Victor Dental X-ray Tube (ca. 1926-1930) |
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This is a
dental x-ray tube manufactured by the Victor X-Ray Corporation, a
subsidiary of General Electric. The estimated date of manufacture
(1926-1930) is based on the last patent date indicated on the tube
(October 20, 1925) and the fact that the GE stopped using the "Victor"
name in 1930.
The right angle design provided for a more compact configuration, something particularly advantageous in a dental unit because the tube needed to be positioned close to the patient. Unfortunately, the radiating fins used for cooling the anode are missing from this example. |
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The cathode (photo to left), located in a hemispherical focusing cup, is a spiral coil similar to that used in the "Universal" x-ray
tubes.
The recommended maximum operating current, 10 milliamps, is etched onto the glass bulb just above the Victor logo. A similar (perhaps identical) tube marketed by GE in 1934, had a maximum rating of 63 kvp and 10 mA at 75 seconds. Also etched on the glass are the letters "RD" followed by what is probably the serial number. The RD is likely the model number of the tube and the "D" probably indicates "dental." Size: approximately 12" long with a bulb diameter of approximately 3.5" |
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Kindly donated by Margie Wheaton in memory of her father Dr. Julius E. Marfy References: ERN Grigg. Trail of the Invisible Light. Charles C Thomas 1965. General Electric X-ray Corporation. Coolidge X-ray Tubes - Kenotrons. Bulletin No. 293. 1934. |
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