Direct Current Voltmeter

Psychology

Accession Number: 2011.psy.33

Instrument Name: Direct Current Voltmeter

Description:

A square brown wooden voltmeter covered in leather which stands vertically. The instrument has a small semi-circular display, with a glass cover, ranging from 0-150 volts. There are three terminals at the top marked “+”, “15″, “-150″.

Alternative Name:

Primary Materials: wood; leather, glass, metal

Markings:

On the front, there is a University of Toronto paper label and a metal manufacturer’s brass label reading “N.C.S. Nalder Bros & Thompson Ltd.; Dir. Cur. Voltmeter”. Another manufacturer’s label above the display scale reads “Chapman & Walker Ltd, Toronto, Canada; No. 92111″.

Dimensions (cm): Height = 22, Width = 9, Length = 17

Function:

A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit.

Condition:

Poor. The leather is suffering from red rot (degradation process found in vegetable-tanned leather) all over.

Associated Instruments: 2011.psy.10; 2011.psy.32

Manufacturer:

Chapman & Walker Ltd, Toronto, Canada; N.C.S. Nalder Bros & Thompson Ltd.

Date of Manufacture:

Provenance:

Dept. of Psychology, University of Toronto

Donated to UTSIC: No

Historical Notes: