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Class Information
Number: 307/653
Name: Electrical transmission or interconnection systems > With nonswitching means responsive to external nonelectrical condition > Flame responsive (e.g., flame acts as a rectifier in circuit)
Description: Subject matter wherein a control or detecting means is constituted by a flame that completes an electric circuit.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4827133 |
Infrared space surveillance detector circuit |
May. 2, 1989 |
| 4710125 |
Safety device for oil burner |
Dec. 1, 1987 |
| 4672324 |
Flame protection circuit |
Jun. 9, 1987 |
| 4599568 |
Electrostatic afterburner light-off detector |
Jul. 8, 1986 |
| 4591725 |
System for amplifying all frequencies detected from a flame detector |
May. 27, 1986 |
| 4538137 |
Fire detector |
Aug. 27, 1985 |
| 4527125 |
Flame detecting apparatus |
Jul. 2, 1985 |
| 4507702 |
Relay controlled load |
Mar. 26, 1985 |
| 4436505 |
Device for detecting flame in open-type combustor and oxygen density of indoor air |
Mar. 13, 1984 |
| 4412809 |
Oxygen density detecting device in combustor |
Nov. 1, 1983 |
| 4307305 |
Precision rectifier circuits |
Dec. 22, 1981 |
| 4300099 |
Fire detecting system |
Nov. 10, 1981 |
| 4280184 |
Burner flame detection |
Jul. 21, 1981 |
| 4245977 |
Method and apparatus for hydrocarbon flame ignition and detection |
Jan. 20, 1981 |
| 4177033 |
Flame detection arrangements and the like |
Dec. 4, 1979 |
| 4168949 |
Flame signal stabilization circuit |
Sep. 25, 1979 |
| 4157506 |
Flame detector |
Jun. 5, 1979 |
| 4146803 |
Fire-responsive control device utilizing thyristors |
Mar. 27, 1979 |
| 4034235 |
Circuits |
Jul. 5, 1977 |
| 3995221 |
Flame responsive system |
Nov. 30, 1976 |
| 3987319 |
Radiation-activated sensor |
Oct. 19, 1976 |
| 3943386 |
Burner fuel supply control signal generating device |
Mar. 9, 1976 |
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