DEVICE FOR INTERNAL SURVEILLANCE COMMUNICATION Russian patent published in 1995 - IPC

Abstract RU 2033700 C1

FIELD: wire communication. SUBSTANCE: device for internal surveillance communication has N subscriber's units each incorporating speech unit, loudspeaker of subscriber's unit, call unit, supply unit, first and second light indicators, first and second switches of subscriber's units, subscriber selection unit which comprises loudspeaker and N switches. EFFECT: high reliability of operation, simplified design, small consumption current, independent power supply. 1 dwg

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RU 2 033 700 C1

Authors

Gerzanich Ju.Eh.

Fomin V.V.

Gerzanich T.E.

Dates

1995-04-20—Published

1993-03-31—Filed