Control device for motor-reduction units

A control device, comprising:

• at least one cam having a circumferential cam surface, a circumferential shoulder surface recessed relative to said circumferential cam surface, and a notch surface defining a notch in said circumferential cam surface adjacent said circumferential shoulder surface and opening to said circumferential shoulder surface;
• cam mounting means mounting said cam for rotation about an imaginary axis of rotation with said circumferential cam surface rotatable circumferentially about the imaginary axis of rotation;
• a control member having a projection defining a cam follower dimensioned to ride on said circumferential cam surface and be received within said notch and ride on said circumferential shoulder surface;
• and
• control member mounting means for pivotally and slidably mounting said control member to move said control member projection toward and away from said circumferential cam surface and generally parallel to the imaginary axis of cam rotation, said control member mounting means normally positioning said control member with said control member projection bearing against said circumferential cam surface, said control member pivoting to insert said control member projection into the notch in said circumferential cam surface when said cam rotates to bring said notch opposite said control member projection, and said control member sliding generally parallel to the imaginary cam axis of rotation along said notch surface as said cam rotates with said control member projection extending into said notch until said control member projection travels out of said notch onto said recessed circumferential shoulder surface to allow said cam to rotate beyond the position at which said control member projection extends into said notch.