General Motors type 76 "Visitron" photocell tube
date: label: date made
content: ca 1932
name: label: maker
content: G. M. Laboratories, Inc.
notes: label: Description (Brief)
content: Marked: "GM Laboratories Inc. / Visitron 76 / Chicago, U.S.A." and "3837". A 4-pin plastic base with tipped, G-shaped envelope. Back 30% of envelope is silvered and a lead wire is embedded in the coating. That lead passes thru the flat press and connects to one of the pins. The second lead is formed into a loop the plane of which is perpendicular to the first lead. There are deposits on the loop, press, and inner glass wall that appear to be mercury drops. References: Unit appears similar to the V-71 tube seen in a GM Labs advertisement in Electronics magazine, April 1930, page 98.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Franklin Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.322514
label: catalog number
content: 322514
label: accession number
content: 241556
objectType: label: Object Name
content: Photoelectric
label: Object Name
content: photoelectric cell
label: Other Terms
content: Photoelectric; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 1/4 in x 2 in; 10.795 cm x 5.08 cm