baber/WOPTO huggingface dataset:
Patent CN-1764482-A (CN)
Inventor: GIANLUCA GAZZA
IPC: A61F2/82
Filed: 2003-05-22
Abstract: 本发明涉及血管支架。更具体地，本发明涉及包括透明质酸聚合物基涂层的支架，其中所述透明质酸聚合物为透明质酸酯衍生物。
Patent CN-85106515-A (CN)
Title: 视频信号记录和再生设备
IPC: H04N5/782
Filed: 1985-08-30
Abstract: 一种视频信号记录和再生设备，其中提供了一种装置。在此装置中，垂直预加重电路和垂直去加重电路在一给定周期内实际上停止工作。此给定周期至少包括一个输入视频信号的垂直回扫线消隐周期，所述输入信号未经修正即被释放。输出信号只有在给定周期以外其它周期中才被输出。
Patent CN-1089019-A (CN)
Title: 乳化齿轮油实用掺水工艺
Inventor: XIANGBIN CHEN
IPC: F16N39/00
Filed: 1992-12-30
Abstract: 本发明为在温度高、易进水的热轧等环境下工作
的齿轮箱用乳化齿轮油实用掺水工艺。其特点是利
用齿轮箱中30～70℃的工作温度和齿轮往复运转的
工作条件，在常温常压下，由上自下以喷雾方式向乳
化齿轮油中加水，实现因蒸发失水和进水污染的乳化
齿轮油重新乳化，继续正常使用。此方法简单易行，
且大大节省能耗，减轻了劳动强度，杜绝了事故发生，
减少设备维修量和事故时间，经济效益显著。
Patent CN-1076574-A (CN)
Title: 用于视频显示的数据信号控制振荡器
Inventor: KOBLITZ KARL RUDOLF
IPC: H04N5/12
Filed: 1993-03-01
Abstract: 由总线控制的水平振荡器31的自由振荡频率
通过编程不能修改并耦合到数/模转换器40的第
二数据信号DATA2而得到调节。编程是在包括振
荡器的晶片制造过程中进行的。来自微处理机35
经由总线(BUS和第二数/模转换器41加到振荡器
的第一数据信号DATA1)能改变振荡器的自由振荡
频率以提供容差补偿。第一数据信号可克服数据误
差，第二数据信号不能克服数据误差，但能使振荡器
频率在相对窄的范围值内变化。
Patent CN-1097004-A (CN)
Inventor: QIANG WANG
IPC: C07C29/38
Filed: 1993-12-21
Abstract: 本发明涉及到甲醛衍生物的制备方法，特别是

单、双、叁季戊四醇的制备方法及设备。主要特征是

采用了高低温低配比的缩合工艺和液体加速器的分

离工艺，它能使单、双、叁季戊四醇得到有效的分离。

该方法是在确保工业季戊四醇的产量、质量的前提

下，提高了单、双、叁季戊四醇的转化率和收率，大幅

度地提高了季戊四醇生产的综合经济效益，是一种较

为理想的单、双、叁季戊四醇的制备方法。
Patent CN-1108180-A (CN)
Inventor: CERASO BRUNO
IPC: B32B15/08
Filed: 1994-03-10
Abstract: 一种通过形成一个或多个叠在一堆的合板
(51-54)生产特别适用于印刷电路的带金属箔的塑
性叠片的方法。合板是由浸渍了塑性材料的基底材
料带(30-32)和一条或两条铜带(33、34)一起连续送
进的多层带(45)而得到的。
Patent CN-1132953-A (CN)
Inventor: CHUNG HYUNG-DONG
IPC: H03K17/00
Filed: 1995-04-13
Abstract: 一种高功率脉冲化激光驱动器，包含有一个具有非均匀条状线构造或均匀条状线构造的低阻抗储能电容器，因此，可以大大减小激光器阵列的电能损失，同时又保持了高效率、重量轻和体积小的优点。
Patent CN-1187788-A (CN)
Inventor: BREW J E
IPC: B32B27/08
Filed: 1996-03-28
Abstract: 一种具有改进的防潮特性和增强的机械性能的聚合物膜结构。该膜结构包括由全同立构规整度大于93%的高结晶度聚丙烯和最高达8重量%的树脂改性剂形成的底层。
Patent CN-1194322-A (CN)
Title: 金属复合网架
Inventor: LI HUIDONG
IPC: E04B1/342
Filed: 1997-03-20
Abstract: 一种用于建筑结构的金属复合网架,是由外包覆不锈装饰层的低碳钢或低合金钢复合管件与复合球连接而成;制造时首先加工出复合管和复合球,然后根据建筑设计要求将其焊接或用螺栓连接在一起,连接缝处再包覆一层不锈装饰层。其特点是强度高、耐腐蚀和高档装饰性;具有较低的加工制造成本和维护费用。
Patent CN-1188032-A (CN)
Inventor: HE WEI
IPC: B23K31/02
Filed: 1997-01-15
Abstract: 本发明涉及一种焊接工艺,采用直长型连续焊条,Ⅰ型坡口焊接厚度7—12mm,直径Φ114—Φ1620mm的管道,采用连弧法单面焊双面成型,仅需在管道仰焊部位开制小角度坡口。可提高焊接生产率,降低焊接成本,减轻工人劳动强度。
Patent CN-1185610-A (CN)
Title: 图象信息检索装置、图象数据库装置、图象信息存储装置
Inventor: TERUO HAMANO
IPC: H04N1/327
Filed: 1997-10-20
Abstract: 一种图象信息检索装置,具有:初始服务控制信息存储部;应答部;检索处理部;二次服务控制信息存储部;控制部。使用本发明的图象信息检索装置和图象数据库,可实现即使多人在任意的时间内分别进行图象信息的追加、删除,也不需要一一改写图象信息检索装置的服务控制程序。
Patent CN-1205525-A (CN)
Title: 稀土－铁氮化物永磁材料的制备方法
Inventor: ZHOU MEILING
IPC: H01F1/059
Filed: 1998-06-03
Abstract: 一种稀土－铁氮化物永磁材料的制备方法,属于磁性材料制造技术领域。该方法的步骤如下:将至少一种为钠米粉末的稀土元素R、Fe和M按一定比例混合,机械合金化1～16小时,在600～900℃晶化处理15～30分钟形成1∶12型化合物R(Fe,M) 12 ,在350～550℃、1个大气压氮气中,氮化1～5小时,获得1∶12型结构的稀土－铁氮化物R(Fe,M) 12 N x 。该方法工艺简单,并且制备出R(Fe,M) 12 N x 永磁材料晶粒细小、纯度高、性能优良,可广泛应用于电器、电机及电子仪器中。
Patent CN-1250673-A (CN)
Title: 具有高强度和高容量填料的低温精馏系统
Inventor: PYRINHAM J F
IPC: F28F25/08
Filed: 1999-09-30
Abstract: 低温精馏系统,填料组件,适于低温精馏并具有填料板的塔,填料的顶边和底边交替有变化,顶边和底边优选地终止在两个平面上,其中容量和传质效率得到增强,机械强度也未受损害。
Patent CN-1333842-A (CN)
Title: 可湿润和抗侵蚀/氧化的碳复合材料
Inventor: MIRTCHI A A
IPC: C04B35/52
Filed: 1999-11-16
Abstract: 本方法包括磨碎的定量的TiO 2 和B 2 O 3 (或其它金属硼化物前体)彼此混合,以生成前体混合物,然后将此前体混合物与至少一种含碳组分相混合以生成碳复合材料,当暴露于熔融铝中或经受槽的起动和运行的热的作用时,便在现场形成TiB 2 (或其它金属硼化物)。本发明还涉及这样生产出的碳复合材料,这类材料可以用来形成构造阴极结构用的块料(或用于这类块料的涂料)或可以用来制备嵌缝充填组分和涂料组分供铝还原槽用,或制备供与熔融金属一起使用的仪器用防护涂料。
Patent CR-20150488-A (CR)
Title: Conjugados fármaco-anticuerpo
Inventor: ABRAMS TINYA
IPC: C07K16/28
Filed: 2015-09-14
Abstract: La presente invención se refiere a anticuerpos anti-cKit, fragmentos de anticuerpos, conjugados de fármacos con anticuerpos, y sus usos para el tratamiento del cáncer.
Patent CR-20180118-A (CR)
Title: Composiciones de insulina de rápida acción
Inventor: NGUYEN CHI A
IPC: A61K47/12
Filed: 2016-08-19
Abstract: La presente invención se refiere a una composición farmacéutica de insulina humana o análogo de insulina que incluye citrato, treprostinilo y agentes estabilizantes, que tiene acción farmacocinética y farmacodinámica más rápida que las formulaciones comerciales de productos análogos de insulina existentes y que es estable para uso comercial
Patent CR-20210372-A (CR)
Title: Modulators of the integrated stress pathway
Inventor: FROST JENNIFER M
IPC: C07D471/04
Filed: 2017-05-05
Abstract: Provided herein are compounds, compositions, and methods useful for modulating the integrated stress response (ISR) and for treating related diseases; disorders and conditions.
Patent CR-20220242-A (CR)
Title: Mezcla para la construcción industrial, agrícola y civil
Inventor: BRIAN RUSSELL AMIR
Filed: 2022-06-01
Abstract: La invención se refiere a la producción de hormigón ligero a base de cemento Portland y relleno de madera, y puede utilizarse para la fabricación de material de construcción destinado a la construcción industrial, agrícola y civil. La mezcla incluye cemento Portland, relleno de madera, cloruro de calcio y agua. La mezcla también contiene arena como aglutinante aditivo. Además, para aumentar la resistencia del material, se añade a la mezcla la fibra de coco, cuya cantidad es de 5%. El resultado técnico obtenido es que la mezcla tiene una resistencia a la compresión 1,2-1,5 veces superior a la de las mezclas de construcción estándar. Además, el consumo de cemento Portland se reduce en 18-22%.
Patent EC-SP003796-A (EC)
Title: Procedimiento para la obtencion de 1,2,3,,4-tetrahidroquinolinas 4-carboxiamino-2-sustituidas
Inventor: DAMON DAVID BURNS
IPC: C07D215/42
Filed: 2000-11-30
Abstract: Esta invención se refiere a inhibidores de la proteína de transferencia de ester colesterilico (CETP) y a un procedimiento para la onteneción de tales inhibidores. Especialmente esta invención se refiere a 4-toluensulfonato del éster etilico del ácido 4-(3,5-bis-trifluorometilbencilamino)-2-etil-6-trifluorometil-3,4-dihidro-2H-quinolina-1-carboxilico y al estereoisomero ester etilico del ácido (-) -(2R,4S)-4-(3,5-bistriflourometilbencilamina)-2-etil-6-trifluorometil-3,4 dihidro-2H quindina-1-carboxilico o sales del mismo. También comprende un procedimiento para la preparación de 4-toluensulfonato dekl ester etilico del ácido (-) -(2R,4S) -4-(3,55-bis-trifluorometilbencilamino) -2-etil-6-trifluorometil-3,4-dihidro-2H-quinolina-1-carboxilico que comprende: a) combinación del ester etilico del ácido 4-amino-2-etil-6-trifluorometil -3,4-dihidro-2H-quinolina-1-carboxílico y ácido (-)-dibenzoil-L-tartárico (anhidro) ó ácido (-) -di-p-toluoil-L-tartárico para formar la sal del ácido (-)-dibenzoil-L-tartárico o la sal del ácido di-p-toluoil-L-tartárico del mismo: b) combinación de la sal resultante, 1,2-dicloroetano y una base acuosa con 3,5-bis (trifluorometil)benzaldehido, seguido de la adición de triacetoxiborohidruro de sodio; y c) adición de ácido de 4-toluenosulfónico monohidratado.
Patent EC-SP045300-A (EC)
Title: Antígenos virales
IPC: A61P31/12
Filed: 2004-09-17
Abstract: La presente invención se refiere a una composición de vacuna que comprende VLPs conteniendo proteínas L1 o derivados de proteínas funcionales L1 de genotipos HPV 16, HPV 18, HPV 31 y HPV 45.
Patent EC-SP088951-A (EC)
Title: /composición farmacéutica estable que contiene docetaxel y método para su fabricación
Inventor: KIM NAM HO
IPC: A61K9/08
Filed: 2008-12-11
Abstract: La presente invención se relaciona con una composición farmacéutica estable para inyección que contiene docetaxel y un método de preparación de la misma. Más particularmente, la presente invención se relaciona con una composición farmacéutica para inyección que contiene docetaxel que tiene mejor estabilidad de almacenamiento que las medicaciones convencionales, que se prepara disolviendo el docetaxel, un compuesto insoluble en agua, en agua destilada después de mezclarlo con la ciclodextrina (CD) y un polímero soluble en agua, tal como metilcelulosa hidroxipropil (HPMC), glicol de polietileno (PEG ) o (PVP) y liofilizando la mezcla, y un método para prepararla.
Patent EC-SP951585-A (EC)
Title: Composiciones extruidas que presentan un alto estiramiento y un espesor de salida sustancialmente reducido
Inventor: JAIN PRADEEP
IPC: B29C48/08
Filed: 1995-11-14
Abstract: El invento se refiere a una composición extruída de polímeros etilénicos con un alto estiramiento y espesor de salida substancialmente reducido, un proceso para elaborar dicha composición y un proceso para preparar revestimientos de extrusión, perfiles de extrusión, y películas moldeadas por extrusión. La composición extruida de los polimeros etilénicos está compuesta de 75-95 por ciento y 5-25 por cineto del peso de por lo menos un entre polímero etilénico de alta presión caracterizado por tener una alta fuerza de fundición y una amplia distribución bimodal de peso molecular. En los perfoles, revestimientos o películas la composición puede ser utilizada como sellador, adhesivo o capas resistentes al abuso.
Patent EC-SP993090-A (EC)
Title: Composicion farmaceutica de proteinas erizo y su uso
Inventor: PAPADIMITRIOU APOLLON
IPC: A61K47/04
Filed: 1999-08-05
Abstract: Composición farmacéutica de administración oral que contiene un inhibidor de lipasas gastrointestinales, uno (o más) compuesto (s) adicional (es) del grupo consistente en quitosán, sus derivados y sales de los mismos, y exipientes auxiliares.
Patent FI-20010976-A (FI)
Inventor: KOSKIMAEKI ANTTI
IPC: B25D9/26
Filed: 2001-05-09
Abstract: A method for controlling the operating cycle of an impact device, and an impact device. Percussion piston position is measured using a sensor (11) from which the measurement data is transmitted to a control unit (12) of the impact device, which in turn controls an electrically driven control valve (10). According to an embodiment, the electrically driven control valve directly controls the pressure medium flows on the working pressure surfaces of the percussion piston. According to another embodiment the impact device comprises a control slide (6) that is movable in a reciprocating manner, the position of the control slide determining the flows of the pressure medium onto the working pressure surfaces of the percussion piston. The electrically driven control valve thus guides the control slide by supplying pressure medium to the working pressure surfaces (6a, 6b) of the control slide.
Patent FI-20030683-A (FI)
Inventor: HAAPIAINEN JENNI
IPC: A23L33/22
Filed: 2003-05-07
Abstract: The invention relates to a method for improving the solubility of non-starch polysaccharides of a vegetable material. The products prepared by the method and the use of the products are also included in the scope of the invention. The method comprises crushing of the material by mechanical energy to form particles, with at least a major portion of the cells containing non-starch polysaccharides in the material being damaged. Preferably, the non-starch polysaccharides end up in particles as produced by crushing to form particles smaller than that of the initial cell containing these polysaccharides in the material. Disruption of the cells allows effective interaction between the dissolving medium and the polysaccharides to be dissolved, appearing as increased solubility. The material crushing can be performed under the joint effect of pressure, heat and shearing forces. Preferred embodiments include extrusion, expansion and homogenisation under pressure, preferred materials for these treatments comprising oat, rye and fractions of these. The solubility and dissolution circumstances of the product of the invention can be adjusted by mixing the material to be crushed with an ingredient rich in amylopectin.
Patent FI-20031642-A (FI)
Inventor: WILLFOER STEFAN
IPC: C09K15/34
Filed: 2003-11-12
Abstract: The present invention concerns the use of i) finely divided knotwood; or ii) an extract, obtained by extracting knotwood with a polar solvent and recovering the extract, as an antioxidative agent. Furthermore, the invention also relates to the use of a fraction of said extract as an antioxidative agent.
Patent GB-1027532-A (GB)
Abstract: 1,027,532. Ignition systems. ROBERT BOSCH G.m.b.H. March 6, 1963 [March 10, 1962], No. 8920/63. Heading F1B. An ignition system has a first circuit including a primary winding 12 or 30 of an ignition transformer and a capacitor 21 for storing electrical energy, a second circuit with a winding 11 or 32 for storing magnetic energy and control means 16, 23 in each of these two circuits whereby at the instant of ignition the capacitor and the latter winding release the energy stored therein to the sparking plug located in the transformer secondary circuit As shown in Fig. 4 the transformer has two primary windings, 11, 12 associated with the secondary winding 10. A transformer with a tapped primary may be employed. In Fig. 5 there are two separate transformers 30, 31 and 32, 33. It is stated the mechanical contact breakers and discharge switches may be replaced by electronic switches. It may be of advantage to switch one or the other of the two primary circuits at choice or automatically according to operation conditions of the engine (e.g. by coupling with the carburettor throttle, by the vacuum in the intake or as a function of engine speed). The two circuits need not operate simultaneously.
Patent GB-1095487-A (GB)
IPC: E21B4/00
Abstract: 1,095,487. Boring earth &c. GEBR. BOHLER & CO. A.G. April 20, 1965 [April 17, 1964; Nov. 5, 1964], No. 16630/65. Heading E1F. A drill pipe is modified to add lubricant to the air supply of a "down-the-hole" pneumatic drill. A minor part of the air supply passes to a space 31 to move a piston 30 to force lubricant from a storage space 32 through a radial passage (43) to join the main air supply passing through an annular spacer 38 to the drill (not shown).
Patent GB-1226080-A (GB)
IPC: A45C15/04
Filed: 1968-09-18
Abstract: 1,226,080. Semi-conductor devices. NORTH AMERICAN ROCKWELL CORP. 18 Sept., 1968 [28 Nov., 1967], No. 38054/70. Divided out of 1,224,335. Heading H1K. An FET comprises a semi-conductor island on a single crystal insulating substrate and has N-type source and drain regions and a P-type isolation region extending through the entire thickness of the island. The channel of the FET is constituted by the P-type isolation region and an N-type region of lower impurity concentration than the source and drain which in operation forms a higher resistivity extension of the drain region. As shown, an N-type island 64 is formed on a sapphire substrate 62, a P<SP>+</SP> type isolation region 72 is formed by diffusion through the source region opening in a mask before formation of the N<SP>+</SP> type source and drain regions 66 and 68. A gate electrode 74 is applied on top of an insulating layer 76. The P<SP>+</SP> type region 72 is said to constitute the effective part of the channel.
Patent GB-1226202-A (GB)
IPC: C07D213/74
Filed: 1968-03-18
Abstract: 1,226,202. Substituted guanyl - formamidines. EGYESULT GYOGYSZERES TAPSZERGYAR. 18 March, 1968 [8 April, 1967], No. 12930/68. Heading C2C. Novel substituted guanyl - formamidines of the formula wherein A is a cyano, carboethoxy, an unsubstituted aryl, or aralkyl, an aryl or aralkyl substituted by a halogen atom or two halogen atoms which may be the same or different, C 1-6  alkyl, C 1-6  alkoxy, trihaloalkyl, nitro, naphthyl, tetrahydronaphthyl, pyridyl or-a pyridyl substituted by one or more halogen atoms, C 1-6  alkyl or nitro; and B is H, unsubstituted aryl or aryl substituted by a halogen atom, nitro, C 1-6  alkyl, trihaloalkyl or hydroxy, provided that, when A is cyano B is not hydrogen and pharmaceutically acceptable acid addition salts thereof are prepared by one of the following methods (a) Reacting a formimino ether of the Formula I where R is C 1-6  alkyl, with a guanidine of the Formula II (b) Reacting a formamidine of the Formula III with an o - alkyl - isourea or with a s - alkylisothiourea of the Formula IV where X is O or S. (c) Reacting an N-substituted cyanide of the Formula V with a formidine of Formula III above. (d) Reacting on N-substituted azomethinylo - alkyl - isourea or s - alkyl - isothiourea of the Formula VI with an amine of the Formula VII (e) Reacting a nitroso - guanyl - formamidine of the Formula VIII with an amine of Formula VII above. (f) Reacting an N<SP>1</SP> - substituted - N - nitrosoguanidine of the Formula IX with a formamidine of Formula III above. (g) Reacting on N<SP>1</SP> - substituted N-formylguanidine of the Formula X with an amine of the Formula XI Therapeutic compositions suitable for oral or parenteral administration, contain at least one of the above novel compounds or pharmaceutically acceptable acid addition salts thereof in combination with solid or liquid pharmaceutical carriers. The compositions have virostatic and hypotensive acitvity and are also effective against bacteria and fungi.
Patent GB-1228596-A (GB)
IPC: A61K31/19
Filed: 1968-05-07
Abstract: 1,228,596. N-alkylacylamino triiodophenylalkane acids. BRACCO INDUSTRIA CHIMICA S.p.A. 7 May, 1968 [29 May, 1967], No. 21574/68. Heading C2C. The invention comprises compounds of the Formula I in which alkyl represents a lower alkyl C 1-3  radical, R represents a lower alkyl C 1-4  radical and acyl represents a lower aliphatic acyl C 2-4  radical derived from a carboxylic acid, their non-toxic metal or amine salts or alkyl esters thereof. They are prepared by N-alkylating the corresponding unsubstituted acylamino compound in an alkaline medium with an alkyl ester of a strong acid, and subsequently esterifying the acid of Formula I, if desired. a - (3 - Acetylamino - 2,4,6 - triiodophenyl)- alkane acid is prepared by reacting acetic anhydride with α-(3-amino-2,4,6-triiodophenyl)- alkane acid which is prepared by reacting potassium iodo dichloride with α-(3-amino phenyl)- alkane acid which is prepared by the reduction of the corresponding nitro compound using hydrogen and Raney nickel. α - 3 - Nitrophenyl alkane acid is prepared by the hydrolysis of α-(3-nitro phenyl) alkane nitrite which is prepared by reacting the corresponding bromo compound with potassium cyanide. The alkane acids are the propionic, butyric and valeric acids. The compounds of Formula I together with pharmaceutically acceptable carriers are used as X-ray contrast agents and are administered orally or parenterally as cholecystographic agents.
Patent GB-1230667-A (GB)
IPC: F23D11/24
Filed: 1969-03-31
Abstract: 1,230,667. Spray producers. MOTORENUND TURBINEN-UNION MUNCHEN G.m.b.H. 31 March, 1969 [29 March, 1968], No. 16843/69. Heading B2F. [Also in Division F4] A fluid spray nozzle comprises a hollow atomizer head 2 and a valve piston 4 axially movable in a casing 1 under fluid pressure on a face 13 of the piston against the action of a spring 8, the atomizer head having at least one tapered elongate outlet port 10 with a closed periphery, and a part of the valve piston 4 moving to reduce or increase the effective size of the port 10 on a change in the pressure of fluid entering through an inlet 11. The ports 10 may be of slender isosceles triangular shape, and an adjusting screw 6 may be provided to preset the pressure at which the ports 10 are closed. The nozzle may be used for spraying fuel into a gas turbine combustion chamber.
Patent GB-1231162-A (GB)
IPC: B41C1/14
Filed: 1969-02-27
Abstract: 1,231,162. Stencils. ELITEX-ZAVODY TEXTILNIHO STROJIRENSTVI GENERALNI REDITELSTVI. 27 Feb., 1969 [29 Feb., 1968], No. 10437/69. Heading B6C. A cylindrical screen-printing stencil comprises a metal fabric having a warp constituted by triads 1 of warp wires, the triads being regularly spaced over the width of the fabric in a triangular configuration as shown, the vertex wire being situated alternately above and below a weft wire 2. The fabric is seamlessly joined to form the cylindrical stencil which is provided at its ends with reinforcing flanges (Fig. 5, not shown), the whole being nickel plated.
Patent GB-1233999-A (GB)
IPC: G05D16/18
Filed: 1969-04-09
Abstract: 1,233,999. Headbox for paper making machines. A. AHLSTROM OSAKEYHTIO. 9 April, 1969 [9 April, 1968; 24 Sept., 1969], No. 18304/69. Heading D2A. [Also in Division G3] The volume of a paper-making machine headbox is automatically controlled in dependence on headbox pressure to maintain the latter constant. In Fig. I, signals corresponding to the pressure within a headbox 9 of a paper-making machine are developed at 6 and compared, e.g. electronically, at 7 with signals corresponding to a desired pressure so that any difference is effective to adjust a piston 8 by a pneumatic, hydraulic or electric servomotor 1 in such sense as to correct the pressure quickly by altering the effective volume of the air space. Signals corresponding to the position of piston 8 are developed at 2 and compared at 3 with signals corresponding to a desired position so that any difference is effective to control an air inlet valve 4a in such sense as to restore the piston 8 slowly to its desired position. The level of liquid in the headbox is automatically maintained .between limits by a detector 13 controlling a stock inlet valve 14. In a modification, the top of the headbox is flexibly attached to the walls and loaded by weights associated with a shock absorber and springs so that any tendency of the pressure to change in the headbox is quickly opposed by the change in volume resulting from the movement of the top of the headbox. Signals responsive to the position of the top slowly restore the top to a desired position by automatically controlling the air inlet valve or, where there is no air space, the stock inlet valve. Instead of weights, an automatically controlled constant force may be applied to the top of the headbox. Arrangements which maintain a constant subatmospheric pressure and arrangements which use an expansible bellows within the air space to control its volume are referred to.
Patent GB-1234362-A (GB)
IPC: B23K35/00
Filed: 1969-02-13
Abstract: 1,234,362. Brazing; making tube spacers. CANADIAN WESTINGHOUSE CO. Ltd. 13 Feb., 1969 [15 Feb., 1968], No. 7844/69. Headings B3A and B3R. [Also in Division G6] A spacer element (Fig. 5) for brazing to zirconium alloy, e.g. zircaloy, tube 10 (Fig. 4) comprises a zirconium alloy pellet 11 having sidewalls substantially perpendicular to its face which is to be brazed to the tube and a layer 14, 15 of beryllium on at least a portion of the sidewalls. A plurality of such elements are made by cropping a zirconium alloy wire into pieces, coining the pieces to provide a plurality of elements 11 each having sidewalls, a face curved to correspond to the curvature of the tube 10, a protrusion 16 near the centre of said face and a channel 17, 18 extending from the protrusion to the sidewalls, stacking the elements with their sidewalls exposed and vacuum depositing on the sidewalls of each a quantity of beryllium 14, 15 sufficient to combine, when heated, with zirconium alloy from the element to form a brazing alloy capable of joining the element to the tube. The lower edges of the element may be chamfered (Fig. 5) to aid the flow of the alloyed beryllium during brazing. In a method of brazing the element 11 to the tube 10, the element is first tack welded to the tube by spot welding at the protrusion 16 and then heating the assembly in vacuo to 1030 C. to permit the alloyed beryllium to flow by capillary action into the space between the element and the tube. The channel 17, 18 is said to assist in guiding the alloy to the centre of the joint and in ensuring an even distribution of the alloy. In vacuum depositing the beryllium on the spacers the latter may be arranged radially about a common centre at which beryllium is vaporized. The tube with spacers attached may form part of anuclear fuel element.