US47777A - Improvement in scroll-sawing machines - Google Patents

Description

UNITED l STATES PATE1\LTMC) FFICE..AM

LYSANDER WRIGHT, OF NEWARK, NEW JERSEY, ASSIGNOR TO WRIGHT 85 SMITH, OF SAME PLACE.

Specification forming part of Letters Patent No. 47.777, dated May 16, 1865.

To all wtom t may concern.:

Be it known that l, LYSANDER WRIGHT, ot' the city of Newark, in the county oi Essex and State of New Jersey, haveinventeda new and Improved Scroll-Saw, to be operated by foot or hand power 5 and I do hereby declare that the following is a i'ull and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The nature 0f my invention consists inthe arrangement and combination ot' simple inechanical devices for the purpose of giving a rapid vibration to the saw by a slight amount of exertion of the foot or hand. This is accomplished by obtaining with the arrangement shown two motions of the saw to one vibration of' the lever and by utilizingthe momentum ofthe weight acquired from the action 0f the spring, thus combining rapid motion with economy of power.

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

Figure 1 of the annexed drawings is a side elevation ot' the machine, and Fig. 2 is a sectional view of the lever differently applied. u

In Fig. l, letter A represents a lever moving on its axis at L and operated by the feet placed on the treadles J J. B is a weight in connection with the lever A. C G are small rollers running on bearings. D is astrap, one end ot' whichis 'astenedto the lever A through the weight B and the other end attached to the hook E. G G are levers moving on centers fastened in the support H. F is the sawhooked in the hooks E and E, and strained tight-by the action of the spring I 'through the link K on the upper lever, G.

In the operation of the machine, as shown in Fig. 1, the spring I, through the connection by the link K to the lever G and sawF to hook E and by the strap D to the lever A, maintains the lever A in a perpendicular position until by the action ot' the foot on the treadie J it is thrown out ot' perpendicular from the center to the right, moving with it the strap D, which, striking the roller C, is made to draw down the hook-E', and causes the saw F to descend. Upon releasing the pressure of the foot upon the treadle J the spring I, by its action as described, raises the saw F and the lever A again to a perpendicular position, when, by the pressure ofthe foot upon the treadle J aided by the momentum of the weight B acquired from the action of the spring I, the lever A is thrown from the center to the left, moving the strapD, thus again causing the saw F to descend until the pressure of the foot upon the treadle J is released and the spring I causes the saw F to ascend, and draws the lever A again to its perpendicular position. In Fig. 2 the same effect is produced by the connecting-rod D, which, when the lever A is thrown from the perpendicular position, draws down the hook E', levers G G, and saw F. The lever A and weight B may be used in the form of a wheel or its equivalent.

Having thus described my invention, what I claim as my invention, and desire to secure by Letters Patent, is

The arrangement of lever A, segmental wheel B, pulleysG C, strapD, levers Gr G, hooks E E, and spring I, connected to lever G by link K, when operated by treadles J' and J, substantially as described, and for the purposes set forth.

LYSANDER WRIGHT.

Witnesses L. H. OLMs'rED, B. F. TAYLOR.'

Images