Monitoring circuit for a constant monitoring of a plurality of s

Details Monitoring circuit for a constant monitoring of a plurality of s Monitoring circuit for a constant monitoring of a plurality of s

1998-04-10

1999-12-07

Gaffin, Jeffrey

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361170, 307326, H01H 4732

Patent

active

059993952

ABSTRACT:
A monitoring circuit which allows for the complete monitoring, at short intervals, of several signal inputs and consequently of signal outputs without having to take into account external interference, like for instance the execution time in the case of light barriers, is obtained in that the signal inputs are connected through two capacitors to at least one relay, in that the signal inputs apply a potential to the capacitors while oscillating and in that the capacitors discharge into the relays while oscillating.

REFERENCES:
patent: 3766441 (1973-10-01), Gray
patent: 4034235 (1977-07-01), Wade
patent: 4054935 (1977-10-01), Ginsberg
patent: 4257082 (1981-03-01), Brown
patent: 5543997 (1996-08-01), Ruprecht
patent: 5559664 (1996-09-01), Dogul et al.
patent: 5771146 (1998-06-01), Schlicker et al.

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