Accession No

2293

Brief Description

magneto-electric machine; circa 1855

Origin

Maker

Class

medical

Earliest Date

1855

Latest Date

1855

Inscription Date

Material

wood (pine, mahogany, at least one other); metal (steel, brass, copper); rope (cord); cloth (velvet); plastic; hide (leather); glass

Dimensions

length 277mm; breadth 173mm; height 129mm

Special Collection

Provenance

Purchased from Magdalene Street Gallery, Cambridge, England, 16/2/1977.

Inscription

‘IMPROVED
MAGNETIC INDICATOR.’ (scale on lid of box)

Description Notes

Mahogany box containing blue-painted steel horseshoe magnet. Brass framework for two arbors: one, rotated by a crank and turned wooden handle, carries a cog wheel, the other a pinion and pulley wheel with a plastic drive loop to an axle carrying two velvet-covered coils, which rotate close to the poles of the magnet. Two cord-covered wires lead to turned hardwood handles and cylindrical brass terminals. Knurled screw on side of box leads to gear system on underside of lid which moves index arm on circular glazed scale set on lid of box; this scale is divided [0] - 100, numbered by 10, subdivided to 1.

Condition good; complete.

References

Events