US146763A - Improvement in bevels and try-squares - Google Patents

Description

l. WHARDIE.

Beweis and Try-Squares. No. 146,763. -Patmgdxanf`27.v4.

p and I do hereby declare that the following is order to loosen the blade B in the handle, one

UNITED STATES PATENT OFFICE. N

JASON W. IIARDIE, OF NEW' YORK, N. Y.

IMPROVEMENT IN BEVELS AND TRY-SQUARES.

Specification forming part of Letters Patent No. 146,763, dated January 27, 1374; application `tiled May 3. 1873.

To all whom it may concern.:

Be it known that I, JAsoN W. HAEDIE, of the city, county, and State of New York, have invented an Improved Bevel and Try-Square 5 a full and exact description thereof, reference being had to the accompanying drawings making part of this specification- Figure l being a side view of the instrument with the blades in position for use; Fig. 2, a side view of the instrument with the blades closed into the handle or stock, showingthc mode of loosening and tightening the bevelblade in the handle; Fig. 3, an edge view of the instrument with tl le blades clsed intoA thc handle.

Like letters designate correspoiniling j arts in all of the figures.

The instrument consists of a handle or stock, A, a bevel-blade, B, and a try-square blade, C. The bevel-blade B is held between the two side pieces a b of the handle, at one end thereof, by means of a clamping-screw, c, which extends through one side, {(of thehaxullathrough a hole or longitudinal slot, d, in the blade, and screws into the other side, b, of the handle. The head of the screw is eountersunk in the handle, so as to be smooth and ilu sh therewith, and the other end of the screw, if it reaches through the side ot' the handle, is flush with its surface, or does not project beyond it. In

side, b, ofthe handle is arranged to swing edgewise out from the' other part of the handle, turning on the screw c as a pivot, as indicated in Fig. 2, in the proper direction to rise on the screw-thread, and therebyT free it from close contact with the blade, which is then adj usted tothe required angle or position, and then the side b is turned back into its proper position on the other part of the handle, thereby again tightening the blade in its position. A notch, f, in the edge of the part b, strikes a stop or projection, g, on the other part of the handle,

far in that direction. The slot d in the blade B allows the same to be adjusted lengthwise.

A very thin friction-plate, t', is, or may be, j

placed in the handle between the movable part b andthe blade B, to prevent rubbing and scarring the blade. Any wear between the part b and the blade, so that the shutting in of the former does not fully tighten the blade in place, is taken up by turning the screw c with a screw driver. A block or piece of metal, l, is placed between the parts ab of the handle at the outer end thereof, to keep the parts properly separated for the reception of the blade B. The try-square blade C is ,pivoted to the part a of the handle at the outer end thereof, or the end opposite to that in which the other blade, B, is pivoted. It shuts into the handle like the blade of a pocket-knife. It has a suitable stop or shoulder to hold it in exactly a ri ght-angled position to the handle when the blade is swung out for use.

The great advantage and improvement in this construction of the instrument will be found to consist in the thinness of the handle, and in its having no thumb-screw or any pro jecting part for tightening the bevel-blade in the handle, so that it can be used with as perfeet convenience as if there were no adjusting device. and expeditious, requiring no screw -drven wrench, or key for the purpose. By its folding and shutting features it is rendered very compact and portable. j

That I claim as my invention, and desire to secure by Letters Patent, is

The swinging side B of the handle A, in combination withthe bevel-blade B and tightening-screw c, substantially as and for the purpose herein specified.

JASON W. HARDIE.

Witnesses:

GEo. W. MGADAM, CHARLES DUFF.4

The adjustment is also very simple

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