Electric discharge lamp with thermal switch
CA 1232317 A · Owner: Gte Products Corporation · Inventors: Muzeroll, Martin E.; Kulik, Joseph S.; Karlotski, Robert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electric discharge lamp has an arc tube within an outer gas filled glass envelope and a thermal switching means is located within the outer envelope. The thermal switching means has a silica support with a pair of electrical conductors affixed thereto and a bimetal strip and a spring-like member are affixed to at least one of the electrical conductors, and upon application of heat the bimetal strip and spring-like member are flexed to short-circuit the electrical conductors and remove any D.C. potential between the main electrode and the starting electrode minimizing electrolysis.
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 February 2, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 2, 2005.
- 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.