US PATENT SUBCLASS 122 / 280
.~.~.~.~ Bridge wall header

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

235.11  DF  WATER TUBE {52}
275  DF  .~ Loop {3}
*  DD  .~.~ Over firebox {5}
*  DD  .~.~.~ Rear of bridge wall {1}
280.~.~.~.~ Bridge wall header

DEFINITION

Classification: 122/280

(under subclass 275) Devices having one or more headers vertically posited at the bridge wall, and in which the looped tubes extend over and in rear of the firebox or only in the rear thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

306, for similarly constructed water tube boilers provided with spur tubes.