(under subclass 151) Devices in which a portion of the insulating element extends into the opening in the wall or plate.
(1) Note. Class 174 provides for portions of a complete electrical bushing when there is no provision for the claimed subject matter in any other class (e.g., only electrical bushing structure of a spark plug, a lead-in wire of an electrical bushing as an electrode or center electrode, etc.).
SEE OR SEARCH THIS CLASS, SUBCLASS:
74+, for an insulating bushing limited by structure to use with the end structure of a conduit, cable, or conductor,
especially subclass 83 for conduit-end lining thimbles.
138, for an insulated rod joint.
154+, for tubular or spool-type insulator mounted in a supporting bracket or holder. SEE OR SEARCH CLASS
16, Miscellaneous Hardware,
2+, for a bushing or lining thimble not limited to use with electric conductors.
220, Receptacles,
3.5+, for wall, floor, or panel mounted outlet or junction boxes.
248, Supports,
27.1+, for an instrument mounted in a panel and subclasses 56+ for a pipe or cable extending through a plate.
277, Seal for a Joint or Juncture, for a generic sealing means or process,
606, for a static seal for a pipe, conduit, or cable, and a wall, subclass 919 for a seal including an electrical feature.
285, Pipe Joints or Couplings,
189+, for a pipe and plate joint.
313, Electric Lamp and Discharge Devices, 118+, for a spark plug having a bushing including a ground electrode point and an insulated electrode point.
362, Illumination,
456, for plates for mounting lenses.
403, Joints and Connections,
230+, for a rod end transverse to a side or plate.
439, Electrical Connectors,
571+, for an electrical connector mounted or attached to a wall, plate, or panel.
