Abstract: A tablet type coordinate input apparatus comprises a flat medium for propagating a longitudinal elastic wave, longitudinal elastic wave detecting elements disposed on part of the end-adjacent side surfaces or of the front surface of the flat medium, a longitudinal elastic wave input member having an end portion terminating in a sharp-pointed end and brought into pressure engagement at that end with any desired position on the surface of the flat medium to radiate the longitudinal elastic wave from that end, an amplifier circuit amplifying electrical signals indicative of the elastic wave detected by the detecting elements, a comparator circuit comparing the signals amplified by the amplifier circuit with a predetermined threshold voltage thereby generating delay pulse signals corresponding to the propagation times of the longitudinal elastic wave, a counter circuit counting the lengths of time elapsed from the time of radiation of the longitudinal elastic wave toward the flat medium as a result of pressure en

Abstract: A television receiver for receiving standard television channel signals and a scrambled television channel signal includes a channel selector which selects one of the television channel signals, a tuner which tunes the selected television channel signal, and a converting circuit which converts the scrambled television channel signal to a vacant standard television channel signal for tuning by the tuner.

Abstract: A remote control apparatus having a commander and a receiver. In a wireless remote control system for a television receiver having a channel command device and a responding device, the channel command device includes a channel selecting circuit for selecting one channel command from among a plurality of predetermined channel commands, a command signal generating circuit for generating a channel command signal corresponding to a selected channel command, and a channel command transmitting circuit having a speaker for transmitting the channel command signal; and the responding device includes a channel command receiving circuit having a microphone for receiving the transmitted channel command signal and a channel command discriminating circuit for discriminating the channel command signal and supplying a channel selecting signal corresponding to the discriminated channel command signal to control a tuning circuit of the television receiver.

Abstract: A muting circuit for a television receiver of the type having a tuner which is operative to select a desired channel in accordance with a channel selection operation to produce a channel select signal representing the selected channel, a detector circuit for detecting whether a video signal is present or not, a muting signal generator circuit supplied with an output from the detector circuit and the channel select signal representing the selection of a predetermined channel to produce a muting signal when the predetermined channel is selected but no output is produced by the detector circuit, and a muting circuit coupled to a low frequency signal transmission path in response to the muting signal from the muting signal generator circuit to cut off or attenuate the transmission of a low frequency signal.

Abstract: A remote control apparatus is constituted by a command encoding device and a command decoding device.

Abstract: An automatic modulation control in a transmitter, comprising an alternating modulation signal source, a modulation signal amplifier, a carrier generator, a modulator for modulating the carrier signal as a function of the output of the modulation signal amplifier, a threshold detector coupled in a direct current manner to the output of the modulation signal amplifier for threshold detecting the modulation signal output, a smoothing circuit for smoothing the threshold detected output, an amplifier for the threshold detected and smoothed output, and a control circuit for controlling the input of the modulation signal to the modulation signal amplifier as a function of the output of the threshold detected output amplifier.

Abstract: A digital tuning receiver having an electrically tuneable tuner and an AFT circuit is driven in a unidirectional sweep by the D/A converted output of a reversible counter. The reversible counter continues to count input pulses, and the unidirectional sweep continues until stopped by the reception of a signal which produces a first signal from an AFT frequency discriminator followed within a predetermined time by a second signal of opposite polarity from the AFT frequency discriminator. The number stored in the stopped reversible counter may be further adjusted by AFT signals and stored for later recall. If the second signal is not received within a predetermined time, as occurs with spurious beat signals, the sweep is not stopped but continues until a proper signal is received.

Abstract: A process for producing a paper container having high impermeability to liquid comprising spray coating a polymerizable solution containing a prepolymer, photosensitizer and/or reactive diluent onto a wall surface of previously fabricated paper containers, allowing the prepolymer and/or reactive diluent to polymerize by an ultraviolet irradiation to thereby form a liquid impermeable coating on the wall surface of the container.

Abstract: In a channel selecting apparatus for a television receiver having a tuner with a voltage-controlled, variablereactance device as its tuning element, and in which such tuning element has a non-linear relation between its control voltage and the resulting receiving frequency; a sweep pulse generator is operable for producing sweep pulses, a counter counts the sweep pulses for producing progressively changing binary codes corresponding to the changing counts of the counter and which represent respective control voltages for the variable reactance device, a digital-to-analog converter receives the binary codes and converts the same into the respective control voltages for the variable reactance device, and a circuit is provided for varying the period of the sweep pulses so that the rate of change of the receiving frequency is substantially uniform over the range of the progressively changing binary codes.

Abstract: A tuning system for digitally controlled electronically tuned tuner with automatic fine tuning (AFT) constantly operable to hold the tuner at a predetermined optimum frequency setting, especially a television channel. A reversible counter provides the digital signal to control the tuning of the tuner and is, itself, deliberately shifted from one setting to another by pulses from a source, such pulses being applied to the UP input terminal of the counter as the up-tuning pulses to shift the tuner frequency higher. Pulses from the same source are also used as down-tuning pulses when applied to the DOWN input terminal of the tuning pulses to a lower frequency supplied to two AFT AND circuits. One output logic up-tuning instruction signal E.sub.U of the AFT circuit enables the up-tuning AFT AND circuit only in a certain sub-range below the desired frequency. The other output logic down-tuning instruction signal E.sub.

Abstract: In a channel selecting apparatus for a television receiver having an electronic tuning tuner for changing the receiving frequency in accordance with an analog control signal applied thereto; a memory is provided with a plurality of addresses at which respective digital codes each intended to identify a respective broadcast channel are selectively stored or written in a programming mode of the apparatus, and, in a channel selecting mode of the apparatus, a selected channel identifying digital code is read out of the memory to a digital-to-analog converter which converts the same into a respective analog control signal for tuning the tuner to a receiving frequency.

Abstract: Shaped aluminum bars fresh from an extruder machine are coated with a specific organopolysiloxane composition while remaining uncooled and staying at temperatures not lower than about 250.degree. C, or at a temperature between about 550.degree. and 250.degree. C. The thus coated aluminum bars are then, preferably, subjected to annealing. The coatings formed on the surfaces of the aluminum materials have a superior resistance to attack by chemicals, weather, stains and heat as well as excellent adhesion and mechanical properties.

Abstract: In a channel selecting apparatus for a television receiver having an electronic tuning tuner for changing the receiving frequency in accordance with an analog control signal applied thereto; a memory has a plurality of addresses for storing respective digital codes each identifying a respective channel, and such addresses in the memory are selectively activated so as to effect read out of the respective channel identifying digital code to a digital-to-analog converter which converts the same into a respective analog control signal for the tuner. Deviation of the receiving frequency, as established in response to the analog control signal, from the correct receiving frequency for the channel identified by the digital code then being read out of the memory is detected, and in response to a detected deviation the ditial code being received by the digital-to-analog converter is automatically modified or changed in the sense for removing said deviation and thereby effecting a fine tuning operation.

Abstract: In a channel selecting apparatus for a television receiver having a tuner with a voltage-controlled variable reactance device as its tuning element; digital codes representing or identifying respective channels are stored at respective addresses in a memory, and a digital-to-analog converter provides an analog control voltage for the variable reactance device in correspondence to each digital code selectively read out of the memory in a channel selecting mode of the apparatus. Further, in a programming mode of the apparatus, the changing digitally coded counts of a counter which is counting sweep pulses are applied to the digital-to-analog converter for similarly controlling the variable reactance device and selected counts of the counter, for example, those which result in the appearance on the receiver screen of pictures or test patterns broadcast by selected television stations or channels, are written at selected addresses in the memory as the channel identifying digital codes.

Abstract: In a channel selecting apparatus for a television receiver having an electronic tuning tuner for changing the receiving frequency in accordance with an analog control signal applied thereto; a memory has a plurality of addresses for storing respective digital codes each identifying a respective channel and which are selectively activated so as to effect read out of the respective channel identifying digital code to a digital-to-analog converter which converts the same into a respective analog control signal for the tuner. A deviation of the receiving frequency, as established in response to the analog control signal, from the correct receiving frequency for the channel identified by the digital code then being read out of the memory is detected, and, in response to a detected deviation within a pull-in range of an automatic fine tuning (AFT) circuit, the latter changes the digital code applied to the converter in the sense for removing such deviation and thereby achieving the correct tuned condition.

Abstract: A radio receiver for use in monitoring a plurality of channels of predetermined frequencies in a plurality of predetermined frequency bands, in which radio receiver, specially arranged receptacles for crystal insertion comprising common receptacles and corresponding receptacles each composed of a pair of conductive means are incorporated for efficient band selection and frequency setting by merely inserting crystals in the receptacles. The radio receiver further includes an auxiliary tripler for ensuring optimum performance even when the triple frequency relation in the frequency multiplication is deviated from in the plurality of frequency bands.

Abstract: A television signal detecting circuit is disclosed which has a first electric source, a second electric source (ground potential) different from the first electric source, a series circuit inserted between the first and second electric sources and consisting of a resistor and a condenser, a switching element connected in parallel with the condenser and adapted to become conductive and non-conductive in response to a synchronizing signal of the television signal, and a voltage detecting device connected to a junction point between the resistor and the condenser. The series circuit consisting of the resistor and the condenser prevents the voltage detecting device from becoming conductive when the television signal is absent and only noise is supplied, whereby the erroneous operation of responding to the noise as if it were the television signal can be prevented.

Abstract: Remotely actuated power control apparatus having a control signal processing circuit which receives a remote control signal emitted from a remote transmitter and controls a power switch of an electronic instrument. The control apparatus includes a battery connected to the remote control signal processing circuit for supplying an operating voltage to the latter, and it also includes a power supply circuit connected to the electronic instrument substantially in parallel thereto, whereby an electronic power of the electronic instrument is controlled ON and OFF by the power switch.

Abstract: A remote control system for selectively controlling plural functions of electric apparatus comprising a combination of an improved transmitter for generating a command signal of a single frequency which is transmitted intermittently for a plurality of intervals of time, the length of each of which is determined in response to selection of one of the plural functions, and a receiver for receiving the command signal and producing a control signal for controlling the selected function in response to the length of each of the intervals and to the number of the intervals of the received command signal.