The ammeter is a metal cylinder with an attached metal bottom with a key-shaped hole for hook on one side. The face is covered with a glass cover. The face has an short arc-shaped scale at the top, and a needle fixed to a dial in the centre of the instrument. The scale runs from 0-3, although under the scale it has been penciled with numbers and does not correspond to the factory numbers. The needle is fixed to a point in the middle of the face. On either side of the cylinder is a threaded electrical terminal with a nut.
Accession Number: 2009.ph.172
Alternative Name: Ampere Meter
Metal: Copper Alloy, Metal: Iron Alloy, Glass, Paper
Old inventory number = phy367. On the face, between the needle and the scale is handwritten: “Amperes-Metre”, “Deprez et Carpentier”, “Bte s.g.d.g.” Below the needle is written “J. Carpentier, Jngr. Constr.”, “Paris”, “J6 (?) 10400.”
Dimensions (cm): Height = 6.5 cm, Diameter = 12.5 cm
A device used to measure electrical current (in amps) in an electrical circuit.
Good: The metal surface of the exterior of the instrument is oxidized and dulled, and marked with scratches. The base is also oxidized and scratched. The glass cover is cracked across one side, and dirty across the surface. The face is marked with dark marks around the rim. Pencil markings under the scale recalibrate the original measurement.
Associated Instruments:
Manufacturer: Deprez & Carpentier, Paris, France
Date of Manufacture: 1878-c.1900
From the collection of Professor Martin Lee.
Additional Information and References:
Historical Notes: