US PATENT SUBCLASS 122 / 297
.~.~.~.~ Transverse drum

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

235.11  DF  WATER TUBE {52}
*  DD  .~ Rearwardly declined {3}
*  DD  .~.~ Over bridge wall {1}
290  DF  .~.~.~ Front and rear header {4}
297.~.~.~.~ Transverse drum

DEFINITION

Classification: 122/297

(under subclass 290) Devices in which the front and rear headers are in communication, either directly or indirectly, with one or more transverse drums.

SEE OR SEARCH THIS CLASS, SUBCLASS:

277, for devices in which the water tubes are in the form of loops extending over the bridge wall.

331, for other heater tube boilers having transverse horizontal drums.

478, for super heaters having transverse drums.