Voltmeter / Ammeter, E-1

A dial that showed how many amps or volts were flowing in an aircraft's electrical system.

Maker

Westinghouse

Place

United States of America

Materials

Steel, Non-Magnetic Metal Alloy, Glass, Paint, Cadmium Plating

Dimensions

3-D (Diameter x Depth): 8.3 × 5.1cm (3 1/4 in. × 2 in.)

Museum

National Air and Space Museum

Credit line

Transferred from the U.S. Air Force

3-1/4in.dia.; range 0-300 amps; WW2; type e-1; pos. and neg.poles

The museum's own record (Smithsonian, National Air and Space Museum)

Also answering “What is the electricity doing?” see all

Leyden Jar BatteryFessenden electrolytic radio signal detectorGeneral Radio type 726-A vacuum tube voltmeterWheastone Bridge