Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Appliance anti-theft and protection circuitry










Image Number 2 for United States Patent #4284983.

New and unique circuitry suitable for being located in electrical appliances, and which protects such appliances from theft and unauthorized movement. More particularly, the invention discloses circuitry for providing an alarm when the appliance is both disconnected and moved. The circuitry monitors both power input and movement of the appliance, and provides a pulsating signal suitable for sounding and audible alarm until the appliance is either reconnected or the alarm interrupted by a key switch. According to one particular embodiment, a mercury interrupter is uniquely arranged to operate as both the motion sensor and the oscillator for providing pulsating power to the audible alarm.








 
 
  Recently Added Patents
Resist underlayer film forming composition for lithography, containing aromatic fused ring-containing resin
Apparatus and method for discharging capacitor of input filter of power supply, and power supply including the apparatus
Display systems with touch screens
Generation, display, and manipulation of measurements in computer graphical designs
Horizontal cable manager
Substrate and patterning device for use in metrology, metrology method and device manufacturing method
Method of sending CTI messages in a communication system
  Randomly Featured Patents
Unfoldable connected structure and method for unfolding the same
Analysis lamp, particularly for the examination of precious stones
Combination telephone set
Shielded male electrical connector
Screw compressor with integral oil cooling
Perimetrically tensioned flexible signage mount
Creative media marketplace system and method
Dance floor construction
Cruise control system for a vehicle
Thermoelectric device and method of making and using same