Renseignements généraux

Nº de série

1880

Nº de partie

1

Nombre total de parties

1

Ou

S/O

Brevets

S/O

Description générale

Cast-iron body/ glass window/ red felt.

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

25,4 cm

Hauteur

27,9 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

Weston

Pays

United States of America

État/province

New Jersey

Ville

Newark

Contexte

Pays

Inconnu

État/province

Inconnu

Période

Inconnu

Canada

Typical voltmeter used in Canadian industry. Appears to have been used in a power station.

Fonction

Measures DC voltage in volts.

Technique

Permanent magnet movable coil type DC illuminated dial station voltmeter. This is a switchboard voltmeter for use in the electrical industry. It helped regulate the flow of electricity in the early days of the 20th century. The large black pointer is perforated. There is also a mobile normal index. When the normal index covers the hole in the pointer, the switchboard operator sees a solid black pointer from far away. When the measured current deviates from the normal operating conditions, a partial or full white circle becomes visible. Thus a quick scan of many switchboard instruments can detect any problems. A front-mounted knob controls the dot. In earlier versions of this model, the pointer was a solid arrow and the normal index was a black triangle that pointed slightly lower than the scale. (see ref. 2) This instrument can be illuminated using incandescent bulbs placed behind it. This allowed the reading to be seen more easily in the often badly lit switchboard rooms. It also increased visibility from far away even if the room lighting was adequate. It is magnetically shielded.

Notes sur la région

Inconnu

Détails

Marques

On face: 'WESTON STATION VOLTMETER/ No. 1880 [stamped in]/ MADE BY/ WESTON ELECTRICAL INSTRUMENT CO./ NEWARK. N.J., U.S.A.'

Manque

S/O

Fini

Black japan finish, brass flashing, red felt.

Décoration

S/O