US151978A - Improvement in plaiting attachments for sewing-machines - Google Patents

Description

W. HILDEBRAND.'

Plaiting Attac hments for Sewing-Machines.

UNITED STATES PATENT FFIC.

TVILLIAM HILDEBRAND, OF FORT 'VVAYNE, INDIANA.

Specification forming part of Letters Patent No. 15 1,978, dated June 16, 1874 application filed September 8, 1873.

To all whom it may concern:

Be it known that I, WILLIAM HILDE- BRAND, of Fort TVayne, in the county of Allen and State of Indiana, have invented certain new and useful Improvements in Plaiting Attachments for Sewing-Machines; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, in which like letters refer to like parts in the different figures.

To enable others skilled in the arts to make and use my invention, I will proceed to describe its construction and operation.

In the drawings, Figure 1 is a side elevation. Fig. 2 is a detached view. Fig. 3 is a detached view.

The nature of my invention consists in the arrangements and combination of certain devices forming a sewing-machine attachment,

to be used for the purpose of plaiting cloth.

In the drawings, A represents a reciprocating bar, which slides in suitable guides a formed on and supported by clamp B. Said bar is, on its upper edge, provided with teeth, into which pawls O C alternately take. Said pawls are formed on the ends of parallel bars 1) D, slotted as seen at b I), and through said slots pins 0 0 pass, so as to form guides upon which said bars may freely reciprocate. On the inner ends of said bars are formed recesses d (1, through which a wrist-pin, f, on crankarm g passes.v Said bars D D are provided with sliding stops E E, which are secured by means of set-screws in any desired position. These stops, when set forward, contract the width of recesses (Z d, as may be required for difl erent kinds of work. One recess may be entirely closed, so as to form a simple slot, in which the wrist-pin may work, while the recess in the other bar may be opened so wide that the wrist-pin will not in its vibration touch either side of the recess.

In practice it is necessary to increase or decrease the width of the plaits, also their fulness. By the combined action of these stops with the recesses any desired size of plait may be obtained. h h represent springs, which serve to press the pawls to the bar A, and keep them constantly in contact. F represents an adjustable stop, which is secured to the end of bar A. G represents a sliding bar,

which is secured by means of a set-screw to the other end of the bar A, and serves to graduate the width of the plaits. H represents an oscillating bar, which is pivoted as seen at i. This bar extends. horizontally beyond the movement of the pawls; its ends are so formed that, when they come in contact with stops F and G, the said bar is oscillated, substantially as described, in a pending application by Fredrick Sievers and myself. The stops there described are similar, except that in this case stop F is made adjustable, so as to reverse the movement of the bar A before it arrives at a point where the needle will socure the plait, thus enablingthe operator by this adjustment to leave spaces of any desired width between a series of plaits. This is a matter of considerable importance in practice. I represents a foot-piece or cloth -presser, which is provided with an elliptic spring, 0, which is secured to the toe of said foot-piece, and extends back under it, as seen in the drawings, for the purpose of aiding in folding and securing the plait while being stitched. Foot-piece I is recessed on its under side, as seen in the drawings at o, for the purpose of giving room for the end of the plait-holder. K represents an elastic bar, which extends from the foot-piece backward to where it is secured to the frame B. Directly over this bar, and sliding on it, is the plait-ibrining blade or folder L, which is subs antially like that described in the case above referred to. An elliptic spring, J, is secured in a position so that it impinges on the under surface of bar A, and serves to prevent it from moving too easily. I

What I claim as new, and desire to secure by Letters Patent, is

1. Reciprocating bars D D, slotted and recessed as seen at b b d d, pins 0 c, pawls (J O, wrist-pin f, and crank-arm g, all being constructed and operating in the manner and for the purpose specified.

2. The adjustable stop E, constructed and operating as and for the purpose specified.

3. The adjustable stops E E, arranged, constructed, and operating as and for the purpose specified.

TV. HILDEBRAND.

Attest:

H. F.W1LLsoN, J. T. LosEE.

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