US Patent: 894,782
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Electromechanical device
Rock hammer-drill
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Patentee:
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| George H. Rowe (exact or similar names) - Riverside, IL |
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Patent Dates:
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| Applied: |
Jun. 09, 1908 |
| Granted: |
Jul. 28, 1908 |
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Jeff Joslin
Vintage Machinery entry for Electro-Magnetic Tool Co.
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Description: |
| This invention was an electromechanical impact device. The initial application was a rock hammer-drill for use in mining, but subsequent improvements adapted it for use as a stamp mill (patent 938,708), riveting gun (patents 973,216, 938,709, and 1,298,966), and power hammer (patent 1,024,027). Further improvements for use as a hammer drill are to be found in patents 1,024,025 and 1,024,026. |
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