US Patent: 580,432
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| Speed Indicator
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Patentee:
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| Laroy S. Starrett (exact or similar names) - Athol, MA |
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Patent Dates:
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| Applied: |
May 20, 1895 |
| Granted: |
Apr. 13, 1897 |
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Patent Pictures:
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Ralph Brendler
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Description: |
| A machinist's speed indicator, which is pressed against a rotating shaft to count rotations in a specific time period to calculate RPM.
This tool was produced in large numbers by the Starrett company, but a later improvement to this patent (786,073 - 3/28/1905) was even more popular. |
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