Simple method for continuous monitoring of electrode rotation rate

Abstract

t a c k a t K1 open. As the vent fully opens, the power to the motor is interrupted by a cam-switch arrangement at the motor. However, K1 and K2 remain energized as they are supplied by the voltage leading to the cam-switch circuitry. When the door is closed, this voltage is also removed and K1 is de-energized. The 110 VAC contacts close at K1 and remain closed at K2 because of the charge on C1; thus, K3 is energized. The pair of contacts at K3, paralleling the manually operated start switches, are closed for a time period determined by C1 (approximately 1 second), and a new cycle is initiated.Switch S1 in the circuit allows selection of the automatic repetitive temperature programming, or, when in the manual position, disconnects K3 so that programming is restricted to one cycle only.