Abstract: A disk apparatus of zone-recording type having a plurality of recording zones is structured such that a plurality of reference clock signals, each corresponding to a recording zone, are generated in both a recording mode and a reproducing mode. A reference frequency signal means, for generating an oscillating signal of a reference frequency, is combined with a variable frequency forming phase locked circuit. A first switch selectively causes the phase locked circuit to perform the phase locking in response to the reference frequency signal generated from the reference signal means or the reproducing signal. A demultiplying means switches a demultiplying ratio according to the mode.

Abstract: A cooling fin, used in a heat-exchanger, which includes a breakable line section extending from one side of the cooling fin plate to a substantially middle portion of the plate in a direction perpendicular to the elongated direction of the plate and a substantially V-shaped notch formed at a portion of the other side of the plate corresponding to the extended end of the breakable line section. The cooling fins are stacked in prescribed numbers to make a cooling fin block. The breakable line section includes a perforated line and is broken when one part of the cooling fin block in the elongated direction is bent against the other part of the block along the breakable line section.

Abstract: A clothes dryer of the dehumidification type is disclosed in which hot air induced by a heater is circulated from a drying compartment through a heat exchanger. A volume, wetness, wetness unevenness, temperature, temperature unevenness of clothes to be dried and the temperature of the hot air blown out of the drying compartment are detected by respective detectors. Results of detection are input to a control device incorporating a neural network. The control device operates in the manner of neurocontrol to control a volume of outside air supplied to the heat exchanger and a heating value of the heater.

Abstract: A video disc player comprises a gray level picture display device for displaying a gray level picture during a track jump and a phase difference detecting circuit for detecting a phase difference between a phase of a horizontal synchronizing signal involved in a reproduced video signal and a horizontal phase for a gray level display during a so-called scan reproduction mode. The horizontal synchronizing signal of the gray picture is corrected so that the above-described phase difference will fall within a tolerance range. Therefore, a satisfactory reproduced video signal without horizontal synchronization disturbance can be obtained.

Abstract: A disc drive unit in which a controller detects the storage capacity of the disc cartridge during loading into the drive by interrogating switches which are actuated by capacity indication markers on the disc cartridge.

Abstract: A magnetic core employed in AC motors, transformers and the like includes a first core portion formed by laminating silicon steel sheets each containing 3.5% silicon, the first core portion having two ends in the direction that the sheets are laminated, and second core portions disposed at the respective ends of the first core portion and formed by laminating silicon steel sheets each containing 6.5% silicon. In distorted wave alternating field, low frequency fluxes pass through the first core portion and harmonic fluxes pass through the second core portions. Since each second core portion has a low level of magnetostriction, the magnetic noise due to the harmonics is reduced.

Abstract: A digital signal transmission method in which a digital signal having a header block of a predetermined length is transmitted. The header is comprised of a synchronization signal and auxiliary data. The auxiliary data is made up of first data or second data and a redundant error detection code. The redundant code indicates whether the block contains the first data as the auxiliary data or the second data as the auxiliary data so that different headers having different contents can be distinguished by the reproduction apparatus.

Abstract: A high frequency heating apparatus includes a casing, an inverter enclosed in the casing, a magnetron supplied with high frequency voltage from the inverter, and three attachment plugs each connected to one of external power supplies of different output voltages. The attachment plugs are connected to the inverter input side via respective power supply selecting switches. The apparatus further includes three display panels one of which is selectively attached to the apparatus. Each display panel has an indicia indicative of one of the power supply voltages used and two projections selectively turning off the other two power supply selecting switches when attached to the apparatus.

Abstract: To enable simple and accurate positional adjustment of the various tape loading and driving elements of a cassette tape recorder and/or reproducer, a single mode changing slider controls respective displacements of movable members of a reel base driving mechanism, a pinch-roller transferring mechanism, a brake operating mechanism, a back-tension exerting mechanism, a tape loading mechanism and so forth, which displacements are required whenever an optional mode of the apparatus is selected.

Abstract: A dehydrator for use in washing clothes or the like includes a dehydration tub mounted in an outer cabinet, a brushless motor for rotating the dehydration tub for a dehydrating operation, and a microcomputer-based controller for controlling the rotational speed of the motor so that the motor is rotated at a plurality of different rotational speeds sequentially during the dehydrating operation. The different rotational speeds include a maximum rotational speed ranging between a rated rotational speed or above and a rotational speed corresponding to a resonant point of the outer cabinet.

Abstract: A digital demodulating apparatus which is high in accuracy in operation and simple in construction. The digital demodulating apparatus comprises an analog to digital converter for converting an input modulated signal having a carrier frequency of fc and a band width of 2B into a digital signal with a sampling clock signal of a sampling frequency of fs, a sampling clock generating circuit for generating a clock signal of the sampling frequency fs which is defined asfc.perspectiveto.(2m+1)/4.multidot.fsandfs>4Bm being an arbitrary integer, an orthogonal component extracting circuit for extracting, from an output digital signal of the analog to digital converter, two components which are different by (an odd number/2).multidot..pi. in phase from each other, and a demodulator of the digital signal processing type for receiving such two extracted components from the orthogonal component extracting circuit and producing a demodulated signal from the two received components.

Abstract: An optical disc recording/reproducing apparatus by which data is recorded and/or reproduced with a laser beam scanning an optical disc provided with recording tracks (TK.sub.s), each of the recording tracks (TK.sub.s) being composed of a data recording area (DA) and a servo area (SA) having tracking pits (Q.sub.A) and (Q.sub.B), characterized in that the apparatus is provided with a driving circuit (35) for driving a laser (11) for irradiating the recording track (TK) with a laser beam, detecting means (12) for detecting light obtained by reflection of the laser beam by the recording track (TK), and laser output controlling means (18) and (33) for sampling-and-holding the output from the detecting means (12), detecting the difference between the levels of outputs of the tracking pits (Q.sub.A) and (Q.sub.B) and of a pitless portion (1), and controlling the driving circuit (35) so that the difference may be equal to a target value.

Abstract: A digital signal processing circuit for use in different types of digital audio tape recorder that record a standard track format using different arrangements of rotary drum and the like. The circuit provides a record signal having a transmission speed and timing switched in accordance with the structure of the rotary drum and the like.

Abstract: A laser scanning apparatus having horizontal and vertical deflection means for deflecting n laser beams of the same wavelength modulated by n kinds of pattern information signal components in the horizontal and vertical directions. The n laser beams are spatially separated so that the pattern informations are directly drawn on a plurality of drawn media. Thus, pattern informations of different patterns can be drawn on the plurality of drawn media by one horizontal deflection means and one vertical deflection means, whereby the laser scanning apparatus can be made compact in size, light in weight and small in power consumption. Also, the pattern informations can be drawn with high coupling ratio (high light utilizing ratio and proper brightness) and high resolution.

Abstract: A head protection control for a magneto-optical recording/reproducing device, including an elastic arm for mounting a magnetic head at one end portion of the arm and biasing the magnetic head in a direction contacting a surface of a magneto-optical disk, which elastic arm is movable in a radial direction of the magneto-optical disk; a driver for driving the elastic arm in a direction moving away from the surface of the magneto-optical disk; a phase-locked loop (PLL) for generating a lock signal when the PLL circuit becomes synchronous with a clock signal in a reproduced signal from the magneto-optical disk; and a controller for controlling the driver so as to cause the driver, upon receipt of the lock signal, to lower the magnetic head to face the magneto-optical disk during rotation at the predetermined speed with a fine gap defined between the magnetic head and the magneto-optical disk by a flying force due to an air stream.

Abstract: A circuit substrate supporting structure for electronic components includes a circuit substrate, one side edge of which projects beyond a chassis of the component, a connector being mounted thereon from which a plug may be inserted or removed. The substrate projects from a lower base portion of the chassis. The connector is arranged on the projecting substrate, such that the engaging portion of the connector is faced away from the chassis. The chassis is covered with a shield case having a rear wall portion situated slightly above the upper surface of the connector such that the connector is between the substrate and the lower edge of the wall portion. The wall portion is formed with a stopper projecting from the lower edge in the vicinity of the connector for tightly retaining the connector between the stopper and the substrate to resist bending stress caused by the insertion and removal of the plug.

Abstract: A microwave oven includes a casing defining a heating chamber, a track member disposed in the heating chamber and having an undulate surface circumferentially extended, an electric motor mounted in the casing, a plurality of rolling members each moved along the undulate surface of the track member by the motor, rolling about respective axes thereof in contact with the undulate surface of the track member, and a turntable on which food to be cooked is placed, the turntable having a traveling face and placed on the rolling members so that the traveling face thereof is in contact with the rolling members, whereby the turntable is rotated with a vertical movement.

Abstract: A radiation sensitive device comprising several rings and a middle section formed by a conventional charge coupled device. Drain means for radial draining of the charges generated in the circular sections by the incident radiation and drain means for the charge coupled device are provided. The device has a retina-like structure and can be advantageously applied in robotics.

Abstract: A copying machine according to this invention is provided with a key counter and an all-clear function associated therewith. The machine is allowed to perform copying operation only when it is loaded with the key counter. When the key counter is removed, all copying conditions entered in the copying machine by a user are restored to the state before the start of the copying operation. Thus, production of undesired copies attributable to the user-set copying conditions used last can be prevented, so that the cost of copying can be reduced.

Abstract: A disc cartridge made up of a cartridge housing and a disc-shaped recording medium, such as an optical disc or a magneto-optical disc, accommodated in the cartridge housing, is disclosed. The cartridge housing of the disc cartridge is provided with a recording/reproducing aperture for exposing a part of the disc-shaped recording medium to the outside along the radius of the disc, and with a shutter member for opening or closing the aperture. Within a shutter opening actuating recess formed in the cartridge housing, a discriminating member associated with the type of the disc-shaped recording medium accommodated in the cartridge housing is provided for closing at least a part of the recess to prevent insertion of the disc cartridge into a recording and/or reproducing apparatus which is not suited to the type of the disc-shaped recording medium of the disc cartridge.