Circuit breakers
CA 1055552 A · Owner: Concordia Sprecher Schaltgerate G.M.B.H. · Inventors: Roth, Adrian W.; Korber, Rudolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A circuit breaker having the advantages of compactness and reliability has contact blades pivotally mounted by pivot bearings on insulators and cooperating with stationary contacts, and telescopically extensible and retractable quenching tubes associated with the contact blades. Actuating mechanisms are connected to the contact blades by linkages the contact blades being arranged in pairs and each comprising at its middle region an elbow linkage allowing the blades to collapse into a space between its pivot bearing and its actuating mechanism. The quenching tubes are pivotally mounted between the upper parts of the contact blades, and return springs are provided for returning the quenching …
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 May 29, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 29, 1996.
- 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.