Accession No

2028

Brief Description

induction coil, Ruhmkorff type, by APPS, c.1895

Origin

433 Strand; London; England

Maker

APPS

Class

electrical

Earliest Date

1895

Latest Date

1895

Inscription Date

Material

wood; ivory; metal (brass); ebonite; cloth (velvet); ivorine

Dimensions

length 324mm; breadth 172mm; height 187mm

Special Collection

Cavendish collection

Provenance

Transferred from Cavendish Laboratory, University of Cambridge, 1974.

Inscription

‘NO. 1150
APPS,
433 STRAND
London.
PATD. 1881-264’ (ivorine plate on base)

Description Notes

Rectangular wooden base containing capacitor. Two pairs of brass terminals, one with shorting rod. Three-position ivory and brass commutator switch. Primary and secondary coils mounted on two ebonite standards; secondary coil covered with blue velvet. Oscillating Nieff hammer contact interruptor with adjustment screws, mounted on brass pillar.

Condition good; complete

References

Events