US Patent: 350,516
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| Micrometer Calipers
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Patentee:
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| William H. Wilkinson (exact or similar names) - Boston, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 21, 1886 |
| Granted: |
Oct. 12, 1886 |
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Joel Havens
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Description: |
| My invention relates to that class of micrometer-calipers in which a measuring-screw acts in opposition to an abutment or anvil; and the main object of my improvement is to produce micrometer-calipers that will register a measurement in either one of two systems or scales that the operator may desire. |
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