Abstract: A chrominance signal reproducing circuit reproduces a chrominance signal with reduced crosstalk, as by using a comb filter, and a luminance signal reproducing circuit reproduces a luminance signal. The reproduced luminance signal is delayed by a horizontal line interval and a difference signal is produced representing a difference between the delayed and undelayed luminance signals. A summing circuit sums the difference signal with the delayed luminance signal to produce a crosstalk-eliminated delayed luminance output signal.

Abstract: A method for manufacturing a cylinder having scavenging passages for a two-cycle internal combustion engine is disclosed which comprises the steps of forming bulged portions protruded radially outwardly in a portion of a cylindrical liner, and surrounding the liner by casting through a high pressure diecast method, thereby form a main part of the cylinder.

Abstract: Disclosed is a centrifugal clutch of the type that includes a driving side member, a driven side member and a plurality of clutch shoes each having one end connected to the driving side member, the other end being capable of being friction-engaged with the driven side member, the driving side member and the clutch shoes being integrally formed using a high specific gravity resin type composite material.

Abstract: A connector for a cap applied to a mouth of a tank including an engaging member having an annular portion formed of elastic material connected to one end of an elongated portion, and a plurality of beam-like portions formed integrally with the annular portion and arranged substantially in the form of a letter V in the annular portion.

Abstract: An internal combustion engine with an automatic starter for a portable working machine, wherein a reduction device is arranged at an end portion opposite to an output end of a crankshaft of the internal combustion engine, a generator being arranged at a side near the reduction device, the automatic starter being arranged in the proximity of a side portion of the internal combustion engine and being drivingly connected to the reduction device, a recoil-type starter being arranged coaxially with and adjacent to the end portion of the crankshaft.

Abstract: Disclosed is a two-cycle internal combustion engine including a protruding edge portion formed in a section of a lower side surface of an intake port which is adjacent to a pre-compression chamber of a cylinder. This protruding edge portion serves to deflect air-fuel mixture introduced into the pre-compression chamber through the intake port so as to direct it to a bearing portion provided between a piston and a connecting rod. Further, a cut-in groove is formed in the protruding edge section and is adapted to allow any liquid remaining in the intake port to flow into the pre-comparison chamber.

Abstract: A single mode laser glass fiber showing excellent laser oscillation characteristics even at a short fiber length can be efficiently obtained using a phosphate laser glass with excellent laser characteristics.

Abstract: In a crank, a tri-iron tetroxide thin film is formed over at least one of the inner surface of a hole formed in a crank arm and one end of a crank pin, and the end of the crank pin is press fitted into the hole formed in the crank arm.

Abstract: A color video signal processing circuit comprising an input terminal through which a color video signal including chrominance and luminance signals is supplied, a signal separating portion which includes both a subtraction-type comb-filter by which a first signal is derived from the color video signal and an addition-type comb-filter by which a second signal is derived from the color video signal, a level modifying portion for emphasizing the level of a first segment of the first signal residing in a predetermined frequency band lower than the frequency band of the chrominance signal and attenuating the level of a second segment of the first signal residing in the frequency band of the chrominance signal, an adder for adding an output of the level modifying portion to the second signal, a first output portion connected to the signal separating portion, and a second output portion connected to the adder.

Abstract: Signal processing apparatus for processing a color video signal formed of a luminance signal and a color carrier signal reproduced from a magnetic tape, in which the signals include respective crosstalk components produced from the tracks adjacent the track being traced. The color video signal was originally recorded so that the crosstalk components are frequency interleaved relative to the signal in the track being reproduced, and signal processing apparatus permits the luminance and color carrier signals to be processed and the respective crosstalk components eliminated using only a single time delay element for both luminance and color carrier crosstalk components. The single delay unit is part of a comb filter and is particularly adapted for fabrication as a CCD element.

Abstract: A Faraday rotation single-mode fiber having a high Verdet constant is disclosed, the core and the cladding of the fiber being made of a glass having the following composition: 26 to 38 mol % SiO.sub.2, 18 to 34 mol % B.sub.2 O.sub.3, 17 to 26 mol % Al.sub.2 O.sub.3, 18 to 32 mol % Tb.sub.2 O.sub.3, 0 to 5 mol % ZrO.sub.2, 0 to 5 mol % Ce.sub.2 O.sub.3, 0 to 5 mol % Pr.sub.2 O.sub.3, 0 to 5 mol % Dy.sub.2 O.sub.3 and 0 to 5 mol % Ho.sub.2 O.sub.3, provided that the total amount of the above ingredients is not less than 97 mol % and the total amount of Ce.sub.2 O.sub.3, Pr.sub.2 O.sub.3, Dy.sub.2 O.sub.3 and Ho.sub.2 O.sub.3 is 0 to 5 mol %.

Abstract: A data producing device in a signal reproducing apparatus, comprises a shift register supplied with synchronizing signals and codes which are time-sequentially reproduced from a recording medium, synchronizing signal detectors supplied with the synchronizing signals from the shift register, data transfer circuits provided in parallel with respect to each other and in series with the synchronizing signal detectors, and a control circuit for controlling the data transfer circuits so that a data is selectively read out and produced from a desired data transfer circuit among the plurality of data transfer circuits. The reproduced synchronizing signals and codes are transferred to the shift register and are read out from the shift register in response to a clock pulse having a predetermined frequency. The number of the synchronizing signal detectors is equal to the number of kinds of the synchronizing signals, and the synchronizing signal detectors are provided in parallel with respect to each other.

Abstract: A process for producing a novel cross-linked resin which comprises: reacting a bis(2-oxazoline) compound with a reactive compound which has at least one active hydrogen in the molecule, the reactive compound being at least one selected from the group consisting of a sulfonamide, an acid imide, an aromatic hydroxy-carboxylic acid and a bisphenol sulfone compound, in a molar ratio of the reactive compound to the bis(2-oxazoline) compound of not more than about 2, at an elevated temperature. About 5 to about 95 mole % of the reactive compound is replaceable by a dicarboxylic acid.The cross-linked resin may be usable for the production of machinery parts such as rolls and gears and embedded moldings of electrical machinery and apparatus parts as well as for electric insulating materials and dental uses. The cross-linked resin may further find applications in, for example, adhesives and various coating compositions.

Abstract: A synchronizing signal detecting circuit is used in a digital signal transmitting system which transmits a digital signal in which signals are time-sequentially multiplexed in terms of blocks, where each of the blocks are made up of digital data which are information signals subjected to a digital modulation, a synchronizing signal having a fixed pattern, and an error checking code arranged at a location separated from a location of the synchronizing signal by a predetermined number of bits. The synchronizing signal detecting circuit comprises a counter which is reset when a synchronizing signal detection output which has been discriminated as being correct by use of the error checking code is continuously obtained for N times, where N is a natural number greater than or equal to two.

Abstract: A process for producing a cross-linked polyesteramide which comprises: reacting a bis(2-oxazoline) compound with a dicarboxylic acid in a molar ratio of the dicarboxylic acid to the bis(2-oxazoline) compound of not more than about 1, at an elevated temperature in the presence of a catalyst selected from the group consisting of a strong acid, a sulfonic acid ester, a sulfuric acid ester and an organic halide which contains at least one halomethyl group in the molecule.The cross-linked polyesteramide may be usable for the production of machinery parts such as rolls and gears and embedded moldings of electrical machinery and apparatus parts as well as for electric insulating materials and dental uses. The cross-linked polyesteramide may further find applications in, for example, adhesives and various coating compositions.

Abstract: A memory circuit write-in system comprises a first circuit for supplying a digital signal including a time base fluctuation component, where one frame of the digital signal is constituted by at least a synchronizing signal and information data and the digital signal has a first repetition frequency with a period of one frame of the digital signal, a memory circuit for writing therein and reading out therefrom the digital signal supplied from the first circuit, and a second circuit for applying a write-in control signal to the memory circuit. The write-in control signal includes no time base fluctuation component and has a second repetition frequency substantially equal to the first repetition frequency, and the memory circuit is controlled by the write-in control signal so that write-in of the digital signal is carried out with a write-in period in a range of two times within the one frame period.

Abstract: A digital information recording system comprises a randomized digital signal forming circuit for forming a randomized digital signal by carrying out modulo-2 addition of at least digital information signals of a plurality of channels in a digital signal and a random code sequence which is generated independently, a detector for successively detecting values of each of a predetermined number of words from each of the digital information signals of a plurality of channels in the randomized digital signal, in terms of one word, and generating a detection signal only when values of bits in the one word are all "1" or all "0", a timing circuit for generating a timing signal for every period corresponding to a transmission period of a least significant bit in one word from each of the digital information signals of a plurality of channels, a polarity inverting circuit for passing the randomized digital signal unchanged during a period in which the detection signal is not generated from the detector, and inverting t

Abstract: In a circuit arrangement for a disk player of the type arranged to reproduce information prerecorded in the form of pits, a variable gain circuit for changing the frequency characteristic of the reproduced signal is provided. The level of the reproduced signal is detected at high and low frequencies so as to produce a control signal the voltage of which varies in accordance with the difference between the level of the high frequency signal component and the level of the low frequency component. The control signal is then applied to the variable gain circuit receiving the reproduced signal so that the frequency characteristic of the reproduced signal will be controlled. Thus, the level of the reproduced signal is boosted at its high frequency range.

Abstract: A new cross-linked polyester amide having structure in which the ester amide chain of the formula below: ##STR1## (wherein R and R' each are a bivalent hydrocarbon radical; n is a positive integer) as obtained by the reaction of a bis(2-oxazoline) compound and a dicarboxylic acid is contained in the polymer chain and at least 5% of its --NH-- group is cross-linked with a 2-oxazoline ring by ring-opening addition reaction.The cross-linked polyesteramide is tough and excels in abrasion resistance and solvent resistance and can be utilized in the molding of machinery parts such as rolls and gears and embedded molding of electrical machinery and apparatus parts as well as for electric insulating materials and materials for dental uses.

Abstract: A device for preventing radio frequency interference generated by spark plug of internal combustion engines. The device includes a cover member adapted to cover at least a part of the high-voltage portion of the spark plug such as high-tension cord together with the end of the plug connected to the cord. The cover member is made of a highly soft, flexible and electrically conductive rubber material (high molecular compound). The cover member is grounded through a grounding line to the body of the engine. This device is suitable for use in machines having limited space for mounting the radio frequency interference prevention device, such as chain saw having an internal combustion engine.