Recording voltmeter
Object No. H6579
Recording voltmeter, leather / wood / metal / glass / paper, J H Holmes & Co, Newcastle, England, date unknown
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Summary
Physical Description
Recording voltmeter, J H Holmes & Co, Newcastle-on-Tyne, UK Materials: leater / wood / metal / glass / paper
PRODUCTION
Notes
The maker, a company started by John Henry Holmes, was an early manufacturer of electric dynamos. Holmes also invented the standard 'make or break' light switch. Murday's patent made chart recordings easier to read by making the time axis linear rather than curved.
HISTORY
Notes
The voltmeter was used for teaching and/or research at the University of Sydney.
SOURCE
Credit Line
Gift of J Brown, 1959
Acquisition Date
7 September 1959
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