Extensible by movement of boom or boom segment along longitudinal axis thereof:
(under subclass 223) Apparatus including a horizontally swinging boom* and wherein either (a) means are provided which permits translational movement of the boom along its longitudinal axis and relative to the boom-supporting structure, or (b) the boom consists of a plurality of interconnected segments slidably related to one another whereby the effective length of the boom may be changed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
264, for a vertically swinging extensible boom.
299+, for booms or masts which are collapsible for transport or storage.
348+, for extensible boom structure, per se.
SEE OR SEARCH CLASS
52, Static Structures (e.g., Buildings), 111+, for other extensible shaft structure combined with mechanical motive means to extend the shaft; and subclass 632 for an axially extensible shaft, per se.
