US Patent: 583,935
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| Series Parallel Controller
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Patentees:
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| William B. Potter (exact or similar names) - Schenectady, Schenectady County, NY |
| Frank E. Case (exact or similar names) - Schenectady, Schenectady County, NY |
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Patent Dates:
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| Applied: |
Oct. 10, 1896 |
| Granted: |
Jun. 08, 1897 |
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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:
The present invention has for one of its objects to reduce the vertical height of the resistance-switch cylinder, at the same time maintaining the necessary insulation between the contacts thereon. This feature of the invention is accomplished by providing two sets of stationary brushes or contact devices adapted to engage with the contacts carried by the resistance-switch cylinder. The brushes are located, preferably, at points diametrically opposite and, as the cylinder reciprocates, are adapted to engage therewith and vary the resistance of the motor-circuit.
Claim:
In a controller, the combination of a cylindrical switch, contacts thereon, and sets of stationary brushes engaging therewith, the brushes and contacts bearing such a relation to each other that the circuit is alternately completed or broken at one set, then at another.
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