US Patent: 1,950,675
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| Friction gear for stepless changing the rotation of a driven shaft
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Patentee:
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| David Hans Heynau (exact or similar names) - Cologne-on-the-Rhine, Germany |
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Patent Dates:
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| Applied: |
Oct. 15, 1931 |
| Granted: |
Mar. 13, 1934 |
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Jeff Joslin
Vintage Machinery entry for Master Electric Co.
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Description: |
| This patent number was seen on a "Speed Ranger" variable speed motor unit from Master Electric Co., along with patents 2,032,015 and 2,199,491. |
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