Abstract: A wireless mobile telephone communication system for communicating with a base station is disclosed. The communication system is designed to integrate a conventional wireless telephone unit with a conventional mobile telephone unit to provide remote capabilities. Integration is achieved by an interface which is adapted to acoustically or otherwise couple a wired handset of the mobile telephone unit to a remote wireless handset through a wireless transceiver/control unit. The communication system allows the driver of a mobile telephone equipped vehicle to use a low cost wireless telephone unit to receive calls while away from the unattended vehicle using the remote wireless handset.

Abstract: A cordless telephone system constituted by a switching station connected to a cable telephone exchanger and at least one telephone set connected to the switching station via a plurality of radio channels. The switching station has a controller which scans the radio channels and selects a nonused radio channel in response to a calling signal from the telephone exchanger, a signal generator for calling a telephone set, a signal detector for detecting a response signal from the telephone set, and a transmitter. The controller changes the number of radio channels to be scanned in accordance with the frequency of use of the radio channels and the transmitter sends a signal representing a changed number of radio channels. Each telephone set has a controller for scanning the radio channels, a signal detector for detecting the calling signal and the signal representing the number of channels from the switching station, and a transmitter for sending a response signal to the switching station.

Abstract: Disclosed is an image input apparatus which comprises a liquid crystal panel disposed under an original mount and provided with a liquid crystal and a photo absorption agent sealed therein, electrodes arranged in a matrix on each of upper and lower opposite surfaces of the liquid crystal panel, and a light source disposed above the original mount so as to send light onto an original mounted on the original mount so that light from the original is projected onto the crystal panel so as to make the liquid crystal panel to store picture image information on the original as a change in phase of the liquid crystal, the picture image information stored in the liquid crystal panel being electrically read out by the electrodes. Preferably, the liquid crystal panel is further provided dichromatic coloring matters sealed therein.

Abstract: An intrinsically safe telephone as provided for use in hazardous areas. The telephone includes a single line instrument located in the hazardous area which, in turn, is coupled by a two-wire transmission path to a shunt diode barrier and a telephone line interface located in a safe environment. The telephone line interface reduces power of incoming ringing and audio signals. The telephone line interface further includes an off hook indicating circuit which senses when the single line instrument is off hook. The telephone line interface further includes a bootstrap power supply for powering the single line instrument whenever the single line instrument is off hook. The intrinsically safe telephone is line powered and requires no auxiliary power in the hazardous environment. The intrinsically safe telephone is useful in all hazardous environments as classified by the National Electrical Code and requires no explosion-proof housing.

Abstract: A master station 1 is connected with a telephone line 2. For this master station 1, a plurality of hand sets are provided. Each hand set is set to different transmitting and receiving frequencies to communicate with the master station 1. Each hand set generates from an information signal generating circuit 35, an information signal representing the operation state of the hand set and transmits the information signal by a transmitting circuit 37. The master station 1 receives the information signal through a monitor receiving circuit 4. The monitor receiving circuit 4 has a receiving frequency which changes cyclically to be tuned successively to all the transmitting frequencies of the respective hand sets. Accordingly, the monitor receiving circuit 4 receives successively the information signals from the respective hand sets. The received information signals are detected by a second detecting circuit 10 and a third detecting circuit 11 to be supplied to a control circuit 3.

Abstract: A manually-focused video camera provides a movie image for an electronic viewfinder and a still image for recording apparatus. A diaphragm in the optical section of the camera determines the optical aperture presented to incoming image light, which coincidentally establishes the depth of field in which the subject remains in focus. When the aperture necessary for a still image exceeds the aperture used for the movie image by, e.g., three aperture stops, a warning system in the camera produces a control signal. The existence of this signal indicates a potential focusing problem due to the disparity between aperture values and the reduced depth of field in the corresponding still image. The signal is used, e.g., to illuminate a warning element in the viewfinder or to insert a neutral density filter into the path of incoming light, in the latter case forcing the movie aperture to approach the still aperture and thereby causing the movie depth of field to approach the still depth of field.

Abstract: A user connected by telephone to a central telephone exchange can inform an automatic switching communications device directly of his own telephone number by dialing on his telephone set, which determines the corresponding address and all other possible characteristics from an on-line directory. The available taxis are entered in a stand-by memory. The taxis in first place in the stand-by memory is provided with the assigned address by the switching communications device via radio. The total area serviced by the device for the switching communications exchange of the taxis, can be partitioned into individual sectors, whereby each sector then corresponds to its own stand-by memory. Therefore, a very quick and efficient switching communications exchange is possible without a large expenditure for personnel.

Abstract: Adjacent cellular systems (101-103) are interconnected to form a network providing telephone coverage to mobiles located throughout their combined coverage areas (111-113). Each networked cellular system (101-103) includes base sites (412, 414, 416) located in cells (402, 404, 406) and a control terminal (420) coupled by data and voice lines to the base sites, a telephone central office (422) and the other cellular systems. Each base site (402, 404, 406) includes a base site controller 950, a scanning receiver 910, signalling transceiver 912 and up to eight voice channel transceivers (901-908). As mobiles move about the networked coverage area (111-113), intrasystem handoffs are provided between cells of the same cellular system, and intersystem handoffs are provided between border cells of adjacent cellular systems if intrasystem capacity is not available. Mobiles are paged throughout the networked coverage area (111-113) starting in the coverage area (111-113) in which the mobile last registered.

Abstract: A programmable interface system for interfacing a standard telephone set with a radio transceiver as part of a telephone network is provided. The radio transceiver may be a conventional cellular-type transceiver or other transceiver having typical control inputs and outputs similar to that provided by cellular transceivers. The programmable interface system converts tone-dial or pulse-dial inputs from the telephone into a serial data stream for storage in the transceiver. The programmable interface system can be programmed to automatically determine when the last numeral or digit is dialed for a particular area telephone system and provides a send signal to the transceiver when such determination is made. The system responds to incoming call signals, such as alert signals, from the transceiver and rings the telephone accordingly. The system simulates ring and dial-tone type signals under conditions typical of standard telephone set usage.

Abstract: An improved hands-free user-interactive control and dialing system is disclosed for use with a speech communications device. The control system (400) includes a dynamic noise suppressor (410), a speech recognizer (420) for implementing voice-control, a device controller (430) responsive to the speech recognizer for controlling operating parameters of the speech communications device (450) and for producing status information representing the operating status of the device, and a speech synthesizer (440) for providing reply information to the user as to the speech communications device operating status. In a mobile radiotelephone application, the spectral subtraction noise suppressor (414) is configured to improve the performance of the speech recognizer (424), the voice quality of the transmitted audio (417), and the audio switching operation of the vehicular speakerphone (460).

Abstract: A safety seat stand apparatus for coin-operated telephone sets includes: a stand body with a horizontal portion and a vertical portion having an open receiving chamber formed in the horizontal portion for securing a coin-operated telephone therein; a drawer-type coin box with a first lock device movably provided under horizontal portion in communication with the open receiving chamber; an information panel structure provided on the vertical portion of the stand body for posting various charges and information thereon; and a check member with a second lock device and a press piece closely engaged with the vertical portion of the stand body so as to safely secure the coin-operated telephone set in the open receiving chamber through the second lock device and the press piece; thereby, a coin-operated telephone set combined with the safety seat stand apparatus can be fixed on any solid supporting object for convenient usage.

Abstract: An adapter for a cellular mobile phone unit which converts the unit to permit simultaneous insertion of a plurality of telephone numbers. A main circuit board is coupled to a microprocessor of the unit, which board includes a plurality of number assignment modules, or NAM's (ROM's), each NAM having its own unique telephone number code. The NAM's are connected such that fifteen of the sixteen pin-connections of each NAM are correspondingly and respectively connected in series, for coupling to the fifteen pin-connections of a plug at one end of a ribbon cable, the other end of the ribbon cable being coupled to the microprocessor of the unit via the conventional NAM connection therefor. Each remaining pin of each NAM, which is not connected in series, is connected to a unique stop of a multi-position switch, so that a selected one of the NAM's may be coupled to the microprocessor in order to change the telephone number from one to another.

Abstract: In an installation containing at least one stationary unit (5) with a radio transmitter and a radio receiver, both with short range, and at least one, and preferably several portable, wireless telephone sets (4) with a radio transmitter and a radio receiver, both with short range, for exchanging telephone messages with one of the stationary units in the installation (1, 2, 3) the stationary units (5) are each adapted to exchange telephone calls simultaneously with more than one portable telephone set (4) on radio speech channels, adaptively selected among a plurality of radio speech channels common to all radio transmitters (9, 31) and radio receivers (10, 32).

Abstract: A computer-controlled cordless telephone system having a base unit and a dset unit provides for increased functionality in communications between the base unit and the handset unit, and also provides a controlled power-up/power-down mode of operation for the handset unit. Increased functionality is achieved by employing a message format for control signals transmitted between the base unit and the handset unit in the form of frequency shift keyed (FSK) signals which include a data field. This data field may be in the form of either opcode data or digit data, thereby allowing for many different commands or functions. Power to a computer, a receiver and certain other selected circuitry in the handset unit is controlled to minimize power consumption when the handset unit is in an out-of-cradle-and-standby state. Power to other nonessential circuitry in the handset unit is turned completely off during this state.

Abstract: The apparatus comprises a post anchored to the ground including a closable compartment containing a removable coin box, and a container attachable to the post. The post comprises means for concomitantly opening the compartment, extracting the coin box from the compartment and releasing the container from the post for access to internal means included in the post and the container. The apparatus has only a single entrance for access to the coin box compartment and internal means, thus providing effective protection to the interior of the apparatus at low cost.

Abstract: A method and apparatus for processing a call from a credit card telephone paystation reads magnetic encoded data on a credit card and produces a credit card identification signal. The credit card identification signal is identified as valid prior to enabling the telephone call. Call information data is stored at the telephone paystation including the credit card identification signal, the called number, the time and date of the call and the call duration. The stored call data is transmitted at periodic intervals to a central billing computer upon request by the central billing computer.

Abstract: Telephone apparatus mounted on an airplane food and beverage tray which is pivotable from a storage position nearly flush with the back of a seat of an airplane to a position of use, and includes a telephone handset that in a storage position in a tray recess is substantially flush with the surface of the tray that the recess opens through, the handset including a microphone portion and a combination credit card reader and speaker portion resiliently urged to an inclined condition relative to the microphone portion, latch mechanism to releasably retain the handset in the tray recess, a reel mounted in the tray that is resiliently retained in a datum position that the telephone cord connected to the handset is tightly wound and the second telephone cord that is electrically connected in the reel to the first cord is loosely wound, the second cord being connected to a terminal on a wall of the airplane which in turn is electrically connected through a computer to the primary telephone transmitter.

Abstract: A mobile radio communication system has base stations 1a, 1b, 1c at the centers of major service areas A, B, C defined by a contiguous array of hexagons or partially overlapping circles, and repeater or one way relay stations 3a-3m at each vertex or intersection point. The repeater stations have directional receiving antennas subtending successive 120.degree. arcs of surrounding minor service areas similarly defined by a ring array of hexagons or circles, amplifiers for imparting a high gain to signals received from mobile units in the minor service areas, and narrow width transmitting antennas for relaying the amplified signals to the base station closest each mobile unit. Such an arrangement enables a substantial reduction in the transmitter output capacity of the mobile units.

Abstract: In a radio frequency communication system in which a radio frequency communication signal is transmitted between a radio terminal (14) and a mobile station (24), it may be that an unauthorized third person uses a scanner-receiver (60) to intercept the communication signal. In order to prevent such an interception, the unit comprises a detecting circuit (30) for detecting an internal signal which is transmitted between a telephone exchange (12) and the radio terminal (14) and is concerned with an ordinary voice signal. The detection circuit produces a detection signal when the internal signal is absent. Responsive to the detection signal, a control circuit (32) controls the internal signal to prevent the interception, as by sending a dummy voice signal whenever the ordinary voice signal is absent.

Abstract: A cordless telephone is described comprising a fixed part which includes a reception section for receiving exact reception channel frequencies lying in a predetermined frequency range at equal intervals apart and a transmission section for transmitting exact transmission channel frequencies lying at a predetermined duplex interval from the reception channel frequencies. The cordless telephone further comprises a mobile part which includes a reception section for receiving frequencies lying in the range of the transmission channel frequencies of the fixed part and a transmission part for transmitting frequencies lying in the range of the reception channel frequencies of the fixed part. The mobile part includes a frequency control loop which using the transmission channel frequency transmitted by the fixed part as reference frequency holds its reception section fixedly tuned to the received transmission channel frequency.