US PATENT SUBCLASS 122 / 279
.~.~.~ Horizontal

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}
279.~.~.~ Horizontal

DEFINITION

Classification: 122/279

(under subclass 275) Devices in which the loops extend over the firebox, their axes being substantially horizontal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

316, for similar boilers whose tubes are of the spur type.