Abstract: A magnetic recording medium comprises a substrate and a magnetic recording layer formed on the substrate and having an easy magnetization axis in the perpendicular direction to the surface of the medium, characterized in that said magnetic recording layer is composed of from 75 to 90% by weight of Co, at most 15% by weight of Mo and the rest being V and unavoidable impurities.

Abstract: An electrode for electrolysis having a coating which consists esentially of 40 to 90 mole % of palladium oxide, 0.1 to 20 mole % of platinum, and 5 to 50 mole % of (Ru.sub.x Ti.sub.1-x)O.sub.2 wherein x ranges from 0.05 to 0.5, based on the total molar composition.The electrode of the present invention has excellent corrosion resistance and mechanical resistance against foams generated during electrocatalysis.

Abstract: A magnetic tape cassette has an outer peripheral rib for partitioning a part of a bottom plate, said rib being formed near the head receiving portion of an upper half casing wherein the inside portion of said bottom plate defined by said outer peripheral rib is tapered to have the thickness of said outer peripheral rib at the connecting point of said bottom plate to said outer peripheral rib.

Abstract: A magnetic recording medium is provided which has smooth and stable running performances and is free of "squeal" phenomenon, especially in an environment of high temperature and high humidity. A highly viscous silicone oil having a viscosity of 100,000 centistokes or more is incorporated in combination with a higher fatty having a melting point of 44.degree. C. or more into a magnetic coating layer of the magnetic recording medium. Such silicone oil is represented by the general formula: ##STR1## wherein R is CH.sub.3, R' is CH.sub.3, C.sub.6 H.sub.5 or F and n is a number which determines a viscosity thereof. Such higher fatty acid is selected from lauric acid, myristic acid, palmitic acid, stearic acid, arachic acid, behenic acid and the like.

Abstract: A magnetic recording medium having a magnetic layer comprising a magnetic powder and a resin binder, which is characterized by that the magnetic layer contains an ethylene trifluoride chloride polymer of a low degree of polymerization and a fatty acid ester.

Abstract: A magnetic recording medium obtained by kneading ferromagnetic particles with a binder composition and coating on a non-magnetic substrate, which is characterized by that the binder composition comprises a copolymer comprising 80-89% of vinyl chloride, 5-10% of vinyl acetate and 6-10% of vinyl alcohol and a polyurethane elastomer.

Abstract: The new structure of a ferrite core for the use of a power transformer and/or a choke coil has been found. The core is assembled by a pair of identical core halves, and each core half comprises (a) a circular center boss (6), (b) a pair of outer walls (7, 8) positioned at both the sides of said boss for mounting a coil, (c) a pair of base plates (9, 10) coupling said center boss and said outer walls, (d) each of the outer walls being substantially rectangular with an external linear wall and an inner curved wall, (e) the core half being symmetrical with regard to the first plane including a center axis of said boss and being parallel with the external linear walls of said outer walls, (f) a concaved opening (R) being provided between said base plates in the first side of the core half with regard to the reference plane which includes a center axis of said boss and is perpendicular to said first plane, (g) the length (B.sub.

Abstract: A magnetic recording medium comprises a substrate coated with a magnetic layer comprising a magnetic powder and a fine titanium oxide powder having a particle diameter of at least 0.4.mu. and at least one other fine hard non-magnetic powder.

Abstract: A magnetic recording medium, consisting of a base coated with a magnetic coating material, uses as a binder a polyurethane resin having a metal sulfonate group, a vinyl chloride-vinyl acetate copolymer containing not less than 8% vinyl alcohol on the basis of the total binder weight, and nitrocellulose, in which magnetic particles are dispersed. The binder may contain an isocyanate compound as a crosslinking agent for added particle dispersibility.

Abstract: A magnetic tape cassette has a guard panel pivotally supported in the front of the upper half casing to be opened and closed in which a guide groove is formed near a hole for receiving a pin of the guard panel to guide the pin into the hole.

Abstract: A magnetic recording medium having two coated magnetic layers of a first magnetic layer and a second magnetic layer on a non-magnetic substrate. The first magnetic layer has a coercive force of 400 to 590 Oe and a thickness of 2.1 to 2.8.mu. and said second magnetic layer has a coercive force of 590 to 800 Oe and a thickness of at least 2.1.mu..

Abstract: A pivotal-shaft receiving hole formed in a thin-walled one-piece molded product for receiving a pivotal-shaft of another molded product is formed by a boss formed in one piece with the thin wall of said molded product and the pivotal-shaft receiving hole having a length greater than that of said pivotal-shaft which is formed through said thin wall and said boss.

Abstract: A magnetic powder for a magnetic recording medium which is a cobalt-adsorbed magnetic iron oxide having a coercive force of 1000 Oe or more and a ratio of a coercive force at -196.degree. C. to a coercive force at room temperature of 3 or less.

Abstract: A magnetic recording medium comprises a substrate coated with a magnetic composition comprising a cobalt adsorbed iron oxide powder with a phosphoric ester type anionic surfactant at a ratio of 2 wt. % or more and a binder at a ratio of said iron oxide powder to said binder of 4 or more.A magnetic recording medium has a coercive force Hc of 950 to 1200 Oe and a residual magnetic flux .phi..sub.r of 0.35 to 0.6 maxwell.

Abstract: A magnetic recording medium comprises a combination of two or more kinds of fine abrasive powders having different true specific gravities in a magnetic layer containing a magnetic powder.

Abstract: A magnetic recording medium is composed of a base and a magnetic coating which comprises a binder and a magnetic powder dispersed therein. The magnetic powder, in turn, contains a nonmagnetic powder having an average particle size of not more than 2 .mu.m and a hardness of at least 6 on Mohs scale, in an amount of 1-20% on the basis of the weight of the magnetic powder, and the binder contains a resin such as polyester resin having a group expressed by the formula --SO.sub.3 M where M is monovalent metal such as Na.

Abstract: A magnetic tape cassette comprising a magnetic tape and two reels for winding said magnetic tape in the casing assembly has a through hole for determining the clamping position formed in the position corresponding to one of reel driving ribs for one reel and another through hole formed in the position between the adjacent ribs for the other reel.

Abstract: A magnetic recording medium having a magnetic layer on one surface of a substrate and a back layer on the other surface, which is characterized by that the back layer is that formed by dispering a filler such as carbon black, graphite, SiO.sub.2, TiO.sub.2, Al.sub.2 O.sub.3,Cr.sub.2 O.sub.3, SiC, CeO.sub.2, CaCO.sub.3, zinc oxide, geothite, .alpha.Fe.sub.2 O.sub.3, talc, kaolin, CaSO.sub.4, boron nitride, Teflon powder, graphite fluoride, molybdenum disulfide, zirconia etc. In a binder containing a radiation sensitive curable resin such as acryl-modified vinyl chloride - vinyl acetate - vinyl alcohol copolymer, acryl-modified polyurethane elastomer, acryl-modified polyester resin, etc. and curing it prior to rolling. The obtained back layer is very tough and can reduce the number of dropouts.

Abstract: A magnetic recording medium comprises a thin metallic magnetic layer on a non-magnetic substrate wherein said thin metallic magnetic layer is made of cobalt, nickel and chromium.

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.