US Patent: 712,537
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| Electric grinding device
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Patentee:
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| Charles S. Hisey (exact or similar names) - Dayton, KY |
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Patent Dates:
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| Applied: |
May 07, 1902 |
| Granted: |
Nov. 04, 1902 |
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Jeff Joslin
Vintage Machinery entry for Hisey-Wolf Machine Co.
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Description: |
| This "portable electrically driven grinding machine" could be hand-held but it was primarily intended for use as an attachment to lathes, planers, milling, machines, etc., for grinding operations. The direct-drive DC motor revolved at about 4500 RPM according to the March 1903 American Engineer and Railroad Journal. |
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