Signedunsigned
Inscribedcarved on wood: 5 AMP;
on metal: PAT MAY [ILLEGIBLE]
FunctionFrom Card: Except for 533b [this shunt], all these shunts are pivoted with bolts rather than wing bolts for current conductors, which would indicate these were used with switchboard meters.
ProvenanceFrom the Jefferson Physical Laboratory, Harvard University. Was used for teaching Physics 3 class; and from Pierce Hall, Engineering School, Harvard University.