baber/WOPTO huggingface dataset:
Patent IE-87366-B1 (IE)
Title: A dispenser
Inventor: WILLIAM CASHMAN
IPC: G01F11/00
Filed: 2016-11-25
Abstract: The present invention is directed to a dispenser (100, 400) and more specifically to a metering device (104) for use with an associated hopper (102, 402). The dispenser (100, 400) comprises the hopper (102) which is located above the metering device (104). The metering device (104) dispenses preset amounts of granular material from the hopper (102). The amount of granular material dispensed from the dispenser (100, 400), through the metering device (104), is preset and may be altered. The metering device (104) comprises a chamber (110) and a rotatable dispensing bucket (114, 404A, 404B), whereby granular material from the hopper (102, 402) flows through the chamber (110) and into the rotatable dispensing bucket (114, 404A, 404B). The dispensing bucket (114) rotates about an axle from a filling position to a dispensing position in order to dispense the preset amount of granular material. The chamber (110) comprises a chamber opening (115), such that granular material which enters into the chamber (110) will be urged through the chamber opening (115) by virtue of a sloped floor (112, 408) in the chamber (110). The chamber opening (115) can be enlarged or reduced so as to alter the preset amount of granular material which is allowed through the chamber opening (115).
Patent IT-1280315-B1 (IT)
Title: Openable double-loop junction device
Inventor: PAGGINI ANTONIO
IPC: A44B/
Filed: 1995-01-12
Granted: 1998-01-15
Abstract: The invention consists of a junction device with a long- limbed structure with two components joined by a hinge 6 at one end, structured in such a way that in its closed condition it assumes an 8-shaped form, provided towards the centre and at the free ends with means of coupling by clipping; the two components are shaped in such a way that they are coupled when rotated through different angles, in such a way that the central means 3, 4, 9 and 10 also constitute an auxiliary fastener turned to maintain the device in the closed state for a brief angle of rotation, even when those at the ends 12, 13, 14, 15 and 16 are accidentally turned to the release state. <IMAGE>
Patent IT-1310386-B1 (IT)
Inventor: CARLETTI ENRICO
IPC: A61G1/003
Filed: 1999-04-28
Granted: 2002-02-13
Abstract: A safety connecting and hooking device for tubular elements, first (2a) and second (2b), particularly for stretcher, includes: a female element (3) whose first end is connected to said first tubular element (2a) and whose second free end has a seat (5) transversally crossed by a hooking pivot (4); a male element (6) whose first end is connected to said second tubular element (2b) and whose second free end has a bracket (7) detachably insertable complementary into said seat (5) of said female element (3), said bracket (7) having the head with a recess (8) in order to house partially said hooking pivot (4); a hook (10) hinged to said male element (6) and detachably insertable, in correspondence of a hooking condition (A) of said tubular elements (2a, 2b), into a slot (9) carried out longitudinally in the bracket (7) for closing partially the opening part of said bracket (7) around said hooking pivot (4); a safety hook (15) hinged to said female element (3) and whose hooking end is fit to engage a hollow (11) of said bracket (7) in correspondence of said hooking condition (A).
Patent IT-1268431-B1 (IT)
Title: Safety system for motor vehicles, preventing loss of oil from the brake circuit by automatic closing of a valve in event of rupture of a brake tube
Inventor: AMATO PAOLO
IPC: F02B/
Filed: 1993-11-10
Granted: 1997-03-04
Abstract: Safety arrangement for motor vehicles, enabling the continued operation of the brake system in the event of an accident involving rupture of an oil supply tube to the brake cylinders 1 in that it blocks the escape of oil by closing a special valve 2, located upstream from the tube itself, formerly held open by a probe 3, inserted inside the oil tube and secured to the end portion 4 of same and which, when its fastening is broken due to the accident, triggers a spring-activated mechanism 5, 6, located at the shoulders of the valve. <IMAGE>
Patent IT-1277463-B1 (IT)
Inventor: ZANOTTO UGO CESARE
IPC: B23Q1/01
Filed: 1995-08-09
Granted: 1997-11-10
Abstract: Machine-tool (1) for performing machining operations on workpieces (10) of undefined length such as sections, bars and the like, comprising a fixed support (2) having mounted on it the working head (3) which consists of a surface (5) perpendicular to the direction (X) of feeding of the workpiece, a first arm (6) perpendicularly mounted on said surface and translatable thereon by means of guides (6b) located on the surface itself, and a second arm (7) carrying the tool (8), perpendicularly mounted on said first arm (6) and movable with respect thereto, said working head being rotationally connected to the support (2) by means of an element (4) which can be rotated by associated actuating means (4b), said element (4) for rotationally connecting the head (3) and said support (2) being provided moreover with associated openings (4a, 2a) for passage of the workpiece (10) itself fed towards the working head (3) by associated translating means (9a, 9) acting in the said feeding direction (X) <IMAGE>
Patent IT-1297207-B1 (IT)
Title: Process for the packaging and preservation of foodstuffs, food and ready meals, drinks and fruit juices, milk and derivatives, wines, dietetic foodstuffs, preserved fruit and mineral waters in flexible packaging with endothermic microwave bacterial inactivation
Inventor: PARO BOZIDAR
IPC: A23B/
Filed: 1992-03-04
Granted: 1999-08-03
Abstract: The process for packaging and preservation with endothermic microwave bacterial inactivation (pasteurisation/sterilisation) comprises exposing the flexible plastics packaging (bags/trays) containing the food product under high vacuum to irradiation with very high radiofrequency waves (2450 MHz) which as a result of the Joule effect produce heat directly in the cells of the product contained in the packaging, which reach the lethal temperature in a very short time, the microorganisms being very much smaller than the cells of the product, without the product being raised to the same temperature. The heat treatment time is 5 to 20 times shorter than that for conventional systems, with the difference that the microorganisms are destroyed, not that their reproduction is inhibited. The product preserved in this way can be kept at ambient temperature for an indefinite period. Packages which are flexible after cooling are placed in cardboard boxes for protection from the light and to ease handling. The invention has immediate and extensive application in all branches of the food, pharmaceutical, herbal and similar industries.
Patent JP-2906141-B1 (JP)
Title: 高速撹拌方法及び高速撹拌装置
IPC: B01J13/00
Filed: 1998-05-22
Granted: 1999-06-14
Abstract: 【要約】
【課題】  液体を高速で混合撹拌して乳化させる際に、 微細化された液体の粒子径を簡単に予測できるようにす る。
【解決手段】  円筒形の容器２の中心に、容器内径Ａよ り僅かに小さい外径をφをもつ回転羽根１２を設け、小 間隙Ｓを保有させて高速回転させ、被処理液Ｌを容器内 面に沿った膜状に高速回転させながら撹拌し、製品を流 出管７から取出す。膜厚ｔは、堰板３の内径によってき まるが、蓋状の堰板を用いて任意の膜厚を形成する量の 被処理液を封入してバッチ処理することができ、この場 合は製品を原料供給管５，６から取出す。液体の回転に よって生じる圧力Ｐを圧力トランスミッタ１０によって 検出し、予め設定した圧力Ｐが生じるように回転羽根を 回転させれば、短時間で所望の粒子径が均等に形成され た製品が得られる。
Patent JP-2954571-B1 (JP)
Title: ゴム栓付加データ読み取り装置
IPC: G21C21/02
Filed: 1998-06-03
Granted: 1999-09-27
Abstract: 【要約】
【課題】  ゴム栓に付加されたデータの読み取り作業を 自動化し、作業員の労力を軽減すること。
【解決手段】  ゴム栓収納容器１には多数のゴム栓が収 納されている。ゴム栓保持部７が先端部に取り付けられ ているＺ軸アーム６は、Ｘ軸バー４及びＹ軸バー５の移 動により、取り出すべきゴム栓の上方位置に移動され る。次いで、Ｚ軸アーム６はゴム栓保持部７を、このゴ ム栓に向けて下降させる。そして、ゴム栓保持部７がゴ ム栓を保持すると、ゴム栓保持部７は上昇し、データ読 み取り機２まで移動される。そして、データ読み取り機 ２において、ゴム栓に付加されたデータの読み取りが行 われる。
Patent JP-2994355-B1 (JP)
Title: 食品成形機における食品材料移送機構
IPC: A23L7/10
Filed: 1998-09-09
Granted: 1999-12-27
Abstract: 【要約】
【課題】  食品材料、特に米飯を主材料とした食品材料 を自動的に所定量づつ安定して供給することを可能にす る。
【解決手段】  供給される食品材料１７に圧縮と弛緩を 繰り返し行いながら成形部に所定量づつ供給する食品成 形機における食品材料移送機構において、圧縮と弛緩を 繰り返して行う一対の押圧部材３８を所定間隔をおいて 対向配置するとともに、前記押圧部材３８の下部には、 押圧部材の開閉動作による圧縮と弛緩を行いながら食品 材料１７にかかる重力と併せて密度調整が行われた前記 食品材料を下方に供給すための供給ロ−ラ４０が所定間 隔をおいて対向配置された。
Patent JP-2963902-B1 (JP)
Title: シロアリ生息確認装置
IPC: A01M1/02
Filed: 1998-11-19
Granted: 1999-10-18
Abstract: 【要約】
【目的】  誘引材を収納したケース内部を適切な湿度に 保ち、シロアリを確実に誘引してその生息確認を正確に 行わしめる。
【構成】  シロアリの誘引材１を収納し、かつ上部開口 部２を地表に出した状態で地中に埋設される縦筒状のケ ース３と、このケース３の上部開口部２の周囲を取り囲 む伏せ椀状のカバー体４とを有し、上記カバー体４の天 板部５の内側を、上記ケース４の上部開口部２に向け下 降傾斜するよう形成して、この天板部５内側に付着する 結露水Ｓを上記ケース３の上部開口部２に落下させる。
Patent MD-4281-B1 (MD)
Title: Metering device for inhaling a powdery substance
Inventor: VON SCHUCKMANN ALFRED
IPC: A61M15/00
Filed: 2008-10-29
Abstract: The invention relates to metering devices, namely to metering devices for inhaling powdery substances, in particular of medicinal type.The metering device (1) is activated by the suction airflow of the user for inhaling a powdery substance (2). The powdery substance (2) is arranged in a supply chamber (15) and can be brought out of the supply chamber into an apparent discharge standby position (B) by means of a metering chamber (40) of a metering rod (33). The metering chamber (40) is sealed off with a piston (54), made in the upper zone in the form of a disk. The piston is provided with piston-extensible tabs (77) for sealing off the metering chamber (40) or a plurality of metering chambers into an apparent discharge standby position, which open the metering chamber (40) when the piston (54) is displaced by the suction airflow of the user.
Patent NO-328420-B1 (NO)
Inventor: WOBBEN ALOYS
IPC: F03D80/70
Filed: 2003-07-18
Abstract: In a wind power installation with a (hollow) axis tube member and a hollow shaft mounted thereon for the rotor there is provided only a single bearing which also carries moments, between the axis tube member and the hollow shaft, whereby the parts of the machine which are to be fixed to the machine carrier and thus on the top of the pylon are of a markedly lower weight without the required orientation between the rotating and stationary parts of the electrical generator being adversely affected. In that arrangement the rotating part of the generator is radially aligned substantially with the bearing. The bearing to be used is in particular a twin-row inclined roller bearing with rows of rollers arranged at an angle of about 45° relative to each other.
Patent NO-328732-B1 (NO)
Inventor: SUNDHOLM GORAN
IPC: A62C35/08
Filed: 2004-08-17
Abstract: A valve element ( 20 ), comprising a frame ( 21 ), at least one first inlet ( 26 ), at least one second inlet ( 27 ) and at least one outlet ( 28 ). The valve element consists of a combination comprising at least one burst disk ( 23 ) or equivalent, which, when unbroken, closes a passage from the second inlet ( 27 ) at least to the outlet ( 28 ), and a piston element ( 25 ) comprising a piercing element ( 24 ) or the like for piercing the burst disk, said piston element being arranged to be movable between at least two positions when the burst disk has been pierced, in which first position the passage from the second inlet ( 27 ) to the outlet ( 28 ) is closed while in a second position the passage from the second inlet ( 27 ) to the outlet ( 28 ) is open, to which second position the piston element is moved after the pressure difference between the second inlet and the first inlet has reached a predetermined value.
Patent NO-322624-B1 (NO)
Title: Heterobiarylderivater, et farmasoytisk preparat omfattende disse samt deres anvendelse for fremstilling av et preparat.
Inventor: O'BRIEN PATRICK MICHAEL
IPC: C07D417/12
Filed: 2005-03-10
Abstract: Foreliggende oppfinnelse tilveiebringer forbindelser definert ved formel I eller et farmasøytisk akseptabelt salt derav, hvori R1, Q, S, T, U, V og R2 er som definert i beskrivelsen. Oppfinnelsen tilveiebringer også farmasøytiske sammensetninger som innbefatter en forbindelse med formel I, eller et farmasøytisk akseptabelt salt derav, som definert i beskrivelsen, sammen med en farmasøytisk akseptabel bærer, fortynningsmiddel eller eksipient. Oppfinnelsen tilveiebringer også fremgangsmåter for å inhibere et MMP- 13 -enzym hos et dyr, som innbefatter administrering til pattedyret av en forbindelse med formel I eller et farmasøytisk akseptabelt salt derav. Oppfinnelsen tilveiebringer også fremgangsmåter for behandling av en sykdom formidlet av et MMP-13-enzym hos en pasient, som innbefatter administrering til pasienten av en forbindelse med formel I, eller et farmasøytisk akseptabelt salt derav, enten alene eller i en farmasøytisk sammensetning. Oppfinnelsen tilveiebringer også fremgangsmåter for å behandle sykdommer, slik som hjertesykdom, multippel sklerose, osteo- og reumatoid artritt, artritt forskjellig fra osteo- eller reumatoid artritt, hjerteutilstrekkelighet, inflammasjonsbowelsykdom, hjertesvikt, aldersrelatert makular degenerering, kronisk obstruktiv pulmonær sykdom, astma, periodontale sykdommer, psoriasis, aterosklerose og osteoporose hos en pasient, som innbefatter administrering til pasienten av en forbindelse med formel I, eller et farmasøytisk akseptabelt salt derav, enten alene eller i en farmasøytisk sammensetning. Oppfinnelsen tilveiebringer også kombinasjoner som innbefatter en forbindelse med formel I eller et farmasøytisk akseptabelt salt derav, sammen med andre farmasøytisk aktive komponenter som beskrevet i beskrivelsen.
Patent NO-337212-B1 (NO)
Inventor: KING GRAEME NEVILLE
IPC: A22C25/12
Filed: 2005-07-01
Abstract: A fish stunning apparatus comprising a fish stunning device (100) including a striker (400); said striker (400) including a cylinder and a piston (443), said piston (443) movable between a retracted position and an extended position; a fish guide (200) having an entrance (230) and an exit (240); said fish guide (200) guiding a fish below said striker (400) so that said piston (443) contacts said fish when said piston (443) is in the extended position; trigger (300) to cause said piston (443) to be moved from the retracted position to the extended position when said fish is passed through said fish guide (200); wherein said fish is moved unidirectionally from said entrance (230) through said guide (200) to the exit (240). A fish guide (200) comprising an entrance (230), an exit (240) and a pivotally movable floor (220) and a table for distributing fish for stunning are also disclosed.
Patent NO-341598-B1 (NO)
Title: Forbedrede brønnvæsker og fremgangsmåte for bruk i underjordiske formasjoner.
Inventor: HEATHMAN JAMES F
IPC: E21B33/13
Filed: 2006-09-27
Abstract: Foreliggende oppfinnelse angår forbedrede brønnvæsker som inkluderer hule partikler samt fremgangsmåte ved bruk av slike brønnvæsker i underjordiske sementeringsoperasjoner. Ved fremgangsmåten tilveiebringes en brønnvæske som omfatter en basisvæske og en del hule partikler. Brønnvæsken plasseres i et underjordisk ringrom slik at minste en del av brønnvæsken å bli innelukket i ringrommet. En sementblanding plasseres i et underjordisk ringrom og gis anledning til å stivne i ringrommet. Minst noen av de hule partikler brister under trykkøkning og bidrar til å redusere trykkoppbygging i ringrommet
Patent NO-335370-B1 (NO)
Title: Akustisk reflektor
Inventor: SMITH JOHN DARREN
IPC: G10K11/28
Filed: 2007-07-12
Abstract: Det er beskrevet en akustisk reflektor (1 0) som er egnet for bruk som et reflekterende mål for navigasjonshjelpemidler og for lokaliserings- og relokaliseringsanvendelser. Den akustiske reflektor har et skall (12) anordnet omkring en fast kjerne (16). Skallet er tilpasset for å sende akustiske bølger (18) som faller inn på det, inn i kjernen (16). Inne i kjernen fokuseres de akustiske bølger før de reflekteres fra en motstående side av skallet (20) for å gi en reflektert akustisk bølge. En del av de akustiske bølger som faller inn på skallet kobles inn i skallveggen og ledes inne i denne og omkring dens omkrets (26) før de stråles ut på ny og settes konstruktivt sammen med en reflekterte akustiske bølge, for å gi en forbedret, reflektert akustisk bølge.
Patent NO-328275-B1 (NO)
Title: Sammenforingssystem for to bygningselementer og fremgangsmate for sammenforing av to bygningselementer.
Inventor: BERG SVEIN
IPC: B28B23/00
Filed: 2007-08-01
Abstract: Den foreliggende oppfinnelsen angår et sammenføringssystem for fastgjøring av et første bygningselement (1) i forhold til et andre bygningselement (2), hvor en første del (10) omfatter et kasseelement (100) tilpasset for innstøpning i det ene bygningselementet (1,2). I henhold til oppfinnelsen er et løfteelement (110) fastgjort til kasseelementet (100), hvilket løfteelement (110) omfatter et innfestingsparti (111) tilpasset for samvirkning med løfteutstyr, hvilket innfestingsparti (111) under en installasjonsfase av sammenføringssystemet befinner seg relativt utenfor en ytterside (3) av det ene bygningselement (1,2) omfattende kasseelementet (100).
Patent NO-341172-B1 (NO)
Inventor: DRUZGALA PASCAL
IPC: A61K31/35
Filed: 2008-02-15
Abstract: The invention comprises compounds of Formula 1:   
wherein, R 1  is independently H or halogen; R 2  is, for example, H or --R 10 -NR 11 R 12 , and wherein R 10  is C 1 -C 6  alkyl, and R 11  and R 12  are independently H, C 1 -C 4  alkyl, and hydrates, solvates, salts and tautomers thereof. The invention further comprises methods for making the compounds of the invention and methods for making compounds useful in the treatment or prevention of cardiac arrhythmia from the compounds of the invention.
Patent NO-329736-B1 (NO)
Title: Skip
Inventor: RAMDE ROAR
IPC: B63B1/02
Filed: 2009-09-22
Abstract: Skip av deplasement-typen med et Ramformskrog som har et akterspeil (100), en langskips lengde L i konstruksjonsvannlinjeplanet (300), et basisplan (400) parallelt med konstruksjonsvannlinjeplanet i en avstand T tilsvarende skrogets konstruksjons-dypgående, og omfattende i det vesentlige sinusformede vannlinjer, et skråplan (200) som utgjør bunnen i akterspeilet (100) ved konstruksjonsvannlinjeplanet (300) til basisplanet (400) ved omkring L/2, og en utbulning på hver side og over en vesentlig lengde av skroget med avslutning i forskipet forenom lengden L i et tungelignende bulbelement (900). Forholdet mellom lengden L og bredden B av skroget er mindre enn 1/2*tan 19,47 ~ 1,4, basert på Kelvins vinkel 19,47 grader, og forholdet mellom bredden B og konstruksjonsdypgående T er vesentling større enn 7, fortrinnsvis mellom 10 og 12.
Patent PL-162292-B1 (PL)
IPC: C07C251/70
Filed: 1989-12-18
Abstract: Sposób wytwarzania bis-oksymu d,l-4,8-diaza-3,6,6,9-tetrametyloundekano-2,10-dionu
znakowanego technetem 99mTc w reakcji znakowanej soli nadtechnetanu z bis-oksymem d,l ,4-8-
diaza-3,6,6,9-tetrametyloundekano-2,10-dionu wobec soli dwuwartościowej cyny, znamienny
tym, że sól dwuwartościowej cyny stosuje się w postaci kompleksu z pirofosforanem metalu
alkalicznego lub amonowym.
Patent PL-162346-B1 (PL)
Inventor: KORULCZYK GRZEGORZ
IPC: E03F5/14
Filed: 1990-02-09
Abstract: Krata koszowa zawieszana złożona z
pionowej ramy nośnej, trzech poziomych
wsporników, wciągarki z linką i ażurowego
kosza, znamienna tym, że kosz kraty posiada
uchylne dno (9), które jest utrzymywane w
położeniu “zamknięte" za pomocą kabłąka
(10) połączonego na sztywno z dnem (9) kosza i
napiętego zapadką (11) osadzoną na obrotowym
drążku (12), do którego przymocowane
są dwa zaczepy (13) linki nośnej kosza, nachylone
pod kątem ostrym do poziomu, tak że
razem z zapadką (11) tworzą dźwignię dwuramienną,
przyciskającą zapadkę (11) do kabłąka
(10) pod wpływem masy kosza, który
opiera się na wsporniku dolnym (7) w położeniu
dolnym, natomiast konstrukcja kraty
utrzymywana jest na wsporniku środkowym
zawieszonym na krawędzi zbiornika.
Patent PL-162517-B1 (PL)
Inventor: RYBIANSKI MAREK
IPC: B65D88/26
Filed: 1990-04-09
Abstract: Lej zbiornika materialów sypkich, zna- mienny tym, ze u nasady ma sciany (2) o profilu prostoliniowym, a w czesci dolnej sciany (3) o profilu krzywoliniowym, zas w miejscu polaczenia profili (4), sciany (2), (3) nachylone sa pod tym samym katem, nato- miast srodek ciezkosci otworu (5) wysypo- wego nie pokrywa sie z osia (1) zbiornika. F ig . 1 PL
Patent PL-165379-B1 (PL)
Inventor: LENARTOWICZ JAN
IPC: F27B3/08
Filed: 1990-06-05
Abstract: 1. Odciag gazów i pylów elektrycznego pieca lukowego majacy glówny przewód od- ciagowy umieszczony w sklepieniu pieca i majacy indywidualne komory obejmujace przestrzenie wokól elektrod, zas w obrebie elektrod znajduja sie pierscienie kierujace, a sciane boczna kazdej indywidualnej komory stanowi rozprowadzajacy kolektor z otwora- mi i/lub szczelinami od strony elektrody, znamienny tym, ze kolektory (3) polaczone sa przewodami wyrównawczymi (6), a skle- pienie komory (2) stanowia ksztaltki (9) wsparte o kolektor (3), zas kazdy z kolekto- rów (3) polaczony jest z ramieniem (13) osadzonym drugim koncem, za pomoca ele- mentu mocujaco— zabezpieczajacego (11), na pierscieniu oporowym sklepienia (1). Fig.1 PL PL PL PL PL PL
Patent PL-163645-B1 (PL)
Title: Compensation type coupling with insert
Inventor: TURALA JERZY
IPC: F16D3/04
Filed: 1990-11-06
Abstract: A compensating clutch with a joining insert for torque transmission from a shaft to another shaft, whereas clutch disks are seated on ends of those shafts, whereas the joining insert is shaped as a full or hollow cylinder with cross-like protrusions, and the clutch disks include grooves for the insert protrusions, characterized in that the insert (3) on one side has known alternately-located tooth-like protrusions (11) or a fin (11) that engages the grooves (4) in the first clutch plate (1), whereas on the other side, the insert (3) includes the T-shaped fin (12) that engages the T-shaped groove (6) in the second disk (2), whereas both the second disk (2) and the T-shaped fins (12) of the insert (3) include circumferential grooves (7, 13) for a flat spring (8), that preferably has a circular crossection.<IMAGE>
Patent PL-167801-B1 (PL)
Inventor: GRADON LEON
IPC: G01N11/16
Filed: 1991-07-24
Abstract: 1· Sonda do pomiaru lepkości cieczy, zawierająca
obudowę z uchwytem przewodu elektrycznego, osadzonego
na jednym końcu oraz osadzony wewnątrz
przetwornik piezoceramiczny z naniesionymi na powierzchnię
elektrodami, zamocowany do powierzchni czołowej
pręta, korzystnie z topionego kwarcu, osadzonego
w uchwycie, który stanowi węzeł drgań, zaś na drugim
końcu obudowy usytuowany koniec pręta, stanowi czujnik
pomiarowy, znamienny tym, że pręt(2) zamocowany
jest w uchwytach (3), umieszczonych w dwóch
węzłach drgań (2.2,2.3), korzystnie skrajnych, natomiast
obudowa (A)składa się z segmentów (6,7) z elementami
osiowej regula
cji punktów mocowania pręta (2).
Patent PL-165832-B1 (PL)
Title: Method of obtaining monodomain monocrystals of lithium tantalate exbibiting any orientation
Inventor: PRACKA IZABELA
IPC: C30B33/00
Filed: 1991-10-10
Abstract: A method for obtaining lithium tantalate monodomain monocrystals of any orientation, consisting in the crystal pulling by the Czochralski method, and then in the polarization of the lithium tantalate monodomain monocrystals at temperature by approx. 20 K higher that the Curie point for lithium tantalate in an oxidizing atmosphere, whereas the polarization consists in passing constant current through the monocrystal and cooling to a room temperature, whereas from approx. 803 K, the polarization is carried out with an electric field applied, characterized in that the monocrystal's flat side wall located at right angle to its Z axis, or the top conical surface where the crystal growth begins in the direction similar to the Z axis, is covered with a mixture of lithium tantalate powder with 17-23% per weight water content, and then water is vaporised during the first stage of heating the monocrystal thus obtaining a thin lithium tantalate baked layer being the negative electrode, whereas the opposite monocrystal surface is put on a lithium tantalate powder bed being the positive electrode, and after heating the monocrystal to approx. 903 K in an oxygen atmosphere, direct current of 0.05-0.20 mA/cm<2> direct current is transmitted between the electrodes for approx. 30 minutes in the electric field of 150-200 V/cm.