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| Number | Title | Issue Date |
| 8014905 | System and method for demand limiting resistive load management An electricity demand limiting system for limiting the electricity consumption of at least one resistive load device. The demand limiting system includes a consumption controller associated with the resistive load device that is operable to infinitely vary the amoun... | 09/06/2011 |
| 7940675 | Method of communication between reduced functionality devices in an IEEE 802.15.4 network In a 802.15.4 network, each reduced functionality device (RFD) is permitted to communicate with only an assigned full function device (FFD). The present invention allows each of the RFDs to communicate with another RFD upon the RFD determining that the local FFD ass... | 05/10/2011 |
| 7940674 | Method of communication between reduced functionality devices in an IEEE 802.15.4 network In a 802.15.4 network, each reduced functionality device (RFD) is permitted to communicate with only an assigned full function device (FFD). The present invention allows each of the RFDs to communicate with another RFD upon the RFD determining that the local FFD ass... | 05/10/2011 |
| 7667163 | Thermostat with adjustable color for aesthetics and readability The thermostat includes a housing having at least a portion thereof illuminated by a light that changes color via a manual input. The light illuminates the display for easy readability while the variable color of the light allows a user to match the appearance of th... | 02/23/2010 |
| 7544291 | Water purification system utilizing a plurality of ultraviolet light emitting diodes A water purification system utilizing a plurality of ultraviolet light emitting diodes and associated method of use is disclosed. This includes an inlet, an ultraviolet radiation chamber, and an outlet, wherein the inlet is connected in fluid relationship to the ult... | 06/09/2009 |
| 7522063 | Combination thermostat and warning device with remote sensor monitoring A combination thermostat and warning device that is housed within a common housing, such as a housing resembling that for a conventional thermostat. The combination device includes a controller that is operable to control the operation of a climate control device, s... | 04/21/2009 |
| 7486631 | Method of communication between reduced functionality devices in an IEEE 802.15.4 network In a 802.15.4 network, each reduced functionality device (RFD) is permitted to communicate with only an assigned full function device (FFD). The present invention allows each of the RFDs to communicate with another RFD upon the RFD determining that the local FFD ass... | 02/03/2009 |
| 7460933 | Thermostat display system providing adjustable backlight and indicators A user adjustable visual display system and method for a digital thermostat having a backlit user display screen and system operation indicators is provided. The system allows a user to programmatically vary the illumination intensity of the backlit user display scr... | 12/02/2008 |
| 7455240 | Thermostat display system providing animated icons A visual display system and method for a digital thermostat having a user display screen to provide operational status information of the heating and/or cooling equipment controlled by the thermostat is provided. This visual display system utilizes animated icons to... | 11/25/2008 |
| 7423544 | Method of selecting operation in a line-powered module A line-powered module that is selectively operable in one of a plurality of modes of operation based upon the value of a selection signal. The line-powered module includes a control unit that selectively operates the module in one of the plurality of modes of operat... | 09/09/2008 |
| 7311756 | Fanless indoor air quality treatment An indoor air quality system for a structure is provided. The indoor air quality system includes a ventilation system and a corona discharge apparatus. The ventilation system directs air through the structure. The corona discharge apparatus is positioned within the ... | 12/25/2007 |
| 7245475 | Wide input voltage range relay drive circuit for universal defrost timer A wide input voltage range relay drive circuit allowing a more than 2:1 input voltage variation is provided. The circuit utilizes a scaled and rectified bulk voltage to drive the relay coil. As the monitored bulk voltage increases beyond the relay coil rated voltage... | 07/17/2007 |
| 7242288 | Method for initiating a remote hazardous condition detector self test and for testing the interconnection of remote hazardous condition detectors A method of testing the operational status of remotely distributed hazardous condition detectors is provided. The method utilizes the detector's self-test button to initiate a detector self-test. Once the self-test is complete, the detector's alarm is silenced and a... | 07/10/2007 |
| 7226497 | Fanless building ventilator A ventilation system for a building is provided. The ventilation system includes a pair of passages between the interior and exterior of the building and at least one corona discharge apparatus for drawing fluid through the passages. The ventilation system may also ... | 06/05/2007 |
| 7226496 | Spot ventilators and method for spot ventilating bathrooms, kitchens and closets A spot ventilator and method for spot ventilating a localized environment of a building is provided. The spot ventilator includes a passage and at least one corona discharge apparatus. The passage extending between an inlet positioned in the localized environment an... | 06/05/2007 |
| 7182845 | Electrochemical sensing circuit having high dynamic range An electronic sensing circuit for an electrochemical gas sensor cell providing high dynamic range is described. The electronic circuit utilizes an amplifier with a resistive feedback element to provide high sensitivity linear sensing of low detected gas concentratio... | 02/27/2007 |
| 7182805 | Corona-discharge air mover and purifier for packaged terminal and room air conditioners An air conditioning device for heating and/or an environment is provided. The air conditioning device includes a heat exchanging apparatus, a passage, and a corona discharge apparatus. The passage is in thermal communication with the heat exchanging apparatus and ex... | 02/27/2007 |
| 7158023 | Method for testing the interconnection of remote hazardous condition detectors A method of testing the interconnect between remotely distributed hazardous condition detectors is provided. The method utilizes the detector's self-test button to initiate a detector self-test. Once the self-test is complete, the detector's alarm is silenced and an... | 01/02/2007 |
| 7151264 | Inline air handler system and associated method of use An inline air handler system and associated method of use is disclosed. This includes a member, at least one sensor operatively attached to the member, at least one ultraviolet light operatively attached to the member, at least one electronic input device, at least ... | 12/19/2006 |
| 7131460 | Automotive coolant control valve A coolant flow valve for controlling the distribution and flow of coolant to replace the radiator thermostat and heater valve currently used in automotive applications. The valve includes a valve rotor rotationally received in a valve housing wherein the rotational ... | 11/07/2006 |
| 7124777 | Reversing valve with flowsplitter Provided is a reversing valve for reversing flow in a refrigeration system. The reversing valve includes a valve body having first, second, third, and fourth ports disposed into the valve body. A valve member inside the valve body can be selectively moved between a ... | 10/24/2006 |
| 7126487 | Circuit and method for prioritization of hazardous condition messages for interconnected hazardous condition detectors An interface circuit and method for use in interconnected hazardous condition detectors is provided. This circuit and method prioritizes the various hazardous condition alarms to ensure that only the highest priority or greatest threat alarm is sounded when such a c... | 10/24/2006 |
| 7108008 | Reversing valve assembly with improved pilot valve mounting structure Provided is a mounting structure for mounting a pilot valve assembly to a flow reversing valve assembly. The mounting structure includes a mounting bracket and a cover plate. Disposed through a face panel of the mounting bracket is an aperture that defines an axis l... | 09/19/2006 |
| 7095858 | System and method for securely upgrading firmware Upgraded firmware for a microcontroller is created and encrypted to construct a file (116) that can be distributed and installed by technicians in the field. The encryption includes character encryption (210) of the data as well as a second level of bl... | 08/22/2006 |
| 7000849 | Thermostat with configurable service contact information and reminder timers A field programmable or configurable thermostat for an HVAC system is provided. The configurable thermostat allows field programmability of service contact information, including name and contact telephone number information for the installer or service person. The ... | 02/21/2006 |
| 6994310 | Stepper motor driven valve for thermal management and associated method of use A valve for regulating fluid flow and associated method of use. The valve includes a stepper motor, a first valve portion having an inlet port for receiving fluid into the valve, a second valve portion having an outlet port for dispensing fluid from the valve, a thi... | 02/07/2006 |
| 6985080 | Flame sense circuit and method with analog output An analog flame sense circuit is provided that utilizes the flame rectification method of sensing flame. The circuit uses an AC voltage source and discrete components to provide the sensing of the flame current. Either a single-pole or a two-pole filter may be used ... | 01/10/2006 |
| 6976505 | Valve control system for distributing and regulating the flow of coolant A coolant flow valve for controlling the distribution and flow of coolant to replace the radiator thermostat and heater valve used in automotive applications. The valve includes a valve rotor rotationally received in a valve housing wherein the rotational orientatio... | 12/20/2005 |
| 6923211 | Method for distributing and regulating the flow of coolant A coolant flow valve for controlling the distribution and flow of coolant to replace the radiator thermostat and heater valve currently used in automotive applications. The valve includes a valve rotor rotationally received in a valve housing wherein the rotational ... | 08/02/2005 |
| 6918357 | Stepper motor driven fluid valve and associated method of use A valve for regulating fluid flow and associated method of use. The valve includes a stepper motor, a first valve chamber having an inlet port, a second valve chamber having an outlet port, wherein the first valve chamber includes an opening between the first valve ... | 07/19/2005 |
| 6794771 | Fault-tolerant multi-point flame sense circuit A fault-tolerant multi-point flame sense circuit utilizes a single electronic switch to signal the presence or absence of flame to an electronic controller. Multiple flame sense electrodes may be input to this circuit. By configuring these electrodes in accordance w... | 09/21/2004 |
| 6769482 | System and method for switching-over between heating and cooling modes A heating, ventilation and air conditioning (HVAC) device (104) which includes both heating and cooling operating modes provides an easy-to-use interface (110) for selecting the operating parameters of the device (104). The interface (110... | 08/03/2004 |
| 6747375 | Time controls with enhanced timing range A time control unit having both a time base dial that allows the user to set the cycle time duration and a duty cycle dial that allows the user to set the percentage of time a load connected to the time control unit in activated during each cycle time. The time base... | 06/08/2004 |
| 6718838 | Rotary drive mechanism and appliance timer/sequence switch utilizing same A rotary drive mechanism for use with a timer/sequence switch in an appliance is presented. The mechanism converts linear motion from a cam tracker following a programmed cam track to rotary motion to drive a vent damper in an appliance. The rotary motion output is ... | 04/13/2004 |
| 6688333 | Automotive coolant control valve A coolant flow valve for controlling the distribution and flow of coolant to replace the radiator thermostat and heater valve currently used in automotive applications. The valve includes a valve rotor rotationally received in a valve housing wherein the ... | 02/10/2004 |
| 6681805 | Automotive coolant control valve A coolant flow valve for controlling the distribution and flow of coolant to replace the radiator thermostat and heater valve currently used in automotive applications. The valve includes a valve rotor rotationally received in a valve housing wherein the ... | 01/27/2004 |
| 6646566 | Enhanced visual and audible signaling for sensed alarm condition A sensor alarm which provides an alarm notification of a dangerous condition within a monitored space, further provides notice of its current state condition, from among several states, with distinct message comprising a combination of encoded audible and... | 11/11/2003 |
| 6614355 | System and method for sampling an AC switch A microcontroller (122) uses a two-stage algorithm to sample the state of an AC switch (124) connected directly to an input pin (126). An AC line signal (102) is sampled by a pre-filtering routine that samples the AC line signal (102) to determine when a ... | 09/02/2003 |
| 6483052 | Electromechanical appliance programmer/timer A programmer/timer having a cam disk that includes concentric cam tracks having multiple working heights formed on one face thereof. The programmer/timer further includes a plate assembly that includes multiple cam followers for engaging cam disk and a pl... | 11/19/2002 |
| 6381518 | Electronic oven temperature controller having adaptable temperature regulation limits An oven temperature controller for regulating temperature to a temperature setpoint over a temperature range in an oven compartment comprising a microprocessor and memory storage means. The memory storage means stores temperature setpoint related informat... | 04/30/2002 |
