Direct digital control device

Details Direct digital control device Direct digital control device

G - Physics

05

D

341/107

G05D 3/00 (2006.01)

Patent

CA 1097771

ABSTRACT OF THE DISCLOSURE A digital control device wherein both an input drive, which, in response to signal pulses, produces a specific increment rotation of an output drive, and a feedback drive, which is driven in proportion to the incremental rotation so produced, are connected to drive a differential gear device, the output of which drives a pair of multi-stage, intermittent drive counting devices, one in a forward direction, the other in reverse. Movement of the last stages of such devices are conditioned to activate said output drive and they are set in null positions wherein a very few advancing increments of movement of the first stage will generate incremental movement of all subsequent stages. When the input drive starts, the last stage of only the advancing counter will advance and activate the output drive in a direction to oppose the input. Return of the counters to null positions will deactivate the output drive.

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