US PATENT SUBCLASS 122 / 327
.~.~.~ Plural lower drum

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

235.11  DF  WATER TUBE {52}
324  DF  .~ Straddle {2}
*  DD  .~.~ Single upper drum {1}
327.~.~.~ Plural lower drum {3}
328  DF  .~.~.~.~> Fluid fuel
329  DF  .~.~.~.~> Cross
330  DF  .~.~.~.~> Plural firebox

DEFINITION

Classification: 122/327

(under subclass 324) Devices in which the water tubes are either in direct communication with a single upper drum and

with a plurality of lower drums or in direct communication with headers, which are in turn in communication with the drums.

SEE OR SEARCH THIS CLASS, SUBCLASS:

99, and 329, for boilers of this type having the tubes crossing each other.