US830727A - Combined square, bevel, and protractor. - Google Patents

Description

PATENTEDSEPT. 11, 1906;

v E. H. LON-G. COMBINED sqmmgmvm, AND' PROTRAOTOR.

APPLICATION .I'ILED JULY 6. 1905- 1 gmwMoz ll'awl'n 111E023 cm, WASHINGTON, o. c

UNITED STATES EDWIN H. LONG, OF DERBY, CONNECTICUT.

i COMBINED SQUARE, BEVEL', AND PRoTRAcTo.h.- j-1,If

To all whom it may concern:

Be it known that I, EDWIN H. LONG, a citizen of the United States, and a resident of Derby, in the county of New Haven and State of Connecticut, have invented certain.

new and useful Improvements in a Combined Square, Bevel, and Protractor, of which the following is a specification.

This inventlon relates to a combined square, bevel, and protractor.

chinists, and mechanics in general and can readily be shifted for use in its various capacities. It is especially simple in construction and operation and can be manufactured and sold very cheap.

The tool can be adjusted to form several different kinds of squaresas, for instance, a carpenters square, a T-square, or a mitersquareand can further be used for marking out circles of different sizes.

Referring to the accompanying drawings, forming a part of this specification, similar characters of reference denote like .or corresponding parts throughout the several figures, and of which- Figure 1 shows my combined tool adjusted to form a carpenters square. Fig. 2 shows the same tool adjusted to form a T-square. Fig. 3 shows another adjustment of the tool forming a miter-square or protractor. Fig

4 shows a further adjustment of the tool to form a center head for obtaining the centers of different-size circles.

My improved tool as shown is formed of sheet metal and comprises two parts A and B, alike in construction, each in itself representing a sheet-metal square consisting of a long arm 0 and a short arm cl, with a radial enlargement e at their intersecting inner corners. These two members are hinged together by a suitable stud F and are ar-.

ranged one upon the other face to face, so that their edges register with each other when the two members of the tool are adjusted to the proper positions.

The connection F between the two members A and B is such as to allow the two parts to be adjusted one upon the other and to insure the said parts remaining in such position until changed by the operator. This may be accomplished by a special connection, if desired, or by a plain rivet, as shown.

To form a plain square for carpenters use, the two members would be turned upon the Specification of Letters'Patent.

Application filed Tuly 6,1905. Serial No. 268,492.

' form the back of the square.- My improved combined tool is designed for use by draftsmen, pattern-makers, ma-' Patented Sept; 11, 1906.

pivot; and adjusted so that the long'arm"of each member would register with the short arm of the other member, as 'shownin Fig. 1'.

To form a T-square, one of said members would be swung around one-quarter farther.

from that shown in Fig. 1, bringing the two .long arms together to form the blade, and the short arms at a right angle to said blade portion and disposed in opposite directions to The faceof the outer edges of the arms 6 I.

and d of both members A and B are la'idout into graduations g, as shown, which graduations obviously may represent inches and fractions thereof to be read and used in'the application of the tool for its various uses. The radial enlargements e at the intersection of the two arms of each member are also divided by graduations h, which represent'degrees of a circle and are readable in connection with the central marks t upon the adjoining member. Thus the arms of either member A and B can be adjusted to an angle desired with relation to the other member and the amount of said adjustment determined by reference to the said graduations of degrees. This particular adjustment or operation is used when the tool is used as a miter-square, as shown in Fig. 3, or when used as a protractor.

In using the tool as a miter-square either member, as preferred, may be used for the back andeither arm of the adjoining member used to get the angular or radial lines.

The tool can be used for centering cylindrical bodies of different sizes, as shown in Fig. 4, in which instance the central space between the two long arms 0 would be applied to cover the end of larger bodies, while the outer spaces 7c would be used for obtaining the centers of smaller cylindrical bodies, said centers obviously being obtained by striking a line from the center of the pivot bisecting the angle formed by the edges contactin with the work, said line passing throng the middle point of the arc of the enlargement subtended by the sides of said angle. The ends of the arms are further provided with holes Z, through which a pencilpoint may be inserted for the striking of circles, in which instance said arm would obviously be swung upon the pivot.

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

1.- A combined tool of the class described the same compfising two members pivoted one upon the other and adapted to swing in planes parallel to each other, each member having a long and a short arm, and adapted to be adjusted with relation to each other to form a plain square, a T-square or a mitera ra i A 2. A combined tool of the, class described, the same comprising two members pivoted one upon the other and adapted to swing in planes parallel to each other, each member having a long and a short arm and a radial enlargement on the inner corner of the arms of the two members, graduations upon both the face of the arms and the said enlargements.

3.. In a tool of the class described, thecom I a square having a long and a short arm and ner corner of said arms, a pivotal connection for the two arms adapted to permit the members to swing upon and register with each other, graduations upon each of said arms,

I and degrees of a circle indicated upon the radial enlargement of each member.

Signed at Bridgeport,.inthe county ofFa-hfield and State of Connecticut, this 5th day of July, A. D. 1905'.

EDWIN Witnesses:

C. M. NEWMAN, RUTH RAYMOND.

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