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1. 发明授权

US07436957B1 Audio cassette emulator with cryptographic media distribution control 有权
标题翻译：具有加密介质分配控制的音频盒式磁带仿真器
公开(公告)号：US07436957B1
公开(公告)日：2008-10-14
申请号：US09363413
申请日：1999-07-29
申请人： Addison M. Fischer , Robert L. Protheroe
发明人： Addison M. Fischer , Robert L. Protheroe
IPC分类号： H04M3/16 , H04M1/70 , H04K1/00 , H04L9/00 , H04L9/30 , G06F7/04 , G06F12/14 , H04N7/16
CPC分类号： G11B23/049 , G06F12/1408 , G06F21/10 , G11B20/00086 , G11B20/00188 , G11B20/00195 , G11B20/0021 , G11B20/00246 , G11B20/00695 , H04N21/4143 , H04N21/4627
摘要： A device of the same general physical size and shape as a standard audio cassette tape, but which accepts digital information from any of a variety of sources—including for example: Internet transmission, a digital computer, or memory cards (especially digital memory cards)—and plays this digital information through any, for example, standard audio tape cassette player. The device operates by converting the digital representation of the sound into magnetic signals which are presented to the read/write head of the cassette player equipment. The device allows the user of the cassette player to regulate the audio playback using conventional equipment controls such as: START, STOP, REWIND, FAST REWIND, FORWARD, FAST FORWARD, etc. The device has the same general physical dimensions of a standard audio cassette; at least one digital processor; and a slot into which electronic media such as, for example, memory cards, smart cards having a processor and a memory embodied thereon and other memory media may be inserted. Numerous sensors detect changes in at least one of the tape equipment mechanisms in the audio cassette emulator. Various cryptographic techniques are described for protecting the unauthorized distribution of audio information.
摘要翻译：具有与标准音频盒式磁带相同的一般物理尺寸和形状的装置，但是它接受来自各种来源的数字信息，包括例如：因特网传输，数字计算机或存储卡（尤其是数字存储卡）并且通过任何例如标准的音频磁带录像机播放该数字信息。该装置通过将声音的数字表示转换成呈现给盒式录音机设备的读/写头的磁信号来操作。该设备允许盒式磁带播放器的用户使用常规设备控制来调节音频播放，例如：START，STOP，REWIND，FAST REWIND，FORWARD，FAST FORWARD等。该设备具有与标准音频盒相同的通用物理尺寸 ; 至少一个数字处理器; 以及插槽，其中可以插入电子介质，例如存储卡，具有处理器的智能卡和其上体现的存储器和其他存储介质。许多传感器检测音频盒式磁带仿真器中至少一个磁带设备机构的变化。描述了用于保护音频信息的未授权分配的各种加密技术。

2. 发明授权

US5444772A Telephone line lockout device 失效
标题翻译：电话线锁定装置
公开(公告)号：US5444772A
公开(公告)日：1995-08-22
申请号：US241341
申请日：1994-05-11
申请人： Elzie L. Coker
发明人： Elzie L. Coker
IPC分类号： H04M1/70 , H04M9/02 , H04M1/00 , H04M3/00 , H04M13/00
CPC分类号： H04M9/02 , H04M1/70
摘要： A telephone extension controller for permitting controlled access of telephone line from one of a given number of extension telephones coupled thereto when each extension telephone is controlled with the same comprising a lock-out circuit adapted to be coupled to a ring wire or a tip wire, the lock-out circuit further adapted for allowing a selected extension telephone of a plurality of extension telephones coupled to a telephone line to control and prevent the other extension telephones from accessing the telephone line when its switch hook is raised, the lock-out circuit including an optoisolator photo-coupled Darlington transistor having a conducting section and a photo-activated section and a Zener diode coupled in series with the conducting section of the Darlington transistor and coupled in parallel with the photo-activated section of the Darlington transistor.
摘要翻译：一种电话分机控制器，用于当每个分机电话被控制时，允许电话线路从给定数目的分机电话中的一个接受电话线路的控制，该电话分机控制器包括适于耦合到环形线或尖端线缆的锁定电路，所述锁定电路还适于允许耦合到电话线的多个分机的所选择的分机电话在其开关挂钩升高时控制和防止其它分机电话接入电话线，所述锁定电路包括具有导通部分和光激活部分的光隔离器光耦合达林顿晶体管和与达林顿晶体管的导电部分串联耦合并且与达林顿晶体管的光激活部分并联耦合的齐纳二极管。

3. 发明授权

US4645877A Interface for connecting standard telephones to party lines 失效
标题翻译：将标准电话连接到派对线路的接口
公开(公告)号：US4645877A
公开(公告)日：1987-02-24
申请号：US834810
申请日：1986-02-28
申请人： Leonard E. Curtin
发明人： Leonard E. Curtin
IPC分类号： H04Q5/02 , H04M1/70 , H04M3/16
CPC分类号： H04Q5/02
摘要： A party line interface for permitting the connection of a standard telephone to a telephone central office which rings selected subscribers by applying a DC ringing potential of a selected polarity to a selected one of the tip and ring lines of the party line and a ringing tone is disclosed. The interface includes a signal path having two lines with each line having an input terminal and an output terminal. The input terminals are respectively adapted to be connected to the ring and tip lines of the party line. A programmable switching means is coupled to the signal path for selectively applying the ringing signal received by the party line interface to the output terminals for application to the ringing mechanism within the standard telephone as a function of the polarity of the DC component and ground reference applied to the input terminals by the telephone company central office. The ringing signal is applied to the standard telephone by the interface only when a chosen one of the two possible DC polarities provided by the party line central office is applied to a chosen one of the pair of lines of the signal path.
摘要翻译：用于允许标准电话连接到电话中心局的派对线路接口，该电话中心局通过将所选极性的DC振铃电位施加到所述派对线路的尖端和环线中的所选择的一个和振铃音来振铃所选择的用户，披露接口包括具有两条线的信号路径，每行具有输入端和输出端。输入端子分别适于连接到方线的环线和尖端线。可编程切换装置耦合到信号路径，用于根据DC分量的极性和应用的地面参考来选择性地将由方线路接口接收到的振铃信号施加到输出端，以应用于标准电话机内的振铃机构由电话公司中心办公室输入终端。只有当由方线路中心局提供的两个可能的DC极性中选择的一个被施加到所述信号路径的所述一对线路中时，该接口才将该振铃信号施加到标准电话。

4. 发明授权

US4636853A Dynamic audio scrambling system 失效
标题翻译：动态音频加扰系统
公开(公告)号：US4636853A
公开(公告)日：1987-01-13
申请号：US564973
申请日：1983-12-21
申请人： Ronald L. Forbes , John A. Lund
发明人： Ronald L. Forbes , John A. Lund
IPC分类号： H04N7/167 , H04M1/70
CPC分类号： H04N7/167
摘要： A multi-mode audio scrambling system includes an all-pass filter and a 90 degree phase shift circuit for supplying balanced modulators with 90 degree phase displaced audio information and 90 degree phase displaced carriers derived from the horizontal line frequency of a television receiver for producing a single sideband, suppressed carrier audio spectrum. A plurality of offset frequencies are derived from the horizontal line frequency and are used to further modulate the resultant signal to produce a single sideband displaced audio spectrum. A logic circuit selects the offset frequency (mode) in response to vertical interval signals, video inversion signals and audio tone or data signals. The final output is thus scrambled in different modes with different offset frequencies. A complementary unscrambling system is also described.
摘要翻译：多模式音频加扰系统包括全通滤波器和90度相移电路，用于向具有90度相位偏移音频信息的平衡调制器和从电视接收机的水平线频率导出的90度相移位移载波提供用于产生单边带，抑制载波音频。从水平线频率导出多个偏移频率，并且用于进一步调制所得到的信号以产生单个边带位移音频频谱。逻辑电路响应于垂直间隔信号，视频反转信号和音频音调或数据信号来选择偏移频率（模式）。因此，最终输出在具有不同偏移频率的不同模式下被加扰。还描述了一种互补的解扰系统。

5. 发明授权

US4355401A Radio transmitter/receiver for digital and analog communications system 失效
标题翻译：数字和模拟通信系统的无线电发射机/接收机
公开(公告)号：US4355401A
公开(公告)日：1982-10-19
申请号：US191154
申请日：1980-09-26
申请人： Masao Ikoma , Noboru Saegusa , Yoshihiko Akaiwa , Ichirou Takase
发明人： Masao Ikoma , Noboru Saegusa , Yoshihiko Akaiwa , Ichirou Takase
IPC分类号： H04B1/40 , H04B1/16 , H04L27/00 , H04L27/14 , H04L27/20 , H04L27/227 , H04M1/70
CPC分类号： H04L27/2275 , H04L27/0008 , H04L27/14 , H04L27/2035
摘要： According to the present invention, a radio apparatus has a section for receiving an analog signal and a digital angle-modulated carrier wave signal. The analog signal and digital angle-modulated carrier wave output of the receiver section are demodulated to provide first and second demodulated signals. A clock signal is regenerated from the output of either the demodulating means or receiver section. A control signal selectively operates a switch for passing either the first or the second demodulated signals. The regenerated clock signal controls the switch.
摘要翻译：根据本发明，无线电设备具有用于接收模拟信号和数字角度调制载波信号的部分。对接收机部分的模拟信号和数字角度调制载波输出进行解调，以提供第一和第二解调信号。时钟信号从解调装置或接收机部分的输出再生。控制信号选择性地操作用于通过第一或第二解调信号的开关。再生的时钟信号控制开关。

6. 发明授权

US4081624A Key telephone intercom line system 失效
标题翻译：主要电话互通线系统
公开(公告)号：US4081624A
公开(公告)日：1978-03-28
申请号：US725340
申请日：1976-09-21
申请人： Stephen E. Kerman , Fumio Tsutsumi
发明人： Stephen E. Kerman , Fumio Tsutsumi
IPC分类号： H04M1/70 , H04M9/00 , H04Q3/58 , H04M1/72
CPC分类号： H04M9/002
摘要： The disclosure relates to a key telephone system intercom line circuit which uses only three leads to connect plural telephones and an intercom line control circuit. These leads comprise two talking circuit leads and one control lead. Exclusion circuits in each of the telephones are controlled by signals applied on the single control lead (1) to allow a telephone to seize the intercom line circuit when it is in an idle state, (2) to allow a called telephone (signalled via a separate pair of calling leads) to answer without being excluded and (3) to exclude all other telephones from the intercom line circuit after the calling telephone has seized the intercom line circuit. Indicators in each telephone associated with particular intercom line circuits provide a visual signal at each telephone set concerning the status of the intercom line circuit by (1) not being lit when the intercom line circuit is in an idle state (2) flashing periodically when the intercom line circuit is in the seized state and (3) being continuously lit when the intercom line is in a talking state.

7. 发明授权

US3941943A Privacy circuit for key telephone systems 失效
标题翻译：关键电话系统的隐私电路
公开(公告)号：US3941943A
公开(公告)日：1976-03-02
申请号：US495580
申请日：1974-08-08
申请人： Coy Edwin Matheny
发明人： Coy Edwin Matheny
IPC分类号： H04M9/00 , H04M1/70
CPC分类号： H04M9/002
摘要： In key telephone systems where a plurality of stations have access to a line by merely depressing a line key, a circuit is provided to prevent that station from entering a busy line. The circuit uses a single relay per station to provide a normal condition of privacy for any line at a station to equipped. The circuit senses the condition of the line and on a busy condition, the station cannot access the busy line. By providing all stations of a key group with privacy circuits, all stations can have complete privacy on line calls. Privacy control is possible on less than all stations of a system and less than all lines by selective deployment of privacy circuits. Optionally, a privacy release button can be provided to allow a station to enable other stations to access that busy line. Protection has been built into the circuit against transient surges and the like.
摘要翻译：在多个站通过仅按下一行线路键访问线路的关键电话系统中，提供电路以防止该站进入忙线。该电路使用每个站的单个继电器来为车站的任何线路提供正常的隐私条件。电路检测线路的状况，在忙碌状态下，电台无法访问忙线路。通过为密钥组的所有站点提供隐私电路，所有站点可以在线呼叫上具有完整的隐私。通过选择性部署隐私电路，可以在系统的所有电台和所有线路上进行隐私控制。可选地，可以提供隐私释放按钮以允许站使其他站能够访问该忙线。电路中已经建立了防止瞬态浪涌等的保护。

8. 发明授权

US3860763A Automatic exclusion circuit for a key telephone set 失效
标题翻译：电话机自动排除电路
公开(公告)号：US3860763A
公开(公告)日：1975-01-14
申请号：US34831373
申请日：1973-04-05
申请人： NITSUKO LTD
发明人： SUDOH KENGO , ICHIKAWA MIKIHIRO
IPC分类号： H04M1/70 , G11B15/02 , H04M9/00 , H04Q3/58
CPC分类号： H04M9/002
摘要： An exclusion circuit for a key telephone set is disclosed, comprised of means for preventing a key telephone set from being connected to either an intercom line circuit or a central office line circuit which is being used by at least one other key telephone. Means are also provided to permit a user of either an intercom or central office line, to temporarily remove the guarded condition, permitting other key telephone sets to connect to the line circuit in use. After the connection of the additional key telephone set or sets, the guarded condition is restored, thereby preventing other unwanted key telephone sets from connecting to the occupied line circuit.
摘要翻译：公开了一种用于密钥电话机的排除电路，其包括用于防止密钥电话机连接到由至少一个其他密钥电话使用的对讲线路电路或中心局线路电路的装置。还提供了允许对讲机或中心局线路的用户临时消除防护状态的装置，允许其他密钥电话机连接到使用中的线路电路。在附加密钥电话机的连接之后，保护状态被恢复，从而防止其他不需要的密钥电话机连接到被占用的线路电路。

9. 发明授权

US3691308A Multiline selective signaling system 失效
标题翻译：多选择信令系统
公开(公告)号：US3691308A
公开(公告)日：1972-09-12
申请号：US3691308D
申请日：1970-11-27
申请人： BELL TELEPHONE LABOR INC
发明人： ANGNER RONALD JOSEPH , KOSCINSKI ANTHONY
IPC分类号： H04Q3/62 , H04Q5/00 , H04M1/70 , H04M13/00
CPC分类号： H04Q3/625 , H04Q5/00
摘要： A multiline selective signaling system is arranged to generate privacy lockout tones when a first station on any line goes offhook. The first such station off-hook is designated a controlling station and circuitry at each station or common to a group of stations responds to the lockout tones by removing signaling and communicating capability from all but the controlling station. On interline calls single station control of the system is maintained by an interline control circuit which is arranged to inhibit the first station going off-hook in a called line from also becoming a controlling station. On interline override calls dialing capability is removed from the interference with previously established called line connections.

10. 发明授权

US3632890A Emergency telephone system 失效
标题翻译：紧急电话系统
公开(公告)号：US3632890A
公开(公告)日：1972-01-04
申请号：US3632890D
申请日：1969-08-28
申请人： PHILIPS CORP
发明人： HUGENHOLTZ EDUARD HERMAN
IPC分类号： G08B25/01 , H04Q5/22 , H04M1/70
CPC分类号： H04Q5/22 , G08B25/014
摘要： This invention is directed to a communication system of the wired type and is especially suitable for use in emergency situations such as arise in the case of fire, or violence eruptions in cities. The system is adaptable for use with existing fire alarm loop-call systems as the substations of the system may readily replace the standard fire callboxes, i.e., they may be connected in series in existing fire callbox loops with many advantages being provided.
摘要翻译：本发明涉及一种有线式通信系统，特别适用于诸如在火灾中出现的紧急情况或城市暴力爆发的情况。该系统适用于现有的火灾报警循环呼叫系统，因为系统的变电站可以容易地替换标准的火灾呼叫箱，即它们可以串联连接在现有的火灾呼叫回路中，具有许多优点。

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