US768324A - Miter-square. - Google Patents

Description

No; 768,324. y PATBNTBD AUG.23,1904,

R.`A. BREUL. MITER SQUARE.' APPLICATION FILED DEO. Z9, 1903. N0 MODEL.

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ffy E UNTTED STATES Patented August 23, 1904i PATENT UEEECE- lvl-ITER-SQUARE.

SPECIFICATION forming part of lLetters Patent No. 768,324, dated August 23, 1904.

i Application led December 29, 1903. Serial No.18'7,04=. (No model.)

To @ZZ whom, t may concern: f

Be it known thatI, RICHARD ALVIN BREUL, a citizen of the `United States, and a resident of Bridgeport, in thecounty of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Miter'- Squares, of which the following isa specification. f

This invention relates to new and useful improvements in miter-squares such as shown in patent to Fox-No. 831,047, and is likewise equally as well adapted to try-squares and various forms of other squares and bench-tools.

It is the object of the invention to improve upon squares of the above classes by materially stiffening the back, and especially the face of the back, where injury is most liable and likewise most objectionable, at the same timeto lighten and improve the appearance of the back.

The FoX square referred to is shown formed of two parts, the back of 'which is unneces- .Saiily heavy,.beside's having sharp prominent corners, which readily become bruised by rough usage. There are also other forms of squares wherein the backs are made of sheet metal, one edge being turned out at right angles to form a face. Practically these tools are not stiff enough toprevent the face of the back from being' dented or bent by use, thus rendering them also unreliable.

With the above features in mind my invention resides and 'consists in the novel construetion and combination of parts shown upon the accompanying sheet of drawings, forming a part of this specification, upon which similar characters of reference denote like or corresponding parts throughout the several figures, and .of which- Figure l shows a perspective view of my improved miter-squa're complete. Fig. 2 is a rear edge view of the same. Fig. Sis a de- 'tailed' perspective view of the beam member of the back. Fig. 4l is a central vertical crosssection taken on lines 4 4: through the back of the squareshowing the constructionl of the same. Fig.-5 shows a side elevation of a trysquare embodying my improvement, and Fig. 6 shows a cross-section of a slightly-modified form of back.

My improvement is practically made of three parts, each being formed of vsheet metal stamped out and bent to conform to the respective shapes required, then assembled and secured together, producing a square of the greatest possible strength where required and consistent with a given weight of material.

Referring in detail to the characters of reference marked upon the drawings, A repre-v sents the blade of the square, which comprises avertical angular member B and (l, respectively, the latter being arranged at an angle of forty-iive degrees to the vertical member, while the vertical lmember is arranged at a right angle to the back or beam. Both of these members of this blade may be provided with suitable graduations, if desired, and laid out in any given number of equal parts.

The back referred to consists of two pieces of sheet metal D and E. The former is preferably bent up into a U-shape beam with its upper edges turned out at right angles form# ingflanges F. Thel bottom of this beam is cut away at one end, as at K, to receive the grees are desired they are struck along either edge of thev member C.

E represents a face-plate which lays across the top of the flanges F A of the beam 'and secured thereto by having its outer edges ITI turn snugly in under said iianges. The central portion of each end of this face-plate is cut away, as are I and J, to receive the inner edges of the members B and C, thus extending the face of the back along the sides of' said members of the square in a way to insure ample engagementof the back with Work. e

The specially-constructed bac-k in question obviously comprises the features of my square and has the advantages of being light, neat in appearanceand exceptionally strong, being formed of three thicknesses of sheet-steel, and

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thus affords ample resistance to such rough usage as it is liable to get.

In Fig. 5 of the drawings I have shown a try-square the back or' which is constructed in substantially the same manner as that referred to in the miter-square, which ligure shows that my invention is equally applicable to try-squares and, in fact, can also be employed upon other forms of bench-tools.

It is further apparent that should it be desired to form a back for either the miter or try-square with a face on both its inner and outer edge the same could be accomplished in substantially the same way by employing two channel-beams D' to take the place of the U- shape beam before mentioned and in which instance two face-plates E would be used to cover the upper and lower faces of the flanges F' of the beam, thus producing a construction which is in all essentials practically like that of the above-described construction and likewise justly comes within the scope of my in- .Vention Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s4

l. In a square of the class described, the combination with a blade, of a back formed of sheet metal, and comprising a beam bearing longitudinal and outwardly-disposed langes, and a face-plate covering and attached to the flanges of said beam.

2. In a square of the class described, the combination with a blade member, olE a. back attached thereto comprising' a beam bearing ilanges disposed outwardly in opposite directions along its upper edge, and a face-plate covering the face of said flanges and havingits edges turned over and bent under the edges ol said flanges.

In a square of the class described, the combination with a blade member, of a back comprising a U-shaped beam having its upper edges turned outward in opposite directions at substantially right angles and a face-plate secured to the top face of said lian ges in a way to secure the same to the edges of said liangcs.

4. In a square of the class described, the combination with a blade member, of a back comprising one or more beams, the edges oi which are disposed outward at substantially right angles, and parallel with each other, and plate covering such edges of such ianges in a way to protect and reinforce the same substantially as described.

Signed at Bridgeport, in the county oi Fai r- {ield and State of Connecticut, this 21st day of December, A. D. 1903.

RICHARD ALVIN BREUL.

INfitnesses:

C. M. NEWMAN, IV. V. DEvITT.

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