Detector apparatus of inflammable gas
CA 1237505 A · Owner: Conte, Franco M. · Inventors: Conte, Franco M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to detect the presence of inflammable gas a detector, element is utilized consisting of a coil made with a thin wire of a platinum alloy, enclosed in a Davy cage, the detector is inserted in a resistor bridge circuit and the resistance of the detector changes according to the concentration of the inflammable gas so that above a predetermined concentration the bridge becomes unbalanced to such a degree as to give rise to an electric voltage signal having an amplitude proportional to the density (per cent) of gas present. This signal is utilized to electronically control an alarm and/or telesignaling and/or intervention device. A potentiometer resistor R3 inserted in the bridge …
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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 May 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 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.