100 amp shunt
Date: circa 1912
Inventory Number: 0533d
Classification: Shunt
Subject:
Maker: Weston Electrical Instrument Corporation (founded 1888)
User: Department of Physics, Harvard University (founded 1884)
User: Harvard Engineering School (1918 - 1951)
Cultural Region:
Place of Origin:
City of Use:
Dimensions:
5.4 x 15.5 x 3.2 cm (2 1/8 x 6 1/8 x 1 1/4 in.)
Accessories: two cast metal connectors
Description:
100 AMP Shunt #64146 6 1/8" long 4 strips of resistance material secured between two cast brass blocks with large nuts and smaller screws for line and meter. On wood block.
Signedunsigned
Inscribedraised letters on right block: ON;
on right block: 50 M.V.
raised letters on left block: 100 / AMP;
on metal strip: PAT MAY 16 [illegible]
painted on metal strip: 33
on right block: 50 M.V.
raised letters on left block: 100 / AMP;
on metal strip: PAT MAY 16 [illegible]
painted on metal strip: 33
FunctionAccording to card, the shut is pivoted with bolts rather than wing bolts for current conductors, which would indicate it was used with a switchboard meter.
ProvenanceFrom the Jefferson Physical Laboratory, Harvard University. Was used for teaching Physics 3 class; and from Pierce Hall, Engineering School, Harvard University.