Resources Contact Us Home
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
Request routing based on class
Precoding codebooks for MIMO communication systems
Integrated control system for stability control of yaw, roll and lateral motion of a driving vehicle using an integrated sensing system to determine longitudinal velocity
Method and system for reduction of quantization-induced block-discontinuities and general purpose audio codec
Use of physical deformation during scanning of an object to generate views of the object
Solid state lighting circuit and controls
Digital broadcast receiver and method for processing caption thereof
  Randomly Featured Patents
Method and apparatus for correcting drift in the response of analog receiver components in induction well logging instruments
Preparation of powders suitable for conversion to useful .beta.-aluminas
Electrical filter/protector, and methods of constructing and utilizing same
Method of producing oxide surface layers on metals and alloys
Revocation list update for devices
Showcase structure
System and method for customized file comparison
Methods for growth of relatively large step-free SiC crystal surfaces
Removing undesirable nanotubes during nanotube device fabrication
Ink jet recording method and recording matter