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Expired Canadian patentCanada

Monitoring system

CA 1083243 A · Owner: Inductron Limited · Inventors: Kurn, Peter A.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A series of signals are derived from respective transducers, fault detection switches, cubicle door interlock switches and the like at appropriate places in an industrial plant or apparatus. The signals are taken to a system which monitors them for the presence of a fault indicating signal or other signal of interest. The system has a series of scanner devices which are controlled by a logic circuit so as to scan the signals one after the other in a repetitive sequence. Since the transducers, switches and such may be linked one with another so that, when one is producing a fault signal, others later in the sequence may also produce such a signal, the logic system operates so that when a …

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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 August 5, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 5, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 22, 1977
GrantedAugust 5, 1980
Term endedAugust 5, 1997
Patent numberCA 1083243 A
Classification (IPC)G08B26/00 +1 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedJune 22, 1977Patent grantedAug 5, 1980Term endedAug 5, 1997

Sources & verification

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