Telecommunications – Transmitter – Mobile or portable
Patent
1987-06-11
1990-03-20
Griffin, Robert L.
Telecommunications
Transmitter
Mobile or portable
455128, 455129, 381168, H04B 1034, H04B 103, H04B 1103
Patent
active
049107950
ABSTRACT:
A microphone is provided in which two circuit boards are held in spaced parallel position by each being connected at one end to a supporting member and by each resting at the other end in a pair of stabilizing grooves located within the microphone head. A battery holding assembly has attached at one end the supporting member, and at the other end an antenna mounting surface onto which a coiled antenna is placed. A battery holding compartment is located between the supporting member and the antenna so that a battery held in the compartment acts as an addition to the antenna itself. A power and battery level indicator flashes on and off to warn that the charge of the battery is reaching a predetermined low point. The electronic circuitry for the indicator is also provided.
REFERENCES:
patent: 2840694 (1958-06-01), Morgan
patent: 3134075 (1964-05-01), Langevin
patent: 3408571 (1968-10-01), Wilson
patent: 3564416 (1971-02-01), Price
patent: 3718862 (1973-02-01), Norris
patent: 4344184 (1982-08-01), Edwards
Allied Electronics, 1980 Engineering Manual & Purchasing Guide No. 800, 8/27/79, p. 230.
"`Vagabond` Wireless Microphone System", Thomas W. Phinney, Tele-Tech & Electronic Industries, 3/54, pp. 86-88 and 152-157.
Doiron Gerald G.
McCowen Clinton R.
Griffin Robert L.
Smith Ralph E.
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