galvanometer
Datecirca 1929
Inventory Number0432
ClassificationGalvanometer
Subject
Maker
Leeds & Northrup Company
1903 - 1995
User
Emory Leon Chaffee
1885 - 1975
User
Department of Physics, Harvard University
founded 1884
Cultural Region
Place of Origin
Place of Use
Dimensions9.8 × 7.2 × 11.6 cm (3 7/8 × 2 13/16 × 4 9/16 in.)
blue board box: 10.8 × 25.7 × 21.3 cm (4 1/4 × 10 1/8 × 8 3/8 in.)
blue board box: 10.8 × 25.7 × 21.3 cm (4 1/4 × 10 1/8 × 8 3/8 in.)
Material
Accessoriesbox
DescriptionA small fan-shaped meter with needle in bakelite case mounted on a molded bakelite rectangular case with two binding posts with an additional mountable meter. There is a centering knob on meter movement with a clamp button directly below. The dial for registering the deflection of the needle is marked every degree and labeled every five degrees from 10-0-10. The galvanometer fits into its original storage box.
There is a painted yellow/orange square on lower right corner of case. There is a button marked "CLAMP" directly below centering knob. Specifications are scratched on bottom: No 2320C / 250 ohms / 1 x 10^-6 Amps/div.
There is a painted yellow/orange square on lower right corner of case. There is a button marked "CLAMP" directly below centering knob. Specifications are scratched on bottom: No 2320C / 250 ohms / 1 x 10^-6 Amps/div.
Signedon case: LEEDS & NORTHRUP CO. / PHILADELPHIA / MADE IN U.S.A.
on centering knob: LEEDS & NORTHRUP CO. PHILADELPHIA [with etched "#3" in center]
on storage box, printed on red label: LEEDS & NORTHRUP / 4901 STENTON AVENUE / PHILADELPHIA, PA. / MADE IN U.S.A.
Curatorial RemarksUsed by Prof. E. L. Chaffee, the orange rectangular mark put on the meter by D. P. Wheatland.
FunctionSuch an instrument is used to measure electric currents.
ProvenanceFrom the Department of Physics, Cruft Laboratory, Harvard University, 12/16/1963.
Rawson Electrical Instrument Company
Date: circa 1930
Object number: 0428
Westinghouse Electric & Manufacturing Company
Date: 1952
Object number: 2003-1-0037
Weston Electrical Instrument Corporation
Date: circa 1920
Object number: 0553
Date: 1890-1930
Object number: RS0501
R. & J. Beck
Date: 1876
Accessories: oculars (2) in microscope; Darker's selenite retarding filters (3); wheel diaphragm; mechanical rotary stage; stage slider. Other accessories are in the case (1122b), including monocular draw tube; oculars (3); objectives in cans (5); empty can; Lieberkühn; polarizing set; slides; camera lucidas (2); etc.; plus a Beck patent substage condenser (1122c); and apertometer (1122d).
Object number: 1122a
Weston Electrical Instrument Corporation
Date: circa 1914
Accessories: multiplier in case of instrument; standardization certificate from the Weston Laboratory, Newark, N.J. Feb.1914 on lid of wooden case
Object number: 0278