Accession No

3237

Brief Description

recorder, strip (ammeter), attributed to Evershed and Vignoles Ltd., English 1900-1925 (c)

Origin

England; London [based on attributed maker]

Maker

Evershed and Vignoles Ltd. [attributed]

Class

electrical

Earliest Date

1900

Latest Date

1925

Inscription Date

Material

wood; metal (brass, other); hide (leather); glass

Dimensions

height 525mm; breadth 215mm; depth 180mm

Special Collection

Provenance

Transferred from Institute of Astronomy, University of Cambridge, Cambridge, England, 1985. Cambridge University Observatories.

Inscription

‘RECORDING AMMETER
MURDAY SYSTEM
DIRECT CURRENT
No. 750851’ (on plate on door)

Description Notes

Upright rectangular wooden box on metal base; leather carrying handle; hinged and locking door with glazed window; three pairs of terminals on top, for current input, lamp power and recorder power respectively; pivoted coil D’Arsonval galvanometer with three-piece upright horseshoe magnet in upper section of box; pointer extends vertically downwards to continuous chart recorder, electrically driven, in lower section; zero adjustment lever; air damping chamber; white dial with scale, 0 to 5 milliamperes; pointer clamp; brass lamp socket. With door key.

Condition: good (coil pivot intact); incomplete (maker’s nameplate, pen and lampbulb missing).

References

Events