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
Clock generator circuit for a charge pump
Process cartridge and electrophotographic image forming apparatus
Peer to peer (P2P) missing fields and field valuation feedback
Insulin derivative
Method for incubating the contents of a receptacle
Transmitting apparatus and retransmitting method
Variety corn line LIC7382
  Randomly Featured Patents
System and method for automatically collecting images of objects at geographic locations and displaying same in online directories
Fixed subscriber unit of wireless local loop system
Apparatus and method for storing data into incompatibly formatted storage systems
Free piston internal combustion engine with rotating piston
Controller and control device for a low-pressure fluorescent lamp
Resorbable, macro-porous non-collapsing and flexible membrane barrier for skeletal repair and regeneration
Tool holder for storing pruning and cutting implements
Modular, attachable objects with tags as intuitive physical interface facilitating user interaction with a computer
Secondary storage device using nonvolatile semiconductor memory
Mobile rig on wheels with transverse motion