Abstract: A tape wrapping mechanism for a rotary head type VTR wherein a tape pulling post is provided on a rotary ring mounted rotatably on the outer periphery of the cylinder, a rotary ring is rotated so that the post rotates along the outer periphery of the cylinder to pull out the tape from the cassette and wrap it around the cylinder and the rotary force of the rotary ring is such that, when the magnetic tape is wrapped at a predetermined wrapping angle, a pinch roller is automatically pushed toward the capstan with the tape therebetween. With this mechanism, a state capable of recording and reproduction is realized and the abutment of the pinch roller against the capstan is automatically released by a reverse rotation of the rotary ring when switching from the recording-reproduction state to the stop state.

Abstract: A distribution type delay line particularly adapted for use in a color television receiver and for mass production is disclosed. A bobbin with several axially spaced flanges defining several winding or coil slots therebetween is combined with a circuit of series-connected grounding electrode windings or coils each wound in each slot and each consisting of a predetermined number of turns of insulated wire and/or a circuit of series-connected shield windings each wound in each slot and each consisting of a predetermined number of turns of insulated wire, and a circuit of series-connected signal windings each wound in each slot outwardly and/or inwardly of the grounding electrode and/or shield windings and each consisting of a predetermined number of turns of insulated wire, the grounding electrode and shield windings being wound in the opposite directions so that the magnetic fluxes induced thereacross may be cancelled by each other.

Abstract: The present invention relates to a multiple push-switch apparatus comprising an exclusion mechanism which includes a plurality of slidably supported operation bodies and a flexible body, any one of said plurality of operation bodies being able to move by means of said flexible body, and a plurality of electric switches which are driven by said plurality of operation bodies, respectively. In addition, there is provided a multiple push-switch apparatus especially suitable as a station selecting apparatus for a television receiver. The apparatus can be operated by the use of a soft touch, permits the employment of various operation body arrangements, and prevents simultaneous operation of a plurality of electric switches by mistake.

Abstract: A television receiver protection system providing X-ray protection to the viewer responds to rectified horizontal flyback pulses supplied to the gate electrode of a silicon controlled rectifier through a zener diode to trigger the silicon controlled rectifier into conduction when the high voltage level from the flyback transformer of the receiver becomes abnormally high. The silicon controlled rectifier is connected across the power supply for the horizontal oscillator, so that the horizontal oscillator is rendered inoperative when the silicon controlled rectifier becomes conductive.

Abstract: An induction heating apparatus comprising a pair of inversely parallel-connected gate-controlled switching devices connected to an alternating current source, a resonant circuit including an induction heating coil and a variable frequency gating circuit for firing the switching devices to generate oscillations through the conducting device and the induction heating coil. The switching devices are gated into conduction in succession in a first order during the positive half cycle of the alternating current and in a reversed order during the negative half cycle. A zero crosspoint detector is provided to inhibit gating when the source voltage is near zero crosspoint level and to control the gating frequency in accordance with the instantaneous value of the source voltage to increase the turn-off time of the switching devices for lower input source voltage.

Abstract: A rotary head type magnetic recording and reproducing system of helical scan type is disclosed using a tandem type tape cassette accommodating coaxial supply and take-up reels. At the time of tape loading, a rotary ring carrying a tape take-out post is rotated along the outer periphery of a cylinder including a rotary magnetic head assembly, and with this rotation the take-out post contacts the magnetic tape which is drawn out of the cassette and passed round the cylinder at a predetermined angle.

Abstract: A turntable direct-drive system in which a cylindrical rotor having an inverted U-shaped cross sectional configuration is carried by a turntable shaft, and two stator cores with windings mounted thereupon are disposed at opposite sides, respectively, of the side wall of the cylindrical rotor and spaced apart therefrom by a distance suitable to exert the driving force to the side wall of the cylindrical rotor. A turntable is supported by the turntable shaft or on the top of the cylindrical rotor directly or through a plurality of projections extended therefrom or a plurality of elastic supporting members attached thereto so that the turntable may be maintained at a level and vibrations thereof may be minimized.

Abstract: A multi-element magnetic head having a plurality of magnetic heads, in which a common electrode common to the coils of the individual heads is provided. By this construction the number of electrodes is reduced and also the area required for contact between leads from an external circuit and electrodes are reduced. Thus, it is made possible to reduce the head pitch of the magnetic heads.

Abstract: A magnetic head consists of a magnetic flux converging core having a magnetic gap and a magnetoresistive effect element which forms a magnetic circuit and which is arranged in the same plane as the magnetic gap. The direction of thickness of the magnetic circuit is aligned with the direction of width of a track of a record medium, and shielding plates of ferromagnetic material are arranged on both sides of the plane.

Abstract: A sheet of partially acetalled polyvinyl alcohol is used as the substratum of the article, and a sparingly soluble silver halide is precipitated on the sheet from an aqueous phase such as an ammoniacal silver chloride solution.

Abstract: The present invention discloses a process for fabrication of dielectric optical waveguide devices by utilizing selective epitaxial growth. Concentrated energy such as an electron or laser beam is focused on a predetermined region on the surface of a substrate during the epitaxial growth with the application of molecular beams so that the mixed crystal grown in the irradiated region may have a chemical composition different from that of the mixed crystal grown on the non-irradiated region. Since this process permits to overlaying the embedded waveguides one upon another, complex optical waveguide devices can be fabricated in a simple manner.

Abstract: Machine adapted to be incorporated in a refrigeration chamber of a refrigerator to make ice cream, comprising means for containing an ice cream mix in an agitation vessel and agitating the same, and means for causing an air layer on the outer surface of the agitation vessel to move. The provision of the air layer moving means is effective to promote heat exchange between the outer surface of the agitation vessel and the cold air in the refrigeration chamber by forcedly moving the air layer which might otherwise interfere with the exchange of heat between the outer surface of the agitation vessel and the cold air in the refrigeration chamber.

Abstract: A magnetic recording and reproducing system comprises a capstan, reel shafts, a motor for rotatably driving said capstan and said reel shafts, a magnetic tape wound up by the rotation of the reel shafts, a pinch roller for pressing the tape against the capstan, and a drive mechanism for driving said pinch roller into engagement with and disengagement from said capstan by a rotation force of said motor.

Abstract: An electric fishing float in which a cell used as a power source is an elongated cylindrical cell having an electrode axially upwardly extended from the top of the cell and with the shell of the cell serving as another or opposite electrode in order to turn on a light source such as a light emitting diode or miniature lamp positioned within an elongated float body adjacent the closed top end thereof.

Abstract: A surface layer type secondary-electron multiplier consisting of a support and a secondary-electron emissive and electron-conductive high-polymer layer formed thereupon is disclosed. For forming the secondary-electron emission layer, paint consisting of an electron-conductive high-polymer dissolved or suspended in solvents is used. Alternatively, the support may consist of a nitrogen- or sulphur-containing electron-donor polymeric composition which may be molded or formed, and a charge-transfer complex conductive layer may be formed upon the support.

Abstract: A radio receiver consisting of a radio receiver circuit capable of the reception of one band such as the AM band and one or more adapters capable of the reception of other bands such as the FM band, the radio receiver circuit and the adapter housed in the same cabinet. Each adapter includes components such as a tuner, a detector and so on required for the reception of a desired band, and the output from a radio oscillator in the radio receiver circuit is converted into a voltage signal in response to which the tuning is carried out in the adapter. The number of reception bands may be increased in a simple manner depending upon the demand of the listener, and various operation control means such as a preset mechanism, a volume control and so on may be used in common among various adapters.

Abstract: A cerium-activated yttriumaluminate phosphor such as YA10.sub.3 :Ce featuring an enhanced luminous intensity is produced by adding a barium compound exemplified by BaO, BaCO.sub.3, Ba(OH).sub.2 and BaF.sub.3 to a mixture of source materials of the host material and the activator and baking the resulting mixture at a usual temperature ranging from 1000.degree. to 1400.degree. C. The barium compound preferably amounts to 0.001-8 mol% of the yttriumaluminate and may alternatively be introduced into a preliminarily baked and pulverized mixture of the source materials.

Abstract: A recording and reproducing apparatus including a disc-like recording medium which rotates at high speed, a pick up device in contact with the medium and a means for displacing the pick up device positively in a radial direction of the medium, wherein the improvement resides in the condition of contact between the medium and the pick up being maintained in a good and stable manner due to either a convex base plate or an air baffle plate surrounding the disk.

Abstract: Production of a recording material having the chemical composition Na.sub.6 Al.sub.6 Si.sub.6 O.sub.24 .multidot.2(1-x)NaX.multidot.xNa.sub.2 SO.sub.4 (X is F, Cl, Br or I and 0.1 .ltoreq. .times. .ltoreq. 0.8) by only the simple sintering method can be attained by substituting a part of halogen site of said composition by other ions.