US133563A

US133563A - Improvement in strainers for scroll-saws

Info

Publication number: US133563A
Authority: US
Publication date: 1872-12-03
Anticipated expiration: 1889-12-03

Description

J. CHASE.

Strainer for Scroll-Saws.

N0.133,563, Patented Dec.3,1872.

Witness es. y ,Vn 1re rz Z512 UNTTED STATES PATENT EErcE.

JAMEs cHAsE, 0E EocHEsTEE, NEW YORK.

IMPROVEMENT IN STRAINERS FORYSCROLL-SAWS.

Specification forming part of Lettere Patent No. 133,563, dated December 3, 1872.

To all whom it may concer-n:

Be it known that I, J AMEs CHASE, of Rochester, in the county of Monroe. and State of New York, have invented certain Improvements in Stra-mers for Scroll-Saws, of which the following is a specification:

My invent-ion relates to that class of scrollsaw strainers in which a defleetin g cord is used; and it consists mainly in attaching each end of such deiiecting cord to a secondary or auxiliary deflecting cord, the latter bein g attached to a spring or cushioned hanger or followerplate at one or both ends of each.

The drawing represents a front elevation of my invention. Y

The higher rate oi' speed at which a scrollsaw can be run. the more rapid and perfect will it work. It is, therefore, desirable to have the least possible weight of material to move in the strainer, and to move it the least possible distance, and at the same time afford the necessary stroke to the saw. When the deiiectin g cord is attached to the end of a spring, or to a spring-lever, as heretofore used, the weight of material in either case necessary to aii'ord proper strength to such parts required much power to overcome their inertia and momentum, and the constant strain and vibration of the same, upon light saws especially, has been too great to permit them to be run as rapidly as desired. These difficulties are entirely obviated by my triple deflectingcord strainer.

A is a frame, preferably of iron, to which the hangers h are fixed. The hangers h are pivoted to the lower points, as shown, and their arms a rest upon the points of the set-screws s, which are tapped through lugs e east upon the frame A. The hanger-stocks or followerplates b are hinged to the hangers h, and the stocks b' to the hangers h'. A plug, g, of rubber or other suitable material, is inserted in the concave space between the two. The followerplates are each provided with a bifurcated lug, d, between the lips of which the auxiliary dei fleeting cords C are secured by means of the knots z' at each end. The primary deiiecting cord D is secured to the others by tying or otherwise. The saw-strap is attached at the point indicated by the dotted line .r.

The hangers and follower-plates may be made straight, and a square or iiat plate of rubber or other spring used; or cushions ot' felt or woolen cloth may be employed.

Steel wires might be substituted for the i cords, if desired.

I do not claim anything separately that is shown in the patent to S. G. Mason, May 16, 1871; but- What I claim as 'my invention is The main detlecting cord D, in combination with the auxiliary defiecting cords G, having their ends connected tothe cushioned followerplates b, one or more of which latter is made adjustable to regulate the tension, and the parts being arranged to act conjointly in the manner and for the purposes shown and described.

J. CHASE.

Witnesses:

PATRICK MoINTY-EE, W. S. LOUGHBOEOUGE.