Accession No

2112

Brief Description

small induction coil Ruhmkorff type by Newton and Co., 1sy 1/4 20th century

Origin

3 Fleet Street; London; England

Maker

Newton and Co.

Class

electrical

Earliest Date

1900

Latest Date

1925

Inscription Date

Material

wood; metal (brass); ivory; plastic (ebonite, ivorine)

Dimensions

length 238mm; breadth 134mm; height 134mm

Special Collection

Provenance

Transferred from Institute of Astronomy, University of Cambridge, Cambridge, England, 10/1975.

Inscription

‘APPS’ PATD COIL
MADE BY
NEWTON & Co.
OPTICIANS TO THE QUEEN
3, FLEET ST., LONDON.
No. 628 N.’ (ivorine plate on base)
‘AST LAB
170
S.P.O.
181’ (on ebonite standard)

Description Notes

Rectangular wooden box containing capacitor. 1 pair of brass terminals marked ‘N’ and ‘P’. 2 position ivory and brass switch. Primary and secondary coils mounted on to ebonite standards and covered with ebonite sheath. Oscillating Nieff hammer contact interruptor with adjustment screw mounted on brass standard.

Condition fair (secondary coil terminals, or discharge rod posts, broken); incomplete

References

Events