General Information

Serial #

1880

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

Cast-iron body/ glass window/ red felt.

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

N/A

Width

25.4 cm

Height

27.9 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Energy-electric

Category

Measurement

Sub-Category

N/A

Manufacturer

AKA

Weston

Country

United States of America

State/Province

New Jersey

City

Newark

Context

Country

Unknown

State/Province

Unknown

Period

Unknown

Canada

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

Function

Measures DC voltage in volts.

Technical

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.

Area Notes

Unknown

Details

Markings

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

Missing

N/A

Finish

Black japan finish, brass flashing, red felt.

Decoration

N/A