US Patent: 527,968
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| Square
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Patentees:
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| Peter Grabler (exact or similar names) - Pittsburgh, PA |
| Joseph J. Brown (exact or similar names) - Pittsburgh, PA |
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Patent Dates:
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| Applied: |
Oct. 24, 1893 |
| Granted: |
Oct. 23, 1894 |
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Patent Pictures:
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Steve Gosselin
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Description: |
| This square uses a cam-actuated locking mechanism and secondary pivoting fence to allow the tool to hold any two arbitrary angles. Sample marked, 'Union Try Square & Bevel, Pat. Oct. 23, 94. Grabler & Aslakson, Mansfield, OH.' The locking device on the sample tool and the advertisement differ from the patent drawing s but the angle graduations are there. |
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