Signedon Hurst unit: HURST MFG CORP PRINCETON IND. / MODEL CA 115V 60HZ 5W 3RPM
on Bodine units: all have a similar plaque with operating parameters and small circular logo with "BODINE" in front of a motor
FunctionThese are all very slow motors (1-6 rpm) that would drive the frequency sweep mechanism for the NMR experiment (2004-1-0408a). Their shaft might would be connected to a variable capacitor mounted on an axis such that its capacitance would increase and diminish periodically with the frequency of the motor. They could also be connected first to a set of pulleys or gearboxes (2008-1-0408g) to change the rotational speed provided to the capacitor.
ProvenanceUsed in Harvard's advanced undergraduate physics lab (Physics 191r) before coming to the collection.