D.C. Voltmeter

Physics

Accession Number: 2009.ph.162

Description:

The voltmeter is mounted on a wooden base, and is also attached to a vertical board at the back for support. The voltmeter itself is black. Above the last inscriptions is a small circular knob, and above that is a small plate detailing patent information. The top of the face is dominated by a large scale, with two numerical scales; one runs from 0-6, and the top scale runs from 0-120. The white backing plate of the scale has split and been repaired. Immediately behind the scale is a light bulb, ostensibly for illuminating the scale. The top of the voltmeter has an after-market label reading “D.C. VOLTS”. There are numerous battery terminals on the rear of the voltmeter, with after-market labels reading “NEGATIVE” or “POSITIVE”. The two negative terminals are further marked “6 Volts” and “120 Volts”.

Alternative Name:

Primary Materials: Wood, Metal, Glass

Markings:

Old inventory number = phy1027A-C. The face of the voltmeter has “WESTON STATION VOLTMETER, NO. 10752”, “MADE BY WESTON ELECTRICAL INSTRUMENT CO., NEWARK, N.J., U.S.A.” written on it with patent information written above this. The back projection of the voltmeter has a metal label reading “Weston Elec. Inst. Corp., Newark, N.J., U.S.A., MULTIPLIER”, “Type 31”, “Max. Volts 130”, “Model 33”, “No. 10752”.

Dimensions (cm): Height = 37, Width = 33, Length = 30

Function:

Measuring voltage in electric current; possibly a demonstration device

Condition:

Good. The white backing plate of the scale has split and been repaired. The metal is slightly corroded and the wooden base and backing is nicked and dented in places.

Associated Instruments:

Manufacturer:

Weston Electrical Instrument Company, Newark, New Jersey, USA.

Date of Manufacture: Early 20th Cent.

Provenance:

University of Toronto Department of Physics

Historical Notes: