baber/WOPTO huggingface dataset:
Patent KR-20020039891-A (KR)
Title: Case of folder type multi display device
Inventor: KIM JANG HO
IPC: H04N5/64
Filed: 2000-11-22
Abstract: PURPOSE: A case of a folding type multi-display device is provided to configure one large screen by connecting a multiple display panels, to minimize a non-display area by directly connecting one side of the display panels upon unfolding and make only one side the display panels exposed and the other sides inserted in an internal for stably supporting upon folding. CONSTITUTION: In a panel housing(40), a housing body divides at least two display panels(2,4) into two sides, to respectively accept the display panels(2,4). A support is formed by cutting a sidewall of the housing body at a boundary side to support the display panels(2,4), and installs a protuberance in another sidewall to load the display panels(2,4). An upper cover covers a non-display area of the display panels(2,4) loaded on the support. An aperture is formed to be open to make each one side of the display panels(2,4) contacted with each other in a state that the display panels(2,4) are opened. And a connection unit(6) couples and supports the panel housing(40) to be folded or opened at an angle of at least 180 degrees.
Patent KR-20020040386-A (KR)
Title: An elevator gondora for wall face
Inventor: HARADA MAMORU
IPC: B66B9/16
Filed: 2000-11-24
Abstract: PURPOSE: A gondola moving along a wall face is provided to make the gondola properly moves on the wall face and on an uneven section of the wall face. CONSTITUTION: A gondola(1) is suspended and is liftable along a wall face(W) by a drive unit(3). A support wire(5) is hung on the gondola with specific tension. A combining unit(13) supported on the gondola is combined with the support wire and supports the support wire in the movable state. The combining unit is installed on both support bodies(11) of the gondola. By horizontally rotating the support bodies, the position of the combining unit is changed.
Patent KR-20010062270-A (KR)
Inventor: EGGELING LOTHAR
IPC: C12R1/19
Filed: 2000-12-08
Abstract: PURPOSE: Provided is a fermentative method for producing an L-amino acid, especially L-threonine, by using a Corynebacterium having an attenuated glyA gene. CONSTITUTION: The method for producing the L-amino acid comprises the steps of: (a) culturing a Corynebacterium having an at least attenuated glyA gene and producing a desired L-amino acid; (b) increasing the desired product in a culturing medium or in the cell of the bacterium; and (c) isolating the L-amino acid.
Patent KR-20020045981-A (KR)
Title: E-mail system and method for transmitting e-mail and medium having software programmed to excute said method
Inventor: MUN DONG EOK
Filed: 2000-12-12
Abstract: PURPOSE: A system and a method for transferring an e-mail are provided to send and receive the e-mail between a sender and a receiver without the distortion of e-mail contents by sending the e-mail contents that are converted into an image. CONSTITUTION: A controller displays the interface screen for inputting the e-mail on a browser(S10). The controller checks if a user selects the other language that is different from a language of OS installed to a user terminal(S20). If the user selects the OS language, the controller configures text according to the language which is supported by the OS installed at the terminal and displays the configured text(S30). When the user clicks a mail transfer tap(S40), the controller converts the contents of the e-mail input interface screen into the image(S110), creates the e-mail document containing the image, and sends the e-mail document to an e-mail address of the user(S130). If the user selects the other language which is not supported by the OS, the controller displays the range of the capable language(S50) and supports an interface screen which displays the keyboard corresponding to the language(S70) and loads the fonts of the selected language from a DB to a memory(S80). The controller sets the text as the key input through the interface screen(S90).
Patent KR-20020051328-A (KR)
Title: Acridinium compounds and chemiluminogenic label composition thereof
Inventor: BAIK WOON PHIL
IPC: C09K11/07
Filed: 2000-12-22
Abstract: PURPOSE: Provided are an acridinium compound, which is used as a chemiluminescent agent and excellent in luminescent efficiency and stability, and a chemiluminescent composition using the acridinium compound. CONSTITUTION: The acridinium compound is represented by the formula 1, wherein R1 is methyl or benzyloxy carbonyl ethyl, X is carbon or nitrogen, R2 and R3 are hydrogen, fluoro, methyl, or nitro, R4 is hydrogen, fluoro, methyl, or benzyloxy carbonyl ethyl, and n is 1 or 2. And the chemiluminescent composition comprises 1'-methyl pyridine-4'-yl acridine-9-carboxylate trifluoromethane sulfonate and 1'-methyl pyridine-4'-yl 10-acridinium-9-carboxylate di(trifluoromethane sulfonate) in the weight ratio of 1:2.5.
Patent KR-20020050988-A (KR)
Title: Magnetic powder contained fluorescent pigment and titanium dioxide
Inventor: LEE SI HUN
IPC: C09C1/00
Filed: 2000-12-22
Abstract: PURPOSE: Provided are magnetic particles containing a fluorescent material and a white pigment, which can discriminate billet scratches easily by applying two lamps of ultraviolet rays and visible rays simultaneously and has improved exploring ability of the billet scratches. CONSTITUTION: The magnetic particles contain 50-85wt% of iron powder, 1.8-20wt% of a fluorescent pigment, 10-20wt% of titanium dioxide, 5-30wt% of water-soluble polymers, and additionally 0.01-5wt% of a fluorescent whitening agent. The fluorescent pigment is at least one selected from the group consisting of basic red 001, disperse yellow 082 solvent yellow 044, and pigment green 007. And the water-soluble polymer is at least one selected from the group consisting of arabic rubber, carboxy methyl cellulose, polyacrylic acid, polyvinyl alcohol, and polyethylene glycol.
Patent KR-20020053908-A (KR)
Title: Engine and torque converter clutching apparatus
Inventor: JANG U JIN
IPC: F16H61/00
Filed: 2000-12-26
Abstract: PURPOSE: A connection device of an engine and a torque converter is provided to improve a continued ratio by restricting power transmission of the engine and the torque converter and to prevent shock and sudden start of a car. CONSTITUTION: A connection device of an engine and a torque converter includes a crank shaft of an engine, a housing of a torque converter, and a clutching part(21). The housing of the torque converter is formed at a front end opposed side of the crank shaft. The clutching part is disposed between the crank shaft and the housing to restrict power transmission between the housing and the crank shaft. The clutching part has a driving part(31) formed on the crank shaft, a slave driving part formed on the housing at an opposed side of the driving part, and a connection member(35). The connection member slides by an elastic member(37) and a solenoid(39) to restrict power transmission between the driving part and the slave driving part.
Patent KR-20020052728-A (KR)
Inventor: JUN SEON HO
IPC: C23C2/06
Filed: 2000-12-26
Abstract: PURPOSE: A method for manufacturing a galvanized steel sheet with excellent surface appearance and brightness is provided, which can prevent ripple mark by controlling roughness average of plate to be plated prior to galvanizing treatment on the basis of the thickness of plate and the target thickness of zinc-plated layer. CONSTITUTION: The present invention is characterized in that before galvanizing treatment, Ra(roughness average) is endowed to a steel plate according to the following relation: 0.5x10¬-3xt + 0.066H <= Ra >= 0.4x10¬-3xt + 0.05H where t is the thickness of plate(mm), H is the thickness of zinc layer(μm), and Ra is roughness average of plate(μm).
Patent KR-20010025470-A (KR)
Title: The process of a thiazolidine-4-carboxylic acid salts
Inventor: AHN SEUNG HO
IPC: C07D277/06
Filed: 2000-12-29
Abstract: PURPOSE: A method for producing thiazolidine-4-carboxylic acid salt is provided, thereby arginine thiazolidine carboxylate can be easily produced at room temperature within a short time. CONSTITUTION: The method for producing thiazolidine-4-carboxylic acid salt comprises the steps of: dissolving arginine represented by formula (3) and thiazolidine-4-carboxylic acid in water; filtering the solution and collecting the filtrate; mixing alcohol or nonalcohol crystallizing solvent with the filtrate to produce thiazolidine-4-carboxylic acid arginine salt represented by formula (1), in which alcohol crystallizing solvent is one of methanol, ethanol, propanol, isopropanol, butanol, ethyleneglycol or glycerol and nonalcohol crystallizing solvent is acetone or acetonitrile; and the reaction temperature is room temperature.
Patent KR-20020056708-A (KR)
Title: Driving circuit for liquid crystal display device
Inventor: YOON SANG HO
IPC: G09G3/36
Filed: 2000-12-29
Abstract: PURPOSE: A driving circuit of an LCD device is provided to reduce power consumption by changing an output of a timing controller to a state of high impedance in vertical blank section. CONSTITUTION: An output buffer portion(23) of an LCD device is formed with a plurality of tri-state buffers(23_1,23_2,...23_N). The plural tri-state buffers(23_1,23_2,...23_N) are used for changing outputting states of output data of a logic block(21) to tri-states. The plural tri-state buffers(23_1,23_2,...23_N) are controlled by an EN signal. The plural tri-state buffers(23_1,23_2,...23_N) outputs the output signals of a timing controller if the EN signal is "0". The plural tri-state buffers(23_1,23_2,...23_N) outputs the output signals of a timing controller changes output states of the plural tri-state buffers(23_1,23_2,...23_N) to high impedance states if the EN signal is "1". The timing controller generates the EN signal in a sink mode by using a vertical synchronous signal.
Patent KR-20010096547-A (KR)
Inventor: HASEGAWA TAKASHI
IPC: G06Q20/32
Filed: 2000-12-30
Abstract: PURPOSE: An electronic coupon transaction system is provided to create a new value of a coupon, to form a new market capable of instantly and actively dealing the coupon, and to give a profit to a provider of a product or a service having a coupon and a coupon user by providing an electronic coupon transaction system capable of dealing the coupon safely and fairly. CONSTITUTION: The system includes a coupon issuing device issuing the coupon to a person by electronically generating the coupon and a coupon extinction device terminating the coupon in case that the coupon is used. The electronic coupon use support system includes a personal certification device executing the personal certification by responding a personal certification request transmitted from a portable remote terminal of a customer possessing the coupon, a personal certification result information transmission device transmitting a result of the personal certification and allowing the customer to use the coupon in case that a product sales certificate proving that the product having a coupon is sold to the customer is transmitted to the shop terminal.
Patent KR-20010023870-A (KR)
Title: 모노히드록사메이트의 바나듐 착물 및 이를 포함하는 약제조성물
IPC: A61K31/445
Filed: 1998-09-10
Abstract: 본 발명은 당뇨병 환자에게서 정상혈당을 유도시키고/거나 혈중 글루코오스 농도를 저하시키는데 유용한 하기 화학식 (I)의 모노히드록사메이트 바나듐 착물에 관한 것이다: 
     R-CO-NHOH.X 
     상기 식에서, 
     R은 (i) H 2 N-CH(COY)-(CH 2 ) n - (여기서, n은 1, 2 또는 3이고, Y는 OH 또는 NH 2 임), (ii) H 2 N-CH(COOH)-CH 2 -S-CH 2 - 및 (iii) 피리딜, 피페리딜 또는 테트라히드로이소퀴놀리닐로부터 선택된 잔기이며; X는 바나딜(VO 2+ ), 메타바나데이트(VO 3   - ) 또는 바나데이트(VO 4   3- ) 염으로부터 선택된 바나듐 화합물이다.
Patent KR-20010031633-A (KR)
IPC: G06Q50/00
Filed: 1998-10-28
Abstract: A method and apparatus for diagnosing orthodontic conditions of an individual. The apparatus includes an outer case and a user interface disposed on the outer case for communicating with the individual. The apparatus further has diagnostic hardware including at least one digital camera carried within the case adapted to take a plurality of video images of the teeth and mouth of the individual. The apparatus further has electronic circuitry which is preprogrammed with statistical data for comparison to actual data collected by the diagnostic hardware and transmitted to the electronic circuitry. The circuitry is further adapted to diagnose whether the individual has correctable orthodontic conditions. The apparatus is further adapted to dispense instructions to the individual for receiving proper corrective orthodontic care. The method of the invention includes providing an apparatus adapted to take various digital images of the individual's teeth and mouth. The digital images are analyzed by the electronic circuitry and compared to the statistical data preprogrammed within the apparatus for diagnosing whether the individual has correctable orthodontic conditions. The method further includes the steps of informing the individual as to whether their orthodontic conditions are correctable and instructing the individual on how to correct the orthodontic conditions diagnosed and dispensing an appropriate appliance.
Patent KR-20010033963-A (KR)
IPC: A23L1/30
Filed: 1999-01-14
Abstract: A process for producing substances capable of inducing apoptosis characterized by involving the step of heating at least one compound selected from among the following compounds (a) to (d), provided that uronic acid and/or uronic acid derivatives and compounds containing uronic acid and/or uronic acid derivatives are excluded therefrom: (a) pentoses; (b) pentose derivatives; (c) compounds containing pentoses; and (d) compounds containing pentose derivatives.
Patent KR-20010040482-A (KR)
Title: 3 차원 홀로그래픽 스크린을 구비한 직접 투사형 텔레비전
IPC: G03B21/62
Filed: 1998-01-29
Abstract: 투사형 텔레비전 수상기(10)는 서로 다른 컬러의 각 이미지에 대한 적색(14), 녹색(16), 청색(18)의 이미지 투사기와 적어도 하나의 홀로그램(26)에 의해 형성된 고 이득의 투사 스크린(22)을 포함하는데, 상기 홀로그램(26)은 적어도 하나의 광전송용 판넬(38) 위에 있는 기판(24) 상에 배치되어 있다.  상기 고 이득의 홀로그래픽 스크린(22)은 광범위한 수평 반시청 각도를 갖는 스크린에 의존하지 않고 프레넬과 같은 렌티큘러 스크린보다 증대된 수평 시청 성능을 제공한다.
Patent KR-20010041659-A (KR)
Title: 처리가능한 크린룸용 장갑과 같은 포켓들의 재생 및정화방법과 장치
IPC: A61B19/04
Filed: 1999-03-11
Abstract: 분류스테이션(1)의 하류위치에 배열되는 세척장치(3)가 유출도아(8)를 가지고, 상기 유출도아(8)가 밀봉상태의 용기(9)내부에서 개방되며, 상기 용기의 공기가 공기조화되고, 포켓(2)들이 건조장치(10)를 향해 이동된다.  건조장치의 하류에 구성된 패키지스테이션(13)이 상기 밀봉상태의 용기내부에 배열된다.  따라서 대기에 의한 입자오염이 제한된다. 
     처리가능한 크린룸용 장갑들의 처리작업에 적용.
Patent KR-20010041810-A (KR)
Title: 무선 통신 장치에 있어서의 특성 코드를 사용하기 위한시스템 및 방법
IPC: H04M1/274
Filed: 1999-03-05
Abstract: 무선 통신 장치 (100) 는 일 이상의 사용자가 입력한 수신측 전화 번호를 포함하는 스피드 다이얼 저장 영역 (126) 을 포함한다.     부가적인 메모리 영역 (128) 은 사용자가 입력한 수신측 전화 번호에 부가될 복수의 부가 디지트 집합을 포함한다.     사용자는 일 이상의 부가 디지트 집합을 선택된 사용자가 입력한 수신측 전화 번호에 연관시킨다.     제어 프로세서 (102) 는 사용자가 입력한 수신측 전화 번호가 선택될 때마다 연관된 부가 디지트 집합을 자동으로 부가한다.     부가 디지트 집합은 서비스 제공자에 의해 사전에 프로그래밍되거나 또는 사용자에 의해 프로그래밍될 수 있다.     부가 디지트 집합은 호출자 식별 전송, 호출자 식별 블럭킹, 메세지 대기 취소 등과 같은 기능을 위한 코드를 포함할 수 있다.     또한, 지역 코드, 다른 프리픽스 등과 같은 다른 디지트 집합은 서비스 제공자 또는 사용자에 의해 사전에 프로그래밍될 수 있다.     부가 디지트 집합은 제어 프로세서 (102) 가 선택적으로 디스에이블될 때까지 선택된 사용자가 입력한 수신측 전화 번호로의 후속하는 모든 호출에 부가될 수 있다.     프로세서는 사용자의 수동적인 개입 또는 무선 통신 장치에 전원을 끔으로써 디스에이블될 수 있다.
Patent KR-20010052211-A (KR)
IPC: H01P1/20
Filed: 1999-03-17
Abstract: Notch filter, comprising: a first inductor having a first and second end; first capacitors electrically connected to the first and second ends of the first inductor respectively (101), wherein the first and second capacitors are connected to ground; resonator structures including a second capacitor (108) and a second inductor (109) connected in parallel, wherein for each resonator structure a third capacitor (110) is connected in series to ground from the resonator structure and a fourth capacitor (107) is connected in parallel to the series combination of the resonator structure and third capacitor to ground; and fifth capacitors (105) are electrically connected in series between the first and second resonator structures to the first and second ends of the first inductor.
Patent KR-20010052625-A (KR)
Title: 유체 스트림의 처리방법
IPC: C08G85/00
Filed: 1999-05-14
Abstract: 원하지 않는 화합물을 제거하기 위한 유체 스트림의 처리방법.
Patent KR-20010052712-A (KR)
Title: Ｌａｒ 포스파타제 서브유닛에 대한 항체
IPC: G01N33/573
Filed: 1999-06-07
Abstract: 본 발명은 LAR 포스파타제 서브유닛, 특히 LAR 포스파타제 서브유닛의 세포내 도메인에 특이적인 항체; 이의 생산방법; 상기 항체를 생산하는 세포; 상기 항체를 사용함으로써 LAR/LAR-유도 분자를 정량하고 검사하는 방법; 및 갑상선암을 진단 또는 치료하기 위한 상기 항체의 용도에 관한 것이다.
Patent KR-20010078746-A (KR)
Title: 다층 네트워크를 이용한 신호 분류를 위한 방법 및 장치
IPC: G06N3/04
Filed: 1999-06-23
Abstract: 다층 네트워크를 사용한 신호 분류 방법 및 장치는 입력 신호 피쳐 벡터를 수신하고, 제1 신호 피쳐를 분류하고, 콘텍츄얼 정보를 사용하여 제2 신호 피쳐를 분류하는 것을 포함한다.  다층 네트워크는 제1 층 내의 노드의 활성화 값을 갱신하고, 제2 층 내의 노드의 활성화 값을 갱신하는 완화 프로세스를 적용한다.   다음에 다층 네트워크는 다층 네트워크 내의 노드의 활성화 값에 따라 신호 분류를 발생한다.
Patent KR-20020060885-A (KR)
Inventor: CHOI MUN CHANG
IPC: F04D29/04
Filed: 2001-01-13
Abstract: PURPOSE: A turbo compressor is provided to improve efficiency of the compressor by preventing increase of heat of a driving motor using liquefied refrigerant collected on a bottom of the compressor. CONSTITUTION: A compressor includes a compression part compressing reliably by preventing increase of heat using cooling action of liquefied refrigerant(16) formed on a bottom of the compressor and comprising a driving motor driven by impressed power and cooled down by the liquefied refrigerant, a driving axis(15) rotated by driving of the driving motor, and an impeller, placed on both ends of the driving axis to compress refrigerant taken in; and a casing(13) receiving the compression part and having a port taking in and discharging refrigerant gas.
Patent KR-20020060912-A (KR)
Title: Bonding film cutting device in wafer mounter
Inventor: KONG U HYEON
IPC: H01L23/12
Filed: 2001-01-13
Abstract: PURPOSE: An adhesive film cutter of a wafer mounter is provided to simultaneously cut more than two packages by attaching the packages to an adhesive film, and to efficiently cut a linear portion and a curved portion. CONSTITUTION: The adhesive film cutter includes a film supply unit(100) for supplying an adhesive film(F) from a film drum(120) installed at a body(110), a bonding roller unit(300) for simultaneously bonding a multi-package(P) and a frame by pressing the supplied film by moving forward and backward, and a film cutting unit(400) for cutting the film bonded to the frame by the rotation of an exposed grip. The multi-package is placed on a placing panel(210) by many clamps. The multi-package placed on the placing panel is received in a rectangular hole of a planar angular frame(220). A cutting device installed on a rotor(410) of the film cutting unit cuts the film attached to the angular frame along the margin.
Patent KR-20020063080-A (KR)
Title: System and method for an internet auction
Inventor: LIM SUNG SIK
Filed: 2001-01-26
Abstract: PURPOSE: An internet auction method and system is provided to offer various types of auction services, such as a lottery auction, a multiple price auction, a hidden card auction, a discount auction, a chatting auction, a group auction as well as a general auction so that it can widen a range of a user selection, increase a user satisfaction and activate an internet auction. CONSTITUTION: The method comprises steps of an auction seller registering an article for sale at an auction service site by inputting data needed for a registration(401), a bidder selecting a desired auction type while inputting necessary data(402), the auction service site closing the auction procedure(403, 404), the service site checking if the auction is successful, in a case of a successful auction, determining an auction winner and a winning price, noticing the auction result, and notifying the seller and the winner of the auction result via an e-mail(405, 406), the winner requesting a delivery of the article while remitting corresponding money to an account of the service site, and the service site notifying the remittance of the seller via an e-mail(407), the seller confirming the remittance and delivering the article to the winner, and the winner checking the delivered article(408), and the service site paying the article to the seller(409). In the lottery auction, the service site designates a bidder to a group, draws a lottery for determining one group, and determines as an auction winner the highest price bidder among the group. In the multiple price auction, the bidder offers a multi-stepped price, and the service site determines as an auction winner the highest price bidder at the last step. In the hidden card auction, the service site allows a bidder to participate in the auction once more, and enables the bidder to hide the bidding price and open the price at the last step. In the discount auction, the service site discounts the winning price by a certain ratio. In the discount auction, the service site enables the bidders to chat with other bidders. In the group auction, the service site designates a discount ratio for a bidder group according to the bid amount, and determines as an auction winner the highest price bidder among the group.
Patent KR-20010109466-A (KR)
Title: 가스 터빈용 터빈 베인 세그먼트 및 스테이터 베인 세그먼트
IPC: F01D5/22
Filed: 2001-01-29
Abstract: 터빈 스테이터 베인 세그먼트는 내측 및 외측 벽과 그 사이로 연장되는 베인을 갖는다.  내측 및 외측 벽은 충돌 플레이트를 갖는다.  외측 벽내로 유동하는 증기는 외측 벽 표면을 충돌냉각 하기 위해 충돌플레이트를 관통한다.  사용된 충돌 증기는 베인 벽을 충돌 냉각시키는 삽입체를 갖는 베인의 공동내로 유동한다.  내측 벽 표면의 충돌 냉각과 베인 표면을 충돌 냉각시키는 삽입체를 갖는 복귀 공동을 통하는 복귀를 위해 증기는 충돌 플레이트를 통해 내측 벽내로 유동한다.  후미 노즐 공동에서 유출되는 증기로부터 노즐의 내측 벽 에어로포일 필릿 영역에 인접한 증기 냉각 충돌 구멍을 보호하기 위해 스커트 또는 플랜지 구조가 제공된다.  또한, 플래시 리브 보스와 공동 삽입체 사이의 갭이 그 사이의 후 충돌 냉각 매체의 유동을 최소화하기 위해 조절된다.  이것이 복귀 채널을 통하여 유출하는 유출유동을 실질적으로 한정하게 되고, 또한 충돌 냉각에 악영향을 줄 수 있는 에어로포일의 필릿 영역 주변의 유동을 최소화한다.
Patent KR-20010078170-A (KR)
Title: Method of stripping for latex of vinyl chloride paste resin, stripping apparatus, and vinyl chloride paste resin latex having low concentration of residual monomer
Inventor: MAKINO TSUKASA
IPC: C08F6/14
Filed: 2001-01-30
Abstract: PURPOSE: To provide a method and apparatus for continuous reduced-pressure stripping without reducing productivity wherein foams are broken without deteriorating the quality in stripping unreacted vinyl chloride-based monomer from a vinyl chloride-based paste resin latex and to provide a vinyl chloride-based paste resin latex with reduced residual vinyl chloride monomer. CONSTITUTION: A foam separating tank is provided at an exhaust line of a reduced-pressure recovering tank and the vinyl chloride-based paste resin latex is supplied into the reduced-pressure recovering tank and foams going into the exhaust line is contacted with steam in the exhaust line and/or the foam separating tank to defoam and the vinyl chloride-based paste resin latex is discharged from the foam separating tank to the reduced-pressure recovering tank for continuous reduced-pressure stripping.
Patent KR-20020064595-A (KR)
Title: A auto music stand
Inventor: WOO SANG YONG
IPC: G10G7/00
Filed: 2001-02-02
Abstract: PURPOSE: An automatic music stand is provided to turn over leaves of music book in an accurate manner by permitting the operating plate to move in left and right directions. CONSTITUTION: Each leave of music book is fixed by clips arranged at the front end of a bar(2), and each bar is connected to a gear roller inserted into a fixing shaft. The bar moves in a horizontal direction when a gear roller is engaged with a gear in accordance with the horizontal movement of an operating plate(4) having the gear. The operating plate for rotating the bar at 180 degrees, is divided into two sections and engaged with a pair of decelerating gears which are engaged in parallel with a motor in such a manner that the operating plate moves in a horizontal direction. An adjustment board(8) is arranged at a lower end of the music stand so as to support the music book. The adjustment board is adjustable in a vertical direction in accordance with the size of the music book.