US Patent: 1,227,400
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| Electric motor
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Patentee:
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| Michael von Dolivo-Dobrowolsky (exact or similar names) - Wilmersdorf, near Berlin, Germany |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 25, 1914 |
| Granted: |
May 22, 1917 |
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Jeff Joslin
Vintage Machinery entry for General Electric Co.
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Description: |
| This motor is intended to drive a clock, but it is not a true synchronous motor, but rather it is a DC motor with a generator portion that provides a force to counter any change in speed due to voltage fluctuations.Dolivo-Dobrowolsky, a Polish-Russian who had lived in Germany for years, left for Switzerland with the outbreak of World War I. He became a Swiss citizen but had apparently returned to Germany by the time this patent was issued. He died of a heart ailment in 1919, age 57. His lack of strong association with a single country is perhaps part of the reason he is not more famous: no country has chosen to promote him as the pivotal electrical innovator that he was. |
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