Functional description
In the stand-by position the weight bar is resting on the locked weight lever, the wire-rope is engaged in the weight lever with its upper end and in the cam ratchet with its lower end, the cam ratchet is resting at the cam disk whereby the cam lever in turn is caught by the notch of the release lever.
During an actuation the release lever is lifted at its right hand side out of its resting position. By this the cam lever is freed from the notch of the release lever and starts to turn counter clockwise. The cam disk is turning with the cam lever and allows the cam ratchet to pass it after the set time, thus releasing the lower end of the wire-rope. The weight bar is skidding off from the weight lever. The contact surface of the release lever can act on a limit switch, which can be used
to switch on alarm horns or similar at the beginning of an actuation.