H - Electricity – 01 – J
Patent
H - Electricity
01
J
H01J 61/02 (2006.01) H01J 9/52 (2006.01) H01J 61/20 (2006.01) H01J 61/72 (2006.01)
Patent
CA 2241693
A fluorescent lamp having an attachment mounted therein for reduction of soluble mercury contained in the lamp, and to act as a fail-safe at the end of lamp life, comprises a collar of iron mesh providing an iron surface area sufficiently large to reduce a portion of the soluble mercury to elemental mercury when the lamp is pulverized to granules and subjected to a suitable aqueous acid solution, such that a remaining portion of soluble mercury leachable is less than 0.2 milligram per liter of the aqueous acid solution, whereby to provide a substantially non-soluble mercury leachable lamp. The attachment is adapted for disposition around an electrode mount in the lamp and is electrically isolated from lead-in contacts in the mount, such that upon exhaustion of a cathode coating in the lamp, an electrical arc stream impinges on the attachment, causing the mount within the attachment to crack, whereby to provide for safe termination of operation of the lamp.
Cette invention concerne une lampe fluorescente comportant un accessoire pour réduire le mercure soluble contenu dans la lampe et assurer la sûreté de la lampe à la fin de sa durée de vie utile. Ledit accessoire est un manchon en toile de fer présentant une superficie suffisamment grande pour réduire le mercure soluble en mercure élémentaire lorsque la lampe est pulvérisée et que les fragments sont plongés dans une solution aqueuse acide appropriée, jusqu'à obtenir une concentration résiduelle de mercure soluble lixiviable inférieure à 0,2 milligramme par litre de solution aqueuse acide. L'accessoire se pose autour de la monture de l'électrode dans la lampe et il est isolé des entrées de courant dans la monture. Ainsi, lorsque le revêtement cathodique de la lampe est épuisé, l'arc électrique atteint l'accessoire, causant la rupture de la monture et, de ce fait, la mise hors service de la lampe.
Boyce Craig S.
Evans Tyra N.
Shinn Dennis B.
Sweetland Michael D.
Tuttle Billy W.
Fetherstonhaugh & Co.
Osram Sylvania Inc.
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