baber/WOPTO huggingface dataset:
Patent DE-4441870-C1 (DE)
Title: Extractor for hip joints
Inventor: ZACH WOLFGANG
IPC: A61F2/36
Filed: 1994-11-24
Granted: 1996-03-28
Abstract: The extractor has a U-shaped grip (1) which is threaded by two adjusting screws (5) and with the free ends of the screws braced against the insides of thrust rings (6). Each pressure ring has a shaped recess to locate the bearing pivot (17) and a lip (3) which grips into a slot around the neck of the bearing. The screw fasteners are tightened to separate the ball joint (17) from its mounting. The ball joint mounting can be a simple conical joint (16) which is released through axial pressure on the ball joint w.r.t. the ball joint mounting. The U-shaped grip has thrust ring and a correspondingly shaped housing for the thrust ring. After fitting the extractor the thrust ring and housing are rotated at 180 deg. to each other to lock onto the joint mounting.
Patent DE-4446282-C1 (DE)
Title: Rolling motion limiter for railway coach bodies
Inventor: ROESLER JOERG DIPL ING
IPC: B61D3/10
Filed: 1994-12-23
Granted: 1996-04-04
Abstract: Two rocker bearings (5,6) are located in the upper area of the gantry, between two car bodies (1,2). A first bearing is located on a console (3) of the first body, a second bearing is located offset horizontally and sideward, relative to the first bearing, on a console (4) of the second body. The first bearing has a bearing block with a slide sleeve, located at right angles to the longitudinal axis of the body. A push rod moves in the sleeve, and one end of the rod is connected to the second rocker bearing. Spring elements with stops for the bearing block are located on the push rod on either side of the bearing block.
Patent NL-1007066-C1 (NL)
Title: Secondary lid for refuse bin - fastened inside hinged lid by adhesive tape
Inventor: DONGEN GERARDUS HUBERTUS VAN
IPC: B65F1/16
Filed: 1997-09-18
Granted: 1998-10-20
Abstract: Refuse bins with hinged lids are used in many places where collection and emptying is done by specialist vehicles. A disadvantage of these bins is that smells can escape round the loose lid and that pests, e.g. flies, mice, etc., can get into the bin. The inner secondary lid is fixed to the inside of the lid with double sided adhesive tape. The secondary lid protrudes downwards into the neck of the bin, making contact with the inside wall.
Patent NL-1009370-C1 (NL)
Title: Dispensing soldering material, preferably microspheres, for semiconductor or circuit board production - using a hollow needle housing a plunger operated by a linear servo mechanism
Inventor: VOSS LEONARDUS MATHEUS THEODOR
IPC: B23K3/06
Filed: 1998-06-11
Granted: 1999-07-13
Abstract: Soldering material is dispensed using a hollow needle housing a plunger operated by a linear servo mechanism. - A method for dispensing soldering material comprises the use of a hollow needle (4) housing a plunger (5) operated in a controlled manner using a linear servo mechanism.
Patent NL-1018733-C1 (NL)
Title: Method for applying an internal sheath to a pipe
Inventor: BOER RONALD DE
IPC: F16L55/165
Filed: 2001-08-09
Granted: 2003-02-17
Abstract: The invention concerns a method for applying an internal sheath to a tributary sewer (connecting a building up to the main sewer) that runs into the main sewer. A flexible folded-up tube is fed in through the tributary sewer. The internal sheath is attached to its external circumference. After the tube has been fed through the tributary sewer, pressurized fluid is forced into the tube; this is done in such a way that pressurizing the interior of the tube pushes the outer circumference of the tube against the interior wall of the tributary sewer.
Patent RU-2065461-C1 (RU)
Inventor: LIFSHITS ELEONORA B
IPC: G03C1/18
Filed: 1984-12-13
Granted: 1996-08-20
Abstract: FIELD: chemical-photography industry. SUBSTANCE: product: new sensitizing agents - bis-(3,3'-di-g-sulfopropyl-9-alkylthiocarbocyanine-betaine) and 3,3'-[1'', 2''-di-(ethoxy)-ethylene] -bis-(1-ethylbenzimidazolium) salts exhibiting sensitization maximum at 580-650 nm. These substances were used for synthesis of spectral sensitizing agents of bromine-iodine-silver photographic emulsions. EFFECT: improved method of synthesis. 2 tbl
Patent RU-2033231-C1 (RU)
Title: Game-puzzle
Inventor: PROSKUROV VALERIJ STEPANOVICH
IPC: A63F7/04
Filed: 1989-03-30
Granted: 1995-04-20
Abstract: FIELD: entertainment. SUBSTANCE: game-puzzle has transparent hollow body 1 with cover 2 and freely located in body game balls 3 with game marks. Located on bottom 4 of body 1 are, at least, two catchers 5 of game balls 3 having game marks. Catchers 5 are made in form of holes with entrance 6 whose diameter corresponds to diameter of game ball. Hollow of body 1 may be filled with transparent liquid. Part of game balls is made of material whose density exceeds density of liquid, and the material of the other part of balls has density which is less than that of liquid. One indicating hole 7 may be made in each game ball 3, and additional game marks may be made on body wall. Game-puzzle may have additional game balls whose diameter is smaller than that of indicating hole. Located in middle part of body may be lateral partition with passable and nonpassable holes. Game consists in striving to put game balls in holes in compliance with game marks on holes or body, direction to which is indicated by longitudinal axes of indicating holes. Game balls are put into holes by body shaking, inclination from one side to the other or turning over through 180 deg. EFFECT: improved entertainment. 10 cl, 7 dwg
Patent RU-2021339-C1 (RU)
Inventor: BARTLETT FILIP LII
IPC: C09K5/08
Filed: 1990-04-09
Granted: 1994-10-15
Abstract: FIELD: chemical industry. SUBSTANCE: the azeotropic composition comprises (% ): 40-80 1.1-dichloro-2.2.2- trifluoroethane; 20-60 1.1-dichloroethane as a cleaning solvent, a cooling agent and a foaming agent. EFFECT: improved properties of the azeotropic composition. 9 tbl
Patent RU-2006232-C1 (RU)
Title: Шприц
Inventor: SHUBIN IVAN A
IPC: A61M5/178
Filed: 1990-02-07
Granted: 1994-01-30
Abstract: Использование: в медицине для проведения инъекций. Сущность изобретения: в корпусе размещена пластина из материала с памятью формы, с отверстиями по ее периметру, имеющая прогиб в сторону поршня. 3 ил.
Patent RU-2008619-C1 (RU)
Title: Device for odorizing gas
Inventor: PURTOV VADIM A
IPC: G01F13/00
Filed: 1990-12-29
Granted: 1994-02-28
Abstract: FIELD: measurement technology. SUBSTANCE: position of membrane drive and weighing unit connected with the membrane through rod of weighing tip in output hole are changed depending on pressure differential of gas flux in diaphragm of pipe-line. Adjustment is carried out by means of changing rigidness of the membrane due to movable rest. EFFECT: improved precision of measurement. 1 dwg
Patent RU-2043854-C1 (RU)
Title: Compression mold for pressure die-casting with crystallization
Inventor: MARKOV VLADIMIR V
IPC: B22D18/02
Filed: 1991-01-08
Granted: 1995-09-20
Abstract: FIELD: foundry. SUBSTANCE: compression mold has die 2 with a rod comprising holder 6 and insertion piece 7 secured on punch 8. Rod cooling system has adjusting tank 14 with coolant inlet 15 and outlet 17 and 18 at upper and lower levels. The tank is connected to through passage 5 to cavity 3 of rod holder 6. Coolant enters the holder when casting stores in the die with open compression mold to provide increased compressed mold life time and decreased refuse of casting at the expense of decreased force arising in casting withdrawal. EFFECT: increased life time of compression molds. 6 dwg
Patent RU-2047181-C1 (RU)
Title: Current metering device
Inventor: AGADZHANYAN ARAM SURENOVICH
IPC: G01R19/00
Filed: 1991-01-14
Granted: 1995-10-27
Abstract: FIELD: metering of electric parameters. SUBSTANCE: device has main amplifier 1, reference-voltage source 2, loading element 3, retrieval and storage unit 4, current generator 5, compensating amplifier 6, retrieval and storage unit 7, current generator 8 incorporating additional amplifier 15(9), resistive divider using resistors 16,17(10,11), resistive current sensor using resistors 18(12), and resistive divider using resistors 19,20(13,14). EFFECT: enlarged functional capabilities. 2 dwg
Patent RU-2061481-C1 (RU)
Title: Средство, обладающее антиагрегационной активностью
Inventor: KOVALEV GENNADIJ V
IPC: A61K31/4184
Filed: 1991-05-17
Granted: 1996-06-10
Abstract: Изобретение относится к области медицины и может быть использовано для лечения диабета и диабетогенных ангиопатий. С целью разработки нового перорального средства для лечения сахарного диабета, осложненного ангиопатиями, изучено антидиабетическое и антиагрегантное действие дигидрохлорида 9-диэтиламиноэтил-2,3-дигидроимидазо[1,2-а] бензимидазола, обладающего гипогликемической активностью. Соединение при однократном введении в дозе 25 мг/кг снижает содержание глюкозы у животных с аллоксановым диабетом на 38%. При 10-дневном введении (ежедневно по 25 мг/кг) гипогликемическое действие соединения увеличивается в 1,5 раза. По силе гипогликемического действия вещество равно гликлазиду, в 1,5 раза превосходит манинил и 2,4 раза адебит, известные сахароснижающие препараты. Продолжительность сахароснижающего действия предлагаемого препарата соответствует длительности гипогликемического действия производных сульфонилмочевины - гликлазида и манинила и в 3 раза превосходит этот параметр производного бутилбигуанида-адебита. Сахароснижающий эффект вещества обусловлен его стимулирующим действием на секрецию инсулина из β-клеток поджелудочной железы, а также потенциирующим (в 2,7 раза) и пролонгирующим (в 1,5 раза) влиянием его на гипогликемическое действие этого гормона. Соединение является активным ингибитором агрегации тромбоцитов и по выраженности антиагрегантного действия в опытах in vitro в 37 раз превосходит гликлазид и в 16,4 раза ацетилсалициловую кислоту. В экспериментах по изучению влияния на внутрисосудистую агрегацию тромбоцитов, соединение оказывает дозозависимое антиагрегационное воздействие, превосходящее по выраженности эффекта в 23,3 раза ацетилсалициловую кислоту. 3 табл.
Patent RU-2009083-C1 (RU)
Title: Flying vehicle power plant
Inventor: GORDEEV VIKTOR F
IPC: B64D29/00
Filed: 1991-05-23
Granted: 1994-03-15
Abstract: FIELD: aircraft engineering. SUBSTANCE: suspension pylon of engine 1 is made from two parts 5 and 6 which have service joint 7. One of the parts 5 is fastened to engine 1 and is made in the form of a beam inside which oil tank 8 is positioned. The load-carrying pylon has a single connecting flange with guide pins which provide singularity of its positioning when assembling. Engine 1 is delivered for assembling on an aircraft with a preliminary mounted beam 5, accessories 17 and cowl 14. Oil tank 8 is filled with oil, cowl 15 of the second part of the pylon is removed. This provides free access to communications. EFFECT: improved reliability and operational manufacturability. 2 cl, 3 dwg
Patent RU-2006957-C1 (RU)
Inventor: ARONOV OLEG N
IPC: G09B9/06
Filed: 1991-05-27
Granted: 1994-01-30
Abstract: FIELD: trainers. SUBSTANCE: trainer has vessel electric station imitator provided with generating sets. One generating set is connected to user, and the other one is connected to propulsion sync electric motor imitator. Generating sets are controlled by control unit. Propeller imitator and tachometer generator are mounted on the same shaft with propulsion sync electric motor imitator. Propulsion electric motor imitator control unit applies excitation to electric motor after the latter is brought up to speed in async mode at reduced frequency and improved voltage from generating set. Propeller imitator control unit performs change in step of the propeller after propulsion sync electric motor imitator is brought into synchronism, after imitator is brought up to nominal rotational frequency and generating sets are synchronized. Commands imitating faults or wrong action are brought from operator desk. Improved efficiency of training is achieved due to bringing vessel imitator and accelerometer into trainer. EFFECT: improved efficiency of training. 2 dwg
Patent RU-2022017-C1 (RU)
Inventor: YAROVENKO VIKTOR L
IPC: C12P7/00
Filed: 1991-06-03
Granted: 1994-10-30
Abstract: Использование: пищевая промышленность, а именно производство спирта и других продуктов брожения. Сущность изобретения: приготовление спирта путем ввода дрожжей в питательное сусло, сбраживания его при непрерывном перетоке через батарею последовательно соединенных ферментов при атмосферном давлении, отбора рециркулятора и подачи его в головной ферментер, ввода в сбраживаемую среду ферментов и вывода зрелой бражки из хвостового ферментера, путем воздействия на сбраживаемую среду вакуумом в процессе сбраживания среды в первых 4 - 5 ферментерах батареи, путем отбора метаболитов, конденсации их с получением дистиллята и перегонки или ректификации, причем перед перегонкой дистиллят смешивают со слабоалкогольной зрелой бражкой. 1 з.п. ф-лы., 1 табл., 1 ил.
Patent RU-2034486-C1 (RU)
Title: Drying plant
Inventor: SHISHKIN VIKTOR V
IPC: A23B7/02
Filed: 1991-06-26
Granted: 1995-05-10
Abstract: FIELD: agriculture, food industry. SUBSTANCE: drying plant has drying chamber, gas distributing partition installed for travel in vertical direction, charging and discharging arrangements and heat carrier inlet and outlet systems. Novelty in device is that gas distributing partition in made in form of flexible porous hose one end of which is wound on reversing drum, and other end is turned inside out and secured over perimeter of drying chamber. EFFECT: enhanced quality of drying. 1 dwg
Patent RU-2021379-C1 (RU)
Title: Method of making of ingots from high-chromium cast iron
Inventor: MINNEKHANOV GIZAR N
IPC: C21C1/00
Filed: 1991-05-12
Granted: 1994-10-15
Abstract: FIELD: metallurgy. SUBSTANCE: method involves charge melting, superheating of melt up to 1600-1700 C, exposition for 1-15 min, melt cooling up to 1450-1600 C, and modifying agent addition. The latter has a mixture of chrome oxide powder with silicocalcium and calcium fluoride powders at the following ratio of components, wt.-%: chrome oxide 10-35; calcium fluoride 5-30; silicocalcium - the rest. Melt pouring is carried out at 1400-1450 C, and chrome oxide powder is utilized at concentration 0.03-0.30% of charge mass. EFFECT: improved method of ingot making. 1 tbl
Patent RU-2022505-C1 (RU)
Title: Composition of tea "artashat" substitute
Inventor: AVAKYAN OGANES G
IPC: A23F3/34
Filed: 1991-08-15
Granted: 1994-11-15
Abstract: FIELD: food industry, beverage production. SUBSTANCE: composition has long-leaf mint, St. John's-wort, petal-shaped rose, pear wilding fruits and safflower. Tea drink shows original taste and aroma, general strengthening and sanitizing action. Dry tea drink is packaged by portions (2.5-3 g per one infuse portion - 200 ml boiling water). EFFECT: enhanced quality of composition.
Patent RU-2018978-C1 (RU)
Title: Cartridge
Inventor: SHETTLE KLAUS
IPC: G11B23/087
Filed: 1991-10-24
Granted: 1994-08-30
Abstract: FIELD: writing, storing and reading of data. SUBSTANCE: cartridge has a body, including lower part, forming its bottom, and an upper part, forming its cover. The lower and the upper parts together form a rear and a lateral walls and at least a portion of a front wall. The bottom and the cover parts, adjacent with the front wall, are provided by convex portions. The front wall has at least one opening for receiving at least one magnetic head of the tape recorder. The cartridge also has two reels, mounted in the same plane, and a magnetic tape, which may be wound on the reels and unwound off them. The upper and the lower parts are mainly flat ones; the body has an additional portion, forming both convex parts and a large part of the front wall. The above mentioned additional part may be joined with the lower and the upper parts of the cartridge. EFFECT: simplified structure. 18 cl, 13 dwg, 1 tbl
Patent RU-2016906-C1 (RU)
Title: Method for making leather
Inventor: DANILKOVICH ANATOLIJ G
IPC: D06P3/32
Filed: 1991-08-23
Granted: 1994-07-30
Abstract: FIELD: leather manufacturing. SUBSTANCE: leather is tanned in one bath. After additional tanning with chromium containing tanning agent, the semi-product is subjected to the first-stage dyeing with acid dyes at 20-30 C, followed by tanning with synthetic dyes in which are introduced alums in the amount of 0.05-0.12% (by aluminum oxide) and formate-and-alcohol plasticizer in the amount of 0.15-0.35%. Then follow neutralization, second-stage dyeing with direct dyes at 55-60 C, and fat-liquoring. EFFECT: increased efficiency of the process. 2 tbl
Patent RU-2097032-C1 (RU)
Title: Фармацевтический препарат в форме крема
Inventor: KURT LINDER
IPC: A61K9/107
Filed: 1990-07-17
Granted: 1997-11-27
Abstract: Изобретение относится к новым фармацевтическим препаратам для лечения псориаза и condyloma acuminatum, которые имеют в своем составе подофиллотоксин в комбинации с жидким триглицеридом. 5 з. п. ф-лы.
Patent RU-2030282-C1 (RU)
Title: Vibration machine tool
Inventor: KHALIMULIN RAID MINULOVICH
IPC: B24B31/06
Filed: 1991-11-25
Granted: 1995-03-10
Abstract: FIELD: mechanical engineering. SUBSTANCE: machine tool has flexible platform 1 whereon containers 4 are mounted for permitting vertical and horizontal movements. Members 2 for setting and fixing part 3 to be worked are mounted on platform 1. Containers 4 are open and provided with seals 7 and mechanisms 6 of vertical movement. EFFECT: enhanced efficiency. 1 dwg
Patent RU-2000487-C1 (RU)
Inventor: GYAVGYANEN YURIJ V
IPC: F04F5/42
Filed: 1991-11-28
Granted: 1993-09-07
Abstract: Сущность изобретени : осевое пассивное  сопло камеры завихрени  пассивной среды размещено в камере завихрени  активной  среды с тангенциальным соплом.  Пассивное сопло снабжено тангенциальными  каналами. Камера активной среды выполнена  в виде плоской камеры ускорени   вихр . Пассивное сопло выполнено ступенчатым . 1 з. п. ф-лы, 8 ил.
Patent RU-2043274-C1 (RU)
Inventor: DOLGOV ANATOLIJ MIKHAJLOVICH
IPC: B65D88/00
Filed: 1991-10-28
Granted: 1995-09-10
Abstract: FIELD: transport engineering. SUBSTANCE: vehicle has spherical hollow housing, charging hatch with attachment arrangement and pressure spring, and cover. Vehicle of offered design can ride under any road conditions or along organized runway under action of hand power, under gravity or by applying mechanical force or torque. EFFECT: enlarged operating capabilities. 12 cl, 4 dwg
Patent RU-2047152-C1 (RU)
Title: Stand for dynamic tests of specimens
Inventor: LODUS EVGENIJ V
IPC: G01N3/34
Filed: 1991-12-10
Granted: 1995-10-27
Abstract: FIELD: testing materials for strength. SUBSTANCE: specimen 6 held by grips 5 and 4 is accelerated and is subjected to loading by repeated impacts at subsequent engagement of grip 4 with weights 3 movably mounted in guide 2. Accelerating the specimen is effected by means of revolving flywheel 8 and rod 7 pressed to it by means of device 10; rod 7 is connected with grip 5. After loading by repeated impacts, grip 4 is locked on guide by means of retainer 13. For subsequent loading of specimen by attenuating oscillating load, stand is provided with additional weight 11 which is movably mounted on rod and is connected with it by means of flexible member 14 and retainer 12 of additional weight on base. EFFECT: conducting tests at subsequent loading of specimen by repeated impacts, constant and attenuating oscillating loads. 1 dwg
Patent RU-2030987-C1 (RU)
Title: Saw frame
Inventor: SIDORENKO ALEKSEJ D
IPC: B27B3/00
Filed: 1991-12-13
Granted: 1995-03-20
Abstract: FIELD: wood working. SUBSTANCE: saw frame has front and rear guides arranged on bed frame opposite to each other. Fitted on bed frame guides is sawing frame mounted on four pairs of adjacent sliders. Sawing frame is coupled with drive providing its reciprocating motion. Sliders of each pair, as distinct from widely known sawing frames, are secured on (in) sawing frame housing for forced displacement in direction square to its plane and are furnished with spacing mechanism installed in between. Spacing mechanism in one design version is made in form of double-sided cam (eccentric) and in other design version, in form of wedge. In both design versions the mechanism is installed for controlled and fixed displacement and engagement with pushers thrusting against sliders either directly, or through wearing pieces. EFFECT: enhanced operating properties, simplified adjustment of clearances between guides and eccentricity of sawing frame. 3 cl, 6 dwg
Patent RU-2058969-C1 (RU)
Inventor: LINNIK SEMEN I
IPC: C04B40/00
Filed: 1991-12-27
Granted: 1996-04-27
Abstract: Изобретение относится к технологии изготовления строительных материалов и может быть использовано для повышения вяжущих свойств строительных материалов. Сущность изобретения: цемент помещают в электростатическое поле напряженностью 100 - 1000 В/см. Поле создается между пластинами плоского конденсатора, к которым прикладывается напряжение от выпрямителя. После обработки полем цемент используется для получения растворов и бетонов. 1 табл.
Patent RU-2021582-C1 (RU)
Title: Материал для пробки электродетонатора
Inventor: KASHUBA OLEG I
IPC: F42C19/12
Filed: 1992-01-03
Granted: 1994-10-15
Abstract: Цель изобретения: защита электродетонатора с оборванным мостиком накаливания от разряда статического электричества путем введения в материал для пробки электродетонатора, состоящий из полиэтилена высокого давления, полиэтилена электропроводящего П2ЭС-12 при следующем соотношении компонентов, % : полиэтилен высокого давления 65 - 75; полиэтилен электродпроводящий П2ЭС-12 25 - 35.
Patent RU-2030286-C1 (RU)
Title: Polishing mop
Inventor: KONDRATENKO VLADIMIR S
IPC: B24D13/14
Filed: 1991-12-17
Granted: 1995-03-10
Abstract: FIELD: polishing of glass. SUBSTANCE: industrial felt from chemical fibers in the form of a strip is heat treated at 90-140 C for 0.5-5 h, then felt strip is twisted into a spiral and secured on faceplate. EFFECT: higher efficiency. 1 tbl
Patent RU-2027049-C1 (RU)
Title: Control system for gas turbine engine with controlled turbine nozzle assembly
Inventor: KOSTYUKOV VENIAMIN M
IPC: F02C9/22
Filed: 1991-07-08
Granted: 1995-01-20
Abstract: FIELD: turbine engine engineering. SUBSTANCE: signals are fed from pickups 10 to amplifiers 11 which are shaped signals direct proportional to a magnitude of the radial space between faces of each blade 1 and inner contour. The signals are fed form each amplifier 11 to drives of longitudinal movements 9. The signals are simultaneously fed from pickups 10,12 to adders 13 in pair from each blade. In comparator 15, the signals from adders 13 are compared with the signals from controller 14 of minimum space. If at least one of the signals is less than the signal from the controller, the comparator shapes a signal on changing regime of the engine blade resulting in decreasing temperature in the flowing part. EFFECT: enhanced accuracy of control. 1 dwg
Patent RU-2041428-C1 (RU)
Title: Heating device
Inventor: MASLOVSKIJ GENNADIJ V
IPC: F24C11/00
Filed: 1992-03-02
Granted: 1995-08-09
Abstract: FIELD: home heating appliances. SUBSTANCE: heating device has a furnace chamber connected with oven and gas-duct. A gate is mounted in the top gas-duct, and closing controlling gate is mounted in the bottom gas-duct. The top and bottom walls of the oven are perforated and provided with detachable plugs. Shutters are pivotally connected with the perforated walls of the oven, the shutters in sizes being approximately the same as gas-duct. EFFECT: improved design. 6 cl, 4 dwg
Patent RU-2014371-C1 (RU)
Title: Rotary device for machining workpieces
Inventor: TOLOCHEK VALERIJ N
IPC: C25D19/00
Filed: 1992-03-10
Granted: 1994-06-15
Abstract: FIELD: printed integrated circuit card washing equipment. SUBSTANCE: inclined rest 14 is hinged on column 1 of bracket 12 for interacting with cantilevers 4 rigidly mounted on bushing 3 accommodated on column 1. Bushing 3 is attached for rotation to lifting ring 7 kinematically connected to electric motor 11. Spring-actuated fixing ball 17 is fitted on lifting ring 7 for accommodation in holes 19 made in bushing 3. Rest 14 is spring-actuated in the direction toward limiting projection 16 by means of spring 15. EFFECT: enlarged operating capabilities. 4 cl, 3 dwg