Fire sensing device
CA 1087276 A · Owner: Matsushita Electric Works, Ltd. · Inventors: Suzaki, Satoru; Kameyama, Yasuyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to fire sensing devices to be used for detecting any abnormal heat generation or fire occurrence and to actuate a fire alarm system. The fire sensing device comprises a base body a heat-, responsive switch mounted to the base body and a heat, receiving plate member thermally connected to the switch and expanding around the switch, the heat receiving plate member being provided therein with at least two groups of slits defined by fins formed by being raised from the plate member, the fins in each of the groups being raised respectively in the same direction, and the raised direction of the fins in each of the groups being different from that in the other groups.
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 October 7, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 7, 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.
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.