公开(公告)号：US3778554A

公开(公告)日：1973-12-11

申请号：US3778554D

申请日：1971-05-24

Applicant: BELL TELEPHONE LABOR INC ,  BELL TELEPHONE LABOR INC

Inventor： WEINER D

IPC: H04M7/00 ,  H04Q1/28

CPC classification number: H04M7/0096

Abstract: A single three-wire-port PBX intercom trunk circuit supplies battery, ringing, and supervision through a switching network from the trunk circuit to a pair of interconnected stations. The intercom trunk circuit and line circuits of the stations are arranged to provide all essential controls for the calling and called stations. Interconnections from the intercom trunk circuit to the stations are arranged so that talking current conducted to any one station is substantially independent of the loop resistance of any other station to which the one station is connected.

Abstract translation: 单线三线端口PBX对讲中继电路通过交换网络从中继电路向一对互连站提供电池，振铃和监控。 车站的对讲中继电路和线路电路被安排为呼叫和被叫站的所有基本控制。

公开(公告)号：US4807108B1

公开(公告)日：1995-03-28

申请号：US8332987

申请日：1987-08-10

Applicant: BELL TELEPHONE LABOR INC

Inventor： BEN-ARIEH DAVID ,  FRITSCH CHARLES A ,  MANDEL KOSTIA ,  STARZINSKI ALBERT F ,  VENUGOPAL RAGHUNATH

IPC: G05B19/418 ,  G06Q10/06 ,  G05B13/02 ,  G06F15/46

CPC classification number: G06Q10/06 ,  G05B19/41865 ,  G05B2219/32019 ,  Y02P90/20 ,  Y02P90/265

公开(公告)号：US4922348B1

公开(公告)日：1994-10-11

申请号：US30958689

申请日：1989-02-10

Applicant: BELL TELEPHONE LABOR INC

Inventor： GILLON ALEXANDER C ,  REED ADAM V ,  SCANLON JOHN M

IPC: H04N1/00 ,  H04N1/21 ,  H04N1/32 ,  H04N1/333

CPC classification number: H04N1/32406 ,  H04N1/324 ,  H04N1/32443 ,  H04N1/33323 ,  H04N1/33346 ,  H04N1/33361 ,  H04N2201/3335 ,  Y10S379/902 ,  Y10S379/905

公开(公告)号：US3924208A

公开(公告)日：1975-12-02

申请号：US57227775

申请日：1975-04-28

Applicant: BELL TELEPHONE LABOR INC

Inventor： PLOURDE JAMES KEVIN

IPC: H01P1/30 ,  H01P7/10 ,  H01P7/06

CPC classification number: H01P7/10 ,  H01P1/30

Abstract: A dielectric resonator having a high effective dielectric constant, a high effective Q and a low effective temperature coefficient of dielectric constant is realized by a composite resonator comprising a first member including a paraelectric material such as, for example, TiO2 and a second member comprising either the ferroelectric material LiTaO3 or the ferroelectric material LiNbO3. Additionally resistive means applied to the ferroelectric material reduces the increased variations of the effective temperature coefficient of the resonator during rapid temperature changes. This feature is applicable to any microwave device incorporating a pyroelectric ferroelectric.

Abstract translation: 具有高有效介电常数，高有效Q和低有效温度介电常数系数的介质谐振器通过包括第一构件的复合谐振器来实现，所述复合谐振器包括第一构件，所述第一构件包括诸如TiO 2的顺电材料， 铁电材料LiTaO3或铁电材料LiNbO3。 此外，施加到铁电材料的电阻装置减少了在快速温度变化期间谐振器的有效温度系数的增加的变化。 该特征适用于并入热释电铁电体的任何微波装置。

公开(公告)号：US3924074A

公开(公告)日：1975-12-02

申请号：US59296645

申请日：1945-05-19

Applicant: BELL TELEPHONE LABOR INC

Inventor： PETERSON EUGENE

IPC: H04K1/02 ,  H04L9/00

CPC classification number: H04K1/02

Abstract: 1. In a signaling system, a source of signal waves, a source of key waves, a transmission line or channel, means to allot periodic time intervals on said line to the transmission of signal indications thereover derived from said signals, means to produce signal indications for transmission and to encipher them comprising means to produce a pair of pulses of energy separated in time, and means to vary the absolute time positions of said pulses together under the conjoint control of said signal and key waves, one or the other of said two pulses always occurring within said time interval and the other always occurring outside said time interval, and means to transmit the former pulse over said line.

Abstract translation: 在信令系统中，信号源源，关键波源，传输线或信道，意味着在所述线路上分配周期性时间间隔到由所述信号导出的信号指示的传输，意味着产生信号 用于发送和加密的指示包括产生一对在时间上分离的能量脉冲的装置，以及用于在所述信号和键波的联合控制下将所述脉冲的绝对时间位置改变在一起的装置，所述方法中的一个或所述 总是在所述时间间隔内发生两个脉冲，另一个总是在所述时间间隔之外发生，以及用于在所述线路上传输之前的脉冲的装置。

公开(公告)号：US3922619A

公开(公告)日：1975-11-25

申请号：US43715574

申请日：1974-01-28

Applicant: BELL TELEPHONE LABOR INC

Inventor： THOMPSON JOHN STEWART

IPC: H03M3/04 ,  H03K13/22

CPC classification number: H03M3/042

Abstract: An adaptive n-bit DPCM encoder includes a standard delta modulator (DM) and n-bit counter to count the output pulses from the DM in forming a DPCM code word. A register stores a digital representation of the current step size which is updated after 2n input sample periods. Because the step sizes are constrained to be proportional to integer powers of 2 and because both the stepsize representation and the contents of the n-bit counter are transmitted together, it is always possible to linearize the DPCM code, e.g., prior to digital filtering, by merely shifting a number of bit positions indicated by the step size. A complementary transition is performed by a disclosed decoder.

Abstract translation: 自适应n位DPCM编码器包括标准增量调制器（DM）和n位计数器，以在形成DPCM码字时对来自DM的输出脉冲进行计数。 寄存器存储在2n个输入采样周期之后更新的当前步长的数字表示。 因为步长被限制为与2的整数倍成比例，并且由于步长表示和n位计数器的内容都被一起发送，所以总是可以将DPCM代码线性化，例如在数字 通过仅移动由步长指示的多个位位置进行滤波。 互补转换由公开的解码器执行。

公开(公告)号：US3921138A

公开(公告)日：1975-11-18

申请号：US52357674

申请日：1974-11-14

Applicant: BELL TELEPHONE LABOR INC

Inventor： BURNS GARY JOSEPH ,  MOHLENHOFF EDWARD ARTHUR ,  PASTERNACK GERALD PHILIP ,  STRONG GARY WAYNE

IPC: G06F13/00 ,  G06F13/22 ,  G06F13/38 ,  H04L12/00 ,  H04Q5/00 ,  H04J3/04

CPC classification number: H04L12/00 ,  G06F13/22 ,  G06F13/38

Abstract: In a multipoint data communications system a multipoint switch responds to polling signals on a signaling path from a central station by extending the signaling path to a selected one of a plurality of remote terminals. Thereafter the multipoint switch blinds itself to signals on the signaling path and remains blinded until there is an absence of signals on the signaling path for a predetermined interval of time. Communications apparatus at the selected remote terminal is enabled by a single frequency tone followed by a silent interval with the single frequency tone and the silent interval being common for all remote terminals.

Abstract translation: 在多点数据通信系统中，多点交换机通过将信令路径扩展到多个远程终端中选定的一个远程终端来响应来自中心站的信令路径上的轮询信号。 此后，多点交换机本身对信令路径上的信号进行盲目，并保持盲目直到信令路径上没有信号达预定的时间间隔。 所选择的远程终端的通信装置由单个频率音调启动，随后是具有单个频率音调的静音间隔，并且所述无线间隔对所有远程终端是公共的。

公开(公告)号：US3920912A

公开(公告)日：1975-11-18

申请号：US48600374

申请日：1974-07-05

Applicant: BELL TELEPHONE LABOR INC

Inventor： ANDERSON HAROLD PETER ,  NIELSON CARL CALVIN

IPC: H04M15/04 ,  H04M15/10

CPC classification number: H04M15/04

Abstract: An arrangement for electronically recording and displaying charges for calls made from station lines of a hotel or motel PBX is disclosed which eliminates the use of the prior art banks of electromechanical message registers. An electronic memory unit is accessed when a call is made and the number of the calling station is entered into a trunk memory word. When the central office sends message charging pulses to the PBX, the trunk word is accessed and the station number is read out. The station number then addresses the memory and the message count accruing in a memory byte assigned to the station word is incremented. Thereafter, the hotel clerk by dialing a prefix code and the station line number may obtain a display of the message count or dollar charges accruing for the station.

公开(公告)号：US3920894A

公开(公告)日：1975-11-18

申请号：US45017174

申请日：1974-03-11

Applicant: BELL TELEPHONE LABOR INC

Inventor： SHIRLEY DORREL ROOSEVELT ,  STILES SR GILBERT JOHNSON

IPC: H03K3/84 ,  H04L7/00 ,  H04L25/03 ,  H04L25/48 ,  H04B1/10 ,  H03K13/32 ,  H04L9/04

CPC classification number: H04L25/03872

Abstract: A low speed, parallel word generator is developed from a series connected pseudo-random word generator that comprises a maximal length feedback shift register with a modulo-2 adder in the feedback path. More specifically, the n cells of said shift register are reconnected to form a parallel m-rail output version of the series connected word generator. The m-rail output has a pseudo-random binary sequence that is normally the same as the pseudo-random output sequence of the series word generator. The reconnecting circuitry includes a plurality of modulo-2 adders selectively connected between predetermined cells of the parallel word generator. Clock pulse signals are applied to each of the cells of the reconnected circuit at a rate that is normally 1/m times the rate at which the series word generator is clocked. A skip mode is periodically established, after a preselected number of input clock pulses, to cause the parallel word generator to skip a normal clock pulse period and alternatively to advance the parallel format, pseudo-random, binary sequence by a selected additional amount.

公开(公告)号：US3919691A

公开(公告)日：1975-11-11

申请号：US14705271

申请日：1971-05-26

Applicant: BELL TELEPHONE LABOR INC

Inventor： NOLL A MICHAEL

IPC: G06F3/00 ,  G06F3/01 ,  G06F3/033 ,  G06F3/038 ,  G06F3/02

CPC classification number: G06F3/016 ,  G06F3/033 ,  G06F3/0346 ,  G06F3/038

Abstract: Operation of a computer system is enhanced by means of a threedimensional tactile control unit interactively coupled by a software package to the computer. By means of a sticklike mechanism, which is mechanically controlled by a servomotor system and energized by computer-generated signals proportional to a stored definition of a three-dimensional object, the hand of an operator is restrained to move over the surface of the object. Hence, surfaces of a three-dimensional object, otherwise virtually impossible to display, may be ''''felt'''' by the operator.

Abstract translation: 通过将软件包交互地耦合到计算机的三维触觉控制单元来增强计算机系统的操作。 通过由伺服电动机系统机械控制并通过计算机产生的与存储的三维物体的定义成比例的信号激励的棒状机构，操作者的手被限制在物体的表面上移动。 因此，三维物体的表面，否则实际上不可能显示，可能被操作者“感觉到”。