baber/WOPTO huggingface dataset:
Patent KR-900002584-B1 (KR)
Title: Recording disk and a method for fabrication same
Inventor: ITTO NAKAMOKOTO
IPC: G11B7/24
Filed: 1985-05-22
Granted: 1990-04-20
Abstract: The recording disc comprises a substrate having a tracking servo groove of spiral or concentric pattern on one surface.  The servo groove has a constant depth and a variable width which varies to allow generation of a position indicating signal.  An erasable recording layer is deposited on the surface of the substrate to store information signals.  The recording disc is fabricated by a method involving modulating the intensity of a laser beam with a permanently stored signal and directing it to the surface of a photoresist layer on a master blank placed on a rotating turntable.
Patent KR-920007557-B1 (KR)
Inventor: CORKS DAVID
IPC: C07D235/00
Filed: 1985-07-06
Granted: 1992-09-07
Abstract: 내용 없음.
Patent KR-880001576-B1 (KR)
Title: Automatic power breaking selecting circuit
Inventor: LEE CHAE-MIN
IPC: H01H43/00
Filed: 1985-07-08
Granted: 1988-08-23
Abstract: The circuit is for setting an automatic powder-off time of a calculator to cut off power automatically when not in use or after use.  The power is cut off by an OR gate output signal which is a logic combination of a number of block (BS) and flip-flops (F50-F70).  Each block includes a memory register (MR) for storing selected data, and a flip-flop (F73) operated by logic combination of power- off signals (q4-q6).
Patent KR-890000178-B1 (KR)
Title: Process for the preparation of n-aryl-alpha-hydroxyamide
Inventor: KIM YONG-HAE
IPC: C07C231/02
Filed: 1985-07-25
Granted: 1989-03-09
Abstract: The title compds. of formula RC(OH)CONHAr are prepd. by reacting N- sulfinylamine of formula Ar-N=S=O with RC(OH)COOH in an org. solvent i.e. acetonitrile, benzene, THF., where Ar=Ph, pchlorophenyl, R=H, - COOH, -HCOH, Ph.  Thus, dissolve 2-hydroxybutanoic acid (230mg) in acetonitrile (10ml), add N-sulfinylaniline (280mg) and stir for 6hr at room temp., eliminate solvent and recrystg. in water/EtOH to give N-phenyl-2-hydroxy butanamide 340mg (96%).
Patent KR-870001539-B1 (KR)
Title: Preparing process for 4-methyl-5 thio amino-dimethyl imidazole dihydrochloro
Inventor: HORIUTZI CHIVO
IPC: C07D233/54
Filed: 1985-09-20
Granted: 1987-09-02
Abstract: The title compd. (I) is prepd. by the reaction of thiourea and 4- methyl-5-chloromethylimidazole. Thus, 33.4g 4-(chloromethyl) -5- methylimidazole-HCL stirred with 15.24g thiourea in EtOH for 3hr to give 43.84g 4-methyl-5-thioformamidinomethyl imidazoldihydrochloride (yield 90%).
Patent KR-890000181-B1 (KR)
Title: Tooth paste composition
Inventor: AN HO-JEONG
IPC: A61K8/24
Filed: 1985-10-22
Granted: 1989-03-09
Abstract: Compsn. for prepg. tooth paste comprises (A) SMFP 0.5-1 wt.% (660- 1320 ppm) and NaF 0.07-0.14 wt.% (316-632 ppm) to make fluoride ratio of SMFP to NaF to about 2:1, (B) calcium glycerophosphate 0.05-0.5 wt.% to make mole ratio of F to Caglycerophosphate to 12:1 and (C) synthetic silica 20-30 wt.% composed of silica gel 10-50 wt.% and pptd. silica 50-90 wt.%.
Patent KR-950006231-B1 (KR)
Inventor: HYLAND WILLIAM J
IPC: H01G9/00
Filed: 1985-11-07
Granted: 1995-06-12
Abstract: 내용 없음.
Patent KR-900000237-B1 (KR)
Title: Sheet like structure and process for producing the same
Inventor: AKAKI TAKAO
IPC: D06N3/04
Filed: 1986-02-04
Granted: 1990-01-24
Abstract: A sheet-like structure exhibiting excellent resistance to disperse dye migration and sublimation, comprising a fibrous structure contg. 10wt.% or more of disperse dye-polyester fiber and having, on side (s) thereof, a resin layer (I) with a thin film of polymer (II) or a Si-contg. compd. formed on side (s) of (I). (I) is a 100-10,000 A thick layer of polyurethane, acrylic polymers, vinyl chloride polymers and synthetic rubbers ; and II is a derivative of a F-compd. and has a deg. of fluorination of 0.2-1.8, defined as the quotient of the division of the Fls peaks area as measured by XPS by the C15 peak area.
Patent KR-960002038-B1 (KR)
Inventor: NAGAKI TAKEHIRO
IPC: G11B5/86
Filed: 1986-06-26
Granted: 1996-02-09
Abstract: 내용 없음.
Patent KR-880000111-B1 (KR)
Title: Process for the preparation of 6.6'-dihydroxy-3,3,3',3'-tetramethyl-1,1-spirobiindan
Inventor: TANABE YOSHIMITSU
IPC: C07C37/11
Filed: 1986-06-28
Granted: 1988-03-12
Abstract: The title compd. having for mula(I) is prepd. by heattreating (50-200 deg.C) 2,2'-bis (4-hydroxyphenyl) propane in the presence of superacid type resin or perfluoroalkane sulfonic acid [CnH2n+1SO3H, n=1-8 integer .  Heat 2,2'-bis (4-hydroxyphenyl) propane 25g and trifluoromethane sulfonic acid 1g for 5hrs at 140-150 deg.C, distg. inphenol as byproduct, cool and dissolve the rxn. mixt. in isopropanol 15mL, add 9% NaOH aq. soln. to form Na salt and filter, heat-treating at 80-83 deg.C with 25% isopropanol aq. soln. 300 mg for 30 mins, neutralize with HCl (dissolved in 15% isopropanol) and filter to give 81.5g of white-crystalline (I).
Patent KR-890001857-B1 (KR)
Title: Automatic sewing device by incitement board
Inventor: LEE IN-HEUI
IPC: D05B21/00
Filed: 1986-08-07
Granted: 1989-05-27
Abstract: A gear-box (28) and an electromagnet (25) are fixed to the low-part of a sewing machine (1).  When the power of the electromagnet (25) is on-off, a controlling device (26) is induced to rotate a bevel gear (27) inversely or not.  Pins (4) are fixedly arranged in the form of a sewing work on guide plate (2), and workpiece (34) moves following the guide plate (2).
Patent KR-900003536-B1 (KR)
Title: Method and device for making a chimney stack
Inventor: KIM CHUNG-IL
IPC: E04G11/00
Filed: 1986-09-08
Granted: 1990-05-21
Abstract: The method and device for building a chimney stack contains elevating inner and outer worktables assembled on the ground by handle operation of a lever block, and repetition of assembling, dismantling concrete form, and concrete mortal deposition. The device includes inner worktable (1) with centeral tower structure (T), outer worktable (2). The inner worktable is formed of elevating device (E1) connected to lower worktable (3), middle worktable (4), upper worktable (5). The outer worktable is formed of roller (6) attached to lower pedal (7), middle pedal (8), upper pedal (9), connectiing angle (10), guardrail (11), and elevating device (E2).
Patent KR-910001276-B1 (KR)
Inventor: KOMAZ GEIGI
IPC: H04N9/82
Filed: 1987-01-09
Granted: 1991-02-26
Abstract: 내용 없음.
Patent KR-900005251-B1 (KR)
Title: Method of predicting remining lifetime of metal material
Inventor: KOYAMA DERUO
IPC: G01N15/02
Filed: 1987-10-15
Granted: 1990-07-21
Abstract: The shapes of grains of a metal material are quantitatively measured, and the remaining lifetime of the material predicted on the basis of variations. The variations in said shapes are represented by a standard deviation of the distribution of angles which the direction of stress makes with the direction of the longitudinal axis of the maximum diameter of each of the grains. Alternatively, variations in the shapes are represented by a ratio of the maximum length of the longitudinal axis of each of the grains to the maximum width of an axis of each of the grains perpendicular to the longitudinal axis.
Patent KR-900008154-B1 (KR)
Title: Field effect transistor
Inventor: SASAKI GORO
IPC: H01L21/205
Filed: 1987-10-23
Granted: 1990-11-03
Abstract: The FET on an InP substrate comprises an n-type layer on the substrate on which is formed an undoped GaInAs layer and an AlInAs layer. A control electrode is provided on the AlInAs layer and source and drain ohmic electrodes are provided on either side of the gate. The n-type layer may be AlInAs or InP, and the top AlInAs layer may be n-type or p-type. Pref. the GaInAs layer has a thickness of 150- 1000 Angstroms, and the n-type layer includes impurities having the concentration of between 10 to the power 17 and 5x10 to the power 18 per cc and has a thickness of 500-2000 Angstroms.
Patent KR-950014991-B1 (KR)
Inventor: GARRY GODEN REZRI FIMERI
IPC: B66F3/44
Filed: 1987-12-12
Granted: 1995-12-21
Abstract: 내용 없음.
Patent KR-910002830-B1 (KR)
Inventor: NISHIKUCHI KATSNORI
IPC: H01L21/00
Filed: 1988-03-12
Granted: 1991-05-06
Abstract: 내용 없음.
Patent KR-910008532-B1 (KR)
Inventor: ISI KAZHIRO
IPC: H01H33/59
Filed: 1988-03-23
Granted: 1991-10-18
Abstract: 내용 없음.
Patent KR-910004110-B1 (KR)
Title: Dew senser and its manufacturing method
Inventor: CHON SEUNG-HAK
IPC: G01N27/02
Filed: 1988-04-13
Granted: 1991-06-22
Abstract: The dew  sensor  with  resistance  capacity  consists  of:  a substrate having alumina ceramic above 90%; conductive material of carbon group; counter electrode formed by  patterning;  the  resin with hygroscopic property which  contains  the  carbon  15-30%  to total weight and cellulose  55-75%  and  poly-vinylalcohol   1-5%, and an inorganic substance 10-20%.
Patent KR-970004820-B1 (KR)
Inventor: MEARS ERIC L
IPC: H01J37/317
Filed: 1988-05-04
Granted: 1997-04-04
Abstract: 내용 없음.
Patent KR-920009704-B1 (KR)
Inventor: HIROSUMI YASUO
IPC: H01K1/46
Filed: 1988-07-06
Granted: 1992-10-22
Abstract: 내용 없음.
Patent KR-930011764-B1 (KR)
Title: Vacuum system and method of plasma enhansed silicon oxide deposition
Inventor: LOPATA EUGENE S
IPC: C23C16/40
Filed: 1988-07-14
Granted: 1993-12-20
Abstract: A method of depositing a hard silicon oxide based film is provided by controllably flowing a gas stream including an organosilicon compound into a plasma and depositing a silicon oxide onto a substrate while maintaining a pressure of less than about 100 microns during the depositing. The organosilicon compound is preferably combined with oxygen and helium and at least a portion of the plasma is preferably magnetically confined adjacent to a substrate during the depositing, most preferably by an unbalanced magnetron. These silicon oxide based films may be reproducibly deposited on small or large substrates, such as glass, plastic, mineral or metal, with preselected properties.
Patent KR-910007385-B1 (KR)
Inventor: GIGUCHI HIROUGGI
IPC: C04B35/653
Filed: 1988-09-15
Granted: 1991-09-25
Abstract: 내용 없음.
Patent KR-920005056-B1 (KR)
Inventor: NUMAKURA TAKASHI
IPC: G03G13/00
Filed: 1988-10-04
Granted: 1992-06-26
Abstract: 내용 없음.
Patent KR-940005909-B1 (KR)
Inventor: TSUKAMOTO TATSUSABU
IPC: B42F1/08
Filed: 1987-01-16
Granted: 1994-06-24
Abstract: 내용 없음.
Patent KR-910007299-B1 (KR)
Title: Uranium silicide dispersion fuel utilizing rapid solidification by atomazation
Inventor: KUK IL-HYUN
IPC: B22F9/10
Filed: 1989-05-11
Granted: 1991-09-24
Abstract: The equipment manufactures uranium silicide  powder,  nuclear fuel for a  multi-purpose  research  atomic  reactor,  by  rapidly cooling  uranium/silicon  alloy  melt  without   a   pulverization process. The equipment comprises a high frequency current heating type furnace (1) connected to a vacuum pump, an alloy melting tank having a melting chamber (2) and a cooling chamber (3),  an  inert gas tank (4) connected to the melting/cooling chambers, a  cooling gas tank connected to the cooling chamber, a differential pressure requlator (4a) installed on the inert gas pipe fittings,  a  valve (5a) for supplying the cooling  gas  to  the  chamber  (3)  and  a graphite base plate covered with ceramics.
Patent KR-0136103-B1 (KR)
Title: Stabilized composition comprising 3-isothiazolones and using method thereof
Inventor: JOHN ROBERT MATTOX
IPC: A01N25/22
Filed: 1989-05-16
Granted: 1998-04-25
Abstract: Epoxides used to stabilize isothiazolone or isothiazolone compositions which are normally unstable, neat or in solution. These compositions exhibit bactericidal, fungicidal and algaecidal properties.
Patent KR-920004607-B1 (KR)
Inventor: UEDA EIZI
IPC: C08L71/12
Filed: 1989-06-21
Granted: 1992-06-11
Abstract: 내용 없음.
Patent KR-970010517-B1 (KR)
Title: Recording and reproducing apparatus and method using dat memory function
Inventor: OH YONG-KYU
IPC: G11B27/032
Filed: 1989-07-31
Granted: 1997-06-26
Abstract: Memory part(10) memorizes the signal inputted to digital/analog converter(7) from digital signal processing part(6). System control part(4) impresses the signal inputted to digital/analog converter(7) with the control of system control part(4) to memorize, and it reads the signal memorized in that memory part(10) to impress to digital signal processing part(6).
Patent KR-920008824-B1 (KR)
Inventor: PRESS JEFFERY B
IPC: A61K31/40
Filed: 1989-09-21
Granted: 1992-10-09
Abstract: 내용 없음.
Patent KR-0157968-B1 (KR)
Inventor: YAMAMURA AKIRA
IPC: F16C32/04
Filed: 1989-11-07
Granted: 1999-05-01
Abstract: 내용 없음.
Patent KR-920005651-B1 (KR)
Title: Preparation method of alumina-zirconia composite
Inventor: LEE KI-GANG
IPC: C01G25/00
Filed: 1989-12-30
Granted: 1992-07-11
Abstract: An alumina-zirconia composite is produced by  (1)  dispersing alumina having more than 95 % of purity and less than  100   m  of size, into water solvent at less than  pH  6,  (2)  titrating  the alumina to nirconium soln., (3) coating zirconia precursor  around alumina particle by surface induced coating  process  which  makes alumina- zirconia precursor  coated  selectively  by  heterogeneous nucleation, (4) drying and calcining  the  composite  powder,  (5) molding  the  powder  by  press  or  hydrostatic  press,  and  (6) sintering it at the temperature  range  of  1,200  deg.C  -  1,800 deg.C.
Patent KR-930001450-B1 (KR)
Title: Module-group controller
Inventor: PARK SUNG-HYON
IPC: H04Q11/04
Filed: 1990-05-11
Granted: 1993-02-27
Abstract: The time sharing controller for comparing between  the  input and output data in time slot unit to perform  the  maintenance  of TRX-10 to improve the  system  efficiency,  comprises  comparators (CMPG01) for receiving clock signals and a module group ID  signal to output one bit of receiving module ID data, receivers (REG) for using the comparator output as an enable  signal  to  receiver  an input PCM data of eight unit modules, a control data  and  the  ID data, transcivers (TRX) for forming a number of module groups as a link, comparators (CMPG00) for receiving several ID data to output a transmission module ID data, and drivers (DRG) for  transmitting the unit module ID, input PCM, transmission  module  data  to  the unit module. The controller controls 4096 time slots per a  module group.
Patent KR-100213462-B1 (KR)
Title: Device and process for controlling the focusing of a monopolar charged particle beam
Inventor: WEGMANN URS
IPC: H01J37/21
Filed: 1990-05-23
Granted: 1999-08-02
Abstract: A process and a system are disclosed for controlling the focusing of a beam of monopolar charged particles which is used, for example, to vaporize substances in vacuum coating systems. The beam (S) has a cross-sectional area (Q) in a plane (E1) transverse to the axis of the beam. Perpendicular to plane (E1) there is a plane (E2), the surface normal (R) to which indicates the direction in which the change in the cross-sectional area (Q) is to occur. According to the invention, flux density fields (B1, B2) are applied, which are parallel on opposite sides to plane (E2) but have opposing directions. As a result, the change in the focusing of the beam has essentially no effect on any deflection of the beam; that is, it is possible to control the focusing without exerting any significant effect on the deflection.
Patent KR-930002654-B1 (KR)
Inventor: NAIKI KATSUAKI
IPC: H01J29/48
Filed: 1990-05-31
Granted: 1993-04-07
Abstract: 내용 없음.
Patent KR-920008331-B1 (KR)
Title: Locking device of brake pedal that use clutch pedal
Inventor: JANG HYOK-SUN
Filed: 1990-07-16
Granted: 1992-09-26
Abstract: The locking appartus controlling a brake pedal  is  installed between the clutch pedal and the brake pedal. A curved rocker  arm (2) connected with clutch pedal (1) is inserted  in  the  hole  of dash panel (3). A spring (7) is placed into a  hole  (6a)  in  the center of a shaft (6) with rollers  (4),(5)  and  a  catcher  (8). After fixing a support (11) at the shaft (S) with  spring  (10)  a rocker arm (2) is located between rollers  (4),(5),  and  a  latch (13) is attached with bolts (14).
Patent KR-930000672-B1 (KR)
Title: Holding circuit of vertical sychronizing signal
Inventor: KIM YONG-HUI
IPC: G06F3/14
Filed: 1990-07-21
Granted: 1993-01-29
Abstract: The circuit generates  mode  control  signal  with  a  simple composition of circuit even when vertical sync. of wide  bandwidth is inputted, by comparing  the  voltage  level  derived  from  the frequency of  the  input  vertical  sync.  signal  with  reference voltage. The circuit includes a polarity converting  section  (50) for converting the vertical sync. signal input to  the  signal  of positive polarity, an amplifier (60) for amplifying the output  of the polarity converting section (50), and a mode signal  generator (70).
Patent KR-920009929-B1 (KR)
Title: Air exhaust method for vulcanizing machine for tire and tire forming drum
Inventor: SONG YONG-ON
IPC: B29C35/02
Filed: 1990-10-15
Granted: 1992-11-06
Abstract: The method  for  discharging  air  when  the  green  tyre  is vulcanized, comprises: preparing a green tyre (4) manufactured  by a drum (1) which is formed with a plurality of projections (12) on the sides of the drum (1); forming  concave-grooves  (14)  on  the inner side of the green tyre (4); mounting the green tyre  (4)  to the vulcanizing mould (16); and then pressing the green  tyre  (4) with the bladder (15).
Patent KR-100188368-B1 (KR)
Title: An insulation displacement contact
Inventor: MITRA NIRANJAN K
IPC: H01R12/67
Filed: 1990-11-06
Granted: 1999-06-01
Abstract: An insulation displacement contact for insulation displacement contacting of an insulated electrical conductor disposed in a cable. Each contact comprises two flat sheet parts abutting against each other, obtained by folding over a flat blank of metal and provided with projecting tongues bounding an aperture for receiving the cable and displacing the insulation thereof. The ends of the tongues lying away from the aperture are folded over essentially at right angles to the plane of the flat sheet parts, in order to form an H-shape.
Patent KR-0166818-B1 (KR)
Inventor: KIM BYUNG-SUB
IPC: H01L21/76
Filed: 1990-12-21
Granted: 1999-02-01
Abstract: 본 발명은 반도체 소자중 모오스 소자의 제조방법에 관한 것으로 기판위에 산화막, 제1질화막을 형성하고 P/R을 사용하여 활성화 영역 정렬과 노광을 실시하는 공정과, 리엑티브 이온 식각 방법으로 상기 제1질화막, 산화막, 기판을 식각하는 공정과, 채널 스톱을 위한 이온 주입 후, 산화막 제2질화막, P/R을 형성하는 공정과, 리엑티브 이온 식각 방법으로 P/R과 제2질화막을 식각하고 잔존 P/R을 제거하는 공정과, 필드 산화막을 형성하고 질화막을 모두 제거한 후 CVD 산화막과 폴리머 막을 형성하는 공정과, 리엑티브, 이온 식각에 의하여 상기 폴리머 막과 CVD 산화막을 식각하는 공정을 차례로 실시하여서 이루어진다.
Patent KR-0140986-B1 (KR)
Inventor: NUBSON RICHARD C
IPC: B65H5/00
Filed: 1989-09-13
Granted: 1998-07-01
Abstract: 내용없음.
Patent KR-0158665-B1 (KR)
Title: Extended composite tv system
Inventor: FUHREM MARCEL
IPC: H04N7/08
Filed: 1990-03-26
Granted: 1998-12-15
Abstract: Cross-luminance and cross-color artifacts can be eliminated if in an extended encoder the chrominance information is made pairwise equal at two time instants and the luminance information (i.e. the high horizontal frequencies) is also made equal at these two time instants. In an extended decoder, the high-frequency luminance information can be separated again from the modulated chrominance information by, for example, (i) subtracting the information of the pairs at the above-mentioned time instants and by dividing them by 2 (this yields chrominance), and by (ii) averaging the information of the pairs at these time instants (this yields high-frequency luminance).
Patent KR-0174559-B1 (KR)
Inventor: MUTAGUCHI YASUHIKO
IPC: B32B7/02
Filed: 1991-02-02
Granted: 1999-03-20
Abstract: 본발명은, 무배향 황화폴리페닐렌 필름과 무배향 황화폴리페닐렌 필름의 적어도 한쪽 표면 위에 접합되는 2축배향 황화폴리페닐렌 필름으로 구성되는 적층체, 및 그 적층체의 제조방법을 개시하고 있다. 
     무배향 황화폴리페닐렌 필름의 결정화를 억제하는 것에 의하여 적층체의 박리가 방지될 수 있고 인열강도가 증가될 수 있다. 
     접착재가 개재되지 않으며 적층체층의 주요성분이 황화폴리페닐렌이므로, 적층체는 우수한 내열성, 내약품성, 전기절연성, 내습열성 및 적당한 가공성을 보유할 수 있다.
Patent KR-100191188-B1 (KR)
Title: Device for injecting preheated air into a shaft furnace
Inventor: MAILLIET PIERRE
IPC: C21B7/16
Filed: 1991-04-27
Granted: 1999-06-15
Abstract: The device comprises an oblique portion connected by a gooseneck, a nozzle, atuyere and a ball-and-socket joint to the wall of the furnace, in which the oblique portion comprises a tapered tube flange-mounted by its upper part onto an upper connection piece forming part of a bustle pipe and the lower part of which dips axially into a lower connection piece integral with the gooseneck, a bellows expansion joint and tension rods ensuring the mechanical connection between the tapered tube and the lower connection piece. The lower connection piece and the tapered tube can move mutually in the axial direction and have means for limiting their radial mobility.
Patent KR-940003826-B1 (KR)
Title: Drying control method for clothes-dryer
Inventor: SONG YONG-JU
IPC: D06F58/28
Filed: 1991-09-12
Granted: 1994-05-03
Abstract: The method is for controlling the laundry dry by measuring temperature of the cooling air with a sensor. The temperature of the cooling air is measured at a certain time later by the temperature sensor after turning on the heater and the motor of the drying machine. The measured temperature is divided by four zones. Different humidity for judging the dry completion and the time for extending the dry process are set for each zone. If the inner humidity is reached to the preset humidity, the dry process is run as much as the preset time and the dry process is stopped.
Patent KR-940007185-B1 (KR)
Title: Method of controlling heater of air conditioner in starting hot condition
Inventor: LEE MYONG-HUN
IPC: F24F11/00
Filed: 1991-10-31
Granted: 1994-08-08
Abstract: The hot start heating operating method comprises the steps of: checking whether a setting temperature is higher than a room temperature; if it is lower than the room temperature, turning off a fan and a compressor; if it is higher than the room temperature, turning on the compressor, and checking whether a thermal exchange temperature is above a constant temperature and whether a pressure switch is on state; if both are not satisfied, turning off the fan, and if either one is satisfied, driving the fan to a gentle air flow; and driving the fan to a setting air filw when a constant time elapses, thereby admitting a warm air during a heating operation start.
Patent KR-100196309-B1 (KR)
Title: Variable speed transmission device, particularly for motor vehicles
Inventor: ANTONOV ROUMEN ANTONOV
IPC: F16H37/02
Filed: 1991-02-27
Granted: 1999-06-15
Abstract: PCT No. PCT/FR91/00159 Sec. 371 Date Oct. 24, 1991 Sec. 102(e) Date Oct. 24, 1991 PCT Filed Feb. 27, 1991 PCT Pub. No. WO91/13275 PCT Pub. Date Sep. 5, 1991.A transmission (1) has an input (2) connected to an engine (3). At a speed above idling, a centrifugal clutch (9) connects the engine to a pump (8) of a torque converter (7) and also to a sun gear (14) of a planetary gear train (13). A turbine (11) of the torque converter is connected to a ring gear (16) of the planetary gear train, and a planet carrier (18) is connected to an output (4) of the transmission. A free wheel (22) mounted between the ring gear and a stationary housing prevents reverse rotation of the ring gear. At low engine speeds, the power passes via the sun and planet gears through the planet carrier to the output, while reaction torque exerted by the planet gears on the ring gear is greater than forward torque transmitted through the torque converter, so that the ring gear is held stationary by the free wheel. In this condition, the planetary gear train acts as a mechanical speed reducer. As the engine speed increases, the torque transmitted by the converter to the ring gear exceeds the reaction torque of the planet gears, driving the ring gear in the forward direction at progressively increasing speeds that approach the speed of the planet carrier, thus progressively decreasing the speed reduction of the gear train. The planetary gear train serves to add the engine power received directly at the sun gear and via the hydraulic torque converter at the ring gear.