baber/WOPTO huggingface dataset:
Patent KR-19980072117-A (KR)
Title: 다기능 디지탈 계전기
IPC: H02H3/13
Filed: 1998-07-24
Abstract: [목적] 
     다기능 디지탈 계전기로 특히 역상과 결상 및 불평형을 감지 
     [구성] 
     삼상 입력전압을 다이오드(D1∼D6)를 이용하여 정류된 전압을 제너다이오드(Z1,Z2)및 트랜지스터(Q1,Q2)를 이용하여 전압을 강하시켜 정전압을 회로 및 릴레이(RL1)에 공급토록 구성되고, 상기 정전압에 의거 구동되는 마이크로 콘트롤러(U1)의 입력측에 저항(R11∼R22)을 통해 강하된 전압을 인가하며, 가변저항(VR1)에 의해 입력되는 전압 값의 변화를 주어 불평형 전압 값을 설정토록되고, 마이크로 콘트롤러(U1)에서 입력 전압의 상태를 분석한 입력 전압의 이상 여부를 판단하여 발광 다이오드(LED1,LED2)로 표시토록되며 트립시 R,S,T상에 따라 각기 표시수단이 정해지며, 트립시 트랜지스터(Q3)를 Tun-On하여 릴레이(RL1)의 코일을 여자 또는 소자시켜 부하측의 전원을 제어하도록 구성된다.
Patent KR-20000013310-A (KR)
Title: High voltage generating circuit in a semiconductor memory device
Inventor: LEE JUN
IPC: G11C11/413
Filed: 1998-08-06
Abstract: PURPOSE: A high voltage generating circuit is provided to increase a pumping efficiency. CONSTITUTION: The high voltage generating circuit comprises: an oscillating circuit for generating a pulse signal; an input circuit for generating a pair of complementary pulse signals after receiving the pulse signals; a pump circuit for generating a voltage of a first level in its power-up mode in response to the pair of pulse signal and generating a voltage of a second level by pumping the voltage of the first level in its activation mode; and a transfer circuit for transferring the pumped voltage of the second level to an output terminal, the transfer circuit receiving the pumped voltage from the pump circuit and including MOS(Metal Oxide Semiconductor) transistor of which a channel is formed between the input circuit and the output terminal and a bulk is floated.
Patent KR-20000013597-A (KR)
Title: Viscosity damper
Inventor: NEGISI HIDEO
IPC: F16F15/00
Filed: 1998-08-11
Abstract: PURPOSE: A viscosity damper is provided to be fixed to the torsional vibration generating rotary shaft such as a crank shaft, a drive shaft, a propeller shaft, and to reduce the vibration accompanying the rotation of the rotary shaft. CONSTITUTION: The viscosity damper comprises; a housing(1) fixed to the rotary shaft which generates a torsional vibration; taking a shape of a ring formed along the circumference of the rotary shaft, accommodating an inertia ring(2) and a viscous fluid sealed tight in it to form a viscosity damper; an inertia ring(2) movably fixed by way of a bearing(3) along the ring-shaped housing(1); a coil spring(5) installed to the moving direction of the inertia ring(2) between the housing(1) and the stator(4); a penetrating hole(9) formed in the inertia ring(2) to the direction of the radius of the ring to circulate the viscous fluid.
Patent KR-20000019218-A (KR)
Title: Power supply apparatus of device board in exchanger
Inventor: KIM JEONG HEON
IPC: H04Q1/28
Filed: 1998-09-09
Abstract: PURPOSE: A power supply apparatus of a device board in an exchanger is provided to improve high cost and long time generated by exchanging a board itself although a part component of the board is failed. CONSTITUTION: As a component of a device board is failed, a main processor board outputs control signals for turning off only the failed component of the device board. A switching signal generating part(14) generates switching signals by the control signal of the main processor board and the generated switching signals are input to a switching part(16, 18, 20). The switching part comprises a plurality of switching elements whose one end is connected to a power generating part and the other end is connected to components on the device board. A switching element connected to the failed component is turned off and remaining switching elements are turned on by the switching signals of the switching signal generating part. Thus, the remaining components except for the failed component receive an electric power from a power supply part(12).
Patent KR-20000021012-A (KR)
Title: Fixing structure for coma coil of deflection york
Inventor: YANG TAE JONG
IPC: H01J29/76
Filed: 1998-09-25
Abstract: PURPOSE: A fixing structure of coma coil is provided to prevent a separation at all direction. CONSTITUTION: An inserted slot is made at a neck of a separator according to a size of a coma coil. A guiding projection is formed along both sides of the inserted slot. A stopper is made on an entrance of the inserted slot. In both sides of bobbin in which a core is, a guiding recess is incised horizontally. When the guiding recess get in the guiding projection, the guiding projection prevent the coma coil from moving from the inserted slot to the upside and the stopper prevent the coma coil from coming out from the inserted slot.
Patent KR-19990030226-A (KR)
Title: 종료점 검출 방법 및 장치
IPC: H01L21/768
Filed: 1998-09-29
Abstract: 금속 퓨즈 구조와 그 제조 방법이 개시되어 있다.  상기 방법은 금속화 층으로부터 퓨즈 구조를 형성하는 단계, 금속화 층으로부터 형성된 퓨즈 구조 위에 기저 산화물 층 즉, HDP 산화물을 증착하는 단계, 기저 산화물 층 위에 도핑된 산화물 층을 증착하는 단계, 도핑된 산화물 층 위에 상부 산화물 층을 증착하는 단계, 상부 산화물 층을 관통하여 에칭하는 단계, 도핑된 산화물 층이 에칭되기 시작할 때에 방사되는 도펀트 종(species)의 증가된 레벨을 검출하는 단계를 포함하며, 도펀트 종의 증가된 레벨이 검출될 때 에칭을 종료시키는 단계를 더 포함한다.  금속화 층으로부터 형성된 퓨즈 구조 위에는 적어도 기저 산화물 층이 남게 된다.
Patent KR-20000028044-A (KR)
Title: Data transfer device of image conference system
Inventor: SONG BOK CHEON
IPC: H04N7/15
Filed: 1998-10-30
Abstract: PURPOSE: A data transfer device of an image conference system is provided to transmit an image signal and a sound signal individually at the image conference system using an internet television for reducing many problems could be occurred on a transmitting channel. CONSTITUTION: An internet television is operated in an image conference mode by a user's selection. A micro-computer(26) controls a system entirely and makes an image signal and a sound signal to be transmitted to different channels simultaneously. An image input(28) receives an image signal and a sound input(27) gets a sound signal from the conference. The sound signal and the image signal are processed to be able to transfer at a sound signal processing unit(29) and an image signal processing part(30) by a micro-computer(26). After the process, the sound signal is shifted to an internet phone through an internet phone controller(31) and the image signal is carried to image channel of the internet television.
Patent KR-20000038305-A (KR)
Title: Discharge valve assembly
Inventor: PARK JEONG SIK
IPC: F04B39/10
Filed: 1998-12-05
Abstract: PURPOSE: A discharge valve assembly is provided to prevent breakage of parts due to the interference between a discharge valve and a valve spring during repeated discharges of a gas through the discharge valve. CONSTITUTION: A discharge valve assembly includes a discharge cover, a discharge valve(70) and a valve spring(80). The discharge cover has a certain inner space, and a catch portion at an inner portion thereof. The discharge cover is coupled to one side of a cylinder while covering the cylinder. The discharge valve is formed in a predetermined shape and has a coupling projection(72) protruding by a certain height on central portion of a curved surface of a valve body(71) of the discharge valve(70). The discharge valve(70) opens and closes a compression volume(P) of the cylinder. The valve spring(80) is supported on the catch portion at both ends of the valve spring(80) and has a central elongated coupling-hole(81) into which the coupling projection(72) is inserted. The valve spring(80) resiliently supports the movement of the discharge valve(70). The elongated coupling-hole(81) of the valve spring(80) is formed in an elliptical shape. The major diameter of the elliptical coupling-hole(81) is larger than an outer diameter of the coupling projection(72) and the minor diameter of the elliptical coupling-hole(81) corresponds to the outer diameter of the coupling projection(72).
Patent KR-20000040921-A (KR)
Title: Mould flux for manufacturing high weather resistance steel
Inventor: BAEK CHAN JUN
IPC: B22D11/10
Filed: 1998-12-21
Abstract: PURPOSE: Mould flux for manufacturing high weather resistance steel is provided to reduce the break-out of the high weather resistance steel by improving the lubrication for removing friction force between a cast piece and a mould. CONSTITUTION: Mould flux consists of 25-40wt% of CaO(calcium oxide), 25-40wt% of SiO2(silica), 3-8wt% of Al2O3(aluminium oxide), 7-15wt% of Na2O(sodium monoxide), 2-5wt% of free C(carbon), 0.5-3wt% of Fe2O3(ferric oxide) and the rest of other impurities. The mould flux has 5-10% of crystalline ratio.
Patent KR-20000041853-A (KR)
Title: Device and method for testing line by hook dialing from automatic attendant
Inventor: OH BYUNG SEONG
IPC: H04B3/46
Filed: 1998-12-23
Abstract: PURPOSE: A device for testing lines by a hook dialing from an automatic attendant is provided to test lines using on-hook dialing function, and select to test lines not good condition during operation of a system. CONSTITUTION: A device for testing lines by a hook dialing from an automatic attendant, comprises a key input circuit(110), a line selector(120), a processor(100), a Light Emitting Diode(LED) driver(130), a line interface(140), and a speak driver(150). The key input circuit(110) outputs a detecting signal by having an on-hook dialing key and number keys, and by detecting input of an on-hook dialing key. The line selector(120) selects as a transmitting line by searching unused lines after being inputted a predetermined control signal. The processor(100) controls the line selector(120) and the LED driver(130) by being inputted the detecting signal corresponding to the input of the on-hook dialing key. The LED driver(130) drives an LED corresponding to the selected lines. The line interface(140) interfaces the selected lines.
Patent KR-20000042462-A (KR)
Title: Method for bank address scrambling of dram
Inventor: JUNG YONG KWUN
IPC: H01L27/108
Filed: 1998-12-24
Abstract: PURPOSE: A method for bank address scrambling of a DRAM is provided which enables the high speed operation and also realizes the low power operation. CONSTITUTION: A method for bank address scrambling of a DRAM enables the high speed operation by making the frequency in use of an external bank address uniform by using a gray code when performing bank address mapping, and realizes the low power operation by making data toggling be occurred in one bit during self refresh operation. The frequency in use of the external bank address becomes uniform by using binary gray code transform when performing at least bank address scrambling.
Patent KR-20000043753-A (KR)
Title: Apparatus for checking relay and timer operations
Inventor: LEE GYU HEUNG
IPC: H01H50/00
Filed: 1998-12-29
Abstract: PURPOSE: An apparatus for checking relay and timer operations is provided to enhance the maintenance efficiency and to extend the life time of a timer by enabling precise controls with the exact timer setting. CONSTITUTION: An AC power source switching unit(103) supplies the AC power to the entire circuit by a switching function. A DC power source switching unit(110) supplies the DC power to the entire circuit by a switching function. A DC voltage generator(111) converts the AC power to the DC power and adjust the magnitude of the DC voltage for an output. A switching unit(140) supplies the DC voltage to individual relays to be checked by performing the switching operations. A display(150) is connected to the individual relays and displays the operations of the relays.
Patent KR-19990036043-A (KR)
Title: 안경대의 축방향 회전, 자동 복귀 및 추가적 개방기능을 갖는 안경용 경첩(힌지) 장치
IPC: G02C5/22
Filed: 1997-05-29
Abstract: 안경테의 일구성요소를 이루는 제1힌지부재(14) 및 안경대(10)의 일단(10a)과 함께 회전하는 제2힌지부재(16)를 구비하는 형태로 된, 탄성적으로 넓게 벌려지는 막대들을 갖는 안경용 경첩(힌지) 장치에 있어서, 상기 제2힌지부재(16)는 두 개의 대향하는 단부를 갖는 핀(20)을 구비하되 그의 제1단부(20a)는 상기 제1힌지부재(14)에 힌지로 연결되는 한편 제2단부(20b)를 가지며, 또한 하나의 부재(24)는 상기 핀(20)을 따라 활동가능하고 상기 활동가능한 부재(24)와 상기 핀의 단부(20b) 사이에는 탄성수단(26)이 배치되고, 상기 핀(20)에 대해 회전하는 하나의 회전부재(28)가 상기 핀의 제2단부(20b) 상에 배치되며, 상기한 회전부재는 상기 핀에 대해 세로로 고정되어 상기 안경대(10)와 함께 회동가능하게 움직이게끔 구성되고, 상기 활성가능한 부재(24)는 상기 핀(20)에 회전가능하게 고정되고, 상기 탄성수단(26)은 두 개의 대향하는 단부를 갖되 그 중 하나의 제1단부(26a)는 상기 활동가능한 부재(24)에 부착되고 다른 하나의 제2단부(26b)는 상기 회전부재(28)에 부착되어 상기 안경대의 통상 위치에서 시작해 핀(20)의 축 주위로 상기 안경대(10)를 회동시켜서 상기 탄성수단(26)이 비틀림상태로 힘이 가해짐으로써 상기 안경대를 통상위치로 복귀하도록 함을 특징으로 하는 안경용 경첩장치가 제공된다.
Patent KR-19990044453-A (KR)
Title: 타조페론의 교호 결정 형태
IPC: C07D277/14
Filed: 1996-09-03
Abstract: 본 발명은 5.64 Å, 5.16 Å, 4.90 Å, 4.66 Å 및 4.49 Å의 면간격 d를 갖는 X-선 회절 패턴을 갖는 (±)-5-{[3,5-비스(1,1-디메틸에틸)-4-히드록시페닐]메틸}-4-티아졸리디논의 신규한 결정질 형태 II를 제공하며 상기 결정질 형태는 상기를 함유한 제약학적 조성물 뿐만 아니라 신규한 물리적 형태를 사용하여 염증, 염증성 대장 질환, 알러지, 관절염 및 저혈당증의 치료에 유용하다.  형태 II의 타조페론을 제조하는 방법이 기재되어 있다.
Patent KR-19990077007-A (KR)
Title: 절수 디퓨저를 가진 물 분배 시스템
IPC: B05B1/18
Filed: 1997-10-30
Abstract: 사용자가 실재 흐름 율 보다 상당히 더 빠른 흐름 율로 감지되는 절수 디퓨저(water saving diffusers)(1)는, 그 안에 분배 디스크(40)가 격납 되는 하부 챔버 부분(10)과, 하부 챔버 부분(10)에 부착된 가속도 부분(20)을 포함하고, 가속도 부분(20)은 절수 디퓨저(1)로부터 멀티플 스트림 유체 유출 생성용 다수 구멍을 갖는다.  분배 디스크(40)의 중앙 구멍(42)은 주어진 급수 압력용의 특정한 유량 율을 생성하도록 주문에 맞추어 변경될 수 있는 것이다.  절수 디퓨저(1)는 급수 분배 시스템에 사용되어 단일 층 또는 다수 층 빌딩의 전체 구역에 예비 결정된 균일한 유량 율을 제공하는 것이다.
Patent KR-19990077244-A (KR)
IPC: C07C69/34
Filed: 1997-01-16
Abstract: Electrolytic hydrodimeric coupling of dialkyl maleates in alkanol solutions containing an alkanol-soluble alkali metal acetate/quaternary ammonium tetrafluoroborate mixed supporting electrolyte yields tetraalkyl 1,2,3,4-butanetetracarboxylates.
Patent KR-19990081934-A (KR)
Title: 판유리 부착구조 및 유리창
IPC: E06B5/16
Filed: 1997-11-17
Abstract: 본 발명은, 판유리의 주연부를 수용 가능한 요홈부를 구비한 피고정부재에, 판유리를 부착하는 판유리 부착구조에 관한 것이다.  지금까지의 판유리 부착구조에서는, 화재 등의 발생시에 피고정부재로부터 판유리가 빠지기 쉬웠지만, 요홈부(3a)에 판유리(2)가 삽입된 상태에서, 서로 맞물림하여, 상기 피고정부재(3)와, 상기 판유리 주연부에, 상기 판유리(2)가 상기 요홈부(3a)로부터 빠지는 것을 방지하는 한 쌍의 맞물림부(3b,5)가 분산하여 배치되어 있으면, 화재 등의 경우라도, 피고정부재로부터 판유리가 빠지는 것을 방지할 수 있다.
Patent KR-20000064633-A (KR)
Title: 화상 표시 장치의 제조 방법
IPC: H01J9/40
Filed: 1998-01-14
Abstract: 봉입 가스가 고압화된 화상 표시 장치에 대응 가능하게 하고, 양산성이 양호하고 생산성이 높고, 신뢰성이 높은 화상 표시 장치의 제조를 가능하게 한다. 
     소정의 위치에 관통 구멍을 갖는 제1 기판 상에, 소정 간격을 두고 판재가 배치되고 주위가 실부로 밀봉된 밀폐 부재의 관통 구멍의 개구부에 유리관을 접속하고, 유리관 내의 관통 구멍과의 접속부 근방에 보유 부재에 의해 보유된 하소 고형 프릿을 배치하고, 유리관을 통해 밀폐 부재 내를 배기하고, 유리관의 소정 부분을 지름 방향으로 압축하여 잘록부를 형성하고, 이 잘록부와 관통 구멍의 개구부 사이에 하소 고형 프릿을 잔존시켜 하소 고형 프릿을 유리관의 잘록부로 이동시켜, 유리관을 통해 제1 기판과 판재 사이의 간극에 가스를 충전한 후 유리관의 잘록부의 하소 고형 프릿을 용융 고형화시켜 잘록부를 밀봉시킨다.
Patent KR-20000064675-A (KR)
IPC: C25D5/00
Filed: 1996-08-30
Abstract: An electrolytic process for simultaneously cleaning and metal-coating the surface of a workpiece of an electrically conducting material, which process comprises: i) providing an electrolytic cell with a cathode comprising the surface of the workpiece and an anode comprising the metal for metal-coating of the surface of the workpiece; ii) introducing an electrolyte into the zone created between the anode and the cathode by causing it to flow under pressure through at least one opening in the anode and thereby impinge on the cathode; and iii) applying a voltage between the anode and the cathode and operating in a regime in which the electrical current decreases or remains substantially constant with increase in the voltage applied between the anode and the cathode, and in a regime in which discrete gas bubbles are present on the surface of the workpiece during treatment.
Patent KR-20000005191-A (KR)
Title: Positioning system and method
Inventor: SPEASL JERRY A
IPC: G01S19/11
Filed: 1997-01-29
Abstract: PURPOSE: Disclosed is a positioning system for locating objects in places where standard Global Position System (GPS) signals do not penetrate. CONSTITUTION: A first embodiment uses a GPS receiver (54) and a clock recovery unit. A computer (72) receives the positional information and accurate time information. The computer (72) calculates new orbital data for at least four pseudo satellites. The pseudo satellites are antennas positioned in an interior or shielded space and function to send pseudo satellite data to a receiver. In a second embodiment, the positions of the pseudo satellites are provided to the computer (72) without the use of a GPS receiver (54). An accurate clock signal is also provided. The computer (72) calculates orbital data for each pseudo satellite and transmits the time signal and ephemeris data for each pseudo satellite. The time signal is delayed for each pseudo satellite to account for propagation delays due to different connecting cable lengths.
Patent KR-20000010886-A (KR)
Title: Antisense base sequences
Inventor: MARUTA YOSHIYUKI
IPC: C12N15/29
Filed: 1998-03-10
Abstract: PURPOSE: A method for enhancing a technique for repressing a protein synthesis by using an antisense base sequence is provided. CONSTITUTION: A novel technique for enhancing, in the techniques for inhibiting the synthesis of proteins, the inhibitory effects with the use of antisense base sequences. Specifically, antisense base sequences containing two or more sequences of desired structural genes or parts of the same consecutively linked in the antisense direction; expression vectors having the above antisense base sequences; products of transformation by the above expression vectors; and a method for inhibiting the expression of proteins by using the above antisense base sequences.
Patent KR-20000051006-A (KR)
Title: Enhanced inductively coupled plasma reactor
Inventor: O BEOM HWAN
IPC: H01L21/205
Filed: 1999-01-18
Abstract: PURPOSE: An enhanced inductively coupled plasma reactor is to intermittently control magnetic field of axis direction and induce resonance of plasma mode, thereby creating a uniform plasma having high density at a constant frequency. CONSTITUTION: An enhanced inductively coupled plasma reactor comprises: a chamber(60) having a wafer stage(50) on which a wafer(40) is mounted; a power supply part(10,20) for supplying a high frequency power to the chamber; an antenna(30) for creating electric field or magnetic field from the high frequency power supplied from the power supply part; a helmholtz coil(70) having two coils arranged symmetrically with respect to the wafer outside the chamber, and for allowing the electric field and magnetic field created from the antenna to be uniform in the entire region of the chamber; a bias RF power part(90) connected to the wafer stage; and a matching part(100) for transferring an optimized electric power of the bias RF power part.
Patent KR-20000055178-A (KR)
Inventor: LEE SOON SE
IPC: B01D35/02
Filed: 1999-02-04
Abstract: PURPOSE: A booster pump for use of water purifier is provided to achieve a simplified structure and reduced noise and power consumption while allowing the raw water to be fed to a filter or a membrane by a differential pressure. CONSTITUTION: A booster pump comprises a housing(1) having at both upper portions thereof a first raw water inlet pipe(111) and a first raw water outlet pipe(112) and at both lower portions thereof a second raw water inlet pipe(131) and a second raw water outlet pipe(132), an upper diaphragm (31) arranged between a retainer(21) mounted to be slidably to the housing and a sleeve(22) coupled to the retainer(21), the diaphragm(31) having an edge portion fixed to an inner wall of the housing so as to divide the upper portion of the housing into low pressure chamber(16), a valve control unit(27) installed in the low pressure chamber(16) and which controls opening/closing operation of the first raw water inlet pipe and the first raw water outlet pipe in accordance with the vertical movement of the retainer, a lower diaphragm(32) arranged between the sleeve and a lower supporting plate(23) coupled to the lower portion of the sleeve, the lower diaphragm(32) having an edge portion thereof fixed to the inner wall of the housing so as to thereby divide the lower portion of the housing into a high pressure chamber(17), and a bypass pipe(121) for connecting the first raw water outlet pipe with the second raw water outlet pipe.
Patent KR-19990072664-A (KR)
Title: 비수성전해액전지
IPC: H01M10/05
Filed: 1999-02-12
Abstract: 본 발명은 전지가 압착되는 경우의 손상을 최소화할 수 있는 비수성 전해액 전지에 관한 것이다.  본 발명에 따른 비수성 전해액 전지는 양극용 활성 재료가 형성되어 있는 두 면을 갖는 연장된 길이의 양극 집전체 및 음극용 활성 재료가 형성되어 있는 두 면을 갖는 연장된 길이의 음극 집전체를 세퍼레이터를 사이에 두고 감아서 형성시킨 나선형 코일을 포함하며, 상기 양극은 양면에 양극 집전체가 노출되어 있는 양극-집전체 노출 부위가 제공된 종방향 단부를 갖고, 상기 음극은 양면에 음극 집전체가 노출되어 있는 양극-집전체 노출 부위가 제공된 종방향 단부를 가지며, 상기 양극-집전체 노출 부위 및 상기 음극 집전체 노출 부위는 상기 코일을 상기 세퍼레이터를 통해 1회 이상 덮고 있다.
Patent KR-20000059756-A (KR)
Inventor: KIM DAE GI
IPC: C07D487/04
Filed: 1999-03-08
Abstract: PURPOSE: Pyrazolopyrimidinone derivatives are provided which are rapidly absorbed in gastrointestinal duct and which have an inhibiting activity to PDE V in vivo. Therefore, the derivatives are useful to treat impotence and sex-failure as well as various cardiovascular diseases such as angina, hypertension, heart failure and atherosclerosis. CONSTITUTION: The pyrazolopyrimidinone derivatives are represented by formula (1), wherein X represents nitrogen atom or methine group; n is an integer of 0 or 1 to 4; R1 represents hydrogen, C1-C3 alkyl substituted or unsubstituted by one or more fluoro atoms, or C3-C6 cycloalkyl; R2 represents hydrogen, C1-C6 alkyl substituted or unsubstituted by substituent selected from hydroxyl group. C1-C3 alkoxy, C3-C6 cycloalkyl and one or more fluoro atoms, C3-C6 cycloalkyl, C2-C6 alkenyl or C2-C6 alkynyl; R3 represents C1-C6 alkyl substituted or unsubstituted by substituent selected from C3-C6 cycloalkyl and one or more fluoro atoms, C2-C6 alkenyl, C2-C6 alkynyl or C3-C6 cycloalkyl; R4 represents C1-C4 alkyl substituted or unsubstituted by substituent selected from hydroxyl group, one or more fluoro atoms and heterocyclic ring comprising nitrogen atom (wherein, heterocyclic ring is selected from the group consisting of pyrrolidine, piperidine, piperazine, morpholine, pyrrole and imidazole, and the nitrogen atom is not bound to C1-C4 alkyl) or (C1-C5 alkyl) NR5R6; R5 and R6 are same or independently hydrogen, C1-C4 alkyl, C3-C6 cycloalky, or heteroaliphatic or heteroaromatic ring selected from the group consisting of pyrrolidine, piperidine, piperazine, morpholine, pyrrole and imidazole bound with nitrogen atom, wherein the ring is substituted by C1-C3 alkyl, C1-C3 alkoxy, hydroxyl group, or one or more halogen atoms.
Patent KR-19990077797-A (KR)
Title: 전기차 제어 장치
IPC: H02P21/00
Filed: 1999-03-11
Abstract: 전기차 제어 장치는 VVVF 인버터를 구비한 유도 전동기를 제어한다.  제1 연산 수단은 유도 전동기의 벡터 제어용 토크 전류 지령치와 실제 토크 전류치를 기초로 유도 전동기의 로터-저항 보정치를 계산한다.  제2 연산 수단은 로터-저항 보정치와 기준 로터-저항치를 기초로 보정된 로터-저항치를 계산한다.  제3 연산 수단은 보정된 로터-저항치, 기준 로터-저항치, 및 로터 재료에 의해 결정된 온도 계수를 기초로 유도 전동기의 추정 로터 온도를 계산한다.  이에 따라 유도 전동기의 열적 상태는 유도 전동기 상에 온도 센서를 설치하지 않고도 실시간으로 감시된다.
Patent KR-20000060528-A (KR)
Inventor: HONG SEONG CHEON
IPC: E02D29/14
Filed: 1999-03-16
Abstract: PURPOSE: A manhole with escape prevention device is provided to allow a cover of manhole to be automatically locked and opened in convenient and easy way. CONSTITUTION: A manhole comprises a manhole frame(10) having at an inner periphery thereof a loading stopper(12), a manhole cover having a one-side wall(22) at a periphery of a bottom surface of the cover and an open groove(21) at both sides, a stopper groove(16) formed on the loading stopper of the manhole, an operating groove portion(24) formed at an inner bottom surface of an opening(23), a lock member(30) having a front end thereof a stopper end(32) protruded toward the opening and inserted into a stopper groove(16) of the manhole frame, a rear end thereof which is axially and rotatably coupled to a bottom surface of the manhole cover, and at an upper center thereof a stopper(34) moving within the operating groove portion, and a resilient member arranged between the stopper and an inner wall surface of the operating groove portion so as to automatically rotate the lock member toward the opening.