Abstract: A data transmission system comprising a unidirectional loop transmission path to which a plurality of communication equipment are coupled. Each communication equipment operates to relay and send a signal including a data signal received from other communication equipment located upstream to those located downstream via the transmission path. An arbitrary communication equipment which requests for the sending right adds a code indicating a priority level of the sending right to a sending right request signal and sends this code-added sending right request signal. Each communication equipment includes a circuit which delays the received signal by a predetermined time shorter than a frame time and sends the signal thus delayed.

Abstract: An electronic device having a display is disclosed which comprises contacts for electrically coupling the display to the circuitry of the electronic device, and a mounting arrangement for removable attachment of the display to the electronic device, such that the display may be removed from the electronic device to be read. The electronic device may be a radio transceiver, and the display may be adapted to display a paging message from a paging receiver associated therewith.

Abstract: Radio glasses having an electronic radio receiver integrally mounted in eyeglasses. Earphones are connected to the receiver and removably mounted to the temple of the glasses, said earphones being stored when mounted and adapted for insertion into the wearer's ears for radio use when removed from the temples. Batteries, external switches and tuning and volume controls are all integral with the temples of the glasses.

Abstract: A remotely operated control system for vending machines as a replacement for the coin-operated mechanism of such vending machines. The system includes a remote control box disposed any desired position away from the vending machine, a control center and either a connection box or control mechanism within the control center and either connection box or control mechanism assembled in the vending machine in place of the conventional coin mechanism otherwise employed. The system is supplied electrical power from a normal supply source and includes appropriate circuitry which is either wire or frequency operated. In the utilization of the system a purchaser of merchandise to be vended by the vending machine gives the purchase price to a salesperson who in turn actuates a button controlled switch in the control box effective to put the system in operation and places the vending machine in vend condition.

Abstract: A data communications system (100) that communicates messages by way of a radio frequency (RF) channel between a network control processor (NCP 102) and subscriber radios (190) located anywhere in a large geographical area that is divided into a plurality of cells or zones, each of which is covered by one or more base station radios (130-132). Base station radios (130-132) and a control station radio (140) are coupled by corresponding general communications controllers (GCCs 120-123) and modems (108-111) via links (150-152) to modems 104-107) coupled to the NCP (102). The control station radio (140) transmits a set-clock message (610) to GCCs (120-122) associated with each of the base station radios (130-132). Each GCC (120-122) is responsive to receipt of the set-clock command for updating its clock (214). Each data message (600) to be transmitted to the subscriber radios (190) may be substantially simultaneously transmitted or "simulcasted" at a pre-selected time.

Abstract: In the radio communication system for performing a communication in the idle channel selected from a plurality of frequency channels, the originating call station transmits the station identification code to specify the distant station together with the idle channel data to be actually communicated, and the distant station designated by the station identification code shifts to the designated idle channel, and the communication is executed between two stations. During communication in a certain channel between two stations, in the case where a radio interference occurs in this channel and it is intended to shift to other channel, one station transmits the other channel data in the communication channel and the other station receives it, and the communication is continued each other in the other channel.

Abstract: The access control system according to the present invention provides for the centralized control of the system operating parameters, including all times, access codes, alarms, error messages, and pass-coded indications. The access control system communicates with a plurality of remote card readers, at which point the user enters a code to gain entry into the protected areas. The access control system according to the present invention selectively stores limited information at each card reader location, wherein access control is still maintained, even if the central data system becomes inoperative. Moreover, the communication between the central data system and the plurality of card readers includes data transfers through a plurality of subsystems, each having a data processing program therein. The system according to the present invention provides for efficient communication between asynchronous operating subsystems through the controlled use of a first-in-first-out (FIFO) data register pair.

Abstract: A technique for monitoring the reactions of a person exposed to a scene to determine the locations within such scene which attract the person's attention. A portable unit is mounted on the person's head by way of, for example, a set of earphones. A directional transmitter in the portable unit is aimed in the direction of the person's line of sight. Distributed throughout the scene are receivers located at selected points. When the person looks in the direction of one of these receivers, the emitted signal is detected by one of the receivers. An electronic memory stores the detected signal to indicate which of the receivers, and therefore which scene location, was being viewed.

Abstract: A selective calling radio paging receiver includes a battery saving controller which activates the high power drain unit of the receiver at periodic intervals for allowing the detection of a preamble contained in a received digital paging signal and deactivates it for a period longer than the period of activation for power savings purposes. The power saving is disabled in response to the detection of a preamble for continued power activation to permit a sync detector and an address detector to be operated in succession. A window pulse is generated in synchronism with the clock timing of the received digital signal so that its binary level transition is time coincident with each window pulse. If noise occurs in the received signal, binary level transitions occurs which are out of coincidence with window pulses. The time-coincident binary level transitions and the noncoincident binary level transitions are counted to give first and second counts, respectively.

Abstract: FM receivers for communications at UHF frequencies often use automatic frequency control (AFS) or phase lock to precisely control a local oscillator. By causing the local oscillator to track errors and slow variations in the frequency of the received signal, these control loops suppress DC and low-frequency modulation components in the intermediate frequency signal and interfere with demodulation of low frequency information, such as digital signalling data. This invention permits recovery of the full modulation spectrum with flat frequency response. A conventional FM demodulator recovers the high frequency modulation components; the frequency control signal for the local oscillator provides the low frequency components. Combining the components with proper weighting produces recovered modulation with bandwidth limited only by the IF bandpass filter of demodulator.

Abstract: A system for detecting unintentional operation of a radio transmitter includes an antenna for receiving a r.f. signal and a detector for detecting the absence of presence of a component in the received signal that is indicative of a transmission from a radio transmitter keyed in an operating condition but not being used. In response to detection of such signal component, the detector produces a trigger signal. A delay timer times the duration of the trigger sigal and produces a delayed signal in response to the duration of the trigger signal exceeding a preset time period. An indication circuit produces an operator-alerting indication in response to receipt of the delayed signal informing the operator that the transmitter is unintentionally keyed in an "on" condition. The system also has a d.c. power source for supplying power to the detector, delay timer and indication circuit to operate the same.

Abstract: An electronic lock system adapted for use with receivers, such as parking meters, that include storage means and an electronically operable actuator for providing access to material such as coins contained within the storage means in response to an electronic actuation signal. The electronic lock system comprises an access device and an electronic lock associated with each receiver. The access device includes means for storing a plurality of access codes such that each access code is associated with a unique identification code. Each electronic lock comprises means for storing a particular identification code and a passcode, and identification code means for providing the particular identification code. The access device also includes access code means for receiving the particular identification code and for providing the associated particular access code.

Abstract: A car electronic device removably mounted in position of a car includes a pivotable handle which is used to mount the device in the car or transport outside the car. The handle may be held to a sitting position aligned with the front face of the device to show it as a continuous part of a fixed member of the device so as to not only improve the appearance of the front face of the device but also establish a psychological antitheft effect.

Abstract: A sound transmission method is carried out in a data way system comprising at least one controller, more than two data input modules and more than two data output modules all of which are connected to one another by a series of data transmission lines making a single loop while linking them together. The data input modules and output modules each are given an address. One or some of the data input modules are constructed as a sound input module or modules, while one or some of the data output modules are constructed as a sound output module or modules. The controller specifies the addresses of the sound input and output modules more frequently than those of the other data input and output modules.

Abstract: A primary object of the present invention is to provide a remote control apparatus commonly usable to various devices, made in a smaller size and yet provided with no small area of the display portion for displaying operation status of the device. The invention provides a remote control apparatus using a touch panel, which is capable of sensing coordinates of a specified point for inputting the remote control command and also as a display of various images for inputting the operating command and of operation status of the remote controlled device. The invention also provides a remote control apparatus which puts a transmitting portion, receiving portion and image display control portion thereof in an enabled state for a predetermined period of time after the touch panel is pressed thereby to reduce power consumption.

Abstract: An automatic feedback mechanism in a communications network having dynamic routing. The invention detects the failure of an element in a route that is either in the process of being created or has been created and is being used. The invention provides a means for sending information as to the failure of the element back to the node originating the communication and, if the route had been established, to the destination node as well. The information sent back is used to update the network topology data base of the receiving node for subsequent route creation decisions by that node. In this way, proliferation of status messages in a communications network is avoided.

Abstract: An RF mixer combines electrical and structural aspects to create a more efficient device. Diodes are coaxially mounted within two conductive tubes which form shields. The respective diode or diodes associated with each of the tubes are cross-connected at the LO port to the tube associated with the other diode or diodes. A capacitor compensates the inductance associated with the outer surfaces of the tubes. At their other ends, the tubes are coupled to ground and the diodes are coupled to an RF/IF bandsplitting network.

Abstract: A method and apparatus for transmitting messages from one processor to a plurality of other processors in a distributed processing system having no hardware message broadcast facilities. The transmitting processor includes a broadcast program process for controlling the transmission of any messages destined for a plurality of other processors. Different client processes in the transmitting processor request the broadcast process to transmit a broadcast message. The single broadcast process controls the number of individual messages which are sent out sequentially to each of the receiving processors in such a way as to ensure that the broadcast messages do not interfere with other message traffic that frequently has tighter delivery time requirements. The broadcast process transmits the broadcast messages to each of the plurality of recipient processors without waiting for acknowledgment response messages from any of these processors.

Abstract: A drive control device for a seat in a vehicle has a driver entry detection unit, a battery capacity detection unit, a seat drive unit, and a controlling circuit unit for generating a seat drive control signal. The controlling circuit unit has a function of deciding whether or not the capacity of the battery is lower than a predetermined reference value when an entry is detected by the entry detection unit, a function of prohibiting the driving of the seat when the decision of the battery capacity decision function is affirmative, and a function of effecting the driving of the seat when the decision of the battery capacity decision function is negative. The controlling circuit unit can provide a door opening degree monitoring function and a rear monitoring function.

Abstract: A digital subscriber line formed by terminal equipment, a network control device including a plurality of the terminal equipment, and an exchange terminal. In a waiting state of the digital subscriber line, the network control device is placed in a state which can only receive a signal. A sending portion of the network control device is driven when, at a call from the terminal equipment, the terminal control device receives a line activation signal from the exchange equipment and when, at an incoming state from the state from the exchange terminal, the terminal control device receives a line activation from the exchange equipment. The synchronization pattern signal is sent from the sending portion to the exchange terminal so that the synchronization of the exchange terminal is established.