Renseignements généraux

Nº de série

4208

Nº de partie

1

Nombre total de parties

1

Ou

S/O

Brevets

S/O

Description générale

Wood base/ Working pieces are made of metal (copper, steel, and brass).

Dimensions

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

Longueur

26,0 cm

Largeur

23,0 cm

Hauteur

12,5 cm

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Énergie-électrique

Catégorie

Mesurage

Sous-catégorie

S/O

Fabricant

Ou

General Electric

Pays

Inconnu

État/province

Inconnu

Ville

Inconnu

Contexte

Pays

Inconnu

État/province

Inconnu

Période

Inconnu

Canada

Very early switchboard ammeter. Possibly made by Canadian General Electric Company.

Fonction

To measure current.

Technique

Early Thomson-Houston instruments used with complete switchboard set-up. As their name implies the meter is an "indicator" of amperes in the circuit but accurate enough for the purpose intended: this type of ammeter was connected directly into a circuit of 2,200 volts without the use of an insulating current transformer; the meter was part of the a complete Thomson-Houston system including alternator switchboard, with control system and transformers; a frequency of 125 cycles was used at the time, late 1880s and early 1890s.

Notes sur la région

Inconnu

Détails

Marques

Mfr. plate reads: "CURRENT INDICATOR/ NO. 4208/ CAPACITY 40 AMPERES/ PATENTED OCT. 22, 1889./ GENERAL ELECTRIC CO./ THOMSON-HOUSTON SYSTEM" Obverse side of attached 'provenance' tag reads: "Ammeter/ MD 31-17/ from: G.C. Allen, Sarnia, Ontario/ #184/ mfr'd by: Canadian General Electric Company/ gift of: [space left blank]/ current indicator (ammeter); Thomson-Houston sy???m [probably 'system']/ #4208; reads 0-40 amp; General Electric Company;/ patented October 22, 1889; contained in wood case and/ arranged for mounting on a switchboard; as their name/ implies the meter is an "indicator" of amperes in the/circuit but accurate enough for the purpose intended; this/ type of ammeter was connected directly into a circuit of" Reverse side of attached 'provenance' tag reads: "2,200 volts without the use of an insulating current/ transformer; the meter was part of a complete/ Thomson-Houston system including alternator/ switchboard, with control system and transformers;/ a frequency of 125 cycles was used at the time, late 1880's and early 1890's." Marking scratched into back of ammeter reads: "125 Cycles"

Manque

S/O

Fini

Inconnu

Décoration

S/O