Abstract: A system for automatically controlling the operation of a dryer, periodically produces signals representative of the present temperature of a load to be dried. Heat is applied to the load in response to the signals representative of the present temperature of the load. A circuit determines a time interval for the load to reach one predetermined temperature from another predetermined temperature. That time interval is representative of the present condition of the load. The dryer is shut off when the present condition of the load reaches a predetermined desired condition.

Abstract: A control system for a dryer capable of displacing a load to be dried in at least two directions periodically determines a time interval for the present temperature of the load to reach one predetermined temperature from another predetermined temperature while the load is being displaced in a selected one of the two directions. That time interval is representative of the present condition of the load. A comparater compares the time interval to a reference time interval which is representative of a desired condition of the load. A control circuit applies heat to the load to be dried in response to the result of the comparison. When the time interval equals the reference time interval the load has reached the predetermined desired condition and the dryer is shut off.

Abstract: Programmable sequencer apparatus for enabling an operator to selectively establish sequential energizing patterns for a plurality of outputs and thereafter for causing said plurality of outputs to be selectively energized in the sequences defined is set forth in accordance with the teachings of the present invention. According to a preferred embodiment, programmable sequencer apparatus is provided for controlling the selective energization of a plurality of outputs under conditions where any of the plurality of outputs may be selectively energized as a step of a sequence, a group of steps may be established in a sequence to define a programmed operating formula for equipment to be controlled and a plurality of operating formulas may be established to accommodate various modes of operation.