Keywords: RabinowJacob 019.jpg This model auto bus equipped with a magnetic fluid clutch and a magnetic fluid brake was constructed at NBS to demonstrate the potential application of the magnetic fluid principle to automotive clutches Jacob Rabinow chief of NBS' Ordnance Mechanics section and inventor of the clutch pictured operating the model from the control box held in his left hand National Institute of Standards and Technology 1950-01-01 National Institute of Standards and Technology PD-USGov-NIST PD-USGov Magnetic particle clutches Jacob Rabinow |