US Patent: 454,516
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| Micrometer Gage
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Patentee:
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| Harvey E. Brown (exact or similar names) - St. Louis, MO |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 26, 1890 |
| Granted: |
Jun. 23, 1891 |
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Joel Havens
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Description: |
| My invention relates to a device for measuring or testing work while in motion; and my invention consists in features of novelty hereinafter fully described, and pointed out in the claims. This instrument in all of its forms is designed to test the object being worked upon while in motion, and it is designed, to be used where a very accurate degree of trueness is desired, and its use not only obviates the necessity of stopping the machinery to measure the object, but also affords a means for testing the trueness to the very greatest amount of accuracy of all parts of the object being worked upon.
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