baber/WOPTO huggingface dataset:
Patent KR-20010084650-A (KR)
Title: Method of storing and display transmission result information of fax message
Inventor: CHOI SEUNG YEONG
IPC: H04N1/00
Filed: 2000-02-28
Abstract: PURPOSE: A method for storing and displaying facsimile message transmission result information is provided to display a transmission result of a facsimile message to outside without outputting a recording medium on which a facsimile message transmission result information is printed. CONSTITUTION: User identification information is registered in a server PC. An input of user identification information is requested. Each time a facsimile message transmission is completed, a facsimile message transmission result is transmitted to the server PC together with the input user identification information. A user PC corresponding to the transmitted user identification information is searched and the facsimile message transmission result is reported to the searched user PC.
Patent KR-20010086925-A (KR)
Title: Supersonic waves and ion massager
Inventor: BAE YEONG DON
IPC: A61H23/00
Filed: 2000-03-04
Abstract: PURPOSE: A supersonic ion massage apparatus is provided which can be used without any separate supplementary device by installing a supersonic wave generating part and an ion generating part into a single housing, enables constant generation of ions by removing a separate ground part at an ion generation part, and maximizes effects of the supersonic waves and the ions by varying the vibration of generated supersonic waves and ions. CONSTITUTION: In an apparatus combining supersonic wave generation function and ion generation functions, the supersonic ion massage apparatus comprises a head part (2) at one side of which a supersonic wave vibration plate (11) receiving output of a supersonic wave generation part (10) is formed, and at the front end of which ion output terminals (21,22) of the an ion generation part (20) are formed; a grip body (4) which supports the head part (2) and forms an operating part (40) comprising operating buttons; and a supersonic ion control part driving and controlling the supersonic wave generation part (10) and the ion generation part (20) in the inside of the body (4).
Patent KR-20000030713-A (KR)
Inventor: KIM MAN HAAK
IPC: G09F13/00
Filed: 2000-03-13
Abstract: PURPOSE: A commercial signboard is provided to reduce cost for producing and transferring, to produce the signboard variably and to extend the lifespan of the signboard by radiating from a print layer. CONSTITUTION: A panel layer(1), a print layer(2) of silver electrode, a print layer(3) of radiating body, a print layer(4) of dielectric, a print layer(5) of silver electrode and a print layer(6) of ultra violet ray ink are printed successively for laminating IPO film layers(7,7') strong for heat and temperature on the plate layer and on the print layer of ultra violet ink. And the outer circumferences of the IPO film layers are melted while withdrawing a withdrawing line(8) from the print layers of silver electrode for supplying electric power. When the electric power is supplied to the print layers of the silver electrode, the electric power is induced to the print layer of dielectric for radiating the print layer of radiating body. Therefore, a character or a sign printed on the signboard is recognized by a person.
Patent KR-20000076902-A (KR)
Title: 열교환용수 및 그 공급장치
IPC: C02F5/00
Filed: 2000-03-17
Abstract: 기계설비, 공기, 액체 등의 피열교환체와 열교환을 행하는 열교환용수에 있어서, 공급/순환배관 또는 열교환기 액체접촉부의 금속재료의 산화 열화를 방지하고, 조류나 미생물의 증식을 억제하며, 환경에 우수한 열교환용수를 제공한다.  이 열교환용수는 표준 산화환원 전위가 표준수소전극을 기준전극으로 하여 제로 또는 부의 환원성물이다.
Patent KR-20010091803-A (KR)
Title: Ion implanter preventing excessive thermal heating
Inventor: HAN MUN HUI
IPC: C23C14/48
Filed: 2000-03-18
Abstract: PURPOSE: A manufacturing method is provided to improve abrasion resistance of the surface by colliding ions having a higher energy onto an existing product in a high speed, thereby infiltrating ions into the surface of the product in a depth of about thousands Å, and enable alleviation of heat impact and economical production due to temperature increase generated during the abrasion resistance improved surface treating process. CONSTITUTION: The ion implantation equipment comprises an ion generator, a particle accelerator, a vacuum chamber(3) and an ion implantation chamber(4), wherein overheating of products mounted to disc shaped product holders is prevented by mounting a product holder assembly(5) having 6 or more disc shaped product holders to the ion implantation chamber(4) so that the disc shaped product holders are revolved and rotated, wherein RF ion source(1) or DC ion source, an ion generator generating a maximum current of 1 mA or more, an ion beam having a diameter of 10 cm or more, and an ion beam current density of 20 μA/cm2 or more without heat impact are used in the ion implantation equipment, wherein vacuum of the ion generator, particle accelerator and vacuum chamber is not influenced when detaching the ion implantation completed product and mounting a new product by installing a gate valve(13) between the vacuum chamber and the ion implantation chamber, wherein a life cycle of the cemented carbide tool is increased to 1.5 times by infiltrating nitrogen ions accelerated to 50 to 100 keV into the surface of cemented carbide tools(6) for printing circuit boards, namely, microdrill and router in a density of 1 to 5x10¬17 ions/cm2, and wherein the outer axis has the disc shaped product holders revolved while the inner axis has the disc shaped product holders rotated by mounting a product holder assembly having a double axis driven by a DC motor.
Patent KR-20010090943-A (KR)
Title: device for decreasing frost of evaporation in refrigerator
Inventor: LEE SANG UK
IPC: F25D21/00
Filed: 2000-04-08
Abstract: PURPOSE: A frost formation reduction system is provided to achieve an improved heat exchange efficiency for evaporator and reduce power consumption by lengthening the defrost cycle. CONSTITUTION: A frost formation reduction system comprises a freezing compartment(110) and a refrigerating compartment(120) for storage of food stuff; an evaporator(140) installed in the rear of the freezing compartment; a cooling air circulation duct(130) interposed between the freezing compartment and the refrigerating compartment, and which guides the cooling air discharged from the freezing compartment and refrigerating compartment to the evaporator; a frost formation member(131) arranged inside of the cooling air circulation duct in such a manner that the cooling air passing through the cooling air circulation duct forms frost at the frost formation member; and a defrost member for removing the frost formed at the frost formation member.
Patent KR-20010103848-A (KR)
Inventor: KIM DAE JUNG
Filed: 2000-04-26
Abstract: 본 발명은 기지국과 연결된 원격무선송수신장치로서, 내부로부터 신호를 무선출력하기 위한 매체가 되는 송신안테나와, 상기 송신안테나를 통해 송출될 상기 출력신호의 전압레벨을 검출하기 위한 송신파워검출기를 포함하는 무선송신부와; 외부로부터 신호를 무선수신하기 위한 매체가 되는 수신안테나와, 상기 수신안테나를 통해 수신된 상기 수신신호의 전압레벨을 검출하기 위한 수신파워검출기를 포함하는 무선수신부와; 상기 송신안테나에서 상기 송신파워검출기를 통해 송신전압 정재파비를 검출한 후, 수신전압 정재파비를 위한 소오스신호로 이용해서 안테나 반향신호를 역커플링하여 상기 수신파워검출기로 수신전압 정재파비를 검출하는 제어부를 포함하는 이동통신시스템의 원격알에프장치에 관한 것으로서, 송신출력신호를 이용해서 수신전압정재파비를 검출하여 별도의 소오스회로가 불필요하기 때문에 경제적일 뿐만 아니라, 구조가 간단하며, 별도의 소오스회로로 인한 노이즈발생을 방지할 수 있는 장점을 가진다.  또한, 측정시간대에 구애되지 않고 송신/수신 전압정재파비를 검출할 수 있어, 관리하기에 편해서 사용자 편의성을 증대시킨다.
Patent KR-20010103285-A (KR)
Inventor: KIM BYEONG JO
Filed: 2000-05-09
Abstract: 서브 컨베이어로부터 공급되는 크래쉬 패드의 좌표 정보를 먼저 취득하고, 투입 로봇 시스템을 통하여 차체 내부로 공급한 후, 3차원적인 차체의 변위를 검출하여 크래쉬 패드를 차체에 정확하게 조립하기 위한 크래쉬 패드 투입 로봇 위치 보정 장치 및 그 방법을 제공할 목적으로, 
     크래쉬 패드 서브 컨베이어의 측방에서 크래쉬 패드를 취출하여 차체 내부에 투입 및 장착 작동을 이루는 투입 로봇과; 송신되는 위치 보정 신호에 따라 상기 투입 로봇의 위치를 제어하는 로봇 제어기와; 크래쉬 패드 서브 컨베이어 상의 일측에서 크래쉬 패드의 도착과 동시에, 크래쉬 패드의 좌,우측부를 센싱하는 제1,2 카메라 수단과; 상기 제1,2 카메라 수단의 일측에 구성되어 상기 크래쉬 패드의 좌,우측부에 배광을 비추어주는 제1,2 배광용 조명과; 상기 투입 로봇의 그리퍼 선단 일측에서 차체 내부의 좌,우측 핀홀을 센싱하는 제3 카메라 수단과; 상기 제3 카메라 수단과 함께, 상기 투입 로봇의 그리퍼 선단 일측에서 차체 내부의 좌,우측 핀홀에 배광을 비추어주는 제3 배광용 조명과; 상기 제3 카메라 수단과 함께, 상기 투입 로봇의 그리퍼 선단의 다른 일측에서 차체의 프론트 도어 장착 패널면과의 거리를 센싱하는 초음파 센서와; 상기 제1,2,3 카메라 수단과 전기적으로 연결되어 비젼 보드를 통하여 화상 신호를 입력받아 이를 연산한 후, 이에 따른 위치 보정량을 시리얼 통신 보드를 통하여 로봇 제어기에 송신하는 PC부와; 상기 제1,2,3 배광용 조명과 전기적으로 연결되어 이를 온,오프 제어하기 위한 조명 제어신호를 출력하는 PLC를 포함하여 이루어지는 크래쉬 패드 투입 로봇 위치 보정 장치를 제공한다.
Patent KR-20010104522-A (KR)
Inventor: YOON SANG GWON
Filed: 2000-05-15
Abstract: 본 발명은 실시간 원격제어 방법에 관한 것으로 상세하게는 상호 원격 연결된 단말기간의 양방향 통신(양방향 제어)을 가능하게 할뿐만 아니라, 연결을 끊지 않은 상태에서 상호 제어권을 주고받을 수 있는 원격제어 엔진을 이용한 실시간 원격제어 방법에 관한 것이며, 보다 상세하게는 원격제어 엔진을 구성하는 메인 애플리케이션(main application) 및 각 서브 프로그램(sub program)들로부터 발생하는 데이터의 특성에 따라 각 데이터의 특성에 맞게 전송 전용 포트를 설정하는 멀티 패킷 프로토콜을 사용함으로써, 데이터 처리 속도의 향상 및 데이터 전송의 정확성을 기할 수 있는 데이터 처리 방법을 이용한 실시간 원격제어 방법에 관한 것이다.
Patent KR-20010107119-A (KR)
Inventor: JUNG MYEONG GUK
IPC: D04H1/559
Filed: 2000-05-25
Abstract: 본 발명은 저융점섬유와 고융점섬유가 혼합된 섬유, 또는 저융점 성분과 고융점 성분이 복합된 섬유를 개섬하여 웹으로 형성시키고, 형성된 웹을 적층한 후, 얻어진 웹적층물의 저융점섬유 또는 저융점 성분을 용융시키기 위하여 열처리하고, 가열압착하여 소망하는 두께의 견면을 제조하는 방법 및 장치에 관한 것으로서, 상기 용융열처리에 앞서 상기 웹적층물을 저융점 섬유 또는 저융점 성분의 융점 이하의 온도로 예열처리하는 것을 특징으로 하며, 이에 의하면 두께가 얇으면서 고밀도이고 균일한 품질을 갖는 견면을 용이하게 제조할 수 있게 된다.
Patent KR-20010007144-A (KR)
Inventor: KAMIYA YASUNORI
IPC: G03F7/038
Filed: 2000-05-30
Abstract: PURPOSE: To enhance resolution by incorporating an alkali-soluble resin, a crosslinking agent, a specified N-substituted succinimide compound and an acid generating agent other than the succinimide compound. CONSTITUTION: The chemical amplification negative type resist composition contains an alkali-soluble resin, a crosslinking agent, an N-substituted succinimide compound of the formula and an acid generating agent other than the succinimide compound. In the formula, R is optionally substituted alkyl, the residue of an alicyclic hydrocarbon, aryl or camphor. It is supposed that the N-substituted succinimide compound promotes the solubility of the unexposed part of the resist composition, increases contrast and enhances resolution because the compound is hydrolyzed with an alkali developing solution by a prescribed scheme and changes from the water-insoluble state to a water-soluble state.
Patent KR-20000058503-A (KR)
Inventor: KIM SE KWEON
IPC: G06F17/00
Filed: 2000-06-05
Abstract: PURPOSE: A system for publishing an electronic book using a wireless internet and a portable terminal is provided for receiving and reading an electronic book stored in a database of a remote server by connecting a mobile communication terminal and a wireless internet. CONSTITUTION: A wireless internet is connected between a user terminal(10) and a gateway. A wireless portal site information stored in a gateway proxy server is transmitted to a user terminal, so that the user can select a certain site. If the user selects, for example, infoever.com and requests a request information including a URL(Uniform Resource Locator) to the gateway(40). The gateway parses the user's request(grammatical check) and transfers to the remote server(30). The remote server(30) transfers a user's web page to the gateway(40). For example. an electronic book page formed of WML is transferred to the gateway(40), and the gateway(40) transfers to the user terminal.
Patent KR-20010111786-A (KR)
Inventor: PARK MIN DO
Filed: 2000-06-13
Abstract: 본 발명은 기업내 인트라넷(IntraNet) 또는 사내 그룹웨어와 사외(국내 또는 해외) 그룹웨어망, 기업 대 기업 엑스트라넷(ExtraNet)을 구축하여 하나의 거대한 망을 이루도록 하는 시스템을 제공한다. 
     또, 각각의 부서를 그룹화하고 암호화된 디지탈 서명 발급, 디지탈 서명에 의한 실시간 전자결재, 그룹(부서/팀)관리, 인력/재무관리, 프로젝트 진행과정, 기업내 전체 프로젝트 관리, 업무대비 개인능력평가, 업무분배, 개인능력치에 따른 인사고과, 차후의 유사 프로젝트 수행시 예상되는 소요시간 예측 및 최선의 모델을 제시해 주는 시스템을 제공한다. 
     또한, 그룹내 개인관리, 개인일정관리 등도 행하고, 이들 모든 내용 및 작업을 무선 인터넷으로 서버(Wireless Application Protocol)에 접근하여 읽기, 수정, 삭제 등의 작업을 행할 수 있으며, 각 작업 및 일정 등을 각각의 부서내 부서원들에게 통보해 주는 미리 알림기능을 행하는 SMS 서버도 포함하고 있다.
Patent KR-20020001406-A (KR)
Title: Dialing method of an switching system
Inventor: JUNG YONG BAE
IPC: H04M3/48
Filed: 2000-06-28
Abstract: PURPOSE: A dialing method of a switching system is provided to enable a call communication without a help of an operation by dialing a phone number of a caller according to a request from a callee after a call communication is normally made between them by using an intelligent network application protocol provided by a next generation intelligent network for general PSDN subscribers. CONSTITUTION: A call communication and termination is made between subscribers for an intelligent network service by a switching service of a service performing exchange(2). When the service performing exchange requests a service control point to store phone number information of a caller according to the normal destination call, the service control point receives the phone number information of the caller from the service performing exchange and stores it(4). A subscriber registered for an intelligent network service of a callee attempts an intelligence call through the service performing exchange by using a next generation intelligence service key(6). A call control function mounted at the service performing exchange detects the intelligence call and generates a trigger detection point to an intelligent control block(8). The service performing exchange forwards the intelligent network service processing request to the service control point(10). The service control point requests an announcement transmission for a subscriber profile verification and information collection from the intelligent peripheral device(12). The service performing exchange provides the announcement provided from the intelligent peripheral device to the subscriber who has attempted the intelligent network call in order to collect subscriber information and transmits it to the service control point(14). The service control point verifies the received subscriber information and transmits previously stored destination and origination phone number information to the service performing exchange(16). The service performing exchange connects the call by using the received destination and origination phone number information(18). The service performing exchange receives the announcement that the call is being connected from the intelligent peripheral device and transmits it to the subscriber who has attempted the intelligent network call(20). A speech path is formed between the two subscribers for a normal call communication(22).
Patent KR-20010029867-A (KR)
Title: Opto sensor signal detector
Inventor: GEORGE JOHN BARRET
IPC: H04N17/04
Filed: 2000-06-29
Abstract: PURPOSE: An optical sensor signal detector to precisely detect a sensor output signal level, thus preventing measurement mismatching caused by wide variation in illumination level. CONSTITUTION: The output of a sensor detector(275) is equal to a pulse signal(202) of forward direction which is supplied to the input of a digital convergence IC STV. The leading edge of the signal(202) is sampled, both the vertical and horizontal counters are stopped, and accordingly the count value decides a specific part in a measurement matrix where an illuminated sensor exists. The sensor current is measured by means of a reference current Iref, that increases controllably until the detector(275) is switched to show the stop of sensor illumination. The value of reference current that is shown by the detector(275) shows a level of illumination that is incident on the sensor.
Patent KR-20020004357-A (KR)
Title: A joining tool of cross type for architecture scaffold
Inventor: BYUN GI HYUNG
IPC: E04G1/36
Filed: 2000-07-05
Abstract: PURPOSE: A cross knuckle is provided to continuously maintain the solidity of a dome typed building by crossing and connecting a support and a reinforcing strut. CONSTITUTION: A support(2) is supported in a supporting member(10). Many brackets(11) are formed in the supporting member(10) in a cross shape. Reinforcing struts(4) are connected and fixed in the brackets(11). Many bolting holes(12) are punched in the supporting member(10) and the brackets(11). The supports(2) and the reinforced struts(4) are fixed by applying to bolts(15). U-shaped openings are formed in the brackets(11) lengthwise. The supports and the reinforcing struts are firmly connected and fixed in the supporting member and the brackets as cross shapes.
Patent KR-20020004566-A (KR)
Title: Electronic coupon service method and apparatus therefor
Inventor: JUNG HYUCK JEEN
Filed: 2000-07-06
Abstract: PURPOSE: An electronic coupon service method is provided to enable a client to be supplied with a coupon directly when applying the coupon via a personal digital assistant without connection with a time and a space. CONSTITUTION: An electronic coupon service method provides a coupon service related to a desired shop using a coupon service server(130), which issues and manages a coupon. The electronic coupon service method comprises endowing a member code after receiving an application of coupon issuing from each shop, inputting a telephone number after receiving a shop code and a coupon type of a shop whose coupon is required by a client, transferring the coupon to a portable telephone(101) of the telephone number, and transferring a message for confirming coupon issuing to a terminal connected with the coupon service server(130).
Patent KR-20020007076-A (KR)
Title: Saccharomyces sp. CBI-700 and producing method of tyrosinase production inhibitor using the strain
Inventor: JUNG HO GWON
IPC: C12N1/16
Filed: 2000-07-15
Abstract: PURPOSE: A novel strain, Saccharomyces sp. CBI-700, and a method for producing tyrosinase-producing inhibitor using the same are provided, which microorganism can mass-produce the stable tyrosinase-producing inhibitor wherein tyrosinase is associated with the melanin production. CONSTITUTION: The anaerobic microorganism, Saccharomyces sp. CBI-700 (KFCC-11178) is capable of producing the tyrosinase-producing inhibitor. The tyrosinase-producing inhibitor is produced by cultivating Saccharomyces sp. CBI-700 (KFCC-11178) in a medium at 30 deg.C with agitation; centrifuging the cultured medium to recover the grown cells; adding the cells into 3 to 10% of ethanol, saline or their mixture at the concentration of 30% or less to result in autolysis of the cells, in which the obtained tyrosinase-producing inhibitor may be further treated by passing through the anionic exchange resin pre-activated by 0.1M phosphate buffer of pH 7.0 and isolating with 1M saline.
Patent KR-20020009233-A (KR)
Title: Tray loading and conveying device for automatic transplanter
Inventor: CHOI DEOK GYU
IPC: A01C7/08
Filed: 2000-07-25
Abstract: PURPOSE: An apparatus for loading and transferring a tray for growing a seedling for an automatic planting machine is provided to reduce the labor and the time of working by automatically transferring the tray in all direction. CONSTITUTION: The apparatus for loading and transferring a tray for growing seedling for an automatic planting machine comprises a loading body(10) composed of a transverse frame(11), a side frame(16) coupled with a transfer screw(17) and a transfer shaft(18), and a support frame(19); a transfer guider formed with a spiral slide groove along the inner surface thereof; a driving gear part; a ratchet 	 driving part(60); and a vertical transfer gear part(80) composed of a transmission gear coupled with a rotating shaft, and a longitudinal driving gear(82) coupled with a transmission sprocket(13). The driving gear part is composed of a first, a second, and a third driving gears(45), a horizontal transfer driving gear(40) and a vertical transfer gear, and a semi-circular shaped driving wheel(52) engaged with a driven wheel. The ratchet driving part consists of a ratchet gear(62), a counter-turn ratchet gear, a tension spring, a rod connected with the ratchet gear through a link, and a counter-turn latchet connected with a coil spring, a slider, and a link.
Patent KR-20020012940-A (KR)
Title: A continuous oxygen concentrator with 3 tower-2 compressor and the method thereof
Inventor: LEE TAE SU
IPC: C01B13/02
Filed: 2000-08-09
Abstract: PURPOSE: A continuous oxygen concentrator of three tower-two compressor type is provided, which can achieve an excellent performance that equivalent to the two streams of two tower-one compressor, so that this system can be substituted for the two stream system of two tower-one compressor thus saving one adsorbing tower. This system can shorten the producing period and increase hourly productivity. CONSTITUTION: The system comprises two compressors of No.1 and No.2(100,110), an air flow control valve(300), three adsorbers(200,210,220), an equalizing valve(400), a storage tank(500), a pressure controller(510) and a flow meter(520). Air compressed by compressors(100,110) is fed sequentially to one of three adsorbers(200,210,220) to have oxygen concentrated, the flow being controlled by air flow control valve(300) that controls air to flow sequentially to adsorbers. The oxygen-rich stream is fed to storage tank(500) after equalized by the equalizing valve(400), the adsorbers being sequentially back washed by concentrated oxygen.
Patent KR-20020012965-A (KR)
Title: Manufacturing method of generator rotor coil vent hole
Inventor: CHOI GYU WON
IPC: H02K15/04
Filed: 2000-08-10
Abstract: PURPOSE: A method for fabricating a hole for cooling a generator rotor coil is provided, which can improve a quality and can reduce a working time. CONSTITUTION: A rotor coil strand(26) is installed through a guide(22) of an automatic transport apparatus(10) and a punch metallic form(16) of a punch press(14). And if a program is selected from a control panel(24), a grip(18) of an input/output side automatic transport apparatus(10,12) is moved as long as a length given by the program, and is exhausted through the guide of the output side automatic transport apparatus as repeating automatic hitting of a cooling hole with the punch metallic form lined to the input/output side automatic transport apparatus. Also, the grip minimizes an error while transporting the strands by installing an air pressure cylinder in a support and installing an LM guide in the support.
Patent KR-20010067095-A (KR)
Inventor: FUJIOKA YUICHI
IPC: F01N3/08
Filed: 2000-08-23
Abstract: PURPOSE: To provide a device and a method for collecting and eliminating particulates in exhaust gas from an internal combustion engine such as a diesel engine for a ship, for traveling on the ground, and for fixing on the ground. CONSTITUTION: The device for eliminating the particulates in exhaust gas 10 in a diesel engine is composed of a disk filter 11 as means for collecting particulates, and spray 13 having a plurality of nozzles (a spray type, a shower type, and the like) 13a as catalyst sticking means for sticking alkali metallic catalyst solution 12 on a surface of the particulates collected by the disk filter 11, the catalyst is stuck on the collected particulates, and then unburned particulates are combustion-decomposed.
Patent KR-20020016269-A (KR)
Title: Device for combine anode cap terminal of fbt
Inventor: RYU HO YEONG
IPC: H01F38/42
Filed: 2000-08-25
Abstract: PURPOSE: An anode cap termination coupling apparatus of a fly back transformer is provided to fixedly couple the anode termination into a coupling groove in a cathode ray tube by fixing the anode termination by simply pushing an arc spring coupling piece of the anode termination. CONSTITUTION: An anode cable from a fly back transformer supplies a high voltage to a cathode ray tube. An arc anode cap(120) is mounted at one end of the anode cable termination(110) for avoiding high voltage leakage. Inside the anode cap(120), an anode termination(140) including a cable coupling groove(130) is formed for coupling the one end of the anode cable termination(110). The anode termination(140) is inserted into a termination coupling groove of the cathode ray tube. Arc spring coupling pieces having hooking jaws(170) are elastically arranged at the both ends of the anode termination(140). The hooking jaws(170) of the arc spring coupling pieces are inserted into the coupling groove at the cathode ray tube.