A cookbook for using the model-view controller user interface paradigm in Smalltalk-80

A switch actuating device adapted for conjoint rotation with a rotatable assembly of a prime mover. Means for mounting to the rotatable assembly so as to be conjointly rotatable therewith includes a pair of sets of opposite surfaces, and switch operating means conjointly rotatable with the mounting means is arranged for axial movement thereon between a pair of opposite positions. A pair of centrifugal weight members are responsive to the rotational speed of the device to effect the axial movement of the switch operating means between its opposite positions and include a pair of sets of means arranged for guiding engagement on the oppposite surface set pair upon the axial movement of the switch operating means between its opposite positions, respectively. A pair of springs are respectively biased between the centrifugal members. A method of assembling a switch actuating device is also disclosed.