A.C. voltmeter, General Electric Co.
Date1909-1930
Inventory Number1997-1-0338
ClassificationVoltmeter
Subject
Maker
General Electric Company
1892-present
Cultural Region
Place of Origin
Dimensions14.3 × 30.9 × 22.7 cm (5 5/8 × 12 3/16 × 8 15/16 in.)
Material
DescriptionA square-shaped, hinged, latched wooden case with metal brackets to secure a carrying handle, but the handle is missing.
The instrument is housed in a black case. A curved, rounded display window shows a scale with a flat indicator, and without calibration marks, but with the words: "No. Type P" printed below.
The face of the instrument has three knobs, two on the left and one on the right. One on the left is labeled, "0" and on on the right is labeled "150"
The instrument is housed in a black case. A curved, rounded display window shows a scale with a flat indicator, and without calibration marks, but with the words: "No. Type P" printed below.
The face of the instrument has three knobs, two on the left and one on the right. One on the left is labeled, "0" and on on the right is labeled "150"
Signedbelow the display is a metal plaque inscribed: Voltmeter / Pat. June 1, 1908 / GENERAL ELECTRIC CO. / SCHENECTADY, N.Y. U.S.A.
Inscribedprinted on display: No. Type P
on a hemispherical protrusion below plaque, the General Electric logo: GE
FunctionVoltmeter for alternating current (A.C.). Unknown range as the scale has been removed.
Westinghouse Electric & Manufacturing Company
Date: 1952
Object number: 2003-1-0037
Weston Electrical Instrument Corporation
Date: 1894
Accessories: Weston portable multiplier (0279b); standardization certificate on back of lid
Object number: 0279a
Jewell Electrical Instrument Company
Date: 1915-1929
Object number: 1997-1-0324
General Electric Company
Date: late 19th-mid 20th Century
Accessories: multiplier ( 0271b)
Object number: 0271a
General Electric Company
Date: 1909-1930
Accessories: the inside of the lid contains two standardization certificates, one by A.S. Mancib (Somerville, MA), the other by Weston Electric (Newark).
Object number: 1997-1-1037
Weston Electrical Instrument Corporation
Date: 1920-1930
Accessories: standardization card from the A.S. Mancib Co.
Object number: WJ0951
Weston Electrical Instrument Corporation
Date: 1900-1930
Accessories: standardization certificate on inner surface of lid
Object number: 1997-1-1183
