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Expired Canadian patentCanada

Multiple cantilever spring contact hook switch

CA 1134524 A · Owner: Northern Telecom, Inc. · Inventors: Adams, William J.; Haskins, Steve W.; Wernet, William F.

CIPO record

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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 multiple cantilever spring contact switch has a plurality of cantilever spring contacts in one or more series, with the, contacts of each series clamped between surfaces which provided a predetermined relative inclination of the contacts. A pivotal member is mounted on the switch assembly or actuation by an operating member the, pivotal member in turn actuating the contacts. The contact between operating member and pivotal member is localized so that misalignment between operating member and the switch assembly does not affect actuation ; of the contacts. Such misalignment can occur when the switch assembly or operating member or both are mounted on printed …

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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 October 26, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 26, 1999.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 29, 1980
GrantedOctober 26, 1982
Term endedOctober 26, 1999
Patent numberCA 1134524 A
Classification (IPC)H04M1/08 +1 more

Timeline

Timeline From CIPO dates

1981198319851987198919911993199519971999Application filedJuly 29, 1980Patent grantedOct 26, 1982Term endedOct 26, 1999

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.