US Patent: 49,037
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Improvement in Carpenters' Rules
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Patentee:
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Benjamin G. Martin (exact or similar names) - Philadelphia, PA |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Granted: |
Jul. 25, 1865 |
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Russ Allen.
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Description: |
Utilizes an ordinary carpenter rule with a pointed swinging arm to serve as a plumb level along with an index and pointer to determine the angle of inclination providing the carpenter with a rule, level, square, and bevel at minimum cost. |
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