US PATENT SUBCLASS 122 / 345
.~.~ Beyond bridge wall

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

235.11  DF  WATER TUBE {52}
332  DF  .~ Vertical {10}
345.~.~ Beyond bridge wall {2}
346  DF  .~.~.~> Gas return
*  DD  .~.~.~> Longitudinal upper drum {1}

DEFINITION

Classification: 122/345

(under subclass 332) Devices in which the vertical water tubes are beyond the bridge wall and may or may not be around or over the firebox.

SEE OR SEARCH THIS CLASS, SUBCLASS:

226, for analogous art in sectional boilers.

352, for boilers with an offset firebox.