multiplier for A.C-D.C. portable voltmeter
Datecirca 1900
Inventory Number0279b
ClassificationMultiplier
Subject
Maker
Weston Electrical Instrument Corporation
founded 1888
User
Harvard Engineering School
1918 - 1951
Cultural Region
Place of Origin
Place of Use
Dimensions13.5 × 16.4 × 16.4 cm (5 5/16 × 6 7/16 × 6 7/16 in.)
Material
AccessoriesWeston portable voltmeter, item 0279a
DescriptionThis instrument (0279b), a multiplier, is designed to work with the Weston Direct Reading Voltmeter (instrument 279a). Multipliers may be contained in the voltmeter case, but external multipliers, calibrated for a particular instrument, may also be used.
The instrument is cylindrical, and consists of a perforated metal cylinder topped by a flat, disk-shaped wooden top and base. The top has two binding posts, a push button and two metal brackets securing a leather handle.
The instrument is cylindrical, and consists of a perforated metal cylinder topped by a flat, disk-shaped wooden top and base. The top has two binding posts, a push button and two metal brackets securing a leather handle.
Signedplaque on side: MULTIPLIER / FOR WESTON'S / ALTERATING & DIRECT CURRENT / VOLTMETER / NO. 867 / MADE BY THE WESTON ELECTRICAL INSTRUMENT CO. / NEWARK N.J. U.S.A.
Inscribedplaque on top: HARVARD UNIVERSITY 683;
Curatorial RemarksMultiplier marked "No 867" HARVARD UNIVERSITY 683.
FunctionMultipliers are used to extend the range of voltmeters.
This one is for use with a Weston A.C./D.C. portable voltmeter.
This one is for use with a Weston A.C./D.C. portable voltmeter.
ProvenanceFrom the Harvard Engineering School. Removed to this collection 11/56.
General Electric Company
Date: late 19th-mid 20th Century
Accessories: for voltmeter (0271a)
Object number: 0271b
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: late 19th Century
Accessories: goes with voltmeter 0269a
Object number: 0269b
Siemens & Halske AG
Date: circa 1900
Object number: 0275a,b
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
The W. M. Welch Scientific Company
Date: circa 1940
Object number: 1997-1-0369
Weston Electrical Instrument Corporation
Date: 1890-1920
Object number: 0313
See also/See also
