Switch lock with two momentary positions

In a key-operated switch including a lock having a barrel and rotatable plug with key-actuated tumblers and a switch having a shaft rotatable with the plug, an improved switch actuator comprising:

• a first lug fixed relative to the barrel;
• a second lug adapted to rotate with the plug;
• a first stop washer having first and second slots therein, said first washer first slot receiving said first lug to allow limited rotation of the first washer relative to the first lug and said first washer second slot receiving said second lug to allow limited rotation of the first washer relative to the second lug;
• a second stop washer having first and second slots therein, said second washer first slot receiving said first lug to allow limited rotation of the second washer relative to the first lug and said second washer second slot receiving said second lug to allow limited rotation of the second washer relative to the second lug;
• and
• means for rotationally biasing the first and second stop washers in opposite directions.

In a key-operated switch including a lock having a barrel and rotatable plug with key-actuated tumblers and a switch having a rotatable shaft, an improved switch actuator comprising:

• an actuator member connecting the plug and switch for rotation together, said actuator member including first and second outwardly projecting stops;
• first and second inwardly projecting stops in the barrel;
• a first stop washer disposed over said actuator member with a first arcuate inner slot receiving the first outwardly projecting stop and a first arcuate outer slot receiving the first inwardly projecting stop;
• a second stop washer disposed over said actuator member with a second arcuate inner slot receiving the second outwardly projecting stop and a second arcuate outer slot receiving the second inwardly projecting stop;
• and
• means for rotationally biasing the first and second stop washers in opposite directions.

In a key-operated, bi-directional, momentary switch having a lock barrel, a key receiving plug rotatable in said barrel, and a switch connected with said barrel and having a rotor with a shaft, the improvement comprising:

• an actuator member connecting the plug and the shaft;
• a pair of stop washers on said actuator member;
• cooperating surfaces on said actuator and said stop washers which engage to rotate one of the stop washers with clockwise actuator member rotation and to rotate the other of the stop washers with counterclockwise actuator member rotation;
• and
• a coil spring urging the stop washers in opposite directions to hold the actuator member in a maintaining switch position, the spring being wound up by rotation of the plug and actuator in either direction from said maintaining position.