US Patent: 155,337
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| Improvement in drills for drilling metal
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Patentee:
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| James Sargent (exact or similar names) - Rochester, NY |
| USPTO Classifications: |
| 81/34 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 20, 1874 |
| Granted: |
Sep. 22, 1874 |
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Patent Pictures:
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Sargent 155,337 |
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George Langford
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Description: |
| A breast drill with 2 gear rings on the main gear. An adjustable shaft allows the speed to be reduced or increased by changing the pinion gears position. The patent drawing seems to show an all metal hand drill with a housing around the gears. |
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