Electric lamp or space discharge component or device manufacturi – Process – With testing or adjusting
Patent
1990-10-18
1992-01-28
Seidel, Richard K.
Electric lamp or space discharge component or device manufacturi
Process
With testing or adjusting
445 6, H01J 942
Patent
active
050839578
ABSTRACT:
So as to detect and remove tubes having too low a vacuum before gettering, a d.c. voltage which continuously increases from a low value to a maximum value is applied between the anode (g4) and a second electrode (g3) of a television display tube, the increase in this voltage being stopped as soon as a spark discharge current flows in the tube. The associated value of the d.c. voltage is evaluated as a criterion for the selection of the tubes.
REFERENCES:
patent: 4720652 (1988-01-01), Dubois, Jr.
Bolz Andre
Wehr Hermann
Fox John C.
Knapp Jeffrey T.
Seidel Richard K.
U.S. Philips Corporation
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