AN INSTRUMENT FOR PRODUCING ACCUMULATIVE TRACINGS ON POLYGRAPH RECORDERS
Philip R. Thorne · Psychophysiology · 1965
ABSTRACT A compact, transistorized version of the electromechanical cumulative recorder is described. Advantages include freedom from electrical and acoustical noise, variable step height, and the capability of stepping in either an upward or downward direction. Circuitry is simple, reliable and low in cost.