The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 11, 1989
Filed:
Mar. 21, 1988
Katsuo Suzuki, Tokyo, JP;
Kazuyuki Umebayashi, Tokyo, JP;
Aisin Seiki Kabushiki Kaisha, Aichi, JP;
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.