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| Number | Title | Issue Date |
| 6931760 | Dryer control method and apparatus using the same A dryer control method provides for selection among a plurality of dryness levels so that the user may select a desired degree of dryness for any given type of laundry. The method includes steps of selecting one among a plurality of dryness levels; driving a drying ... | 08/23/2005 |
| 6079121 | Humidity-modulated dual-setpoint temperature controller A humidity-modulated dual-setpoint temperature controller is disclosed in which the two setpoints of the temperature controller are adjusted as a function of measured humidity. Parameters other than humidity could also be used to adjust the dual setpoints... | 06/27/2000 |
| 5737852 | Dryness control for clothes dryer A dryness control circuit for a household clothes dryer including a power supply circuit and a moisture sensing circuit. The power supply circuit converts high voltage AC power into low voltage, DC power. The low voltage, DC power is supplied to the moist... | 04/14/1998 |
| 5546041 | Feedback sensor circuit A circuit for sensing a parameter, such as temperature, has a single current source and a mismatched differential pair for providing two different currents at a desired current ratio. Each current is provided to a current control element and a sensing ele... | 08/13/1996 |
| 5406137 | Circuit arrangement for evaluating the signal of a capacitive measuring sensor A capacitive humidity sensor circuit in which a one-shot circuit produces pulses having a pulse duration determined by the capacitance of a capacitive sensing element, the one-shot circuit being triggered by the trailing edges of pulses in a pulse train p... | 04/11/1995 |
| 5384534 | Self-powered electro-optic rotational position sensor with magnetic pickup An indicating system for measuring movement of a material, having a magnetic pickup device, waveform conditioning circuit and light signal emitter functioning under the system's own self-made power, having a light waveguide or optic fiber connecting the l... | 01/24/1995 |
| 5367265 | Moisture-sensing controller for a clothes dryer A moisture-sensing circuit for a clothes dryer separates the moisture-sensing and timing functions in a way that minimizes undesirable interaction and reduces effects of tolerances in components, temperature, and supply-voltage. Separate comparators are p... | 11/22/1994 |
| 4808935 | Electric set-point transmitter In an electric set-point transmitter for automotive vehicles, particularly for gas-pedal systems, having an actuating element and a resistance element which is connected to the actuating element, there is provided within the electric set-point transmitter... | 02/28/1989 |
| 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 supply A circuit arrangement to detect signals indicating a change in the current of a needle lift sensor of an injection nozzle in combustion engines, which is connected to a constant direct current supply. This circuit arrangement, which is intended to detect the s... | 12/20/1988 |
| 4700143 | Output correction circuit for transducer means A transducer means for sensing the movement of a component between first and second extreme positions includes a transducer 18 the output of which is applied to one input terminal of a differential amplifier. The output of the amplifier is applied to one ... | 10/13/1987 |
| 4682157 | Polar fluid detection system unaffected by power line voltages A detector for sensing the presence of polar fluids includes a pair of detection probes and a circuit for providing an oscillating voltage across the probes. A power supply for the detector includes a transformer with a split secondary, with at least one ... | 07/21/1987 |
| 4665311 | Smoke detecting apparatus A light sensing apparatus comprising a solid-state photocell responsive to low levels of light connected to an impedance matching buffer stage, a gain controlled amplifier stage and an output amplifier stage; a gain control network controlled by a tempera... | 05/12/1987 |
| 4657658 | Semiconductor devices A semiconductor integrated circuit for sensing a physico-chemical property of an ambient includes a pair of semiconductor devices (Q1, Q2) having a similar geometric and physical structure, one device (Q1) being sensitive to the property, the other being ... | 04/14/1987 |
| 4636053 | Distance detecting device A distance detecting device comprising radiation projecting means for projecting a radiation beam; radiation sensing means which is disposed away from the radiation projecting means with a given length and is arranged to receive a reflected radiation beam... | 01/13/1987 |
| 4596965 | Method of and apparatus for determining amplitude ratios and phase differences of signals of the same frequency An amplitude ratio and phase-difference analysis can be carried out with a measured object provided with a measured branch which is divided from a reference branch from a supply oscillator. The measured branch has 2n switching combinations of p... | 06/24/1986 |
| 4570079 | rf Switching apparatus utilizing optical control signals to reduce spurious output An rf multiplexer includes a plurality of rf switch assemblies for switching a selected rf signal to an output in response to an optical control signal. Each rf switch assembly includes a switch circuit mounted in a conductive enclosure. The optical contr... | 02/11/1986 |
| 4507571 | Optically coupled input circuit for digital control An a.c. input circuit for converting a sensed a.c. voltage into a logic level voltage includes a rectifier for converting the sensed a.c. voltage to a d.c. voltage which is supplied through a coupling impedance to the light emitter of an optical isolator.... | 03/26/1985 |
| 4460836 | Device using signal integration and storing type image sensing means A device using signal integration and storing type image sensing means having the functions of generating an electrical signal corresponding to the integrated amount of incident light, storing it, and putting out said stored signal in time-sequential or -... | 07/17/1984 |
| 4449188 | Apparatus and method for controlling humidity Apparatus for controlling humidity comprises a humidity sensing circuit including a humidity sensing element the electrostatic capacitance of which varies in accordance with the ambient relative humidity, and an air-conditioning system responsive to the s... | 05/15/1984 |
| 4438348 | Temperature compensated avalanche photodiode optical receiver circuit A photodiode receiver circuit having self-contained automatic gain control and which is temperature compensated over a wide operating range contains a resistor coupled in series between a bias power supply and one end of an avalanche photodiode. Self-gene... | 03/20/1984 |
| 4419627 | Measuring the moisture content of materials There is provided a method and apparatus for measuring the moisture content of materials, e.g., tobacco. In cases where the material flow is intermittent, the maximum moisture content of the last sample is indicated and held either for a predetermined tim... | 12/06/1983 |
| 4356405 | Fail-off photosensitive switch A photosensitive switch including control means for turning a load on or off in response to the ambient light level. The switch is so arranged to turn the load off if the components thereof fail.... | 10/26/1982 |
| 4330718 | Humidity sensor and a humidity detection circuit using the humidity sensor A humidity sensor as well as a humidity detection circuit are disclosed, the former employing a humidity sensitive material the electric resistance of which varies in response to the variance of humidity in an atmosphere and the latter employing such humi... | 05/18/1982 |
| 4260951 | Measurement system having pole zero cancellation A pulse IR reflectance plethysmograph system for heart rate measurement and display in a digital watch or as a medical instrument having a novel direct coupled pole zero cancellation circuit that compensates undesirable shaping effects on the heart blood ... | 04/07/1981 |
| 4258719 | Heart rate measurement system A pulsed IR reflectance plethysmograph for heart rate measurement and display in a digital watch or as a medical instrument using, for example, a pulsed LED light emitting diode for transmitting light pulses and a photodiode for receiving light pulses ref... | 03/31/1981 |
| 4256985 | Specificity of semiconductor gas sensor A gas sensor unit designed to indicate the presence of hydrocarbon vapors but be insensitive to carbon monoxide. The unit comprises two TGS sensors, one covered by a semi-permeable membrane and the other uncovered; the uncovered sensor responds to both cr... | 03/17/1981 |
| 4249544 | Method and apparatus for generating signals for adjustment of cigarette rod making machines or the like The wrapped cigarette rod which is formed in a cigarette making machine is monitored by a beta ray detector which generates first signals denoting the density of successive unit lengths of the moving rod. The first signals are compared with a reference si... | 02/10/1981 |
| 4199727 | Malfunction detector Malfunction Detector apparatus has a plurality of sensing means, each sensing means is designed to provide a signal when an operation is performed and a different signal when the operation is not performed. Circuitry is designed to initiate timing and if ... | 04/22/1980 |
| 4190804 | Signal-conditioning circuits A signal-conditioning circuit for use in conjunction with transducers measuring simultaneously steady state and fluctuating parameters, e.g. pressure. The circuit comprises low-pass filtering means, preferably comprising an active filter, for removing the... | 02/26/1980 |
| 4188549 | Acoustically responsive sensor switch A miniaturized acoustically responsive sensor switch that is responsive to localized acoustic sounds including a transducer and a conditioning circuit that is adapted to convert the audio signal produced by the transducer in response to the detection of a... | 02/12/1980 |
| 4172998 | Condition operated load control The disclosed apparatus operates a load in one mode in response to one cyclically occurring event and in a second mode at a specified time in the cycle regardless of the phase of the one event in the cycle. According to a specific embodiment, the apparatu... | 10/30/1979 |
| 4161660 | Apparatus for producing a time-proportioned control signal electronically A solid state electronic controller for humidification devices employs an electronic humidity sensor to create an electronic signal proportional to the humidity in the space to be controlled, and massages or processes this proportional signal to create a ... | 07/17/1979 |
| 4157506 | Flame detector A method and apparatus for processing signals produced by a flame detector. A phase-locked loop is used to generate a binary indication of whether the signal from a flame probe is within a predetermined frequency band. A signal indicative of the average a... | 06/05/1979 |
| 4146803 | Fire-responsive control device utilizing thyristors In a thyristor fire-responsive control device including a fire detector which has a thyristor as output switching means, a control circuit is responsive to the detector. A controlled apparatus is responsive to the detector through the control circuit for ... | 03/27/1979 |
| 4121123 | Explosively driven plasma current generator The generation of intense burst of high energy electrons and/or intense currents of positive ions is accomplished by compressing a magnetic field in the presence of a gas plasma. The gas plasma is contained in a metallic cylinder and the magnetic field is... | 10/17/1978 |
| 4112318 | Condition control system utilizing digital logic A condition control system which utilizes digital logic to respond to the state of the condition being sensed. The control system utilizes a condition responsive element that is energized from an alternating current source and controls a first alternating... | 09/05/1978 |
| 4112317 | Pulse amplitude and width detection system A pulse detection system comprises, in series, a pulse amplitude detector, pulse width detector and a recorder. The pulse amplitude detector comprises a voltage comparator having an input for receiving a voltage pulse, a reference d.c. voltage input, a gr... | 09/05/1978 |
| 4096382 | Photo-current log-compression circuit A photoelectric current log-compression circuit includes a log-conversion diode, a photodiode and an operational amplifier for log-compression. In the negative feedback circuit of the operational amplifier is inserted a thermistor to control the amplifica... | 06/20/1978 |
| 4088904 | Capacitive transistorized signaling device A capacitive transducer providing an output for a signal with respect to an on-off mode which depends on a signal having a step function, the signal source is fed to a transistor or suitable amplifier having its base connected to a capacitance sensing mea... | 05/09/1978 |
| 4087706 | Electronic level switch control setup The present application presents a setup utilizing a float in an enclosed space as a bridging contact, on the basis of the liquid level in the area to control, to activate a semiconductor relay having a time delay for such activation, and is especially va... | 05/02/1978 |
