| 摘要 |
An entry control and security system in the form of a pre-assembled door and door frame unit having an electric light, a motion detector, a radiant energy receiver and an electromechanically actuated latch all disposed on and built into the door frame. The invention provides an economically manufactured and easily installed unit which allows persons to unlatch a door by remote control in order to gain access to a building, as well as providing illumination in the vicinity of the doorway during periods of darkness. A radiant energy receiver, such as a radio frequency receiver, is disposed on the door frame and is electrically coupled with at least one electromechanical door latch also disposed on the frame. A keychain-sized remote control transmitter unit is carried by a person desiring access to the building. When a button on the remote control unit is pressed, the remote control unit transmits a coded signal which is received by the radiant energy receiver. If the signal bears the proper code, the latch is actuated to unlatch the door, allowing it to be pushed open with no further fumbling with keys, door knobs or manually actuated latches. |
