Actuator for electrical switches

• Main Author: ZURCHER; ERNST
• Format: Patent
• Language: English
• Published: 22.08.1995
• Edition: 6
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SWITCHES; ELECTRICITY; EMERGENCY PROTECTIVE DEVICES; RELAYS; SELECTORS

An actuator for the rapid connection and disconnection of a switch (10) has a primary shaft (12) , which can be rotated to and fro between a first end setting (18) and a second end setting (18') and possesses a tension lever (16). Seated in a rotationally secure manner on a delivery shaft (14) parallel to the primary shaft (12) is the drive shaft (22), which can be rotated, under the force of the spring-loading arrangement (26), from the disconnect setting (24) into the connect setting (24') and back. The spring-loading arrangement (26) includes a helical spring (28), which acts as a pre-tensioned compression spring and is supported by its spring ends (36, 36') on a respective butt strap (32, 34), which butt straps in turn interact, via driving stops (52, 54, 56, 58), with the tension lever (16) and the drive lever (22). A locking device supports the delivery shaft (14) in its disconnect and connect settings (24, 24') counter to the force of the helical spring (28), which can be tensioned upon the rotation of the primary shaft (12), until the primary shaft (12) has reached the corresponding unlatching setting.