Tape ending indicator for tape recorder

Details Tape ending indicator for tape recorder Tape ending indicator for tape recorder

1975-06-03

1978-06-27

Mautz, George F.

Registers

Platform operated

Platform actuated traffic counters

242 57, 242191, G06M 127, G11B 1906, G11B 1554

Patent

active

040977269

ABSTRACT:
A tape ending indicator comprises a flip-flop circuit responsive to a pulse signal derived from a rotating tape for producing a pulse of an increased width, which is applied to one input of an AND circuit which also receives count pulses of a given, constant frequency from a suitable source. The number of count pulses which are contained in the output signal from the AND circuit is counted in order to detect a change of the count above a first value or below a second value as the diameter of the roll of the taken up tape increases or decreases, thereby indicating the ending of the tape.

REFERENCES:
patent: 3171952 (1965-03-01), Brown
patent: 3564219 (1971-02-01), Mutziger
patent: 3730453 (1973-05-01), Hotchkiss et al.
patent: 3779483 (1973-12-01), Inoue
patent: 3866120 (1975-02-01), Ford
patent: 4001552 (1977-01-01), Muller

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