US276056A - Eichaed w - Google Patents

Description

(No Model.)

R. W. LUNDY.

SEWING MACHINE.

Patented Apr. 17, 1883.

NITED STATES PATENT Trice.

SEWING-MACHINE.

- SPECIFICATION forming part of Letters Patent No. 276,056, dated April 17, 1883,

Application filed November 9, 1882. (No model.)

To all whom it may concern Be it known that I, RICHARD W. LUNDY, of New York city, New York, have invented certain new and useful Improvements in Sewing-Machines, described in this specification and illustrated by the drawings thereof.

Figure 1 is a side view of one form of one of the improvements. Fig. 2 is a top view thereof. Fig. 3 is a top view of one form of the other improvement, showing the details thereof. Fig. 4. is a front view of the improvements applied to a portion of a sewing-machine.

The invention consists in improvements relating to the forks of the vertical and horizontal shuttle-levers, whereby friction is reduced and the bearings are made adjustable to the face of the eccentric on the driving-shaft, and the ball bearing on the lower end of the vertical lever.

In the form of construction shown one prong, A, of the fork B has a straight bearing, 0, with a convex back, a, fitting into the concave face I) of the prong. The other prong, D, of the fork has a wedge-bearing, E,with a convex back, 07, fitting into the concave face fof the prong. The bearings are held by setscrews 9 h to the prongs, the holes at n for the set-screws being larger than the set-screws, to allow the set-screws to be moved vertically or laterally in adjusting the bearings. The eccentric G on the driving-shaft H operates between the hearings to give a vibrating motion to the vertical lever. The faces of the bearin gs and the eccentric are properly adjusted by slacking the set-screws, moving the hearings to the proper position, and tightening the setscrews again. Wear is compensated for by adjusting the wedge-bearing to the face of the eccentric. One prong, K, of the fork of the horizontal leverL serves as one bearin g for the ball M on the end of the vertical lever. The other prong, N, is provided with a wedge, s, and a bearing-plate,r, for the ball. The wedge is held in place and adjustable longitudinally by slots t and set-screws t, and the bearingplate is held by the same set-screws, the prongs being suitably perforated for the purpose. The wedge and plate are flat on their surfaces, are readily adjusted to compensate for wear, and to insure aquiet, easy movement, and are easily replaced, when worn, without injury to the prongs of the fork.

The details of construction may be varied Within the scope of the improvements. For example, the concave backs and seats may be reversed, the prongs being made with convex backs and the bearings being made with concave seats.

I claim as my invention- 1. The combination, in sewing mechanism, of fork B, having prongs A D, with concave seats b d, bearing-plate O, with convex back a, bearing-wedge E, with convex back f, adjustable set-screws g h, eccentric G, and shaft H, substantially as set forth.

2. The combination, in sewing mechanism,

of lever L, having prongs K N, adjustable wedge s, bearing-plate r, and set-screws t on prongs N, and lever-ball M, substantially as set forth.

3. The combination, in sewing mechanism, with the prongs of the fork of a lever, of a bearing-plate having a convex back, a bearingwedge havinga convex back, and an eccentric, the bearing-plate and the bearing-wedge being supported in concave'seats in the prongs and adjustable by set-screws to the face of the eccentrics, substantially as set forth.

4. The combination, in sewing mechanism, with the prongs of the fork of a lever, of a plate-bearing adjustable by a wedge and setscrews to the point of contact with the rounded end of a connecting-lever, substantially as set forth.

In witness whereof I hereunto set my hand and seal, in presence of two witnesses, in the city, county, and State of New York, this 17th day of October, 1882.

RICHARD W. LUNDY.

Witnesses:

CARRIE BING, CHARLES M. FAIRBANKS.

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