Remote switching device for smoke detector
CA 1306778 C · Owner: Bernier, Maurice · Inventors: Bernier, Maurice
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The switching device is enclosed in a casing fixed to a wall below a ceiling-mounted conventional smoke detector so as, to be accessible. The switching device includes a holding relay a dry-cell battery and a time-delay circuit. The dry-cell battery replaces a similar battery normally in the smoke detector itself, In normal position, the holding relay connects the battery of the switching device to the circuit of the smoke detector, Whenever the smoke detector sounds a false alarm a, house occupant actuates the holding relay to disconnect the smoke detector circuit and stop the alarm. The battery in the switching device thereafter is connected to the time-delay circuit which returns the …
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 August 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 25, 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.