US Patent: 171,927
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| Improvement in Beam Squares
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Patentees:
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| Charles Farnham (exact or similar names) - Penobscot, ME |
| Joseph D. Leach (exact or similar names) - Penobscot, ME |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 15, 1875 |
| Granted: |
Jan. 11, 1876 |
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Russ Allen.
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Description: |
| Beam square that allows mortice and tounges to be accurately marked. One blade is fixed and the second blade is adjustable with a scale on the face. Openings on the blades with graduated markings allow parallel marks to be make to complete the layout. |
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