X-Ray Tube
date: label: associated dates
content: 1972 / 1972
name: label: maker
content: Gundelach, Emil
notes: label: Description
content: Cold cathode, three electrode glass x-ray tube with manual gas regulation, and a "G / Made in Germany / 57564" inscription that was made by the Gundelach firm in Gehlberg. The form was patented by Vallard and Chabaud in France and Gundelach in Germany. The gas regeneration used a palladium needle protected by a glass cover that, when heated with a flame, released hydrogen into the tube, overcoming the tendency of the pressure within the tube to decline over time, with resultant "hardening" of the x-ray beam. The tube has a heavy copper anode covered at the end with a thin platinum foil. The heavy copper block increased the heat capacity of the target; the platinum foil increased the atomic number of the target, to increase the x-rays produced. The tube has the Gundelach logo etched on the stem, and the two German patent numbers: DRP No. 109449 (for the target design), and DRP No. 103100 (for the osmo gas regeneration).
label: Location
content: Currently not on view
place: label: place made
content: Germany
label: associated place
content: United States: Maryland, Baltimore
setName: label: See more items in
content: Medicine and Science: Medicine
creditLine: label: Credit Line
content: Gift of The Medical and Chirurgical Faculty of the State of Maryland
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MG.302606.123
label: accession number
content: 302606
label: catalog number
content: 302606.123
objectType: label: Object Name
content: X-Ray Tube
label: Object Name
content: tube, x-ray
label: Other Terms
content: X-Ray Tube; Radiography
physicalDescription: label: Physical Description
content: glass (overall material)
label: Physical Description
content: purple (overall color)
label: Measurements
content: overall: 18.5 cm x 44 cm x 15 cm; 7 5/16 in x 17 5/16 in x 5 7/8 in