Signedstamped in white on bulb: 10 MA. / COOLIDGE / (VICTOR logo) / - TUBE - / MADE IN U.S.A. / 62213
FunctionThis Coolidge tube produces electrons by the heating of a cathode filament. These electrons are accelerated by a high voltage and hit the angled anode to produce the x-rays. Due to the large amounts of generated heat, this unit included radiator fins as a cooling mechanism, which allowed for a relatively small bulb size. It could also work without a rectifier as the anode was kept cold enough not to emit electrons for an inverse current.
This one was probably used for dental radiography.
ProvenanceFrom the Harvard Medical School.