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
For a given cell in a spreadsheet, evaluating an unlimited number of conditional formatting rules and applying multiple corresponding formats to the cell
Chip on chip semiconductor device including an underfill layer having a resin containing an amine-based curing agent
ActRIIB proteins and variants and uses therefore relating to utrophin induction for muscular dystrophy therapy
Transcoded images for improved trick play
Apparatus and methods for providing efficient space-time structures for preambles, pilots and data for multi-input, multi-output communications systems
Drug delivery system
Terminal device, system and computer readable medium
  Randomly Featured Patents
Separation of wort from mash
Plug barn
Mobile vertical supporting apparatus for child
Back pressure control for an injection molding machine
Rebreather nebulizer device
Remote identification and speed determination system
Method and apparatus for measurement of jitter
Picture processing system for television
Fuel supply system for boat and outboard motor
Precision vertical registration adjustment device for a printing press