US Patent: 371,740
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| Center Square
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Patentee:
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| Samuel Darling (exact or similar names) - Providence, RI |
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Patent Dates:
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| Applied: |
Jul. 19, 1886 |
| Granted: |
Oct. 18, 1887 |
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Joel Havens
"Vintage Machinery" entry for Brown & Sharpe Mfg. Co
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Description: |
| Abstract:
The purpose of this invention is to make a square or instrument that will serve as a universal or center square, a try-square for testing internal and external angles, a bevel, bevel-protractor, an adjustable try-square, and depth-gage; and it consists, mainly, in making a center-square with a stock having two arms forming a suitable angle, one of the arms having two working-faces, the inner face for the center-square and the outer face for the try-square; an adjustable radial blade, and a revoluble plate or blade-carrier attached to the stock, preferably by a central pivot or shaft, at one side o1 the center of the angle formed by its two arms, the office of said plate being to hold and carry the blade, and also in special details of construction and arrangements.
Claim:
A square provided with a stock having an interior angle between two limbs, and having a revoluble and adjustable blade one edge of which is adapted to bisect the interior angle of the stock, and thus form the center-square and also upon partial edgewise revolution upon its pivot and endwise adjustment will serve to form both the interior and exterior angles of a try-square with an exterior straight edge of one of the limbs of the center-square |
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