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 of providing an internet web site that assists medical professionals draft a letter of medical necessity or other documentation for transmission to a third party payer on behalf of a pa
System and method for conditionally sending a request for data to a home node
Victim port-based design for test area overhead reduction in multiport latch-based memories
Micromachined devices and fabricating the same
Display systems with touch screens
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
Systems, methods and apparatus for payment processing
  Randomly Featured Patents
Vapor phase corrosion inhibitor-desiccant material
Rechargeable impact wrench
Polypeptides having phospholipase A.sub.2 activity
Plate heat exchanger with a two-phase flow distributor
Color-separation optical system and imaging apparatus
Digital signal filter
Voice communication system
Probe unit for an atomic probe microscope
Imaging lens
Systems, methods and devices for removing obstructions from a blood vessel