baber/WOPTO huggingface dataset:
Patent EP-4258311-A1 (EP)
Title: Arc extinguishing structure and dual power changeover switch
Inventor: WANG HAN
IPC: H01H9/34
Filed: 2023-03-29
Abstract: The invention relates to an arc extinguishing structure and a dual power changeover switch with the arc extinguishing structure. The arc extinguishing structure includes an arc extinguishing chamber (10) and an arc extinguishing shell (20). The arc extinguishing chamber (10) comprises a plurality of arc extinguishing grids (11) separated from each other and arranged as a first arc extinguishing grid group (A) and a second arc extinguishing grid group (B) that is separated from the first arc extinguishing grid group (A) by an arc extinguishing chamber gap (17). The arc extinguishing shell (20) is used for accommodate the arc extinguishing chamber (10) and provided with an arc jetting opening (26) that is aligned with the arc extinguishing chamber gap (17). The arc extinguishing structure is provided with an arc travelling channel (L) communicated with the arc jetting opening (26) and having a bent structure.
Patent EP-0001019-A1 (EP)
Inventor: HOLAN GEORGE
IPC: C07C251/76
Filed: 1978-08-29
Abstract: Compounds of the general formula
     wherein R 1 , R 2 , R'. R 4  and R 5  are each independently H, Cl, Br. NO 2  or CF 3 ; X = H or Br; and Z is H, CH 3  or CF 3 . 
     The compounds are all potent inhibitors of oxidative phosphorylation in rat liver mitochondria and have other biological activity, for example, insecticidal activity. 
     The compounds are made (A) where X = H and Z = CF 3 . by reacting the appropriately substituted phenylhydrazine with hexafluoroacetone in a basic organic solvent in the presence of an acidic dehydrating agent; (b) where X  =  H and Z is H or CH 3  by reaction of the phenylhydrazine with 1,1,1-trifluoroacetone or trifluoroacetaldehyde in a suitable solvent in the presence of an acid catalyst: (c) where X = Br can be made from the corresponding compound where X = H by direct bromination. 
     The invention includes insecticidal compositions containing the compounds.
Patent EP-0003588-A1 (EP)
Inventor: MAAS MICHAEL
IPC: H03G3/34
Filed: 1979-02-05
Abstract: Die Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zur Unterdrückung von Störsignalen in einem Nutzsignal, wobei die Störsignale als Gemisch aus schmalen Störimpulsspitzen (P) hoher Amplitude und Störbrumm (UN) anfallen können. Wünschenswert ist, daß ohne gegenseitige Beeinflussung solche Störspitzen und Störbrumm in einem Nutzsignal (U1) unterdrückt werden. Gemäß der Erfindung wird hierzu ein anfallendes Nutzsignal mit möglicherweise überlagerten Störsignalen (UN und/oder P) einem Störbrummfilter (B1) zugeführt. Die ausgefilterte Störbrummkomponente wird dem Ursprungs-signal zur Kompensation des Störbrumms gegensinnig überlagert. Dies gilt nur so lange, wie von einer Erkennungseinrichtung (B2) Störimpulsspitzen (P) nicht erkannt werden. Wird eine solche erkannt, so wird das Filter vom Eingangssignal ab- und auf Eigenschwingbetrieb umgeschaltet. Hierdurch wird eine künstliche Schwingung mit Amplitude und Frequenz der vorhergehend selektierten Störbrummkomponente ohne Phasensprung erzeugt und dem Nutzsignal überlagert. Die Störimpulsspitze wird gleichzeitig ausgetastet. Die Erfindung ist speziell bei der Elektrokardiogramm-Verarbeitung zur Unterdrückung von Schrittmacherimpulsen und Netzbrumm einsetzbar.
Patent EP-0007403-A1 (EP)
Inventor: ALEXANDER JOSE
IPC: C07C49/637
Filed: 1979-06-05
Abstract: A process for synthesizing the 7-substituted or unsubstituted 5,12-dihydroxy- 1,2,3,4,6,11-hexahydro- 2,6,11- trioxonaphthacene precursors for doxorubicin and related compounds from butadiene and p-benzoquinone and intermediates useful in the synthesis.
Patent EP-0013678-A1 (EP)
Inventor: SEDY JOSEF
IPC: F16J15/34
Filed: 1979-06-08
Abstract: The seal having a primary sealing ring (20) and a mating sealing ring (26) with opposed radially extending sealing faces (22-24), one of said rings (26) having:
 a) Spiral grooves (70) extending inwardly from the outside diameter of the face of one of said rings (26), said grooves (70) having a depth of between approximately. 0.0025 and 0,0075 mm, said grooves (70) extending across the face (24) of said ring (26) to provide a dam width ratio of between approximately .5 and .8 according to the formula 
<MATH>
 where GD is the diameter of a circle defined by the boundary of the grooved area and the ungrooved area in said face, ID is the internal diameter of the sealing interface and OD is the outside diameter of the sealing interface; and
 b) Said ring has a balance of between .8 and .9 according to the formula 
<MATH>
 where OD is the outside diameter of the sealing interface, ID is the internal diameter and BD is the balance diameter.
Patent EP-0003170-A1 (EP)
Inventor: PLINT MICHAEL ALEXANDER
IPC: G01F23/00
Filed: 1979-01-09
Abstract: (D In an apparatus for measuring the gravimetric fuel consumption of a liquid fuel burning engine, in order to avoid having to weigh a vessel from which fuel is withdrawn as it is consumed, a body (18) of higher density than the fuel is suspended from a weighing device (20) in a vessel (10) so as to be partly immersed in the fuel, the cross-sectional areas of the vessel (10) and the body (18) in horizontal planes bearing a precise and known relationship to one another, so that the weighing device (20) measures the weight of fuel withdrawn from the vessel (10) in terms of the gain in the apparent weight of the body (18) which results from the reduction in its immersed volume. Preferably the weighing device (20) is of the electronic type, permitting little or no downward movement of the body (18) to take place, and providing a digital read-out. Further means may be provided to measure the time of operation, the number of revolutions of the engine, and the average dynamometer torque exerted during a test.
Patent EP-0003889-A1 (EP)
Title: Disc brake caliper assembly
Inventor: YAMAMOTO MASACHIKA
IPC: F16D/
Filed: 1979-02-15
Abstract: A metal protector (10) for a disc brake piston boot attached to a pad backing plate. The protector has a main surface area (11) substantially equal in outline to the pad backing plate. Flanges (12, 13) are used to attach the protector to the backing plate. The protector may be coated with a lubricant or acoustic damping material to assist In minimising squeal and chatter.
Patent EP-0008559-A1 (EP)
Inventor: PROVOST PHILIP J
IPC: C12N7/08
Filed: 1979-08-17
Abstract: Hepatitis A virus is passaged at least once in a susceptible sub-human primate; the infected liver from such passage is used to inoculate an in vitro cell culture, the inoculated cell culture is incubated until hepatitis A antigen is detected in the cell sheet or culture fluid, and at least two serial in vitro passages in cell culture are carried out. The hepatitis A virus so modified can be used to prepare live, attenuated hepatitis A vaccine or an inactivated hepatitis A vaccine.
Patent EP-0016181-A1 (EP)
Title: Reglage de frein comprenant un anneau d'etirage
Inventor: CROSSMAN RICHARD L
IPC: F16D65/54
Filed: 1980-03-25
Abstract: L'invention se rapporte a la technique des systemes de freinage, specialement pour l'utilisation dans les avions, laquelle a pour objet de minimiser le probleme des forces de friction inherentes aux types conventionnels de reglage de frein. Afin de minimiser ce probleme des forces de friction, il est prevu un reglage de frein (10) dans lequel une tige massive (30) ou cannelee (44) est rattachee entre le mecanisme de retour (20) et la plaque de pression (12) du reglage de frein (10). La tige (30; 44) passe au travers d'un anneau d'etirage (26) d'un diametre legerement moins grand que le plus grand diametre de la tige (30; 44). La tige (30; 44) est tiree au travers de l'anneau d'etirage par la force impartie par la plaque de pression (12) lors de d'usure du frein, cet anneau d'etirage (26) emboutissant et reformant la tige (30;44) pendant que cette tige (30; 44) s'allonge pour compenser l'usure due au freinage.
Patent EP-0019131-A1 (EP)
Inventor: KRAMER WOLFGANG DR
IPC: C07D249/08
Filed: 1980-04-28
Abstract: Die Erfindung betrifft neue fluorierte 1-Triazolyl-butan-Derivate, ein Verfahren zu ihrer Herstellung und ihre Verwendung als Fungizide. Die neuen Verbindungen der allgemeinen Formel <IMAGE> in welcher Az, B, X, Z und n die in der Beschreibung angegebene Bedeutung besitzen, werden erhalten, wenn man Halogenetherketone mit 1,2,4-Triazol in Gegenwart eines Säurebindemittels und gegebenenfalls in Gegenwart eines Verdünnungsmittels umsetzt und gegebenenfalls noch die erhaltenen Keto-Derivate nach bekannten Methoden in üblicher Weise reduziert. Die Wirkstoffe sind für den Gebrauch als Pflanzenschutzmittel geeignet und können mit besonders gutem Erfolg zur Bekämpfung des Gurkenmehltaus (Erysiphe cichoracearum) sowie gegen Getreidekrankheiten, wie gegen Getreidemehltau, Getreiderost und Gerstenmehltau eingesetzt werden.
Patent EP-0047791-A1 (EP)
Inventor: HINTSCH OTTO DR
IPC: D03C1/14
Filed: 1980-09-12
Abstract: Die Kupplungsanordnung enthält einen Hubteil (31 bis 33), der zwei Hebel (41,42) und eine diese verbindende Feder (37) trägt. Der Hubteil (31 bis 33) wird von einem Hebel (48) angetrieben, der zwischen die beiden Hebel (41,42) eingreift. Von dem Hubteil (31 bis 33) ist einerseits die Platine (23) für die Steuerhebel (14 bis 17) angetrieben, andererseits wird der Abtastarm (33) gegen den Anker (53) eines Elektromagneten (51) bewegt. Beide Bewegungen erfolgen unter Ausnutzung des durch die einzige Feder (27) gegebenen Kraftschlusses. Hierdurch werden die Teile besonders geschont. Zugleich wird erreicht, dass mit besonders wenigen Teilen auszukommen ist.
Patent EP-0025623-A1 (EP)
Inventor: VAN DER LELY CORNELIS
IPC: A01B13/00
Filed: 1980-09-05
Abstract: A plough comprising a frame that is provided with means (52) for attaching the plough to a three point hitch of a tractor and comprises at least two power driven turning devices (31) for turning furrow slices. 
<??>The two power driven turning devices (31) are arranged in the frame in such a way that they are working adjoining strips of ground and are postioned so that in side view they are in, or are almost in overlapping relation to each other. 
<??>The power driven turning devices (31) are turning the furrow slices during operation mainly about their longitudinal axis and are delivering said furrow slices at the rear of the devices onto the ground.
Patent EP-0031174-A1 (EP)
Inventor: ENDRES WILHELM DR DIPL-ING
IPC: F01D9/02
Filed: 1980-12-01
Abstract: Zur Verbesserung der Wandkühlung, insbesondere bei Gasturbinenelementen, wie Schaufeln, Brennkammern, Einlaufkanälen usw. wird vorgeschlagen, dass zwischen einem Aussenblech (1) und einem Innenblech (2) eine Trennwand (4) angeordnet ist, durch welche ein Kühlmittelraum (3) und ein Druckausgleichsraum (7) gebildet wird. Die Trennwand (4) besteht vorzugsweise aus einem Buckelblech, dessen Buckel (5) mit dem Aussenblech (1) verschweisst sind. Im Druckausgleichsraum (7) wird ein Druck aufrechterhalten, welcher in etwa dem Heissgasdruck auf der Aussenoberfläche des Aussenbleches (1) entspricht, so dass Kesselspannungen vermieden werden.
Patent EP-0029007-A1 (EP)
Inventor: VON DER CRONE JOST DR
IPC: C09B57/04
Filed: 1980-11-03
Abstract: Isoindoline pigments of the formula <IMAGE> where R is an alkyl radical of 1-4 carbon atoms which can be substituted by a hydroxyl, cyano, phenyl or carbamoyl group, an alkoxy group of 1-4 carbon atoms, an aryloxy, aryloxycarbonyl, aroyloxy or aroylamino group, an alkoxycarbonyl, alkanoyloxy, alkylcarbamoyl or alkanoylamino group of 2-6 carbon atoms or a phthalimido group, or is a cycloalkyl group of 5-8 carbon atoms, and X is a radical of the formula <IMAGE> where Y and Z are each H or halogen, alkyl or alkoxy of 1-4 carbon atoms. These pigments are suitable for colouring high molecular weight organic compounds and are notable for the cleanness of hue and good light, weathering, migration, overlacquering and solvent fastness and heat resistance.
Patent EP-0036160-A1 (EP)
Inventor: HORNER MICHAEL DR
IPC: C07D311/58
Filed: 1981-03-09
Abstract: Herstellung von 2-Hydroxyalkylchromanen (I) <IMAGE> (R¹ bis R<4> = H; C1-C8-Alkyl; R' = H; hydrolytisch oder hydrogenolytisch als R'-OH oder R'-COOH abspaltbarer organischer Rest; m = 1, 2 oder3) indem man ein Hydrochinon II <IMAGE> a) mit einem Alkendiol IIIa <IMAGE> oder b) mit einem Alkendiol IIIb <IMAGE> oder c) mit einem Alkendiol IIIc <IMAGE> wobei R<4>' ein Rest ist, der bei der Kondensation mit II in den Rest R<4> übergeht bei (-50) bis 120°C in Gegenwart von 10 bis 300 mol %, bezogen auf die Menge von II, einer Lewissäure oder eines Adduktes aus einer Lewissäure mit einer Lewisbase, deren Basizität geringer ist als die der Verbindung II, in einem inerten Lösungsmittel umsetzt.
Patent EP-0042929-A1 (EP)
Inventor: SMILGES ROBERT
IPC: F15B13/01
Filed: 1981-04-27
Abstract: A counterbalance valve for controlling the flow of fluid from a hydraulic motor when a load is lowered has a pilot operated valve which modulates the flow of pressure fluid to and from a control port connected to main valve poppet to thereby set the opening of the poppet.
Patent EP-0040416-A1 (EP)
Inventor: LEIST HELMUT DIPL-ING
IPC: G05D23/24
Filed: 1981-05-15
Abstract: Für beheizte physiologische Meßwertaufnehmer beispielsweise für transkutane pO2-Sensoren, deren Heizleistungsaufnahme durch einen eingebauten Temperaturfühler und eine thermostatische Regeleinrichtung innerhalb eines vorgegebenen Temperaturbereichs von beispielsweise 37°C bis 45°C gehalten wird, sieht die Erfindung eine Sicherheitsmaßnahme vor, die eine Überhitzung des Meßwertaufnehmers und/oder der Meßstelle bei Ausfall der thermostatischen Regeleinrichtung und/oder bei Bruch einer für die Temperaturüberwachung vorgesehenen Leitungsader sicher verhindert. Diese Sicherheitsmaßnahme besteht in einem zusätzlichen vorzugsweise elektronischen Schalter (34), der vorzugsweise von dem für das Heizelement (22) im Meßwertaufnehmer (19) bestimmten Versorgungsleitungspaar gespeist wird und die Stromzufuhr zum Heizelement (22) unterbricht oder kurzschließt, sobald ein ebenfalls in den Meßwertaufnehmer eingebauter Temperaturfühler (24) das Überschreiten einer vorgebbaren Schwellentemperatur feststellt.
Patent EP-0047426-A1 (EP)
Inventor: KOLB WALTER
IPC: A01G9/26
Filed: 1981-08-25
Abstract: In a forcing frame for growing seeds, a heating plate (10) which can be connected to a low-voltage source and has an electrical heating resistor (12) is provided which has through-holes. <IMAGE>
Patent EP-0048499-A1 (EP)
Inventor: RUT TADEUSZ
IPC: B21K1/08
Filed: 1979-01-12
Abstract: Die Vorrichtung zum Stauchen auf Pressen weist die folgenden Merkmale auf: Zwei geteilte, aus Matrizenhälften (20, 21) zusammengesetzte Matrizen, welche das zu stauchende Material klemmen, sind in Matrizen-haltern (7, 18) zwischen dem Kopfstück (16) und dem Untergestell (1) angeordnet. Die Matrizenhalter (7, 18) sind quer zur Richtung des Presseströßelhubes beweglich gelagert. Die Halter (7) der Matrizenhälften (20) welche sich auf einer Seite der Matrizenteilungsebene (P) befinden sind an Gelenkhebeln (5 und 11) angelenkt, welche ihrerseits am Gestell (1) gelagert sind. Die Halter (18) der anderen Matrizenhälften (21) welche sich auf der anderen Seite der Matrizenteilungsebene (P) befinden, werden mittels Mitnehmern (18a) an die Halter (7) gekoppelt. Die unteren Lagerungen der Gelenkhebel(5), welche naher an der Stauchzone angeordnet sind, stützen sich an Querbalken (3), welche am unteren Teil der das Untergestell bildenden Balken (1) befestigt sind. Die oberen Lagerungen dieser Gelenkhebel (5) sind an den Matrizenhaltern (7) unterhalb der Matrizenteilungsebene (P) angeordnet Die unteren Lagerungen der Gelenkhebel (11), welche weiter von der Stauchzone entfernt sind, sind im oberen Teil des Balkens (1) abgestützt und die oberen Lagerungen dieser Gelenkhebel (11) sind an den Matrizenhaltern (7) oberhalb der Matrizenteilungsebene (P) angeordnet.
Patent EP-0052808-A1 (EP)
Inventor: LEFRANCOIS PHILIP ANDREW
IPC: C01B33/04
Filed: 1981-10-30
Abstract: A silicon halide such as silicon tetrafluoride is reacted with an agitated slurry of an alkali metal hydride such as sodium hydride in a liquid which includes a diaryl ether such as diphenyl ether. At elevated temperatures such as 250-260°C, complete conversion of the silicon halide to silane is observed, even with contact times under two seconds.
Patent EP-0053783-A1 (EP)
Inventor: TOHATA TORU
IPC: B60J5/10
Filed: 1981-11-30
Abstract: In a hatchback type motor vehicle having a hatchback door (14) which is swingable relative to the vehicle body to open and close a door opening (16) defined in the rear panel construction (18) of the vehicle, there is proposed a rear lamp construction which comprises a first device (A) mounted in the rear panel construction for producing light which is directed toward the door opening, and a second device (B) mounted in the hatchback door for, when the door is in its closed position, reflecting the light coming from the first device toward the back of the vehicle.
Patent EP-0055497-A1 (EP)
Inventor: LIEDER CHARLES ARTHUR
IPC: B01D53/14
Filed: 1981-11-19
Abstract: Hydrogen sulphide and carbonyl sulphide are removed from a gaseous mixture in a staged procedure, characterized by conversion of the hydrogen sulphide to produce sulphur in aqueous solution, hydrolysis of the carbonyl sulphide remaining in the gaseous mixture to produce hydrogen sulphide and carbon dioxide, and removal of the hydrogen sulphide from the gas stream.
Patent EP-0046370-A1 (EP)
Inventor: ZHENG YEA KOA
IPC: F03D7/06
Filed: 1981-08-13
Abstract: A vertical axis windmill has each blade (1) freely pivotally connected to a rotatable support structure on an axis (8-8) passing through its centre of gravity (C.G.) which is arranged to lie forward of its aerodynamic centre (C.P.) whereby the blade automatically swings outwardly and inwardly when moving upstream and downstream of the axis of rotation of said support means respectively.
Patent EP-0048147-A1 (EP)
Inventor: PITHOUSE KENNETH BRIAN
IPC: H02G15/18
Filed: 1981-09-11
Abstract: A wrap-around device for enclosing at least part of an elongate substrate such as a pipe comprises a dimensionally-recoverable cover, preferably a dimensionally heat-recoverable cover (2) having an adhesive closure arrangement comprising two closure portions (3, 4) which can be brought into abutment to form an adhesive bond but which, when pulled in a direction away from each other after the adhesive bond has been formed, will change in configuration to form a lap joint. 
     The device according to the invention enables an adhesive wrap-around device to be installed about a substrate in a simple manner without the possibility of misalignment of the closure portions.
Patent EP-0052946-A1 (EP)
Inventor: HENMAN TERENCE JOHN
IPC: C12P7/62
Filed: 1981-10-26
Abstract: Microbiologically produced polymers based on β-hydroxybutyric acid of improved melt stability containing a polyethylenically unsaturated compound containing at least two reactive groups of the formula -CH=CR 1 - in which R, is hydrogen, a lower alkyl or a phenyl radical and in which compound R 1  may differ from one -CH=CR,- group to another with the proviso that where the compound contains only two groups of the formula -CH=CR 1 -, they are not both contained in:
     groups where R is hydrogen, a lower alkyl, or a phenyl radical. The polyethylenically unsaturated compounds are most effective when used in the presence of free radical generating agents, although thermal and shear induced activation may be employed. Preferred ethylenically unsaturated compounds contain at least two allyl compounds, at least two maleimido groups or at least three groups of formula:
Patent EP-0063768-A1 (EP)
Inventor: SCHULER RALF DR
IPC: C08L27/06
Filed: 1982-04-17
Abstract: A polyvinyl chloride blend contains, as a smoke-reducing additive, a copper (II) hydroxide phosphate of the composition Cu3(PO4)2.Cu(OH)2 in amounts from about 0.1 to 20 parts by weight per 100 parts by weight of polyvinyl chloride. The thus-treated polyvinyl chloride is not discolored by the addition of this copper compound a significant advantage when compared to conventional copper compound additives.
Patent EP-0067411-A1 (EP)
Inventor: SAKAMOTO FUMIO
IPC: A61P31/04
Filed: 1982-06-08
Abstract: A novel quinolinecarboxylic acid derivative of the formula   <IMAGE> (I)  or a pharmaceutically acceptable salt thereof. These compounds are useful as antibacterial agents, and are prepared by a process which comprises reacting a compound of the formula   <IMAGE> (II) with a compound of the formula   <IMAGE> (III)  wherein X represents a halogen atom, and thereafter, as required, converting the resulting compound to a pharmaceutically acceptable salt thereof.
Patent EP-0071997-A1 (EP)
Inventor: KOMATSU MICHIYASU
IPC: C04B35/597
Filed: 1982-08-06
Abstract: There are disclosed a sintered body of ceramics, comprising 0.1 to 10% by weight of Y 2 O 3 ; 0.1 to 10% by weight of Aℓ 2 O 3 ; 0.1 to 10% by weight of AℓN; 0.1 to 5% by weight of at least one oxide selected from the group consisting of Li,O. BeO, CaO, V 2 O 5 , MnO 2 , MoO 3  and WO 3  or a combination of at least one of these oxides with at least one oxide selected from the group consisting of B 2 O 3 , MgO, TiO 2 , Cr 2 O 3 , CoO. NiO, ZrO 2 , Nb 2 O 5 , HfO 2  and Ta 2 O 5 ; and the balance of Si 2 N 4 , and a process for producing a sintered body of ceramics, which comprised molding a powder mixture of the same composition, and sintering the resultant molded compact in a non-oxidative atmosphere. 
     The process of the present invention requires no hot press and therefore is very suitable for bulk production.
Patent EP-0072055-A1 (EP)
Inventor: DRENT EIT
IPC: C07C67/00
Filed: 1982-07-09
Abstract: Process for the co-production of carboxylic acids of the general formula R'-COOH and R 2 -COOH and carboxylic acid esters of general formula R 1 -COOCH 2 R 2  and R 2 -COOCH 2 R 1  from carboxylic acid esters of general formula R 1 -COOR 2  an/or ethers of general formula R 3 0R 4  (R 1 , R 2 , R 3  R 4  representing (substituted) alkyl or (substituted) aryl, alkaryl or aralkyl, R' also representing H), carbon monoxide and hydrogen at elevated temperature and pressure in the presence of a ruthenium compound and a further Group VIII metal compound, hydrogen iodide, hydrogen bromide, elemental iodine and/or elemental bromine being added to the reaction mixture. The process is of special interest for the selective conversion of methyl acetate into ethyl acetate and acetic acid at pressures well below 100 bar.
Patent EP-0076569-A1 (EP)
Inventor: JOHNSTON SAMUEL JAMES BLAIR
IPC: B29C43/32
Filed: 1982-09-02
Abstract: @ An electroplating arrangement having particular use in the manufacture of stamper plates for disc record production comprises a rectangular plating path (1), one side wall (2) being non-vertical with respect to the bath base (12). A filter screen (10) divides the bath into an anode region and a cathode region, the regions including anode and cathode electrode arrangements respectively (3, 7). 
     A stamper plate (not shown) to be plated is mounted on the cathode electrode arrangement which is connected to a motor (9) capable of rotating the arrangement about an axis perpendicular to the plate. The anode arrangement comprises an elongate porous bag (3) containing anode material (5) and is disposed parallel to the cathode arrangement and non-vertical wall. An electrolyte input pipe (13) extends through the bag and screen to lie opposite the mounted stamper plate directing inflowing electrolyte thereat. An output exit (11) is disposed within the anode region on the bath base such that the anode arrangement lies within the flowpath from said entrance to said exit.