US Patent: 524,396
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| Controller for Electric Motors
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Patentee:
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| William B. Potter (exact or similar names) - Lynn, Essex County, MA |
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Patent Dates:
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| Applied: |
Dec. 21, 1893 |
| Granted: |
Aug. 14, 1894 |
| Reissue Information: |
| Reissued as RE12,241 (Jul. 19, 1904) |
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Patent Pictures:
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Joel Havens
"Vintage Machinery" entry for General Electric Co.
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Description: |
| This patent was incorporated into Streetcar motor controllers.
Abstract:
My invention relates to a controller known as a "series parallel controller" by which two or more electric motors acting upon a common load, as for instance, an electric locomotive, may be coupled either in series or in parallel in order to give various degrees of speed and power to the driven mechanism.
Claim:
The combination in an electric controller, of a switch having a multiplicity of contacts, and a blowout magnet having a common pole piece extending from a common core to points adjacent to the several circuit-breaking points of the switch. |
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