(57) A lock comprising: a lock bolt, a handle, a bolt actuator (3) which effects movement
of the lock bolt, an actuator operating member (8) and a lock control system (9-19)
the actuator operating member (8) operating the bolt actuator (3) upon movement of
the handle and under the control of the lock control system (9-19), the lock control
system (9-19) including a solenoid (15) and a solenoid energization circuit (17-19),
the solenoid energization circuit (17-19) including a switch circuit (18) which operates
to energize the solenoid (13) upon verification of an input code with a present code,
characterised by the lock control system (9-19) having a control member (11) which
is held against movement by the solenoid (15) when energised, whereby the control
member (11) permits the actuator operating member (8) to operate the bolt actuator
(3) to move the lock bolt with the control member (11) disabling the actuator operating
member (8) when the solenoid (15) is not energised.
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