Device for recording host electronic instrument operating on-tim

Details Device for recording host electronic instrument operating on-tim Device for recording host electronic instrument operating on-tim

1983-11-28

1985-08-06

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Determining machine or apparatus operating time or...

377 2, 377 20, 324 76R, 324157, 324142, G07C 304

Patent

active

045340455

ABSTRACT:
The instrument operating time recorder (10) is attached to host instrument (12) and includes a frequency divider (14) for counting line voltage transitions during power-on time and to generate a binary output for a prescaler (20). Prescaler (20) divides by a predetermined value set to the frequency of the host instrument and generates a signal for a digital decoder (24) the output of which can be applied to the readout or display (26).

REFERENCES:
patent: 3939361 (1976-02-01), Aldala et al.
patent: 4080568 (1978-03-01), Funk
patent: 4165485 (1979-08-01), Takahashi
patent: 4180724 (1979-12-01), Councilman et al.
patent: 4261037 (1981-04-01), Hicks
patent: 4463354 (1984-07-01), Sear

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