Accession No

3090

Brief Description

moving magnet, pointer galvanometer, late 19th Century

Origin

Maker

Class

electrical

Earliest Date

1875

Latest Date

1900

Inscription Date

Material

wood; metal; brass; wire; cloth; glass

Dimensions

height 120mm; breadth 90mm; depth 65mm

Special Collection

Steward collection

Provenance

Collection purchased from member of the Steward family, 1974.

Inscription

‘Resistance at 60˚ F
Between Terminals 1 + 2, .45 ω
“ “ 1 + 3, 489.88 ω’ (inside back cover)

Description Notes

Rectangular wooden box; hinged back; three brass terminals marked ‘1’, ‘2’, ‘3’ and brass carrying ring on top; circular glazed window on front, showing silvered dial; scale 0 - 90˚ - 0, numbered by 10˚, graduated to 1˚; vertical magnetic pointer. Hand written paper label on inside of hinged door on back gives coil resistances between terminals.

Complete

Also known as ‘Lineman’s Detector’.

References

Events