(under subclass 235) Devices having a vertical pipe relatively large in cross section and provided with some form of water tubes and not otherwise provided for.
SEE OR SEARCH THIS CLASS, SUBCLASS:
13+, for range or kitchen boilers, called in the art "stand boilers", which are provided with a heater.
132, 133, 184, 185, 186, 215+, and 218, for sectional stand pipe boilers.
281, 307+ and 475, for stand pipes provided with spur water tubes.
