Electrically operable door locking apparatus and method for operating the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 2, 1999
Grant Date -
N/A
app pub date -
May 5, 1997
filing date -
May 5, 1997
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An electrically operable door lock apparatus is disclosed which may be installed on a door through which access is to be controlled by an electrically operable security system, whereby the door opening mechanism is selectively locked and unlocked by controlling the supply of electricity to the door locking mechanism to thereby control access or egress through the door. The electrically operable door lock apparatus uses an electromagnetic actuator to drive a locking member in reciprocating movement between a locked position in which it engages a latch actuating member to prevent it from being rotated to retract a latch bolt to open a door, and an unlocked position in which it is disengaged from the latch actuating member to allow it to be rotated to retract the latch bolt to open the door. By reversing the position of the electromagnetic actuator in the door lock apparatus, the system may operate in either a fail secure mode in which the electromagnetic actuator must be powered to unlock the door, or a fail safe mode in which the electromagnetic actuator must be powered to lock the door.
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