Resources Contact Us Home
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
Collaborative data redundancy for configuration tracking systems
Methods of measuring cell viability in tissue engineered products
Emergency call notification for network services
Semiconductor device, method of manufacturing semiconductor device, and electronic apparatus
Methods of making a diagnostic device by interweaving hydrophobic and hydrophilic fibers, and diagnostic device therefrom
Image capture apparatus and program
Controlling generation of debug exceptions
  Randomly Featured Patents
Sampling probe for granular material
Controllable magnetic bearing apparatus
Device and method for the implementation of an elementary modular operation according to the Montgomery method
Industrial reel wrap with overlapping end tabs
Resolver to digital converter
Release coating for gaskets and manufacturing method
Electron beam radiation curable inks for game balls, golf balls and the like
Comprehensive erase verification for non-volatile memory
Meta substituted arylalkylamines and therapeutic and diagnostic uses therefor