Accession No

4054

Brief Description

phonic wheel, by Cambridge Scientific Instrument Company Ltd., English, 1914

Origin

England; Cambridge

Maker

Cambridge Scientific Instrument Company Ltd.

Class

sound

Earliest Date

1914

Latest Date

1914

Inscription Date

Material

wood; metal

Dimensions

box length 197mm; breadth 92mm; height 101mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

‘THE CAMBRIDGE SCIENTIFIC INSTRUMENT CO Ltd
CAMBRIDGE ENGLAND No. 25777’ (terminal support)

Description Notes

Instrument enclosed in wooden case with hinged lid and two hook fasteners. In the base of the case at the right hand side is a dry cell battery. Above this is an electric motor with two pairs of terminals and the armature of the motor is geared down and a small contact is let in a ring in the spindle of the large gear. This contact closes the circuit through a small electromagnet in the bottom of the case at the LHS.

References

Events