Electronic digital tape timer

Details Electronic digital tape timer Electronic digital tape timer

1977-04-29

1979-02-20

Thesz, Joseph M.

Registers

Platform operated

Platform actuated traffic counters

235 92T, 235 92MP, 235 92EV, 235 92R, 360137, G06M 314, H03K 2700

Patent

active

041408969

ABSTRACT:
A digital tape timer containing a counter and associated arithmetic control and timing logic to detect the relative tape position and provide a time-multiplexed, binary coded decimal (BCD) output for the display of the tape position in hours, minutes, seconds and/or tenths of seconds of play/record time at any of the selected tape speeds. The timer employs an eight digit format; five digits are displayed and one of the three remaining digits becomes the least significant digit whose modulus is altered to present the correct division rate to the incoming tach pulses. The counter generates serial digits with one digit appearing on a selected line, whereby all eight digits are transmitted using four wires for the binary code plus one wire for selection of each digit to be displayed. Thus, the system inherently provides the added advantage of time-multiplexing of the timer system output. The pre-division of the tach pulses using the LSD provides division which instantly and accurately follows the counting direction.

REFERENCES:
patent: 3602698 (1971-08-01), Vigour
patent: 3604624 (1971-09-01), Miura et al.
patent: 3764781 (1973-10-01), Kreithen et al.
patent: 3803587 (1974-04-01), Mead
patent: 3930142 (1975-12-01), Meier
patent: 3943338 (1976-03-01), Gagniere
patent: 3986333 (1976-10-01), Kimura et al.

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