Electromagnetically actuated high dc current switch
CA 1256475 A · Owner: General Electric Company · Inventors: Hickey, John S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
Abstract of the Disclosure, A high DC current switch includes a pair of annular, conductive rails with a pair of brushes mounted for rotary movement therebetween. DC current is conducted by the rails to and from the brushes in directions to electromotively accelerate the brushes into a switching cycle. The rails incorporate a switching gap through which the brushes move. Beyond this switching gap the, rails are split into inner and outer arcuate sections into which current is commutated by the brushes. The directions of commutated current flow to and from the brushes is now such as to decelerate the brushes to a stop.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents.
Why it's free to use
- Granted June 27, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 27, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.