| Patent Number |
Title Of Patent |
Date Issued |
| 5033085 |
Method for controlling video and audio of a television set |
July 16, 1991 |
| A method for controlling video and audio of a television set using a code in such a manner that a code is set up in a microcomputer of the television set, which is operated normally only when the code is released by input of a key signal corresponding to the code, to output the video |
| 5032709 |
Magnetic card |
July 16, 1991 |
| A magnetic card manufactured according to the present invention is composed of a base film; a first magnetic material coating layer applied on the base film for reading and writing variable information held in the magnetic card; and a second magnetic material coating layer applied on the |
| 5031051 |
Still/slow circuit for a VCR with two heads |
July 9, 1991 |
| A still/slow circuit for use in a two-head type VCR includes a digital counter for counting slow indication signals, a pulse oscillator for outputting slow drive control signals in response to outputs of the digital counter, an envelope detector for integrating playback video signals |
| 5028771 |
Bar code reader |
July 2, 1991 |
| A bar code reader includes a hologram disk having an arcuate circular shaped hologram disk disposed on a disk where the laser beam from a laser beam generator is applied. A laser controller is used for controlling the generating of the laser beam, and included are a signal analyzing unit |
| 5022604 |
Reel servo device for video cassette recorder in direct drive reel system |
June 11, 1991 |
| A reel servo device for a video cassette recorder with a direct drive reel system, which carries out smoothly fast forward and fast rewind operations by distributing properly the load carried to the supply reel motor and the take-up reel motor. The current through the driving reel motor, |
| 5020145 |
AM/FM band selector |
May 28, 1991 |
| An AM/FM band selector is provided for selecting AM and FM bands by a single band switch. By using only a single band switch, power consuming parts are eliminated so that power consumption of the selector is reduced. Also, impulse noise which occurs when selecting bands and switching on |
| 5016236 |
Disc loading apparatus for a vertical type compact disc player |
May 14, 1991 |
| A disc loading apparatus for a compact disc player capable of loading compatibly the 8 cm compact disc and 12 cm compact disc safely and conveniently without any worry for mistaking to accord the center of disc with that of turn table. The invention is comprised of: right and left si |
| 5015868 |
Real time distance sensor |
May 14, 1991 |
| A real time distance sensor for measuring distance by calculating the position of image of reflected laser beams with an extremely high-speed, includes a detection module containing a light receiving lens, an infrared ray filter, a CCD sensor, a lens system, and a laser; and a processing |
| 5010734 |
Cooling system for a stirling engine |
April 30, 1991 |
| A cooling system for a Stirling engine which includes a cooler, an ultrasonic wave generator for making cooling fluid into atomized particles, a water tank, a pump and an electric power generator for generating electric power by driving force of the Stirling engine to supply the elec |
| 5005748 |
Impedance roller structure for VCR |
April 9, 1991 |
| An impedance roller for use in VCR which includes an inertia spring damper member defining a plurality of inertia masses and a plurality of elastic members connected to each other and disposed between a hub and a roller boss of the impedance roller for absorbing the vibration of the tape |
| 5004881 |
Method and circuit for controlling power level in the electromagnetic induction cooker |
April 2, 1991 |
| A method and circuit controls the power level in an EI cooker by using a combination of time duty ratio control and pulse width modulation control depending upon the power level established by the user. When the power level is low, the turning on and off of the power transistor is contro |
| 5004360 |
Carriage device for an electronic typewriter using a two-row daisy wheel |
April 2, 1991 |
| A carriage for an electronic typewriter using a 2-row daisy wheel includes a slant bracket pivotally connected to a rail disposed on a main frame, a vibrator movable upward and downward to the main frame, a take-up wheel and a supply wheel around which the correction tape is wound, a pri |
| 5003418 |
Reel-driving clutch assembly for a magnetic recording and reproducing apparatus |
March 26, 1991 |
| A reel-driving clutch assembly for a magnetic recording and reproducing apparatus comprises an intermediary gear and a belt pulley both having cylindrical extensions meshed each other through a recess and a slant surface provided with the intermediary and first and second protrusions |
| 5003396 |
Black and white monitoring system for use in a remote controller |
March 26, 1991 |
| A black and white monitoring system apparatus for use in a remote controller having a light receiver, an analog multiplexer, a signal level controller, an analog switching member, A/D converters, latches, parallel/serial converters, a control signal generator, a first oscillator, an |
| 5003261 |
Rotation detection circuit having input pulse signals for a step motor |
March 26, 1991 |
| A rotation angle detection circuit for a step motor providing an up/down control signal for determining positive and negative rotation of the step motor and a mask control signal for determining rotation angle of 15.degree. and 30.degree.. The circuit can correctly detect the rotation |
| 5001555 |
Stereoscopic television broadcasting system and a stereoscopic television receiver |
March 19, 1991 |
| A stereoscopic television broadcasting system is provided which can televise the stereoscopic broadcasting of the left video and right video through two channels at the broadcasting station by inserting stereoscopic program data, left/right data and frequency data into the vertical retra |
| 4999482 |
Optical scanning system for a bar code reader |
March 12, 1991 |
| An optical scanning system of a bar code reader utilizing a hologram scanner in which a laser beam from a laser beam generator is divided into three parallel paths by three beam splitters. The beams pass through three focusing lenses and first reflectors. Each of the beams are focused in |
| 4991933 |
Front projection screen |
February 12, 1991 |
| A front projection screen includes front and rear refractive facets. The rear refractive facets are coated with refractive coating layers for reflecting an image light which has penetrated through the front refractive facets toward the front refractive facets. Upper and lower flanks |
| 4991917 |
Holographic scanning system for laser printer |
February 12, 1991 |
| A laser scanning system for a laser printer comprises a hologram scanner for scanning and focusing a laser beam and a convex lens for compensating the focusing locus of the laser beam into a straight line and for making the scanning speed uniform, whereby the whole construction of the sy |
| 4988056 |
Reel motor braking apparatus for video cassette tape recorder |
January 29, 1991 |
| A reel motor braking apparatus for a video cassette tape recorder which can perform the braking of a supply reel and take-up reel speedily even if the termination of a tape has failed to be detected due to a failure of a termination sensor or a poor quality of tape. In the apparatus a co |
| 4986109 |
Abrasion-proof tester |
January 22, 1991 |
| An abrasion-proof tester for analyzing granularity of abraded powder includes abrasive material adhered on a abrasive plate fixed on a driving shaft of a variable speed motor is closely contacted with test pieces supported by supporter which is resiliently supported and uniformly pre |
| 4984105 |
Cassette loading device for front loading VCR which utilizes the driving force of a capstan moto |
January 8, 1991 |
| A cassette loading device for a VCR which is designed to load and eject a cassette by making common use of the driving force of a capstan motor. The cassette loading or ejecting operation by the driving force of the capstan motor is conducted by a driving force conversion unit comprising |
| 4979801 |
Rear projection screen having a wide-ranged extinguishing rate for use in a TV receiver |
December 25, 1990 |
| A rear projection screen having a wide-ranged extinguishing rate in which an area of portion for extinguishing the illumination light from exterior of the rear side of screen is widened so that the high contrast can be maintained, which includes a first sheet formed with Fresnel's lens a |
| 4979123 |
Apparatus for determining concentrations of mineral elements |
December 18, 1990 |
| An apparatus for determining concentrations of mineral elements comprising an improved spectrometer wherein the spectrometer functions to diffract the light to be measured by means of a rotary grating and to determine the strength of light by using a single PM tube and further detects th |
| 4978202 |
Laser scanning system for displaying a three-dimensional color image |
December 18, 1990 |
| A laser scanning system includes a read light emitting member, a green light emitting member, a blue emitting member, a scanning light member, and a controller. The red, green and blue emitting light members include an optical-frequency modulator and a liquid crystal plate placed between |
| 4972283 |
Rotary head drum for a VCR |
November 20, 1990 |
| A rotary head drum for a VCR using a fluid dynamic pressure bearing comprising a lower drum fixed to a base plate, a rotary shaft attached to the center of the lower drum, an upper drum fixed to a flange, a rotary head fixed to the upper drum to record and reproduce video signal in and |
| 4960385 |
Cathode-ray tube socket |
October 2, 1990 |
| A cathode-ray tube socket comprising a terminal board including a plurality of radial grooves and a circular groove disposed at the middle portion of the radial grooves and cutting across the radial grooves, the circular groove having a plurality of projecting members and a cap cover for |
| 4956712 |
Apparatus for delaying a sub-aural signal in a television receiver |
September 11, 1990 |
| An apparatus for delaying a sub-aural (i.e., subchannel) signal in a television receiver of a sound multiplex system is provided, which is capable of outputting the sub-aural signal later than the main aural signal by a predetermined time interval. The apparatus is provided with a de |
| 4954464 |
Low temperature sintered dielectric ceramic composition |
September 4, 1990 |
| A dielectric ceramic composition for sintering at a low temperature for use in capacitors which comprises a dielectric ceramic composition represented by the formula (Pb(Zr.sub.1/2 Ti.sub.1/2)O.sub.3)x, (Pb(Mn.sub.1/2 W.sub.1/2)O.sub.3)y and (Pb(Zn.sub.1/2 W.sub.1/2)O.sub.3)z, wherein x |
| 4948939 |
Laser welding method of steel plate and steel ingot |
August 14, 1990 |
| A laser welding method of weldment, for the steel plates less than 1 mm thick, to make several through holes whose diameter is less than 1 mm, to fix the first weldment on the second weldment, and to irradiate laser beam of Nd-YAG laser generator through condensing lens and holes on the |
| 4947263 |
Image signal selector for television receiver combined with video cassette recorder |
August 7, 1990 |
| The invention provides a device that selects the input image signal out of image signals of a TV set, VCR and an external apparatus in the TV with VCR. The device includes two ICs for switches Nos. 1 and 2, muting circuits 4 and 5, inverters 8, image signal insulation section 12, LED |
| 4946600 |
Water repurification method of city water and its equipment |
August 7, 1990 |
| A method of repurifying water from a public supply, comprising the steps of:taking water to be repurified continuously from the public supply;filtering the water slowly through a volume of particulate material; andaccumulating the filtered water to provide a store of repurified water for lat |
| 4946148 |
Leaf spring for supporting reels of a video tape cassette |
August 7, 1990 |
| A leaf spring for supporting supply and take-up reels of a video tape cassette which has a narrow and uniform width on the whole while having a proper tensional force suitable for supporting the reels, whereby the leaf spring prevents a tape from badly travelling by maintaining the rotat |
| 4941061 |
Noise-free skip search apparatus utilizing a piezo-electric element |
July 10, 1990 |
| A noise-free skip search apparatus utilizing a piezo-electric element wherein no noise appears on the screen at the high reproducing speed of a VCR. In the apparatus, a piezo-electric element is shifted according to a multiple angular speed for controlling the angle of reproducing head. |
| 4941058 |
Data signal recording/reproduction apparatus of a VCR |
July 10, 1990 |
| An apparatus for recording and reproducing a data signal on or from a video track of a video tape includes an audio control head composed of an audio erasing head, an audio recording/reproduction head, a control signal recording/reproduction head, and an auxiliary reproduction head which |
| 4941047 |
Video signal compensating circuit of a TV/VCR |
July 10, 1990 |
| A video signal compensating circuit for a TV/VCR comprising a first amplifier for amplifying TV video signal which is input from a TV video signal input terminal, a second amplifier for amplifying VCR video signal which is input from VCR video signal input terminal, a control signal |
| 4935826 |
Automatic tracking device for video cassette tape recorder |
June 19, 1990 |
| An automatic tracking device which reproduces the biggest and clearest FM video signals onto a screen utilizes the concept that the width of the video heads are to be formed larger than the track of the video tape. The size of the video signals reproduced from these video heads are compa |
| 4935762 |
Auto/manual switching circuit |
June 19, 1990 |
| An auto/manual changing switch cirucit for an auto-focus circuit which allows the changing of states by a one touch system. To change a video camera from an auto-focus state to a manual focus state, a switch is activated. While in this manual state, the auto-focus state can be tempor |
| 4933787 |
Tape loading device for high-speed search of a VCR |
June 12, 1990 |
| A tape loading device for high-speed search of a VCR which is designed to exactly search out a position of a program recorded on the tape by the user, and it comprises a loading gear provided with a teethless part and a projection, a rotating body provided with a pair of locking jaws spa |
| 4930720 |
Cassette loading device for VCR |
June 5, 1990 |
| A cassette loading device for a VCR which comprises a drive gear meshed with a worm of a cassette loading unit, an up and down lever provided with a bent portion and lifting members, a driven pulley provided with jaws to which the driving force of the capstan motor is transmitted, a rota |
| 4918276 |
Automatic cooking control system for a microwave oven |
April 17, 1990 |
| An automatic cooking control system for a microwave oven having a turntable utilizes an initial operation process which makes the air temperature of a heating chamber by uniformed only operating a fan. The automatic cooking control system further utilizes first stage heating operation pr |
| 4914560 |
Protection circuit for switching mode power supply circuit |
April 3, 1990 |
| A protection circuit for a switching mode power supply circuit which outputs a constant voltage interrupts the ON-OFF switching operation of the switching transistor when an overvoltage state is detected. This protection circuit includes a switching transistor, a diode, a phototransi |
| 4912577 |
Tracking apparatus for VCR |
March 27, 1990 |
| A tracking apparatus for a VCR comprises an operational amplifier comparator for comparing a reference voltage with an integrated drum rotation pulse signal. First and second switches are provided to respectively increase and decrease the value of the reference voltage applied to the |
| 4905543 |
Device for turning a monitor |
March 6, 1990 |
| A device for turning a monitor to a position at which a viewer can comfortably see the monitor. The device comprises a turntable carrying a monitor thereon, a cam shaft adapted to rotate the turntable in a desired direction utilizing a cylindrical cam having at an outer surface thereof |
| 4900988 |
High voltage stabilizing circuit for preventing overheat |
February 13, 1990 |
| A high voltage stabilizing circuit in a monitor, which has various horizontal synchronized frequencies input thereto. The high voltage stabilizing circuit allows the heating of the voltage control transistor to be reduced. |
| 4899026 |
Automatic cooking control system for a microwave oven |
February 6, 1990 |
| An automatic cooking control system for a microwave oven which utilizes an initial operation process that shifts a temperature of inflow air stored in memories to other memories and repeatedly stores a present inflow air temperature in another memory until the present detected inflow air |
| 4894719 |
Synchronizing signal automatic selecting circuit |
January 16, 1990 |
| A synchronizing signal automatic selecting circuit comprising a signal inverter for inverting synchronizing signal from a synchronizing signal separating circuit, a synchronizing signal detector for detecting synchronizing signal when a synchronizing signal is inputted to a horizonta |
| 4894502 |
Automatic cooking control system for a microwave oven |
January 16, 1990 |
| An automatic cooking control system for a microwave oven utilizes an initial operation process which determines an initial operation process which determines a temperature increment compensating portion from a temperature variation and a temperature difference. The system also utiliz |
| 4888077 |
Method of manufacturing an electroluminescence display device |
December 19, 1989 |
| A method of manufacturing an electroluminescence display device capable of displaying a predetermined number of characters comprising a bare chip, a groove for fittingly receiving the bare chip, and a vacuumized space for protecting the bare chip from external influences. Epoxy resin is |
| 4884140 |
Vignetting compensating circuit for a video camera |
November 28, 1989 |
| A vignetting compensating circuit for a video camera utilizing the horizontal synchronizing signal and the vertical synchronizing signal. The circuit prevents vignetting on the screen from a signal generated by a video camera with a zoom lens by obtaining and adding inverse parabolic |
