US Patent: 1,474,037
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| Alternating-current motor
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Patentee:
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| Harry Wallace Jeannin (exact or similar names) - Warren, OH |
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Patent Dates:
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| Applied: |
Jan. 17, 1917 |
| Granted: |
Nov. 13, 1923 |
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Jeff Joslin
Vintage Machinery entry for Jeannin Electric Co.
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Description: |
| "A more specific object of the invention is to provide an armature with a progressive commuted winding of the direct current type, in combination with auxiliary taps or leads connecting said winding or the coiled thereof at predetermined intervals with separate contacts, and in combination with means for short circuiting the commutator and also the contacts for said taps or leads when the motor has attained speed, whereby the armature winding acts as a high resistance at starting by virtue of the fact that all of the turns of the winding are in series when the motor is starting, and whereby when the motor is up to speed its commutator is short circuited and the several contacts for the auxiliary taps or leads are also short circuited to connect the different turns of each armature coil in parallel with each other and with the connections brought out to the commutator segments, thereby securing a lower resistance running condition equivalent to that of the squirrel cage winding of the ordinary induction motor."Seen on a Jeannin repulsion-induction motor also carrying the patent dates for 1,209,443 and 1,322,451. |
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