Abstract: The metal gasket of the invention is installed in an internal combustion engine. The engine includes at least one cylinder bore, a plurality of bolt holes and at least one fluid hole. The gasket is basically formed of a metal plate and includes holes corresponding to the holes of the engine. The gasket includes a bead for sealing around the fluid hole, to which different tightening pressure is proportionally applied when the gasket is tightened. The bead includes at least one first portion where high tightening pressure is applied, and at least one second portion where moderate tightening pressure is applied. The second portion has spring constant less than that of the first portion. When the gasket is tightened, the bead is compressed according to the tightening pressure applied thereto to thereby properly seal around the fluid hole.

Abstract: An apparatus for playing CLV disks is provided with a speed signal generator for generating a speed signal having a frequency corresponding to the rotational speed of the disk, and the rotation of the disk is controlled so that the frequency of the speed signal equals to a predetermined frequency independently of the radial position of an information reading point of a pickup, thereby the period of a search operation of the apparatus is shortened.

Abstract: A video signal reproduction apparatus with time base error correction and synchronization correction. The synchronization correction circuit is used only where the condition of the recorded video signal is such that synchronization correction is necessary. The latter circuit includes an image memory for storing a field of video data. The video data input to the image memory is at a relatively low data rate to enable use of a relatively low capacity image memory.

Abstract: The steel laminate gasket is installed between two engine parts. One of the engine parts is provided with at least two positioning pins for setting a location of the gasket. The gasket comprises at least first and second plates. The first plate includes at least first and second holes formed at portions corresponding to the positioning pins, and at least one flap surrounded by slits. The flap is formed adjacent to the first hole to slightly project thereinto. The second plate is situated above the first plate and is connected thereto. The second plate includes third and fourth holes corresponding to the first and second holes, and at least one notch located adjacent the third hole above the flap. When the gasket is pushed over the positioning pins, the flap bends and engages the positioning pin to securely connect the gasket to the engine block.

Abstract: A plurality of original video signals of channels are processed with a frame unit at intervals of a predetermined cycle in time sequence through the use of time-division multiplexing operation so as to produce a single time-division multiplexed video signal, two interlaced fields constituting one frame of the multiplexed video signal are composed of two fields of the original video signal spaced in time sequence apart from each other at intervals of a predetermined number of fields in the original video signal. In reproduction, in response to the motion of the picture, the field repetition reproducing operation and the frame repetition reproducing operation are selectively conducted so as to improve the vertical picture resolution even when the original video signal represents a picture containing a motion.

Abstract: A spindle servo unit for disk playing device detects a synchronizing signal in an information signal read from a recording disk and generates a signal synchronized with the detected synchronizing signal. The generated signal is frequency-divided. An error signal is generated in accordance with the phase difference between the frequency-divided output, and the error signal is supplied to rotate the recording disk.

Abstract: In a data reading device of the type in which a servo loop controls the movement of a reflection mirror to control the position of the data detection point, a second servo loop is used to return the mirror to its initial position when the amount of deflection of the mirror exceeds a predetermined range.

Abstract: A recorded information reproducing apparatus, such as a video disk player, has a memory for storing video data of one field. The reproducing apparatus generates an address access detection signal when the absolute value of the difference between a generated write address and a generated read address of the memory decreases less than a predetermined value. The address access detection signal serves to change the phase difference between the synchronous signal in the read video signal and a standard synchronous signal which is synchronized with the read clock signal, thereby finely adjusting the time axis and changing the synchronization.

Abstract: A phase synchronizing circuit for a time axis shift correcting circuit includes a closed-loop phase lock circuit of a phase comparator, a VCO, and a frequency division counter, for providing an output signal phase locked to a reference signal included in an input data signal. Hold circuitry, responsive to a hold instruction signal, is provided to hold the phase relationship of the output signal held just prior to the hold instruction signal for the duration of the hold instruction signal. The hold instruction signal is produced in response to a predetermined condition of the input data signal.

Abstract: A metal plate used for a metal gasket. The metal plate is provided with a plurality of beads around portions to be sealed. The beads intersect with each other and include at least one intersecting portion. At least one depression is formed at the intersecting portion. As a result, when the beads are compressed, the intersecting portion can provide surface pressure at least substantially equal to the portions of the beads other than the intersecting portion.

Abstract: Method and apparatus of controlling time base for use in an information reading system in which information recorded on a recording medium is read by a pickup, write a read signal obtained by the pickup into a memory device and read-out the signal stored in the memory device by using a read-out reset signal so as to perform the time base control. Upon starting of a track jump operation of the information reading system, phases of generation of the read-out reset signal before and after the starting of the track jump operation is changed with each other.

Abstract: A video processing system in which data obtained from sampling an input video format signal according to a first timing signal is written into a first memory according to the first timing signal. Data is read-out of the first memory according to a second timing signal having a frequency equal to N times that of a horizontal synchronizing frequency of the input signal, thereby obtaining data with no time-base fluctuation. M-samples of data from the first memory is then written into a second memory, and data from the second memory is read-out such that the read-out signal from the second memory has a different phase than that of the input video format signal. The system is operable for simultaneously stopping data being read-out of the first memory and data being written into the second memory for a period of time equal to R+kM samples of the input video format signal, wherein R is an integer remainder of N/M, and k is either a positive integer or zero.

Abstract: A video information playback system for playing the so called CLV disks which uses a digital video memory for enabling special playback mode operations such as the SLOW mode, the STILL mode, and the FAST mode. In order to simplify the construction of the system, a frequency of write and read clock signals used in the digital video memory is selected n times the horizontal synchronizing signal frequency. A time base servo control part of the system is controlled using a phase difference signal between a playback synchronizing signal and a reference signal whose frequency is 1/n time the frequency of the write and read clock signals. During a track jump operation for a special playback mode operation, a supply of the write clock signal and/or the read clock signal to the reference signal generator is stopped so that the phase difference is maintained constant before and after the track jump operation.

Abstract: Information recorded on a non-CAV type recording disk is detected by a pickup device having an information reading point repeatedly moved during spaced intervals in a radial direction across recording tracks on the disk in response to a special playback operation command. Predetermined portions of the information so picked up, during periods between track jump operations, are entered into a memory device and the stored information read out therefrom to provide playback information for the special playback operation. The information reading point is moved by the track jump operations to positions establishing a time period sufficient to enable stabilization of a time base error in the information, caused by said track jump operations, before entry of the information into the memory is begun.

Abstract: A phase comparison circuit for producing a voltage error signal proportional to the difference in phase between a reference signal and an input signal. The reference signal is in the form of a sawtooth wave signal having a fixed frequency and fixed period. The input signal may vary widely in frequency. Sample pulses are derived from the input signal and are used to sample the ramps of the sawtooth signal to produce the error signal. When the frequency of the input signal differs from that of the reference signal to such an extent that the sample pulses do not occur during the ramps of the sawtooth signal, the sawtooth signal is repeatedly shifted in phase by one of two fixed amounts, depending upon the direction of the frequency difference, until the sample pulses occur during the ramps of the sawtooth signal.

Abstract: A method for time axis control for performing both coarse and fine time axis adjustment in accordance with relative speeds of a recording disk and a playback unit while the playback unit is recording or reproducing signals on or from the disk, wherein a color image is displayed during a scanning operation, which displayed image is natural in appearance. The pickup unit is first caused to follow a track formed on the recording medium in a tracking control operation. Repetitive track jumping operations are then effected over successive tracks by moving the pickup unit. For the track jumping operations, a time constant circuit within a circuit which performs the fine time axis adjustment is reset at least for the duration of each track jumping operation.

Abstract: A video information playback system for playing the so called CLV disks which uses a digital video memory for enabling special playback mode operations such as the SLOW mode, the STILL mode, and the FAST mode. In order to simplify the contruction of the system, a frequency of write and read clock signals used in the digital video memory is selected n times the horizontal synchronizing signal frequency. A time base servo control part of the system is controlled using a phase difference signal between a playback synchronizing signal and a reference signal whose frequency is 1/n time the frequency of the write and read clock signals. During a track jump operation for a special playback mode operation, a supply of the write clock signal and/or the read clock signal to a reference signal generator is stopped so that the phase difference is maintained constant before and after the track jump operation.

Abstract: A wheel cover wherein a plurality of struts are formed integral on the back face circumference of the wheel cover made of synthetic resin, a wire ring is fitted into inner recesses in the struts, and engagement pieces made of synthetic resin are fitted from outside onto the struts, respectively, to fix the wire ring to the struts. The wheel cover can be mounted on the wheel rim in such a way that the engagement pieces thus assembled with the struts are pressed onto the hump portion of the wheel rim.

Abstract: Method and system for phase comparison which uses a ramp-form signal generated from a reference frequency signal and a sampling pulse train signal synchronized with an input signal whose phase change is to be detected. The reference frequency signal, through a dividing circuit is normally utilized for generating the ramp-form signal while a shift pulse signal is generated when a phase of the sampling pulse train signal is deviated outside a predetermined section of each ramp portion of the ramp-form signal, and utilized for generating the ramp-form signal. By this feature, sampling times of the ramp-form signal are always maintained within the predetermined section of each ramp portion of the ramp-form signal even if a frequency of the input signal deviates very widely from the frequency of the reference frequency signal.

Abstract: In order to reduce a crosstalk component contained in a playback video signal reproduced from a recording medium such as a video disc, method and system for recording a video information comprises a step for recording a video signal in a manner that an absolute value of a difference between a cumulative value of the phase of a recording RF signal of each horizontal scanning period of a first section of recording tracks and a second cumulative value of the phase of the recording RF signal of each horizontal scanning period of a second section of said recording tracks adjacent to said section of recording tracks is controlled to a value (2m+1).pi. (m being a positive integer including 0).