direct current milliammeter
Date: 1890-1910
Inventory Number: 0454
Classification: Ammeter
Subject:
Maker: G. Gaiffe fils (fl. 1887 - 1910s)
User: Radiation Laboratory of the Massachusetts Institute of Technology (1940 - 1945)
Associate Name: Adolphe Gaiffe (1832 - 1887)
Cultural Region:
Place of Origin:
City of Use:
Dimensions:
10 × 10.3 × 4.1 cm (3 15/16 × 4 1/16 × 1 5/8 in.)
blue board box: 11.4 × 38.4 × 31.1 cm (4 1/2 × 15 1/8 × 12 1/4 in.)
Description:
Direct current milliammeter consisting of a round, black metal frame with two terminals protruding from the bottom. The dial on the face is calibrated with zero in the center and 200 milliamperes on either side.
The face is black with white lettering, and a small thin needle points to the current value on the linear scale.
The face is black with white lettering, and a small thin needle points to the current value on the linear scale.
Signedon face: A. GAIFFE À PARIS / G. GAIFFE FILS SUCCESSEUR
Inscribedon face: Galvanomètre Apériodique Milliampères. / R= 4 (omega) 76 / 106794
FunctionMeasures direct currents by way of a moving long coil in a u-shaped magnet with a string on a small pulley mounted on a spool on the point shaft. A small inclination of the coil therefore moves the pointer over a considerable arc.
Curatorial RemarksAlso marked "Galvanomètre Apériodique Milliampères."
ProvenanceFrom the Department of Physics, Cruft Student Laboratory, Harvard University, 1965.