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
System and method of error reporting in a video distribution network
Base station synchronization for a single frequency network
Hybrid CMOS nanowire mesh device and PDSOI device
Performance monitoring of advanced process control systems
Imaging device and imaging method
Anti-proliferative and anti-inflammatory agent combination for treatment of vascular disorders with an implantable medical device
1,3-diiodohydantoin compound and production method thereof
  Randomly Featured Patents
Image reading apparatus and image forming apparatus having the same
Lighter
Multiple protocol communication interface for distributed transaction processing
Process for production of laminated member
Centroid integration
Apparatus and method for information processing
Miniature garbage incinerator
Method and circuit for facilitating control of AC coupling in an amplifier circuit
Zeolite/catalyst wall-flow monolith adsorber
Dynamic semiconductor memory device