US15940A

US15940A - howlett

Info

Publication number: US15940A
Authority: US
Publication date: 1856-10-21
Anticipated expiration: 1873-10-21

Description

NITED sTATEs PATENT oEEroE.

H. R.`HOWLETT, 0F NEW YORK, N. Y., ASSIGNOR T0 HIMSELF AND A. W. GOO'DELL.

FILING- AND SETTING SAWS.

Specification of Letters Patent No. 15,940, dated October 21, 1856.

To all whom 'it may concern:

Be it known that I, HORACE R. HowLETT, of the city, county, and State of New York, have invented a new and Improved Device for Filing and Setting Saws; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings,

`making a partl of this specification, in

y stock of the implement or device; this may be formed of two plates of metal secured together by screws, a space being allowed between the two plates to receive a sliding p gage B, and also a sliding guide C.

The gage B, is placed in the upper part of the stock, and is formed of a bar, a, having a vertical plate Z), on its outer end; the bar a, is allowed to slide within the stock A, and

may be secured at any desired point by a set screw, c, as shown clearly in Fig. 1.

To the upper part of the stock A, and at one end, there is a projecting piece, d, hav ing a vertical socket, e, at its outer end, in which socket a rod, f, is placed, said rod having a forked or slotted head, g, on its upper end, and a grooved friction roller, k, in its lower end. The rod, f, is allowed to turn freely in the socket, e.

C1, represents a frame which is constructed similarly to an ordinary band or scrollsaw frame; the upper rod, z', of this frame is fitted and works in the slotted head, g. The lower rod, y', bears against the under surface of the friction roller, 7L. A spiral spring, le, is fitted within the socket, e, and around the rod, f, said spring pressing the rod, f, and frame, C1 downward. In the lower part of the frame C1, a file D is fitted, in the same manner as a scroll saw is fitted in its frame.

A suflicient space is allowed between the lower parts of the two plates of the stock to receive the saw, E, shown in blue.

The .guide C is a triangular or wedgeshaped plate fitted in the stock A, and having a set screw Z, passing into it through an inclined slot, m, in one of the plates of the stock. This guide may be moved obliquely in the stock, A, and secured at any desired point by the set screw, Z. The guide rests upon the top of the teeth of the saw, and determines their depth or length. The inner side of the back plate of the stock opposite the teeth of the saw is beveled or inclined as shown clearly at, n, Fig. 3. A G, represents a horizontal lever, one end of which is pivoted to the lower part of the stock A,-a spring, o, is attached to this lever, said spring leaning against a projection, p, in the stock A. In the lever G, a saw set H, is fitted. Said set being a die or punch fitted within a hole in the lever and having a set screw, g, at its outer end, by which screw the die or punch may be moved farther in or out Vfrom the lever in order to give the required set to the saw.

The `operation will be readily seen. The saw E, is securedin a clamp or vise and the stock A is fitted upon it, the guide C being adjusted so that the file D, may cut the required depth and the proper length given the teeth. The le is pressed down between the teeth by the spring, lo, and as the rod, f, is allowed to turn freely in its socket the file may be turned obliquely either to the right or left, the gage B, determining the distance. The stock A is moved along on the saw as the teethare filed, and the teeth are set by operating the lever G, with the hand that grasps the stock, the hling and setting of the teeth being done at one operation. It will be seen, of course, that every alternate tooth is first filed and set. The saw is then turned and the intermediate teeth are filed and set. v

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

The file frame C1 attached to the stock A, in connection with the gage B,I guide C, and lever G, with saw set H attached; the whole being arranged as `shown and described, for the purpose specified.

H. R. HOWLETT.

Witnesses W. TUscH, I. F. BUCKLEY.