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    • 2. 发明授权
    • Signalling system
    • 信令系统
    • US3922486A
    • 1975-11-25
    • US45753874
    • 1974-04-03
    • INT STANDARD ELECTRIC CORP
    • DEJEAN JACQUES HENRI
    • H04L7/00H04L12/50G08C15/12
    • H04L7/0008H04L12/50
    • There is disclosed herein a signalling system between two units for a data transmission system which transmits digital data messages character by character between these two units. The signalling system includes a transmitter-receiver disposed in each of the two units having a control output for controlling the data transfer registers of the corresponding one of the two units. These transmitters-receivers are connected by two wires. The first wire permits transmission of clock pulses for synchronization and the second wire permits the transmission of signalling by means of the presence or absence of a current at predetermined bit times of the data characters.
    • 这里公开了用于数据传输系统的两个单元之间的信令系统,其在这两个单元之间逐个发送数字数据消息。 信令系统包括设置在两个单元中的每个单元中的发送器 - 接收器,其具有用于控制两个单元中相应一个单元的数据传送寄存器的控制输出。 这些发射机 - 接收机通过两根电线连接。 第一条线允许传输用于同步的时钟脉冲,并且第二线允许通过在数据字符的预定位时间存在或不存在电流来发送信令。
    • 6. 发明授权
    • Hollow conductor power cable
    • 中空导体电力电缆
    • US3909501A
    • 1975-09-30
    • US46862874
    • 1974-05-09
    • INT STANDARD ELECTRIC CORP
    • JOHNSEN JOHN NORMANN
    • H01B5/10H01B7/29H01B7/42H01B9/06H02G15/20H01B7/34
    • H01B7/29H01B5/10H01B7/428H01B9/0611
    • The conductor cross-section of hollow power cable is changed in accordance with varying heat conductivity conditions along the line. The hollow inner section is decreased in diameter by adding conducting material to provide increased internal heat conductivity in areas of low external heat conductivity. The outer diameter remains constant. One variation uses a smaller diameter helical conductor to support added outer wire conductors. Another type uses an inner perforated pipe of different diameters and added layers of profiled wire conductors. The transition is graded to avoid sudden changes. The hollow inner duct may be filled with a coolant such as oil.
    • 中空电力电缆的导体横截面根据线路上不同的导热条件而改变。 通过添加导电材料,中空内部部分的直径减小,以在外部热导率低的区域提供增加的内部导热性。 外径保持恒定。 一个变型使用较小直径的螺旋导体来支撑外加的导线导体。 另一种类型使用不同直径的内穿孔管,并增加成型线导体的层。 过渡阶段是为了避免突然变化。 中空的内部管道可以填充有诸如油的冷却剂。
    • 9. 发明授权
    • Elevation measuring device for phase-interferometer aircraft landing system
    • 相干干涉仪飞机着陆系统的高程测量装置
    • US3900877A
    • 1975-08-19
    • US37925173
    • 1973-07-16
    • INT STANDARD ELECTRIC CORP
    • KOHLER KARL
    • G01S1/30G01S1/44
    • G01S1/30G01S1/44
    • An elevation measuring device for an air navigation system which includes a ground beacon using a commutated array transmitting successively from one radiator element at a time. One element of said array acts as a commutating cycle beginning marker and as a phase and amplitude reference. The airborne receiver imposes a programmed amplitude and phase modulation on successive sets of received pulses to simulate a scanning beam and effects a comparison of measured absolute values from pulse set to pulse set to produce elevation angle information. The first such set represents a first fraction (first half for example) of the array elements and the second set represents the remaining array elements.
    • 一种用于空中导航系统的仰角测量装置,其包括使用从一个辐射体元件连续传送的换向阵列的地面信标。 所述阵列的一个元件用作换向循环开始标记和作为相位和幅度参考。 机载接收机对连续的接收脉冲组施加编程的幅度和相位调制,以模拟扫描光束,并实现从脉冲设置到脉冲设置的测量绝对值的比较,以产生仰角信息。
    • 10. 发明授权
    • Time delay circuit for modems
    • 调制解调器的延时电路
    • US3894287A
    • 1975-07-08
    • US43624174
    • 1974-01-24
    • INT STANDARD ELECTRIC CORP
    • MATHIESEN ODD
    • H04L1/20H04L12/02H04M11/06H03K5/20
    • H04L1/20H04L12/02H04M11/06
    • This invention relates to a time delay circuit for switching on and off modems used for data transmission over cables in local telephone networks. The time delay circuit comprises a shift register controlled by a signal pattern recognition circuit, to register signals representative of being information signals, a delay counter which is controlled to initiate a predetermined delay time at the occurrence of an information signal, and gating circuits controlled by said shift register and said delay counter to switch on the modem if solely information signals have been received during the delay time required by international conventions.
    • 本发明涉及一种用于接通和关闭用于在本地电话网络中的电缆进行数据传输的调制解调器的延时电路。 时间延迟电路包括由信号模式识别电路控制的移位寄存器,用于寄存表示信息信号的信号,被控制为在信息信号发生时启动预定延迟时间的延迟计数器,以及由信号信号控制的门控电路 所述移位寄存器和所述延迟计数器在国际惯例所需的延迟时间内仅接收到信息信号时,开启调制解调器。