Abstract: Each of two bit lines in a pairing relationship and a word line transition detection signal line bear the same adjunctive capacitance, since connection points provided on plural memory cells establishing connections to each of the bit lines and connection points provided on plural word line transition detection circuits establishing connections to the word line transition detection signal line are laid out into the same form. Each of the memory cells contains a data storage, a first N-channel MOS transistor, and a second N-channel MOS transistor, the data storage being connected to the bit lines through the first and second N-channel MOS transistors. Each of the word line transition detection circuits includes a third N-channel MOS transistor and a fourth N-channel transistor, these transistors being sandwiched between the word line transition detection signal line and the ground.

Abstract: In a program control type processor for executing plural instructions including a vector pipeline instruction including a data processor for executing a pipeline operation, there is provided a program controller including a program memory, a program counter and a decoder, and is further provided an address generator and a data memory. When the vector pipeline instruction is read out from the program memory and is decoded by the decoder, the program controller stops the program counter and outputs a start signal, and thereafter, controls an operation of the data processor according to the contents of the vector pipeline instruction.

Abstract: An air conditioning apparatus including an indoor device having a first heat exchanger, a second heat exchanger, and a radiant panel. Air circulation mode is switched to radiant mode when a room temperature has reached a temperature set by a user. Refrigerant is changeably circulated through the first and second heat exchangers in a cooling operation so that dew is not formed on the radiant panel.

Abstract: A control system for use in an air conditioner including a room heat-exchanger and an outside heat-exchanger. For controlling the room temperature, the control system sets a plurality of cooling start temperatures and a plurality of heating start temperatures and compares the room temperature, sensed by a temperature sensor, with the plurality of cooling start temperature and the plurality of heating start temperatures so as to control the outside heat-exchanger in accordance with the comparison results. The plurality of cooling or heating start temperatures includes a first cooling or heating start temperature and a second cooling or heating start temperature lower or higher than the first cooling start temperature. The control system first performs the temperature control on the basis of the first cooling or heating start temperature and then controls it on the basis of the second cooling or heating start temperature under predetermined conditions.

Abstract: The present invention has an electrode for energization use of a thermal head having an unprecedentedly new electrode construction of a full peripherally surrounding type, so that one heating portion corresponds to one individual electrode without separation or independence of a heating resistor. Thus, the heating efficiency in the printing operation is improved to increase the thermal response property, thus making it possible to save the power. Furthermore, the full periphery surrounding electrode portion is adapted to be completely covered by the heating resistor to remove the dispersion of the resistance values of each dot responsible for the dispersion of the printing width of the heating resistor, and to completely provide uniformity by an energization overload trimming system.

Abstract: For preventing very small amplitude vibrations of the rod in a tensioner during high speed movement of a belt to be tensioned by the tensioner, a tube which is connected to a plunger which moves together with the rod is overlapped with a stationary member so as to define an annular clearance therebetween in an operating chamber of the tensioner. By filling an operating fluid in the clearance, shear strain is generated upon high speed movement of the plunger, which resists movement of the plunger.

Abstract: A hermetically sealed autotensioner used for adjusting tension of engine belts comprises a cylinder, a plunger slidably fitted in the cylinder and having a rod projeced from the cylinder, a free piston slidably fitted in the cylinder, and a rod guide fitted in the tip portion of the cylinder so as to slidably support the rod. When a large thrust force acts on the rod, the rod guide serves as a bearing for the rod so that no scuffing or rocking motion occurs between the cylinder and the plunger.

Abstract: A self-contained hydraulic lash adjuster in which a bag member is disposed in a reservoir chamber formed within a plunger. An open upper end portion of the bag member is fixedly mounted with a metal ring therein so as to be fixed to an upper end portion of the reservoir chamber in spite of successive deformation of the bag member in accordance with oil-volume variation in the reservoir chamber.

Abstract: A 2,3-dihydro-2,3,5-trimethyl-4H-pyran-4-one derivative represented by general formula: ##STR1## where R is ##STR2## --CH(OCH.sub.3).sub.2, --CH(OC.sub.2 H.sub.5).sub.2, --CHO, --CH.sub.2 OH, --CH.dbd.CH.sub.2, .dbd.CHCH.sub.2 CH.sub.3, --CH.dbd.CHCH.sub.3 or ##STR3## The derivative is useful as a sex attractant for drugstore beetles.

Abstract: An auto-tensioner for belt systems and a method for adjusting the belt tension, said auto-tensioner comprising an idler pulley, a tensioner body, a bracket fixed to the tensioner body and swingable around a first fixing bolt, a second fixing bolt inserted in a slit of the bracket so as to adjust the swing degree of the bracket, and a third bolt for positioning the idler pulley; while said adjusting method comprising the steps of making the first and second fixing bolts to be half-tightened state, tightening the third bolt to position the idler pulley, adjusting the spring force for biasing the bracket, fully tightening the first and second fixing bolts, and finally removing the third positioning bolt, thereby to avoid the troublesomeness in the adjusting works of belt tension.

Abstract: An automatic tensioner for adjusting the tension in a timing belt, V belt, or the like has a locking mechanism. The tensioner has a plunger always biased toward a large oil chamber containing oil. A rod having a head that is pressed against the timing belt or the like is inserted in the body of the tensioner so as to form a small oil chamber. A piston is received in the body of the tensioner. Normally, the piston bears against the plunger. If oil should leak from the large oil chamber, then the plunger will move downward, permitting the piston to engage the rod. Thus, the rod is locked.

Abstract: A hydraulic valve lifter is used in the valve train of an internal combustion engine to take up the lash on operating clearance in the valve train. The valve lifter is comprised of a first cylindrical body member having a top wall, a second cylindrical body member slidably mounted within the first body member and having a bottom wall, a plunger member slidably mounted within the second body member for defining a reservoir chamber and a pressure chamber, a guide member of thick, rigid material fixed in the first body member for guiding the second body member, and a channel member of thin light weight material fixed between the first body member and the guide member for defining an oil channel connected to the reservoir chamber.

Abstract: A hydraulic valve lifter is mounted in a rocker arm of a valve train assembly of internal combustion engines. The lifter includes a cylinder formed in the rocker arm, a plunger reciprocably mounted in the cylinder, a seat member securely pressed in the cylinder above the plunger and provided with an outer circumferential portion extending in a direction of the plunger, a stopper surface formed at an end surface of the outer circumferential portion for restricting an axial movement of the plunger in a direction of the seat member, and a relief recessed area formed above the stopper surface for finishing machining process of the cylinder.

Abstract: A valve driving device for an internal combustion engine including a hydraulic lifter in each rocker arm and a rocker shaft swingably supporting the rocker arms wherein a first oil passage is provided through the internal bore of the rocker shaft for supplying oil to a reservoir of the hydraulic lifter. A second oil passage is formed through a rocker support for supplying oil in the first oil passage, and an air exhaust port is provided for exhausting air intruded into the internal bore of the rocker shaft to outside.

Abstract: A hydraulic valve lifter for a variable displacement engine includes a body member, a check valve disposed within the body member for controlling a pressure chamber and a reservoir chamber, a sleeve member secured to one end of the body member, a plunger member slidably disposed in an axial bore of the sleeve member, and a solenoid valve having a valve rod for actuating the check valve. The direction of movement of the check valve is disposed at right angles to the axial direction of the body member. The direction of movement of the valve rod is the same as the direction of the movement of the check valve.

Abstract: A self-contained hydraulic lifter used in valve trains of internal combustion engines having a cylindrical body, a plunger arranged slidably therein, and a diaphragm arranged in the plunger. A metal ring is embedded in the upper portion of the diaphragm and the upper end of the metal ring is in contact with the stopper member fixed to the upper end of the plunger, thereby the sealability of the diaphragm being improved.

Abstract: The hydraulic lifter device for use in a valve train mechanism of an internal combustion engine comprises a body having a reservoir chamber of circular configuration therein, a plunger slidably positioned within the body to thereby form a leak clearance therebetween and biased by a spring in one direction, a pressure chamber formed within the plunger, and a check valve positioned between the reservoir and pressure chambers so as to allow a flow of a working fluid only into the pressure chamber from the reservoir chamber.

Abstract: A hydraulic valve lifter for variable displacement engine includes a valve housing, one-way valve disposed in the housing for controlling fluid communication between a working chamber and a reservoir, a sleeve member secured to one end of the valve housing and an axial bore therein and a plunger slidably disposed in the axial bore of the sleeve member. The outer diameter of the plunger is designed to be smaller than the inner diameter of the valve housing so that the inertia weight of the plunger may be reduced.

Abstract: A hydraulic lifter for an internal combustion engine which includes a cylindrical body installed horizontally or nearly horizontally, having an oil inlet port on the surface of the body; a plunger slidably inserted into the body; a push rod seat inserted into one end of the body in contact with the plunger, having an oil outlet port; an oil reservoir formed by the plunger and a push rod seat; a pressure chamber formed by the internal wall of the body and the end face of the plunger in the other end of the body; a hole for the oil to flow in and out of the reservoir, provided in the vicinity of the junction between the plunger and the push rod seat; a first groove provided on the other surface of the plunger forming at least one turn around the plunger, to connect the oil inlet port mounted on the body with the hole for the oil to flow in and out of the reservoir; and a second groove provided on the outer surface of the push rod seat forming at least one turn around the push rod seat, to connect the hole for t

Abstract: A self-contained hydraulic lash adjuster having a cup-shaped body and a plunger slidably disposed therein is further provided with a flexible diaphragm secured within a reservoir chamber located in the plunger with one side of said diaphragm being exposed to the atmosphere and the other side being disposed in engagement with the oil supply sealed within the hydraulic lash adjuster. An oil passage is provided in the bottom of the plunger to communicate the reservoir chamber with a pressure chamber defined between the bottom of the plunger and the bottom of the body and a one-way check valve is provided to prevent the return flow of oil through the oil passage to the reservoir. A cup-shaped cover member having apertured side walls is located in the bottom of the plunger over the oil passage to prevent the diaphragm from blocking the oil passage upon deformation of the diaphragm.