公开(公告)号：US3996518A

公开(公告)日：1976-12-07

申请号：US519763

申请日：1974-10-31

申请人： William S. Halstead ,  Richard W. Burden

发明人： William S. Halstead ,  Richard W. Burden

IPC分类号： G08G1/0967 ,  H04B5/00 ,  H04H20/61 ,  H04H1/04

CPC分类号： G08G1/096716 ,  G08G1/096741 ,  G08G1/096775 ,  G08G1/096783 ,  H04B5/0018 ,  H04H20/61

摘要： A communication system for the transmission of the sound portion of motion pictures or the like in drive-in theaters directly to automobile radios by means of an induction cable buried beneath the ground in the reception area in which automobiles viewing the motion picture are to be parked. The cable is of such design that when properly positioned and combined with an amplitude-modulated radio frequency signaling means, a relatively uniform amplitude-modulated electromatic field of the desired strength and of a frequency which is within the normal reception range of car radios (i.e. the standard broadcast band) is established throughout only the area where the automobiles are parked.To limit signal reception outside the designated parking area of a drive-in theater an interfering signal is transmitted by coupling audio-modulated radio-frequency energy to nearby electric power lines of overhead type or by means of a transmission line or cable adjacent and outside the theater area. The interfering signal employs the same radio frequency as is used by the induction cable in the reception area of the theater.

摘要翻译： 用于通过在接收区域中埋入地下的感应电缆将驾驶室中的运动图像等的声音部分直接发送到汽车无线电的通信系统将停放在其中观看动态影像的汽车的接收区域中 。 该电缆具有这样的设计：当适当地定位并且与调幅射频信号装置组合时，具有所需强度和在汽车无线电的正常接收范围内的频率的相对均匀的幅度调制电场（即 标准广播频带）仅在汽车停放的区域内建立。

公开(公告)号：US4006315A

公开(公告)日：1977-02-01

申请号：US602561

申请日：1975-08-07

申请人： William S. Halstead

发明人： William S. Halstead

IPC分类号： H01P3/06 ,  H01Q1/32 ,  H04B5/00

CPC分类号： H04B5/0006 ,  H01P3/06 ,  H01Q1/3225 ,  H04B5/0018

摘要： An integrated multiple-function communication system for highway, railroads and other applications, the system comprising a wideband coaxial trunk cable with associated amplifier/repeaters for long-distance point-to-point transmission of a plurality of carrier signals combined with inductive-signaling means including frequency-converter/amplifiers each having an input physically coupled to the coaxial trunk cable and an output coupled to an inductive-signaling conductor, the latter disposed within the trunk-cable structure or electrically related thereto whereby a relatively-uniform electromagnetic field of a desired strength is established along a highway or other service zone for inductive-carrier communication with vehicles, roadside call boxes and other devices located in proximity to the cable which interconnects with a control or terminal point.

摘要翻译： 一种用于公路，铁路和其他应用的集成多功能通信系统，该系统包括宽带同轴中继电缆，其具有相关联的放大器/中继器，用于与感应信号装置组合的多个载波信号的长距离点对点传输 包括频率转换器/放大器，每个频率转换器/放大器具有物理耦合到同轴干线电缆的输入端和耦合到感应信号导体的输出端，后者设置在干线电缆结构内或与之电气相关，由此相对均匀的电磁场 沿着高速公路或其他服务区建立所需的强度，用于与车辆，路边呼叫箱和位于与控制或终点相连的电缆附近的其他设备进行感应式运营商通信。

公开(公告)号：US3975700A

公开(公告)日：1976-08-17

申请号：US428691

申请日：1973-12-27

申请人： William S. Halstead

发明人： William S. Halstead

IPC分类号： H01P3/06 ,  H01Q1/32 ,  H04B5/00 ,  H01Q13/20 ,  H01P3/02

CPC分类号： H04B5/0006 ,  H01P3/06 ,  H01Q1/3225 ,  H04B5/0018

摘要： A radio-frequency signaling cable comprising a center conductor, dielectric means disposed about the center conductor, and a conductive sheath disposed about the conductor and dielectric means. An inductive signaling conductor is spaced-apart from the sheath by second dielectric means in a fixed spaced position to establish a predetermined characteristic impedance of an inductive signaling transmission line which is formed by the inductive-signaling conductor and the sheath. An insulating jacket encapsulates all of the conductors and dielectric means.

摘要翻译： 一种射频信号电缆，包括中心导体，围绕中心导体设置的电介质装置，以及围绕导体和电介质装置设置的导电护套。 感应信号导体与第二电介质装置在固定间隔位置处与鞘隔开，以建立由感应信号导体和护套形成的感应信号传输线的预定特性阻抗。 绝缘护套封装所有导体和电介质装置。