DEVICE FOR OPENING LIFT SHAFT DOORS IN EMERGENCY Russian patent published in 1994 - IPC

Abstract RU 2021194 C1

FIELD: electrical engineering. SUBSTANCE: device has rectifier 1, standby supply source 2, converter 3, starting and switching over unit 5, relay 11 to connect emergency stop system, set of contacts 3 which cut in voltage monitoring relay 12, two make contacts 6, 4 and three break contacts 7, 8, 10. EFFECT: enhanced reliability. 1 dwg

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RU 2 021 194 C1

Authors

Kolmakov Vladimir Nikolaevich[Md]

Dates

1994-10-15—Published

1991-03-05—Filed