초록 ▼

An extensible mast is shown which is erected from a portable base having a plurality of tape reels mounted thereon. The tape reels are angularly oriented on the base with respect to a common, vertical axis, and each of the tape reels is adapted to receive a resilient metal tape having longitudinal e

An extensible mast is shown which is erected from a portable base having a plurality of tape reels mounted thereon. The tape reels are angularly oriented on the base with respect to a common, vertical axis, and each of the tape reels is adapted to receive a resilient metal tape having longitudinal edges for winding and unwinding the tape. A plurality of guide rollers on the base receive the respective longitudinal edges of the metal tapes and orient the tapes whereby the tapes are fed upwardly in plane parallel to the vertical axis and at an angle to each other to form a rigid structure. A geared winding mechanism is located above the guide rollers and includes a plurality of rotatable windings which rotate about the vertical axis and wrap and wrap material about the rigid structure to reinforce the structure as it is being erected.

대표청구항 ▼

An extensible mast, comprising: a plurality of tape reels rotatably attached upon a base and angularly oriented thereon with respect to a common, vertical axis of the base, each of said tape reels receiving a resilient metal tape having serrated, longitudinal edges for winding and unwinding said tap

An extensible mast, comprising: a plurality of tape reels rotatably attached upon a base and angularly oriented thereon with respect to a common, vertical axis of the base, each of said tape reels receiving a resilient metal tape having serrated, longitudinal edges for winding and unwinding said tape; guide means located on said base receiving the respective edges of said metal tapes and for orienting said tapes with said serrated edges touching each other whereby said tapes are fed upwardly in planes parallel to said vertical axis and at an angle to each other to form a rigid structure; drive means on said base above said guide means, and in contact with said serrated edges for engaging said serrated edges of said metal tapes for driving said tapes upwardly; and winding means located on said base above said guide means and below said drive means having a reinforcing winding connected to said rigid structure for dispensing a reinforcing winding and wrapping around said rigid structure simultaneously with the upwardly movement of said tapes for strengthening said rigid structure.