US37502A - Improvement in sewing-machines - Google Patents

Description

2 S.heets-Sheet I.

W. 0. GROVER.

Sewing Machine.

No. 37,502. Patented Jan. '27, 1863.

Q 2 Sheets-Sheet 2.

W. 0. GROVER;

Sewing Machine.

Patented Jan. 27, 1863.

UNITED STATES PATENT OFFICE.

W. O. GROVER, OF BOSTON, MASSACHUSETTS.

IMPROVEMENTQIN SEWING-MACHINES.

Specification forming part of Letters Patent No. 37,502, dated January 27, 186.3.

To all whom it may concern:

Be it known that I, W. O. GROVER, of the city of Boston, in the State of Massachusetts, have invented a certain new and useful Irnprovementin sewing-ll/lachines; and Idohereby declare that the following specification, taken in connection with the drawings, is a full, clear, and exact description thereof.

In the drawings, Figure 1 is a front eleva tiorr of my improvement, and Fig. 2 a side elevation of the same.

This improvement is in certain points of arrangement and nrecharrical construction, rendering the machine cheaper and less liable to derangement, and is shown in the drawings as applied to a new pattern of what is cornrnonly known as the Grover 8: Baker machine, although it is applicable to other machines for sewing seams; and the nature of my invention consists in arranging the horizontal main shalt which actuates the feed directly or nearly under the feed, when such shat't also actuates an arm thatgives motion directly to a needle-carrier, substantially as hereinafter specified, the. object being to use butone shalt in the machine, and to have no joints or corrnections except those absolutely necessary in converting one kind of motion into another.

In the drawings the main shaft of the ma chine is shown at a. it is provided with a driving-pulley, b, and has keyed upon it, or otherwise'attached, acanr, c, with two faces, as shown in the drawings, one of which gives to the lower roughened teed-jaw, d,a rnotron back and forth in the length of the stitch, and the other moves the samejaw up and down to and from the spring clarnpjawf. This same cam has on its face a crank p1n, which takesinto a slot, h, in a bell-crank, 'i, pivoted at I, having its upper arm prolonged and bent downward, so as to serve as a carrier for a needle, m. This same arm has an acting surface, as at 0, which lies in contact with a shaft, 19,, shaped, as shown in the drawings, insuch manner that the acting surface, by reciprocating in contact with it, shallcause such shaft topause and turn,

as may be required. thus imparting the necessary motion to a curved needle, as at q.

, Inspection of the drawings will show that the prolongation of the driving-arm of the upperneedle until it comes under or nearly urider that needle, in combination with a main shaft arranged under the feed, or nearly so, on ables me to drive the feed and the piercing-needlefrorn thesarneshattwithouttheintervention of racks, links, or connecting-rods, simplifying the machine in srrch manner that but one shaft and one double cam and a crank-pin, or its equivalent, form the main essentials of the apparatus, thus materially cheapening the con;- struction and lessening the chances of derangemerit.

I am aware of the fact that amachine known as the Whecler8t Wrlsorr machine has been contrived and is in extensive use, in which the main driving-shaft actuates the feed, and also bymeansofaneccentric, arod, andajoint gives motion to the needle-arm; but this contrivance employs the very joints I wish to avoid, and

in such machines the needlecarrier is notpro-' longed underneath the material to be sewed.

The precise kind of connection betweerrthe lower end of the long bent arm and the shaft is not material, as that connection may be variously altered and modified without departing from the principle of my invention, and

1 still secure all the good effects of my combined arrangement.

Having thus described my improverrrent, I claim as of my own invention-' A long bent vibrating arm, one of whose ends drives a needle, in combination with a horizontal shaft arranged under the l'eed, and actuating the feed when that same shat't is also connected directly to one end of such, bent arm, extending under the spot where the needle pert'orates the cloth, or nearly so, the whole arranged, connected, and acting substantially in the manner and for the purposes hereinbefore set forth.

In testimony whereof I have hereunto subscribed my name in the city ot' Boston on this 30th day of September, A. D. 1857.

' i WM. 0. GROVER.

In presence of- Win. E. BAKER, R. G. BROWN.

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