US PATENT SUBCLASS 169 / 23
ALARMS


Current as of: June, 1999
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169 /   HD   FIRE EXTINGUISHERS

23ALARMS


DEFINITION

Classification: 169/23

(under the class definition) Alarm or signal devices peculiarly adapted for use in connection with extinguishing systems for signaling the abnormal position of a valve or abnormal flow through the pipes.

SEE OR SEARCH CLASS

116, Signals and Indicators,

227,.

340, Communications: Electrical,

577, 599 for electric fire alarm systems which are automatically responsive to fire or temperature. See the class definition of Class 340 for the line between Classes 169 and 340.