US527968A

US527968A - Square

Info

Publication number: US527968A
Authority: US
Publication date: 1894-10-23
Anticipated expiration: 1911-10-23

Description

(No Model.)

P. GRABLER 8v' J. J. BROWN.

'SQUARE Patented 00h23, 1894.

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UNITE STATES i PATENT OFFICE.

SQUARE.

SPECIFICATION forming part of Letters j Application led October Z4, 189

To all whom it may concern.-

Be it known that we, PETER GRABLER and JOSEPH J. BROWN, citizens of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Try-Squares, of which the following is a specification, reference being had to the accompanying drawings.`

This invention has relation to certain new and useful improvements in try squares and more particularly to a combination tool comprising both square and bevel.

This invention has for its object the provision of novel means whereby a try square may be adjusted to any angle or degree without changing the angle of the square proper or obstructing thelsame.

Furthermore, the invention contemplates a novel construction that will aiford two separato and independent adjustments, each capable of being placed at different angles; a further object being to provide a locking device that will firmly retain the tool when set at the desiredangle.

This invention has for its still further object, the construction of ya tool that willbe simple, strong, durable and comparatively inexpensive to manufacture.

Vith the above objects in view, the invention consists in the peculiar construction,`

combination and arrangement of parts to be hereinafter more particularly described and specifically pointed out in the claims.

In describing the invention in detail, reference is had to the accompanying drawings forming a part of this specification and wherev in like figures of reference indicate similar parts throughout the several views, in which- Figure l, is a plan view of our improved try-square, showing the upper and lower arms` at different angles of adjustment. Fig. 2. is a similar view with the adjustable arms closed. Fig. 3. is an end view. Fig. Ltis a detail view of the locking device arranged in thestock of the try-square.

In the drawings the` numeral l, indicates the blade of the square; 2, the stock of the same; 3, the arc scales; 4, 4, the adjustable arms, pivoted or hinged at their

inner faces lugs

6, 6, to which are pivot- 5 and carrying at Patent No. 527,968, dated October 23,1894. s. sesam. 489.017. mman.)

ally secured at 7, 7,

segmental guides

8, 8, operating in formed in the stock on opposite sides of the blade.

At the upper end of the stock near the center, a recess Il is formed in the shape `of a segment. In said recess a small thumb lever 12, is placed. At the end and integral with this lever is a pin 13, carrying a cam 14. Against the segmental guide 8, at the top edge near the end of I5, is provided.

The arc scale 3,is concentric to the pivot 5, and the arms may be set at any angle be` tween O and 90.

Operation z-We will assu m e the square and its adjustments are in their normal position and it is desired to obtain two different angles or degrees; for example, l and seventy degrees. The thumb lever is then slightly moved to one side, thus releasing the cam from the guide. Then the arm forming the bevel may be adjusted to the desired `point and the cam tightened by means of the thumb lever. The operation may then be repeated on the opposite side of the blade, and the square will be ready for use.

It will be particularly noted that the peculiar construction of the segmental guide, pivoted to the center of the arms, adds both strength and durability to the device.

We are aware that adjustable squares or bevel square-s have been heretofore used, but they are not capable of being adj usted at two different angles, besides retaining and not interfering with the try-square proper.

Still further advantages of the device will be apparent from the foregoing description.

The tool is particularly designed vand adapted to be used by carpenters, yet it may be employed and used with great advantage in connection with other instruments.

` Having fully described our invention, what we claim as new, and desire to secure by Letters Patent, is f 1. A try square provided with independently adjustable arms to indicate two different angles without disturbing the square proper substantially as described.

2. A try square and bevel comprising a blade and stock set at right angles, and having secured to its stock independently adthe stock a finger recess forty-tive degrees justable arms on opposite sides of the blade; and means for adjusting the same to different angles or degrees without interfering with the square proper, substantially as described.

3. A try square comprising a blade and stock set at right angles, and having secured t0 its stock independently adjustable arms on opposite sides of the blade, and means for locking said arms at the desired degree or angles substantially as described.

4. A combined try-square and double bevel, comprising a blade and stock, independently y opposite sides of the square at the intersection of blade and stock, said arms carrying segmental arms or guides adapted to operate in slots, cams and H. C. EVERT, H. E. SEIBERT.