Breathing apparatus with an automatic firing mechanism
CA 1102529 A · Owner: Mine Safety Appliances Company · Inventors: Wise, Layton A.; Menold, Robert F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A candle for producing oxygen when ignited is mounted in the bottom of a chemical canister that is to be inserted in an open-bottom breathing apparatus receptacle provided with a depending projection. A primer for igniting the candle extends through the bottom of the canister and is exposed in the top of a firing mechanism housing secured to the canister bottom. At one side of the primer a hammer has one end pivotally connected to the housing on a transverse axis with a, spring urging the free end of the hammer into contact with the primer. Pivotally mounted in the housing on a transverse axis below the hammer is a trigger having one end engaging the bottom of …
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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 June 9, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 1998.
- 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.