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Quality
Tour of RCA's Receiving-Tube Manufacturing Facilities |
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Tour
page 3 of 5 |
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14.
By studying a close-up of a shadow projection, the wire spacing of a grid
can be determined with a high degree of accuracy. |
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13.
The results must be checked and rechecked. Shadow projections permit accurate
inspection and control of uniformity. |
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15.
A sprayer automatically coats the precisely correct amount of material in
each cathode. |
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16.
Each batch of cathodes is subjected to many quality control tests performed
during all manufacturing stages. Cathodes are weighed to make certain that just
the right amount of spray material is applied - for too much or too little coating
could adversely affect tube performance and life. |
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17.
The heart of the receiving tube is put together by an automatic cage maker,
developed in RCA's Harrison, N.J., plant. It combines many complex operations
for maximum accuracy in assembly. Mica wafers, grids, plates, shields, heater,
and stem are all joined here. Of course, each assembly is inspected as it comes
from the cage. maker. |
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18.
Another inspection procedure takes place at the Sealex machine where glass
parts (including stem and bulb attachments) are examined and reexamined. |
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