Communications: radio wave antennas – Antennas – With radio cabinet
Patent
1991-07-15
1992-11-24
Wimer, Michael C.
Communications: radio wave antennas
Antennas
With radio cabinet
343901, H01Q 124
Patent
active
051666952
ABSTRACT:
An auto-extending antenna for a portable radio having a housing which can be closed is inserted into an aperture within the housing. As the housing of a radio using the auto-extending antenna is opened, a toothed wheel attached to the opening portion of the housing is rotated. This toothed wheel is coupled to a second toothed wheel and causes the second toothed wheel to rotate. The second toothed wheel is connected to a first hollow tube which has two opposing slots extending along almost the entire length of the tube. An antenna is inserted into the hollow portion of the first tube, and two opposing nobs attached to the bottom of the antenna protrude through the opposing slots. A second hollow tube fits over the first hollow tube. The inner walls of the second hollow tube have two opposing screw paths winding up its entire length. The nobs extend into the screw paths. The second tube is secured to the housing of the radio. A rotation in the wheel causes the first tube, and therefore the antenna, to rotate within the second tube. As the first hollow tube rotates, the two nobs in the screw paths force the antenna up or down, depending on the direction of the rotation.
REFERENCES:
patent: 2709220 (1955-05-01), Spector
patent: 4742360 (1988-05-01), Carolus et al.
patent: 4864322 (1989-09-01), Yamamoto et al.
patent: 4867698 (1989-09-01), Griffiths
patent: 4875053 (1989-10-01), Harada
patent: 4907007 (1990-03-01), Druecker et al.
patent: 4992799 (1991-02-01), Garay
Chan Hiang B.
Tan Her S.
Agon Juliana
Ho Tan
Motorola Inc.
Nichols Daniel K.
Wimer Michael C.
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