Electronic safety device

Details Electronic safety device Electronic safety device

1979-11-20

1982-06-15

Truhe, J. V.

Electricity: motive power systems

Motor-reversing

Periodic- or intermittent-reversing

318266, 318469, 318626, 318798, 361 31, 49 28, E05F 1510, H02H 709, H02P 300

Patent

active

043353398

ABSTRACT:
An electronic safety device circuit is disclosed. This circuit includes two integrated circuit operational amplifiers, the first connected as an operational amplifier and the second connected as a follower. The output pin of the first amplifier is connected to the positive input pin of the second amplifier through a diode. The positive input pin of the second amplifier is connected to a memory capacitor. The output pin of the second amplifier is connected to the negative input pin of the first amplifier. A switching network is provided for grounding the positive input pin of the first amplifier and discharging the memory capacitor.

REFERENCES:
patent: 3254289 (1966-05-01), Hartman
patent: 3609461 (1971-09-01), Obenhaus
patent: 3678622 (1972-07-01), Miller
patent: 3685013 (1972-08-01), Brickner
patent: 3891909 (1975-06-01), Newson
patent: 3993975 (1976-11-01), Long, Jr. et al.
patent: 4074179 (1978-02-01), Kuo et al.
patent: 4217616 (1980-08-01), Jessup
patent: 4247806 (1981-01-01), Mercier

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