Electronic security system
First Claim
1. An electronic security system, comprising:
- a lock, includinga bolt movable between a locked and an unlocked position,a key-actuated lock cylinder having a bolt cam in contact with said bolt to prevent said bolt from moving when in a locked position, and operable upon actuation to move said bolt to said unlocked position,retractable blocking means for preventing said bolt from moving to said unlocked position when unretracted and allowing said bolt to be moved to said unlocked position when retracted,an electrically powered solenoid operable to retract said blocking means upon switching of power thereto,a microprocessor for controlling the switching of power to said solenoid, anda memory coupled to said microprocessor storing coded data; and
key means insertable into said lock cylinder for supplying power to said solenoid to retract said blocking means and for actuating said lock cylinder to move said bolt to said unlocked position, includinga power supply for supplying power to said solenoid,a memory storing coded data,a controller for controlling actuation of said power supply and controlling data transfer between said memory and said microprocessor, andmeans for establishing electrical connection between said controller and said microprocessor through contact terminals in said lock cylinder for transmission of said coded data;
said microprocessor including means for comparing coded data read from said key means with coded data in said coupled memory, and means for enabling said power supply to power said solenoid when said means for comparing has determined that said coded data from said key means matches the coded data in said coupled memory.
1 Assignment
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Accused Products
Abstract
An electronic security system includes an electronic lock mechanism and an electronic key, each of which is provided with a microprocessor controller and a memory storing data including an ID code. The lock microprocessor changes the ID code stored in its memory upon the operation of the lock by a correct key. The key can only be used to operate the lock once, and thereafter must be reprogrammed by a host computer with the updated ID code for the lock. The electronic lock operates a solenoid which retracts a bolt blocking mechanism which prevents the unlocking of the bolt even when a key having the correct mechanical key cuts is inserted into the lock. Power for operating the electronic lock as well as the solenoid is provided by a power supply within the key.
198 Citations
14 Claims
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1. An electronic security system, comprising:
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a lock, including a bolt movable between a locked and an unlocked position, a key-actuated lock cylinder having a bolt cam in contact with said bolt to prevent said bolt from moving when in a locked position, and operable upon actuation to move said bolt to said unlocked position, retractable blocking means for preventing said bolt from moving to said unlocked position when unretracted and allowing said bolt to be moved to said unlocked position when retracted, an electrically powered solenoid operable to retract said blocking means upon switching of power thereto, a microprocessor for controlling the switching of power to said solenoid, and a memory coupled to said microprocessor storing coded data; and key means insertable into said lock cylinder for supplying power to said solenoid to retract said blocking means and for actuating said lock cylinder to move said bolt to said unlocked position, including a power supply for supplying power to said solenoid, a memory storing coded data, a controller for controlling actuation of said power supply and controlling data transfer between said memory and said microprocessor, and means for establishing electrical connection between said controller and said microprocessor through contact terminals in said lock cylinder for transmission of said coded data; said microprocessor including means for comparing coded data read from said key means with coded data in said coupled memory, and means for enabling said power supply to power said solenoid when said means for comparing has determined that said coded data from said key means matches the coded data in said coupled memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification