General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

Steel body/ glass window/ paper scale/ metal binding posts.

Dimensions

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

Length

N/A

Width

6.3 cm

Height

3.9 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

FF

Country

United States of America

State/Province

Unknown

City

Unknown

Context

Country

North America

State/Province

Unknown

Period

1925-1940

Canada

Typical ammeter used in Canadian industry.

Function

Measures DC current in Amperes. Used to measure the charge and discharge rate in a wet cell power system.

Technical

Panel DC Ammeter for battery testing, probably iron vane (movable iron) mechanism because of the cheapness of the instrument (KE – notes). The ammeter was a dashboard instrument that became a standard feature in the 1920s (Gardiner and Morris: 38). Ammeters measure the electricity in the automobile’s electrical system. This type of device was used in automobiles, mounted on the dashboard to indicate current levels when the generator was charging the battery and also when feeding current to lighting and accessory systems (discharging) (KE – notes: 1997.0729.001). Ammeters measure electric current in amperes, which is a unit of measurement named after the French physicist Andre-Marie Ampere (Britannica Educational Publishing: 215).

Area Notes

Unknown

Details

Markings

Printed on face: 'CHARGING RATE/ DISCHARGE CHARGE/ TRADE F-F MARK/ PAT'D MAR. 11, 1924'

Missing

N/A

Finish

Case front, black wrinkle enamel. Back, black gloss enamel.

Decoration

N/A