US Patent: 780,642
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| Speed-changing mechanism
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Patentee:
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| William W. Earl (exact or similar names) - Worcester, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 17, 1904 |
| Granted: |
Jan. 24, 1905 |
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Jeff Joslin
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Description: |
| "My present invention relates to a speed-changing mechanism especially designed to be employed with the reciprocating table of a metal-planing machine, whereby the speed of the table on its cutting stroke may be varied at will, which the speed of the table on its return stroke remains constant..." |
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