SE129273C1

SE129273C1 -

Info

Publication number: SE129273C1
Authority: SE
Publication date: 1950-01-01

Description

Uppfinnare: T. S. Norklund. Inventor: T. S. Norklund.

FOreliggande uppfinning hanfor sig till en fOrkopplingsimpedans i form av en drossel eller transformator for elektriska urladdningsrOr fOr belysningsandamal sasom exempelvis lysror. The present invention relates to a ballast impedance in the form of a choke or transformer for electric discharge tubes for lighting purposes such as fluorescent lamps.

En vanlig forkopplingsimpedans for lysror och liknande belysningsror bestar av en j arnkarna, uppbyggd av lameller, och pa karnan anbragta lampliga drossel- eller transformatorlindningar. Over det salunda sammansatta aggregatet är i alla praktiskt kanda fall en kapa anbragt, medelst vilken impedansen inmonteras i armaturen. Vibrationerna i lamellerna ge vid driften upphov till stOrande ljud, som dessutom kunna bliva fOrstarkta genom inverkan av kapan. Man har darfor p sina hall ingjutit jarnkarnan med dess lindningar i en massiv klump av en asfaltkomposition. En sarskild yttre skyddskapa anvandes dock fortfarande for impedansens montering i elektriskt hanseende och dess mekaniska anbringande i armaturen. A standard ballast impedance for fluorescent lamps and similar lighting tubes consists of a core, made up of lamellae, and suitable choke or transformer windings arranged on the core. A capa is arranged over the thus assembled assembly in all practically known cases, by means of which the impedance is mounted in the luminaire. The vibrations in the slats give rise to disturbing noises during operation, which can also be amplified by the action of the hood. The iron core with its windings has therefore been poured into its halls in a massive lump of an asphalt composition. However, a special external protective cap was still used for the mounting of the impedance in the electrical sense and its mechanical application in the luminaire.

Uppfinningen avser nu ett sarskilt utforande av en i en isolerande massa ingjuten drossel eller transformator. Den avsedda impedansen uppvisar den beskaffenheten, att en av lameller uppbyggd jarnkarna jamte pa denna anbragta lindningar tillsammans aro ingjutna utan foregaende vakuumimpregnering i ett enda, av hardbar konstmassa bestaende och namnda delar gemensamt inbaddande holje, som ar tilldelat ett yttre utforande overensstammande med en drossel- eller transformatorkapas och som är forsett med skruvhal eller andra fastsattningsdon och med ingjutna anslutningsdon f6r impedansens installation, varvid karnlamellerna aro inbordes hopfogade till ett lamellpaket uteslutande genom deras inbakning i konstmassan. The invention now relates to a special embodiment of a choke or transformer cast into an insulating mass. The intended impedance is of such a nature that one of the lamellae built up of lamellae, together with the windings applied to it, is cast together without prior vacuum impregnation in a cohesive body consisting of hardenable artificial mass and named parts, which is assigned an outer design corresponding to a or transformer cut and provided with a screw tail or other fasteners and with molded connectors for impedance installation, the core lamellae being embedded in a lamella package exclusively by their incorporation into the artificial mass.

Vid ett sarskilt utforande av forkopplingsimpedansen enligt uppfinningen aro i dess undersida langsgaende spar inpressade for infallning av ledningar. Dessa spar kunna lampligen avgransas av bortbrytbara andvaggar. Impedansen kan salunda placeras pA ett plant underlag och genomdragas av ledningar. In a particular embodiment of the ballast impedance according to the invention, longitudinal grooves are pressed into its underside for the incidence of wires. These spares can easily be delimited by breakable duct walls. The impedance can thus be placed on a flat surface and traversed by wires.

En enligt uppfinningen utford impedans visas i hifogade ritning. Den bestar av en lamellerad jarnkarna 1 i form av en rektangular ram med ett langsgaende ok 6. Karnans luftgap aro betecknade med 5 och 11. Oket ar patratt tva lindningsspolar 3 och 7, vilka aro visade forsedda med andstod 4 av presspan eller annat isolationsmaterial. Jarnkarnan 1 och lindningarna 3 och 7 Oro helt ingjutna i ett holje 12 av en hardbar konstmassa sasom bakelit. For framstallning av hOlj et anbringas jarnkarnan med lindningarna omgivna av pulverformig kostmassa i en pressdyna, som ar utford att kunna upphettas. En presstampel nedsankes och hoppressar konstmassan till ett holje 12 av sadan yttre form, att konstmasseholjet direkt tjanar som kapa och att en sarskild extra skyddskapa saledes joke langre ar nodvandig. HOljets tjocklek kan pa de fiesta stallen hallas omkring 2 mm. Dess ovansida Or forsedd med en ansats 2, vars yta gjorts vasentligen plan for inpressning av impedansens markning. Kapans vaggtjocklek overstiger fordenskull darstades mattet c :a 2 mm stallvis och foljer av dessa skal icke helt det inbakade godsets konfiguration. Jarnlamellernas andar aro fOrsedda med genomgaende hal, i vilka en dorn intrades under inbakningen. PA detta satt erhalles tva skruvhal 8 och 17 for impedansens anbringande i armaturen. Lindningarna 3 och 7 aro f6rsedda med grova anslutningstampar 9, 10, 14 och 16 for impedansens elektriska inkoppling. Dessa tampar aro likaledes inbakade med shin inre andar, sa att de sitta viii fast i den hardade massa, som uppkommit vid kapans tillpressning. PA kapans undersida ha langsgaende spar 13 och 15 inpressats vid kapans framstallning. Be aro avsedda att utnyttjas for doljande av Adana ledningar, som behOya dragas forbi impedansen 1 saraband med monteringen i armaturen. Dessa spar kunna lampligen avgransas av bortbrytbara andvaggar, — — varigenom kapans yttre far ett slutet utseende i de fall, (IA dylika spar ej behova utnyttjas. An impedance challenge according to the invention is shown in the accompanying drawing. It consists of a laminated iron core 1 in the form of a rectangular frame with a longitudinal yoke 6. The air gap of the core is denoted by 5 and 11. The yoke is two winding coils 3 and 7, which are shown provided with resistance 4 of press span or other insulating material. The iron core 1 and the windings 3 and 7 are completely encapsulated in a casing 12 of a hardenable artificial mass such as bakelite. For the production of the oil, the iron core with the windings surrounded by powdered food mass is placed in a press pad, which is difficult to heat. A press stamp is lowered and compresses the artificial mass into a casing 12 of such external shape, that the artificial mass casing directly serves as a cutter and that a special extra protective creation is thus a joke longer necessary. The thickness of the housing can be tilted around 2 mm in most stables. Its upper side Or provided with a shoulder 2, the surface of which is made substantially flat for pressing in the marking of the impedance. The cradle's cradle thickness exceeds the ford due to the mat about 2 mm in stalls and follows from these shells not quite the configuration of the baked goods. The spirits of the iron lamellae are provided with a continuous hall, into which a mandrel is inserted during baking. In this way, two screw halls 8 and 17 are obtained for the impedance of the impedance in the luminaire. The windings 3 and 7 are provided with coarse connection terminals 9, 10, 14 and 16 for the electrical connection of the impedance. These ropes are likewise baked with shin inner spirits, so that they are stuck viii in the hardened mass which has arisen when the cape is pressed. The underside of the PA canopy has longitudinal grooves 13 and 15 pressed in during the manufacture of the canopy. Be intended to be used for concealing Adana wires, which may be pulled past the impedance 1 saraband with the mounting in the luminaire. These savings can be conveniently delimited by breakable duct walls, - - whereby the outer part of the hood has a closed appearance in those cases (IA such savings do not need to be used.

Den under starkt tryck skeende hopgjutningen av kapan kunde befaras utsktta de av klen trad bestaende lindningarna for skadlig averkan. SA är emellertid ej fallet, troligen beroende pA att trycket blir relativt homogent fordelat. Genom inbakningen visar sig icke langre den hittills vanliga vakuumimpregneringen av impedansens lindningar erforderlig. De bultar och skruvar, som tidigare anvants far att hopsatta lamellpaketet, aro flu slopade, da det visar sig att lamellerna bli mycket effektivt sammanhallna inbordes vid inbakningen i konstmassan. The high-pressure compaction of the hood could be feared to expose the small winding existing windings to harmful effects. However, SA is not the case, probably due to the pressure being relatively homogeneously distributed. Due to the embedding, the hitherto usual vacuum impregnation of the windings of the impedance no longer proves necessary. The bolts and screws that were previously used to assemble the lamella package were not removed, as it turns out that the lamellae are very effectively held together when embedded in the artificial mass.

Claims

Patent claim:

Ballast impedance for electric discharge tubes for lighting purposes, challenge in the form of a choke or transformer embedded in an insulating mass, can be drawn by one of the slats carved out of lamellae and on this applied windings cast together without previous vacuum impregnation in a single, of hard and durable artificial mass shares a common embedding housing, which is assigned an outer design corresponding to a choke-oil transformer cap and which is provided with a screw halter or other fasteners and with molded connectors for impedance installation, the core lamellae being pulled inboard and joined to a lamella package.

Ballast impedance according to patent claim 1 with longitudinal grooves pressed into its underside for indentations of lines, which grooves are generally delimited by breakable duct walls. Stockholm 1950. Kungl. Boktr. P. A. Norstedt & Slitter 500969