Abstract: A radio communication apparatus for receiving radio signals at a predetermined period when a power source switch is put in an on state and when the apparatus is in a service area of a base station. A timer circuit times a preselected time interval, substantially equal to the predetermined period, beginning at a time instant at which the switch is turned from an off state to the on state and produces a time-out signal after the preselected time interval has elapsed. Each radio signal carries a synchronization signal and an additional signal. A detecting circuit detects a timing at which a synchronizing circuit is in a synchronized state wherein a timing clock signal produced by a clock generating circuit is synchronized with the synchronization signal. The detecting circuit produces a detection signal when the detecting circuit detects the timing before reception of the time-out signal.

Abstract: A selective call receiver comprises circuitry for receiving a first signal having a first address and a first information format, and a second signal having a second address and a second information format; and a device for presenting a message comprising the first and second information formats. The information formats may comprise any of, for example, numeric, alphanumeric, and graphic displays and a voice output.

Abstract: An adaptive battery saving controller for a battery powered communication receiver utilizes a signal quality detector for detecting strong signal and weak signal conditions. During strong signal conditions, the adaptive battery saving controller is capable of suspending the supply of power to the receiver during the reception of message code words not intended for the communication receiver. The adaptive battery saving controller is also capable of suspending the supply of power to the receiver following the detection of a hard address error. During weak signal conditions, the adaptive battery saving controller reverts to conventional battery saving techniques.

Abstract: A communication system includes an input (202) for requesting and receiving a first message information format and for requesting and receiving a second message information format, and controller (210) for detecting a measure of communication activity and for comparing the measure of communication activity to a threshold that is adaptable by the controller (210) as a function of the communication activity. The communication system accepts the first message information format when the measure of communication activity is below the threshold (604, 610, 606, and 608), and accepts the second message information format when the measure of communication activity is above the threshold (604, 610, 612, 614, and 616).

Abstract: The present invention proposes a system, comprising intelligent switches (1-9), which are embedded on wall surface near entrance on each floor, possessing display unit with touch panel on the front, displaying and outputting the selection menu and the information from the display screen, an information processing unit (10) connected with each of the intelligent switches through the communication line and sending, receiving and processing the information, and the regulatory systems (35-37) in the building. The control signals of the regulatory systems (35-37) in the building are input and the information from the information processing unit (10) is output by the display plate with touch panel (6) of the intelligent switch. According to this system, it is possible to install the intelligent switch system by embedding it in the wall surface near an entrance on each floor, to offer the necessary information such as messages, news, information, etc. and to control the regulatory systems in the building.

Abstract: An improved wireless remote controller for controlling each of several devices under control in each mode of operation without requiring any switching among devices under control and thus having no device switching key mounted thereon. The wireless remote controller has a plurality of operation selection keys and is designed to operate in such manner that when the controller is directed toward one of the devices under control and any one of the operation mode selection keys is depressed, a corresponding operation mode signal is generated and transmitted to a device under control. The operation mode signal includes a series of consecutive signal components for operating all the devices under control. The device under control responds only to the associated one of the signal components of the operation mode signal.

Abstract: Remote-controlled electronic equipment with a transmitting function is disclosed which comprises a remote-control signal receiving section for receiving a remote-control signal containing a device address of a desired piece of electronic equipment to be controlled and command information on a desired instruction, and a communication section for transmitting a signal frame assembled on the basis of decoded data of the remote-control signal. Further disclosed is a remote-control signal transmitter for use in controlling the electronic equipment wherein a remote-control signal transmitted from the transmitter contains a device address of a desired piece of the electronic equipment to be controlled and command information on a desired instruction.

Abstract: A trunked communication system that supports polling requests for location information without requiring infrastructure changes. Ordinary private call talk requests are altered to include at least two inclusions of the ID code for the target communication unit. This dual representation of the ID is interpreted by the receiving unit as a poll request, to which the unit responds by providing location information on an allocated communication resource.

Abstract: A stowing system with adjacent lockers comprising a microprocessor device connected to a display device and to a key-board enabling the user to compose a personal secret code transmitted to the microprocessor device which operates the locking of the lock of the door of the selected locker, this code being stored in a storage of the microprocessor device for the whole period of occupation of the selected locker.

Abstract: An automated chemical storage and chemical feed system for a use station to chemically treat and monitor a process at a use station where the process is being run, including one or more base chemical supply tanks at the use station storing chemicals and intermittently or continuously feeding the chemicals to the process. A level sensor is provided in each base tank to determine the chemical level and to deliver a signal to a control and processing unit. Sensors may be provided on the process for providing chemical condition information to the control and processing unit.

Abstract: The electronic lock system is useful for a key safe where many different persons must have controlled, recorded access. Each user has a card key which is connected to one of a plurality of key safes to complete the system. The user inserts his personal identification number (PIN) into the card key in order to activate the card key. The card key is laid against a key safe so that an exchange of data takes place between key safe and card key to perform the security, access and control functions. The card key and key safe interact to exchange information so that the key safe may have memory of which card key is being used at which time, and vice versa. Updating of other memory functions can be accomplished. Validity is verified if a board number and a security level number in the card key relate correctly to their counterparts in the key safe and if the card identification (CID) number is not in the lock invalid CID number list. When valid, the key safe can be opened.

Abstract: An electromagnetic detection and identification system for detecting and identifying a plurality of responders (improved transponders), each containing a unique code, and simultaneously present in one and the same interrogation field generated by a transmitter/receiver.

Abstract: In a broadband signal switching network with a switching point matrix constructed in FET technology, an input driver circuit is connected for feeding a respective matrix input line, which driver circuit is blocked via an inhibit input when a prescribed signal level is reached on the respective matrix input line which guarantees a safe switch through of the switching element connected with the matrix input line, whereby a further recharging of the matrix input line is prevented.

Abstract: A system for retrieving shopping carts at a store having a plurality of shopping carts is disclosed. The system includes a counter which can be preset to a first determined count. A target is mounted to each shopping cart while a sensor detects the return of each shopping cart to a designated area. As each shopping cart is returned to the designated area, the sensor generates an output pulse which changes the count in the counter. Whenever the count in the counter achieves a second predetermined count, an alarm is activated indicative that a prize is awarded to the person returning the shopping cart to the designated area.

Abstract: A paging system comprises a predetermined number of radio paging terminals each producing a subscriber identification number, a service zone signal, and a frequency signal respectively corresponding to a subscriber number, a paging processor for allocating subscriber identification numbers received from the radio paging terminals respectively to a predetermined number of paging service zones and a predetermined number of time slots in accordance with the service zone signals and frequency signals, and a predetermined number of transmitter for radiating paging signals provided in each of the paging service zones so that at least two paging signals having different frequencies which are obtained by modulating at least two of the subscriber identification numbers are radiated in two adjacent paging service zones at one of the time slots.

Abstract: A message is generated at each of a plurality of source nodes, each message comprising at least address information identifying a first or destination node Di, and address information identifying a source node Si. The address information for the destination node is then used to route each message through the nodes of the communication network toward its destination node. At each node where two messages meet that are addressed to the same destination node, a second two messages are generated in place of the first two messages. One of these messages is routed toward the destination node while the other is routed toward an auxiliary node Ai whose address is specified in the message. If any further collisions take place between two messages routed to the same destination node, again two more messages are generated in place of the two colliding messages and one is routed toward the destination node while the other is routed toward another auxiliary node.

Abstract: A selective call controller, such as a paging terminal, and a method therefor is provided for receiving calls comprising first and second types of signal, such as numeric/alphanumeric or modem/DTMF. A determination is made of the type of signal being received, and a destination address and message signal is selected accordingly.

Abstract: A remote control system capable of controlling electrically operable equipment in a person occupiable structure and which has an essentially unlimited command format. The system comprises a signal receiving sensor such as an infrared sensor, and which can receive a signal from a remote control unit, typically a hand-held remote control unit. The infrared signal is processed to be compatible with electrically operable equipment as for example, sound entertainment system, electrical appliances or the like. A central computer or microprocessor is associated with the dwelling structure and receives a signal from the remote control unit, via the signal receiving sensor, and which computer generates a control signal for control and operation of the electrically operable equipment. The remote control system has an input means to receive the code format of each type of electrically operable equipment to thereby generate a format of encoded signals for each type of electrically operable equipment.

Abstract: A plurality of terminals on a communication network are connectable to a transmission line to communicate mutually. Each terminal includes a single device or a composite device essentially consisting of a plurality of devices. Transmissions and reception of messages to and from the plurality of terminals on the communication network is performed using an address system assigned to each terminal. The address system comprises a device address or DA assigned to the individual terminals, a sub-device address or SDA assigned to respective devices constituting each terminal and having a single or a plurality of values SDA, and a function address or FA assigned to respective functions possessed by each device and having a single or a plurality of values of FA, whereby even when a terminal to be controlled is a composite device, only a function desired to be controlled can readily be controlled and extensibility of the system can be improved to facilitate control processing in the system through communication.

Abstract: Method and arrangement for transmitting data between a central data station and a plurality of data terminal equipment in a local area network. In order to achieve fast data transmission for simultaneous data lines in a local area network between a central data station and a plurality of data terminals upon interposition of a network node, whereby the known HDLC (high level data link control) data transmission procedure is combined with a data transmission method for data transmission wherein every status change of the binary coded data has a transmission pulse alternating in operational sign allocated to it, a concentrator is utilized as the network node. This concentrator regenerates the incoming HDLC data packet and then transparently forwards them to their desination.