US4037113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame detector
Assignee: Forney International Inc
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Filing: 1976-10-26
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Granted: 1977-07-19
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Expires: 1996-10-26
Abstract
Abstract A flame detector device for use with boiler systems has been devised wherein a radiation sensitive means responds when energized by incident radiation of the selective frequency bandwidth to produce a signal indicative of the existence of a flame. A light pipe means includes a lens system for collecting incident radiation in a selected combustion zone of the flame and a flexible tube couples the radiation sensitive means and the lens system. A fiber optics bundle conveys the collected incident radiation from the lens system to the detector and is of an extruded high purity unclad quartz material thereof.
Inventors
- 👤 William J. Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:14
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/08; F23M; F23M11/00; F23M11/04; F23M11/045; G; G01; G01J; G01J5/00; G01J5/02; G01J5/08; G01J5/0818; G01J5/0821
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
A flame detector device for a boiler furnace comprising: a movable mounted burner; a radiation sensitive means outside of said furnace and responsive when energized by incident radiation of a selected energy band width to produce a signal indicative of the existence of a flame; a lens of quartz material; a lens housing supporting said lens, said lens housing being connected with said burner so that said lens is focused on the combustion zone of said burner; a flexible tube connected at one end to said housing and at the other end to said radiation sensitive means; and a fiber optics bundle extending through said flexible tube for conveying the collected radiation from said lens to said radiation sensitive means, said fiber optics bundle comprising fibers of extruded unclad quartz material capable of conveying radiation without significant loss thereof.
Claim 2
Dependent Claim
139 words
A flame detector device for a boiler furnace comprising: a movable mounted burner; a radiation sensitive means outside of said furnace and responsive when energized by incident radiation of a selected energy band width to produce a signal indicative of the existence of a flame; a lens of quartz material; a lens housing supporting said lens, said lens housing being connected with said burner so that said lens is focused on the combustion zone of said burner; a flexible tube connected at one end to said housing and at the other end to said radiation sensitive means; and a fiber optics bundle extending through said flexible tube for conveying the collected radiation from said lens to said radiation sensitive means, said fiber optics bundle comprising fibers of extruded unclad quartz material capable of conveying radiation without significant loss thereof.
Claim 3
Dependent Claim
83 words
The flame detector defined in claim 1 wherein said lens in positioned within a bore in said housing and further comprising an elongated annular end piece threaded into the end of said bore adjacent to said combustion zone, said end piece having a plurality of openings for providing passage for moving gases through said openings so as to prevent clogging of the end piece and blockage of the lens by the accumulation of particulate material present in the vicinity of the combustion zone.
Claim 4
Dependent Claim
38 words
The flame detector device defined in claim 2 wherein said housing includes an annular detent in said bore for receiving said lens and said annular end piece engages against and holds said lens in place in said detent.
Claim 5
Dependent Claim
33 words
The flame detector apparatus as recited in claim 1 wherein said fiber optics bundle comprises a bundle of about thirty to forty extruded fibers, each with an outer diameter of about 0.187 inches.
Claim 6
Dependent Claim
24 words
The flame detector apparatus as recited in claim 1 wherein the optical fibers are capable of transmitting energy of the IR through UV range.
Claim 7
Dependent Claim
25 words
The apparatus of claim 1 wherein the optical fibers are capable of transmitting energy in the range from about 2000 angstroms to about 2.5 microns.
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) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |