Electric door strike having dual locking mechanism

摘要

An electric door strike having a keeper rotatably mounted in a fixed strike case for movement between open and closed positions. The keeper includes dual solenoids with a biasing link between the solenoid plungers to urge the plungers to a non-actuated position. Changing the biasing link in the keeper changes the mode of operation. The application of an actuating signal to a solenoid moving the plungers to an actuated position which can be either the fail-safe or fail-secure mode of operation depending on the biasing link employed.