Accession No

1301

Brief Description

Dr Simpson’s electro-magnetic apparatus for philosophical and medical purposes, by Macaulay and Son, English, 1842

Origin

England; Yorkl 39 Redeness Street

Maker

Macaulay and Son

Class

electrical; demonstration

Earliest Date

1842

Latest Date

1842

Inscription Date

1842

Material

wood; metal (brass, steel); paper; rope (string)

Dimensions

diameter of base 198mm; height 190mm

Special Collection

Cavendish collection

Provenance

Transferred from the Cavendish Laboratory, University of Cambridge. Part of the Stokes collection.

Inscription

‘Dr. Simpson’s
ELECTRO-MAGNETIC
APPARATUS,
For Philosophical & Medical Purposes.
Manufactured solely by
MACAULAY AND SON,
39, Redeness Street, YORK.’ (paper label on base)
‘A. Macaulay
York No 13
March 9th 1842’ (MS on underside of base)

Description Notes

Circular wooden base with four brass feet. Circular groove for cover (?). Six brass terminals on base. Inverted U-shaped electromagnet with bundle of steel wires as core. Rotor coil pivoted on vertical axis rotates within gap of electromagnet. Rotor has split-ring commutator.

Condition fair; incomplete (cover missing?)

References

Events