Class / Patent application number | Description | Number of patent applications / Date published |
340593000 | Switch sensor | 6 |
20090066523 | SWITCHED MODE POWER CONVERTER WITH OVER TEMPERATURE DETECTION - An over temperature detector circuit for use in a switching converter including one or more power switches in accordance with an embodiment of the present application includes a silent sense generator connected to at least one power switch and operable to detect a noise level of the switch and to provide a generator output signal indicative of absence of switching noise and a comparator operable to compare a temperature sensor signal from a temperature sensor with a reference voltage to provide an alarm signal indicating an over temperature condition when the temperature sensor signal exceeds the reference voltage, wherein the alarm signal does not indicate an over temperature condition when the generator output signal does not indicate absence of switching noise | 03-12-2009 |
20110032108 | LARGE CURRENT CARRYING CAPACITOR HAVING A THERMAL DISCONNECT WITH A LIGHT INDICATOR - A capacitor providing a thermal alert includes a wound film capacitor for carrying a large current when coupled to an AC generator. The wound film capacitor includes a hollow core extending from one end to another end of the capacitor. Also included are an in-line thermal switch, which is disposed in the hollow core for sensing a predetermined temperature; and a light indicator, which is coupled to the thermal switch. A single housing is integrally formed from an upper cover and a lower cover for housing the capacitor, the thermal switch and the light indicator. The upper cover of the housing is formed from translucent material. The thermal switch is configured to disconnect the wound film capacitor from the AC generator upon reaching the predetermined temperature, and activate the light indicator to emit a light. The upper cover is effective in transmitting the light from inside the housing to outside of the housing. The light indicator includes an incandescent light bulb, a neon bulb, or a light emitting diode (LED). | 02-10-2011 |
20130154840 | RADIO-BASED HEAT AND FIRE DETECTION PELLETS - A radio-based heat detection pellet is provided. The pellet includes a thermal switch configured to provide a detection signal when exposed to a temperature greater than a predetermined threshold temperature. The pellet further includes a transmitter circuit connected to the thermal switch and configured to transmit an alarm signal to a remote location in response to receiving the detection signal. | 06-20-2013 |
20130249696 | LOAD CIRCUIT DISCONNECTION DETECTOR - A load circuit disconnection detector includes: a current sensor ( | 09-26-2013 |
20160093186 | SURFACE TEMPERATURE-RESPONSIVE SWITCH USING SMART MATERIAL ACTUATORS - Malfunction or failure of mechanical, electrical, and electro-mechanical equipment, for example, equipment used in manufacturing operations, is often preceded by an increase in the operating temperature of at least some portion of the equipment. A temperature-sensitive, active material-containing actuator is pre-selected to operate at a pre-determined temperature indicative of impending equipment failure and placed in thermal contact with the equipment. If the equipment achieves the pre-selected temperature the actuator signals this by closing an externally-powered circuit to enable or provide a suitable alarm signal. Additionally, the actuator may close a second circuit connected to a machine controller to alert the machine controller to take some pre-programmed action. Selected actuators are based on shape memory alloys (SMA) adapted to operate over a temperature range sufficient to encompass the expected range of pre-determined temperatures. | 03-31-2016 |
20160110979 | PNEUMATIC DETECTOR ASSEMBLY WITH BELLOWS - In one aspect, a pneumatic detector assembly is provided. The assembly includes a housing, a sensor tube, a contact pin, and at least one switch having a bellows operatively associated with the sensor tube and the contact pin. The bellows is configured to move into and out of contact with the contact pin based on a pressure in the sensor tube. | 04-21-2016 |