Extendable antenna mast with independent retracting and lifting

Details Extendable antenna mast with independent retracting and lifting Extendable antenna mast with independent retracting and lifting

1986-05-12

1988-11-15

Sikes, William L.

Communications: radio wave antennas

Antennas

With support for antenna, reflector or director

343889, 343901, 343905, H01Q 110

Patent

active

047853093

ABSTRACT:
A vertically extendible and retractable mast for supporting an antenna and coaxial cable connected thereto to receive and/or broadcast information and is particularly adapted for use by seismograph exploration crews for receiving data from portable transmitter units which may be located at substantial distances from the receiver with the mast being adapted for mounting stationarily or on a mobile vehicle. The mast and antenna is a multiple stage antenna with simultaneous movement of the sections of the mast with the coaxial cable being fed at the same rate that the upper end of the antenna mast moves with the specific arrangement of the extension or lifting cables, retracting cables, winch and coaxial cable producing a novel and unique extendible and retractable antenna mast.

REFERENCES:
patent: 133017 (1872-11-01), Davis
patent: 2384279 (1945-09-01), Calhoun
patent: 2675211 (1954-04-01), Regoord
patent: 2795303 (1957-06-01), Muelhause
patent: 3248831 (1966-05-01), Jones
patent: 3500429 (1970-03-01), Majkrzak et al.
patent: 3638806 (1972-02-01), Hippach
patent: 4151534 (1979-04-01), Bond
patent: 4176360 (1979-11-01), Leavy et al.
patent: 4568808 (1986-02-01), Thuvies et al.

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