3.8-inch hot cathode high vacuum X-ray tube
Date: 1920-1925
Inventory Number: VT4730
Classification: X-ray Tube
Maker: Victor Electric Company (1893 - 1923)
Supplier: General Electric Company (1892-present)
Cultural Region:
Place of Origin:
Dimensions:
9.7 x 47 x 9.7 cm (3 13/16 x 18 1/2 x 3 13/16 in.)
Description:
Victor model No. 62213. A "Coolidge tube" made by Victor for GE. This is a high vacuum, hot cathode x-ray tube with a Tungsten anode inset in copper. The cathode has a lightbulb screw and the angled anode has radiator fins attached. For 10 mA current.
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.
This one was probably used for dental radiography.
Curatorial RemarksThis design first patented by GE around 1916.
GE purchased controlling interest in Victor in 1920.
GE purchased controlling interest in Victor in 1920.
ProvenanceFrom the Harvard Medical School.