baber/WOPTO huggingface dataset:
Patent YU-46809-B (YU)
Title: Talasni orbiter
Inventor: MILUN COJBASIC
IPC: A63B23/04
Filed: 1986-05-28
Abstract: TALASNI ORBITER, koja može da se koristi kao gimnastičko rekreativna sprava, naznačen time, što je tanjirasta ploča (1) povezana sa okruglim postoljem (2) preko mehanizma za nošenje, podizanje i spuštanje tanjiraste ploče (3, 4, 5). Prijava sadrži još 2 patentna zahteva.
Patent ZA-84787-B (ZA)
Title: Process and plant for the production of ammonium nitrate
Inventor: POUILLIART ROGER VICTOR
IPC: C01C1/18
Filed: 1984-02-02
Abstract: This invention relates to a process and an apparatus for the production of ammonium nitrate which produce an ammonium nitrate solution of a sufficient concentration, preferably from 90 to 98% by weight using nitric acid solutions of a relatively low concentration. The ammonium nitrate solution is concentrated in a multistage evaporation installation in which at least one evaporator is heated by the steam generated by a depressurization of the ammonium nitrate solution.
Patent AT-395652-B (AT)
Title: Heating system
IPC: G05D23/20
Filed: 1990-05-16
Granted: 1993-02-25
Abstract: Heating apparatus with a boiler 1 which is connected to a heater arrangement 9 by means of a forward-flow and return-flow line 2, 3, 7, 8 provided with a pump 10 and with a four-way mixing valve 7. In order largely to avoid operation at low boiler inlet temperatures, a boiler circuit pump 5 controlled by a control device 6 is provided. <IMAGE>
Patent AT-397780-B (AT)
IPC: B24D7/18
Filed: 1991-09-27
Granted: 1994-06-27
Abstract: An angle grinder (1) with a disc-shaped abrasive disc (6), having abrasive segments (10) arranged in an annular shape, and with a covering cap (4) for the abrasive disc (6). At least one suction pipe (2) for discharged material opens into the covering cap (4). The abrasive disc (6) is provided with holes (5) which describe a circle when the abrasive disc (6) rotates. The opening (3) of the suction pipe (2) and the holes (5) in the abrasive disc (6) are at least approximately of the same size. The opening (3) is located above the circle which is formed by the holes (5) of the abrasive disc (6) when the abrasive disc (6) rotates. <IMAGE>
Patent CH-625099-B (CH)
Inventor: PAOLINI JEAN
IPC: G04B37/08
Filed: 1979-02-14
Abstract: The watch case comprises a bezel (2) with cylindrical base (9) and a back/middle (1) to which are fixed the horns. The cylindrical base of the bezel is pushed into a cylindrical opening of the back/middle. It is fixed with screws (3) provided, immediately beneath the screw head, with a groove in which an O-ring (7) is placed. The groove is bounded, on the side opposite the screw head, by a rim (10). The cylindrical base (9) has an analogous groove (5) provided with an O-ring (6). The two rings experience only the lateral pressure of the walls of the back/middle. <IMAGE>
Patent CH-624529-B (CH)
Inventor: BANNIKOV VLADIMIR STEPANOVICH
IPC: G02F1/1335
Filed: 1978-03-08
Abstract: The moulds for homogeneous alignment of the liquid crystal and for the polarisation filters are produced simultaneously. To this end, a gel (3) of a dichroic dye having a concentration of from 1 to 30 % by weight is applied to the surface of plates (1) intended for contact with the liquid crystal. The gel (3) is then subjected to mechanical treatment to produce a film (4) from the gel (3), a speed gradient of from 10<2> to 10<7> s<-1> being maintained according to the thickness of the film to be produced, after which the solvent is removed from the film (4). The process is preferably intended for the production of liquid-crystal cells for watches and pocket calculators. <IMAGE>
Patent FI-60865-B (FI)
Inventor: STUETZ PETER
IPC: A61K31/48
Filed: 1975-03-06
Granted: 1981-12-31
Abstract: 1497681 6 - Methyl - 8 - mercaptomethylergolenes and ergolines SANDOZ Ltd 10 March 1975 [14 March 1974 23 July 1974] 9807/75 Heading C2 [Also in Division A5] Novel compounds of the Formula I wherein # is the group -CH = CH or and R is hydrogen; cyano; a 5- or 6-membered unsaturated heterocyclic radical attached through a ring carbon atom and having 1 to 3 heteroatoms, the first hetero atom being introgen, oxygen-or sulphur-and the second and third heteroatoms, if present, being nitrogen; or a 2- or 4-pyridyl monosubstituted by C 1-4  alkyl or alkoxy or chlorine, fluorine or bromine, with the proviso that when # is -CH=C< and the side chain in the 8 position has the #- configuration then R is other than 2-pyridyl, and acid addition salts thereof, may be prepared by reacting a compound of Formula II wherein X is a radical capable of being displaced by a thio group with a compound of the formula M5R wherein M is hydrogen or alkali metal or by reducing the -SCN group in a compound of the Formula I in which R is CN to -5N. 6 - Methyl - 8α - methanesulphonyloxymethyl ergoline-I is prepared by acrylation of 9,10- dihydro-isolysergol I with methane sulphonyl chloride. The compound I excluded by the proviso is the subject of Divisional Specification 1,497,682.
Patent FI-66015-B (FI)
Inventor: HERTEL OTTO
IPC: D21H17/55
Filed: 1980-08-19
Granted: 1984-04-30
Abstract: Process for the production of water-soluble auxiliaries for the papermaking industry by reacting (a) 1 part by weight of a polyamidoamine obtained by condensing 1 mole of a dicarboxylic acid having from 4 to 10 carbon atoms with from 0.8 to 1.4 moles of a polyalkylene polyamine having from 3 to 10 alkyleneamine units and containing up to 8 ethyleneimine units per basic nitrogen atom with (b) 0.1 to 4 parts by weight of an  alpha , omega -dichloro polyalkylene oxide obtained by reacting a polyalkylene oxide having from 8 to 100 alkylene oxide units with a compound selected from the group consisting of a thionyl chloride and phosgene and then cleaving the reaction products by heating them to a temperature of from 70 DEG to 150 DEG  C. in the presence of a tertiary amine as catalyst, as crosslinking agent, at a temperature above 20 DEG  C. in aqueous solution or in a water-soluble organic solvent, the reaction being carried out to a point at which the viscosity of an aqueous solution containing 20% by weight of auxiliary is from 300 to 2,500 mPas.
Patent FI-73941-B (FI)
Inventor: SCHRADER DIETER
IPC: B65D83/14
Filed: 1982-03-26
Granted: 1987-08-31
Abstract: 1. Aerosol package with two separate chambers (5, 6), each equipped with at least one respective valve (7, 8, 9), for different components (A, B) to be intermixed in use, in which the intermixing takes place through common actuation of a respective valve (8, 9) of each of the chambers (5, 6), with an arrangement one above the other of an upper chamber (5) receiving a first component (A) substantially free of pressure as well as a lower chamber (6) receiving a second component (B) together with a quantity of propellant gas substantially adequate for the expulsion of the component mixture (A, B), as well as with a connecting channel (10) between the chambers, which is to be opened with the aid of a mother-daughter valve arrangement, which consists of a base valve (8) of the upper chamber (5) as well as a head valve (9) of the lower chamber (6) and is to be actuated through a mechanical movement of the chambers (5, 6) each towards the other, and with an independently actuable head or delivery valve (7) of the upper chamber (5), characterised thereby, that the chambers (5, 6) are arranged in a common container (1) each to be movable relative to the other, that the upper chamber (5) consists of synthetic material or aluminum and receives the lower chamber (6) in a prolongation, that a riser pipe (13) reaching substantially up to the chamber base is associated with the head valve (9) of the lower chamber and that the upper chamber (5) contains an additional shaking space which amounts to 5 to 50% of the volume of the mixture of both the components (A, B).
Patent FI-77408-B (FI)
Inventor: ROSENTHAL HEINRICH
IPC: B32B27/32
Filed: 1982-04-06
Granted: 1988-11-30
Abstract: A composite film comprising a polypropylene basis film being laminated at least on one surface with a layer combination of a heat sealable layer with an additive combination, an adhesion promotion layer, a gas-barrier layer, and an adhesion promotion layer and optionally a further heat sealable layer.
Patent FI-77798-B (FI)
Inventor: CASPER MARK S
IPC: B41L1/14
Filed: 1984-09-05
Granted: 1989-01-31
Abstract: A trim rewinder eliminates manual removal of trim, and increases rewinder capacity several-fold. A stripper portion of a bin of the rewinder strips wound trim from elongated members of the rewinder into the bin as the bin is removed.A pressure member wipingly presses trim tightly about the elongated members to compact the trim.
Patent FI-76849-B (FI)
Inventor: EDEL EUGEN
IPC: C05F7/02
Filed: 1984-09-25
Granted: 1988-08-31
Abstract: The invention relates to a method and apparatus for recovering lignin and alkali from an alkaline lignin solution. One or more electrolytic cells are used to anodically acidify the lignin and simultaneously cathodically regenerate alkali. The invention is especially advantageous for the preparation of pure lignin and alkali from the waste liquor of a cellulose process.
Patent FI-92984-B (FI)
Inventor: SHIMAHARA HIRONOBU
IPC: B28B1/26
Filed: 1988-01-29
Granted: 1994-10-31
Abstract: A novel mold(1) for cast-molding a slip is provided, which comprises a divisible casting mold including a plurality of mold portions to form a mold cavity(4) when mated together; each mold portion including an air-tight housing(2), an intermediate layer(5) of coarsely porous structure adjacent to the air-tight housing(2), and a solid synthetic resin filter layer(3) of fine open-cell structure; a slip supply duct(8) being connected with said mold cavity(4) and communicated with the outside of the air-tight housing(2); a fluid-flowing duct(9) being connected with said coarse intermediate layer(5) and communicated with the outside of the air-tight housing(2); said filter layer(3) being permeably joined to the coarse intermediate layer(5), and having substantially precise shape and dimension of substantially uniform fine open-cell structure. Such a filter layer(3) is produced by molding a flowable emulsion material comprising by weight about 100 parts of a curable synthetic resin material, about 1 to about 30 parts of a non-ionic emulsifier, about 1 to about 200 parts of water, and about 50 to about 600 parts of filler particles, into a cured filter layer; and uniformly eluting with a solvent an emulsifier-based viscous substance finely dispersed in the cured resin layer, and further curing the resin layer.
Patent FI-94337-B (FI)
Inventor: BODOR NICHOLAS S
IPC: C07D215/20
Filed: 1988-11-15
Granted: 1995-05-15
Abstract: The present invention provides a compound having the formula:        Ar - X - CH2 - @ - CH2 - NHR  Wherein:      X is -O-, -CH2- or ---; Y is =O or a derivatized keto group, each of which is hydrolyzable or enzymatically convertible to a ketonic group; R is alkyl having from 1 to 12 carbon atoms or aralkyl having from 7 to 20 carbon atoms, Ar is the 3-position cyclic residue of a 1-alkylamino-2-propanol beta -adrenergic blocker having a cyclic substituent at the 3-position thereof. The present invention also covers an acid-addition salt of the above compound with a pharmaceutically acceptable acid. The compounds and salts thereof of the present invention have a  beta -adrenergic blocking effect and can be used for treating intraocular pressure.
Patent FI-83892-B (FI)
Inventor: HOLOPAINEN PENTTI
IPC: D21D5/02
Filed: 1989-06-05
Granted: 1991-05-31
Abstract: The pressurized screening device according to the invention is designed for screening fibre pulps, especially paper pulp or corresponding. The pressurized screening device is provided with a screenplate (11) with perforations (12), cleaning means (17), being in connection with and moving relative to the screenplate (11), means (2, 4, 15) for generating the relative motion between the screen plate (11) and said the cleaning means (17), piping means (8, 9, 10) firstly for introducing fibre pulp into the pressurized screening device, secondly for conducting the accepted fibre pulp into the next process stage and thirdly for discharging rejected pulp from the pressurized screening device preferably to be returned into the pressurized screening device, and guiding devices (13) for shifting the flow direction of unscreened fibre pulp to a direction essentially perpendicular to the screenplate (11). The guiding devices (13) has a combination of several compartments (27) for guiding the flow of fibre pulp. They are comprised of side walls (20), back wall (24) and baffle blades (28).
Patent FI-89607-B (FI)
Title: Feeding process for aluminium electrolyses
Inventor: KUMPULAINEN VESA
IPC: C25C3/14
Filed: 1991-12-12
Granted: 1993-07-15
Abstract: A process for feeding a pulverulent raw material, such as aluminium oxide, into an aluminium electrolysis by making use of an oscillating feeding device 5. The raw material is introduced into a guide box 7, which is placed in contact with the surface of the electrolyte smelt 9. Mechanical vibration V is directed towards the feeding device 5 which has been placed in the said guide box 7. The vertical amplitude of this vibration is selected within the range 0.5...1.5 cm. The frequency of the vibrations is selected within the range 1...40 Hz. The raw material is fed continuously, using the said feeding device 5, via an opening 9 in an electrolyte crust 8 which is formed around the guide box 7. <IMAGE>
Patent FI-100622-B (FI)
Inventor: LOPEZ PEREZ JOSE
IPC: G09F11/18
Filed: 1992-06-25
Granted: 1998-01-15
Abstract: The structure of the display panel is comprised of a frame (1) provided with wheels (2) rolling on rails (3) and wherein is mounted, with the possibility of regulating the inclination, a structure comprised of two side plates (4) and wherein are set two guiding rollers (18) for a laminar body (17) carrying different information, and two rollers (21) for rolling/unrolling said laminar body (17), said rollers being actuated by respective electric motors (22-22') which, appropriately controlled by a computer program, allow to change the information provided by the panel after appropriately predetermined display periods of time. <IMAGE>
Patent FI-91701-B (FI)
Inventor: POHJAKALLIO PEKKA
IPC: H04W76/02
Filed: 1992-08-14
Granted: 1994-04-15
Abstract: The invention relates to a method for the transfer of user data in packet format in a digital cellular radio system comprising at least one organization channel common to all mobile stations (MS) for sending pages, connection requests, and channel assignements, so as to establish an actual connection on another channel. In the invention, the user data is transferred in packet format from the mobile stations (MS) to the base station (BTS1-BTS4) in modified paging messages which are sent on the organization channel interleaved with normal paging messages but will not result in a normal connection establishment.
Patent FI-109025-B (FI)
Inventor: MANSOUR TAREK
IPC: C07D473/30
Filed: 1993-11-19
Granted: 2002-05-15
Abstract: The present invention relates to highly diastereoselective processes for production of cis-nucleosides and nucleoside analogues and derivatives in high optical purity and intermediates useful in those processes.
Patent FI-110689-B (FI)
Inventor: ZONJEE THEODORUS
IPC: C09D167/08
Filed: 1995-05-23
Granted: 2003-03-14
Abstract: The invention relates to a resin composition containing an alkyd resin and a reactive diluent. The reactive diluent is an alkyl ester derived from the acid of an unsaturated vegetable oil. The iodine number of the oil is greater than 130. A (C1-C6) alkyl ester is used as alkyl ester. Tung oil or calendula oil, for instance, is used as oil.
Patent FI-104400-B (FI)
Inventor: FRANKEN JOACHIM
IPC: A45D40/00
Filed: 1996-10-23
Granted: 2000-01-31
Abstract: PCT No. PCT/EP95/01435 Sec. 371 Date Nov. 27, 1996 Sec. 102(e) Date Nov. 27, 1996 PCT Filed Apr. 18, 1995 PCT Pub. No. WO95/28857 PCT Pub. Date Nov. 2, 1995A container (1) for applying a spreadable product (4) such as an adhesive, having an inner tube (3) that is removably mounted in an outer tube (5). A piston-like plunger (12) is disposed in the inner tube (3) and is moveable axially within the inner tube (3), for moving the spreadable material therein to a position projecting from the tubes, for application to a surface. A removable closure cap is provided to enclose the spreadable material within the two tubes.
Patent HU-181363-B (HU)
Title: Gas fixture advantageously for ovens
Inventor: VOLLPRECHT SIEGFRIED
IPC: F23N5/04
Filed: 1981-07-08
Abstract: The regulator has a switching valve operated by a pivot lever engaged by the thermostatic element, for overcoming the valve closure spring and more the valve closure element into the open position. The pivot lever has a snap lever attached to its free end, cooperating with a snap-action spring blade. The pivot lever, the snap-action lever, and the spring blade are so dimensioned that the torque acting on the pivot lever has a max. value when it is in the end position, corresponding to full valve closure. Pref. when the pivot lever is in the opposite end position, any further movement between the pivot lever and the snap-action lever is prevented.
Patent HU-190592-B (HU)
Title: Process for preparing cysteamine derivatives
Inventor: GRIFFIN RICHARD M
IPC: C07C335/04
Filed: 1983-06-15
Abstract: Cystamine derivatives of the formula:   <IMAGE>   [wherein n represents 2 or 3, R1 and R2 each represents a hydrogen atom, or an alkyl group optionally substituted by a hydroxy, amino, alkylamino or dialkylamino group, or represents a cycloalkyl or aryl group, and X1 represents a group selected from the formulae =N-CN, =N-NO2, =N-COR3, =N-COOR3, =N-NH-CONH2, =N-SO2R3, =CH-NO2, =CH-SO2R3, =C(CN)2, =C(CN)COOR3 and =C(CN)CONH2 (wherein R3 represents an alkyl or aryl group), or R1 represents a hydrogen atom, R2 represents an alkyl group optionally substituted by a hydroxy, amino, alkylamino or dialkylamino group, or represents a cycloalkyl or aryl group and X1 represents an oxygen or sulphur atom] have been found to be useful in the promotion of the growth of non-human animals including birds. Prcesses for the preparation of the cystamine derivatives and compositions containing them for administration to non-human animals are described.
Patent HU-188649-B (HU)
Title: Method for drying corns of maize by hot gases as well as apparatus for carrying out the method
Inventor: WEISS PETER
IPC: A23K30/00
Filed: 1980-10-10
Abstract: The method dries grain maize using warm gas, the grains being removed from the cob before or after the drying operation. Heating of the gas used for drying is effected both by burning the cobs after removal of the grains, and also the straw if desired, and in addition by heat recovery from the moist gas discharged after the drying operation. Fans can be mounted in the drying chamber feed and discharge conduits, while a conveyor delivers the stripped cobs from a separating mechanism to the combustion chamber. Heat exchangers for the heat recovered from the discharged gas are mounted in the conduits.
Patent HU-189163-B (HU)
Inventor: SPILLECKE VOLKMAR
IPC: A01J5/10
Filed: 1982-08-05
Abstract: DIE ERFINDUNG BEZWECKT DIE SENKUNG DES ENERGIEAUFWANDES, DER BETRIEBSTEMPERATUR UND DES VERSCHLEISSES, INSBESONDERE BEI DRUCK-VAKUUMDICHTERN BEI KLEINMELKANLAGEN.DIE TECHNISCHE AUFGABE BESTEHT DARIN, DEN VERDICHTER ZYKLISCH ZU ENTLASTEN, WENN FUER DIE STIMULATION DES KUHEUTERS KEINE DRUCKLUFT GEBRAUCHT WIRD. ERFINDUNGSGEMAESS GESCHIEHT DIES DADURCH, INDEM UEBER EINEN IMPULSGEBER, DER ZWECKMAESSIGERWEISE VAKUUMGESTEUERT IST, UEBER EINE MEMBRAN EIN ENTLASTUNGSVENTIL ZYKLISCH BETAETIGT WIRD, DAS IN DER DRUCKLEITUNG, ZWECKMAESSIGERWEISE AM DRUCKSTUTZEN DES VERDICHTERS ANGEORDNET IST, SO DASS DER VERDICHTER ZYKLISCH DRUCKLOS ARBEITET.
Patent HU-192703-B (HU)
Inventor: KOZAK IMRE
IPC: F16L33/00
Filed: 1984-10-02
Abstract: Tömlőcsatlakozó főként nagyátmérőjű tömlővezetékek
tökéletesítésére, amelynek lényege, hogy a
nagytengely-vonal (1) és a kistengely-vonal (2) kitérően
keresztezi egymást, a gerinctömlő (3) hátoldalán és
a szárnytömlő (4) hátoldalán alkotóirányban ugyanazon
tömlő fő részeit összekötő folyamatos tömlőfalat
képező nyereghát (6), a gerinctömlőn (3) és a
szárnytömlőn (4) szükség szerint csatolószerve (12)
van. A főként nagyátmérőjű tömlők, tömlőleágazások,
valamint más hasonlók készítésének lényege,
hogy a rövidebb-hosszabb tömlőket, tömlőleágazásokat
(10, 11), vagy más hasonlókat hajlékony lapanyagból
alakítjuk ki, amely lapanyag illesztéseit (8)
szükség szerint vanásos és/vagy hermetikus egyesítést
biztosító előnyösen ragasztásos és/vagy hegesztéses
toldatképzéssel építjük egy egységgé össze.
Patent HU-187399-B (HU)
Title: Process for preparing imidazolyl-propanol derivatives
Inventor: SAJI IKUTARO
IPC: C07D233/60
Filed: 1981-12-21
Abstract: An imidazolyl propanol compound of the formula <CHEM>  wherein  Ph is a phenyl group or a phenyl group substituted with halogen, and A is -S-R<1> (wherein R<1> is a C1-C15 alkyl group, a phenyl group, a phenyl group substituted with at least one of C1-C8 alkyl, C1-C8 alkoxy and halogen, a benzyl group or a pyridyl group), -O-R<2> (wherein R<2> is a hydrogen atom, a C1-C15 alkyl group, a C1-C8 alkyl group substituted with at least one of phenylthio and C1-C8 alkylthio, a C3-C8 alkenyl group, a C7-C8 aralkyl group, a C7-C8 aralkyl group substituted with halogen, a phenyl group or a phenyl group substituted with at least one of halogen, C1-C8 alkyl, C1-C8 alkoxy, acetylpiperazino and C1-C8 alkylthio), or <CHEM> (wherein R<3> and R<4> are each a hydrogen atom, a C1-C8 alkyl group, a C3-C6 cycloalkyl group, a benzyl group, a benzyl group substituted with halogen, a C1-C8 alkyl group substituted with at least one of hydroxyl, morpholino and C1-C8 alkoxy, a C3-C6 alkynyl group, a furfuryl group or a tetrahydrofurfuryl group, or when taken together with the adjacent nitrogen atom, they represent a morhpholino group, a piperazino group, an N-(C1-C8)alkylpiperazino group, an N-phenylpiperazino group, an N-benzylpiperazino group, a pyrrolidino group or a pperidino group), and its acid addition salts, which are useful as antifungal agents.
Patent HU-194379-B (HU)
Inventor: FRIEDREICH ISTVAN
IPC: F28F1/00
Filed: 1985-12-04
Abstract: A találmány tüzelő-, illetve fűtőolajégők olajelőmelegítőjének megoldását adja, melynek ismérve az, hogy hőcserélő egységekből (3) csőfűtőtestekből (2J építőelemszerűen menetes csapokra (10) felfűzhető módon össze-, illetve szétszerelhető kivitelű, hőcserélő egységei (3) alumíniummal körülöntött megfelelő fűtőfelületű csőlírából — az indító thermosztát befogadására - hozzákapcsolódó kettősfalú - belső csövét illetően alul zárt - olajkivezető csőből (9) állnak, téglalap keresztmetszetűek, melyek két szembenfekvő szélesebbik oldalán a csőfűtőtest (2) befogadására, valamint a szabályozó thermosztát érzékelőjének befogadására hornyok (6, 7) vannak kiképezve. A fenti módon összeszerelt olajelőmelegítő mind a hat oldalán hőszigetelés van. A kész olaj melegítőt mechanikai sérülés ellen lemezburkolat (5) védi. A thermosztátok és egyéb villamos csatlakozó elemek egy alumínium öntvény fedél (1) alatt helyezkednek el.  -1-
Patent HU-206004-B (HU)
Inventor: BALOGH GEZA
IPC: H04M9/08
Filed: 1989-09-26
Abstract: A találmány tárgya hangosító rendszer, amely elsősorban számítógép és/vagy mikroprocesszorral vezérelt hozzászólói hangrendszerként konferenciák és ülések lebonyolítására szolgál. A találmány szerinti hangosító rendszerben a mikrofonok és a hangsugárzók hangszektorokba vannak elhelyezve. A hozzászólói szándékot közlő bejelentkezési nyomógomb (knm) által kijelölt és a számító- HU 206 004 B A leírás terjedelme: 8 oldal (ezen belül 3 lap ábra)
Patent HU-201253-B (HU)
Title: Method for extracting the carbon monoxide content of industrial gases
Inventor: KOVACS VALERIA
IPC: B01D53/02
Filed: 1988-12-13
Abstract: Gases comprising CO are oxidised by passing through a catalytic filter producing CO2 and water. The filter is prepd. - by impregnating a ceramic base with a 0.1% soln. of nickel- iron- and copper-nitrate.