US Patent: 940,342
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| Differential Postive Feed Mechanism
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Patentee:
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| Robert Milne (exact or similar names) - Rockford, Winnebago County, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 09, 1908 |
| Granted: |
Nov. 16, 1909 |
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Joel Havens
"Vintage Machinery" entry for Rockford Drilling Machine Co.
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Description: |
| Banning & Banning - patent attorneys
This feed mechanism is more particularly adapted for use in connection with drill presses, the differential feed mechanism being employed for the purpose of feeding down the drill spindle during the progress of the drilling operation. The mechanism is intended to be used in lieu of the ordinary stepped pulleys, which have been usually employed in the transmission of power from the main power shaft to the drill spindle feed mechanism.
Also see patent #983,745.
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