direct current voltmeter
Date1890-1910
Inventory Number0206
ClassificationVoltmeter
Subject
Maker
Deprez et Carpentier
founded 1878
User
Harvard University Department of Physics
founded 1726
Cultural Region
Place of Origin
Dimensions6.4 × 12.8 × 16.8 cm (2 1/2 × 5 1/16 × 6 5/8 in.)
box: 8.3 × 15.9 × 15.2 cm (3 1/4 × 6 1/4 × 6 in.)
box: 8.3 × 15.9 × 15.2 cm (3 1/4 × 6 1/4 × 6 in.)
Material
DescriptionA direct current voltmeter, consisting of a moving magnet above 2 hemispheric coils (ea. 1" dia.), attached to a vane. 2 D-shaped magnets for zero adjustment are seen on back of instrument. Resistance is stated as 2120+. The instrument is in a cylindrical brass case with a glass cover (cover is missing). The instrument has two posts, one on either side, protruding from the side of the case. Similar to #0207.
The instrument display is inscribed in French. The scale goes from 0-120v in increments of 10.
The instrument display is inscribed in French. The scale goes from 0-120v in increments of 10.
Signedprinted on instrument display: Deprez et Carpentier
Inscribedon face, under scale: VOLTS_MÈTRE / Deprez et Carpentier / Bté - s.g.d.g. / F. Carpentier. Ingr. Constr. / Paris / N° 1701 / Resistance 2120 ohms;
also marked: L. Carpentier Ingr. Constr. Paris no. 1701
FunctionInstrument for measuring D.C. voltage.
Historical AttributesPhysics Dept.
Weston Electrical Instrument Corporation
Date: late 19th Century
Accessories: two shunts (#0270b and #0270c); special leads
Object number: 0270a
Weston Electrical Instrument Corporation
Date: circa 1914
Accessories: multiplier in case of instrument; standardization certificate from the Weston Laboratory, Newark, N.J. Feb.1914 on lid of wooden case
Object number: 0278
Weston Electrical Instrument Corporation
Date: 1911
Accessories: shunt (0438b)
Object number: 0438a
Department of Physics, Harvard University
Date: 1920-1930
Object number: 0208
Westinghouse Electric & Manufacturing Company
Date: 1952
Object number: 2003-1-0037
Weston Electrical Instrument Corporation
Date: late 19th Century
Accessories: 0269b (which is a multiplier for 0269a)
Object number: 0269a
Weston Electrical Instrument Corporation
Date: circa 1925
Accessories: shunt (0531b); box of 6 screws, two modified bolts, and one small piece of wood (all these originally housed in petri dish, now transferred to archival box)
Object number: 0531a