US Patent: 790,541
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| Controller for electric motors
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Patentee:
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| Walter J. Warder, Jr. (exact or similar names) - Chicago, IL |
| USPTO Classifications: |
| 200/9 |
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Patent Dates:
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| Applied: |
Sep. 26, 1904 |
| Granted: |
May 23, 1905 |
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Jeff Joslin
Vintage Machinery entry for Western Electric Co.
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Description: |
| "My invention is especially intended for use in controllers used with motors which operate machine-tools or other machinery requiring variable speed..." |
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