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Class Information
Number: 361/179
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
Description: Subject matter wherein the device or circuit which initiates the operation of the relay or solenoid is responsive to an object coming very close to or touching the device.

Sub-classes under this class:

Class Number Class Name Patents
361/181 Capacitance change-type 67
361/180 Metal presence or absence responsive 54

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8624751 Capacitive proximity alarm circuit and system Jan. 7, 2014
8456792 Secure non-contact switch Jun. 4, 2013
8009045 Method for alerting physical approach Aug. 30, 2011
7932643 Lighting control system Apr. 26, 2011
7932644 Safety switch Apr. 26, 2011
7663492 Method and means for controlling the operation of a machine based upon the wearing of a sensor by a machine operator Feb. 16, 2010
7459910 Contact welding detecting device for relay Dec. 2, 2008
7365955 Material processing machine Apr. 29, 2008
7327335 Display device and an electronic apparatus using the same Feb. 5, 2008
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
7082023 Method and circuit arrangement for function monitoring of an electronic-mechanical position switch Jul. 25, 2006
7076381 Adaptive proximity sensing Jul. 11, 2006
6900728 System to detect user entry into a defined danger zone May. 31, 2005
6885365 Glass touch sensing circuit Apr. 26, 2005
6853531 Material processing machine Feb. 8, 2005
6744391 System for sampling a signal in an electronic instrument using a unipolar A/D converter Jun. 1, 2004
6717514 Alarm system and method Apr. 6, 2004
6683778 Device for use in electric vehicles for detecting adhesion in relay due to melting Jan. 27, 2004
6664661 Proximity switch Dec. 16, 2003
6647133 Fingerprint identification device-equip with a touch sensor for detecting a human finger Nov. 11, 2003
6452501 Automatic shut-off and indication device for an electric heating appliance and electric pressing iron comprising such a device Sep. 17, 2002
6442013 Apparatus having capacitive sensor Aug. 27, 2002
6418004 Safety system utilizing a passive sensor to detect the presence of a hand of a worker and provide a signal to interrupt the operation of a machine Jul. 9, 2002
6411288 Fold-down flat panel display device Jun. 25, 2002
6366442 Vehicular input device including single manual operating unit for operating various electronic devices mounted on vehicle Apr. 2, 2002
6335855 Battery powered programmable remote switch controller Jan. 1, 2002
6281803 Control mat monitoring and warning apparatus and method Aug. 28, 2001
6274829 Wireless inductive coupled switch Aug. 14, 2001
6212052 Contactless safety switch Apr. 3, 2001
6176207 Electronically controlling the landing of an armature in an electromechanical actuator Jan. 23, 2001
6160322 Pulse signal generation method and apparatus Dec. 12, 2000
6130489 Inductive proximity switch Oct. 10, 2000
6115229 Apparatus for identifying the position of an element, in particular a lock bolt of a motor vehicle lock, which can be moved between two end positions, and a method of driving the apparatus Sep. 5, 2000
6104100 Charge transfer load sensor Aug. 15, 2000
6060796 Protective circuit May. 9, 2000
6029578 Method and device for starting a machine Feb. 29, 2000
5991142 Detection of ophthalmic surgical handpiece by injecting current signal Nov. 23, 1999
5984513 Very low current microcontroller operated motion sensor Nov. 16, 1999
5923101 Non-contact key Jul. 13, 1999
5844204 Device for detection of electric current by micro-leakage Dec. 1, 1998
5818129 Non-contact proximity switch and method for programming it Oct. 6, 1998
5818681 Electromagnetic relay drive circuit Oct. 6, 1998
5812356 Computer docking system having an electromagnetic lock Sep. 22, 1998
5796341 Safety and security system for work area Aug. 18, 1998
5716129 Proximity switch for lighting devices Feb. 10, 1998
5666010 Safety system for machine tools Sep. 9, 1997
5554973 Electrostatic capacitance-type sensor Sep. 10, 1996

1 2 3

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