摘要:
Disclosed is a thin alloy ribbon prepared by the strip casting method as an intermediate for the preparation of a sintered rare earth-based permanent magnet or in particular, a neodymium/iron/boron-type permanent magnet. The thin alloy ribbon is characterized by a specific volume fraction of the four-phase coexisting region consisting of the &agr;-iron phase, R-rich phase, RxT4B4 phase and R2T14B phase each having an average grain diameter in a specified range and a specific volume fraction of the chill crystalline phase. When these requirements are satisfied, the sintered rare earth-based permanent magnet prepared from the thin alloy ribbons can be imparted with improved magnetic properties and high sintering density even without increasing the sintering temperature.
摘要:
A high-strength low-thermal-expansion alloy consisting of, by weight, 0.06 to 0.50% C, 25 to 65% in total of one or both of 65% or less Co and less than 30% Ni, and balance of Fe as a main component, other optional elements and unavoidable impurities, and having a primary phase of austenite phase and martensite phase induced by working. A wire is made from the alloy.
摘要:
A stepping motor driving apparatus for a camera includes 1-2 phase excitation type stepping motors and a drive controller for driving and stopping the stepping motors so that the driven stepping motors are stopped always at a detent position.
摘要:
An FE--Ni--Cr-base superalloy consists essentially of, by weight, up to 0.15% C, up to 1.0% Si, up to 3.0% Mn, 30 to 49% Ni, 10 to 18% Cr, 1.6 to 3.0% Al, one or more elements selected from Groups IVa and Va whose amount or total amount is 1.5 to 8.0%, the balance being Fe, optionally, minor amounts of other intentionally added elements, and unavoidable impurities. The optional other elements which can be intentionally added to or omitted from the alloy include Mo, W, Co, B, Mg, Ca, Re, Y and REM. The superalloy is suitable for forming engine valves, knitted mesh supporters for exhaust gas catalyzers and the like, and has excellent high-temperature strength and normal-temperature ductility after long-time heating, as well as sufficient oxidation resistance properties for these uses.
摘要:
A refrigeration cycle including a compressor, an indoor heat exchanger, an expansion, an outdoor heat exchanger and a six-way change-over valve having a refrigerant passage through which refrigerant flows in a refrigerant circuit comprising the compressor, the indoor heat exchanger, the expansion and the outdoor heat exchanger, wherein the six-way change-over valve serves to selectively switch the refrigerant passage so that the refrigerant passing in the indoor and outdoor heat exchangers flows in the same direction at any time when the refrigerant cycle is switched to a cooling operation cycle and to a heating operation cycle.
摘要:
A tab tape bonder including a bonding device which bonds semiconductor chips, etc. to a tab tape, a first roller driver which feeds the tab tape into the bonding device, a detector which detects holes or perforations formed in the tab tape fed by the first roller driver, and a controller which controls the feeding pitch of the tab tape by the first roller driver in accordance with the detection results obtained by the detector.
摘要:
The centrifugal fluidizing granulator for powder coating granulation has a sensor for detecting changes of viscosity of the growing particles by means of a load cell or a displacement detector; and output signal of the sensor is compared with the data stored in a memory contained in a control unit which determines whether the growing particles are in their wetted state or dried state. The control unit controls the spraying of the liquid and the dispersion of the guest powder based on the result of the comparison.
摘要:
Object of the present invention is to provide an apparatus in which water, oil or grease are maintained on an ordinary using surface in a stable condition by preventing the water, the oil or the grease from moving to other surface than the ordinary using surface.The present invention relates to an apparatus using water, oil, or grease, especially, the apparatus in which surroundings of the surface maintaining the water, the oil, or the grease are reformed by fluorinated compound. In accordance with the present invention, seeping out of the water, the oil, or the grease are prevented, the water, the oil, or the grease are certainly held at the using surface, and stable performance is maintained for a long time.
摘要:
A tab tape clamping mechanism including an upper clamper and a lower clamper used in bonding machines simplified in shape, easily manufactured and replaced, with almost no bending or twisting in the lower clamper is accomplished by making the lower clamper with a lower clamper plate and a lower clamper holder which holds the lower clamper plate via vacuum suction.
摘要:
An electrophotographic lithograph printing plate material having an enhanced sensitivity to laser rays, an excellent heat resistance and a low dark decay comprises an electroconductive, water-resistant substrate and an electrophotographic layer comprising a photoconductive zinc oxide, a resinous binder and a sensitizing dye material which comprises at least one compound (A) of the formula (I) and at least one compound (B) of the formula (II): ##STR1## wherein each of A.sub.1 and A.sub.2 represents a C.sub.5-7 polymethine group non-substituted or substituted with at least one substituent, for example, --Cl, the substituted polymethine group may have a cyclic structure, for example, of: ##STR2## each of from B.sub.1 to B.sub.4 is a divalent non-substituted or substituted, benzene or naphthalene group, each of from X.sub.1 to X.sub.4 is a S, Se, or O atom or a --C(CH.sub.3).sub.2 -- group, each of from R.sub.1 to R.sub.4 is a C.sub.1-5 alkyl group, each of M.sub.1 and M.sub.5 is a metal atom, organic base or hydrogen atom, each of Y.sub.1 and Y.sub.2 is an anion, and m and n is zero or 1 but when n= 1, m= 1 and when n= 0, m= 0 and --R.sub.3 COO group adjacent to the (M.sub.1).sub.m group in the formula (II) is anionic, the weight ratio of the compound (A) to the compound (B) being 3:1 to 20:1.