Coded solid state entry device

摘要: A coded key operated solid state entry system for a controlled access to multiplicity of electronic circuits by the use corresponding keys embodying detection and monitoring system, monitor being activated insertion into keyway particularly adapted successively engage plurality switches which timer timed interval energizes circuit unlatch normally latched tumblers upon rotation extent code key, an optic coupling is energized read, coupler interfaces with comparator functions match read circuit. If not matched circuit, will expire unlatching be caused become de-energized locking up key. re-set another time return their initial position, withdrawal having been achieved matchup.