US PATENT SUBCLASS 122 / 116
.~.~ Central fire dome

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

44.1  DF  FIRE TUBE {11}
114  DF  .~ Vertical {13}
116.~.~ Central fire dome

DEFINITION

Classification: 122/116

(under subclass 114) Devices provided with a large space or dome at the lower end of the boiler, extending into the boiler, located over the firebox, with the tubes disposed around the dome.