Resources Contact Us Home
Door security system

Image Number 2 for United States Patent #4763499.

A door security system for the protection of a lock as well as a set of hinges both associated with a door wherein the security system includes a wrap-around cover plate covering surface portions of the exterior and interior of the door adjacent the lock and the lock side surface around the bolt plate of the lock. In addition, structures designed to protect each of the plurality of hinges serving to hang the door on the hinge jamb thereof include a wrap-around cover plate and hinge pin fittings on the inside of the door and a jamb plate and a vertical bar attached to an exterior section which includes a bar surface that is adjacent to a vertically extensive, exterior surface end region of the hinge cover plate when the door is closed.

  Recently Added Patents
Electronic component and a system and method for producing an electronic component
Touchscreen with Z-velocity enhancement
Method for conductivity control of (Al,In,Ga,B)N
Electronic device
Method and system for tracking mobile electronic devices while conserving cellular network resources
Communication apparatus, communication method, and communication system
Measuring current and resistance using combined diodes/resistor structure to monitor integrated circuit manufacturing process variations
  Randomly Featured Patents
Method and structure for forming a reaction product
Solar collector control system
Method for integrated representation of the parameters of a distance control device
General purpose dental handpiece
Hand-held vacuum cleaner with power brush
Semiconductor device
Startup-time control apparatus and stop-time control apparatus of internal combustion engine, and control methods thereof, and record medium
Process for producing dyed plastic lens
Method and apparatus for performing limited area spectral analysis