Abstract: A random timer including a reversible electric drive motor, an output means, and a power circuit connecting a power supply to the drive motor and output means and where two dissimilar cam type timing elements are controlled by the drive motor to provide irregular non-continuous operative phases of output energy, and the power circuit of the motor includes a switch which is opened temporarily by each power phase actuation of the timing elements to provide an opportunity for the drive motor to reverse and change the timer cycle.

Abstract: A random timer including a drive motor, an output means, and a power circuit connecting a power supply to the drive motor and output means and where two dissimilar timing elements are controlled by the drive motor, and the power circuit includes a multi-contact switch having a normally closed terminal position and a normally open second terminal position, a control member associated with the switch to move it from its normally closed position to its second position, and a control means individually engageable with the two different timing elements for moving the control member to its actuated second position and interrupt power flow to the output means on an irregular basis.