Telephone system in a vehicle

Details Telephone system in a vehicle Telephone system in a vehicle

1988-03-21

1989-07-11

Lev, Robert

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

455 90, 358 63, H01M 123

Patent

active

048478873

ABSTRACT:
A telephone system in the vehicle comprises a detectable handset including a microphone and speakers, a pad positioned near a vehicle driver for holding the detachable handset, amplifiers for amplifying a voice signal from the microphone, a position detector for detecting a distance between the handset and the pad, and a gain controller for controlling the gain of the amplifiers in response to the distance detected by the position detector. When the handset is held on the pad, the position detector detects that the handset is positioned adjacent the pad. At this time, the gain controller increases the gain of the amplifiers, and consequently, the voice from the vehicle driver is clearly received. Therefore, a vehicle passenger especially the driver, can use the telephone system while grasping a steering wheel with both hands. When the handset is removed from the pad, the position detector detects that the hand set is positioned remote from the pad. At this time, the gain controller decreases the gain of the amplifiers, and consequently, a vehicle passenger other than the driver can use the telephone system in the same manner as a telephone system in a home.

REFERENCES:
patent: 4241236 (1980-12-01), Nash
patent: 4455454 (1984-06-01), Umebayashi
patent: 4490584 (1984-12-01), Lucey
patent: 4629828 (1986-12-01), Umebayashi
patent: 4646344 (1987-02-01), Goldhorn et al.
patent: 4669108 (1987-05-01), Deinzer
patent: 4677722 (1987-03-01), Nishida et al.
patent: 4698838 (1987-10-01), Ishikawa et al.
patent: 4723265 (1988-02-01), Kamei et al.
patent: 4736410 (1988-04-01), Nishida et al.
patent: 4741018 (1988-04-01), Potratz et al.
patent: 4747122 (1988-05-01), Bhagat et al.

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