US Patent: 375,688
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| Micrometer Gage
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Patentee:
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| George Whitehead (exact or similar names) - Providence, RI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 12, 1887 |
| Granted: |
Dec. 27, 1887 |
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Joel Havens
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Description: |
| This invention relates to what is known as a micrometer gage or caliper, which is a device for making fine and accurate measurements. The object of my invention is to provide a micrometer-gage, which will be especially
adapted to measure the diameters of screws that is, the diameter of the screw-shank plus the height of the screw-thread or volute. To the aforesaid purpose my invention consists, essentially, in the combination, in a micrometer-gage, of a countersunk or notched bed on the anvil with the projecting or tapering end piece on the co-operating micrometer screw.
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