Apparatus for producing a punched tape record for recording working conditions of machine tools

Claim 1

Apparatus for producing a punched tape record to be fed to a computer for automatically and centrally computing the efficiency of machining performance for a plurality of machine tools, comprising a time code generator receiving clock pulses and converting said pulses into time data expressed in terms of binary-coded-decimal digits; first memory devices, one for each machine tool, for memorizing binary-coded-decimal-digit data concerning the machine tool; second memory devices, one for each machine tool; a gate device for transferring, in response to a pulse signifying the commencement or the completion of a machining operation or the beginning or the ending of an idling time, said binary-coded-decimal-digit time data and the memory contents of the first memory devices into the second memory devices for each machine tool; and means for sequentially scanning the memory contents of each of the second memory devices at a speed synchronized with the punching speed of a punch device, to which the sequentially scanned memory contents of the second memory devices are passed and by which the memory contents are punched into a tape.