General Information

Serial #

14531

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

Steel body/ glass window/ paper scale.

Dimensions

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

Length

17.8 cm

Width

17.8 cm

Height

17.8 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

Period Used until approximately 1968, as before then the calibrations had been semi-annual.

Canada

Typical voltmeter used in Canadian industry.

Function

Measures voltage in volts.

Technical

Permanent magnet movable coil type DC flush type switchboard voltmeter. The square shape made it economical to place many of these meters side by side or on top of each other. The round shape which one often finds in switchboard meters is only used for aesthetic reasons or because the round shape is easy to manufacture. This square shape was probably only possible thanks to advances in working with sheet steel. This model is designed for affordability and so the case is simpler and less elegant than other voltmeters by the same manufacturer. The wide screen allows in a lot of light and makes the scale very visible from a distance. It is quite possible that voltmeters of this type were of standard use at schools and universities. This model is very similar to 1973.0473. This model measures direct current and the other one measures alternating current. Barring the scale, it is identical to 1973.0475.

Area Notes

Unknown

Details

Markings

On scale: 'VOLTS/ D.C./ WESTON/ MODEL 921/ No. 14531' ; '4' written on a piece of masking tape; On sticker: 'STANDARD CALIBRATION SEAL/ CAL. BY VC#15/ DATE 14 Dec 67/ DATE DUE 14 June 68'

Missing

N/A

Finish

Black metal housing. Gauge is numbered from 0 to 150 volts by 25's. Appears good.

Decoration

N/A