Apparatus for electromagnetic locking on a lock cylinder for a mechanical/electronic locking system

Locking means for a lock of the type having a lock cylinder with a rotor, a driver mounted on one end of the rotor and restrained against rotation relative to the rotor, a stator substantially surrounding the rotor, electromagnetic locking means mounted adjacent the lock cylinder and a control part having a shaped control surface mounted on a rotatable part of the lock and engageable with the locking means to control unlocking of that rotatable part, wherein the locking means comprises

• an energizable electromagnet coil,
• a tie rod having first and second coaxial, axially movable parts movable between abutting and spaced positions, said first part being axially movable in a first direction by said electromagnet coil and said parts being axially movable together when an energizing signal is provided when said parts are abutting;
• a return spring urging said first part in a direction counter to said first direction;
• and
• a probe fixedly attached to an end of said second tie rod part and engaging said control surface of said control part, said probe preventing rotation of said control part relative to said probe in the absence of an energizing signal provided when said tie rod parts are in an abutting relationship.