Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Reexamination Certificate
2007-05-08
2007-05-08
Williams, Joseph (Department: 2879)
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
C313S402000
Reexamination Certificate
active
09900369
ABSTRACT:
A cathode ray tube includes a tension mask attached to a rectangular mask frame assembly that has two long sides paralleling a central major axis thereof and two short sides paralleling a central minor axis thereof. The two long sides are disposed at generally a right angle with respect to the two short sides with each of the sides connected to form a continuous generally planar support frame having an inner and outer peripheral surface. The support frame is formed of a material having a first coefficient of thermal expansion and includes a detensioning member formed of a second coefficient of thermal expansion on the peripheral surface of at least one side of the frame to facilitate detensioning of the mask.
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patent: 5111107 (1992-05-01), Kume et al.
patent: 5932957 (1999-08-01), Ragland, Jr.
patent: 6046534 (2000-04-01), Horiuchi
patent: 6686684 (2004-02-01), Van Der Wilk
patent: 0393488 (1990-10-01), None
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Fried Harvey D.
Laks Joseph J.
Thomson Licensing
Verlangieri Patricia
Williams Joseph
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