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Fluorescent lighting faces the biggest boom in its four-year existence (estimated sales for 1942: 40 million tubes). Recently the infant industry's 37-year-old James L. Cox, Hygrade Sylvania Corp. engineer, announced the demise of a technical "bug" that has been lurking in the luminescent tubes: the unpredictable "lumen slump" (blackened end-bands, dark streaks and splotches) that afflicts many lamps. Cox's bug killer: a technique for dosing each lamp with the exact amount of mercury needed for adequate ultraviolet radiation...

Author: /time Magazine | Title: Science: Fluorescent Bombing | 4/27/1942 | See Source »

...mercury "bomb" is spot-welded to one cathode and is exploded by heat applied just before the fluorescent tube is sealed, thus releasing mercury vapor into the argon-filled lamp. Twofold result, claimed by Hygrade Sylvania: 1) stable performance of every tube; 2) savings of up to 50% of mercury previously wasted...

Author: /time Magazine | Title: Science: Fluorescent Bombing | 4/27/1942 | See Source »

...most of its 40 years in the lighting business, Hygrade Sylvania Corp. has lived off scraps from other people's patent tables. It has not been a bad living. Hygrade has missed no dividend since 1921, earned $856,807 on an $11,022,424 gross last year. But last week Hygrade directors began to move out from under the table. Gathered in their Salem, Mass, office, they voted $250,000 (or more if needed) for a new factory. Its product-to-be: fluorescent lighting, in which Hygrade owns basic patents...

Author: /time Magazine | Title: MANUFACTURING: Hygrade Out from Under | 5/13/1940 | See Source »

Still pushing, the Poors went into radio tubes, on license from R. C. A. A merger with Sylvania Products Co. in 1931 got them 100% more tube capacity, also Hygrade Sylvania's present president, bespectacled Benjamin Erskine (who owned Sylvania). Now Hygrade is the No. 2 tube maker, but pays 5% royalties to the No. 1 maker...

Author: /time Magazine | Title: MANUFACTURING: Hygrade Out from Under | 5/13/1940 | See Source »

...radio tube advertisement in her January copy of the magazine QST, she took a magnifying glass to the tiny glyphs under a headline GOOD NEWS! Shocked, she tattled to her postmaster that she had discovered something far from dull. He called in the Federal Bureau of Investigation. Hygrade Sylvania Corp., which made the tubes, shifted the blame to its advertising agency. The agency communicated hotly with the commercial studio which drew the ad. The studio hotly pounced on a cynical free-lance artist it had hired to do the actual drawing. , but he publicly denied he sketched what the Massachusetts...

Author: /time Magazine | Title: Press: GOOD NEWS! | 1/17/1938 | See Source »

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