US Patent: 1,490,708
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| Dynamo-electric machine
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Patentee:
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| Marvin L. Norris (exact or similar names) - Fort Wayne, IN |
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Patent Dates:
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| Applied: |
Jun. 21, 1921 |
| Granted: |
Apr. 15, 1924 |
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Jeff Joslin
Vintage Machinery entry for General Electric Co.
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Description: |
| "I employ a short circuiting device which moves axially of the rotor shaft into contact with the commutator to short circuit the rotor winding, the device being actuated by weights which have radial motion only relative to the rotor shaft."This patent number was seen on a GE ½ HP AC induction motor. |
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