meter shunt for small currents
Date1920
Inventory Number1997-1-0133
ClassificationShunt
Subject
Maker
Spindler & Hoyer
1898 - 1996
User
Department of Physics, Harvard University
founded 1884
Cultural Region
Place of Origin
Place of Use
Dimensions3.4 × 20 × 7.8 cm (1 5/16 × 7 7/8 × 3 1/16 in.)
Material
AccessoriesChart titled "Zweifaden-Elektrometer Nr. 378" [photocopy; original stored in the file for Inv. No. 1997-1-0131]
DescriptionWood board with 6 binding posts and three small coils made of wood with wire insulated by white fabric.
The binding posts are marked (clockwise) G, +, 1, 10, 100 and G. (milliamperes).
The binding posts are marked (clockwise) G, +, 1, 10, 100 and G. (milliamperes).
Signedstamp on wood: SPINDLER&HOYER / GÖTTINGEN / MADE IN GERMANY
Inscribedon plaque: mAmp.
on wood: E3
Curatorial RemarksAlready tagged: "Shunts for scale readings of: 1,10, 100 mAmp." "from the Lecture Demonstration setup: 'E3'" "from Jeff Lab Apr 1981".
Same maker and similar style as 1997-1-0131 and 1997-1-0132.
FunctionShunts divert most of the current away from a meter extending its range of operation and preventing damage. Depending on the desired range one connects the circuit to a different post on the shunt.
This particular shunt is for very small currents, as small is 1 milliampere.
This particular shunt is for very small currents, as small is 1 milliampere.
ProvenanceJefferson Physical Laboratory, Harvard University, 1981.
Historical AttributesFrom Lecture Demonstration set up 'E-3'
Spindler & Hoyer
Date: 1920
Accessories: Chart titled "Zweifaden-Elektrometer Nr. 378" [photocopy; original stored in the file for Inv. No. 1997-1-0131]
Object number: 1997-1-0132
Spindler & Hoyer
Date: 1920
Accessories: chart titled "Zweifaden-Elektrometer Nr. 378" [original]
Object number: 1997-1-0131
Spindler & Hoyer
Date: 1900-1930
Object number: 0464
Spindler & Hoyer
Date: 1940-1960
Object number: 1996-1-0721
General Electric Company
Date: circa 1915
Accessories: part of a group of four, 0564a-d
Object number: 0564c
General Electric Company
Date: circa 1915
Accessories: part of a group of four, 0564a-d
Object number: 0564d
General Electric Company
Date: circa 1915
Accessories: part of a group of four, 0564a-d
Object number: 0564a
General Electric Company
Date: circa 1915
Accessories: part of a group of four, 0564a-d; the leather handle has separated from the device
Object number: 0564b
Weston Electrical Instrument Corporation
Date: 1900-1917
Accessories: belongs with voltmeter (0526a); other accessories are another shunt (0526c) and the box (0526d)
Object number: 0526b
See also/See also
