Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Electrical alarm system for installation in a window casing










Image Number 2 for United States Patent #4553134.

An electrical system is provided for attachment to basement windows or the like for the purpose of sounding an alarm automatically if the window is opened and the device is moved or tampered with. The system comprises a spring-loaded bar or a tube within a tube which is placed in the window frame without the need for screws, adhesive or other fastening means. When installed and spring-loaded, the assembly holds an electric switch in place against the side wall of the window. If the assembly is jarred or moved the switch is released, the electrical connection is either made or broken and an alarm is sounded.








 
 
  Recently Added Patents
Method and system for monitoring service quality in a mobile node
System and method for confirming delivery of an electronic message
Techniques for accessing a parallel database system via external programs using vertical and/or horizontal partitioning
Image processing apparatus
Lettuce sister lines PX06514083, PX06514153, PX06514201 and PX06514204
Synchronization processing circuit and synchronization processing method in wireless communication system
Polymer compositions and nonwoven compositions prepared therefrom
  Randomly Featured Patents
Method and system for obtaining road grade data
Method for testing toxicity of chemical substance by using nematode
Phase/frequency detector, phase locked loop, method for phase/frequency detection and method for generating an oscillator signal
Manual reset control circuit for microprocessor controlled washing appliance
Posture training device
Combined television receiver, radio receiver, cassette recorder and clock
Semiconductor device with semiconductor chip and rewiring layer and method for producing the same
Sulfur-containing fertilizer composition and method for preparing same
Stubble eradicating implement
Pizza pan