A.C. voltmeter, laboratory standard
Datelate 19th-mid 20th Century
Inventory Number0271a
ClassificationVoltmeter
Subject
Maker
General Electric Company
1892-present
User
Harvard Engineering School
1918 - 1951
Cultural Region
Place of Origin
Place of Use
Dimensions14.5 × 43.3 × 40.3 cm (5 11/16 × 17 1/16 × 15 7/8 in.)
Material
Accessoriesmultiplier ( 0271b)
DescriptionA voltmeter housed in a brass, fan-shaped case with a gun metal finish, mounted on a square wooden base. The base has 5 binding posts - 2 marked, "resistance or line", 3 marked "line and resistance." The base rests on 5 brass legs, 2 of which are adjustable. The instrument has an arc-shaped curved display window, through which a printed scale, marked 0 - 150, may be seen. There is a thin, movable indicator.
Signedplaque on top of meter: GENERAL ELECTRIC CO. SCHENECTADY N.Y. U.S.A.;
Inscribedprinted on meter scale: No. 337238 / TYPE PL2 / PAT. JUNE 1 1909;
Curatorial RemarksOld Nos: "HARVARD UNIVERSITY 1229"
FunctionVoltmeter for alternating current.
ProvenanceFrom the Harvard Engineering School. Removed to this collection: 11/56.
Weston Electrical Instrument Corporation
Date: late 19th Century
Accessories: 0269b (which is a multiplier for 0269a)
Object number: 0269a
Weston Electrical Instrument Corporation
Date: 1894
Accessories: Weston portable multiplier (0279b); standardization certificate on back of lid
Object number: 0279a
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
Weston Electrical Instrument Corporation
Date: late 19th Century
Accessories: two shunts (#0270b and #0270c); special leads
Object number: 0270a
Weston Electrical Instrument Corporation
Date: 1911
Accessories: shunt (0438b)
Object number: 0438a
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: 1900-1917
Accessories: wooden instrument case (0526d); shunts (0526b and 0526c)
Object number: 0526a
See also/See also
