baber/WOPTO huggingface dataset:
Patent SG-11201407910X-A (SG)
Title: Thermally conducting rods for use in aerosol-generating articles
Inventor: METRANGOLO ALESSANDRO
IPC: A24D1/22
Filed: 2013-05-30
Abstract: (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 5 December 2013 (05.12.2013) WIPOIPCT (10) International Publication Number WO 2013/178768 A1 (51) International Patent Classification: A24B 3/14 (2006.01) A24F 47/00 (2006.01) A24C5/18 (2006.01) (21) International Application Number: (22) International Filing Date: (25) Filing Language: (26) Publication Language: PCT/EP2013/061210 30 May 2013 (30.05.2013) English (30) Priority Data: 12170359.9 31 May 2012 (31.05.2012) English EP (71) Applicant: PHILIP MORRIS PRODUCTS S.A. [CH/CH]; Quai Jeanrenaud 3, CH-2000 Neuchatel (CH). (72) Inventors: METRANGOLO, Alessandro; Cite Suchard 30a, CH-2000 Neuchatel (CH). GINDRAT, Pierre-Yves; Route des Croix 9, CH-1907 Saxon (CH). FAULKNER, John; Rue de la Gare 24, CH-2023 Gorgier (CH). (74) Agent: BATES, Alan Douglas Henry; Reddie & Grose LLP, 16 Theobalds Road, London Greater London WC1X 8PL (GB). (81) Designated States (unless otherwise indicated, for every kind of national protection available)'. AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available)'. ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: — with international search report (Art. 21(3)) — before the expiration of the time limit for amending the claims and to be republished in the event of receipt of amendments (Rule 48.2(h)) (54) Title: THERMALLY CONDUCTING RODS FOR USE IN AEROSOL-GENERATING ARTICLES 00 l> 00 l> i-H (57) Abstract: A rod is formed from a first sheet comprising an aerosol-forming material (2) and second a sheet comprising a O thermally-conductive material (3), the first and second sheets being gathered together and circumscribed by a wrapper (12). The rod CJ may be used as a component part of an aerosol-generating article.
Patent SG-11201804344W-A (SG)
Title: Kimchi packaging container with flexibility and firmness
Inventor: SON SEOL HEE
IPC: B65D85/00
Filed: 2016-11-22
Abstract: Kimchi packaging container with flexibility and firmness ೿ ഀ The disclosure relates to kimchi packaging container with flexibility and firmness, in which storage and transportation can be facilitated by maintaining the shape of 5 the lower end of an accommodation part, and the kimchi packaging container with flexibility and firmness includes: an accommodation part formed in the shape of a pouch made of a flexible material; a connection part for maintaining the upper end of the accommodation part in an open state; a cover 10 part for blocking the opening of the upper end of the connection part and pressing kimchi accommodated in the accommodation part with pressing plates provided on the bottom surface thereof; and a support part for blocking the opening of the lower end of the accommodation part and formed 15 in a fixed shape so as to constantly maintain the shape of the lower end of the accommodation part. Figure 2
Patent SG-11201900068P-A (SG)
Title: Single crystal silicon plate-shaped body and production method therefor
Inventor: MASADA ISAO
IPC: C30B29/06
Filed: 2017-06-30
Abstract: SINGLE CRYSTAL SILICON PLATE-SHAPED BODY AND PRODUCTION METHOD THEREFOR An object of the invention is to develop a single crystal silicon that becomes such a high-performance device as a solar cell or a power device in which decrease in lifetime is suppressed even if heating treatment from 800°C to 1100°C performed in a device production process is applied in a single crystal silicon plate-shaped body having a high oxygen concentration. Provided is a single crystal silicon plate-shaped body as cut out from an upper portion of a straight body portion of a CZ method single crystal silicon ingot in which an interstitial oxygen concentration in a crystal is 25 ppma to 45 ppma and a substitutional carbon concentration is 0.5 ppma or less in a radial center, wherein in the radial center, oxygen precipitates are not observed in a bulk in an image of 200,000 times by means of a transmission electron microscope, and after heating the single crystal silicon plate-shaped body at 950°C for 60 minutes, oxygen precipitates are observed in an image of the 200,000 times, and a shape of the oxygen precipitates is observed in a polyhedral structure in an image of 2,000,000 times. (Fig.1)
Patent SG-11201903554X-A (SG)
Title: Concrete bonded-type waterstop and construction method therefor
Inventor: YOUN HEE JUNG
IPC: E04B1/68
Filed: 2017-07-18
Abstract: SG-947-PCT 24 [] Provided are a concrete bonded-type waterstop and a construction method therefor, wherein the waterstop is installed in a construction joint and an expansion joint in order to ensure a waterproof function of an underground concrete structure, an adhesive and a protective coating agent are applied to a predetermined location of 5 a surface of the waterstop to completely bond the surface of the waterstop to concrete after casting and curing the concrete whereby a water leak path is completely blocked to maximize a water stopping effect, and the concrete bonded-type waterstop in which the concrete and the waterstop are completely bonded can significantly improve waterproof performance of an underground concrete structure, thereby 10 reducing repair cost for water leaks and minimizing delay in subsequent processes. 15
Patent AT-393934-B (AT)
Title: Fungicidal composition
IPC: C07D493/10
Filed: 1987-01-07
Granted: 1992-01-10
Abstract: There are described carrier- and active-principle- containing fungicidal compositions which comprise, as active principle, a compound of the general formula I (the meanings of R1 to R4 are given in claim 1 and in the description). The compounds of the formula I can be termed 2,2,5,5-tetracyanotetra- and -dihydrofurans or 2,2,4,4-tetracyano-3-oxabicyclo compounds.
Patent HU-199649-B (HU)
Inventor: HOLLOSI SZILARD
IPC: A01H5/10
Filed: 1987-01-06
Abstract: A találmány korai virágzású és korai érésű, jó szárszilárdságú, finom jellegű, felálló, a Szegedi 30 fajtánál alacsonyabb és jó kiegyenlítettségű, a Szegedi 30 és az E 8 olajlen fajták keresztezéséből egyedszelekcióval nemesített olajlen. Hengeres szárának vastagsága tág térátlásban sem haladja meg a 2.5 mm-t és a szár színe éréskor sárgászöld. Levele lándzsás és sötétzöld. Virága tölcséralakú, sziromlevele világoskék, csészelevelének pontozottsága közepes. Toktermése gömbölyű és zárt. Magja közepes nagyságú, elliptikus kerületű, mindkét oldalán domború és ezerszemtömege 7.0—8.0 g. Tenyészideje 95 105 nap. Jellegzetessége, hogy szára gyengén elágazó, tok válaszfala sima, magja sötétbarna színű, olajtartalma 42—44%, termőképessége a Szegedi 30, a Szegedi 43 és a Szegedi 62 fajtákénál nagyobb, valamint szárazságtűrőképessége kiváló és Septoria inicolá-val szemben ellenálló, továbbá a vetéstől számított 48—50. napon virágzik, a mag ezerszemtőmege közepes. H U199649 B A leírás terjedelme: 4 oldal, rajz nélkül -1-
Patent ZA-9552-B (ZA)
Title: Triple layer papermaking fabric providing improved fiber support
Inventor: HAWES JOHN M
IPC: D21F1/00
Filed: 1995-01-05
Abstract: A triple-layer papermaking fabric includes top and a bottom weft yarn layers interwoven with a system of warp yarns. The warp yarn system includes pairs of associated, stacked first and second warp yarns. The first warp yarn in each pair interweaves with the top weft yarns in a plain-weave pattern occasionally broken by an interweaving with a bottom weft yarn to join the top and bottom weft yarn layers together. The second warp yarn in each pair, ordinarily running between the top and bottom weft yarn layers and stacked below the first warp yarn, weaves over the top weft yarn skipped by the first warp yarn when it weaves down under a bottom weft yarn to maintain the plain-weave character of the top surface of the fabric. The second warp yarn never weaves with the bottom weft yarns. The fabric is flat-woven, and subsequently seamed into endless form. The first warp yarns have an exaggerated crimp to provide the fabric with an enhanced seam strength. The second warp yarns, having relatively little crimp, provide the fabric with an enhanced stretch resistance.   <MATH>
Patent AT-393860-B (AT)
Title: Spacer
IPC: E04C5/20
Filed: 1988-03-07
Granted: 1991-12-27
Abstract: A spacer 1 for reinforcement in concrete structural parts comprises a preferably bar-like foot part 3 and a connecting part 2. The connecting part 2 has a plate-like base part 5 from which there projects in the upward direction two bar-like parts 6 which have a plurality of lugs 7, 8, 9 and 10 which are oriented towards one another. The lugs 7, 8, 9 and 10 are separated from one another by slits 12, 13 and 14, with the result that they can be bent over laterally in the region of a reinforcement rod on which the spacer 1 is to be fastened, whereas the lugs arranged above the rod resume their original position and butt against the reinforcement rod 18 from above, with the result that the spacer is connected securely to the rod 18. <IMAGE>
Patent AT-384260-B (AT)
Title: Vibration damper for structures which are sensitive to oscillation
Inventor: ROLLER MEINHARD DIPL ING
IPC: E04B1/98
Filed: 1986-04-09
Granted: 1987-10-27
Abstract: The invention relates to a particularly advantageous design for damping vibration in narrow tower-like or bridge-like structures in accordance with the two-mass- oscillator system, a pneumatically acting damping element 6 designed, in particular, as a rubber bellows being arranged between the secondary oscillator (pendulum) 4 and the structure 1. <IMAGE>
Patent HU-190235-B (HU)
Inventor: CSERHALMI TIBOR
IPC: H01J29/22
Filed: 1984-02-10
Abstract: A találmány tárgya eljárás elektronsugárcsovek hártyázási és aluminizáiási technológiájának tökéletesítésére, melynek során az elektronsugárcső ernyőfelületén levő lumineszkáló réteget benedvesitjük, a nedvesített felületet lakkoldat alkalmazásával szerves hártyával bevonjuk, megszárítjuk, majd célszerűen vákuumpárologtatással aluminiumréteggel vonjuk be. A találmány szerinti eljárást az jellemzi, hogy a szerves hártya előállításához használt lakkoldatba finom szemcseméretű, előnyösen kb. 5 μτη átmérőjű szilárd szemcsés anyagot keverünk. Ez az anyag üvegpor és/vagy kovasav és/vagy fénypor, kb. 5-9 g/1 koncentrációban. Szilárd szemcsés anyagként a lumineszkáló ernyőt alkotó fénypor finom frakciója is alkalmazható. -1-
Patent HU-186907-B (HU)
Title: Method and apparatus for producing alloyed copper wire by continuous wire casting
Inventor: SIPOS DOMOKOS
IPC: C23C2/00
Filed: 1982-02-23
Abstract: An alloyed copper wire rod is formed by continuous rod-casting, wherein a core rod is driven through a crucible containing molten metal. High purity copper melt is continuously charged into the crucible; to which an alloying material is simultaneously added in a quantity which corresponds to the given casting speed of the core rod. The required alloy thus obtained is crystallized on the surface of the core-rod as it passes through the crucible and the rod produced is treated in the usual manner i.e., cooling, rolling and coiling.
Patent HU-212520-B (HU)
Inventor: ISAAK GYOERGY
IPC: G01N17/00
Filed: 1989-02-14
Abstract: A találmány tárgya készülék zárt terekben vagy csővezetékeken
belüli korrózió sebességének üzemközbeni
mérésére, amelynek vizsgálati tér csatlakozócsonkjához
- előnyösen záró csap közbeiktatásával - csatlakozó
peremes/menetes közdarabja, benne elmozdíthatóan
elrendezett mérőszondája, hozzájuk csatlakoztatott
- előnyösen tömszelencével és tartó szerkezettel
rendelkező - betolószerkezete van, a mérőszondának
tartószára, a tartószárhoz rögzített és/vagy rajta elrendezett
érzékelője/i, próbatestje/i, és betolószára van,
továbbá ellenőrző és jelfeldolgozó egysége van, amelynek
az érzékelőhöz és optikai ellenőrzőcsonkban lévő
üvegszáloptikához csatlakozó csatlakozókábelei vannak.
Jellemzője, hogy a peremes/menetes közdarab optikai
ellenőrzőcsonkkal ellátott (4') ellenőrző közdarab
(1), amely ellenőrző közdarabban (1) megfigyelőtér
(V) van kialakítva, az üvegszáloptika (4) egyik vége az
optikai ellenőrzőcsonkon (4') átvezetve a megfigyelőtérbe
(Γ) nézőén van elrendezve, másik vége csatlakozókábelen
(5") át az ellenőrző és jelfeldolgozó egységen
(5) van csatlakoztatva, valamint a próbatest/ek (7)
és az érzékelő/k (6) a tartószáron (3') sorosan vannak
elrendezve.
Patent HU-189249-B (HU)
Inventor: SAGI LASZLO
IPC: F16D41/24
Filed: 1983-03-22
Abstract: A találmány tárgyát képező fékagy teljes mértékben megfelel az üzemi követelményeknek, viszont egyszerű szerkezeténél fogva lényegesen csökkenti a gyártási költségeket és helyigénye is kicsi. Lényege, hogy a hajtást előnyösen egy kilincses hajtószerkezet, míg a fékezést egy kúpos fékdobba illeszkedő egyetlen fékkúp végzi.  -1-
Patent YU-46405-B (YU)
Inventor: POPOVIC R
IPC: H01L27/02
Filed: 1986-05-22
Abstract: A Hall element incorporated inside a semiconductor body has a P-N junction barrier which surrounds the active zone of the Hall element in all directions. The output of the Hall element is connected through a feedback control circuit to control the thickness of the P-N junction barrier, thereby ensuring long duration, temperture stability and linearity for the Hall element.
Patent ZA-93577-B (ZA)
Title: Spray-chilled nabumetone
Inventor: LEONARD GRAHAM STANLEY
IPC: A61P43/00
Filed: 1993-01-27
Abstract: PCT No. PCT/GB93/00145 Sec. 371 Date Feb. 22, 1993 Sec. 102(e) Date Feb. 22, 1993 PCT Filed Jan. 22, 1993 PCT Pub. No. WO93/14747 PCT Pub. Date Aug. 5, 1993Nabumetone which is spray-chilled and formulated into unit dose forms which have a smaller volume than was previously possible.
Patent ZA-93889-B (ZA)
Title: Process for the production of a two-coat finish, and nonaqueous coatings suitable for this process.
Inventor: ROECKRATH ULRIKE
IPC: C09D175/00
Filed: 1993-02-09
Abstract: PCT No. PCT/EP93/00242 Sec. 371 Date Aug. 23, 1994 Sec. 102(e) Date Aug. 23, 1994 PCT Filed Feb. 3, 1993 PCT Pub. No. WO93/15849 PCT Pub. Date Aug. 19, 1993.The invention relates to a process for the production of two-coat finishes of the basecoat/clearcoat type, in which nonaqueous transparent topcoats are employed, which comprise (A) a synthetic resin containing hydroxyl groups or a mixture of synthetic resins containing hydroxyl groups, (B) an amino resin or a mixture of amino resins, and (C) a blocked polyisocyanate or a mixture of blocked polyisocyanates, in which component (C) comprises isocyanate groups blocked both with a blocking agent (I) and with a blocking agent (II), and the blocking agent (I) being a dialkyl malonate, the blocking agent (II) being a blocking agent which is different from (I) and contains active methylene groups or an oxime, and the ratio of equivalents between the isocyanate groups blocked with (I) and the isocyanate groups blocked with (II) being between 1.0:1.0 and 9.0:1.0.
Patent ZA-95362-B (ZA)
Title: Olefin production
Inventor: FREEMAN JEFFREY W
IPC: C08F2/00
Filed: 1995-01-17
Abstract: A process is provided to stabilize and/or reactivate an olefin production catalyst system which comprises contacting an olefin production catalyst system, either before or after use, with an aromatic compound.
Patent ZA-95673-B (ZA)
Title: Continuous casting plant for guiding billets
Inventor: PLESCHIUTSCHNIGG FRITZ-PETER
IPC: B22D11/128
Filed: 1995-01-27
Abstract: PCT No. PCT/DE95/00094 Sec. 371 Date Jul. 29, 1996 Sec. 102(e) Date Jul. 29, 1996 PCT Filed Jan. 20, 1995 PCT Pub. No. WO95/20448 PCT Pub. Date Aug. 3, 1995A continuous casting having a mold for producing strands in the form of slabs, thin slabs, blooms, and billets which results in a central running of the strand in the entire strand guide and in highly reliable casting at casting speeds of up to 6m/min. As a result of the cambered, concave shape of the mold and entire strand guide, the strand is guided coaxially to the entire strand guide from the cast surface until the strand exits at the delivery end of the continuous casting machine so that sideways movement of the entire strand in the direction of one of the narrow sides (snaking) is suppressed. This symmetrical running of the strand shell box to the mold and of the rest of the strand to the strand roll-guide results in a uniform symmetrical formation of the strand shell and its temperature field (isotherms), the withdrawal forces, and the loading of the strand shell in the region of the mold and the rest of the strand guide while at the same time ensuring that the strand runs centrally with reference to the center axis in the direction of the strand axes.
Patent AT-409570-B (AT)
Title: Current-supplied inverter for island or network operation
Inventor: HIMMELSTOSS FELIX DIPL ING DR
IPC: H02M7/538
Filed: 1997-09-09
Granted: 2002-09-25
Abstract: The invention relates to an inverter circuit (Fig. 1) for converting from DC voltages (UDC) into alternating currents, using a transformer (Tr) with middle-tapped primary winding, a divided inductance (LA, LB) and two bidirectional power switches (S1&DS1, S2&DS2).A conventional 50 Hz mains transformer can be used as the transformer. This leads to reduced costs compared to transformers driven by signal frequency. According to the application, the input DC voltage can be supplied by a battery, solar cell, or fuel cell, or by rectification from the single- or multi-phase network or by rectification of the output voltage of AC or DC generators and subsequent, possibly only coarse, filtering.In the circuit mentioned here an output AC current of optional form (average value must not be zero) is produced from an input DC voltage by corresponding driving. As the field of use of the circuits there is, e.g. thesupply of electrical energy into a single-phase AC network.<IMAGE>
Patent AT-382310-B (AT)
Title: Method for decalcifying, disinfecting and cleaning mouth rinse devices, etc
Inventor: FELSCH HORST
IPC: A61C19/00
Filed: 1985-09-30
Granted: 1987-02-10
Abstract: To decalcify, disinfect and clean mouth rinse devices, toothbrushes, beakers, air humidifiers for rooms, or humidifiers for ventilation and inhalation equipment, these are treated with a mixture of 15 to 80 percent by weight of lactic acid, glycolic acid, tartaric acid, citric acid, formic acid, acetic acid and/or propionic acid, 10 to 60 percent by weight of ethanol, isopropanol and/or n-propanol, at least 5 percent by weight of water and, if appropriate, traces of essential oils. For example, mouth rinse devices are treated with a mixture of 30 percent by weight of lactic acid, 25 percent by weight of isopropanol, 45 percent by weight of distilled water, and 0.05 percent by weight of citrus oil, for 8 hours at 15 to 25 degrees C. Substantial decontamination can be achieved in this way.
Patent AT-389281-B (AT)
IPC: B62D21/18
Filed: 1986-12-09
Granted: 1989-11-10
Abstract: A self-propelled, off-road vehicle has a two-part chassis frame comprising a front frame part 3 supported on a front axle 4, and a rear frame part 1 supported on at least one rear axle 2. The front end section of the rear frame part 1 engages over the rear end section of the front frame part 3, which section protrudes to the rear beyond the front axle 4, and is connected to the said end section in a manner such that it can swivel about an axis parallel to the longitudinal axis of the vehicle via a front swivel bearing 6 and a rear swivel bearing 7, the front swivel bearing 6 being arranged above the front axle 4. A drive unit 5 is fastened to the rear end section of the front frame part 3 and is coupled with its rear end to the rear frame part 1 via the rear swivel bearing 7. <IMAGE>
Patent DK-160475-B (DK)
Inventor: CARLSON LARS
IPC: B65D5/72
Filed: 1985-03-19
Abstract: Opening arrangements for packing containers often comprise a prepunched hole which is covered by a tear-off cover strip. To facilitate the pouring out of liquid contents a so-called pouring rim is frequently present too, that is to say a material strip which forms a projecting rim over which the contents can run. The application of the pouring rim as well as the manufacture of the opening arrangement as a whole are facilitated by joining in advance the pouring rim in a detachable manner to the cover strip, whereafter the cover strip and the pouring rim can be applied as a unit.
Patent DK-157810-B (DK)
Inventor: LAFON LOUIS
IPC: A61P25/00
Filed: 1983-06-03
Abstract: The present invention relates to new industrial products, namely halogeno-benzhydrylsulfinylacetohydroxamic acids of formula: <IMAGE>  (I)  wherein: X1 is F, Cl, Br or CF3; and X2, which may be identical to or different from X1, is H, F, Cl, Br or CF3. These products are useful in therapeutics, particularly as substances acting on the CNS.
Patent DK-147637-B (DK)
Title: Process and plant for making cement
Inventor: RASMUSSEN POUL LEHN
IPC: C04B20/10
Filed: 1981-12-15
Abstract: The invention relates to a method of producing a dry cement composition, said method comprising feeding a continuous flow of a starting material (C, G), which includes cement binder clinker (C) and a content of water soluble chromate, to a cement mill (19 - 21), grinding the starting material in the cement mill while introducing a cooling medium into the mill so as to maintain the temperature of the material in the mill at a desired level, continuously discharging the ground cement material from the cement mill, and transferring the ground cement material to a storage container (33), characterized in that ferrous sulfate (FeSO4.nH2O) in an amount of 0.01 - 10 percent by weight is added to and mixed with said flow of material in a dry or non-dissolved condition at a location or at locations upstream of said storage container (33) in order to eliminate or substantially reduce said content of water-soluble chromate. Furthermore, the invention relates to a plant for carrying out the aforementioned method.
Patent DK-165074-B (DK)
Inventor: BROIDO GEORGES HENRY GUY
IPC: H05K13/08
Filed: 1987-12-02
Abstract: Sample intended to be examined under the microscope which comprises a board having a performation provided with a covering and embedded in resin. A checking device, of which the cylindrical rod has a diameter just less than that of the perforation, is inserted into the latter.
Patent FI-79778-B (FI)
Inventor: PATEL MANSUKH M
IPC: A23L27/30
Filed: 1984-08-21
Granted: 1989-11-30
Abstract: The application of thaumatin or monellin to the surface of a chewing gum composition comprising gum base, sweetener and flavoring provides flavor and sweetness potentiation. The thaumatin or monellin is present in an amount within the range of from about 0.5 to about 100 ppm by weight of the chewing gum composition and is conveniently applied as a rolling compound to the surface of the gum.
Patent FI-79916-B (FI)
Inventor: KING ALAN GEORGE
IPC: F42C19/12
Filed: 1985-03-19
Granted: 1989-11-30
Abstract: An inductive coupling device (1) is provided wherein the transmission of energy through the device is controlled by the application of a steady magneticfield within the magnetically permeable core (6) of the device, transmission being inhibited at high magnetic field intensity and restored when the magnetic field intensity is reduced to a low value. The device is especially advantageous for the safe coupling of ignition elements, such as blasting detonators, to an a.c. firing energy source.