Abstract: Amorphous metal alloys are employed in a magnetic head as core materials in the present invention. Such alloys are generally composed of M and Y, wherein M is at least one of Fe, Ni and Co and Y is at least one of P, B, C and Si. The amorphous metal alloys used are marked by a combination of the desirable properties of conventional permalloy with those of conventional ferrites.

Abstract: A non-linear resistor comprises a sintered body of a ceramic composition which comprises 99.94 to 80.0 mole % of zinc oxide as ZnO, 0.02 to 10.0 mole % of the specific rare earth oxide selected from the group consisting of oxides of cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium as R.sub.2 O.sub.3, and 0.04 to 10 mole % of manganese oxide as MnO.

Abstract: An improved reduction-reoxidation type semiconducting ceramic capacitor and the method for producing the same are disclosed. The main components of the substrate of the capacitor are CaTiO.sub.3, SrTiO.sub.3 and Bi.sub.2 O.sub.3 .multidot.xTiO.sub.2. Said substrate also contains at least one member selected from the group consisting of manganese, cobalt, nickel, chromium, vanadium, niobium, tantalum, lanthanum and cerium ions in total amounts of 0.025 to 0.4% by weight. The capacitor according to the present invention excels, in the temperature independency of the capacitance and tan .delta., etc.

Abstract: An electrode comprises a conductive substrate which is coated with 7 to 50 mole % of a total combination of palladium oxide and ruthenium oxide and 93 to 50 mole % of tin oxide as the main components, wherein less than 40 mole % of said tin oxide is substituted with titanium oxide.

Abstract: A sintered ceramic dielectric body is provided which exhibits a high dielectric constant as well as a low dielectric loss and almost no variation in the dielectric constant and the dielectric loss with respect to a wide variation of an applied high AC or DC voltage, respectively. The ceramic dielectric composition consists essentially, by weight, of approximately 18 to 70% of strontium titanate (SrTiO.sub.3), approximately 4 to 75% of barium titanate (BaTiO.sub.3), 2.5 to 17.4% of bismuth oxide (Bi.sub.2 O.sub.3) and 1.7 to approximately 20% of titanium oxide (TiO.sub.2); the ratio by mole of the titanium oxide (TiO.sub.2) to the bismuth oxide (Bi.sub.2 O.sub.3) being within the range from approximately 1 to 18.

Abstract: A ceramic dielectric composition is provided which consists essentially of bismuth titanate with substituents, expressed by the formula:Bi.sub.4-x Me.sub.x Ti.sub.3-y R.sub.y O.sub.12where R is at least one divalent metal selected from strontium, barium and lead, Me is at least one pentavalent metal selected from tantalum, niobium and antimony, and both x and y are numbers falling within the range of 0.4 to 2.0 and the ratio of x/y is within the range of 0.9 to 1.1. This composition may contain specified metal oxide additives. The ceremic dielectric composition is sintered at a relatively low temperature, and exhibits a dielectric constant having a reduced dependence upon temperature variations over a wide use range, a reduced dielectric loss, enhanced resistivity and breakdown voltage.

Abstract: The specification discloses a first and a second rotary disk fixed together, each disk having a magnetic pole on its circumference, which disks rotate in the vicinity of a fixed magnetic head; the fixed magnetic head provides an electrical output signal each time a magnetic pole passes near it and, thus, said electrical output signal indicates a rotational angle and/or the number of rotations of said disk. Said magnetic head operates on a new principle developed from parametric excitation.

Abstract: A tape cassette characterized by a bias changeover slot being disposed adjacent to an accidental erasure protective slot and wherein a blocking element for covering an opening of the accidental erasure protective slot is securable on the wall thereof which is disposed opposite the bias changeover slot.

Abstract: A video recording system with a plurality of fixed recording-and/or-playing-back magnetic heads has been disclosed. A video signal with a wide frequency band is converted using an Hadamard conversion circuit, to a plurality of narrow band signals. Each narrow band signal is recorded and played back by each fixed head. The Hadamard conversion circuit is very simple in structure and can be provided with digital switching circuits and adders or integrators.

Abstract: A microwave heating oven has a seal located in the path formed by a gap between the oven body and the oven door for preventing microwave leakage. The seal may comprise several seals, and includes a microwave absorber as one of the seals. The microwave absorber consists of a mixture of a powder of magnetic material and an organic high molecular weight compound. The length of the microwave absorber in the direction of propagation of microwave in the path of microwave leakage is an integral multiple of about 1/2.lambda., wherein .lambda. is a wavelength of the microwave in the microwave absorber. Absorption is improved by setting the absorber in a recess in the wall or door of the oven, or by surrounding the absorber by a metal layer except on the surface thereof parallel to the direction of propagation and facing the gap.

Abstract: A tape cassette characterized by a bias changeover slot located adjacent to an accidental erasure preventive slot wherein, when the accidental erasure preventive slot is kept in an inoperative state, a U-shaped snap is secured in such slot so that the base of the U-shaped snap is disposed to cover the opening of the accidental erasure preventive slot, and when the slot is to be kept in an operative state, the U-shaped snap is secured in the slot so that the base of the U-shaped snap is arranged against the wall of the slot located opposite the adjacent bias changeover slot, whereby the accidental erasure preventive slot is uncovered and the snap is secured within the cassette.

Abstract: An aggregation treatment apparatus for waste water which comprises a susping section for mixing particles of metal, metallic oxide or sintered metallic oxide into feed water such as sewage and drainage, and forming a slurry; an electrically aggregating section for the slurry which is installed separately from the suspending section; and a separating section which is formed integrally with the suspending section, and separating the particles from flocks in the treated water, returning the particles into the suspending section and discharging the treated water from the upper portion. The slurry is pumped from the suspending section to the electrically aggregating section. An electric field is applied to the slurry by means of an electrode tube in the electrically aggregating section, colloidal particles in the feed water is thereby aggregated to the added particles to form flocks and the treated water is then passed to the separating section.

Abstract: An improved high voltage ceramic capacitor is disclosed which includes a ceramic body having electrode layers formed on opposite sides thereof. Novel terminals formed of material having a coefficient of expansion which is the same as, or nearly the same as, the material of the ceramic body are bonded to the electrode layers to prevent voids resulting from thermal stresses.

Abstract: Apparatus for humidity measurement employing a dielectric resonator consisting essentially of a metallic guard, a solid dielectric material, an input antenna and an output antenna.Method of measuring humidity comprising feeding a microwave energy of swept frequencies to the input antenna of said appratus, recovering said energy as a microwave power from the output antenna, and then determining the humidity of the gas through which the microwave energy travels from one antenna to the other, the value of humidity being based on the frequency characteristic of said microwave power.