ERROR DETECTING PULSE COUNTER

摘要

Mechanical counter drivers are adapted to receive counting pulses and to perform a counterdriving operation in response to each of said counting pulses. Input signal generators are coupled to said counter drivers and arranged to be shifted between two positions in response to each of said counterdriving operations. Output signal generators are arranged to be shifted between two positions in response to each of said counting pulses. Said positions assumed by said input and output signal generators have normally a predetermined relation. An error signal generator is adapted to compare the positions of said input and output signal generators and to generate an error signal when said positions of said input and output signal generators have another than said predetermined relation.