Abstract: Disclosed herein is a magnetic powder which can provide a bonded magnet having excellent magnetic properties and having excellent reliability especially excellent heat stability. The magnetic powder is composed of an alloy composition represented by Rx(Fe1-yCoy)100-x-z-wBzNbw (where R is at least one kind of rare-earth element, x is 7.1-9.9 at %, y is 0-0.30, z is 4.6-6.9 at %, and w is 0.2-3.5 at %), the magnetic powder being constituted from a composite structure having a soft magnetic phase and a hard magnetic phase, wherein the magnetic powder has magnetic properties in which, when the magnetic powder is formed into an isotropic bonded magnet having a density &rgr; [Mg/m3] by mixing with a binding resin and then molding it, the maximum magnetic energy product (BH)max[kJ/m3] of the bonded magnet at the room temperature satisfies the relationship represented by the formula (BH)max/&rgr;2[×10−9J·m3/g2]≧2.

Abstract: A read control system and a write control system are controlled separately in such a manner that a level of read power to be used for reading out information from an optical disk and a level of write power to be used for writing information onto the optical disk approach their respective target values. Automatic pre-calibration process is performed on a relationship between a control input to and a control output from the write control system, in order to provide an optimum write power level from the very beginning of recording. The above-mentioned automatic pre-calibration process includes comparing a current control input to the read control system with a control input to the read control system in the last calibration prior to initiation of recording operations and causing the write control system to execute the automatic calibration of the relationship only when a difference between the compared control inputs is greater than a predetermined reference value.

Abstract: Disclosed herein is a magnetic powder which can provide a bonded magnet having excellent magnetic properties and having excellent reliability especially excellent heat stability. The magnetic powder is composed of an alloy composition represented by Rx(Fe1-yCoy)100-x-z-wBzAlw (where R is at least one kind of rare-earth element, x is 7.1-9.9 at %, y is 0-0.30, z is 4.6-6.9 at %, and w is 0.02-1.5 at %), the magnetic powder being constituted from a composite structure having a soft magnetic phase and a hard magnetic phase, wherein the magnetic powder has magnetic properties in which, when the magnetic powder is formed into an isotropic bonded magnet having a density &rgr; [Mg/m3] by mixing with a binding resin and then molding it, the maximum magnetic energy product (BH)max[kJ/m3] of the bonded magnet at the room temperature satisfies the relationship represented by the formula (BH)max/&rgr;2[×10−9J·m3/g2]≧2.

Abstract: Disclosed herein is a magnetic powder which can provide a magnet having excellent magnetic properties and having excellent reliability especially excellent in heat stability. The magnetic powder is composed of an alloy composition represented by Rx(Fe1-yCoy)100-x-z-w-vBzAlwVv (where R is at least one kind of rare-earth element, x is 7.1-9.9 at %, y is 0-0.30, z is 4.6-6.9 at %, w is 0.02-1.5 at % and v is 0.2-3.

Abstract: In order to secure stable magnetic properties in a magnet alloy ribbon obtained by a melt rapid cooling method, and obtain excellent magnetic properties and corrosion resistance in a bonded magnet, the area ratio of dimple-like recesses (22) present in the surface (roll surface) of the alloy ribbon in contact with a cooling roll during solidification is defined. As a result, an alloy ribbon for a magnet having stable magnetic properties can be obtained. The use of a powder obtained by grinding such an alloy ribbon enables formation of a bonded magnet having excellent magnetic properties and corrosion resistance.

Abstract: A high-performance R--Fe--B permanent magnet being radially anisotropic can be produced by carrying out hot bending of a plateshaped magnet material produced by casting and hot working, to mold it into an arc shape; the cracks to be generated during the bending can be decreased by deciding such bending conditions as the amount of strain, the strain rate, the working temperature, as well as the structure and the composition of the alloy. Furthermore, by optimizing the conditions for heat-treatment and by using an oxidation resistance coating lubricant, an arc shape magnet of high performance and a low cost can be produced under stabilized conditions.

Abstract: A gas turbine combustor including a first-stage combustion chamber being arranged to serve as a premix chamber for a second-stage combustion chamber and an auxiliary burner provided in the first-stage combustion chamber and arranged to effect, when fired, combustion and holding of a flame in the first-stage combustion chamber and to effect, when extinguished, feed a flame from the first-stage combustion chamber to the second-stage combustion chamber.

Abstract: A gas turbine combustor including a first-stage combustion chamber being arranged to serve as a premix chamber for a second-stage combustion chamber and an auxiliary burner provided in the first-stage combustion chamber and arranged to effect, when fired, combustion and holding of a flame in the first-stage combustion chamber and to effect, when extinguished, feed a flame from the first-stage combustion chamber to the second-stage combustion chamber; and a method of driving the gas turbine combustor including a step of preparing the auxiliary burner in the first stage combustion chamber, the auxiliary burner being sparked when said combustion is fired, and causing the first-stage combustion camber to serve as the premixing chamber for the second-stage combustion chamber by extinguished the auxiliary burner.

Abstract: A method and an apparatus for burning gaseous fuel, the composition of the fuel varying at times, wherein; main injection ports and sub-injection ports are arranged in such positions that the fuel injected through the sub-injection ports may be ignited by a flame formed from the fuel injected through the main injection ports; fuel passes are provided or conducting the gaseous fuel separately to the two groups of injection ports; and control valve is provided for adjusting the ratio of the fuel flow to the main injection ports to the fuel flow to the sub-injection ports; whereby the proportion of the fuel to be injected through the main injection ports is increased as the rate of burning the gaseous fuel increases.

Abstract: An engine load torque controller detects the engine output torque variation as an engine speed variation and controls the load torque of an auxiliary machinary driven by the engine basing on the detected speed variation, thereby diminishing the vibration of the engine.

Abstract: A method and an apparatus for burning gaseous fuel, the composition of the fuel varying at times, wherein; main injection ports and sub-injection ports are arranged in such positions that the fuel injected through the sub-injection ports may be ignited by a flame formed from the fuel injected through the main injection ports; fuel passes are provided for conducting the gaseous fuel separately to the two groups of injection ports; and a control valve is provided for adjusting the ratio of the fuel flow to the main injection ports to the fuel flow to the sub-injection ports; whereby the proportion of the fuel to be injected through the main injection ports is increased as the rate of burning the gaseous fuel increases.

Abstract: A lighting apparatus has a casing pivotally separable along an intermediate parting line so as to facilitate various operations such as assembly, replacement, repair and checking of components contained therein. These components can be a light source, a projector lens, a variable masking device and a cooling fan, for example. Additionally, displaceable pivots are provided along the parting line for pulling a pivotal mechanism into the casing as respective casing halves are coupled to each other. The pivots can be displaced as the casing is opened and closed so that not only the opening and closing operation can be smoothly performed but also the external appearance of the apparatus is never injured since the pivotal mechanism is not exposed and no gap is developed along the parting line upon completely coupling the casing halves.

Abstract: An apparatus for transferring a small amount of fluid has at least one series of vibration pump units each having a fluid transfer pipe designed to perform a respirating action by the operation of a vibrator which vibrates in response to application of a high-frequency voltage. The fluid transfer pipes are connected in series via fluid diodes which serve to enable the fluid to flow only in one direction, while resisting reversing of the fluid, so that the fluid is transferred in one direction through the successive fluid transfer pipes. In order to minimize the pulsation of the fluid pressure at the downstream end of the apparatus, the vibrators of the pump unit are excited with predetermined phase differentials. Additional fluid diode is connected to the outlet end of the most downstream pump unit.

Abstract: An apparatus for transferring a small amount of fluid has at least three vibration pump units which are connected in series. Each vibration pump unit has a fluid transfer pipe, a vibrator mounted on the outer peripheral surface of the fluid transfer pipe and adapted to cause the transfer pipe to vibrate in a respiring manner, an inner peripheral electrode on the inner peripheral surface of the vibrator, an outer peripheral electrode on the outer peripheral surface of the vibrator, a high-frequency voltage applying device for applying a high-frequency voltage between the inner peripheral electrode and the outer peripheral electrode thereby causing the vibrator to vibrate in respiring manner, and a fluid diode exhibiting resistance to reversing of the fluid and connected to the fluid outlet of the fluid transfer pipe in such a manner as to permit the fluid to be discharged from the fluid pipe. The adjacent vibration pumps operate with a predetermined phase difference therebetween.

Abstract: A motor-driven compressor used as a compressor or high-pressure gas generator for a refrigerating cycle, in which the output torque of the electric motor for driving the compressor is controlled so as to make the output torque agree with the load torque required for performing compression in any revolutional angular position of the driving main shaft to thereby reduce revolutional torsional vibrations caused by disagreement between the load torque and the output torque.

Abstract: The present invention relates to a rainbow image projector adapted to project a vivid rainbow image from a relatively small light source onto walls of a stage, a store, places for various parties, and like. Specifically, light rays emitted from the linear incandescent light source are converted by a cylindrical condenser lens into parallel light rays which are, in turn, obliquely incident on a triangular prism over whole area of its first refraction plane. Thus, it is possible to project a vivid rainbow image of a large curvature radius from the small light source of small power consumption and heat generation. A housing containing therein said linear light source, cylindrical condenser lens and prism and provided with a projection window is inclination-adjustably mounted an inclination adjustment screw on a support leg so that a direction in which the rainbow image is projected may be variable.

Abstract: A heat exchanger, e.g. that used in an air-conditioner, having a plurality of spaced plate-fins with narrow distance in parallel and a plurality of heat transfer pipes passing through said fins, said fins being coated with an aqueous coating composition comprising 100 parts by weight of a resin composition for water paint in solids content, 5 to 95 parts by weight of a surface active agent and 5 to 65 parts by weight of synthetic silica and baked at a temperature of 120.degree. C. to 200.degree. C. for 10 to 40 minutes to give a coating film of 3 to 20 .mu.m, has excellent hardness and corrosion resistance without damaging hydrophilic properties.

Abstract: A refrigerating apparatus comprises two refrigerant circuits connected in a parallel fashion which include a common condenser. An evaporating temperature in an evaporator of one refrigerant circuit is set to a relatively high temperature compared with that of an evaporator of the other refrigerant circuit, so that a two-temperature evaporation type refrigerating apparatus is formed and a compressor of one refrigerant circuit can be intermittently driven for each predetermined time period in a forced manner. In a defrosting mode, the condenser is made to operate as an evaporator, whereby the evaporator included in the other refrigerant circuit is defrosted.

Abstract: A variable mask device for use with an illuminator comprising a projection window, a plurality of variable mask plates for optionally varying the size and shape of the projection window and means operatively connected to said variable mask device for inclining said mask device with respect to the projection axis within a predetermined angular range. Means are also provided for rotating the mask device around the projection axis.

Abstract: A refrigerating apparatus including a first compressor, a condenser, a first pressure reducer a first evaporator, a second pressure reducer and a second evaporator connected together by lines to form a refrigerating circuit for a refrigerant to flow therethrough, wherein a second compressor is connected at its suction side to the second pressure reducer for receiving gaseous component of refrigerant from the first evaporator and connected at its discharge side to the line between the first compressor and the condenser. An evaporative pressure control valve may be mounted in the line between the first evaporator and the second pressure reducer or the line between the second pressure reducer and the second evaporator. A bypass line mounting an electromagnetic valve may connect the line between the first evaporator and the second pressure reducer to the line between the second pressure reducer and the second evaporator.