Raytheon "Kino Lamp" neon glow lamp
date: label: date made
content: ca 1930
name: label: maker
content: Raytheon Company
notes: label: Description (Brief)
content: A plastic 4-pin base with tipless T-shaped envelope. Donor's card reads: "Neon glow lamp made by Eveready-Raytheon Company about 1930 for use as a picture reproducing tube in mechanically scanned television receivers. The glow of this tube was modulated by pulses received from a continuous wave transmitter controlled by a light-sensitive tube, such as the 868 [catalog number 324657]. Pictures were transmitted by focusing on the subject through an opening about 1 inch square, through a disc revolving about 3600 RPM with a spiral layout of holes near its edge. When turned, the disc produced varying lines of light through the disc holes across the light-sensitive tube, modulating the transmitter according to the density of the light beam. A variation in the density of the glow of the Keno Lamp was produced by this modulated transmission, and when viewed through a square opening and a revolving disc similar to that in the transmitter and synchronized with the transmitter, a picture appeared in the rectangular opening corresponding to the subject viewed by the transmitter. Synchronization of the discs was difficult and still harder to hold, however several stations were transmitting pictures in this fashion on about 90 meters in the late 1920s and early 1930s."
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Paul G. Watson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.324406
label: catalog number
content: 324406
label: accession number
content: 252994
objectType: label: Object Name
content: Neon Glow Tube
label: Object Name
content: glow lamp
label: Object Name
content: discharge lamp
label: Object Name
content: neon glow lamp
label: Object Name
content: coronal discharge lamp
physicalDescription: label: Measurements
content: overall: 6 in x 2 in; 15.24 cm x 5.08 cm