US PATENT SUBCLASS 122 / 204
.~.~.~ Intermediate draft

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

*  DD  HORIZONTAL CYLINDER {6}
195  DF  .~ Water tube {7}
*  DD  .~.~ Water grate {5}
204.~.~.~ Intermediate draft

DEFINITION

Classification: 122/204

(under subclass 195) Devices provided with a plurality of fireboxes having fuel grates, at least one of which is a water-cooled grate, so arranged that the products of combustion from the fireboxes meet each other.

SEE OR SEARCH THIS CLASS, SUBCLASS:

67, and 287, for analogous art.