Signals and indicators – Alarms – Rain
Patent
1975-05-15
1976-07-06
Swisher, S. Clement
Signals and indicators
Alarms
Rain
G08B 104
Patent
active
039675777
ABSTRACT:
A pneumatic control system is described including a plurality of annunciators in which movable shuttle elements indicate normal and abnormal conditions. In the event an abnormal condition is sensed causing the shuttle element in any of the annunciators to move to the abnormal position, a bias pressure is applied to brake means in the annunciators to lock the position of the shuttle elements which have not moved. Thus, those of the annunciators which are not associated with an abnormal condition continue to indicate the normal condition.
REFERENCES:
patent: 3033171 (1962-05-01), Engelbrecht
patent: 3682129 (1972-08-01), Philbrick
California Controls Company
Corr Denis E.
Swisher S. Clement
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