Telescopic aerial with friction retaining sleeves

Communications: radio wave antennas – Antennas – Rod type

Patent

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Details

343889, H01Q 110

Patent

active

041187083

ABSTRACT:
A telescopic aerial for a radio or television receiver is constructed to facilitate automatic assembly and comprises a plurality of tubular aerial elements surrounding a central stem, the elements are slidable within one another and each has an enlarged lower end, which is housed within the next outermost element, and a radially inwardly directed lip at the upper end. Between each pair of adjacent elements is a freely slidable axially split spring sleeve which frictionally engages the two tubular elements to prevent them from slipping with respect to one another. The enlarged lower ends of the tubular elements are also formed with inwardly bent tabs to limit the inward movement of the next innermost element when the aerial is collapsed.

REFERENCES:
patent: 2391202 (1945-12-01), Tellander et al.
patent: 2677973 (1954-05-01), Gosline

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