US PATENT SUBCLASS 122 / 81
.~.~ Subjacent transverse fire tube

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

44.1  DF  FIRE TUBE {11}
51  DF  .~ Horizontal {22}
81.~.~ Subjacent transverse fire tube

DEFINITION

Classification: 122/81

(under subclass 51) Devices having a water chamber depending from the main boiler, provided with transverse fire tubes and located in rear of the bridge wall.

SEE OR SEARCH THIS CLASS, SUBCLASS:

56, 85, 86, 110, and 191, for analogous art.