公开(公告)号：US5138327A

公开(公告)日：1992-08-11

申请号：US641373

申请日：1991-01-15

申请人： Hungkun J. Chang ,  William K. Doss ,  Michael P. Nolan ,  Dale R. Buchholz ,  Thomas A. Freeburg ,  John McKown ,  Richard E. White

发明人： Hungkun J. Chang ,  William K. Doss ,  Michael P. Nolan ,  Dale R. Buchholz ,  Thomas A. Freeburg ,  John McKown ,  Richard E. White

IPC分类号： H04B7/08 ,  H04L12/56 ,  H04W16/24 ,  H04W36/00 ,  H04W36/30 ,  H04W40/02

CPC分类号： H04B7/088 ,  H04W16/24 ,  H04W40/02

摘要： An antenna selection technique is used in an RF communincation system in which user modules (UM) communicate with at least one node. The UM's and nodes each have multiple antennae. The combination of each UM and node antenna is evaluated at the UM. Based on at least signal quality, the UM selects its antenna and the best node antenna for use. An alternate antenna is selected if a person is determined to be present in a predetermined area adjacent a UM corresponding to a predetermined RF power level.

摘要翻译： 在RF通信系统中使用天线选择技术，其中用户模块（UM）与至少一个节点通信。 UM和节点各有多个天线。 在UM处评估每个UM和节点天线的组合。 基于至少信号质量，UM选择其天线和最佳节点天线使用。 如果人被确定存在于与预定的RF功率电平相对应的UM附近的预定区域中，则选择备用天线。

公开(公告)号：US4726607A

公开(公告)日：1988-02-23

申请号：US923284

申请日：1986-10-27

申请人： Richard E. White

发明人： Richard E. White

IPC分类号： B42D17/00 ,  B43L3/00 ,  B60N3/00 ,  B60R7/08 ,  A47F5/00 ,  F16B45/00 ,  G09F19/00

CPC分类号： B43L3/008 ,  B42D17/00 ,  B60N3/005 ,  B60R7/08

摘要： A clipboard is provided with a flexible hook which allows it to be selectively positioned over a curved vehicle steering wheel. A bottom portion of the clipboard is provided with a Velcro attachment strap to securely attach the clipboard to the steering wheel. The clipboard may then be used to hold books, writing material, or the like.

摘要翻译： 剪贴板设置有柔性钩，其允许其选择性地定位在弯曲车辆方向盘上方。 剪贴板的底部设置有魔术贴附件带，以将剪贴板牢固地附接到方向盘。 然后可以使用剪贴板来容纳书本，书写材料等。

公开(公告)号：US4354248A

公开(公告)日：1982-10-12

申请号：US98093

申请日：1979-11-28

申请人： David R. L. Conger ,  Ira A. Gerson ,  Richard E. White

发明人： David R. L. Conger ,  Ira A. Gerson ,  Richard E. White

IPC分类号： H04L27/30 ,  H04Q1/457 ,  G06F15/31

CPC分类号： H04Q1/4575 ,  H04L27/30

摘要： A multifrequency tone receiver is disclosed for detecting simultaneous tone signals in a sampled digital signal. The tone receiver includes a microprogrammed sequence controller, a time-multiplexed digital filter and a signal processing microcomputer. For each sample of the digital signal, the sequence controller is programmed to time multiplex the digital filter for performing three cascaded second order filtering operations (two bandpass filter operations and one low pass filter operation) for each of six tone signals to provide corresponding energy estimates and one additioal filtering operation to provide a total energy estimate. The signal processing microcomputer processes a number of sets of the seven energy estimates and provides an indication when a multifrequency toner pair has been detected. The digital filter, when enabled by a filter start signal from the sequence controller, asynchronously performs a single multiplication-like filtering operation to implement each second-order filter, and provides a filter done signal upon completion of the filtering operation. Full-wave rectifying capability is provided during low pass filtering operations by logically complementing the digital filter input signal. Limit cycles may be suppressed in the digital filter output signal by rounding the output signal and clamping positive and negative overflows to the largest allowable positive and negative signals, respectively. The tone receiver may be advantageously utilized in a PCM communication system for detecting multifrequency tone signalling used for dialing and supervisory control. Moreover, the inventive tone reciver may be adapted to receive many different types of tone signalling simply by changing firmware therewithin.

摘要翻译： 公开了一种用于检测采样数字信号中的同时音调信号的多频音频接收机。 音调接收机包括微程序序列控制器，时分复用数字滤波器和信号处理微计算机。 对于数字信号的每个样本，序列控制器被编程为对数字滤波器进行时间复用以对六个音调信号中的每一个执行三个级联二阶滤波操作（两个带通滤波器操作和一个低通滤波器操作），以提供相应的能量估计 以及一个额外的滤波操作来提供总能量估计。 信号处理微处理器处理多个七个能量估计组，并且当检测到多频调色剂对时提供指示。 数字滤波器在通过序列控制器的滤波器起始信号使能时，异步地执行单个类似乘法的滤波操作来实现每个二阶滤波器，并且在完成滤波操作时提供滤波器完成信号。 通过逻辑互补数字滤波器输入信号，在低通滤波操作期间提供全波整流能力。 数字滤波器输出信号的限制周期可以通过对输出信号进行舍入，并将正和负的溢出分别钳位到最大允许的正和负信号。 音调接收机可以有利地用于PCM通信系统中，用于检测用于拨号和监督控制的多频音调信令。 此外，本发明的音调调谐器可以适于仅通过在其中更改固件来接收许多不同类型的音调信号。

公开(公告)号：US3639919A

公开(公告)日：1972-02-08

申请号：US3639919D

申请日：1970-09-02

申请人： RICHARD E WHITE

发明人： WHITE RICHARD E

IPC分类号： A47K3/38 ,  A47K3/14

CPC分类号： A47K3/38

摘要： A holder for a pair of bathroom shower curtains comprising a pair of flexible seal strips permanently adhered to a bathroom wall and extending downwardly from adjacent the shower curtain rod. A pair of corner blocks permit the strip to be bent and extend across the top of the tub. Each strip has a keyhole slot extending for its entire length. The outer edge of each curtain contains a cord which is pressed into the seal strip slot to make permanent waterproof connections between the outer edges of the curtains and the bathroom walls and tub. An extension provides overlapping of the inner edges of the curtains where they meet to prevent leakage between them.

摘要翻译： 一种用于一对浴室浴帘的保持器，其包括永久地粘附到浴室壁并从相邻的淋浴帘杆向下延伸的一对柔性密封条。 一对角块允许条带弯曲并延伸穿过桶的顶部。 每个条带具有延伸其整个长度的锁眼槽。 每个帘幕的外边缘包含一个被压入密封条槽中的绳索，以在窗帘的外边缘和浴室壁和桶之间进行永久防水连接。 延伸部分提供了窗帘内边缘的重叠，以防止它们之间的泄漏。