Accession No

4189

Brief Description

Wheatstone Bridge, Callendar and Griffiths (students pattern) type I, made by the Cambridge Scientific Instrument Company Ltd., English, c. 1905

Origin

Cambridge; England

Maker

Cambridge Scientific Instrument Company Ltd.

Class

electrical

Earliest Date

1905

Latest Date

1905

Inscription Date

Material

Wood; Plastic (ebonite); Metal (brass)

Dimensions

length 419mm; breadth 146mm; height 110mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

“THE CAMBRIDGE SCIENTIFIC INSTRUMENT CO. LTD. / CAMBRIDGE ENGLAND No. 3807 / INTERNATIONAL OHMS / T.R.No. 1” (on top)

Description Notes

Wheatstone Bridge, Callendar and Griffithes (students pattern) type I; made by the Cambridge Scientific Instrument Co., c. 1905;
Seven resistance coils; seven brass and ebonite plugs; coils marked from 2 to 160 international ohms (each coil differs by 3 ohms from the ‘C’ and ‘B’ respectively; single slide wire with 30-cm brass scale; sliding brass cursor with spring-loaded contact; wooden case with ebonite top;

Condition: complete

References

Events