.~ Of or by means sensing or controlling work movement, quantity or position
(under subclass 36) Apparatus in which the control is (1) of a means moving work into, within, or discharging it from, a zone in which it is heated or cooled or (2) by a means sensing quantity, position or movement of the work.
SEE OR SEARCH THIS CLASS, SUBCLASS:
33, for a heating apparatus in which an article or template follower positions a heat applicator relative to the article.
34, for a heating apparatus having an operating or controlling device responding to the presence or absence of a discrete work unit or removable unit holder.
SEE OR SEARCH CLASS
34, Drying and Gas or Vapor Contact With Solids,
525, for a heater controlled by the tension or breaking or web or strand in a drying apparatus and subclass 560 for the automatic control of the rate of treated material motion in a dryer.
122, Liquid Heaters and Vaporizers,
447, for cut off of fuel to a water heater responsive to the quantity of water in the heater and subclass 451.1 for the automatic control of a boiler feeder.