Abstract: A heavy duty pneumatic radial tire comprises a carcass ply, a belt disposed at an outside of the carcass ply in the radial direction and comprised of two or more belt layers, at least one auxiliary belt layer disposed in a widthwise central portion of the belt at a width narrower than that of the belt, and a tread, wherein when the tire is mounted onto a design rim defined in TRA standard and inflated under an internal pressure corresponding to 10% of an air pressure defined in the TRA standard, a radius of curvature of an outer profile at both side regions of the tread (Rs) is made larger than a radius of curvature of the outer profile at a central region of the tread (Rc).

Abstract: A high tensile strength hot-rolled steel sheet comprises 0.04 to 0.09% C, 0.1% or less Si, 0.5 to 1.5% Mn, 0.02% or less P, 0.01% or less S, 0.1% or less Al, 0.001 to 0.008% N, and 0.01 to 0.

Abstract: The method for manufacturing steel sheet comprises the steps of: forming a sheet bar; forming a steel strip; primary-cooling; air-cooling; secondary-cooling; and coiling. The sheet bar is finish-rolled at finish temperatures of (Ar3 transformation point−20° C.) or more. The primary cooling cools the finish-rolled steel strip at cooling speeds of more than 120° C./sec down to the temperatures ranging from 500 to 800° C.

Abstract: The method for manufacturing steel sheet comprises the steps of: rough-rolling to form a sheet bar; finish-rolling the sheet bar to form a steel strip; applying primary cooling and secondary cooling to the finish-rolled steel strip; and coiling the secondary-cooled steel strip. The primary cooling is conducted at cooling speeds of 120° C./sec or more down to the temperatures of from 500 to 800° C. The secondary cooling is conducted at cooling speeds of less than 60° C./sec.

Abstract: A heavy duty pneumatic radial tire comprises a radial carcass, a main cross belt and a tread portion, in which the main cross belt is formed by laminating at least three rubberized cord layers so that the cords in each layer are parallel to each other but the cords between the adjoining layers are crossed with each other and extend in opposite directions with respect to an equatorial line of the tire. In such a tire, a pair of cushion rubbers are arranged between the adjoining rubberized cord layers constituting the main cross belt at their both end portions by setting a position relation between mutual cushion rubbers at both belt ends to an optimum value to thereby prevent or control the occurrence of the belt end separation failure.

Abstract: An inexpensive, compact digital radio receiver corrects IQ imbalance, non-orthogonal I and Q phases, and DC offset by a DSP. The digital radio receiver is equipped with an antenna, an RF/IF converter for converting a radio frequency into an intermediate frequency, an IQ separator for separating I and Q, a filter for eliminating a noise such as a radio frequency, a multiplying sampler for sampling the output of the filter, and a digital signal processing unit mainly comprised of the DSP which implements an algorithm for estimating and correcting an IQ distortion and also performs quadrature phase demodulation. The IQ distortion can be removed inexpensively by making use of a part of a standard radio operation, hardly requiring the use of hardware for adjustment.

Abstract: A synchronizing signal detection apparatus of the present invention comprises a demodulator for digitally demodulating input signals, a partial matching error counter for comparing every bit of the demodulated input signal bit pattern demodulated by said demodulator with a part of the known synchronizing signal bit pattern. The apparatus further comprises a remaining bit matching counter for comparing the input signal bit pattern with remaining bits of the synchronizing signal bit pattern used in the partial matching error counter, or with all synchronizing signal bit pattern, for every bit, when an error bit number, which is compared in the partial matching error counter, is equal or less than a first threshold value. When the error bit number compared in the remaining bits matching error counter is equal or less than a second threshold value, synchronizing signal is assumed to be detected. In the apparatus of the present invention, bit pattern comparison numbers are decreased.

Abstract: A heat storage type air conditioning system capable of performing refrigerant receiving and discharging control and oil quantity control, which, in operating the general cooling circuit and the cold radiating circuit simultaneously or separately, is free from difficulties that the compressor is damaged or the cooling capacity is lowered when the quantities of refrigerant in those circuits are excessively increased or decreased, and is able to continue the operations with the quantity of refrigerant and the quantity of ice machine oil adjusted to suitable values. In the heat storage type air conditioning system, evaporators are provided in a general cooling circuit driven by a compressor and in a cold radiating circuit driven by a refrigerant gas pump, respectively, so that those circuits operate independently of each other. Furthermore, bypass circuits are provided to allow refrigerant to flow between liquid pipes and between gas pipes in those circuits.

Abstract: A receiving part is provided externally of the body of a power tool, having an internal combustion engine provided with an ignition system. A plug is insertable in the receiving and has a portion of the ignition system incorporated in it. The receiving socket and the removable plug are provided respectively with connecting parts whereby, when fitted together, they will be electrically connected with each other, completing the ignition system.

Abstract: A start safety apparatus for an internal combustion engine of a multi-purpose working machine such as a chain saw or grass trimmer is disclosed, wherein the ignition timing of the internal combustion engine is retarded at the time of starting the engine, so that the rotational speed of the internal combustion engine is reduced below the clutch-in speed where the load of the saw chain and cutting blade, as the case may be, is to be operated.

Abstract: The present invention relates to a device wherein a positive voltage induced in an exciter coil at the time of a high speed rotation is sensed, a switching transistor is switched on by the terminal voltage of a time constant circuit connected in series with the exciter coil through the switching transistor and, in spite of a negative voltage then induced in the exciter coil, the discharge of a discharging capacitor connected in series with an ignition coil to the ignition coil is delayed by a thyristor for controlling the discharge in response to the above mentioned time constant characteristic to delay the ignition speed, that is, to positively prevent the over-rotation of the internal combustion engine.