US PATENT SUBCLASS 122 / 504.2
.~ Alarms or indicators


Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

504  DF  SAFETY DEVICES {4}
504.2.~ Alarms or indicators


DEFINITION

Classification: 122/504.2

(under subclass 504) Subject matter which operate an alarm or indicator should dangerous conditions arise in the boiler, usually by a thermally-operated means which is exposed to the steam when the water-level falls below a certain limit.

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504.1, for fusible controls.

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340, Communications: Electrical,

500+, for electrical automatic condition responsive indicating systems.