US Patent: 382,348
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Beam-Calipers
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Patentee:
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Charles E. Billings (exact or similar names) - Hartford, CT |
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Patent Dates:
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Applied: |
Mar. 06, 1888 |
Granted: |
May 08, 1888 |
Patent Pictures:
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Ralph Brendler "Vintage Machinery" entry for Billings & Spencer Co.
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Description: |
This patent covers a novel method of constructing a set of outside calipers, wherein the main beam is made by holding a slotted plate between two slotted bars. This not only protects the graduations from wear, but simplifies the construction.
This tool also provides a micro-adjust feature which is actuated by a spring. This same adjustment was used on a line of marking gauges produced but the same company.
Known examples of the tool are marked with the manufacturer and inventors name, as well as the patent date. |
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