Accession No

4635

Brief Description

suspended coil electrical pointer meter by Siemens, late 19th/early 20th C.

Origin

London; England

Maker

Siemens

Class

electrical

Earliest Date

1890

Latest Date

1920

Inscription Date

Material

wood; glass; metal (brass, mercury, 2 others); ceramic (porcelain)

Dimensions

height 317mm; diameter of base 205mm

Special Collection

Provenance

Donated on 25/07/1997.

Inscription

‘SIEMENS BROS. & CO. LTD
LONDON
NO. 5974’ (dial)
‘THE PROPERTY OF THE
CAMBRIDGE
ELECTRIC SUPPLY CO., LTD.’ (metal plaque screwed onto base)

Description Notes

Circular wooden base with three brass levelling feet and three brass terminals marked ‘1’, ‘2’ and ‘3’. Scratched into the base is ‘2 = 6’ and ‘0 = 2’ in between the terminals. Brass clamping mechanism operated by knurled brass screw on base. Wooden standard supporting single fixed coil. Circular white porcelain dial on top of standard with full circle divided 0 - [400], numbered by 10, divided to 1. Metal pointer connected to secondary coil via suspending spring and shaft. One cup in centre of base holds mercury for electrical connection to moving coil. Cylindrical glass cover with glazed wooden top.

Condition good; complete

References

Events