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Class Information
Number: 307/650
Name: Electrical transmission or interconnection systems > With nonswitching means responsive to external nonelectrical condition
Description: Subject matter comprising an electronic circuit which has at least one nonswitching control component and is responsive to changes in external nonelectrical condition such as light, temperature, or flame and whereby an output current or voltage varies with variation of the external condition.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6931760 |
Dryer control method and apparatus using the same |
Aug. 23, 2005 |
| 6079121 |
Humidity-modulated dual-setpoint temperature controller |
Jun. 27, 2000 |
| 5737852 |
Dryness control for clothes dryer |
Apr. 14, 1998 |
| 5546041 |
Feedback sensor circuit |
Aug. 13, 1996 |
| 5406137 |
Circuit arrangement for evaluating the signal of a capacitive measuring sensor |
Apr. 11, 1995 |
| 5384534 |
Self-powered electro-optic rotational position sensor with magnetic pickup |
Jan. 24, 1995 |
| 5367265 |
Moisture-sensing controller for a clothes dryer |
Nov. 22, 1994 |
| 4808935 |
Electric set-point transmitter |
Feb. 28, 1989 |
| 4791809 |
Circuit arrangement to detect signals indicating a change in current through a needle lift sensor of an injection nozzle in combustion engines, which is connected to a constant direct voltage |
Dec. 20, 1988 |
| 4700143 |
Output correction circuit for transducer means |
Oct. 13, 1987 |
| 4682157 |
Polar fluid detection system unaffected by power line voltages |
Jul. 21, 1987 |
| 4665311 |
Smoke detecting apparatus |
May. 12, 1987 |
| 4657658 |
Semiconductor devices |
Apr. 14, 1987 |
| 4636053 |
Distance detecting device |
Jan. 13, 1987 |
| 4596965 |
Method of and apparatus for determining amplitude ratios and phase differences of signals of the same frequency |
Jun. 24, 1986 |
| 4570079 |
rf Switching apparatus utilizing optical control signals to reduce spurious output |
Feb. 11, 1986 |
| 4507571 |
Optically coupled input circuit for digital control |
Mar. 26, 1985 |
| 4460836 |
Device using signal integration and storing type image sensing means |
Jul. 17, 1984 |
| 4449188 |
Apparatus and method for controlling humidity |
May. 15, 1984 |
| 4438348 |
Temperature compensated avalanche photodiode optical receiver circuit |
Mar. 20, 1984 |
| 4419627 |
Measuring the moisture content of materials |
Dec. 6, 1983 |
| 4356405 |
Fail-off photosensitive switch |
Oct. 26, 1982 |
| 4330718 |
Humidity sensor and a humidity detection circuit using the humidity sensor |
May. 18, 1982 |
| 4260951 |
Measurement system having pole zero cancellation |
Apr. 7, 1981 |
| 4258719 |
Heart rate measurement system |
Mar. 31, 1981 |
| 4256985 |
Specificity of semiconductor gas sensor |
Mar. 17, 1981 |
| 4249544 |
Method and apparatus for generating signals for adjustment of cigarette rod making machines or the like |
Feb. 10, 1981 |
| 4199727 |
Malfunction detector |
Apr. 22, 1980 |
| 4190804 |
Signal-conditioning circuits |
Feb. 26, 1980 |
| 4188549 |
Acoustically responsive sensor switch |
Feb. 12, 1980 |
| 4172998 |
Condition operated load control |
Oct. 30, 1979 |
| 4161660 |
Apparatus for producing a time-proportioned control signal electronically |
Jul. 17, 1979 |
| 4157506 |
Flame detector |
Jun. 5, 1979 |
| 4146803 |
Fire-responsive control device utilizing thyristors |
Mar. 27, 1979 |
| 4121123 |
Explosively driven plasma current generator |
Oct. 17, 1978 |
| 4112318 |
Condition control system utilizing digital logic |
Sep. 5, 1978 |
| 4112317 |
Pulse amplitude and width detection system |
Sep. 5, 1978 |
| 4096382 |
Photo-current log-compression circuit |
Jun. 20, 1978 |
| 4088904 |
Capacitive transistorized signaling device |
May. 9, 1978 |
| 4087706 |
Electronic level switch control setup |
May. 2, 1978 |
| 4085375 |
Combined angular displacement measuring system and multiplier |
Apr. 18, 1978 |
| 4066968 |
Method and apparatus for providing a periodic control signal, especially for controlling the ignition of an internal combustion engine |
Jan. 3, 1978 |
| 4047113 |
Feedback circuitry for charge digitizer |
Sep. 6, 1977 |
| 4033305 |
Electronic ignition systems for an internal combustion engine |
Jul. 5, 1977 |
| 4024419 |
Apparatus for digitally monitoring an analog parameter of an industrial installation |
May. 17, 1977 |
| 4021794 |
External condition responsive circuit producing alarm when frequency (engine speed) to amplitude signal (oil pressure) ratio exceeds threshold |
May. 3, 1977 |
| 4020488 |
Alarm and/or control apparatus |
Apr. 26, 1977 |
| 4015209 |
Carrier wave compensator with interference suppression circuit means |
Mar. 29, 1977 |
| 3999134 |
Method and apparatus for measuring the density of filling material in rod-shaped smokers' products taking into account the moisture of the filling material |
Dec. 21, 1976 |
| 3999133 |
Automatic gain control for transducer circuit |
Dec. 21, 1976 |
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