Accession No

3320

Brief Description

portable quadrature transformer, sumpner type, by General Electric Company Ltd., English, 1908

Origin

England; Salford

Maker

General Electric Company

Class

electrical

Earliest Date

1908

Latest Date

1908

Inscription Date

Material

metal (brass, copper); plastic (ebonite); wood; paper (card); rope (string)

Dimensions

length 203mm; breadth 200mm; height 158mm

Special Collection

Provenance

Transferred from Department of Engineering, University of Cambridge, Cambridge, England, 1986.

Inscription

on card inside lid: “PORTABLE QUADRATURE TRANSFORMER No. 101.K / FOR USE WITH WATTMETER No. 101W / ... / THE GENERAL ELECTRIC CO. LTD. / SALFORD”
On top of lid (added): “1169”

Description Notes

Ten threaded brass terminals mounted on ebonite top (copper wires join four pairs of terminals ); in wooden box with hinged, locking wooden lid and carrying handle. Blue-printed card screwed to inside of lid, showing circuit diagram (single primary and four secondary coils) and giving maximum currents. Key tied to handle with string.

References

Events