Gundelach x-ray tube
date: label: date made
content: ca 1910
name: label: maker
content: Gundelach, Emil
notes: label: Description (Brief)
content: X-ray Tube, marked on stem: "[logo of Emil Gundelach] / D.R.P. No. 109449 / D.R.P. No. 103100 / Made in Germany" and "P2B7". This is a cold cathode tube. Much of the interior is heavily corroded. The long tube leading to the heavy copper anti-cathode was probably originally covered in black enamel to dissipate heat. The broken stem was probably a palladium tube used for osmo-regeneration. German patent numbers and the tube serial number are extant. This type of tube was manufactured by Emil Gundelach between 1899 and 1925. Reference: Development of the Ion X-ray Tube by Paul Ronne and Arnold B.W. Nielsen; Acta Historica Scientiarium Naturalium et Medicinalium; C.A. Reitzel Publishers; Copenhagen, 1986.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Columbia University, Department of Physics, thru Alvin P. Tramm
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.323795
label: accession number
content: 249200
label: catalog number
content: 323795
label: collector/donor number
content: P2B7
objectType: label: Object Name
content: Xray Tube
label: Object Name
content: x-ray tube
physicalDescription: label: Measurements
content: overall: 16 in x 5 1/2 in; x 40.64 cm x 13.97 cm