Renseignements généraux

Nº de série

S/O

Nº de partie

1

Nombre total de parties

1

Ou

S/O

Brevets

S/O

Description générale

ceramic cup & switch handle/ metal plate & parts

Dimensions

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

Longueur

11,5 cm

Largeur

7,0 cm

Hauteur

5,3 cm

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Énergie-électrique

Catégorie

Site d'utilisateur

Sous-catégorie

S/O

Fabricant

Ou

Diamond

Pays

United States of America

État/province

Inconnu

Ville

Inconnu

Contexte

Pays

Amérique du Nord

État/province

Inconnu

Période

circa 1913+

Canada

An American made switch of a type used in Canadian households. 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 make or break a connection in an electrical circuit, specifically in domestic lighting.

Technique

An example of a rotary switch. Edison was one of the very first to give serious attention to the question of the branch switch. Out of the many possible movements, he chose that of turning, partly through its association with the gas tap. He thought that it would be a good selling point to allow his customers to turn electricity on or off in the same manner as they were accustomed to dealing with gas. From 1880 to 1890 the great majority of switches were of the turn type (Ref. 3). First they were made of wood, with no definite on or off positions. Later switch bases were made of marble or slate, then porcelain with definite on-off positions. Another improvement was quick-make-and-break mechanisms. Rotary switches remained popular in Canada until the late 1920s, but gradually were used more in stoves & other appliances than lighting. By 1921 they no longer appeared in Canadian catalogues. Diamond H, previously named the Hart Mfg. Co., was a company formed by American Waldo Hart in 1890. The first push-button switch made by Hart & Co. appeared in 1899. By 1915 Diamond had become part of Hart & Hegeman. (Ref. 1)

Notes sur la région

Inconnu

Détails

Marques

incised logo on switch handle consists of "H" enclosed in diamond./ identical logo on underside of cup/ handwritten on ceramic is "HALLIDAY/STONEY CREEK/ ADA/ SEE MEMO/ APR 13/65"

Manque

appears complete

Fini

white ceramic/ plated metal

Décoration

S/O