(under subclass 424.5) Dispensers in which flow from the supply to the trapping chamber is (1) of the barometric control type, i.e., the vent to the supply is closed by material accumulated in the trapping chamber, or (2) is of the type where solid material in the trapping chamber builds up to its angle of repose and stops flow from the supply.
SEE OR SEARCH THIS CLASS, SUBCLASS:
353, for movable trap chambers of this type.
437, for trap chambers of this type having cutoffs and means to vary the volume delivered to the trap chambers.
476, and following subclasses, for flow controllers which do not close outlet but cause solid material to build up to its angle of repose and stop flow from the supply, there being no trap.
479, for dispensing having plural coterminous openings (usually tubular spouts), many of which are disclosed for operation on a barometric principle when used to deliver to an unclaimed receptacle.
585+, for a barometric dispensing inkwell; and see the search notes thereto. SEE OR SEARCH CLASS
119, Animal Husbandry, for barometric watering devices.
137, Fluid Handling,
261, and 453+ for barometric type fluid handling systems.
184, Lubrication,
84, for barometric lubricators.
261, Gas and Liquid Contact Apparatus,
73, for barometric liquid supply means for such apparatus.
401, Coating Implements With Material Supply,
120, for the combination of a container having a reservoir of coating material, a material trap chamber to which flow from the reservoir is controlled by atmospheric pressure, and a hand-manipulable applicator separable from the container for use independently thereof.
