parts beyond. Figs. 2, 3, and

A 4 are views of certain portions on a larger scale, being sections across the braid near the point where the sewing is effected. Fig; 2 is a section on a line a little to the right of the center of the presser-wheel. It shows only the braid and the safety-gage. Fig. 3 shows the same 0 with some additional parts. Fig. 4 is a section in the plane of the center of the presser-wheel.

Similar letters of reference indicate like parts in all the figures.

A is the fixed frame-work, and A the goose- 3 5 neck or fixed arm thereof, which supports the top mechanism.

B is the needle-bar, carrying a straight reciprocatin g needle, I).

D is the main shaft, and it carries a looper,

d, on the end nearest the needle. A tubular shaft, M, loosely surrounds it, and revolves in a tubular bearing, N, which is adjusted up and down, turning on an axis, a, and adjusted by a screw, 0.

On the back end of the tubular shaft M is a ratchet-wheel, m, which serves to receive the motion. On the front end is a ratchet-wheel, m, which serves as a feed-wheel.

P is a lever vibrating loosely 011 the main 5o shaft D as a center. On one end it carries a pawl, which engages with the ratchet m. To

the other end is connected a link, Q, which is attached to an adjustable pin, R, in a slotted arm, T fixed on a rocking shaft, T. The latter receives a uniform rocking motion through a forked arm, T, from an eccentric, D on the main shaft, and communicates a greater or lesser motion to the feed, according as the pin R is adjusted nearer to or fartherfrom the shaft.

These parts represent the most approved connections for my improvements.

G is a presser-bar capable of moving vertically in its bearings, and carrying a compound arm, G, which performs important functions. A pivot-screw, G in the side of the arm G formsa center for a presser-wheel, H, the form and functions of which will presently appear. A pin, G at the extremity of the arm G serves as a movable center for the spring-lever I, which is pressed downward by a spring, I.

The presser-wheel H stands inclined. Its periphery is formed with a tread, h, and a flange, h. The tread It bears on the edge of the upper fabric, or that already sewed. The flange h performs two functions. It presses on the straw-braid which is just being applied under the other braid previously sewed, and thus serves as a presser. That is one function. It serves also as a stop or guide, against which the edge of the upper piece of braid rests 011 being pressed laterally in the act of feeding. It thus serves as a guide. That is another function.

V is an inclined arm extending forward from the arm G and touching the edge of the work just in advance of its being carried under the presser-wheel H. It aids to press down on the under braid a little; but its chief duty is to serve as an advance guide, to prevent the work from being carried too far in or back under the presser-wheel. It holds the edge rigidly outward to the proper line, so that even an unskillful operator cannot hold the work inclined so as to force it backward under the flange of the presser-wheel. Being mounted on the arm G,it is raised and lowered with the resser-wheel, and requires no attendance or thought. i

.The lever I presses fairly, but gently, on the upper face of the top braid. It is formed with a stop, which prevents it from sinking too low; but it has sufficient range of motion to allow it to adapt itself to the ordinary accidental variations in the thickness of the braid. Its fulcrum is the pin G which is held by the screw g, on loosening whichit can be adjusted forward and backward, and again set at will with the efiect to correspondingly set forward or backward the lever I.

Fis a spring, which urges down the presserbar G and its attachments.

. K is a sleeve surrounding the upper end of the presser-bar G, and is equipped with a handle, by which it may be partially revolved. An inclined cam-groove, K, in one side receives an arm, G, from the presser-bar, and by partially turnin the sleeve K the presserbar G and its attachments may be raised out of contact with the Work or lowered upon it,

subject to the tension of the spring F whenever required.

L is a rocking shaft lying parallel to the goose-neck A, and supported thereon at each end. so thatit is free to rock. A rigid arm, L, at the back end of said shaft L receives the proper rcciprocatin g motion from a link, J, actuated by the eccentric m on the main shaft D. Another arm, L near the front is formed with a cylindrical hole, which receives a globular piece, B, rigidly fixed on the side of the needle-bar B.- Through this train of parts the needle receives very rapid reciprocating motion.

It will be understood that the machine is provided with the proper devices for thread, tension, Ste.

Modifications may be made of the various parts. It is also obvious that attachments, as hemmers, &c., may be used at will.

I provide for swinging the presser-wheel and all the accompanying parts out of the way by forcibly turning the sleeve K farther after it has lifted the parts to their full extent.

I attach especial importance to the form and functions of the presser-wheel II It It and to the spring-presser I. YVhat I term the tread and flange ot' thepresser-wheel are so named from their analogy to the parts of a railroadcar wheel which, are so named; but the tread is narrower and the flange is much wider in proportion. The function of the flange will be readily understood. The tread h, when made in the form as narrow and undecided as I prefer and have shown, does not bear effectively, in a proper sense, upon the edge of the upper braid, but aids the spring-presser I in holding the upper braid down. It fits against and upon the extreme edge of the braid, and prevents the latter from being curled upward when the attendant, through neglect or want of skill, crowds the work inward against the wheel.

The function of the lever I will be readily understood. It corresponds to an ordinary presser-foot of a sewing-machine. Its provision for yielding independently of the presserbar and of the accompanying presser-wheel is important, especially in passing the joints and bunches which occur at intervals in ordinary straw-braid. It is not essential that it be in the precise form shown. It may be a vertical slide, if preferred in any case, so long as it is adapted to aid the presser-wheel in holding down thework, as here shown.

I claim as my invention 1. The lever I and its actuating-spring 1, arm G, and pin G in combination with the presscr-bar G, the spring F, and sleeve K, for holding and permitting the removal of the work, substantially as set forth.

2. The safety-guide V, in combination with the presser-wheel H, having the flange h, arm Gr, spring F, and presser-bar G, said guide V being arranged as shown, so as to forcibly hold the sewed braid out from the lateral plane of the flange It on the'presser-wheel H, as specified.

In testimony whereof I have hereunto set