Electrical transmission or interconnection systems – Plural load circuit systems – Common conductor or return type
Patent
1981-03-03
1982-09-14
Gellner, Michael L.
Electrical transmission or interconnection systems
Plural load circuit systems
Common conductor or return type
307113, H02J 108
Patent
active
043497454
ABSTRACT:
A testing circuit for a control system has a two-state input circuit connected across a plurality of switching devices. The input circuit assumes one state when any one of the contacts is closed and the other state when they are all open. An indicator device shows whether the contacts are functioning correctly.
REFERENCES:
patent: 4095123 (1978-06-01), Takahashi
Adams Keith J. G.
Brightwell Alan
Pegler Stuart M.
Price Barry L.
Weall Paul
British Gas Corporation
Gellner Michael L.
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