DEVICE FOR INDICATION OF PRESSURE DROP Russian patent published in 1994 - IPC

Abstract RU 2017222 C1

FIELD: electric communications. SUBSTANCE: terminal unit 1 of device has measuring unit 2, power supply 6, generator 15, discriminator 12, two chokes 10, 11, capacitor 13, emergency indicator 4, communication line fault indicator 16, double switch 3 which is connected to communication line 5. Each container 7 has indicator 8 with mercury contact and measuring resistor 9. Capacitor 14 is inserted at end of line 5. EFFECT: increased reliability due to permanent checking operating order of communication line. 2 dwg

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RU 2 017 222 C1

Authors

Podberezin D.A.

Dates

1994-07-30—Published

1991-06-28—Filed