GLASS ENCLOSED MINIATURE CRYSTAL UNITS.
Rept. no. 5, May-Jul 62,
KNIGHTS (JAMES) CO SANDWICH ILL
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Research was continued in an effort to develop suitable manufacturing techniques and equipment for sealing 120 crystal units per eight hour day in HC-26U glass enclosures to produce pilot runs on five frequencies in the range 50 to 100 mc. Results of experiments with various cements and curing and vacuum baking processes are detailed. The most nearly successful sequence involved pre-curing in air at near room temperature, curing at an elevated temperature near the recommendation of the manufacturer of the cement, and vacuum baking at a still higher temperature to render the cement inert when subjected to the heat of sealing. Three cements are potentially useable, Bondmaster, Isochemduct 3.5, and Bakelite silver. Author