An actuating structure is provided for a lock having a barrel with a plug which is key-actuated for rotation therein, and a switch having a shaft and rotor rotatable with the plug. A first lug is fixed relative to the barrel and a second lug rotates with the plug. A first stop washer is provided having two slots therein, one slot receiving the first lug to allow limited rotation of the first washer relative to the barrel and the other slot receiving the second lug to allow limited rotation of the first washer relative to the plug. A second stop washer is also provided having two slots therein, one of the slots receiving the first lug to allow limited rotation of the second washer relative to the barrel and the other slot receiving the second lug to allow limited rotation of the second washer relative to the plug. A spring is provided to rotationally bias the stop washers in opposite directions.

A lock mechanism incorporating a coupling device through which rotation of a lock plug is transmitted to a bolt actuating shift, and which readily allows for interchangeability of key removable locking cores of different axial lengths in a door knob in any of a plurality of different positions of rotation of the lock plug.

This invention is directed at a key lock switch having antistatic means. The antistatic means include a tubular element and a tubular antistatic wall which extends from a mid-plate and a tubular engagement portion which extends from the actuator of the switch. The antistatic wall circumscribes the tubular element in spaced relation. When the mid-plate is engaged to the actuator the tubular engagement portion is positioned between and in spaced relation to the antistatic wall and the tubular element.

An actuating structure is provided for a switch lock having a barrel with a plug which is key actuated for rotation therein. An actuator interconnects the rotatable plug with a rotatable shaft of the switch and cooperates with a rotatable stop plate connected to a return spring. Specifically, an actuator lug and a stop plate surface which engage upon rotation of the plug in one direction to turn the switch momentarily from the first position to a second position against the action of the spring. The actuator also rotates in the opposite direction independently of the stop plate to turn the switch from the first to a third position.

A lock is disclosed having a lock barrel with an opening and a key plug rotatable within the opening. The plug is rotatable between first and second operative positions and a third position in which the plug can be withdrawn from the barrel. A tab on the plug abuts a barrel shoulder to hold the plug in the barrel except when the plug is in the third position, where the tab is aligned with an axial slot to permit axial withdrawal of the plug from the barrel. At least one tumbler is adapted to lock the plug against turning, and another tumbler is adapted to prevent the plug from turning to the third position and to allow rotation between the first and second positions. One key operates the one tumbler to permit rotation between operative positions and a second key operates the other tumbler to permit axial withdrawal of the plug from the barrel.