AC and DC voltmeter
Date1890-1905
Inventory Number0421
ClassificationVoltmeter
Subject
Maker
Stanley Electric Manufacturing Company
1890 - 1905
User
Department of Physics, Harvard University
founded 1884
Cultural Region
Place of Origin
Place of Use
Dimensions21.8 × 21.5 × 9.2 cm (8 9/16 × 8 7/16 × 3 5/8 in.)
Material
DescriptionA voltmeter in a cylindrical brass case with a beveled glass cover and brass bezel. The instrument display has an arc-shaped scale occupying the top half of the display, marked 0-150 in increments of 10. A needle indicator is attached to a center pivot point.
Inside of the instrument is described as having a hat wire movement, spring tension and magnet damping line.
Description from original card: "Round brass blackened frame for switchboard surface mounting, bevelled, glass with gold lettering and brass legged. Hat wire movement and spring tension, magnet damping disc; scale paper 5 1/2" 0-150 Volts; cramped 0-40."
Inside of the instrument is described as having a hat wire movement, spring tension and magnet damping line.
Description from original card: "Round brass blackened frame for switchboard surface mounting, bevelled, glass with gold lettering and brass legged. Hat wire movement and spring tension, magnet damping disc; scale paper 5 1/2" 0-150 Volts; cramped 0-40."
Signedprinted on glass: STANLEY MFG. CO / PITTSFIELD MASS. / U.S.A.;
Inscribed
printed below instrument scale: VOLTMETER / FOR / ALTERNATING OR DIRECT CURRENT / NO. 1799 PAT'D APRIL 1895
FunctionVoltmeter for alternating or direct current.
ProvenanceFrom the Physics Department, Harvard University. Lyman Laboratory. 3/16/61.
Weston Electrical Instrument Corporation
Date: 1911
Accessories: shunt (0438b)
Object number: 0438a
Westinghouse Electric & Manufacturing Company
Date: 1890-1930
Object number: RS0517
Westinghouse Electric & Manufacturing Company
Date: 1952
Object number: 2003-1-0037
General Electric Company
Date: late 19th-mid 20th Century
Accessories: multiplier ( 0271b)
Object number: 0271a
Weston Electrical Instrument Corporation
Date: late 19th Century
Accessories: 0269b (which is a multiplier for 0269a)
Object number: 0269a
