US Patent: 290,807
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| Scratch Gage
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Patentee:
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| John E. Sherman (exact or similar names) - North Attleborough, MA |
| USPTO Classifications: |
| 33/42 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Nov. 14, 1883 |
| Granted: |
Dec. 25, 1883 |
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Ralph Brendler
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Description: |
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A machinist-style scratch gage, which uses a jam-nut for holding
the arm. This is a great idea, and would hold firmly and be easy
to adjust.
I have come across several apparantly manufactured pieces which
use this locking mechanism, but none have been marked with the
patent date. Since this is a fairly obvious idea, I hesitate to
say that these pieces are based on this patent.
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