(under subclass 60) Apparatus, where the signal transmitting means is an electrical circuit.
(1) Note. The line between this class and Class 340, Communications: Electrical, is that Class 169, requires that the sensor act directly upon the extinguishing systems; systems wherein the sensor acts first on an alarm and then on a fire extinguishing system are found in Class 340.
SEE OR SEARCH CLASS
340, Communication: Electrical,
577+, for electrical flame alarms; subclasses 584+ for electrical temperature alarms; and subclasses 628+ for electrical smoke alarms.
