voltmeter
Datecirca 1930
Inventory Number0508
ClassificationVoltmeter
Subject
Maker
General Electric Company
1892-present
User
Blue Hill Meteorological Observatory
1885-present
Cultural Region
Place of Origin
Place of Use
Dimensions10.3 × 20.5 × 21.7 cm (4 1/16 × 8 1/16 × 8 9/16 in.)
Material
DescriptionA voltmeter, housed in a rectangular wooden box with an inset circular, textured metal faceplate. The faceplate has an arc-shaped display window, through which a double scale and knife-edge shaped instrument indicator may be seen. The instrument scales are labeled 0-750 and 0-150. Below the instrument scale is an arc-shaped mirrored strip.
Signedon rectangular metal plaque: VOLTMETER / GENERAL ELECTRIC CO. / SCHENECTADY, N.Y. U.S.A.;
Inscribedadditional printing on scale: Type DP2 no. 231083 / Pat. June 1, 1909 June 13, 1911 / N.P. 7796; on metal support brackts: NP7796, 281962, FS;
FunctionA standard voltmeter for rather large voltages, up to 750. It may have been used in meteorology-related research at the Blue Hill Meteorological Observatory.
ProvenanceFrom the Blue Hill Meteorological Observatory, May 1960.
Weston Electrical Instrument Corporation
Date: 1911
Accessories: shunt (0438b)
Object number: 0438a
General Electric Company
Date: late 19th-mid 20th Century
Accessories: multiplier ( 0271b)
Object number: 0271a
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
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: late 19th Century
Accessories: two shunts (#0270b and #0270c); special leads
Object number: 0270a
Jewell Electrical Instrument Company
Date: 1915-1929
Object number: 1997-1-0324
Weston Electrical Instrument Corporation
Date: 1894
Accessories: Weston portable multiplier (0279b); standardization certificate on back of lid
Object number: 0279a
