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/ brass

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

5,2 cm

Épaisseur

S/O

Poids

S/O

Diamètre

6,7 cm

Volume

S/O

Lexique

Groupe

Énergie-électrique

Catégorie

Site d'utilisateur

Sous-catégorie

S/O

Fabricant

Ou

Inconnu

Pays

Inconnu

État/province

Inconnu

Ville

Inconnu

Contexte

Pays

Canada

État/province

Inconnu

Période

circa 1890 - 1915

Canada

An example of a ceiling rosette of a type used in Canada. Part of a large and varied collection of over 7500 electrical items acquired and documented by Ontario Hydro in the1960s. The collection was thought to be the largest and most comprehensive of its kind in Canada and was donated to the National Museum of Science and Technology in 1992.

Fonction

An electrical wiring device used to provide a means of connecting electrical wires coming from the wiring system of a building into a single wire or cable and also to provide a decorative cover from which this wire can emerge.

Technique

An example of a porcelain ceiling rosette of the early 20th century. According to Mellanby (Ref. 2), no sooner had the rose been invented than it was also used to house a fuse, an exceedingly inconvenient arrangement. However this helped to draw attention to the need for a better material than wood, and china soon became the standard material. The familiar china screw-on cover was one of the earliest innovations due to the General Electric Co. During the 1990s, porcelain barriers were added between the poles. While the normal rose provided a reasonably efficient method of connecting a pendant. In most domestic installations its use was confined to the bedrooms and 'usual offices', the more ornamental fittings in sitting rooms being provided with metal ceiling plates which were considered to be better looking.

Notes sur la région

Inconnu

Détails

Marques

largely illegible raised lettering on underside reads in part "C R1", possibly "U.S.A."

Manque

appears complete

Fini

glazed off-white porcelain

Décoration

S/O