US3906221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proof of igniter and flame sensing device and system
Assignee: Individual
•
Filing: 1973-12-10
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Granted: 1975-09-16
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Expires: 1993-12-10
Abstract
Abstract A single device for proving both the presence of an igniter and flame in a fuel burner is provided, the device including means such as a ceramic coating for both transmitting actinic radiation emitted by the igniter and generating actinic radiation upon flame excitation. The ceramic or other means is associated with an actinic radiation transmitting element which delivers the radiation to a photoresponsive element whereby a signal is provided which triggers fuel delivery to the burner when the igniter is an igniting mode or thereafter when flame is present. A method of proving igniter and flame is also provided utilizing such device and electronic circuitry adapted to prove its own integrity.
Inventors
- 👤 Gary M Mercier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:36
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/24; F23N5/242; F23N5/02; F23N5/08; F23N5/082; F23Q; F23Q7/00; F23Q7/06; F23Q7/10; F23N2227/00; F23N2227/12; F23N2227/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
122 words
A device for sensing the presence of a flame and an electrical resistance igniter in the igniting mode in a fuel burner system in combination with a photoresponsive element sensitive to infrared radiation, said device comprising infrared radiation-conducting means having a portion thereof adapted to be located directly within said flame, ceramic cover means associated with and substantially enclosing said portion of said infrared radiation-conducting means, said ceramic cover means being heat stable, visible light opaque, transparent to the passage of infrared radiation emitted by said igniter through said cover means whereby said igniter is sensed by said photoresponsive element and further said cover means emitting infrared radiation upon excitation by a flame whereby said flame is sensed by said photoresponsive element.
Claim 2
Independent Claim
122 words
A device for sensing the presence of a flame and an electrical resistance igniter in the igniting mode in a fuel burner system in combination with a photoresponsive element sensitive to infrared radiation, said device comprising infrared radiation-conducting means having a portion thereof adapted to be located directly within said flame, ceramic cover means associated with and substantially enclosing said portion of said infrared radiation-conducting means, said ceramic cover means being heat stable, visible light opaque, transparent to the passage of infrared radiation emitted by said igniter through said cover means whereby said igniter is sensed by said photoresponsive element and further said cover means emitting infrared radiation upon excitation by a flame whereby said flame is sensed by said photoresponsive element.
Claim 3
Dependent Claim
13 words
The device of claim 1 wherein said infrared radiation conducting means comprises quartz.
Claim 4
Dependent Claim
30 words
The device of claim 1 wherein said infrared radiation conducting element comprises a quartz rod, a fiber optic bundle, and bonding means for optically coupling said rod to said bundle.
Claim 5
Dependent Claim
21 words
The device of claim 1 wherein said cover means comprises a ceramic composition adherably bonded to said infrared radiation conducting means.
Claim 6
Dependent Claim
22 words
The device of claim 1 wherein said cover means comprises a ceramic composition in infrared radiation transmitting relationship to said conducting means.
Claim 7
Dependent Claim
25 words
The device of claim 1 wherein said infrared radiation conducting means is in optically coupled relationship to said photoresponsive element responsive to said infrared radiation.
Claim 8
Dependent Claim
11 words
The device of claim 6 wherein said photoresponsive element is photoconductive.
Claim 9
Dependent Claim
11 words
The device of claim 6 wherein said photoresponsive element is photovoltaic.
Claim 10
Dependent Claim
21 words
The device of claim 6 wherein a nematic liquid crystal is operatively interposed between said conducting means and said photoresponsive element.
Claim 11
Dependent Claim
20 words
The device of claim 3 wherein said optical bonding means comprises an epoxy adhesive optically transmissive to said infrared radiation.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |