Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1988-04-01
1989-08-15
Zazworsky, John
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307355, 307357, 307362, 307364, H03K 524
Patent
active
048577618
ABSTRACT:
A circuit for monitoring a plurality of analog quantities which provides signals for exceeding of threshold values and utilizes a differential amplifier. One input of the differential amplifier is connected to a reference voltage source and the other input is connected to a reference resistor. The quantities to be monitored are represented by voltages or by impressed currents that are supplied to the input of the differential amplifier which is connected to the reference resistor and supplied thereto via decoupling diodes and coupling resistors. A plurality of coupling resistors are connected with reference resistor to form a single voltage divider whose taps receive the representative voltages or, impressed currents and are supplied in graduated steps according to values of the allocated threshold values.
REFERENCES:
patent: 3593285 (1971-07-01), Gillmann
patent: 4039859 (1977-08-01), Horninger
patent: 4341961 (1982-07-01), Komoriya
patent: 4583010 (1986-04-01), Brentnall
Article entitled: "Der Extremsucher, cin kontaktloses Extremwert-und Extremort-Auswahlgerate", in Regelungstedinik, Heft 10, Oct. 1960, pp. 359-363.
Jacopich Werner
Mayr Siegfried
Winter Kurt
Siemens Aktiengesellschaft
Zazworsky John
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