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| Number | Title | Issue Date |
| 6949874 | Electrode system An electrode system, particularly for installation in an exhaust line, has a holding body made of an insulating material, on which at least one operating electrode is positioned. The holding body has a heating device for facilitating easy cleaning in the installed p... | 09/27/2005 |
| 6386030 | Balanced bridge temperature regulator for an air-mass flow meter A temperature regulator, circuit for an air-mass flow meter in which the temperature regulator circuit includes a bridge circuit one of whose bridge branches contains a temperature resistor of substantially higher resistance than a heating resistor in the... | 05/14/2002 |
| 5136305 | Ink jet printer with ink supply monitoring means A carriage type ink printer having a replenishable ink cartridge and ink jet printhead mounted on the carriage for translation across a printing region of an ink jet printer. The replenishable ink cartridge having means to keep the necessary negative pres... | 08/04/1992 |
| 5053605 | Device for thermal regulation of an enclosure In a device for thermal regulation of an enclosure comprising a temperature-measuring circuit which consists of a resistor bridge, of at least one heat-sensitive element on one bridge arm and of an amplifier, a control signal which is representative of th... | 10/01/1991 |
| 4977431 | Fixing apparatus and method of controlling temperature of the same A fixing apparatus detects the surface temperature of a heat roller, detects either the temperature of a press roller which press-contacts the heat roller and incorporates a heater, or the temperature of an external heating apparatus which heats the exter... | 12/11/1990 |
| 4888471 | An improvement in a device for high accuracy thermal regulations of an enclosure In a device for thermal regulation of an enclosure comprising a temperature-measuring circuit which consists of a resistor bridge, of at least one heat-sensitive element on one bridge arm and of an amplifier, a control signal which is representative of th... | 12/19/1989 |
| 4692598 | Temperature controller system A temperature controller for an incubator or an oven for keeping the temperature in a chamber at a constant level by controlling the energization of heaters. The temperature controller is provided with two temperature control systems, each of which compri... | 09/08/1987 |
| 4686450 | Fluid flow sensor A fluid flow sensor especially adapted for use in solid state electronic system. The sensor employs a heated thermistor in a first sensing network with a temperature compensation means, the two being connected in common to a sensor point. A second network... | 08/11/1987 |
| 4639611 | Bridge circuit system A sensing circuit system including circuitry for sensing impedance variations of a variable impedance element. As disclosed, a bridge circuit system includes a bridge circuit to which the variable impedance element is couplable. The bridge circuit system ... | 01/27/1987 |
| 4609913 | Fluid level sensor A fluid level sensor utilizes thick film thermistors in a four-thermistor bridge configuration. The bridge is heated by a heater to sense the presence or absence of fluid at a particular level with respect to the thermistors. Upon energizing the bridge wi... | 09/02/1986 |
| 4574230 | Phase-regulated switching circuit The present invention relates to a phase-regulated zero-crossover ac switching circuit. The present switching circuit comprises the components of (a) regulator having a time constant; (b) ac Wheatstone bridge connected with the regulator and amplifier, wh... | 03/04/1986 |
| 4415790 | Microwave oven temperature probe control Control system for a microwave oven or a combination microwave and convection oven where the on time of a microwave generating system is decreased while convection heater on time may optionally be increased as a food product cooks to a predetermined, desi... | 11/15/1983 |
| 4411306 | Thermostat with improved temperature sensing circuit A thermostat with a single control to establish the quantity of set back during heating and set up during cooling.... | 10/25/1983 |
| 4361274 | Electronic temperature control An electronic temperature control circuit is disclosed for use with swimming pool and spa heaters. The circuit employs a thermistor for sensing water temperature, and provides temperature control with a narrow differential. Safety circuits are also employ... | 11/30/1982 |
| 4196382 | Physical quantities electric transducers temperature compensation circuit A physical quantities transducer compensation circuit is provided with at least two compensating bridge circuits. The first of these circuits consists of resistors and a first potentiometer and thermistors where the control element, preferably a second po... | 04/01/1980 |
| 4143550 | Resistance-to-current converter A resistance-to-current converter in which a sensing resistor, such as a resistance thermometer bulb for sensing changes in temperature, forms an arm in a resistance bridge which is periodically excited by a switching circuit interposed between a power su... | 03/13/1979 |
| 4028642 | Circuit for converting a temperature dependent input signal to a temperature independent output signal A bridge circuit for combination with a variable resistance sensor whose resistance may vary as a function of a sensed variable and also as a function of a parasitic variable such as, for example, temperature. The bridge circuit includes at least one vari... | 06/07/1977 |
| 4000454 | Linearization apparatus for a non-linear resistance transducer in a self-balancing bridge connection A linearization apparatus for a non-linear resistance transducer in a self-balancing bridge connection, in which apparatus the non-linear characteristic of the resistance transducer is linearized by changing the voltage impressed on the bridge as the resi... | 12/28/1976 |
| 3943434 | Arrangement for measuring temperatures An improved arrangement for measuring temperatures in which a bridge containing two temperature dependent resistances is used. A first branch of the bridge consists of a parallel connection of two series circuits each consisting of a constant resistance a... | 03/09/1976 |
