Patent FR854467A successfully refreshed from Google Patents.
US3574501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric igniter
Assignee: Robertshaw Controls Co
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Filing: 1969-02-12
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Granted: 1971-04-13
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Expires: 1989-02-12
Abstract
Abstract An electric ignition system for burners utilizing an igniter having a source of high intensity light and a reflector for focusing the light at a point within igniting proximity of the burner to provide a point of high temperature for ignition of fuel emanating therefrom.
Inventors
- 👤 Richard K Mitts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:54
CPC Classifications
F; F23; F23Q; F23Q13/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
An igniter for gas burners comprising in combination: gas burner means; a high intensity incandescent lamp disposed adjacent said burner means; reflector means around said lamp, said reflector means including a housing having a polished ellipsoidal inner surface, said incandescent lamp being mounted through one end of said housing coaxial with the axis of generation of said ellipsoidal surface, the other end of said housing defining an opening coaxial with said axis, and said ellipsoidal surface extending completely from said one end of said housing to the other end thereof and cooperating with said lamp to focus light emanating from said lamp at a point on said axis remote from said reflector means and within igniting proximity of said gas burner means; and high temperature reflective means disposed at said point of focus of light from said incandescent lamp whereby a high temperature is provided at said point for ignition of said gas burner means.
Claim 2
Dependent Claim
155 words
An igniter for gas burners comprising in combination: gas burner means; a high intensity incandescent lamp disposed adjacent said burner means; reflector means around said lamp, said reflector means including a housing having a polished ellipsoidal inner surface, said incandescent lamp being mounted through one end of said housing coaxial with the axis of generation of said ellipsoidal surface, the other end of said housing defining an opening coaxial with said axis, and said ellipsoidal surface extending completely from said one end of said housing to the other end thereof and cooperating with said lamp to focus light emanating from said lamp at a point on said axis remote from said reflector means and within igniting proximity of said gas burner means; and high temperature reflective means disposed at said point of focus of light from said incandescent lamp whereby a high temperature is provided at said point for ignition of said gas burner means.
Claim 3
Dependent Claim
20 words
The invention as recited in claim 1 wherein said focal point is disposed at 1.5 inch centers from said lamp.
Claim 4
Dependent Claim
24 words
The invention as recited in claim 1 wherein an optical lens is disposed in the opening defined by the other end of said housing.
Claim 5
Dependent Claim
100 words
The invention as recited in claim 1 wherein said burner means comprises a burner, conduit means connecting said burner to a source of gas supply, and solenoid actuated valve means in said conduit means to control a flow of gas therethrough, and including a thermistor disposed coaxial to said axis of said igniter and on the opposite side of said burner therefrom, and means including conductors connecting said solenoid valve to a source of electrical power, said thermistor being disposed in series with said conductors to control the energization of said solenoid valve in response to energization of said igniter.
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |