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| Number | Title | Issue Date |
| 7358740 | Thermal switch with self-test feature A normally open thermal switch (200) having a bimetallic disk (18) is configured for operational testing in its installed position when exposed to a changing temperature by a test box (400) having a power source (400a). The in-plac... | 04/15/2008 |
| 7333313 | Multiplexed temperature sensing circuit for HID lamp ballast A temperature sensing circuit for a ballast for a HID lamp multiplexes the temperature measurement function with another function to reduce the number of pins required for the temperature measurement function performed by the microcontroller of the ballast. The circ... | 02/19/2008 |
| 7261243 | Thermostat responsive to inputs from external devices A thermostat is provided that receives one or more inputs from at least one heating system of a climate control system, and initiates an appropriate action in response to the input. The thermostat can turn off a heat pump providing substandard heat and responsively ... | 08/28/2007 |
| 7260446 | Temperature protection method for machine tool A method of protecting a rotating device, loaded by temperature of a machine tool with one temperature sensor on that device and a temperature bloc, comprising the steps of inputting specific parameters in the temperature bloc, estimating a value for the device temp... | 08/21/2007 |
| 7234864 | Measurement of multi-channel cold junction temperature The cold junction temperature of the channels on a multi-channel terminal block are accurately determined for each terminal pair without affixing a thermistor to each terminal. One embodiment provides accurate cold junction measurement of a six channel device (12 te... | 06/26/2007 |
| 7208704 | Heating device with thermostat switch A system for wiring a heating element in an electrical appliance to a conventional thermostat switch in a new manner and a new thermostat for supporting the new wiring system. The new wiring system avoids switching the full heating element current for both hot power... | 04/24/2007 |
| 7123018 | Switching status determination device and method for determining switching status A sampling voltage is periodically applied between contacts of a switch of a device to determine a status of the switch. When a CPU is in a sleep state and the status of the switch is determined closed, the CPU is activated. The sampling voltage when the CPU is in t... | 10/17/2006 |
| 7095235 | Monitoring device, electrical machine tool, current supply device, and associated method of operation A monitoring device for an electrical machining tool, in particular for temperature monitoring with an accumulator-driven machine, includes a switch element (12) for separating an electrical consumer (14) from a current supply device (10). For d... | 08/22/2006 |
| 7023215 | Field effect sensor two wire interconnect method and apparatus A field effect sensor interfaces with a power supply and detection circuit using two wires. The detection circuit can determine which of several parallel-connected field affect sensors is or is not activated at any given time. ... | 04/04/2006 |
| 6918312 | Validation device and method A testing apparatus is disclosed that includes an expandable mechanical structure, and logging devices that are coupled to the mechanical structure and serially networked together. The testing apparatus of the present invention is utilized to accommodate storage uni... | 07/19/2005 |
| 6798219 | Electronic device for monitoring the temperature of a medium to be monitored and method for implementing the same Electronic device for monitoring the temperature of a medium ensures that the temperature has not reached pre-established index limit values. The device includes contacts for closing an electric charge flow circuit when the temperature reaches an index limit value, ... | 09/28/2004 |
| 6701795 | Method for testing a heating system A method for testing a heating system with at least one basic unit, which controls activating elements of individual heating circuits, with the basic unit being connected with setting units. To simplify the testing of such heating systems, the elements av... | 03/09/2004 |
| 6583633 | Measuring device, especially for a heating/air-conditioning installation A temperature-measuring device for a heating/air-conditioning installation, having sensors biased by at least one electrical power-supply source including at least one series branch exhibiting a first and a second terminal coupled to terminals of a power-... | 06/24/2003 |
| 6496097 | Dual circuit temperature controlled switch A temperature responsive switch includes a housing, an actuator arm for movement in response to temperature conditions, a movable contact, and an adjustable contact connected to a auxiliary terminal for completing an auxiliary circuit. The movable contact... | 12/17/2002 |
| 5957374 | Voltage boosting system and method for electronic thermostat relay A microprocessor-controlled electronic thermostat system and method that detects the status of a thermostat output relay to determine if the relay has been set to a state as requested by the microprocessor and, if not, providing a boosted or increased vol... | 09/28/1999 |
| 5803603 | Portable thermostat testing device A portable thermostat testing device for testing the trip temperature of a thermostat includes a testing block having a smooth, flat top surface, heat dissipating legs, a bore and a pair of grooves. A heater is positioned between the pair of grooves and a... | 09/08/1998 |
| 5801461 | Device for monitoring the operation safety of power switches A device for monitoring the safety operation of power switches, in particular vacuum power switches in medium voltage switchboards. The device has a microprocessor unit that consists of a microprocessor, a microprocessor control and process-oriented stora... | 09/01/1998 |
| 5648722 | Apparatus and method for determining the state of an electrical switch within an HVAC system An apparatus and method for determining the state of a switch for use in an HVAC system. The apparatus and method are advantageously configured for use within a heating, ventilation and air conditioning (HVAC) system, in which the sensing of the state of ... | 07/15/1997 |
| 5317471 | Process and device for setting a thermal trip device with bimetal strip A thermal setting process of the bimetal strip consists in securing an adjusting pin to the trip bar by means of laser welding when the bimetal strip reaches a first preset temperature, and then checking tripping at a second temperature with or without ac... | 05/31/1994 |
| 4947122 | Method and apparatus for adjusting a bimetal trip element A method and apparatus for adjusting a bimetal trip element. The object is to provide a method to adjust bimetal trip elements for electric switching devices, which produces a reliable result in a standard number of adjustment steps. Based on the measurem... | 08/07/1990 |
| 4789834 | Method and apparatus for testing of induction motor overload protection device A method and apparatus for testing the operability of an overload protection device for an induction motor, rapidly and without the need to mechanically load the motor output shaft. A rectifier circuit converts a standard AC input power signal to an unfil... | 12/06/1988 |
| 4463571 | Diagnostic monitor system for heat pump protection A method and apparatus for monitoring the protective circuit associated with a heat pump system wherein both the high pressure switch on the condensor side of the compressor and the low temperature switch on the evaporator side of the compressor are conti... | 08/07/1984 |
| 4258325 | Thermostat and method of testing thereof A thermostat is disclosed and claimed in which a totally enclosed switch is operated by a bimetal snap disc. The housing is provided with a small opening through which a testing probe may be inserted to test the gaging of the assembled device. Such openin... | 03/24/1981 |
| 4092586 | Temperature-sensing circuit A temperature-responsive circuit comprising an ECTS reed switch and an interrogation means for determining the operability and accuracy of the temperature-responsive portion of the circuit.... | 05/30/1978 |
| 3947758 | Disc thermostat test system and method The disclosure relates to a system and method whereby bimetallic discs as well as a completed thermostat can be dynamically tested non-destructively. The bimetallic disc can be tested by utilizing its magnetic properties, the magnetic properties of the di... | 03/30/1976 |
