Renseignements généraux

Nº de série

S/O

Nº de partie

34

Nombre total de parties

38

Ou

S/O

Brevets

S/O

Description générale

Glass tube coated with white phosphor/ metal parts/ synthetic parts

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

101,5 cm

Largeur

S/O

Hauteur

S/O

Épaisseur

S/O

Poids

S/O

Diamètre

1,9 cm

Volume

S/O

Lexique

Groupe

Technologie d'éclairage

Catégorie

Ampoules

Sous-catégorie

S/O

Fabricant

Ou

General Electric

Pays

Inconnu

État/province

Inconnu

Ville

Inconnu

Contexte

Pays

Amérique du Nord

État/province

Inconnu

Période

circa 1950+

Canada

An example of a lamp bulb used in Canada, part of a large and varied collection of over 7500 electrical items acquired and documented by Ontario Hydro in the 1960s. The collection was thought to be the largest and most comprehensive of its kind in Canada and was donated to the Canada Science and Technology Museum in 1992

Fonction

A device used to provide illumination by means of an electric current which excites mercury vapour in a glass tube, producing short-wave ultraviolet light that then creates fluorescence, producing visible light.

Technique

Deluxe bulbs were created in 1949 to enhance the quality of white light by using improved red phophors. The Deluxe Cool White simulated the colour-rending effects of natural daylight. Slimline lamp bulbs were first designed in 1945 to add to the elegance of fluorescent lighting systems and eliminate the preheat requirement. Slimline bulbs were instant-start type, that required no starter switches and lowered the cost of maintenance. To allow for an instant start, the lamp bulb contained a loose overwind of fine (0.7 mil.) tungsten wire added to a coil of modified dimensions. The overwind performed a double function. First, it reduced sputtering time by rapidly reaching the emitting temperature when the arc first struck; and second, it acted as a 'basket' to hold a large quantity of emission material tightly. When the first lamps of this design were manufactured, they were affected by end discolouration. This problem was resolved in 1947 by using a cathode shield made of nickel or iron. Instant-start type bulbs required no starter switches, lowering the cost of maintenance. To allow for an instant start, the lamp bulb contained a loose overwind of fine (0.7 mil.) tungsten wire added to a coil of modified dimensions. The overwind performed a double function. First, it reduced sputtering time by rapidly reaching the emitting temperature when the arc first struck; and second, it acted as a 'basket' to hold a large quantity of emission material tightly. When the first lamps of this design were manufactured, they were affected by end discolouration. This problem was resolved in 1947 by using a cathode shield made of nickel or iron.

Notes sur la région

Inconnu

Détails

Marques

Gold lettering on glass reads '42" T6 GE [logo] DELUXE COOL WH'

Manque

Appears complete

Fini

White tube/ metallic and black end caps

Décoration

S/O