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
Systems and methods for reducing narrow bandwidth interference contained in broad bandwidth signals
Method and system for Bluetooth low power link layer connection setup
Methods, systems, and computer program product for virtually modifying surface region curvature to detect protrusions
Video processing system and device with encoding and decoding modes and method for use therewith
Battery comprising circuitry for charge and discharge control, and method of operating a battery
Automated security analysis for federated relationship
Methods for determining decoding order in a MIMO system with successive interference cancellation
  Randomly Featured Patents
System and method to control radial delta temperature
Method and apparatus for moving neck muscles
Electronic apparatus and character string recognizing method
Auxiliary refrigerated air system employing mixture of air bled from turbine engine compressor and air recirculated within auxiliary system
Methods and apparatus for sensing an excessive amount of collected condensed water in an air conditioner
Feeder for robots, automation means and the like
Strained-channel transistor device
Current sensing circuit having at least one sense cell
Joint assembly for links of endless track
Marine propeller mounting device