voltmeter
Datelate 19th-20th Century
Inventory Number0215
ClassificationVoltmeter
Subject
Maker
Hartmann & Braun AG
1879 - 1999
User
Harvard University
founded 1636
Cultural Region
Place of Origin
Place of Use
Dimensions7.9 × 15.6 × 15.6 cm (3 1/8 × 6 1/8 × 6 1/8 in.)
Material
DescriptionA vane-type voltmeter with a multipier. Instrument is housed in a cylindrical, blackened brass case with a glass cover over the display. The instrument scale makes up the top half of the display, with a printed scale from 0-15.
The lower half of the display is covered in metal, with the instrument indicator anchored to a pivot in the center of the display. The sides of the instrument case have two adjustable knobs and a push button.
The lower half of the display is covered in metal, with the instrument indicator anchored to a pivot in the center of the display. The sides of the instrument case have two adjustable knobs and a push button.
Signedprinted above scale: HARTMANN & BRAUN / FRANKFURT A/M. / D.R.P.;
Inscribedprinted instrument scale: 0-15;
printed below scale: No. 49240 / VOLT;
Curatorial RemarksTagged "D.C. - ?"
FunctionVoltmeter. Probably D.C.
ProvenanceChemistry Deptartment, Harvard University.
Removed to this collection 10/10/54.
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: 1911
Accessories: shunt (0438b)
Object number: 0438a
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
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
