Cathode ray tube suspension device
AssigneeThomson Licensing
InventorsMassimo Marino, Paolo Ginesti, Marco Malcosti
Life of this patent
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Abstract
Suspension lug of a cathode ray tube comprising weld zones on the anti-implosion frame of the tube, the said weld zones extend in a first direction over a length L and according to a second direction perpendicular to the first over a length l, shorter than the length L. At least one of the weld zones extends in a direction contained in a plane different from the plane in which the other weld zones extend. This structure can increase the solidity of the welds and limit their number.
Claims7
1/ Cathode ray tube comprising a glass envelope under vacuum comprising:
- a glass panel comprising a noticeably flat front face and a peripheral flange noticeably perpendicular to the said face,
- a rear part in the form of a funnel, sealed to the front face at the level of the flange and terminating in a cylindrical collar within which an electron gun is arranged,
- an electromagnetic deflection device designed to deflect the beams from an electron gun according to a maximum angle,
- an anti-implosion metal frame arranged around the glass panel and covering at least partially the said flange on which are arranged the L-shaped cross-section lugs whose base is welded to the frame,
- wherein at least one of the weld zones of the base of the lug to the frame extends according to a first direction over a length L and according to a second direction perpendicular to the first over a length l, shorter than the length L.
2/ Cathode ray tube according to claim 1, wherein the first direction is parallel to the plane of the front face and the second direction is perpendicular to the plane of the said front face.
3/ Cathode ray tube according to claim 1, wherein L≧1.3 l.
4/ Cathode ray tube according to claim 1, wherein the number of weld zones for each lug is even and in that the welds are arranged on either side of the diagonal plane perpendicular to the front face.
5/ Cathode ray tube according to claim 4, wherein each lug comprises at least four weld zones.
6/ Cathode ray tube according to claim 5, wherein at least two weld zones extend in the first directions contained in a same first plane and that at least two other weld zones extend in the first directions contained in a same second plane separate from the first.
7/ Cathode ray tube according to claim 1, wherein the maximum angle of deflection is greater than 115°.