Abstract: A magnetic recording medium has plural magnetic layers on a non-magnetic substrate. The magnetic particles are orientated in substantially the same tilt direction for major axes of the particles in each magnetic layer and in cross tilt directions for major axes of the particles in the adjacent magnetic layers.

Abstract: A lighting apparatus for a discharge lamp in which said lighting apparatus (4) is coupled in series with a discharge lamp (3), said lighting apparatus (4) is composed of a capacitor with a ferroelectric dielectric material having main component Barium-titanate (BaTiO.sub.3), said capacitor satisfying the impedance ratio of the first impedance (Z.sub.1) which is obtained by measuring current for alternate voltage of 5 volts, to the second impedance (Z.sub.2) which is obtained by measuring current for alternate voltage of 500 volt/mm, being less than 1/10 (Z.sub.2 /Z.sub.1 is less than 1/10), thus, the size of the lighting apparatus is small, and the power loss in the same is reduced.

Abstract: An optical recording system for high recording density has been found for a system which uses a heat-meltable recording medium which is melted by illuminating the same with a laser beam according to the data to be stored. The spacing between adjacent pits on the recording medium is less than the diameter of the laser beam, and then, each pit overlaps partially with the succeeding pit on the recording medium. In spite of the overlap of the pits, the recorded data can be read out by reading only the non-overlapped portion of the bank of a pit. The spacing between the pits is preferably in the range between 1/3 and 1/2 of the diameter of the laser spot so that the recording density is at least two times as high as a prior recording medium.

Abstract: In a magnetic recording medium made by applying a non-magnetic undercoat and a magnetic top coat on a base, the undercoat comprises a radiation-curable coating material which contains a compound with a molecular weight of not less than 400, having one type of double bond selected from among acrylic, allylic, and maleic double bonds, the undercoat being formed by exposure to radiation. Specifically, the undercoating material contains at least two types of compounds selected from (A) those having a molecular weight of over 5000, preferably over 8000 and having two or more double bonds selected as above, (B) those having a molecular weight of 400 or more but less than 500, preferably in the range of 600 to 3000, and two or more double bonds selected as above, and (C) those having a molecular weight of less than 400 and one or more double bonds selected from among acrylic, allylic, maleic, and styrenic double bonds.

Abstract: A magnetic recording medium comprises cobalt as a main component and at least one of zinc, rhodium and iridium as an additional component of an alloy of a magnetic layer.

Abstract: A magnetic carrier powder composed essentially of particles of a ferrite having a composition represented by the formula(MO).sub.100-x (Fe.sub.2 O.sub.3).sub.xwhere M is Mg, Mn, Zn, Ni, a combination of Mg in an atomic ratio of at least 0.05 with at least one metal selected from the group consisting of Zn, Cu, Mn and Co, a combination of Mn in an atomic ratio of at least 0.05 with at least one metal selected from the group consisting of Zn, Cu, Mg and Co, or a combination of Ni in an atomic ratio of at least 0.05 with at least one metal selected from the group consisting of Zn, Mg, Mn, Cu and Co, and x is greater than 53 molar %.

Abstract: A current restriction device for alternate circuit with small size, low producing cost and low power loss has been found by using a ferro-electric body with rectangular hysterisis characteristics. Said device is used for instance as a ballast for restricting current in a fluorescent lamp. Said ferro-electric body has main component of B.sub.a T.sub.i O.sub.3, additive of S.sub.r or P.sub.b for substitution of part of B.sub.a and Z.sub.n or S.sub.n for substitution of part of T.sub.i, and a mineralizer of M.sub.n o or C.sub.r2 O.sub.3. The voltage-current characteristics of said ferro-electric body show non-linearity that the impedance ratio (Z.sub.2 /Z.sub.1) of the impedance Z.sub.2 measured with alternate field of 500 volts/mm to the impedance Z.sub.1 measured with alternate field of 5 volts/mm is less than 1/10.

Abstract: In a known hot melt screen printing machine the printing ink is heated by an electrical current which is conducted through a stainless steel mesh of a screen plate. In the known machine, the printing accuracy is not good, mainly because of variation of tension and thermal expansion of the mesh.The mesh according to the present invention consists of insulating material fibers and an electroless plating layer formed on the fibers. The plating layer preferably consists of a nickel phosphorous alloy. A squeezing means for forcing the printing ink to pass through a printing pattern and/or a printing base for mounting an article to be printed are provided with a heating means. One of the advantages of the present invention is a high printing accuracy.

Abstract: An ultrasonic atomizing device includes an ultrasonic oscillator system and a housing. The oscillator system comprises a conic-frustum shaped coupler having a projection at the central portion of its large cross-sectional portion, a circular piezoelectric plate provided with electrode plates and having a center hole through which being penetrated the projection, and a resonance plate to be stimulated into vibration. On the other hand, the housing includes a cylindrical wall, a circular cover fixed at one end of the cylindrical wall and a ring shaped cover fixed at the other end of the cylindrical wall. A circular hole of the ring shaped cover accepts and flexibly supports the coupler through a ring shaped rubber packing. The surface of the oscillator is sealed with the housing by fixing the circular cover to the projection by means of screws, in order to prevent invasion or adhesion of liquid to the surface of the oscillator.

Abstract: A magnetic toner or ink is used in an electrophotography. It comprises a resinous component and a magnetic having a spinel structure and having the formula ##EQU1## wherein M represents at least one of Mn, Ni, Co, Mg, Cu, Zn or Cd; and x is in a range of 0.5 to 1 and y is in a range of 0.1 to 0.571.

Abstract: A tape guide for magnetic tape cartridge including a main body of the tape guide made of a synthetic resin material, the main body of the tape guide having a multitude of finely depressed and elevated continuous rectangular portions on and around the outer surface thereof, and a metal layer formed on the outer surface of the tape guide main body.

Abstract: A magnetic tape cassette provided with a separating sheet interposed between a magnetic recording tape and a half casing. The separating sheet is provided with first protrusions projecting toward the tape and second protrusions projecting toward the half casing.

Abstract: A magnetic recording medium which has dynamic range (I) of 70 dB or more and dynamic range (II) of 45 dB or more in control of a thickness of a magnetic layer and magnetic characteristics wherein said dynamic range (I) is given as a difference between an output at 3% input level of third harmonic wave output at a wavelength of 237.5 .mu.m in the optimum bias recording by a head having a recorded width of 1 to 1.1 mm based on an output of the original signal and a reproduced output calibrated by auditory sense calibration at non-signal recording in the bias and said dynamic range (II) is given as a difference between a saturated output at a wavelength of 4.75 .mu.m under the same condition and the reproduced output calibrated by the A-curve calibration at non-signal recording in the bias.

Abstract: A combination of feeding and take-up reels in a magnetic tape cartridge comprises a feeding reel constructed with an upper flange, a lower flange, a reel drum for connecting said upper and lower flanges, and a center boss projecting from the top surface of said upper flange and a take-up reel constructed with an upper flange, a lower flange, a reel drum having a larger breadth than that of the reel drum in said feeding reel and for connecting said upper and lower flanges, and a center boss projecting from the top surface of said upper flange and being colored in a different color from that of the center boss of said feeding reel.

Abstract: A case combination for microcassette includes a first inside case for microcassettes which is capable of enclosing the microcassette in two and a second outside case for microcassettes which is capable of enclosing said first inside case for microcassettes in two and specified in the same outline dimensions as the case for compact cassettes.

Abstract: A high frequency coil including an inductance device formed by fitting a pair of electrode caps at both ends of a ferrite magnetic core wound by a winding on a peripheral surface of the core; a heat resistant electric insulating coated layer formed on the peripheral surface of the inductance device and a heat resistant electric insulating resilient tube fitted onto the peripheral surface of the coated inductance device.

Abstract: A magnetic tape clamping device of a reel hub is formed by a clamping piece having projections at the both ends and a concave portion formed on the periphery of the reel hub in which an undercut portion is formed in each side wall of the concave portion so that an increased clamping force is applied between the projections of the clamping piece and legs formed by undercut portions when a magnetic tape is pulled.

Abstract: A magnetic recording medium has a magnetic recording layer comprising from 75 to 90% by weight of Co and up to 5% by weight of Cr, the rest being V. The magnetic recording layer has an easy magnetization axis in the perpendicular direction to the layer surface. The magnetic recording medium is prepared by sputtering a composition of Co-V-Cr onto a substrate at an industrially feasible deposition speed of at least 3000 .ANG./min to form the above mentioned recording layer on the substrate.

Abstract: In a magnetic recording medium having a base, a coating for magnetic recording formed on one side of the base, and a back coating of a nonmagnetic powder dispersed in a binder containing a thermosetting resin and formed on the other side, the back coating contains a fatty acid and/or a fatty ester.