Telephone speech network
    1.
    发明授权
    Telephone speech network 失效
    电话语音网络

    公开(公告)号:US4031331A

    公开(公告)日:1977-06-21

    申请号:US649557

    申请日:1976-01-15

    IPC分类号: H04M1/58

    CPC分类号: H04M1/585

    摘要: In an electronic telephone a speech network for connecting a transmitter and receiver to a line powered telephone line which utilizes a bridge configuration that is so arranged that the network will function on very low d-c line voltages, thereby enabling the set to be connected in multi-party applications with a conventional hybrid transformer set on long loop applications.

    摘要翻译: 在电子电话中,用于将发射机和接收机连接到线路供电电话线路的语音网络,该线路供电电话线路利用布置成网络将在非常低的直流线路电压上起作用的桥接配置, 传统的混合变压器在长循环应用中设置了第三方应用。

    Method and apparatus for the detection of fraudulent toll telephone calls
    3.
    发明授权
    Method and apparatus for the detection of fraudulent toll telephone calls 失效
    用于检测欺诈电话电话的方法和装置

    公开(公告)号:US4001513A

    公开(公告)日:1977-01-04

    申请号:US600649

    申请日:1975-07-31

    IPC分类号: H04M15/04 H04M15/12

    CPC分类号: H04M15/04

    摘要: Fraudulent toll telephone calls are detected by the recognition of extraneous supervisory signals which are generated in the originating office in response to a perpetrator placing such a call. The invention provides a means of detecting a second proceed-to-send signal received at the originating office and of recording in memory means the identities of the calling and called parties. Timing means for achieving the detection is connected to the automatic message accounting trunk circuit of the originating office and, upon detection, an MF receiver is also connected thereto for a predetermined interval of time.

    Equalization of chromatic pulse dispersion in optical fibres
    4.
    发明授权
    Equalization of chromatic pulse dispersion in optical fibres 失效
    光纤中色散脉冲色散的均衡

    公开(公告)号:US3988614A

    公开(公告)日:1976-10-26

    申请号:US591498

    申请日:1975-06-30

    摘要: The chromatic pulse dispersion of a light beam in an optical fibre can be equalized by dispersing the light beam into a spectrum, detecting different portions of the spectrum and producing signals related to each portion, applying different time delays to the signals and then combining the signals to provide an output. The spectrum can be divided into discrete portions having a range of wavelengths, with optical delay lines, optical filters, and multiple section photodetectors used. The spectrum can be formed on one surface of a PIN diode, having the I layer of a thickness which varies along the length, giving in effect division of the spectrum into an infinite number of portions.

    摘要翻译: 可以通过将光束分散到光谱中来平衡光纤中的光束的色散脉冲色散,检测光谱的不同部分并产生与每个部分有关的信号,对信号施加不同的时间延迟,然后组合信号 提供输出。 频谱可以分为具有波长范围的离散部分,具有光学延迟线,光学滤波器和使用的多个部分光电探测器。 光谱可以形成在PIN二极管的一个表面上,其具有沿着长度变化的厚度的I层,实际上将光谱划分成无限数量的部分。

    Method and apparatus for establishing a plurality of simultaneous
conferences in a PCM switching system
    5.
    发明授权
    Method and apparatus for establishing a plurality of simultaneous conferences in a PCM switching system 失效
    用于在PCM交换系统中建立多个同时会议的方法和装置

    公开(公告)号:US3984643A

    公开(公告)日:1976-10-05

    申请号:US571363

    申请日:1975-04-24

    IPC分类号: H04M3/56 H04Q11/04

    CPC分类号: H04Q11/04 H04M3/561 H04M3/568

    摘要: A pair of interchangeable memories is provided, one of which receives a PCM frame while simultaneously transmitting one, while the other of which, containing the previous frame, outputs the channel bits for parallel processing. Each simultaneous conference is assigned a temporary storage location in which the associated channels are accumulated to yield the total conference signal. Subsequently, each channel is subtracted from its conference total to produce the final conference signal. The final conference signals replace the unprocessed frame in the memory where, at the end of the current frame, it is interchanged with the other memory. And so on.

    摘要翻译: 提供一对可互换的存储器,其中一个可同时发送一个PCM帧,而另一个存储器包含前一帧,输出通道位用于并行处理。 每个同时的会议都被分配一个临时存储位置,其中相关联的信道被累积以产生总会议信号。 随后,从其会议总数中减去每个信道以产生最终的会议信号。 最后的会议信号取代了存储器中未处理的帧,在当前帧结束时,它与另一个存储器互换。 等等。

    Polyurethane jacketing of metal sheathed cable
    7.
    发明授权
    Polyurethane jacketing of metal sheathed cable 失效
    金属护套电缆聚氨酯护套

    公开(公告)号:US3980807A

    公开(公告)日:1976-09-14

    申请号:US559175

    申请日:1975-03-17

    IPC分类号: H01B7/18 H01B13/22

    CPC分类号: H01B7/1875 H01B13/221

    摘要: A method of jacketing an electric cable having a corrugated metal sheath, in which the sheath is cleaned, a coating of thermosetting, castable polyurethane is applied to fill the troughs in the corrugations, a fabric is wrapped onto the coated sheath and coated with the same polyurethane, and thermoplastic polyurethane is extruded onto the cable to form a jacket. The coatings of the polyurethane serve as an adhesive for bonding the jacket to the metal sheath. A cable produced by this method comprises a layer of fabric circumscribing the corrugated metal sheath and a jacket of thermoplastic polyurethane overlying the sheath, the fabric being embedded in a layer of thermosetting, castable polyurethane bonding the jacket to the sheath.

    摘要翻译: 一种将具有波纹金属护套(其中护套被清洁的电缆)的电缆护套的方法,用于填充波纹中的槽的热固性浇注聚氨酯涂层,将织物包裹在涂覆的护套上并用其涂覆 聚氨酯和热塑性聚氨酯挤出到电缆上以形成外套。 聚氨酯的涂层用作将护套粘合到金属护套上的粘合剂。 通过该方法生产的电缆包括一层围绕波纹金属护套的织物和覆盖护套的热塑性聚氨酯护套,该织物被嵌入一层热固性浇注聚氨酯中,将护套粘合到护套上​​。

    Monolithic light-emitting diode and modulator
    8.
    发明授权
    Monolithic light-emitting diode and modulator 失效
    单片发光二极管和调制器

    公开(公告)号:US3975751A

    公开(公告)日:1976-08-17

    申请号:US507454

    申请日:1974-09-19

    摘要: For a reversed bias double heterostructure diodes, particularly GaAs diodes, electroabsorption can be obtained with reverse bias and light emission can be obtained with forward bias. However bulk absorption is large at wavelengths close to the band edge, where light emission occurs. Thus light emission through a modulator at zero bias is low. By providing for the light emulsion to be at a larger wavelength than that corresponding to the band edge high modulation efficiencies can be obtained. This is achieved by suitably doping the emitter differently as compared with the modulator so that light emission occurs at wavelengths greater than that at the fundamental energy gap.

    摘要翻译: 对于反向偏置双异质结构二极管,特别是GaAs二极管,可以通过反向偏置获得电吸收,并且可以以正向偏压获得发光。 然而,在发生发光的带边缘附近的波长处,体积吸收较大。 因此,在零偏压下通过调制器的发光是低的。 通过将光乳剂设置在比对应于带边缘的波长更大的波长上,可以获得高调制效率。 这通过与调制器相比不同地适当地掺杂发射器来实现,使得发光在大于基本能隙处的波长处发生。

    Photodiode detector with selective frequency response
    9.
    发明授权
    Photodiode detector with selective frequency response 失效
    具有选择性频率响应的光电二极管检测器

    公开(公告)号:US3955082A

    公开(公告)日:1976-05-04

    申请号:US507455

    申请日:1974-09-19

    摘要: A photodiode detector comprises a substrate on which a plurality of detector sections are formed, in series. Reverse bias is applied to the separate sections, the bias more negative for each section from the input end. The absorption bandwidth for each section can vary and the bandwidth of a section can be variable.

    摘要翻译: 光电二极管检测器包括串联形成有多个检测器部分的基板。 反向偏置被施加到单独的部分,每个部分的输入端的偏置更负。 每个部分的吸收带宽可以变化,并且部分的带宽可以是可变的。

    Telephone housing having interchangeable dial face inserts
    10.
    发明授权
    Telephone housing having interchangeable dial face inserts 失效
    电话机壳具有可互换的表盘插入件

    公开(公告)号:US3955054A

    公开(公告)日:1976-05-04

    申请号:US523353

    申请日:1974-11-13

    IPC分类号: H04M1/23 H04M1/02

    CPC分类号: H04M1/23

    摘要: A telephone having an interchangeable dial face insert, the insert of transparent material having a shape which fits over an aperture in the dial face of the housing. There is a protrusion on one edge of the insert which enters a slot in the periphery of the aperture in the dial face, and a resilient clip on the periphery of the aperture in the dial face, at a position opposite the slot, the clip engaging over the edge of the insert. A further insert, having information and/or cosmetic patterns thereon, can be positioned beneath the transparent insert.

    摘要翻译: 一种具有可互换的表盘插入件的电话机,所述透明材料插入件具有适合所述壳体的表盘表面上的孔的形状。 在插入物的一个边缘上有突起,其进入刻度盘表面中的孔的周边中的狭槽,以及位于表盘的孔的周边上的弹性夹子,在与狭槽相对的位置处,夹子接合 在插入物的边缘。 在其上具有信息和/或美容图案的另一插入件可以位于透明插入件下方。