US232971A - Sewing-machine - Google Patents

Description

2 Sheets-Sheet 1.

G. W. HUNTER. Sewing Machine. No. 232,971. Patented Oct. 5,1880.

N. PETERS, PHDTO-LITHQGRAPHER, WASHINGTON. D. C.

v 2 Sheets-Sheet 2.

G. W. HUNTER. Sewing Machine.

, Patented Oct. 5,1880.

No. 232,97L,

UNITED STATES PATENT @rrroa.

GEORGE WV. HUNTER, OF PHILADELPHIA, PENNSYLVANIA.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 232,971, dated October 5, 1880.

Application filed March 1, 1879. I

ing-machine with my improvements applied thereto. 1 2, Fig. 1; Fig. 3, a sectional elevation, showin g the frame, except the part supporting and connected with the needle-operating mechanism; Fig 4:, a detached section; Fig. 5, a side view, and Fig. 6 a transverse section, showing a modification.

A is the base, 13 the overhanging arm, of a sewingmachine, the latter supporting a horizontal needle-driving shaft, 0, upon which a cylindrical cam, D, is arranged diagonally, as shown. The cam is fitted to a socket in the head aof an oscillating lever or arm, E, which extends downward through a slot, 1), in the bed-plate, and carries at the lower end a crossbar, 0, having spherical ends 0 6, Fig. 4, adapted to sockets in the ends of rods F and G. The rod F is connected to a pin, f, projecting from the shuttle-carrier H, which slides in a slot, 00, in a vertical rib or flange, d, under the bed-plate, and is provided with fingers i, that hold the shuttle in contact with the face-plate m. i

A stud, n, projecting from the side of the carrier opposite the pin f, extends into an inclined slot, y, in an arm, L, attached to or forming part of the bar G, which arm termimates in a fin ger, 9, that extends across the re ciprocating feed-plate I, a spring, (1, riveted to which, tends to throw it downward and maintain the teeth below the work-plate.

There is a stud, s, on the feed-plate, and the side of the finger is inclined at 2, so that as the rod moves forward the inclined face, strikin g the stud, will carry the plate in the direction of the arrow, Fig. 1, the extent of the feed being determined by the limit of the backward Fig. 2 is a cross-section on the line movement of the plate I, regulated bymoving forward and backward a slide, J, having a lug, t, bearing on the side of the spring g, which is pivoted on a pin, 9. The teeth of the feedplate are thrown upward above the workplate by the pressure of the finger 19 upon the under side of the plate I, or on the spring q, extending beneath the same, this resulting i'rom the forward movement of the rod G, which causes it to slide on the stud a, carrying its finger upward against the plate I.

It will be seen that the inclined cam D, for which an inclined crank might be substituted, not only imparts a longitudinal reciprocating movement to the end of the arm E, but it also turns or rocks the latter on its axis, so that the cross-bar c is turned successively to the positions shown in full and dotted lines, Fig. 1.

As the rod F is connected to the short arm of the crossbar c, the rocking ot' the latter varies but little the movement of said rod 5 but the opposite arm of the cross-bar attached to the rod G is of such a length that its oscillating motion, which takes place at the end of each stroke, first thrusts the rod Gr forward, so as to bring its finger h in contact with the feed-lever, and then, after the forward movement of rods and shuttle, draws the rod Gr back prior to the return of the shuttle, so as to depress the finger and carry it away from the plate I, which is therefore not operated on the return of the rod.

It will thus be seen that the lever or arm E imparts not only the reciprocating movement to the shuttle, but carries the feed-operating rod G back and forth, and also, in connection with the spring, up and down, so that all the movements of the shuttle and feed are derived from the movements of the arm E and spring,

To compensate for the wear of the bearingfaces of the cam D and head a the latter is split longitudinally and provided with ears 2; 4),

through which extends a screw, w, by means of which the divided portions may be clamped closely to the cam, as the wear of the faces may require.

To avoid the friction and nice fitting resultin g from end bearings for the head a, Iform an annular groove, is, in the cam D. and fit thereto a segment, a, which is secured by a screw, b, to the head a, so as to be easily removed and replaced when worn.

It will be apparent that the rod F may be connected directly to the end of the lever E, the cross-bar c projecting only from one side.

I do not confine myself to the precise mode described of operating the feed-plate from the rod G, as other means may be used. For instance, I may pivot a segmental cam-arm, L, to the stud n, Fig. 5, instead of using the sliding cam-arm described, connecting the rod G to the said segmental arm, so that the latter is turned up to come into contact with and lift theplate I 011 theforward movement, and tilted back out of the way prior to the backward movement.

The side of the arm has a cam or beveled face, 6, which, striking the lug s as the shuttle moves forward, carries forward the feed-plate.

I claim-- 1. The combination of the feed-plate I, provided with a projecting stud upon its under side, a shuttle-carrier arranged to move transversely to such feed-plate, and mechanism for imparting to said shuttle-carrier a longitudinally-reciprocatin g motion, of a cam-arm carried by the shuttle-carrier, and devices for elevating the said cam-arm to cause it to strike the feed-plate and stud when the shuttle-carrier is moving in one direction, and for depressing the same out of contact with the feed-plate when moving in the opposite direction, substantially as described.

2. The combination, with the shuttle-carrier, feed-plate, shaft 0, and inclined cam D, of the lever E, operated from the inclined cam, crossbar 0, rods F and G, and intermediate mechanism between said rods and the shuttle-carrier and feed-plate, substantially as described.

The combination, with a shuttle-carrier provided with a stud, n, and feed-plates I, having a stud, s, of rod G, provided with an arm, L, having an inclined slot, '1 finger p, and beveled edge 2, and mechanism for reciprocatin g the shuttle-carrier and operating the rod G, substantially as and for the purposes described.

4. The combination, with the shuttle and feed operating rods F and G, of the lever E, its cross-bar 0, having spherical ends adapted to sockets in the said rods F and G, divided at r, and provided with a set-screw, substantially as and for the purposes described.

In testimony whereofI have signed my name to this specification in the presence of two subscribing witnesses.

GEO. W. HUNTER. Witnesses:

CHARLES E. FOSTER,

COURTNEY A. 000mm.

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