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
Imaging systems with arrays of aligned lenses
Isocyanates and aromatic hydroxy compounds
Medical tube holder
Optical pulse delay generator
Chlorine dioxide precursor and methods of using same
Ionic liquids having a content of ionic polymers
Ether-based reactive plasticizer for plastic bonded explosives
  Randomly Featured Patents
Bumper edge guard for upholstered seating furniture
Diazepine antiallergy agents
Support for photographic paper
Igniting unit for a cigarette lighter
Driving circuit having differential and H-bridge circuits for low voltage power source
X-ray mask
Matching trip data to transportation network data
Variable period diary
Light emitting device
High temperature material face segments for burner nozzle secured by brazing