US PATENT SUBCLASS 122 / 194
.~.~ Water tube type

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

*  DD  HORIZONTAL CYLINDER {6}
193  DF  .~ Water firebox {1}
194.~.~ Water tube type

DEFINITION

Classification: 122/194

(under subclass 193) Devices having a series of water tubes either embedded in the walls of the firebox or located just inside the walls surrounding the fuel space.

SEE OR SEARCH THIS CLASS, SUBCLASS:

190, for offset subjacent fireboxes.