Accession No

1316

Brief Description

suspended magnet, pointer, astatic galvanometer, second half of 19th Century

Origin

Maker

Class

electrical

Earliest Date

1850

Latest Date

1900

Inscription Date

Material

metal (brass, magnet, other); plastic (ivorine), hide (leather); cloth; wood

Dimensions

case height 186mm; diameter 144mm

Special Collection

Provenance

Inscription

on fabric label: “No. 27 / Galvanscop [sic] in leather case”.

Description Notes

Circular brass base; three levelling feet; four brass terminals on ivorine plates; two coils wound on rectangular wooden former; white paper two piece dial screwed on top of former; two brass posts support the central suspension of two oppositely-polarized horizontal magnets, one with coils and one , as pointer, above dial; circular scale marked by quadrant in degrees; painted metal cylindrical cover with glass top. Brass base-plate screws to case to provide central mounting socket. In leather carrying case. With hand lettered, fabric label.
Good condition (suspension broken, leather carrying strap broken); incomplete (top of leather case missing)

References

Events