Abstract: An apparatus assembles threaded parts in a cramped space. The apparatus grasps a nut so that an axial force may be placed on the nut while it is being threaded. The apparatus also provides a mechanism for rotating the nut in a relatively low torque fashion that permits a user to feel a cross-threaded orientation.

Abstract: In apparatus for measuring the output power an RF transmitter stage (34) connected to an antenna (44) via a quarter wavelength stripline (38), a manual probe (20) is applied connect the output of the transmitter stage to a power meter (24) and connect the output end of the stripline (38) to ground. Thus, RF signals which were passed to the antenna (44) are switched to the power meter (24). All the circuitry including the antenna (44) is mounted on a printed circuit board (60) disposed within a housing (14) which has an aperture (18) to enable the probe (20) to be inserted. By providing a suitable meter, parameters other than RF power can be measured.

Abstract: An automatic access code dialer stores a user entered telephone number and compares the first three digits of the stored telephone number to a list of three digit numbers that specify telephone exchanges that may be contacted using an alternative shorthaul long distance service provider. If the stored digits match one of the numbers on the list, the user entered telephone number and an access code for a alternative service provider are passed to the telephone network. If the stored digits do not match one of the numbers on the list, the user entered telephone number is passed to the telephone network.

Abstract: A cylindrically shaped backplane contains conductors that provide circular buses that connect corresponding contacts of connectors mounted to the backplane. When circuit cards are inserted into the connectors, the circuit cards extend radially from the cylindrical backplane.

Abstract: The invention provides an account number dialing device for a telephone station for calling a remote party by dialing an account number and a telephone number in response to a plurality of inputs received from a user. The account number dialing device includes a user interface device, a directory memory and a controller. The controller is coupled to the directory memory and the user interface device. The controller forms a number using a plurality of numbers fetched from the directory memory in response to the plurality of inputs received from the user through the user interface device and files the number. Each of the plurality of numbers is fetched from the directory memory in response to one of the plurality of inputs from the user.

Abstract: An icon positioning device with a keypad, telephone circuit, speaker and microphone is used as part of an interface system to a computer and a telephone network. The icon positioning device is used to control a position of an icon on the computer's display. The keypad on the positioning device is used to enter information into the computer and to control communication over a telephone network. In addition, the computer displays icons that are representative of the keys composing the positioning device's keypad. When one of the keys is activated, the corresponding icon on the computer's display changes appearance. Thus, the positioning device serves as a multi-featured control apparatus, as a pointing device, and as a telephone.

Abstract: A wireless LAN includes first stations adapted to operate at a 1 or a 2 Mbps data rate and second stations adapted to operate at a 1,2,5 or 8 Mbps data rate. The 1 and 2 Mbps rates use DBPSK and DQPSK modulation, respectively. The 5 and 8 Mbps rates use PPM/DQPSK modulation. All four data rates use direct sequence spread spectrum (DSSS) coding. All transmitted messages start with a preamble and header at the 1 Mbps rate. The header includes fields identifying the data rate for the data portion of the message, and a length field. For a 2 Mbps transmission the length field identifies the number of bytes in the data field. For a 5 or 8 Mbps the length field identifies the number of bytes in the data field which, if transmitted at 2 Mbps, would take the same transmission time of the data field, and is thus a fraction 2/5 or 2/8 of the actual number of the bytes. With this arrangements, all the stations are interoperable in a co-existent manner in the LAN.

Abstract: A programmable multi-function telecommunications device starts a timer when it detects a first signaling signal, such as a test signal, on a communication channel. If a second signaling signal, such as a ring signal, is detected during a predetermined time period measured by the timer, the information following the ring signal is automatically used for a maintenance function or for program memory upgrade. If the ring signal is not detected during the predetermined time period, the information following the ring signal is provided to the equipment's user interface in a conventional fashion.

Abstract: A computing interface system includes a mouse with a keypad, and a computer display that displays a group of icons that have a one-to-one correspondence to the keys composing the mouse's keypad. The icons have the same relative positioning as the keys composing the mouse's keypad. This arrangement permits the user to enter digits into the computer without repeatedly shifting his or her gaze back and forth between the keypad and display.

Abstract: An RF detector circuit (28), which may be utilized in an output power control loop (10) for an RF transmitter, includes a bridge circuit (50) including a first arm (52) containing a first diode (D2) which rectifies the RF signal and a second arm (54) which contains a second diode (D3) series-coupled to the first diode (D2), and having an RF bypass capacitor (C4). The second diode (D3) serves as a temperature compensator for the first diode (D2). The outputs of the bridge circuit (50) are connected to the inputs of a differential amplifier circuit (32) which provides a signal for use in the power control loop (10). The detector input signal is derived from the sense output of a directional coupler (22). In a second embodiment the compensating diode (D13) has its cathode coupled to the cathode of the rectifying diode (D12), and the full voltage across the rectifying diode (D12) is applied to the differential amplifier circuit (32).

Abstract: A system for transmitting information over an OFDM channel using phase shift keying encoding employs a bit mapping encoder to reduce the crest factor (ratio of peak voltage to RMS voltage). For a 16 subchannel OFDM system using QPSK encoding, a first set of four symmetrically positioned pairs of subchannels is used to encode two bits of information on each subchannel. A second set of four symmetrically positioned pairs of subchannels is used to encode only one bit of information on each subchannel, with the resultant phasor for each pair of the second set of pairs of subchannels being orthogonal to the resultant phasor for one of the pairs of the first set of subchannels. With this arrangement, the crest factor is reduced.

Abstract: Data samples describing a plurality of micro-segments that compose a symbol to be recognized are received from a device such as an electronic pad. A preprocessor maps the micro-segments into cells of an array that has several feature dimensions. The preprocessor assigns values to the cells based on the length of a micro-segment associated with the cell, and how well the features of the associated micro-segment correspond to the feature label of the cell. The cell values are used as inputs to a neural network that identifies the symbol. In one embodiment, recognizing symbols from large groups of symbols is facilitated by using a plurality of neural networks. Each neural network is trained to recognize symbols from a different subgroup of symbols, and each neural network can determine whether the symbol belongs to its subgroup.

Abstract: In digital radio communication systems such as FDMA/TDMA digital cellular mobile radio systems, in which a number of radio base stations communicate with a number of mobile radio stations, frequency hopping is used to combat fading. That requires that data bursts be routed between the transceivers (RFU1, RFU2, . . . , RFUn) and the transceiver controllers (RCC1, RCC2, . . . , RCCn) in a radio base station according to a frequency hopping algorithm. Such routing has heretofore been done by transporting the data bursts over a bus which serves as a common distribution medium between the transceivers and the transceiver controllers. In order to achieve a more fault tolerant system, instead of a bus the invention uses as a common distribution medium point-to-multipoint links (RXL1, RXL2, . . . , RXLn; TXL1, TXL2, . . .

Abstract: In a system that uses a dither signal in the production of a transmitted signal, the recoverability of an original trellis code is maintained while forming the dither signal using a modulo value that is equal to the distance between two adjacent symbols. This is accomplished by forming individual modulo counts for each of the orthogonal components produced by the transmitter's 3-tap FIR filter. The modulo counts and the bits from the trellis encoder are used to substitute the constellation subset identified by the trellis encoder with another constellation subset. The substituted subset is used for transmission and results in recovery of the original trellis code by the trellis decoder in the receiver.

Abstract: A bio-signal is monitored while a speech recognition system is trained to recognize a word or utterance. An utterance is identified for retraining when the bio-signal is above an upper threshold or below a lower threshold while the recognition system is being trained to recognize the utterance.

Abstract: The invention relates to a transmission system comprising at least a transmission device for exchanging transport modules in signals of a synchronous multiplex hierarchy which signals have a frame structure of columns and rows. The transmission device (5) comprises at least an adapter circuit (5) and a switching network (5). The adapter circuit (5) is provided to delay at least a higher-order transport module up to a given position in the adapted frame structured signal. The switching network comprises at least a time stage provided to write and identify column by column the bytes to be stored of an adapted frame structured signal and to read out the bytes identified column by column in a given order to form at least an outgoing frame structured signal.

Abstract: The power supply modules, together feeding a load (between the terminals 13 and 12) with the voltage V.sub.0, comprise blocking diodes D.sub.1 (or D.sub.2). A feedback loop controls the output voltage (controller 14 and comparator 15 which receives V.sub.ref1 (or V.sub.ref2)). Two output voltage terminals are used for locking, on the two electrodes of D.sub.1, the voltages V.sub.1 and V.sub.0 (or D.sub.2 with the voltage V.sub.2 and V.sub.0), and are connected to inputs of output voltage selection means (31) which are suitable to supply either the voltage kV.sub.0 (k.ltoreq.1) when D.sub.1 (or D.sub.2) is conductive, or the voltage kV.sub.1 =V.sub.ref1 (or kV.sub.2 =V.sub.ref2) when D.sub.1 (or D.sub.2) is blocked.

Abstract: The invention relates to a measuring device for measuring the phase deviation of at least a subordinate transport unit of a synchronous signal transmitted through a synchronous transmission system. The measuring device comprises a transmitter unit for forming the synchronous signal to be transmitted, a first desynchronizer for splitting up the synchronous signal and for detecting at least a given byte of the subordinate transport unit, a second desynchronizer for splitting up the received synchronous signal which has passed through the transmission system and for detecting at least the given byte in the received synchronous signal, and an evaluation unit for calculating the phase deviation from the moments of detection of at least the given byte in the transmitted and the received synchronous signals.

Abstract: This transmission system for transmitting data by a link comprising intermediate equipments (I.sub.1 to I.sub.N) is provided for connecting a transmitting side of a first user equipment (TE) with a receiving side of a second user equipment (TR). In the intermediate equipment situated on the receiving side, thus the most downstream equipment, there is provided a disturbance circuit (30) which disturbs bits at its output as a function of an error information signal that represents the quality of the received information signals in the intermediate equipments.

Abstract: A hierarchical network management system is described which includes concentrators (2A to 5A) on the individual levels (E1 to E3) of the hierarchy as well as adjustable interfaces in the concentrators for point-to-point and bus connections. An interface is provided for a bus connection on a master side. The interface takes delays into consideration. A transmission channel can be connected to the interface. The channel includes a forward bus and return line (a5, b5). Parallel addressable apparatus (8A, 8B, 8C) can be connected to the forward and return lines. A controllable change-over switch (A8, B8, C8), inserted in the return line (b5) of the transmission channel, is provided for each addressable apparatus (8A, 8B, 8C) of the parallel combination.