Telescoping mast antenna for wireless devices having rotating ma

Details Telescoping mast antenna for wireless devices having rotating ma Telescoping mast antenna for wireless devices having rotating ma

1996-05-30

1998-07-14

Urban, Edward F.

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455 90, 343702, 343901, H04B 138

Patent

active

057818673

ABSTRACT:
A telescoping antenna assembly has a tubular base for securing to a wireless telephone handset and an extendible mast telescopically mounted on the tubular base for movement between an extended position extending out of the tubular base and a retracted position in which at least the majority of the mast is retracted within the tubular base. The tubular base and mast have mating inner and outer surfaces. One of the mating surfaces has a helical groove extending along at least part of its length, and the other cylindrical surface has at least one pin slidably engaged in the groove. The engagement of the pin in the helical groove causes the mast to rotate relative to the base in a first direction as the mast is moved from the retracted to the extended position, and in a second direction as the mast is moved from the extended to the retracted position, uncoiling and then recoiling the antenna feed line so as to reduce stretching and torque on the line.

REFERENCES:
patent: 2224032 (1940-12-01), Kline
patent: 4725845 (1988-02-01), Phillips
patent: 5166695 (1992-11-01), Chan et al.
patent: 5493506 (1996-02-01), Takeyasu
patent: 5593129 (1997-01-01), Adams et al.
patent: 5628057 (1997-05-01), Phillips et al.

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