Abstract: A method and an equipment for wireless transmission of telephone calls between a stationary unit (1) connected to a telephone set (3) at a short distance from the stationary unit provides that all pairs of units (1, 3) have access to a plurality of common duplex radio speech channels for transmission of calls, and to a common radio signalling channel for transmission of signals referring to connection and disconnection of the speech channels. The radio speech channels are assigned after adaptive channel scanning in that they are listened to before a call, and a channel selected which is idle with respect to calls. The selection of an idle channel takes place automatically with the use of radio receivers (12, 25), channel selectors (15, 28) and circuits (16, 29) incorporated in both units.

Abstract: This invention pertains to a microcomputer controlled coin telephone set which prevents coin call fraud and performs all of the coin discrimination functions. The microcomputer also checks the operational readiness of the telephone set to prevent the acceptance of coins into a hopper for late collection by a coin box unless or until the set is fully functional.

Abstract: A circuit for controlling the gain of an amplifier typically used in a video camera has a automatic gain control circuit to provide the camera output signal within predetermined limits and a switch to permit exclusion of the automatic gain control feature and the use of a manually variable gain control having a greater range and overlapping that of the automatic gain control to provide further flexibility to the user of the camera so that objects normally too bright or too dark to be accommodated within the range of the automatic gain control circuit can be recorded. Differential amplifiers operating in conjunction with current mirror circuits are provided in both the variable gain amplifier circuit and in the circuit that provides the gain control signal thereto to provide a gain control circuit that lends itself to integrated circuit fabrication.

Abstract: A video camera comprising a body with a handgrip attached to one side thereof is disclosed. The handgrip accommodates a automatic focus adjusting mechanism, which effects automatic focus adjustment of an image focusing optical system for focusing an image of an object on an image pick-up plane by emitting measuring light from a light emitting section and measuring the distance of the object from a lens by detecting the measuring light reflected by the object in a light receiving section. Either the center of the measuring light emitted from the light emitting section or the center of the measuring light incident on the light receiving section coincides with the optical axis of an image pick-up optical system.

Abstract: A video camera comprises a camera tube, a main optical system including a focusing lens, an afocal system, and a master lens, for directing external light towards the camera tube, an automatic focusing system having a sensor which obtains a focusing information responsive to an incoming light to the sensor, for carrying out an automatic focusing by displacing the focusing lens responsive to the focusing information, a first light separator for reflecting and separating a portion of light passing through the afocal system within the main optical system, a second light separator for reflecting and separating only a portion of the separated light which is separated by the first separator and is required for a detection of the sensor of the automatic focusing system, and for directing the separated light which is separated by the second light separator towards the sensor as the incoming light, and an optical type viewfinder for receiving a light portion which is among the separated light which is separated by the

Abstract: A system is disclosed for automatically controlling the light intensity of a light source as a function of the amount of light received by a photosensor. In a preferred embodiment the light source illuminates a reference background which, in turn, reflects the light incident thereon to a photosensor in a video camera. In response to this reflected light, the photosensor produces a video signal which is proportional to the amount of light reflected thereon. A first processor is responsive to the reception of the video signal over a preselected period of time and provides a first signal which is proportional to the amount of reflected light received by the photosensor over that preselected period of time. A second processor is responsive to the first signal and generater a control signal to automatically cause an adjustable power supply to change the voltage applied to the light source as a function of the amplitude of the control signal.

Abstract: A subsidiary telephone set successively transmits first and second pilot signals to a master telephone set. The master telephone set receives the first pilot signal to be brought in a standby state and subsequently receives the second pilot signal to be connected to a telephone line. Consequently, telephone communication is enabled.

Abstract: A direct broadcast communication satellite system prevents over-charge for earth-subscriber to earth-subscriber toll calls via radio links to an earth station regardless of faults which may occur in satellite channels. A central earth station controls the frequency assignment of the radio link channels used for voice communication. Each of a plurality of subscriber earth stations has at least one voice communication terminal, with means for identifying a call destined for a subscriber at that earth station. The continuity of the channels involved in that call are monitored by periodically transmitting and receiving out-of-band signals on the assigned channel. It appears that there has been a loss of signal when the out-of-band signal does not appear, twice in succession. Then, the channel is released and the toll charges are terminated.

Abstract: Dial keys and other keys for a telephone set are provided on an operation board mounted on a steering wheel so as to make an answer-back in accordance with dial operation. The answer-back is effected in terms of numeral values, dial codes or the name of the other party corresponding to each dial code in accordance with operation of the corresponding numeral keys. If a confirmation key is not operated within a predetermined time after an answer-back of the name of the other party, the shortened dial code is updated to another adjacent value to repeat such answer-back sequentially. The name of the other party is issued from a non-volatile memory which stores therein voices of the user.

Abstract: A circuit which prevents a telephone station from being used for unauthorized toll calls while allowing toll calls to be made when preceded by authorized passwords. When the telephone station is in the toll restriction mode of operation a microprocessor disconnects the tone generator from the keypad and provides audible and visual error signals upon detection of operation of the "0" or "1" keypad buttons. Upon detection of simultaneous operation of the "1" and "2" keypad buttons, the microprocessor provides audible and visual signals to prompt entry of a password. If a valid password is entered, the telephone station enters the unrestricted mode of operation and the toll restriction circuit is disabled until the handset is returned to the on-hook position after termination of the subsequent toll call.

Abstract: A method and apparatus for obtaining a profile read-out of an object in a field of view of a solid-state imager without destruction of the image data at the imager. In an application using a CID imager, X-axis and Y-axis projections of the array are obtained by sensing charge transfer from sequentially addressed columns into all rows simultaneously followed by sensing charge transfer from sequentially addressed rows into all columns simultaneously. Calculation of centroid and area of an image can be obtained without the necessity of reading out each pixel.

Abstract: A method and means for controlling telephone interconnect traffic on a trunked radio system is described. The present invention continuously monitors all types of communication traffic on the system and in response to an increasing dispatch access delay, reserves certain repeaters for dispatch use only during a predetermined period. The present invention also contemplates a system in which the number of simultaneous telephone interconnect calls permitted on the system during a predetermined period is dynamically altered in response to system loading. In addition, the present invention establishes a variable, periodically updated, maximum interconnect call length based on the current system dispatch access delay.

Abstract: Low-frequency noise in the video output of a charge-injection-device imager is cancelled by delaying the low-frequency components of video plus noise for one horizontal interval and subtracting therefrom the undelayed noise from corresponding cells of the same row of the imaging matrix. High frequency noise is eliminated in a separate channel by low-level clipping of the high-frequency component of the video signal. The high-frequency video component is delayed for one horizontal interval to align it with the low-frequency video component and the two components are summed to reconstruct the full video signal from which both high-frequency and low frequency noise is absent.

Abstract: An auditor system (10) includes a control circuit (30) that employs an off-hook detector (32) connected across the tip and ring lines (12 and 14) of a coin telephone to determine whether the coin telephone is off hook. It also employs a step-pulse detector (36) connected across the step relay terminals of the coin telephone, accept-pulse and reject-pulse detectors (40 and 42) connected across its accept/reject relay terminals, and a coin contact sensor (48) connected across its coin-contact terminals to keep track of the number of coins of each denomination accepted by the coin telephone. When the auditor system determines that the coin receptacle has collected a predetermined volume of coins, it connects a high-current power supply (18) across the tip and ring lines and thereby powers a transmitter (68) that sends dialing signals over the telephone lines to call up a data-collection computer at a remote location.

Abstract: A two-dimensional image read-out device comprises an insulating substrate, a plurality of Y-line electrodes formed on the insulating substrate and arranged parallel with each other, a plurality of X-line electrodes formed over the insulating substrate and arranged parallel with each other in a direction perpendicular to the Y-line electrodes, a photoconductive layer interposed between the Y-line and the X-line electrodes, gate electrodes for selecting a pair of the Y-line and the X-line electrodes, and three scanning circuits for selecting some of the Y-line electrodes, and some of the X-line electrodes, and at least one of the gate electrodes, respectively.

Abstract: A solid state image sensor is disclosed which includes a photosensitive region consisting of a group of first vertical shift registers formed of a plurality of charge transfer devices, photoelectric converting sections electrically separated from one other by a channel stop section between adjacent ones of the first vertical shift registers and capable of accumulating a signal charge and devices transferring the signal charge of the photoelectric converting sections to corresponding one of the first vertical shift registers, a storage section consisting of a group of second vertical shift registers electrically connected to one ends of the first vertical shift registers, respectively, a charge transfer horizontal shift register electrically connected to one ends of the second vertical shift registers, a section for transferring undesired charges within the first vertical shift registers during a vertical blanking period after a light receiving period, a section for transferring the signal charge from the phot

Abstract: A solid-state image pickup device and a still picture recording device in which blooming and vertical smearing are eliminated. A drive circuit applies vertical and horizontal synchronizing signals to an image pickup element or area image sensor, and an exposure control circuit applies an exposure time control signal thereto for controlling the length of the exposure time according to the intensity of the image light exposing the pickup element or sensor. A scanning stopping circuit stops the application of the synchronizing signals to thereby stop the scanning of the area image sensor for a period of time starting from a time before the start of exposure until the occurrence of a first pulse of the vertical synchronizing signal after application of the exposure time control signal.

Abstract: Improved telephone number input terminal devices for memory stored dialing data for automatic dialing have a divided housing (12) with an upper section (13) that is readily attached to and removed from a base section (14) so that a printed circuit board (61) which carries a plurality of electric elements (17) may be made inexpensively and readily assembled. A single electric element (51) is carried on the card finder (25) which is slidable on and retained by an enlarged end portion of the cover (22) for the index cards. Light emitting diodes and Hall effect devices are examples of preferred electric elements that may be used in the switch means to effect the electric switching required.

Abstract: An automatically switching circuit for the receiving sensitivity in a cordless telephone comprises a base unit and a portable handset in wireless communication with the base unit, which is responsive to the flow of charging current from the base unit to the portable handset for reducing the gain of an antenna or amplifying stage to a desired low level, thereby preventing erroneous ringing due to surrounding noise signals or disturbances while the portable handset rests on the base unit.

Abstract: A solid-state imaging device assembly is disclosed, comprising a solid-state imaging device; a metal member provided with first means for positioning the solid-state imaging device and second means for positioning the assembly on an apparatus utilizing the assembly; and an insulating frame for sealing the solid-state imaging device together with the metal member in a state in which the solid-state imaging device is positioned with respect to the metal member by the first positioning means of the metal member.