US1507798A - Try-square - Google Patents

Description

Patented Sept. 9, 1924.

UNITED" STATES EMIEL PfSEGHE-RS, OE CHICAGO; ILLINOIS.

' i I rmnsaoenn.

Application filed April 26, 1922. Serial No. 556,723.

ToaZZ whom it may concern:

Be it known that I, EMIEL P. Snonnns, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Try-Squares, of which the following is'a specification.

This invention relates to an adjustable try-square and has for its object the provision of a tool of the class named which shall be of improved construction, convenient and efiicient in operation, and economical to manufacture.

The invention is exemplified in the combination and arrangement of parts shown in the accompanying drawing and described in the following specification, and it is more particularly pointed out in the appended claims. a

In the drawing- Fig. 1 is an elevation of one embodiment of the present invention;

Fig. 2 is a section on line 22 of Fig. 1;

Fig. 3 is a fragmentary view similar to Fig. 1 showing the try-square blade arranged at an oblique angle;

Fig. 4 shows the blade and dial of the square removed from the entire block; and

Fig. 5 is a section on line 55 ofFig. 4.

In the embodiment of the invention shown in the drawing, the numeral 10 designates a block of wood or other suitable material having a slot 11 formed therein for receiving the try-square blade 12. A bolt 13 projects through an opening near the end of the block 10 and is provided with a wing nut 1 1 for tightening the bifurcatedportion of the block 10 upon the blade 12. The bolt 13 extends through a slot 15 in the'blade 12, the width of the slot being equal to the diameter of the bolt. It will be apparent that the blade 12 may he slid to various positions transversely of the block 10 and that it may be swung about-the bolt 13 as a pivot to any angular position desired.

In order to indicate the angle at which the blade is positioned a circular dial 16 is provided having graduations 17 arranged upon its face, the numerals 18 being positioned on the dial outside of the graduations. A pair of stops 19 are struck outwardly from the dial 16 and register with the slot 15 in the blade 12. The stops 19 are of the same width as the slot so that the blade may be slid along the stops as guides, but any rotary movement of the blade about the bolt 13 will cause the dial 16 to rotate in unison therewith.

The end of the block 10 is provided with a notch 20 through which the graduations on the dial 16 may be read to-indicate the angular position of the dial and blade. An

opening 21 13 and fits snugly upon thebolt. cases itmay be desirable to attach a, sheet metal plate 22 to the end of the block 10 having a slot 23 therein registering with the slot 20 to facilitate accurate readingof the dial. The plate 22 may be inserted in a groove formed in the end of the block 10 in which it is tightly held by friction but along f in the dial accommodates the bolt In somewhich it may he slid by the exertion of sufficient force to accurately adjust the posit on of the slot. Other suit-able forms of indicators may be used for designating readings on the dial without departing from the spirit and scope ofthe invention.

The head 24 of the bolt 13 may be countersunk in the rear of the block '10 to form-a smooth surface, and in some cases it may be desirable to notch the end oft-he bolt 13 by means of a chisel, as shown at 25, or

otherwise obstruct the threads at the end of,

the bolt to prevent loss of the wing nut 14:.

I claim i i y 1. A try-squarecomprising a supporting block, a bladepivotally mounted adjacent one end of said block, and a circular dial mounted on the .pivot of said blade and extending beyond the end. of said block and arranged to cooperate with said blade to indicate the angular position thereof, said dial having graduations thereon and numerals for designating the different graduationson said dial, said numerals being positioned on said dial outside of the graduations thereon and on the portion of the dial extending beyond. the end of said block.

2. Atry-square comprising a support having a blade pivotally mounted therein adjacent one end thereof, a rotary dial mounted on said support to rotate about the pivot 'of said blade for indicating the angular position of said blade, graduations formed on'the lateral face of said dial, said support having a slot therein extending inwardly from the end thereof to permit said graduations to be seen therethrough, and numerals for designating various graduations on said dial, said numerals being positioned on a portion of the lateral face of said dial outside of said graduations and beyond the end of said support so that said numerals Will not be obscured by the slotted portion of said support.

3. A try-square comprising a supporting block having resiliently spaced bifurcations, a blade arranged between said bifurcations and having a longitudinal slot therein, a circular dial positioned adjacent one face of said blade and having a portion thereof extending beyond the end of said block, a pivot bolt e:-;ten ;ling through the bifurcations of said supporting block and through said dial and the slot in said blade, a nut on said bolt for clamping said bifurcations against said blade and dial to retain said blade in fixed position relative to said block projections extending from the face of said dial and registering with said slot to cause said dial to rotate about said pivot in unison With said blade While permitting longitudinal movement of said blade, graduations on the lateral face of said dial for indicating the angular position of said blade, an index on said block at the end thereof beyond the pivot for said blade for cooperating With said graduations and numerals on the lateral face of said dial outside of the gradua-ti'ons thereon.

In a try-square, a movable dial having graduations thereon, a pivotal support for said dial, and an indicator on said support for cooperating With said dial, said indicator being adjustable on said support for accurately positioning the same for correct reading in conjunction With said dial.

5. A try-square comprising a supporting block, a blade pivotally mounted on said block, a dial carried bysaid block for pivotal movement in unison With said blade, and a plate having a slot therein for indicating the readings on said dial, said late being adjustably mounted on said bloc to permit movement thereof for accurately positioning the same relative to said block and dial.

6. A try-square comprising a bifurcated block a blade positioned between the bifurcations of said block and having a longitudinal slot therein a dial slidably engaging said slot but held against rotation relative to said blade, a pivot extending through said dial and slot and mounted adjacent the bifurcated end of said block, one bifurcation of said block having a slot in the end thereof, and a plate mounted in said slot and having an index thereon for cooperation with said dial, said plate being slidable in said slot for adjusting the position of said index and frictionally held in its adjusted positions. s In testimony whereof I have signed my name to this specification on this 21st day of April, A. D. 1922.

EMIEL P. SEGHERS.

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