Abstract:
An improved vidicon tube is produced by adding a transmission grid to a standard vidicon tube. The improved tube serves as an image buffer which is compatible with broadband and narrowband transmission lines and can be written electrically at high or low data rates as well as optically. Information optically impressed on the photoconductor can be transferred to storage on the transmission grid. The improved vidicon, when built with a standard T.V. compatible photoconductor, is used as an intrusion alarm. When the improved vidicon is built with a storage photoconductor, information which is electrically written on the transmission grid is converted to conductivity storage in the photoconductor. Appropriate supporting apparatus and methods of operating this versatile tube are discussed.
Abstract:
A water removable material ordinarily used as a brazing stop-off - i.e. to restrict the flow of a molten metal and thereby to prevent wetting of an underlying surface in a brazing or soldering process - has been found useful presently as a means to prevent oxidation of, or other damage to, terminal metallurgy of metallized glass components during protracted periods of baking, gas-filling and glass sealing processing incidental to fabrication of gas discharge display panel assemblies. The subject baking, gas-filling and sealing processing involves hours or even days of variant temperature treatment, which should be distinguished from seconds or at most minutes of brazing treatment. The protective function required of the water removable coating during this prolonged processing period is considered unique and eliminates certain application and removal process operations associated with the use of other protective media (e.g. sintered glass frit).