Winding for electric machines for apparatus with metal oxide resistors for limiting overvoltages
CA 1303661 C · Owner: Siemens Aktiengesellschaft · Inventors: Meyer, Hartmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
If the coils of electric machines or apparatus are protected against transient overvoltages by metal oxide resistors, there is a danger of thermal aging of the metal oxide resistors by the dissipation heat of the winding. In order to avoid the reduction of the breakdown voltage of the metal oxide resistors connected therewith the latter are, surrounded at least partially by a solid heat insulator of plastic. Exposed parts of the metal oxide resistors are arranged in the cooling air stream of the machine.
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, and the Claude kit works from them.
Why it's free to use
- Granted June 16, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 2009.
- 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.