Renseignements généraux

Nº de série

S/O

Nº de partie

1

Nombre total de parties

1

Ou

S/O

Brevets

S/O

Description générale

porcelain shell/ copper/ wax

Dimensions

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

Longueur

S/O

Largeur

S/O

Hauteur

3,5 cm

Épaisseur

S/O

Poids

S/O

Diamètre

4,0 cm

Volume

S/O

Lexique

Groupe

Énergie-électrique

Catégorie

Site d'utilisateur

Sous-catégorie

S/O

Fabricant

Ou

General Electric

Pays

United States of America

État/province

Inconnu

Ville

Inconnu

Contexte

Pays

Amérique du Nord

État/province

Inconnu

Période

1920s

Canada

An example of an American made receptacle of a type used in Canada. Part of a large & varied collection of over 7500 electrical items acquired & documented by Ontario Hydro in the 1960s. The collection was thought to be the largest & most comprehensive of its kind in Canada & was donated to the National Museum of Science & Technology in 1992.

Fonction

An electrical wiring device used to provide a point at which power can be drawn from a wiring system by means of a plug .

Technique

An example of a receptacle of circa 1920. A simple arrangement which did not require the service of a mechanic to change a lamp was a necessity for commercial production of electric lamp sockets & receptacles. In 1880 Edison introduced the screw cap which still bears his name. Porcelain bodies were first made around 1907 & were efficient but broke easily, & so were mainly used in domestic settings rather than for industrial & street lighting purposes (Ref. 2). Edison had the idea for a light socket while screwing the cap on a kerosene can. It has the advantage of firmly seating the bulb without having to snap, pull or otherwise jar the lamp and its delicate filament. There were rival lamps before 1900, each with its own base, but Edison's base had 70% of the market in the early 1900s (Ref. 3). There were various standardized sizes of bases in use for lamps. For the screw base, there was the mogul (the largest), the medium, the intermediate & the candelabra (for smaller bulbs).

Notes sur la région

Inconnu

Détails

Marques

raised lettering around edge reads "G.E. CO.", "U.S.A.", "75W.", "125V"/ raised lettering on underside reads "CAT.107675"

Manque

appears complete

Fini

glazed white porcelain/ gold coloured metal

Décoration

S/O