US Patent: 336,780
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| Dynamo Electric Machine
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Patentee:
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| Royal E. Ball (exact or similar names) - New York, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 14, 1885 |
| Granted: |
Feb. 23, 1886 |
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Joel Havens
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Description: |
| Abstract:
This invention has relation to current-regulators for dynamoelectric machines, and has for its object the provision of means whereby the varying magnetic attraction between the armature and field pole-pieces, following changes in the resistance of the external circuit, may be utilized in producing a corresponding or compensating change in the position of the current-strength collectors with reference to the commutator-sections. When the dynamoelectric machine is employed for arc-lighting, the compensating regulation of the collectors with reference to the commutator-sections which is required to properly balance the resistances of internal and external circuits is the reverse of the regulation required for incandescent lighting. Thus the addition of arc lights to a given circuit increases the resistance and necessitates the movement of the collectors toward the poles, so as to increase the current, while in incandescent lighting the addition of lamps decreases the resistance and necessitates the reverse movement of the collectors to increase the quantity of current, the electromotive force remaining constant.
Claim:
In a dynamoelectric machine, a concentrically movable field-magnet constructed and adapted to revolve under the abnormal attraction of the armature, in combination with current-collectors whose positions relatively to said field-magnet are altered by such revolution.
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