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1. 发明授权

US4103105A Switching signal generator 失效
标题翻译：切换信号发生器
公开(公告)号：US4103105A
公开(公告)日：1978-07-25
申请号：US751332
申请日：1976-12-16
申请人： Masaki Akiyama , Okie Tani
发明人： Masaki Akiyama , Okie Tani
IPC分类号： H04B1/46 , H04H1/04 , H04B1/00 , H04M1/60
CPC分类号： H04B1/46
摘要： In a press-to-talk system of radio telephone communication, the operator's particular voice signal actuates a switching signal generator to generate a transmit-receive circuit changing signal which connects the circuit of the radio telephone equipment for transmission or for standby. A characteristic tone signal is also generated for each switching changeover of the radio equipment to inform the operator of the switching changeover of the equipment. The press-to-talk manual switch and the pilot lamp for indicating the state of the circuit connection are eliminated, and the operator can use his hands and eyes for other operations while he is using his radio telephone equipment. A feature of the invention is the use of two different frequency tones to indicate equipment mode or logic status by indicating the direction of logic-state change.

2. 发明授权

US4087636A Transmit-receive circuit changing switch system 失效
标题翻译：发射 - 接收电路改变开关系统
公开(公告)号：US4087636A
公开(公告)日：1978-05-02
申请号：US688911
申请日：1976-05-21
申请人： Masaki Akiyama , Okie Tani
发明人： Masaki Akiyama , Okie Tani
IPC分类号： H04B1/46 , H04Q7/04
CPC分类号： H04B1/46
摘要： In a press-to-talk system of radio telephone communication, the operator's voice signal actuates a switching signal generator to generate a transmit-receive circuit changing signal which connects the circuit of the radio telephone equipment for transmission or for standby. The audio-frequency signal from the output of the receiver of the radio telephone equipment is properly isolated from the input to the switching signal generator.In this way, the press-to-talk manual switch is successfully eliminated and the operator can use his hands for other works while he is performing the radio telephone communication. This elimination of the press-to-talk manual switch is advantageous for a radio telephone operator when he is driving a car, working at a construction or a quarrying site, or when he is engaged in a fire extinguishing operation.
摘要翻译：在无线电话通信的一键通系统中，操作者的语音信号启动切换信号发生器，以产生连接无线电话设备的电路进行传输或待机的发射 - 接收电路改变信号。来自无线电话设备的接收机的输出的音频信号与切换信号发生器的输入端正确隔离。

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