(under subclass 131) Devices comprising bed bottoms in which the supporting surface consists of the upper parts of springs or these parts and connections between them.
(1) Note. The three common types of vertical spiral springs used as supporting means in such bottoms are hour-glass, conical, and cylindrical, and subclasses 248-254 and 256-277 are confined to such springs. Other types of springs occasionally used with their framing and connections are in subclasses 247 and 255.
SEE OR SEARCH THIS CLASS, SUBCLASS:
230+, for connecting means which is a complete fabric.
239+, for connecting means which consists of rigid slats.
654.1, for springs pillows.
716+, for springs employed in spring mattresses. SEE OR SEARCH CLASS
267, Spring Devices,
80+, for a spring panel of general utility.
297, Chairs and Seats,
285+, for a resiliently supported seat back, and subclasses 452.16+ for upholstered seat components.
428, Stock Material or Miscellaneous Articles,
592, for metallic stock which is helical or has a helical component.
