milli-voltmeter, Weston DC model 1
Date1911
Inventory Number0438a
ClassificationVoltmeter
Subject
Maker
Weston Electrical Instrument Corporation
founded 1888
User
Department of Physics, Harvard University
founded 1884
Cultural Region
Place of Origin
Place of Use
Dimensions8.5 × 17 × 15 cm (3 3/8 × 6 11/16 × 5 7/8 in.)
blue board box: 10.8 × 39.4 × 40 cm (4 1/4 × 15 1/2 × 15 3/4 in.)
blue board box: 10.8 × 39.4 × 40 cm (4 1/4 × 15 1/2 × 15 3/4 in.)
Material
Accessoriesshunt (0438b)
DescriptionA voltmeter, housed in a fan-shaped metal case, engraved with a decorative pattern, mounted on a square wooden base. The base has two binding posts and a press button. The instrument has an arc-shaped display panel, through which a paper scale, arc-shaped reflecting strip and knife-edge instrument indicator may be seen. The instrument has a dual scale is marked 0-100 and 0-10-0.
Printed below the scale, "WESTON / DIRECT READING / MILLI-VOLTMETER." Two star designs are printed on either side of the company name.
A metal plaque is positioned on the face of the instrument, below the scale, which reads, "WESTON ELECTRICAL INSTRUMENT CO. / MODEL 1 NO. 8794 NEWARK, N.J." Another plaque reads, "PATENTED 1890."
The wooden base has two binding posts and a press-button.
Inside, and partly visible through a round display window, the instrument's indicator is attached to a moving coil and a horseshoe-shaped magnet.
Printed below the scale, "WESTON / DIRECT READING / MILLI-VOLTMETER." Two star designs are printed on either side of the company name.
A metal plaque is positioned on the face of the instrument, below the scale, which reads, "WESTON ELECTRICAL INSTRUMENT CO. / MODEL 1 NO. 8794 NEWARK, N.J." Another plaque reads, "PATENTED 1890."
The wooden base has two binding posts and a press-button.
Inside, and partly visible through a round display window, the instrument's indicator is attached to a moving coil and a horseshoe-shaped magnet.
Signedprinted below the scale: WESTON / DIRECT READING / MILLI-VOLTMETER;
on metal plaque on face of instrument: WESTON ELECTRICAL INSTRUMENT CO. / MODEL 1 NO. 8794 NEWARK, N.J.
Inscribedplaque: PATENTED 1890
Curatorial RemarksDated 1911. Date is stampled on back of scale, inside: Jul 31, 1911.
Date of latest patent is November 6, 1898, patent nos. 392386 and 392387.
FunctionFor detecting electrical current in a circuit in millivolts.
ProvenanceFrom the Jefferson Physical Laboratory, Harvard University. the blue triangle indicates that it was used for the Physics 3 course.
Weston Electrical Instrument Corporation
Date: 1900-1917
Accessories: wooden instrument case (0526d); shunts (0526b and 0526c)
Object number: 0526a
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: 1894
Accessories: Weston portable multiplier (0279b); standardization certificate on back of lid
Object number: 0279a
Weston Electrical Instrument Corporation
Date: 1890-1920
Object number: 0313
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
See also/See also
