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Browse by Category: Main > Electrical & Energy
Class Information
Number: 361/181
Name: Electricity: electrical systems and devices > Control circuits for electromagnetic devices > For relays or solenoids > Condition responsive (e.g., external circuit condition) > Proximity or contact > Capacitance change-type
Description: Subject matter wherein the initiating device or circuit responds to a change in capacitance at the detecting electrode.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8373961 Coupling for a fluid line Feb. 12, 2013
8179150 Monitoring system in real time of the state of capacitance graded bushings of power transformers, power reactors, current transformers, circuit breakers and similar May. 15, 2012
7902615 Micromechanical structure for receiving and/or generating acoustic signals, method for producing a micromechanical structure, and use of a micromechanical structure Mar. 8, 2011
7564247 Operating element with a proximity sensor and shield Jul. 21, 2009
7504943 Object detecting apparatus Mar. 17, 2009
7229385 Wearable device Jun. 12, 2007
7218498 Touch switch with integral control circuit May. 15, 2007
7202796 Device and method for triggering a sensor for cables Apr. 10, 2007
7193833 Electric switch Mar. 20, 2007
7177132 Method and apparatus for determining a switching signal state Feb. 13, 2007
6885365 Glass touch sensing circuit Apr. 26, 2005
6442013 Apparatus having capacitive sensor Aug. 27, 2002
6429782 Detection system and switch device Aug. 6, 2002
6376939 Sensor apparatus and safety apparatus for protecting approach to machines Apr. 23, 2002
5796355 Touch switch Aug. 18, 1998
5796183 Capacitive responsive electronic switching circuit Aug. 18, 1998
5760715 Padless touch sensor Jun. 2, 1998
5757196 Capacitive switch actuated by changes in a sensor capacitance May. 26, 1998
5719450 Touch responsive electric power controller Feb. 17, 1998
5666010 Safety system for machine tools Sep. 9, 1997
5621290 Movable-window safety device Apr. 15, 1997
5572205 Touch control system Nov. 5, 1996
5554973 Electrostatic capacitance-type sensor Sep. 10, 1996
5498914 Capacitive sensor circuit Mar. 12, 1996
5410148 Safety switch system with photooptical and capacitance detection Apr. 25, 1995
5396222 Ergonomic machine actuator Mar. 7, 1995
5363051 Steering capaciflector sensor Nov. 8, 1994
5276294 Elevator button improved to function as a lock Jan. 4, 1994
5235217 Capacitive press control actuation system Aug. 10, 1993
5212621 Proximity switched machine control method and apparatus May. 18, 1993
5134259 Palm button switch apparatus Jul. 28, 1992
4950084 Capacitive sensor Aug. 21, 1990
4937702 Light intensity controller using a proximity sensor Jun. 26, 1990
4924122 Low leakage, A.C. proximity-switch circuit May. 8, 1990
4887066 Capacitive obstacle detector for vehicles in reverse gear Dec. 12, 1989
4850386 Soil Moisture monitor Jul. 25, 1989
4831279 Capacity responsive control circuit May. 16, 1989
4812674 Safety gate limit switch using Hall effect transducer Mar. 14, 1989
4794273 On/off control system for power operated hand tools Dec. 27, 1988
4760490 Proximity switch device Jul. 26, 1988
4728932 Detector for capacitive sensing devices Mar. 1, 1988
4722021 Safety circuit for hand tools, and method for safe operation thereof Jan. 26, 1988
4689492 Switching circuit Aug. 25, 1987
4683381 Controlled-access apparatus for the agricultural food industries Jul. 28, 1987
4682272 Method of testing and adjusting a picofarad detecto circuit Jul. 21, 1987
4679117 Touch sensor for wire stripper Jul. 7, 1987
4667147 Inductive proximity switch May. 19, 1987
4650314 Film inspection machine Mar. 17, 1987
4639824 Touch sensor for wire stripper Jan. 27, 1987
4507603 Apparatus for the measurement of the movement of a member horizontally relative to a datum Mar. 26, 1985

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