Accession No

2978

Brief Description

double-pivotted coil Delezenne circle, by Philip Harris and Company Ltd., English, 1915 (c)

Origin

England; Birmingham

Maker

Philip Harris and Company Ltd.

Class

electrical; demonstration

Earliest Date

1915

Latest Date

1915

Inscription Date

Material

wood; metal (brass, copper, white metal); cloth (silk); plastic (ivorine)

Dimensions

length 551mm; breadth 198mm; height 584mm

Special Collection

Provenance

Donated by Department of Physics, Guy’s Hospital Medical School, University of London, London, England, 1983.

Inscription

‘PHILIP HARRIS & CO. LTD.
BIRMINGHAM,
ENGLAND.’ (ivorine disc set into base)
‘No. 47
400 T’ (underside of base)

Description Notes

Circular copper coil (400 turns) in wooden former pivoted within square wooden frame. Turning handle at one side of pivot and brass ring with brass split-ring commutator. Electrical contact brushes and brass terminals at the other. Squarer frame itself pivoted on horizontal axis, supported by 2 wooden standards mounted on wooden base. Silvered dial at end of each axis divided 0 - 90 - 0 - 90 - 0 numbered by 10˚ subdivided to 1˚.

Condition good; incomplete (pointers on each axis, terminal nuts missing)

References

Events