Battery rundown protection system for an automobile having a rad

Details Battery rundown protection system for an automobile having a rad Battery rundown protection system for an automobile having a rad

1988-09-19

1990-10-09

Safourek, Benedict V.

Telecommunications

Transmitter and receiver at same station

With a common signal processing stage

455343, 361 92, 379 67, H04B 140

Patent

active

049625438

ABSTRACT:
An automobile telephone device uses as its power source a battery for the automobile. This applies to an automobile telephone device with an automatic answering or receiving function. In the automobile telephone device, a voltage monitoring unit monitors the voltage of the battery. When the voltage falls near a limit voltage required for starting the automobile engine, the monitoring unit electrically interrupts a power source line connecting the battery and the telephone device via a proper switch circuit to thereby inhibit excessive consumption of the automobile battery by the automatic answering or receiving function during engine stoppage.

REFERENCES:
patent: 4218717 (1980-08-01), Shuster
patent: 4493001 (1985-01-01), Sheldrake
patent: 4521918 (1985-06-01), Challen
patent: 4631496 (1986-12-01), Borras et al.
patent: 4803717 (1989-02-01), Marui

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