Switches: Principle of Operation
Actuating plungers should be operated in the direction of their axis. Where this is not possible the use of actuating levers is recommended. For direct actuation the attack angle should not exceed 30°.
Actuation by sliding cams
Various lever types are available for use with Burgess switches. They are generally stainless steel.
If roller or cam-follower levers are approached in the reverse direction, care must be taken to ensure that the angle of approach is small enough not to jam the lever.
Actuation by Cams
Long roller lever with continuous actuation
Cam-follower levers are particularly well suited for use with plastic actuating cams. Abrupt actuation or release of switch actuators shortens the life of the switches.
For this reason cam should preferably provide a continuous movement. Ideally they should be of cyclodal form.