Abstract: In a magnetic recording medium wherein a metal thin film magnetic layer and an overcoat are formed on a nonmagnetic substrate, durability is improved when the overcoat comprises a plasma-polymerized film and a topcoat of an organic fluorine compound; a plasma-polymerized film, a protective carbon film, and a topcoat of an organic fluorine compound; a plasma-polymerized film containing C, F and H; or a plasma-polymerized organometallic film and a fluorine or silicon-containing topcoat. Oxidation of the upper surface of the magnetic layer with a plasma is also effective.

Abstract: A PTC heating device is adapted to be used as a heat source for an electric vaporizer which is adapted to heat liquid medicine, e.g., liquid insecticide, aromatic liquid, or the like, to vaporize it. The PTC heating device includes a casing in which an electrode structure including at least one PTC thermistor having electrodes arranged on both surfaces thereof and two electrode members interposing the PTC thermistor therebetween is received. The PTC heating device further includes a heat-radiating member mounted through a heat-conducting member with respect to the casing and for heating an absorber having sucked up liquid medicine from a reservoir having the liquid medicine contained therein to vaporize the liquid medicine. One of the electrodes of the PTC thermistor is in close contact with a flat surface of the heat-conducting member through one of two electrode members, so that heat generated at the PTC thermistor is efficiently transmitted to the heat-radiating member through the heat-conducting member.

Abstract: An electronic circuit element capable of positively and stably accomplishing its provisional fixing on a printed circuit board substantially free of any trouble and being readily taken out or extracted for the mounting on a printed circuit board, irrespective of a manner of holding of the circuit element prior to the extraction. The electronic circuit element includes an element body and an adhesive or polymeric layer deposited on the element body. The polymeric layer is arranged on a surface of the element body opposite to a printed circuit board on which the circuit element is to be mounted. The polymeric layer is formed of a material exhibiting adhesion when it is heated to a temperature of about 80.degree. C.

Abstract: A tape cassette has a case with upper and lower halves and an open space at the front thereof. A magnetic tape housed in the case is wound around a pair of reels. A brake is slidably mounted on the inner surface of the lower half of the case to prevent the reels from being rotated. Part of a spring is attached to the brake. The spring has free ends and urges the brake in a direction. A device for positioning the spring includes a partition wall on the inner surface of the lower half of the case which partitions the open case from the inside of the case. An independent abutment member on the partition wall abuts the free ends of the spring.

Abstract: A magnetic tape cassette comprises a casing consisting of upper and lower half casings, reel hubs contained in the casing so as to be rotatable, a magnetic tape wound around on the reel hubs, guide rollers and/or guide poles provided in the casing, a pad for pushing the magnetic tape against the guide rollers and/or guide poles, and a pad position restricting member formed integrally with the upper and lower half casings to restrict the position of the pad.

Abstract: There is proposed a tilt sensor in which a permanent magnet having a surface coated with a magnetic field is housed in a hollow portion of a nonmagnetic case, and a magnetic sensing element is disposed outside a bottom portion of the case. When the case is tilted at an angle exceeding a predetermined angle, the permanent magnet is greatly moved and the magnetic sensing element detects the movement of the magnet. Furthermore, adverse influences due to magnetic attraction between the permanent magnet and the magnetic sensing element or a surface tension of the magnetic fluid are compensated.

Abstract: A disc cartridge capable of preventing a recording surface section of a disc from being contacted with an inner surface of a casing so that the disc may be free from any damage. The disc cartridge includes steps or sheet-like members provided on the inner surface of the casing in a manner to be inwardly projected from the inner surface. The steps or sheet-like members are positioned so as to be engaged with a non-recording surface section of the disc to support the disc thereon, so that a clearance may be defined between the recording surface section of the disc and the inner surface of the casing.

Abstract: A magnetic recording medium comprising a substrate and a continuous thin film magnetic layer on the substrate is prevented from curling or cupping by incorporating a polymeric organic compound in the magnetic layer. An organic compound is introduced into the magnetic layer during its formation and polymerized with the aid of plasma or radiation. A topcoat is formed on the magnetic layer by plasma polymerizing an organic compound for further improvement.

Abstract: A magnetic tape cassette includes a protective cover pivotally mounted to the front side of a housing wherein the upper and lower front edge corner portions of an elongated main portion of the protective cover is formed with smooth surfaces to prevent the cover from inadvertently pivoting or opening during handling to expose the magnetic tape to contaminants.

Abstract: An improved guide member assembly in a cassette for guiding the travel of web-like data carrying material includes a support base provided on the cassette, a supporting shaft mounted on the support base, guide means rotatably mounted on the supporting shaft having a peripheral data carrying material guiding surface and fluid lubricant disposed between the supporting shaft and guide means. A device is provided for reliably preventing any of such fluid lubricant from accumulating on and adhering to the data carrying material guiding surface of the guide means.

Abstract: An optical recording medium comprising a recording layer on a substrate is more durable when an intermediate layer of a composition comprising a rare earth element oxide, silicon oxide, and silicon nitride is formed between the substrate and the recording layer.

Abstract: A disc cartridge and a casing therefore capable of carrying out insertion and removal of a disc with respect to the casing without separating a shutter from the disc cartridge and adversely affecting the disc, with simple operation. The casing includes a casing body constituted by an upper cover member and a lower cover member joined together to form an inner space therein which is adapted to rotatably receive therein a disc having a non-recording section formed at its outer periphery and be separable at rear ends thereof from each other. The casing also includes a pair of guides arranged on both side of a rear portion of an interior of the casing body so as to be opposite to each other. The guides permit insertion and removal of the disc with respect to the casing body to be safely accomplished along the guides through the opened rear end of the casing. The disc cartridge uses such a casing.

Abstract: A semiconductive ceramic composition for a reduction reoxidation type semiconductive ceramic capacitor capable of increasing capacitor, dielectric strength of the capacitor and improving temperature characteristics of the capacitor. The composition includes a BaTIO.sub.3 base component and a minor component consisting of Nb and Ce. Nb and Ce are present in amounts of 0.2 to 3.0 mol % on Nb.sub.2 O.sub.5 and CeO.sub.2 bases. Addition of Co and the like increases insulation resistance and D.C. breakdown voltage of the capacitor and further improves temperature characteristics of the capacitor.

Abstract: In a tape cassette housing including a lid which protects the tape at the front of the housing, and a lid locking member turnably pivoted in the housing and having two leg levers, one to lock the lid when the latter closes the front opening of the housing and the other to release the lid when the same is turned open, the distance between the rotational center of the pivot of the lid locking member and the crown of its head is longer than the distance between the center of pivot bearing in the housing and the rear wall of a space in which the lid locking member is mounted.

Abstract: A semiconductive ceramic composition capable of exhibiting excellent electrical and physical characteristics sufficient to be used for a boundary-layer type semiconductive ceramic capacitor and such a capacitor capable of being increased in dielectric constant and insulation resistance and exhibiting excellent solderability and tensile strength of electrodes. The composition includes a SrTiO.sub.3 base material and an additive for semiconductivity consisting of Y.sub.2 O.sub.3 and Nb.sub.2 O.sub.5. The Y.sub.2 O.sub.3 and Nb.sub.2 O.sub.5 each are present in an amount of 0.1 to 0.4 mol % based on the composition. The capacitor includes a semiconductive ceramic body formed of the composition, a first conductive layer formed on each of both surfaces of the body and a second conductive layer formed on the first conductive layer. A process for manufacturing the capacitor is also provided.

Abstract: A casing for a magnetic tape cassette capable of constantly actuating a slider with high reliability for a long period of time, even under conditions of high temperature. The casing includes a casing body having an upper casing member and a lower casing member joined together, and a tapping boss of high rigidity arranged therein, with a slider being slidably mounted on the lower casing member so as to cover at least a part of a bottom and sides of the lower casing member. The casing also includes a torsion spring arranged in the casing body to act on the slider, the torsion spring having a coil-like portion supported on a supporting member mounted on the lower casing member, and an end of the torsopm spring engaged with the slider. The other end of the torsion spring is securely held in an engagement portion formed at the tapping boss.

Abstract: A nebulizer which pumps up water and mists the pumped up water comprises an elongated main body with a center hole for water passage, and piezoelectric vibration elements together with electrodes for energizing the same mounted on the main body. The vibration elements are water-proofed, and the nebulizer itself is supported by using a flange on a water-proof member and the flange is on a plane on which a center electrode is positioned. Upon vibration of the elements, water is pumped up through the inlet of the main body, and is dissipated into the air through the outlet of the main body. Preferably, the inlet and the outlet are removable from the main body, and the inlet is coated with a thin hard film. Preferably, the outlet is covered with a mesh, or at least an opening of the outlet is covered for preventing the release of water that has not been convereted to mist.

Abstract: In a magnetic tape cassette comprising an upper half housing section with a see-through window, a lower half housing section, a pair of hubs on which a length of magnetic tape is wound and which are rotatably fitted in between the two half housing sections, and a stopper located between one edge of the tape wound on the hubs and the upper half housing section and having pawls engageable with given points of the hubs, the stopper has a flap portion slidable along the inner side of the see-through window and which is exposed when the pawls are engaged with the hubs. The stopper is slidable perpendicularly to the axes of rotation of the hubs. It is colored as classified by the grade, use, or type of the magnetic tape involved. Its exposed area visible through the see-through window is at a maximum when the stopper is engaged with the hubs.

Abstract: An optical recording medium comprising a recording layer on a substrate and a protective layer formed adjacent to the upper and/or lower surface of the recording layer is more durable and corrosion resistant when the protective layer has a composition comprising, in % by weight, 40-60% of SiO.sub.2, 0.5-10% of an alkali metal oxide, 10-59.5% of Al.sub.2 O.sub.3 and/or B.sub.2 O.sub.3, and optionally up to 50% of a divalent metal oxide.

Abstract: A magnetic head of a cassette tape recorder set is demagnetized by a demagnetizer mounted in a tape cassette housing. The demagnetizer has an erase head which faces with the magnetic head which is subject to a demagnetizing action, a pair of rotatable rings which engage with spindles of the tape recorder set, energizing means for energizing said erase head with AC decreasing current, and coupling means for coupling said rings for simultaneous rotation of the rings.