High security door locking device

A high security door locking device comprising:

• a locking cylinder including a latch control cam rotatably operable by a properly formed key received within said cylinder;
• solenoid means associated with said cylinder including a movable core and means for resiliently biasing said movable core to extend therefrom when said solenoid means is in an unenergized state thereby to interfere with the rotatable operation of said latch control cam, said movable core being withdrawn from the interfering position upon energization of said solenoid means,
• said latch control cam being beveled on one side to permit rotational movement of said latch control cam in a direction to lock said door locking device by engaging and depressing said movable core with the beveled side of said latch control cam for movement of said latch control cam beyond said movable core in the lock direction but to prevent rotational movement of said latch control cam in a direction to permit said door locking device to be unlocked whereby said high security door locking device can be unlocked only when said solenoid means is energized, and locked whether or not said solenoid means is energized;
• and
• solenoid control means connected to said solenoid means and responsive to entry of a defined code for energizing said solenoid means to permit rotation of said latch control cam in the unlocked direction.

In a high security door locking device, a locking cylinder comprising:

• a cylinder body including a latch control cam rotatably operable by a properly formed key received within said cylinder body;
• and
• an electrical solenoid embedded within said cylinder body, said solenoid including a movable core extending therefrom to interfere with the rotatable operation of said latch control cam unless said solenoid is activated to withdraw said core into said solenoid;
• wherein said movable core is resiliently biased to extend from said solenoid and said latch control cam is beveled on one side to permit rotational movement of said latch control cam in a locking direction by engaging and depressing said core with said beveled side of said latch control cam for movement of said latch control cam beyond said core in a locking direction, said latch control cam being blocked from rotational movement in an unlocking direction by the side opposite to said beveled side engaging said extended core whereby said high security door locking device can be unlocked by operation of said solenoid and locked without operation of said solenoid;
• and
• wherein said movable core and the side of said latch control cam opposite to said one side are ground such that engagement therebetween tends to extend said movable core from said solenoid.

A high security door locking device comprising:

• a locking cylinder including a latch control cam rotatably operable by a properly formed key received within said cylinder;
• solenoid means associated with said cylinder for interfering with the operation of said latch control cam;
• and
• solenoid control means connected to said solenoid means and responsive to entry of a defined code for operating said solenoid means to permit operation of said latch control cam,
• wherein said solenoid control means operates said solenoid means for a selected period of time in response to the entry of a defined code,
• wherein said solenoid means is incorporated into said locking cylinder and includes a movable core extending therefrom to interfere with the rotatable operation of said latch control cam, said movable core being withdrawn by said solenoid means in response to entry of a defined code in said solenoid control means,
• wherein said solenoid control means is programmable to permit said defined code to be selected,
• wherein said movable core is resiliently biased to extend from said solenoid means and said latch control cam is beveled on one side to permit rotational movement of said latch control cam in a direction to lock said door locking device by engaging and depressing said movable core with the beveled side of said latch control cam for movement of said latch control cam beyond said movable core in the lock direction but to prevent rotational movement of said latch control cam in direction to permit said door locking device to be unlocked whereby said high security door locking device can be unlocked by entry of a defined code in said solenoid control means and locked without knowledge of entry of a defined code, and
• wherein said movable core and the side of said latch control cam opposite to said one side are ground such that engagement therebetween tends to extend said movable core from said solenoid.