SE190850C1

SE190850C1 -

Info

Publication number: SE190850C1
Authority: SE
Publication date: 1964-01-01

Description

Uppfinnare: G W Gressman Prioritet begard frau den 29 oktober 1954 (USA) Foreliggande uppfinning hark& sig hell allmant till sadana blixtlampor for fotografiska andama.1, som besta av en ljusgenomslapplig kolv, i vilken ett 1511 antandligt ,metalliskt material fir inneslutet tillsammans med ett lampligt medel for antandning av det metalliska materialet och en forbranningen underhallande gas, som vid lampans tandning reagerar med det brannbara materialet under momentant utsandande av aktivt ljus med hog intensitet. Inventor: GW Gressman Priority Required from October 29, 1954 (USA) The present invention generally applies to such flashlights for photographic spirits.1, as consisting of a light transmissive flask in which a 1511 flammable metallic material is enclosed together with a lamp. means for igniting the metallic material and a gas entertaining during combustion, which on ignition of the lamp reacts with the combustible material during instantaneous emission of active light of high intensity.

Narmare bestamt avser foreliggande uppfinning en tandsats for sadana blixtlampor. Uppfinningen är sarskilt anvandbar vid blixtlampor av .miniatyrtyp, vilka innehalla aluminium eller aluminium-magnesiumlegering i form av tradar eller band. More particularly, the present invention relates to a set of teeth for such flash lamps. The invention is particularly applicable to miniature type flash lamps which contain aluminum or aluminum-magnesium alloy in the form of wires or ribbons.

Den vanligen anvanda typen av tandsats faster icke alltid pa onskat salt vid upphangnings- eller intagstradarna, och detta fir i synnerhet fallet vid miniatyrlampor, dvs. lampor med en inre volym av mindre an cm3, mars kolvar aro forseglade vid basen. Under framstallningen av sadana vid basen forseglade lampor upptrader i tandsatsens narhet jamfOrelsevis hOga temperaturer, 'slam ibland fororsakar partiell forbranning av tanchatsens biindemedel. Ehuru det finns hindemedel med saval battre varmebestandighet som god bindning vid intagstradarna, aro manga ay dessa olampliga, enar man med dessa lake kan uppna den onskade tid-ljuskaraktfiren at lampan. En annan svarighet Sr att jamnt fordela tandsatsen i bindemedlet, dvs. att cietta joke avdunstar eller hardnar for snabht. The commonly used type of tooth set does not always adhere to the desired salt at the suspension or intake lines, and this is especially the case with miniature lamps, ie. lamps with an internal volume of less than cm3, March flasks aro sealed at the base. During the manufacture of such lamps sealed at the base, comparatively high temperatures occur in the vicinity of the tooth set, sludge sometimes causing partial combustion of the adhesive of the tooth set. Although there are inhibitors with saval better heat resistance as good bonding at the intake lines, aro manga ay these unlucky, one agrees with these lake can achieve the desired time-light character at the lamp. Another responsibility is to evenly distribute the tooth set in the binder, ie. that cietta joke evaporates or hardens too quickly.

Ett 5.ndamfil med foreliggande uppfinning ar alltsa att astadkomma en tamisats med god formaga att binda vid upphangningstraden i den fardiga blixtlampan ()eh som joke ofordelaktigt paverkar lampans ljuskaraktar. A steam file with the present invention is thus to provide a tamis set with good shape to bind to the hanging line in the finished flash lamp () eh as a joke adversely affects the light character of the lamp.

Foreliggande uppfinning i enlighet med patentanspraken innebar i all korthet, att till ett normalt tandsatsmaterial sattes en ii-ten mangd ay ett lampligt harts, foretradesvis silikonharts, vars sonderdelningstemperatur ligger Over 350° G, varigenom man uppnar battre bindning vid lampans intagstrad, speciellt i fraga om yid basen forseglade miniatyrlampor under bibehalen Onskad tid-ljuskaraktar. In short, the present invention according to the patent claims meant that a normal amount of dental material was added to a normal dental set material, preferably a lamp resin, preferably silicone resin, the probe division temperature of which is above 350 ° C, thereby achieving better bonding at the lamp inlet line, especially in question. about yid base sealed miniature lamps while maintaining Unwanted time-light characters.

Ytterligare andamal och fordelar med foreliggande uppfinning framga ay fOljande beskrivning. Further objects and advantages of the present invention will become apparent from the following description.

Som exempel antages att lampans antandningstrad bestar av en kort, rak (Doh tuna volframtrad (diameter lampligen av storleksordningen 18 ,a) fastsatt vid de inre andarna av lampans intagstradar och att volframtraden, dar den Sr fast vid intagstradarna, Sr overdragen med en tandsats i form av parlor, som antandas, nar tandtraden upphettas. Tfindsatsen anbringas pa intagstradarna och tandtraden i form av en pasta bestiende av extremt lattantandligt metallpulver och ett lampligt, pulverformigt oxidationsmedel i blandning med ett bindemedel. By way of example, it is assumed that the ignition wire of the lamp consists of a short, straight (Doh thin tungsten wire (diameter approximately of the order of 18, a) attached to the inner spirits of the lamp inlet lines and that the tungsten wire, where it is attached to the inlet wires, The insert is applied to the inlet wires and the dental floss in the form of a paste consisting of extremely light-toothed metal powder and a light, powdery oxidizing agent in admixture with a binder.

De hittills kanda lampligaste och mest vanliga tandsatserna for blixtlampor ay den typ, som liar tradformigt brannbart material av huvudsakligen rent aluminium, inneliSlia i blandning finpulveriserat magnesium, zirkonium och kaliumperklorat sammanbundet med ett lampligt bindemedel, exempelvis en 2-5 %-ig losning ay cellulosanitrat i amylacetat. Om tandtraden Sr av en diameter av storleksordningen 18 u aro de foredragna relativmangderna av ovannamnda pulverbestandsdelar 60-90 % zirkonium, 1-8 % magnesium och 9-35 % kaliumperklorat. The most suitable and most common dental kits for flash lamps of the type known today, which are traditionally combustible material of mainly pure aluminum, in particular a mixture of finely powdered magnesium, zirconium and potassium perchlorate combined with a suitable binder, for example a 2-5% solution of cellulose anite and amyl acetate. If the dental floss Sr is of a diameter of the order of 18 μ, the preferred relative amounts of the above-mentioned powder constituents are 60-90% zirconium, 1-8% magnesium and 9-35% potassium perchlorate.

Enligt uppfinningen har det visat sig, att en tillsats av en liten mangd ay ett 15mpligt varmebestandigt harts till en sfidan tandsats, 2— - f5r1finar denna en Mitre vidhaftning vid lam-pans intagstrad, utan att lampans ljuskaraktar ogynnsamt paverkas. According to the invention it has been found that an addition of a small amount of a suitable heat-resistant resin to a soft tooth set, this refines a miter adhesion to the lamp inlet line, without adversely affecting the light character of the lamp.

Namna harts kan atlas till tandsatsen i form av en losning i ett lampligt organiskt losningsmedel. Hartset b8r icke Tara sadant, att det sanderdelas vid snabb upphettning till en temperatur av c:a 3° C, till vilken ternperatur tandsatsen vanligen upphettas nfir vid basen forseglade miniatyrlampor tillslutas. For andamalet ha foljande hartser befunnits vara lfimpliga: shellack, glyptalhartser (reaktionsprodukter av polybasiska syror och polyalkoholer) urinamneformaldehydharts (Beetle harts) eller fenolfurfural och fenolformaldehydharts (Durite harts). Named resin can be atlased to the tooth set in the form of a solution in a suitable organic solvent. The resin should not be tared in such a way that it is sanded on rapid heating to a temperature of about 3 ° C, to which temperature the set of teeth is usually heated before the miniature lamps sealed at the base are closed. For the purpose, the following resins have been found to be suitable: shellac, glyptal resins (reaction products of polybasic acids and polyalcohols), urea name formaldehyde resin (Beetle resin) or phenol furfural and phenol formaldehyde resin (Durite resin).

Det Er emellertid lampligast att anvfinda ett silikonharts lost i ett lampligt organiskt losningsmedel, exempelvis de losningar som i handeln tillhandahallas av General Electric Company under beteckningarna SR-17 och SR-82 silikonhartslosningar. SR-17 fir en c:a 50 %-ig laming (dvs. c:a 50 viktprocent fasta hartsbestandsdelar och 50 viktprocent lasningsmedel) av ett metylfenylpolysiloxanbarts i toluen. I delta harts aro saval metylgrupper som fenylgrupper bundna vid kisel med kolkiselbindningar. SR-82 fir en c:a 60 %-ig losning (dvs. c:a 60 viktprocent fasta hartsbestandsdelar och 40 viktprocent losningsmedel) av ett metylsilikonharts i xylen, i vilket harts alla de organiska grupper, som aro bundna vid kisel medelst kolkiselbindningar, aro metylgrupper. However, it is most convenient to use a silicone resin solution in a suitable organic solvent, for example the solutions commercially provided by General Electric Company under the designations SR-17 and SR-82 silicone resin solutions. SR-17 contains about 50% laminating (ie about 50% by weight of solid resin constituents and 50% by weight of lasing agent) of a methylphenylpolysiloxane bar in toluene. In delta resin aro saval methyl groups such as phenyl groups bonded to silicon with carbon silicon bonds. SR-82 comprises an approximately 60% solution (ie about 60% by weight of solid resin constituents and 40% by weight of solvent) of a methylsilicone resin in xylene, in which resin all the organic groups which are bound to silicon by means of carbon silicon bonds, aro methyl groups.

Normalt innehaller 1000 mg torr tandsats enligt uppfinningen ungefar 0,25-15 mg varmebestandigt harts. Mangden hartslosning av varmebestandigt harts, som maste sattas till tandsatsblandningen far att dari infora ovanna.mnda hartsmangd, ar sjalvfallet beroende pa hartslosningens koncentration. Om 18sningen innehaller minst 50 viktprocent harts, maste man saledes darav till tandsatsblandningen satta frau c:a 0,5 till c:a 30 mg pa totalt 1000 mg torra tandsatsbestandsdelar. Under framstallningen av blixtlampor avdunstar lasningsmedlen far nitrocellulosan och tillsatsbindemedlet, varfor i de slutliga parlorna endast de fasta bestandsdelarna I bindemedlen kvarsta. Normally, 1000 mg of dry denture according to the invention contains about 0.25-15 mg of heat-resistant resin. The amount of resin solution of heat-resistant resin, which must be added to the dentifrice mixture before introducing the above-mentioned amount of resin, is of course dependent on the concentration of the resin solution. If the solution contains at least 50% by weight of resin, it must thus be added to the denture mixture from about 0.5 to about 30 mg of a total of 1000 mg of dry dentifrice components. During the production of flash lamps, the lasers evaporate the nitrocellulose and the additive binder, so that in the final beads only the solids in the binders remain.

Tandsatsen enligt uppfinningen irmehfiller saledes lampligen fOljande bestandsdelar viktprocent Zirkoniumpulver42-90 Magnesiumpulver1-26 Kaliumperkloratpulver 9- Torrt cellulosanitrat0,15-0, Extra tillsatt harts0,025-1, mom ovan angivna koneentrationsgranser har faljande tandsats befunnits vara sarskilt fordelaktig viktprocent Zirkoniumpulver60-90 Magnesiumpulver Kaliumperkloratpulver 9- Torrt cellulosanitrat0,15-0, Extra tillsatt harts0,05-0,7 Magnesium och kaliumperklorat inga i tandsatsen i extremt finfordelad form, foretradesvis med en kornstorlek av 44 A (325 mesh) och finare. Zirkoniumpulvret kan daremot ha en kornstorlek av storleksordningen 0,177 nun (80 mesh) och finare. Som zirkoniumpulver anvandes heist det som gar i handeln under beteckningen No. 3 grade Iran Foote Mineral Company, Philadelphia, 'Pennsylvania, USA. Nfimnda No. 3 grade zirkoniumpulver har en relativt hog antandningstemperatur (Over 170° G) i jamforelse med andra former av zirkoniumpulver. Magnesiumpulvret Sr foretradesvis det som framstalles av United States Magnesium Company i Pleasant Valley, New York, under beteckningen »325 mesh magnesium powder». Kemiskt rent kristalliserat kalitunperkloratpulver anvandes som oxidations medel i tandsatsblandningen. The denture according to the invention thus conveniently contains the following constituents weight percent Zirconium powder42-90 Magnesium powder1-26 Potassium perchlorate powder 9- Dry cellulose nitrate0.15-0, Extra added resin0.025-1, VAT above stated concentration limits 9- Dry cellulose nitrate0.15-0, Extra added resin0.05-0.7 Magnesium and potassium perchlorate none in the denture in extremely finely divided form, preferably with a grain size of 44 A (325 mesh) and finer. The zirconium powder, on the other hand, may have a grain size of the order of 0.177 nun (80 mesh) and finer. As zirconium powder, heist used in trade under the designation No. 3 degree Iran Foote Mineral Company, Philadelphia, 'Pennsylvania, USA. Nfimnda No. 3 degree zirconium powder has a relatively high ignition temperature (Over 170 ° G) compared to other forms of zirconium powder. The magnesium powder is preferably that produced by the United States Magnesium Company in Pleasant Valley, New York, under the designation "325 mesh magnesium powder". Chemically pure crystallized potassium perchlorate powder was used as oxidizing agent in the dentifrice mixture.

Tandsatsmaterialet anbringas pa de inre andarna eller spetsarna av intagstradarna i form av en pasta eller suspension av pulverpartiklarna i de bada bindemedelslosningarna. Det primara bindemedlet Sr sadant att det hailer partiklarna fullstandigt dispergerade i hela suspensionen och Or den la.mplig Tor bearbetning. Som bindemedel anvandes foretradesvis en Ifigprocentig (c:a. 1,5-4 %) lasning av cellulosanitrat i amylacetat, foretra.desvis en som innehaller c:a 1,2-1,3 viktprocent fasta bestandsdelar och har en viskositet av 50-55 sekunder i en No. 7 du Pont bagare vid ° C. The dentifrice material is applied to the inner spirits or tips of the intake wires in the form of a paste or suspension of the powder particles in the two binder solutions. The primary binder Sr such that it heals the particles completely dispersed throughout the suspension and Or den la.mplig Tor processing. As the binder, an Ifig% (about 1.5-4%) charge of cellulose nitrate in amyl acetate is preferably used, preferably one which contains about 1.2-1.3% by weight of solid constituents and has a viscosity of 50-. 55 seconds in a No. 7 du Pont baker at ° C.

Efter avdunstningen av bindemedlens losningsmedel aterstar harda parlor pa intagstradarna bestaende nfistan enbart av zirkonium, magnesium, kaliumperklorat och bindemedlens fasta bestandsdelar. After evaporation of the binder solvents, hard beads remain on the intake lines consisting only of zirconium, magnesium, potassium perchlorate and the solid constituents of the binders.

En. sadan mangd cellulosanitratlosning anvandes att pastan far den for bildning av parlor av larnplig storlek erforderliga konsistensen. Anvandes ovannfimnda speciella cellu, llosanitratlosning, som bestar av cellulosanitrat i amylacetat med c :a 1,2-1,3 viktprocent fasta bestfindsdelar, uppgar den anvanda mingden primar bindemedelslosning till c:a 15-30 viktprocent av totala mangden torra tandsatsingredienser. Ett specifikt exempel pa en tandsatspasta enligt uppfinningen, som befunnits ge sarskilt tillfredsstalla.nde resultat, dr foljande: Zirkoniumpulver 4916 g Magnesiumpulver 58» Kaliumperkloratpulver 223 — —a Cellulosanitrat lost i amylacetat (1,2-1,3 % fasta bestandsdelar) 200 ml SR-82 silikonhartslosning8,2 g Tandsatspastan kan framstallas pa foljande salt. De angivna mangderna magnesiumoch zirkoniumpulver blandas forst grundligt med en del av den angivna mangden cellulosanitratlOsning, sá att man erhaller en tunn pasta. Darvid tillsattes losningen med na.gra fa milliliter i taget till zirkoniummagnesiumblandningen och inblandas grundligt efter vane tillsats. Den aterstaende delen av cellulosanitratlOsningen sattes darefter pa samma salt till kaliumperkloratpulvret. Den sa na kloratpastan sattes till forstnamnda blandning och blandas dari grundligt och darefter tillsattes och inblandas den angivna mangden extra hartslosning. One. such a large amount of cellulose nitrate solution is used that the paste has the consistency required for the formation of pearls of larval size. If the above-mentioned special cellulose solution, cellulose nitrate solution, which consists of cellulose nitrate in amyl acetate with about 1.2-1.3% by weight of solid constituents, is used, the amount of primary binder solution used amounts to about 15-30% by weight of the total amount of dry dentifrice ingredients. A specific example of a dentifrice paste according to the invention which has been found to give particularly satisfactory results is as follows: Zirconium powder 4916 g Magnesium powder 58 »Potassium perchlorate powder 223 - a Cellulose nitrate dissolved in amyl acetate (1.2-1.3% solids) 200 ml SR-82 silicone resin solution8.2 g The toothpaste can be prepared from the following salt. The stated amounts of magnesium and zirconium powder are first thoroughly mixed with a portion of the stated amount of cellulose nitrate solution to obtain a thin paste. The solution was added a few milliliters at a time to the zirconium-magnesium mixture and mixed thoroughly as usual. The remaining portion of the cellulose nitrate solution was then added to the same salt of the potassium perchlorate powder. The said chlorate paste was added to the former mixture and mixed therein thoroughly, and then the specified amount of extra resin solution was added and mixed in.

Enligt foreliggande uppfinning erhalles en tandsatsblandning, som sakert faster vid lam-pans intagstradar, aven em den utsattes for en temperatur av 350° C. En sadan fast bind-fling av tandsatsen sakrar den onskade tidljuskaraktaren hos blixten. Att enbart utbyta det vanligen anvanda cellulosanitratet mot ett varmebestandigt harts av ovan beskrivet slag medfor icke goda resultat, ty med enbart de extra hartslosningar, som anvandas enligt 15- religgande uppfinning kan man icke dispergera tandsatspartiklarna i hela ,pastan eller suspensionen pa for andamalet tillrackligt likformigt satt, vilket dhremot an mojligt med cellulosanitratlosningen. Ej heller skulle den erforderliga langa bearbetningstiden uppnas med sadana hartslOsningar. According to the present invention, a set of teeth is obtained which securely adheres to the intake lines of the lamp, even if it is exposed to a temperature of 350 ° C. Such a firm bonding of the set of teeth secures the desired time light character of the flash. Replacing only the commonly used cellulose nitrate with a heat-resistant resin of the type described above does not give good results, because with only the extra resin solutions used according to the present invention it is not possible to disperse the denture particles in the whole, the paste or the suspension sufficiently uniform. which is possible with the cellulose nitrate solution. Nor would the required long processing time be achieved with such resin solutions.

Claims

Patent claim:

Dental kit for flash lamps containing zirconium, magnesium and potassium perchlorate in powder form in an organic binder, characterized in that the binder consists of a mixture containing frail about 0.15 to about 0.40% by weight of a non-heat resistant binder on Iran about 0.025 to about 1.5% by weight of another heat-resistant adhesive when heated to about 350 ° C, calculated on the total weight of the tooth set.

Dental kit according to claim 1, characterized in that the heat-resistant adhesive component consists of a silicone resin.

Dental kit according to claim 1 or 2, characterized in that it contains 42-90% by weight of zirconium, 1-26% by weight of magnesium and 9-40% by weight of potassium perchlorate and that the non-heat-resistant binder consists of air cellulose nitrate

Dental kit according to any of the preceding patent claims, characterized in that it contains Iran about 60 to about 90% by weight of zirconium, Iran about 1 to about 8% by weight of magnesium and from about 9 to about 35% by weight of potassium perchlorate and from about 0.05 to about 0.05 , 75% by weight heat-resistant binder.

Dental kit according to any one of the preceding claims, characterized in that it is Millis of a mixture of about 496 g of zirconium, about 58 g of magnesium, about 223 g of potassium perchlorate, about 200 ml of a from about 1.2 to about 1.3% by weight. solid ingredients containing solution of cellulose nitrate in amyl acetate and about 8.2; g of a 60% silicone resin solution. Request Publications: U.S. Patent Application. 2,178,430 and 2,280,598.