US301853A - Administratrix op eloi - Google Patents

Description

No Modem E, BO'USCAY Dend' 2 sheets-sheet 1.

H. B. Boussu, Adnuliuistratrx.

SEWINGMAGHINE.

110. 801,858. Patented my 15, 1884.

f" 111111111 illllllmllllm (No Model.) :DcvdI 2 Sheets-Sheet 2.

H. B. Boussu, Admiuistmtrix.

SEWING MACHINE. No. 501,853'.` Patented July' 15, 1884.

N4 PETERS, PhmvLnhognpher. washington, ILC,

UNITED STATES `PIrrENT *OFFICEO HELEN E. EoUsoAY, on ERIE, PENNSYLVANIA, `ADMINIsTEATEIX E ELOI EoUsoAY, DEoEAsED.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 301,853, dated J ul-y 15, 1884.

Application led October 31, 1883. (No model.)

To aZZ whom z5 may concern:

Be it known that ELOI BoUsoAY, late of Erie, in the county of Erie and State of Pennsylvania, did invent certain new and useful Improvements in Stitch-Regulating Devices and Feed Mechanism for Sewing-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the Io art to which it pertains to make and use it, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to improvements in I 5 the devices for regulating the feed mechanism in sewing-machines, especially in that class which requires sliding devices for the adjustment of the stitch, and which have a regular four-motion underfeed, all of which will be 2o hereinafter more particularly described, and pointed out in the claims.

In the drawings accompanying and forming part of this specification, Figure 1 is a side elevation of a sewing-machine, partly in sec- 2 5 tion, showing the invention. Fig. 2 is a perspective view of the parts underneath, detached. Fig. 3 is a detached portion of the plate and standard, showing the clamping device and connections. Fig. 4 is a side view 3Q of the feed-bar, showing the manner in which it is sustained.

Like letters of reference denote like parts.

G is a screw-bolt having tted to its screw shank 'the nut H, with milled head. A portion of the shank at g is fiattened -to fit in a slot in the bed-plate A of the sewing-machine.

h is an under plate, and Z1. is a frictional spring, through which Athe shank of screw G passes, so that when the nut H is screwed 4o down the spring h bears on the plate A, and keeps the device in position by friction, and yet will admit of being moved by the hand of the operator.

Fis a link, which is attached to the screw G by a pin, P, and its other end is pivoted to the connecting-rod E by a pin, f, which rod E is operated by the shaft in the upper part of the sewing-machine. On connectingbar E is a friction-roller, e, over a studin the side 5o of rod E, which roller moves in the slot d of the arm D', which is connected to the rockershaft D, said shaft D being supported in brackets'K K, dependent from the under side of the bed-plate A.

A A are the rocker-shaft centers.A

C is the feed-elevating lever, pivoted to the bed-plate at T.

C is that part of C provided with an inclined plane, c, which is acted upon by the shuttlelever B, by the projecting arm B', on which 6o is a friction-roller, b.

L is a feed-bar, to which the feed-dog N is attached.

Under the plate A, as seen in Fig. 4, is a double bracket, A, in which is a spring, Z, 65 which acts upon the feed-bar L, and causes it to descend whenever the lever C is released by the movement of the arm B over the inclined part c of the feed-lever C.

On the end of rocker-shaft D, under the feed- 7o bar L, is the arm D2, having around its end and on each sidethereof an elastic covering,

m. Projecting from one side of the feed-bar L are two pins, Z Z-one on each side of the arm D2. Feed-bar L is provided with a slot at the end L', through which 'the pivot-pin passes, which secures it to the bracket,and on which it can slide toand fro. As the arm D2 is oscillated by the movement of the rocker-shaft D, it impinges upon one or the other of the 8o pins Z Z, and correspondingly moves feed-bar L to and fro. One end, c, of feed-lever C bears under the feed-bar L, and as the shuttle-lever B is moved to and fro its arm B passes over the inclined plane c, and consequently causes feed lever C. to vibrate in a vertical plane. When the inclined plane c is carried down, the opposite end, c', of lever C lifts the feedbar L and dog N into its position above the plate A, the arm D2 acts upon one o f the pins 9o Z and feeds the dog N forward, the movement backward of the arm B releases the inclined plane c, and the spring Z forces the bar L down, as the end c of lever C is free to drop.

The arm D2 rocks back and carries the other 95 pin'Z and bar Lback again. The adjustment of the machinery is such that all of these movements are coincidentwith the to-.and-fro motion of the shuttle 'and the needle-bar.

The mechanism of the feed-regulator is as Ico follows: The screw G being connected by the link F to the eonneetingbar E, the sliding of the screw G in the bed-plate A. adjusts the lower end of E in the slot d of the arin D, so that it can be placed very near the eenter of motion of rocker-shaft D, so as to give to it a very long are of motion, or it can be carried to the extreme end of arnl D', when the shaft D will have its shortest are of motion. As arnl D2 is moved eoineidently with arm D, it will be seen that the screw G ean be adjusted simply by sliding it in its slot at any moment during the operation of sewing without turning a screw or any other device.

In the nut H from the top is a threaded hole, gf, in which is inserted a small screw, y', the purpose oi' which is to act as a look o r setserew, to prevent the nut 1I from working loose upon the threaded shank of the bolt G, and to gage the i'rietion of the plates I1y h.

i Claim l. The oo1nbination,with the feed-bar L and rook-shaft D, provided with the arms D D, and means to operate said shaft, of the shuttle-lever D, provided with the arm B', and the lever C, having inclined end c, adapted to en gage with the arm B and spring l@ arranged substantially as described, whereby the requisite l'our motions are imparted to the said feedbar.

2. rilhe combination of feed-bar L, having the pins Z rook-sha`t D, provided with the arms D' D, connecting-rod E, link F, bolt G, frietion-plates h h, nut H, and set-screw g2, with means for producing the vertical movements of the feed bar, substantially as set forth.

HELEN B. DOUSCAAY.

Vitliesses:

LoUIs Rosnnzwm, Divin A. SAwDnY.

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