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History of Science Museum

AC Ammeter, by Elliott Brothers, London, 1909

Inventory Number 12859


Acknowledgement: © History of Science Museum, University of Oxford, inv.12859

Item type
Object
Provenance
Presented by the Marconi Corporation in 2003.
Primary inscriptions
'No. 23243 / ELLIOTT BROTHERS / LONDON / ALTERNATING CURRENT / AMMETER'
Object type
Electronic instrument
Dimensions
Height: 152mm Width: 237mm Depth: 230mm Weight: 3.25kg
Inventory No
12859
Accession Number
2003-11

Description

This Alternating Current Ammeter is built into a wooden, square hinged box. There is a blueprint of connections on the underside of the lid - presumably for reference when using the ammeter, there is handwritten numbers on this blueprint. The ammeter scale/dial sits in a Bakelite surface and has a glass face. The current reads '0-100'. There are 2 Bakelite Amp knobs and 1 brass and Bakelite Short Circuit knob. Blueprint in lid.