Device to shield mask cathode tubes from the earth's magnetic field
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United States of America Patent
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Jul 10, 1990
Grant Date -
N/A
app pub date -
Nov 6, 1987
filing date -
Nov 7, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
To improve the trichromatic cathode tube shielding effect given by the frame-mask set and by a shielding material made with material of low magnetic permeability, the external conductors of a de-magnetization coil with two loops are made to pass in front of the fastening lugs and not behind the frit plane as was the case before, and the position of the internal conductors is set to obtain the best compromise.
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