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WESTON ELECTRIC METERS, 1918
The calibration certificate for the ammeter is for Serial No 30940 ?
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The meter shown is Serial No 23602.
The Voltmeter is dated 13 Jan 1920.
British-born American Chemist who revolutionized the Electro-plating industry, founded the Weston Electrical Instrument Company. A prolific inventor who held 334 patents, Edward Weston May 9, 1850 – August 20, 1936 helped revolutionize the measurement of electricity.
Weston's son, Edward Faraday Weston also received several patents regarding exposure meters.