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
Method for distributing advertisements to client devices using an obscured ad monitoring function
Resist underlayer film forming composition for lithography, containing aromatic fused ring-containing resin
Native NAD-dependent GAPDH replaced with NADP-dependent GAPDH plus NADK
Inductive antenna coupling
Optimized control of an energy supplying system and an energy consuming system
Switching module and switching synchronization system
Wire guide
  Randomly Featured Patents
Method of monitoring membrane separation processes
Integrated circuit device having process parameter measuring circuit
Method for generating a ceramic coating
Storage cassette for a disc having a center hole
Swimming pool interior finish
Motorcycle fairing
Printing apparatus
Image processing device and method
Safety syringe with offset needle
Copolymers of vinyl dioxolanes and maleimides