Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1977-01-28
1978-03-28
Safourek, Benedict V.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
325354, 325178, 343702, 343894, H04B 102
Patent
active
040817504
ABSTRACT:
An antenna coupling adapter device is disclosed of a type designed to connect an antenna to the output antenna jack of portable radio transmitter-receivers such as Citizens Band units. The adapter is comprised of a first coupling mating with the antenna output jack provided on the transmitter unit, a second coupling adapted to mate with the antenna coupling and the adapter also including a switch and a dummy resistive load comprised of an indicator lamp. The antenna coupling, when installed, actuates an operating plunger to operate the switch by seating and unseating of the antenna coupling to cause the switch to electrically connect either the antenna or the indicator lamp, respectively, to the transmitter output stage via the first coupling means so as to cause the indicator lamp to be automatically switched in as a dummy resistive load. This prevents accidental operation of the radio transmitter with the antenna disconnected to preclude an overload condition, while the indicator lamp makes the operator aware of the disconnected antenna upon making an attempted transmission, and also allows a modulation function check.
REFERENCES:
patent: 1884655 (1934-10-01), Gebhard
patent: 2081711 (1937-05-01), Polin
patent: 2214685 (1940-09-01), Stone, Jr.
Herr Ronald P.
Maurin Kenneth W.
Chin Tommy P.
Ken-Herr & Associates
Safourek Benedict V.
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