Abstract: A read device for reading magnetic data stored in a plane magnetic recording medium comprises a magnetic head for reading magnetic data stored in a rotatable flexible plane magnetic recording medium and a pad pushing a rear surface of the magnetic recording medium to a direction of the magnetic head so as to contact the front surface of the magnetic recording medium with the magnetic head, and means for adjusting a projected distance of the pad to the magnetic recording medium.

Abstract: An alkali hydroxide is added to an aqueous solution of ferrous salt to form a precipitate and a part of the solution is separated to control a ratio of an anion to a ferrous component to less than 1 and the ferrous component is oxidized to acicular goethite by bubbling air through the supernatant and precipitate.

Abstract: Disclosed herein is a high gradient magnetic separation (HGMS) apparatus, in which ferromagnetic metal wool is used to separate, for example, iron powders from water. Due to the high magnetic gradient around the metal wool, the separation of the iron powders takes place. Because of an improvement of the metal wool used in this HGMS apparatus, iron powders and the like can be collected at a high collecting efficiency, and the renewal operation of the metal wool can be performed in a short period of time. The improvement according to the invention resides in employing an amorphous metal alloy for the metal wool.

Abstract: A magnetic recording medium which has a protective layer on a magnetic recording layer coated on a substrate and said protective layer comprises polyurethane and nitrocellulose in which isopropyl alcohol originally present has been replaced by a resin selected from the group consisting of polyurethane resins, polybutadiene resins, butadiene-acrylonitrile copolymers, vinyl chloride-vinyl acetate-vinyl alcohol copolymers, vinyl chloride-vinyl acetate copolymers, vinyl chloride-vinylidene chloride copolymers, vinylidene chloride-acrylonitrile-copolymers, vinyl acetate resins, epoxy resins, phenoxy resins, polyvinylbutyral resins, polyvinyl formal resins and polyester resins.

Abstract: An improved electrode for living body is proposed which is excellent in the stability and reliability in detecting and transmitting the electric signals generated in a living body by the physiological electric phenomena such as electrocardiographic, electromyographic and electroencephalographic signals.The electrode of the invention is characterized by the material which is mainly a titanium hydride or a mixture of a titanium hydride with silver chloride optionally combined with a metal salt with basicity and a carbon powder, e.g. graphite.

Abstract: A sectional rack comprises a plurality of modular rack units for holding articles, and pivotal joint means for connecting the rack units together so that the units can pivotally swing relative to one another. Each of the rack units comprises oblong top and bottom plates having holes in both end portions, a post for connecting the two plates together by fitting at both ends in the holes of the plates, and top and bottom fasteners for securing and fastening the post to the plates. The pivotal joint means comprises oblong top and bottom connecting plates having pivot holes formed in both end portions, stepped posts having their ends extending into the pivot holes of the two connecting plates to connect them pivotally to the top and bottom plates of the rack units, and top and bottom fasteners for securing and fastening the posts to the top and bottom plates of the rack units. The top fasteners have a recess each and the bottom fasteners a projection each adapted to mate with the recess.

Abstract: Disclosed is a magnetic head used for a vertical magnetizing system comprising a core having a pair of leg portions and an auxiliary magnetic pole which is arranged so as to face both leg portions. A closed magnetic path is formed by the core and the auxiliary magnetic pole. A sharp edge is formed at each end of the leg portions. A magnetic recording medium passes through the gap between the sharp edges and the auxiliary magnetic pole. When the magnetic recording medium passes through the gap, a high density magnetic recording operation is performed by the magnetic field produced by each sharp edge. Moreover, the recording operation can be effectively carried out due to the closed magnetic path and the recording magnetic field magnetized on the magnetic recording medium can be read out by using the same magnetic head as the magnetic head which is used for the recording operation.

Abstract: A method of manufacturing a ferromagnetic metal powder characterized by continuously drying a slurry of ferromagnetic metal powder formed by wet reduction, in a non-oxidizing gas atmosphere, and subsequently continuously heat-treating the dried ferromagnetic metal powder in a non-oxidizing gas atmosphere. The continuous method prevents the ferromagnetic metal powder from being exposed to excess oxygen to enhance the magnetic properties of the ferromagnetic metal powder. Also, the production efficiency is enhanced.

Abstract: A novel ceramic composition exhibiting a solid solution structure of Pb(Fe.sub.1/2 Nb.sub.1/2)O.sub.3 --Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3, can be sintered at a low sintering temperature; have a high insulation resistance; have a relatively high dielectric constant in the high dielectric type ceramic dielectrics, and; have a low dielectric loss.A particular amount of the additives, i.e., pb(Mn.sub.1/2 W.sub.1/2)O.sub.3, Pb(Mn.sub.1/3 Nb.sub.2/3)O.sub.3, MnO, Pb(Mn.sub.1/3 Ta.sub.2/3)O.sub.3 Li.sub.2 O, Cr.sub.2 O.sub.3 and CeO.sub.2, is added into the composition mentioned above.

Abstract: A novel ceramic composition exhibiting a solid solution structure of Pb(Fe.sub.1/2 Nb.sub.178 )O.sub.3 -Pb(Mg.sub.1/3 Ta.sub.2/3)O.sub.3, can be sintered at a low sintering temperature; have a high insulation resistance; have a relatively high dielectric constant in the high dielectric type ceramic dielectrics, and; have a low dielectric loss.A particular amount of the additives, i.e., Pb(Mn.sub.1/2 W.sub.1/2)O.sub.3, Pb(Mn.sub.1/3 Nb.sub.170 )O.sub.3, MnO, Pb(Mn.sub.1/3 Ta.sub.170 )O.sub.3, Li.sub.2 O, Cr.sub.2 O.sub.3 and CeO.sub.2, is added into the composition mentioned above.

Abstract: A method of doping IIb or VIb group elements into a phosphide semiconductor comprising the steps of adding organic compounds of IIb group elements or hydrides of VIb group elements to a gas containing boron compounds selected from the group consisting of boron hydrides and boron halides and phosphorus compounds selected from the group consisting of phosphorus hydrides and phosphorus halides, in a ratio of 0.05-50 mol of said IIb group organic compounds or 10.sup.-4 -10 mol of said VIb group hydrides per mol of said boron compounds, and conducting vapor phase growing of the boron phosphide semiconductor at a growing temperature between about 850.degree. and 1100.degree. C.

Abstract: Disclosed is the addition of Nb, V, Ta or Zr to the ternary alloy of R (rare earth)-Co-Cu for permanent magnet materials, to thereby provide the permanent magnets with increased coercive force, residual magnetization and energy product. The additional elements enables employment of such Cu and Fe contents of the alloy as less than 10% and more than 6%, respectively. These percentages were avoided in the prior art to prevent the reduction of Br and Hc, respectively.

Abstract: A thermal printing head for printing alphanumeric characters on a thermally-responsive medium, the head being faced with a pattern of heat generating "dot" elements electrically insulated from one another and having conductive leads, with means for connecting the leads selectively to a source of electric current. The heat generating elements are formed of a film of boron phosphide. Preferably the leads are also formed of boron phosphide, integral with the elements, but "doped" to secure a high degree of conductivity.

Abstract: Catalysts for purification of exhaust gases from internal combustion engines which are a mixture of aluminum oxide, calcium oxide and one or more of the elements platinum, palladium and rhodium, and method for their use.

Abstract: An electromagnet for degaussing a magnetic head and which includes a yoke having a gap and one or more coils wound thereon is characterized by the middle portion of the yoke face, at and adjacent to said gap, being wider than the magnetic tape that passes by the magnetic head, and by the side portions of said yoke face, away from said gap, being narrower than the tape.

Abstract: A tape cassette comprises a cover for covering a wound tape which comprises a polar member mounted on a wall of the cover and a coil spring fitted to the polar member. The polar member has a narrow width slit at the free end and a wide width slit adjacent to the narrow width slit at the side of the fixed end and one end of the coil spring is inserted in to the wide width slit through the narrow width slit and the other end of the coil spring is contacted with a case body.

Abstract: An electrode for use in electric prevention for corrosion, the electrode comprising a sintered body of a mixture of iron oxide of 90 to 55 mol % in terms of Fe.sub.2 O.sub.3 and a metal oxide of 10 to 45 mol % in terms of MO (M is at least one metal selected from the group consisting of Mn, Ni, Co, Cu and Zn), and a process of electric prevention for corrosion by using said electrode as an anode.