Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1976-12-27
1978-06-20
Safourek, Benedict V.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 1, H04B 140
Patent
active
040964396
ABSTRACT:
An amplified microphone assembly for increasing the intelligibility of transmitted speech and including a microphone element, an audio amplifier, an auxiliary power supply and a push-to-talk switch. The microphone element converts an audio signal to an electrical signal while the audio amplifier amplifies the electrical signal. The auxiliary power supply supplies power to the audio amplifier when the push-to-talk switch is actuated, at which time an audio signal from the amplifier is sent to a radio transceiver. The power supply is chargeable and includes a charging circuit for charging the power supply. A connecting cable connects the microphone assembly to a transceiver and includes an audio lead and two push-to-talk leads which place the transceiver in the transmit mode when the push-to-talk switch is actuated. The charging circuit is connected across the push-to-talk leads and utilizes the voltage drop therebetween, as generated in the transceiver when the leads are not connected in the receive mode to, in turn, recharge the power supply. In the first embodiment of the invention the power supply includes a rechargeable battery and in the second embodiment of the invention the power supply includes a low-leakage high-capacity capacitor.
REFERENCES:
patent: 3112445 (1963-11-01), Holden
patent: 3305638 (1967-02-01), Teachout
patent: 3394311 (1968-07-01), Pursley
patent: 3465252 (1969-09-01), McLean
patent: 3535689 (1970-10-01), Oden
patent: 3980996 (1976-09-01), Greenspan
patent: 4032844 (1977-06-01), Imazeki
Masinick Michael A.
Safourek Benedict V.
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