Voltmeter

Physics

Accession Number: 2015.ph.688

Instrument Name: Voltmeter

Description:

A circular voltmeter mounted on a panel of wood, with three small control knobs below the face of the dial. The dial and controls are set in black painted metal, likely steel or iron.

The control knobs are marked with “+/-”, “150″, and “300″, corresponding to the two different voltage measurements on the dial.

Primary Materials: Steel, Wood, Glass, Metal (Other)

Markings:

On face of dial:
“PATTERN NO. 77 ALTERNATING CURRENT”
“VOLTS”
Logo bearing the name “JEWELL”

On control knobs: “+/-”, “150″, “300″

Inscribed lightly between the leftmost and middle control knob: “1074″

Dimensions (cm):

Length = 15cm, Width = 12.5 cm, Height = 9.5cm

Function:

Utilised to measure electrical potential difference between two points in an electrical circuit.

Condition:

Good, with some wear and tear. Minor scratching and peeling paint on the dial and the metal surrounding it, glass scratched. Dial is yellowing slightly. Discolored, slightly corroded screws and controls, some powdering on back of wood panel.

Manufacturer: Jewell Electrical

Donated to UTSIC: Yes