Accession No

2780

Brief Description

induction coil, Du Bois-Reymond type, by Cambridge Scientific Instrument Company Ltd., English, c. 1900

Origin

England; Cambridge

Maker

Cambridge Scientific Instrument Company Ltd.

Class

electrical

Earliest Date

1900

Latest Date

1900

Inscription Date

Material

wood (boxwood); plastic (ebonite) metal (brass); cloth; ivory

Dimensions

length when closed 560mm; height when closed 178mm; length when open 1120mm; height when open 135mm; breadth 77mm

Special Collection

Provenance

Transferred from Department of Botany, University of Cambridge, Cambridge, England, 03/09/1981.

Inscription

‘SCIENTIFIC
INSTRUMENT CO, LTD
CAMBRIDGE.
NO 1147’ (ivory plaque at one end of instrument)

Description Notes

Black-painted wooden baseboard, hinged in middle, with channel for sliding secondary coil. 91.7cm boxwood scale with millimetre divisions on one side of base plate. Primary coil fixed to wooden support at one end with electromagnetic contact breaker, adjustment and five brass terminals. Secondary coil mounted on wooden bobbin which slides in channel in baseboard and can pass over the primary coil. Two brass terminals on secondary coil. With two insulated electrical leads connected to a spark gap with ebonite handle (not original).

Condition good; complete

References

Events