US327283A - Adjustable pitch-board for squares - Google Patents

Description

(No Model.)

H. LEVY.

ADJUSTABLE PITGH BOARD FOR SQUARES. No. 327,283. Patented Sept. 29, 1885.

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UNITED STATES PATENT OEEIcE.

HENRY LEVY, OF CLINTON, MISSOURI.

ADJUSTABLE FlTCH-BOARD FOR SQUARES.

SPECIFICATION forming part of Letters Patent No. 327,283, dated September 29, 1885.

(No model.)

To aZZ whom, it may concern:

Be it known that I, HENRY LEVY, a citizen of the United States, residing at Clinton, in the county of Henry and State of Missouri, have invented a new and useful Improvement in Squares, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to an ilnprovement in squares; and it consists in the peculiar construction and combination of devices that will be more fully set forth hereinafter, and particularly pointed out vin the claim.

In the accompanying drawings, Figure 1 is a perspective View of a square embodying my invention when adapted for use for work on stairs, &c. Fig. 2is aplan view of the square, taken from the opposite side thereof, the square being adapted for use in marking rafters, braces, special miters, or getting angles and bevels on any desired degree. Fig. 3 is a plan view of the same, showing the implement adapted for use as a try or T square.

A represents a square, which may be of any size desired. The long arm a of this square is slotted throughout nearly its entire length, as at a', and the short arm b of which has a slot, b. Near the outer end of the arm b, ina line with the slot b', is an opening, b2. One face of the square has a scale, a2, on its long arm and a similar scale, b3, on its short arm. ,On the opposite face of the square, on the'inner side ofthe long arm, is a scale of deg-rees, a, numbered and marked from 5 to 50, and drawn on aradius of which the center of the opening b2 forms the center. On the opposite side of the long arm is a scale, at, drawn from the center of the opening b2, and indicating pitches from t to E represents a ruler formed of two plates, e, connected at one end by an intermediate block, c. Slots e2 e are cut in each of these plates iu a line with each other, and extending from about the center of the ruler to near the ends thereof. The square is placed in the space between the plates e of the ruler, and is secured thereto by a setscrew, F, which passes through the slots e2, and either through the slot b or the opening I)2 of the short arm,

and by a set screw, G, which passes through the slots e3 and the slot a. The screwF has a head, f, and a thumb-nut, f, and the screw G has a head, g, anda thumb-nut, g.

In Fig. l the screw F is shown in the slot b of the short arm, and the instrument is adapted for use iu getting any odd pitch-as for a roof, or in stair-buildingwboth ends of the ruler being free to work in the slots of the arms of the square, and can be secured at any desired adjustment by tightening the thumbscrews, and thereby clamping the ruler and 'square together.

In Fig. 2 the screw F is shown in the opening b2 of the short arm. This screw, when thus placed, forms the pivotal point for the ruler, the outer end of which can be moved so as to set the ruler at any desired angle indicated on the scale c3, or at any desired pitch indicated on the scale ai.

On the inner side of the long arm, on the face opposite to that on which the scales c3 and a4 are inscribed, is a scale, a5, drawn from the center of the opening b2, and marked and numbered from 4 to 12. This scale is to be used for marking regular iigures from a square to a gure having twelve sides.

By moving the free end of the ruler to a line with the short arm, said ruler is adapted to form a head, and the instrument becomes a try-square, as shown at Fig. 3 in solid lines. By moving the ruler endwise until the screw G is in the inner end of the slots e the ruler forms the head of a T-square, into which the instrument is converted, as shown in dotted lines iii Fig. 3.

An instrument thus constructed is adapted for use for a great variety of purposes, and will be found of great practical utility by carpenters, stair builders, draftsmen, and others, enabling accurate work to be done with ease and rapidity.

Having thus described my invention, I claimrlhe combination of the square having the slot a in its long arm, the slot b in its short arm, the opening b2 at the outer end of the short arm, the square having measuring-scales a and b3 on one face, and the scale r1.5 drawn from the center of the opening b2, and on its In testimony that I claim the foregoing as opposite face the scale of degrees as on its nmy own I have hereto :nfxed my signature in :o ner side, and the pitch-scale aL on its outer presence of two Witnesses. side on opposite sides of the slot a', said scales 5 a3 and a* being drawn from the center of the HENRY LEVY' opening b2, Wththe ruler having the slots, and Witnesses: the set-screws for securing the ruler to the CLINTON GLENNY, square, substantially as described. l S. E. CHEEK.

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