baber/WOPTO huggingface dataset:
Patent KR-20000034179-A (KR)
Title: Liquid crystal display
Inventor: O CHUNG SEOP
IPC: G02F1/1345
Filed: 1998-11-27
Abstract: PURPOSE: A liquid crystal display(LCD) is to prevent a separative fastening member from being used to fix a module for the liquid crystal display on a case. CONSTITUTION: A liquid crystal display comprises a module(10) for the liquid crystal display,and a case for covering upper and lower portions of the module except for a display area. The module includes a panel(12) for displaying data, a blacklight assembly, positioned at a rear side of the panel, for radiating light on the panel, a mold frame(14) for accommodating and supporting the module and the assembly, and a top chassis(15) for covering an upper portion of the panel and a side of the mold. The case includes an upper case for covering an upper portion of the module and a lower case(16) for covering a lower portion of the module. A receiving portion(20) is formed in the side of the top chassis, and a rectangular stopper(22) is formed on an inner side of the lower case.
Patent KR-20000041186-A (KR)
Title: Optical cable
Inventor: SEO GI WON
IPC: H01B11/22
Filed: 1998-12-18
Abstract: PURPOSE: An optical fiber is provided to improve the productivity of the product remarkably by using an optical fiber line, an inner tube, an outer tube, and an auxiliary stretching line. CONSTITUTION: An optical fiber comprises an optical fiber line(10), an inner tube(21), an outer tube(23), and an auxiliary stretching line(22). A first coating layer(13) is formed in the optical fiber line(10). The fist coating layer(13) is coated on the outer surface of an optical fiber spiral which is comprised of a core(11) and a clad layer(12). The optical fiber line(10) is inserted into the inner tube(21). The outer tube(23) is separated from the inner tube by a distance. The auxiliary stretching line(22) is disposed between the inner tube(21) and the outer tube(23).
Patent KR-20000041558-A (KR)
Title: Cyclone cleaner
Inventor: SHIN BYUNG YEOP
IPC: A47L9/16
Filed: 1998-12-23
Abstract: PURPOSE: A cyclone cleaner is provided to enhance dust collecting efficiency by increasing RPM(revolution per minute) and inertia and reducing friction force of rotating currents in a dust collecting chamber. CONSTITUTION: A second gear(211) rotates by turning on a driving motor(210). A first gear(121) also rotates through the rotation of the second gear. The dust in a collecting chamber(110) rotates in the same direction as a rotary wall(120) as the wall rotates following the first gear. Therefore, the friction loss of the currents is minimized and the fine dust with sufficient centrifugal force is piled up on the bottom of the collecting chamber as well as only air is discharged through an outlet of the motor.
Patent KR-20000042629-A (KR)
Title: Booster type converter for controlling a parallel drive power-factor
Inventor: JEONG YONG CHAE
IPC: H02M7/08
Filed: 1998-12-26
Abstract: PURPOSE: A booster type converter for controlling a parallel drive power-factor is provided to lower the product cost with a low current rating of a switching device by reducing the current flowing in the switching device in half. CONSTITUTION: A rectifier(20) rectifies a commercial voltage and outputs a rectified voltage. A switch(21) improves a power-factor by switching operations with respect to the voltage outputted from the rectifier(20). A capacitor(C) filters a voltage outputted from the switch(21) and supplies the voltage to a load(22). A current detector(23) detects a current to an inductor(L) through the rectifier(20). An input voltage detector(24) detects an input voltage supplied to the load(22) from the rectifier(20). An output voltage detector(25) detects a voltage supplied to the load(22).
Patent KR-20000046673-A (KR)
Title: Stator structure of brushless dc motor
Inventor: KIM TAE HYEONG
IPC: H02K1/16
Filed: 1998-12-31
Abstract: PURPOSE: A rotor is provided to reduce the cogging torque with simple structure. CONSTITUTION: A cogging frequency of the cogging torque is generated according to the least common multiple of the number of rotor teeth and poles of the permanent magnet. Then the frequency wave of the cogging torque is formed by overlapping the wave generated by each teeth. The structure installs the teeth(A-L) of the rotor placed with irregular space to compensate the wave of cogging torque. For example, the motor with 36 slots and 48 poles, i.e. the least common multiple is 144, has a cogging period of 2.5 mechanical angle. Then 3 slots generates the wave having a period of 2.5 mechanical angle so 12 teeth sets(A-L) comprising 3 teeth are placed on the circumference of the rotor as shifting each teeth set as much as 2.5/12 mechanical angle.
Patent KR-19990029026-A (KR)
Title: 보상기, 액정 표시 장치 및 감속 호일
IPC: G02B5/30
Filed: 1997-04-30
Abstract: 경사진 광주축을 갖는 감속 호일과, 추가로 제 2의 광학적 활성층을 포함하는 (예컨대 액정 표시 장치용) 보상기는 감속 호일과 제 2 층을 투명 지지판의 다른 측면상에 제공함으로써 간단하게 제조될 수 있다.
Patent KR-19990036324-A (KR)
Title: 피리미딘-4-온 유도체, 제초제로서의 그의 용도, 그의 제조용중간체, 및 이들 화합물의 제조 방법
IPC: C07D239/36
Filed: 1996-08-01
Abstract: 본 발명은 제초제의 활성 성분으로서 유용한, 화학식[1] 의 피리미딘-4-온 유도체에 관한 것인데,  여기서,  R 1 은 수소 또는 알킬;  R 2 는 할로겐 원자로 임의로 치환된 알킬;  R 3 는 할로겐으로 임의로 치환된 알킬, 알케닐 또는 알키닐;  Q 는 치환된 페닐이다.     또한,  그의 제조용 중간체 및 이들 중간체의 제조 방법에 관한 것이다.
Patent KR-19990067541-A (KR)
IPC: C04B41/87
Filed: 1996-10-14
Abstract: PCT No. PCT/FR96/01598 Sec. 371 Date May 13, 1998 Sec. 102(e) Date May 13, 1998 PCT Filed Oct. 14, 1996 PCT Pub. No. WO97/18176 PCT Pub. Date May 22, 1997A plurality of substrates (10) are disposed in alternation and in contact with layers (12) which constitute sources of metal-based composition, each layer comprising a majority phase formed by the metal-based composition and a minority phase suitable for forming a structure for retaining and draining the metal-based composition when it is in the molten state. The batch is heated to a temperature greater than the melting temperature of the metal-based composition such that the metal-based composition in the molten state can migrate from each source through the adjacent surface of the, or each, substrate adjacent to the source towards the inside of the substrate. The invention seeks in particular to incorporate a silicon-based composition in a thermostructural composite material, in particular a carbon-carbon composite material for siliciding purposes.
Patent KR-20000064386-A (KR)
IPC: B65H45/24
Filed: 1996-11-27
Abstract: An improved method is disclosed for forming a strata of overlapping sheets suitable for use in a pop-up dispensing system. The sheets are cut from ribbons which initially have edges essentially parallel to the longitudinal axis of the ribbon. At least one side edge of each ribbon is stretched to form a knee-like protrusion, with the opposing side edge being either, substantially parallel to the longitudinal axis of the ribbon, or also stretched to form one or more knee-like protrusions on the opposing edge. The ribbons are then aligned so that a knee-like protrusion on one edge aligns with either the essentially parallel edge of an adjacent ribbon or a knee-like protrusion on the side edge of an adjacent ribbon. After phasing, the ribbons are overlapped creating a series of predetermined areas of greatest overlap adjoining areas of least or no overlap, such that successive ribbons are bonded only by the interfacial interaction between each ribbon. By overlapping multiple ribbons in this manner a strata is formed which is then folded to interleave the ribbons. A resulting stack of interleaved ribbons is cut in a direction essentially normal to the longitudinal axis of the ribbons at predetermined intervals to form blocks of individual interleaved sheets. The process can be accomplished manually or in a continuous production process.
Patent KR-19990082086-A (KR)
Title: 엠에스에이1 펩타이드의 첨가에 기초한 말라리아 백신
IPC: A61P33/00
Filed: 1997-01-29
Abstract: 본 발명은 열대열원충(Plasmodium falciparum)의 주요한 분열소체(merozoite) 표면 항원 1(MSA1)에 실질적으로 상응하는 단백질 또는 그것의 면역원성 부분을 발현시키는 백시니아 비루스계로 구성된 말라리아 키메릭(chimeric) 펩타이드에 관한 것이다. 바람직한 실시예에서, MSA1 펩타이드는 MSA1의 아미노산 1047부터 1640에 상응하는 593 아미노산 펩타이드이고 시그날 펩타이드 및/또는 앵커(anchor) 펩타이드와 결합된다. MSA1 서열과 결합한 시그날 및 앵커(anchor) 서열을 모두 가지는 키메릭(chimeric) 펩타이드가 예방 접종된 숙주로부터 면역 반응을 유도하는데 가장 효과적이었다.
Patent KR-20000010574-A (KR)
Title: Method and apparatus for eliminating the spirality in knitted fabric
Inventor: KIVIMEKI KEIJO
IPC: D06C5/00
Filed: 1997-04-14
Abstract: PURPOSE: A method and an apparatus for eliminating a spirality in a knitted fabric are provided to include a loop forming component such as a needle and a sinker and to include a receiving component for storing the manufactured fabric. CONSTITUTION: The invention relates to a method for manufacturing and/or treating a fabric, knitting in particular, preferably for producing a single-jersey fabric, a derivative thereof or the like, is carried out with a knitting machine, such as a circular, flat-bed, straight-bar, loop-wheel machine or the like, comprising at least knitting elements (1), such as yarn supply elements and loop forming elements (1a), such as needles, sinkers and/or the like, incorporation therewith for producing a fabric from continuous yarn, such as one or a plurality of untwisted, S-, Z-twisted yarns and/or alike yarn, by knitting, and take-up elements (2) for receiving the resulting fabric. The spirality of an obtained fabric is eliminated at a first stage (A) on one hand by altering the number of twists/unit of length and/or the relative length of distortion-causing loop legs, whereafter the obtained fabric is on the other hand at a second stage (B), preferably during the course of fabric finishing or alike operation, subjected to at least one after-treatment, wherein the fabric is straightened in terms of its wales and/or courses for resetting the loop legs to a substantially equal length. The invention also relates to an apparatus for implementing the method.
Patent KR-20000010881-A (KR)
Title: Method of treatment
Inventor: TOVEY MICHAEL GERARD
IPC: A61K38/21
Filed: 1997-05-05
Abstract: PURPOSE: A method for stimulating a host defense mechanism to a pathological disease by administering an interferon through an oromucosal contact. CONSTITUTION: A method for increasing a treating numeral index of an interferon by administering the interferon via oromucosal contact treats an autoimmune disease, a micobacteria disease, a neural system degenerating disease, a neoplastic disease, and a virus infection by administering an effective amount of interferon through an oromucosal contact. The method can be used for treating autoimmune diseases such as an arthritis, I typed diabetes, and a multiple scleroma, micobacteria disease such as a leprosy and a tubercle, a neural system degenerating disease such as Creutzfeldt-Jakob disease, and virus diseases such as acaulis cancer, hepatitis B, hepatitis C, HIV, HPV, HSV-1, and HSV-2.
Patent KR-20000022473-A (KR)
Title: Injection device and method for its operation
Inventor: HJERTMAN BIRGER
IPC: A61M5/315
Filed: 1997-06-18
Abstract: PURPOSE: A device is provided for the convenience of movement, the device of suitable size, the method for operation, to reduce the risk of misuse, for the improved self control and multi chamber cartridge. CONSTITUTION: An injection device comprising: a) a housing; b) a cartridge containing a preparation or precursor components for the preparation and having a front part and a rear part defining a general cartridge axis, an outlet for the preparation arranged at the front part and at least one movable wall arranged between the front part and the rear part, a displacement of which wall causes the preparation to be moved towards or expelled through the outlet; c)a piston rod, having a first end and a second end, at least partly contained within the housing and being operable to engage and displace the movable wall at its first end; and d) actuating means within the housing arranged to move at least the rod. According to the invention the device comprises gripping means connected to the housing and arranged to hold the cartridge, or an enclosure therefor, with its front part distal and its rear part proximal to the housing, the actuating means being arranged to move the gripping means so as to move the cartridge, with its rear part leading, relative the housing, locking means able to lock the cartridge against axial movements relative to the housing, hereby defining a locked position for the cartridge, the actuating means being able to move the piston rod between at least one retracted position and at least one extended position, and the relative positions between the piston rod in its retracted position and the cartridge in its locked position being such that the piston rod extends into the cartridge. The invention also relates to a method for operating the device.
Patent KR-20000022562-A (KR)
Title: Dynamic drive methods and apparatus for bistable liquid crystal display
Inventor: ZUH YANG MING
IPC: G02F1/137
Filed: 1998-05-06
Abstract: PURPOSE: An electronic driving system is provided to update display information swiftly with a bistable charily mantic liquid crystal material. CONSTITUTION: A display state of the pixel under the polar(60a) is controlled by the voltage gap between the polar(80a) and the polar(60a), and three polars(80a,80b,80c) are connected with each other, because of the electronic lead connected to the input of the edge. According to the material of LCD, voltage gap between the polar(80a) and the polar(60a) is controlled and optical chracter of the pixels is controlled selectively.
Patent KR-19990064433-A (KR)
Title: 편침 제조기의 편침 이동장치
IPC: B23P17/00
Filed: 1999-02-02
Abstract: 본 발명은 편침제조기의 편침 이동장치에 관한 것으로서, 설치판(1) 상면에 원형으로 구성되는 편침 투입부(A)와; 절단부(A1)와; 스웨징부(B)와; 옆눌림부(C)와; 바로잡기부(D)와; 끝깍기부(E)와; 배출부(F) 중앙에 장치되는 회전원판(10)을 가공부(A1)(B)(C)(D)(E)를 작동용 작동축(3)의 편심환판(3a)의 와이어(16)로 당겨지는 래짓(153)으로 회전되게하는 회전원판(10) 회동장치와; 회전원판(10)상면에 장치되는 바이스(40)는 회전원판(10) 중앙을 관통하는 승강축(30)이 상승하므로서 바이스(40)가 전진되도록 하고 승강축(30)은 회전부(501)가 외측의 회전지지대(63)에 연결고정되는 시이소대(50) 일측단을 승강축(30)하단에 고정되게 하고 타측단은 모터(60)로 회전하는 승강캠(47)에 의해 승강되는 승강봉(62)하단에 접촉되게하여 승강봉(62)이 승강하므로서 회전하는 시이소대(50)의 일측단으로 승강축(30)을 상승되게하는 전진작동장치와; 회전원판(10)의 장치홈(101)일측부에 통공(102)을 형성한 후 안내관(45)을 관통 결착시키며 안내관(45)의 중심부로는 캠(47)작동에 의해 승강하는 승강밀봉(46)을 관통시켜 전진하는 바이스(40)의 물림작동판(41)에 형성되는 경사면부(411)를 밀수 있게하는 바이스(40) 작동장치로 구성하여 편침 제조에 필요한 일련의 여러 가공공정에 편침의 투입과 인출이 정확하게 실시되게하여 편침의 불량률을 낮출수 있게함과 동시에 작업의 능률을 높일수 있도록 한 것이다.
Patent KR-19990077405-A (KR)
Title: 반도체기억장치
IPC: G11C16/16
Filed: 1999-02-05
Abstract: 본 발명은 불휘발성 셀에 데이터를 기억하는 반도체 장치에 관한 것이며, 소거 회수를 간단한 구성으로 용이하게 인식할 수 있는 반도체 기억 장치를 제공하는 것을 목적으로 한다. 
     소거 회수 기억 셀을 설치하고, 소거 회수 기억 셀을 불휘발성 셀 어레이의 소거시와 동시에 소거하여, 소거 회수 기억 셀의 임계치를 검출함으로써 소거 회수를 인식한다.
Patent KR-20000055447-A (KR)
Inventor: JEONG HAE RYONG
IPC: C04B35/515
Filed: 1999-02-06
Abstract: PURPOSE: A method of manufacturing fireproof and corrosionproof carbon brick is provided to obtain a carbon brick having excellent acid proof property and intensity. Highly purified graphite material and metallic silicon and thermosetting resin are used as starting materials. And treated at below the temperature existing, therefore profitable at energy economy. By simplifying manufacturing process, reduced at manufacturing cost. CONSTITUTION: A method is processed to obtain fireproof and corrosionproof brick by calcining at 1,200-1,700°C for 3-72 hours at reducing atmosphere after molding, by means of mixing graphitized carbonic material 30-95 weight percent, metallic silicon 2-25 weight percent, at least one of amorphous carbon, crystalline flake graphite or graphite, metal oxide 2-20 weight percent and thermosetting resin 3-15 weight percent. During roasting, carbon the main material reacts with metallic silicon to form beta silicon carbide and nitride silicone, followed by crystallization with particle to particle. And carbon monoxide reacts with metallic silicon to form beta silicon carbide intensify binding intensity. And silicon carbide whisker or fiber unites a large graphite particle with a small graphite particle.
Patent KR-19990064444-A (KR)
Title: 유동층 효과를 이용한 공업용 세척장치
Filed: 1999-02-12
Abstract: 본 발명은 유동층 효과를 이용한 공업용 세척장치에 관한 것으로서, 상부로 개구가 형성된 상자형 구조를 지니고, 주변으로의 열전달을 차단하는 단열재(12)로 감싸진 세척조(11); 상기 세척조(11) 및 단열재(12) 상에 복수로 배치되고, 그 내부 공간 상에서 충진되는 세척용 유체를 가열하는 히터(14);  상기 세척조(11)의 바닥면을 구성하도록 배치되고, 외부에서 공급되는 공기를 고르게 산포시키는 기공판(13); 그리고 상기 히터(14)의 온도 및 기공판(13)을 통한 공기량을 제어하도록 상기 세척조(11)의 외측으로 설치되는 조절수단을 포함하여 이루어지는 것을 특징으로 함에 따라 플라스틱 제조공정에 사용되는 정밀부품의 세척시 부품에 손상을 주지 않고 신속히 세척하면서도 환경오염을 유발하지 않는 효과가 있다.
Patent KR-20000060171-A (KR)
Inventor: CHOI HYEON IL
IPC: B60W10/06
Filed: 1999-03-12
Abstract: PURPOSE: An engine stall protection method resulted from recognition errors of shift lever position of an electronic control throttle system for a vehicle is provided to prevent engine stalls due to recognition errors of shift lever position. CONSTITUTION: An engine stall protection method resulted from recognition errors of shift lever position of an electronic control throttle system for a vehicle contains the following steps: a step to analyze the driving condition and then to set up a target limit value of throttle opening if the shift lever position recognition of an engine control device and a shifting control device is in error condition; a step to set up a target value of throttle opening respectively in driving and in torque-controlling; a step to compare a smaller value of the target value of throttle opening in driving and the target value of throttle opening in torque-controlling with the target limit value of throttle opening, and to set up a larger value as a target value of throttle opening; a step to control throttle opening according to the target value of throttle opening.
Patent KR-20000060877-A (KR)
Inventor: KANG HAN GI
IPC: F28F27/00
Filed: 1999-03-20
Abstract: PURPOSE: A method for controlling optimum operation of an ice storage thermal system by building load estimation algorithm is provided to improve the work following performance with relation to a change of real building loads for reducing operation time, thereby reducing power consumption and improving dynamic characteristics with relation to a rapid load change. CONSTITUTION: A method for controlling optimum operation of an ice storage thermal system by building load estimation algorithm includes the steps of estimating a real building load by measuring a temperature of brine recovered water at a heat exchanger when load cooling(S101), performing a sole operation of a heat accumulating tub if the estimated building load is below a predetermined limit (about 40%) of a maximum load(S102,S103), and performing a parallel operation if the estimated building load is higher than the predetermined limit, wherein a freezer and the heat accumulator are operated in parallel if the building load is in a predetermined limit (40%-70%)(S104,S105), and two freezer and the heat accumulator are operated in parallel if the building load is higher than the predetermined limit (over 70%)(S106,S107).
Patent KR-19990083175-A (KR)
Title: 반도체 시험 장치
IPC: H03K5/135
Filed: 1999-04-14
Abstract: 본 발명은 가변 지연 수단을 구비하고, 인터리브 구성으로 지연 펄스 신호를 발생하는 반도체 시험 장치에 있어서, 발생 출력하는 지연 펄스 신호의 타이밍 정밀도를 한층 더 향상시킬 수 있는 반도체 시험 장치를 제공하는 것을 목적으로 한다.  이를 위해, 인터리브 상의 수가 L인 구성에 의해 파형 정형한 시험 파형을 발생시키는 반도체 시험 장치에 있어서, 1개의 가변 지연 수단에 의해 L 상으로부터의 지연 정보를 수신하여 지연 정보에 대응하는 지연 펄스 신호를 순차 생성하여 출력하는 반도체 시험 장치가 제공된다.
Patent KR-20000073067-A (KR)
Inventor: YI WON HO
IPC: E04C3/26
Filed: 1999-05-04
Abstract: PURPOSE: A construction method for an edge-fix single span composite beam structure is provided so that a pre-flex beam and a RC column are in monolith. CONSTITUTION: A construction method comprises the steps of; installing an I steel beam in a loading frame; loading the load which corresponds the designed load to correspond to the most disadvantageous moment; concreting casing concrete in lower flange and then curing; removing the load and pre-stressing the casing concrete; assembling a lower main-bar in the edge of PB beam to be anchored in the RC column, and manufacturing the edge fix PB beam; carrying to the building site and assembling; and concreting the slab and the web concrete and then curing.
Patent KR-20000074563-A (KR)
Inventor: LEE SANG SOO
IPC: B28C1/10
Filed: 1999-05-21
Abstract: PURPOSE: A production method of a bathing composition using clay having abundant active principles with herbal materials and bioceramic and germanium emitting far-infrared rays is provided, to remove a bad smell, promote metabolism, and enhance moisture content and softness of the skin. CONSTITUTION: The bathing composition is prepared by mixing oceanic clay and continental clay in a ratio of 7:3 or 6:4; pulverizing 0.25-0.5wt% each of mugwort, Armeniacae Semen, and mung bean, 0.125-0.25wt% each of ginseng, Dryobalanops aromatica Gaertn. f., and menthol, and 0.25-0.5wt% each of bioceramic and germanium; adding the powdered materials to 95.25-97.625wt% of the mixture of oceanic clay and continental clay; adding 0.125-0.25wt% each of aloe juice and honey and 0.25-0.5wt% each of Japanese apricot wine and vinegar; and then stirring the mixture.
Patent KR-20000075051-A (KR)
Title: Combination a boiler coldness and warmth wind
Inventor: YOON WEON HO
IPC: F24H1/00
Filed: 1999-05-28
Abstract: PURPOSE: A boiler for both use of cold wind and hot wind, which is an electric boiler being capable of heating and cooling, is provided to generate cold wind and hot wind by using cold water and hot water. CONSTITUTION: A boiler for both use of cold wind and hot wind blows warm wind to the interior by circulating heating water in a hot water tank(6) heated by an electric heater(7) to a fan heater(5). The boiler comprises a cooling device(30) consisted of an evaporator(31), a condenser(33), and a compressor(32); a cold water tank(20), water contained in the tank being cooled by the evaporator(31) of the cooling device(30); electronic valves(21, 22) mounted to an inlet pipe(9) and outlet pipe(10), respectively, through which cooled water in the cold water tank(20) is circulated to the fan heater(5); and electronic valves(11, 12) mounted to an inlet pipe(9) and outlet pipe(10) through which heated water in a hot water tank(6) is circulated to the fan heater(5).
Patent KR-20010001090-A (KR)
Inventor: KIM YOUNG GAG
IPC: F02N11/10
Filed: 1999-06-01
Abstract: PURPOSE: A circuit for preventing a rapid start of a vehicle and malfunction of electronic circuits absorbs induced current caused from a starter motor. CONSTITUTION: A rapid start of a vehicle seldom occurs now because of malfunction of electric circuits in the vehicle, and the malfunction is caused from induced current. A condenser, a resistant, and a coil are composed between a starter motor and a power supply as a circuit. When the induced current occurs, the condenser absorbs the induced current and prevents the malfunction of the electric circuits in the automobile. Therefore, the rapid start caused from the malfunction of the circuits in the vehicle is prevented.
Patent KR-20010001911-A (KR)
Inventor: AHN MIN
IPC: F24F1/00
Filed: 1999-06-09
Abstract: PURPOSE: An air conditioner is provided to reduce assembly process and parts count. CONSTITUTION: A cabinet(51) has at a lower portion thereof an air inlet opening, and at an upper portion thereof an air outlet opening. The cabinet further has at an upper interior thereof a heat exchanger(53) for heat-exchanging between an air and a refrigerant, and a blower(54) installed beneath the heat exchanger and which supplies air to the heat exchanger. A housing(55) for protecting the blower from an external impact and forming a flow channel for the air being sucked and discharged through the blower, is installed around the blower, and a safety mesh(57) is arranged at a front surface of the housing, in such a manner that the housing and the safety mesh are incorporated into a single unit. The safety mesh arranged at the lower front surface of the cabinet serves to prevent accident which may possibly occur when a suction grille for passing air into the cabinet by the operation of the blower is open, and also serves to protect the blower from foreign substance of relatively large size. The housing and the safety mesh are made up of steel or resin, and incorporated into a single unit through an injection molding.