US Patent: 1,254,221
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| Alternating-current motor
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Patentee:
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| Valère Alfred Fynn (exact or similar names) - St. Louis, MO |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 14, 1917 |
| Granted: |
Jan. 22, 1918 |
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Jeff Joslin
Vintage Machinery entry for Wagner Electric Corp.
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Description: |
| "My invention relates to alternate current motors in which the primary is connected to the supply and the secondary is provided with a commuted winding with which co-operate brushes carrying a unidirectional load current and driven at synchronous speed with respect to the primary. In connection with machines of the type described, it has heretofore been proposed to regulate their speed by introducing into the unidirectional load circuit of the secondary a direct-current regulating E. M. F., deriving the same from an auxiliary dynamo electric machine either entirely independent of the alternate current motor to be regulated, or mechanically coupled thereto. The object of this invention is to eliminate this auxiliary dynamo electric machine and to so constitute the motor itself as to make it possible to derive from its primary the direct current E. M. F. necessary for the speed regulation of the machine." |
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