Angle repeater means for converting shaft rotation into representative pulsed signals.

摘要

The invention includes an optical pulse-forming switch (30) interfaced with a pair of synchronised flip-flops and a phase detection and counter control circuit (39) which senses rotation extent and direction. The counter control circuit (39) drives a counter (10) that stores the number of passed angular increments and stores direction of rotation, the counter (10) being interrogated and reset at regular time intervals. Thus, the input shaft rotation is converted into a digital quantity by maintaining a running summation of counter values. The operator reference indicator (1) is accordingly brought up to date following each input conversion.