[특허]Cellular telephone headset

Cellular telephone headset 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04M-011/00 H04M-001/00
출원번호	US-0639430 (1991-01-09)
발명자 / 주소	Regen Paul L. (Felton CA) Tseu Marv (Salinas CA)
출원인 / 주소	Plantronics, Inc. (Santa Cruz CA 02)
인용정보	피인용 횟수 : 140 인용 특허 : 0

초록 ▼

A telephone headset apparatus for use with an existing cellular telephone. The headset apparatus is modularly connectable to the existing cellular telephone system, and no electrical or mechanical modification of the existing telephone system is required. A “handset primacy”feature of the headset apparatus ensures that normal handset operation of the cellular telephone system is unaffected by the installation of the headset apparatus. In addition, the handset may remain resting in its cradle even while the headset is operated. A slave unit connects with the cellular telephone\s transceiver unit, and a headset control unit connects both the headset and handset to the slave unit. The headset control unit contains a pushbutton for selecting headset operation, as well as a volume control dial for controlling the volume of sound reproduced by the headset\s earpiece. The slave unit contains circuitry for controlling whether the handset, the headset, or both, are to be coupled to the telephone transmitting and receiving voice signal lines. The slave unit further contains circuitry for disabling the speaker-phone, if any, in the existing cellular telephone system when the headset is operational. A mounting tray inserts between the cellular telephone\s cradle and mounting pedestal, keeping the headset control unit in an accessible location. Clips on the underside of the mounting tray allow excess lengths of headset cable to be safely and neatly stored. A retaining ring on the mounting tray provides a convenient resting area for the headset when it is not is use.

대표청구항 ▼

A cellular telephone system comprising: a cellular telephone transceiver; a receive line originating from said transceiver, for carrying AC voice signals from said transceiver; a transmit line terminating at said transceiver, for carrying AC voice signals to said transceiver; a cellular telephone handset having a handset receiver and a handset microphone; a headset having a headset receiver and a headset microphone; a slave unit coupled to said receive line and said transmit line and adapted to apply a coding signal to said receive line; a headset control unit coupled to said receive line and said transmit line and responsive to said coding signal to cause said handset and said headset to be selectively coupled to said receive line and said transmit line.

이 특허를 인용한 특허 (140)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
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Cellular telephone headset 원문보기

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Cellular telephone headset 원문보기

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