Coaxial switch with magnetic locking

摘要

A magnetically-locked switch assembly includes a switch unit having internal contact means positioned by an actuator arm between open and closed positions. Unauthorized actuation of the actuator arm is prevented by a locking pin which is displaced to release the actuator arm only in the presence of an externally applied magnetic field. The actuator arm is mechanically actuated from outside the switch housing through a slip-clutch to prevent damage to the actuator arm by application of excessive force when the actuator arm is locked.