Flame responsive system
CA 1053779 A · Owner: Electronics Corporation Of America · Inventors: Macdonald, Malcolm F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flame responsive system includes a flame sensor flame signal, generating circuitry responsive to the flame sensor and flame signal inhibiting circuitry also responsive to the flame sensor. A fast filter and a slower filter are coordinated so that total loss of flame sensor response results in rapid termination of a flame signal output from the flame signal generating circuitry while reduction of a flame sensor response below a set point causes the flame signal inhibiting circuitry to inhibit the flame signal output.
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 May 1, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 1, 1996.
- 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.