Flame signal stabilization circuit
CA 1114040 A · Owner: Honeywell Inc. · Inventors: Hamelink, William B.; Schilling, Roger A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flame rectification system is disclosed whererin a flame rod is used to detect the presence of a flame to control a relay or solenoid operated valve. Upon the initial indication of a flame, a pulse generating circuit momentarily overrides the flame rod signal and locks in the relay or valve. This allows the flame at the associated burner to stabilize before the relay or solenoid valve can close in the event of a momentary absence of a flame signal which could result from instability during the flame establishing process.
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 December 8, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 8, 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.