US228903A

US228903A - Bevel

Info

Publication number: US228903A
Authority: US
Publication date: 1880-06-15
Anticipated expiration: 1897-06-15

Description

(No Model.)

B. A. JOHNSON.

Bevel. No. 228,903. Patented June 15,1880.

UNITED STATES PATENT OFFICE.

EDWARD A. JOHNSON, OF AN SONIA, CONNECTICUT.

BEVEL.

SPECIFICATION formingpart of Letters Patent No. 228,903, dated June 15, 1880.

Application filed Apri116, 1880. (No model.)

To all whom it may concern Be it known that 1, En. A. JoHNsoN, of Ansonia, in the county of New Haven and State of Connecticut, have invented a new Improvement in Bevels; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and

To which said drawings constitute part of this specification, and represent, in-

Figure 1, a perspective view. Fig. 2 illustrates the use of the invention.

This invention relates to the construction of I 5 a bevel specially for machinists use, but applicable to other uses.

In planing or making undercut bevels it is difficult for the workman to try his work without making special tools for each particular case-as, forinstance, supposingA to represent the planer-bed, and B the thing on which an undercut bevel, O, is to be made. This cut cannot well be gaged from the article itself, but must be from the bed on which it is placed; hence the machinist must first make a triangle one side of which will rest upon the bed and the other to fit against the surface to be cut. Then the workman may work to this gage. But a different bevel necessitates 0 the making of a new gage.

The object of this invention is the construction of a bevel to be used for this purpose, and which may be adjusted to different angles; and it consists in the construction, as herein- 3 5 after described, and particularly recited in the claims.

D represents the bevel-stock, which is provided with a vertical slit, a, within which the blade E will play in similar manner as in com- 40 mon bevels. At right angles to the slit ('0 there is a longitudinal slot, F, through the stock, and also a longitudinal slot, G, through the blade E, and through the slot F in the stock and the slot G in the blade is a setscrew, H, similar to the screws used in common bevels, by which the blade may be adjusted and set at different angles. At the lower end of the stock D is a stationary blade, L, running at right angles therefrom, and which :,0 serves as the rest for the instrument when in use, as seen in Fig. 2. The blade L runs nearly to a point, as at d, and is there provided with a slight enlargement, as shown. The end of the blade E on the same side as the blade L is beveled off to a point, as at e, and so as to rest against the stock at the end cl of the'blade L. The meeting of the two points at c and d constitutes a bearing for the blade E.

The blade E is adjusted at different angles by raising or lowering the set-screw through the slot F in the stock. Pains should be taken to hold the point of the blade E in contact with the point of the blade L, though this is not essential to the use of theinstrument; but it insures such a position of the blade E that its .point shall not strike the surface on which the blade L is to rest.

In use, the instrument is set upon the bed with the blade L resting thereon, as seen in Fig. 2. The blade E having been set to the required angle, the instrument is then used in the usual manner of using gages in this class of work.

The stock may be single-that is, without the vertical slit a, the blade E being placed upon one side and the set-screw upon the other.

Instead of the set-screw to clamp the blade, other known equivalents for clamping the blade may be used, and I therefore, by the term set-screw, wish to be understood as embodying such known devices.

I do not broadly claim a combined bevel and square, as such, I am aware, is not new.

I claim.

1. The stock D, constructed with a longitudinal slot at right angles to the blade, and with a stationary blade, L, combined with an adjustable blade slotted at right angles to its plane, with a pivot through the slot in the blade and the slot in the stock, and a device for setting said pivot, substantially as described.

2. The stock D, provided with the blade L, terminating in an enlargement, d, at the end, combined with a slotted blade, E, its point resting on said enlargement, and the set-screw H, substantially as described.

EDWARD A. JOHNSON.

Witnesses:

JOHN E. EARLE, J 0s. 0. EARLE.