Nippon Electric Co., Ltd.

Nec Corporation

Yonex Kabushiki Kaisha

Tomokazu Kai

Hidetoshi Nakahara

Ryuhei Fujiwara

Akio Saito

Yoshio Sato

Shigeru Otsuka

Toshihide Tsuboi

Yoshiharu Suzuki

Kazushi Hide

Tomonori Sekine

In order to provide an athletic shoe that does not get caught even when a strong effort to hold on is made when sliding sideways, and that allows for light footwork, the present invention provides an athletic shoe that has an undersurface of a midsolethat is formed with a raised portion, along a circumferential side edge thereof affixed with an outersolethat forms an outsole, and an extending portionthat extends up to a circumferential side surface of the midsole is formed at a perimeter edge of the outersole, wherein: at a portion along a little toe of the circumferential side surfaceof the midsole, a bulged portionhaving a thickness equal to or more than a thickness substantially corresponding to a thickness of the raised portionof the midsole in a shoe width direction is integrally formed so as to protrude outward, and the extending portionis formed extending from the perimeter edge of the outersoletoward a protruding surface of the bulged portionand the extending portionis formed in a large arcuate curve and is made to go round the protruding surface of the bulged portion.

Shoe

A mobile telephone unit belongs to a mobile telephone system with a mobile telephone system and a paging system which cover an identical service area, are independently operated, and are connected through an exchange. The mobile telephone unit includes a telephone set connected to a radio transmitter/receiver and an automatic pager calling circuit. The automatic pager calling circuit includes a circuit for detecting and storing that an incoming call is made for a mobile subscriber who carries a pager and is away from a vehicle, and a circuit for sending a signal representing a preset pager number to the radio transmitter/receiver. The pager number signal for the radio transmitter/receiver is automatically sent by the paging system to the pager through the exchange, thereby calling the mobile subscriber.

Mobile telephone system for automatically paging absent mobile subscriber

A single data signal is transmitted by two transmitters to two radio zones having an overlapping zone therebetween. The data signal is frequency or phase modulated and is mixed in the transmitters with RF carrier waves of equal frequency. The data signal to one of the transmitters is delayed between 5.degree. and 50.degree. with respect to the original data signal to provide a phase difference between the transmitted signals.

Radio signal transmission system including a plurality of transmitters

In a circuit arrangement of a control station in a radio communication system comprising a plurality of substations, such as a land mobile telephone system, a measuring circuit measures an intensity of electric field in an up control channel to the control station during each quiescent period of signals in the up channel to detect jamming waves. Each quiescent period preferably appears in the up control channel in response to selected control signals of a down control channel to the substations. On detection of the jamming waves, the control channel is switched to a preselected one of speech channels between the control station and substations by switching circuits to use the preselected speech channel as a new control channel.

Circuit arrangement for protecting a control channel from jamming waves

A malfunction detection system sends a test calling signal to the mobile base station receiver and receives a response signal from the mobile station transmitter. A controller in the malfunction detection system monitors the access channel for proper operation and transmits an alarm signal to the mobile station controller when a problem is detected.

Malfunction detection system for a mobile radio telephone system

There is provided a mobile transmission system wherein a plurality of radio zones, each including one radio base station, the base stations of all radio zones being controlled by a control center which controls a paging and an origination of a mobile, are arranged to form a service area, and each radio zone is provided with at least one mobile access channel and a single mobile paging channel assigned with radio frequency common to all radio zones, thus establishing speech channels for the mobiles. The frequency of the mobile access channel is made to be different for adjacent radio zones and one or more frequencies are allocated to each base station. The control center is provided with a system for controlling an origination signal of the mobile for selecting at least one channel among available channels allocated to a radio base station associated with the mobile, circuit switching system operatively connected to the origination control system, for establishing the mobile access channel, and a system for broadcasting a channel number of the established mobile access channel to all radio zones through the mobile paging channel. Each mobile is provided with a receiver for receiving the channel number of the mobile access channel, means for updating and storing the received channel number, and a system for sequentially receiving radio waves transmitted through the stored access channel and for comparing received field intensities from the radio zones with each other to select a mobile access channel adapted to send out an origination signal of the mobile.

Mobile communication system

A transmitter control system for transmitters having means for selectively switching one channel to another in the multiple channels and means for controlling the transmitter output so as to deactivate, activate and reduce the transmitter output. The system comprises comparator means for comparing a start signal from the transmitter output control means with a detected signal of the transmitter output, the output of the comparator means being adapted to selectively drive at least one of the channel switching means for switching channels and a transmitter power reduction control circuit included in the transmitter output control means upon occurrence of a detected signal of the transmitter output indicative of a failure of the transmitter.

Transmitter control system

A channel selecting system for use in a multi-channel mobile communication system. The received field strength associated with each channel is measured sequentially to select a channel in the highest field strength. Within a measurement time span for each channel, time segments in which the field strength is lower than a predetermined level is totalized. When the total reaches either a reference time length which is less than the measurement time span or expiration of the measurement time span, one channel measurement is switched to another.

Channel selecting system for use in a multi-channel mobile communication

A control signal transmission system for mobile radio communications uses a plurality of control channels extending between a plurality of mobile units and at least one control center. The control center transmits system information signals and paging signals during individually associated time frames. The mobile units transmit response signals corresponding to the paging signals by transmitting to the control centers through the control channels. At least one frame of the system provides for a transmission of responsive information signals, following each frame including the paging signals. Each of these response signals includes an identification number of the replying mobile unit.

Control signal transmission system for use in a mobile radio

A mobile telephone communication system is provided with a plurality of mobile units having a transmitter-receiver capable of being tuned to a plurality of radio channels. A plurality of base stations are provided with receivers capable of detecting carrier level drop-off and a control station is operable to command the given base station to transmit an instruction to the mobile unit commanding it to transmit its signal over a channel which is common to all of the base stations. The control station is then operable to detect an increased carrier level in a zone corresponding to a second base station, and to instruct each of the base stations to transmit a signal over the common channel commanding the mobile unit to switch channels to an idle channel corresponding to a second base station.

Growing community of inventors

Tokyo, Japan

Tomokazu Kai