Accession No

2603

Brief Description

Aryton and Perry’s variable standard inductor by Nadler Brothers, 1900–1910

Origin

London; England

Maker

Nadler Brothers

Class

electrical

Earliest Date

1900

Latest Date

1910

Inscription Date

Material

wood (mahogany (?)); metal (brass, white metal); glass; plastic (ebonite, one other); cloth (cotton)

Dimensions

height 341mm; breadth 329mm; depth 329mm

Special Collection

Provenance

Donated by Imperial College, London, England, 1980.

Inscription

‘PROFS. AYRTON & PERRY’S
STANDARD OF SELF INDUCTION
NALDER BROS. & CO.
LONDON
NO. 5969’ (dial)

Description Notes

Rectangular wooden base; wooden standards and formers support a vertical circular coil and a concentric coil which rotates through 180˚ about a vertical axis. Circular, horizontal silvered dial on top of coils and two brass pillars; dial with brass frame and glass top; ebonite knob connected to rotating coil and horizontal brass pointers. One half of dial divided 0 - 180˚, numbered by 10˚, subdivided to 1˚; other half with scale of millihenries divided [3] - [43], numbered by 5, subdivided to 1. Two-position brass switch under dial connecting coils in series or parallel. Four brass and ebonite terminals on ebonite plate on wooden standard.
Paper label attached to one brass pillar: ‘Rotor’ on obverse; diagram on reverse illustrating the switching between parallel and series circuits.

Condition good; complete.

References

Events