US 5,030,882 AGranted

Protective screen for a visual display device

AssigneeBaltea S.p.A.

InventorGiorgio Solero

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Abstract

A protective screen for a visual display unit (VDU) comprises a filter layer which is operative to protect the operator from electrostatic and electromagnetic fields and from residual radiation of a cathode ray tube (CRT) of the VDU. The VDU comprises a body structure for the CRT and the screen comprises a support frame for the filter layer, an intermediate support between the frame and the body structure of the VDU and a pair of fixing plates which are adjustable both front to back and angularly, for fixing the intermediate support to the upper portion of the body structure independently of the specific form of the body structure. The frame of the screen is also pivoted to the intermediate support to permit the filter layer to be disposed in front of the display surface of the CRT or be swung up to expose the CRT screen.

Claims15

Dependent claims

A protective screen for a visual display unit with a cathode ray tube having a display surface and a body structure for the cathode ray tube, said screen comprising a filter layer which is operative for protection purposes;

a support frame for said filter layer;
fixing means for being fixed to said body structure;
an intermediate member;
pivot means on said support frame and said intermediate member to pivot said filter layer with respect to said intermediate member;
and adjustable means for adjustably positioning the intermediate member with respect to the fixing means, wherein said adjustable means comprise
first and second guide members on said intermediate member and first and second coupling joints on said fixing means, wherein the second guide member is parallel to and spaced apart relative to the first guide member and wherein the first guide member and the second guide member can slide with respect to said first coupling joint and said second coupling joint, respectively, for a back and forth adjustment of the intermediate member with respect to the display surface;
and
first resilient toothed positioning means close to said first guide member and said first coupling joint and second resilient toothed positioning means close to said second guide member and said second coupling joint, respectively, for movement in incremental steps as between said intermediate member and said fixing means;
and
wherein said pivot means comprise two lugs projecting from an upper portion of said support frame spaced apart from each other, two side portions of said intermediate member and first and second pivotal couplings between said lugs and said side portions.

7 more elements

a support frame for said filter layer;
fixing means for being fixed to said body structure;
an intermediate member;
pivot means on said support frame and said intermediate member to pivot said filter layer with respect to said intermediate member;
and adjustable means for adjustably positioning the intermediate member with respect to the fixing means, wherein said adjustable means comprise
first and second guide members on said intermediate member and first and second coupling joints on said fixing means, wherein the second guide member is parallel to and spaced apart relative to the first guide member and wherein the first guide member and the second guide member can slide with respect to said first coupling joint and said second coupling joint, respectively, for a back and forth adjustment of the intermediate member with respect to the display surface;
and
first resilient toothed positioning means close to said first guide member and said first coupling joint and second resilient toothed positioning means close to said second guide member and said second coupling joint, respectively, for movement in incremental steps as between said intermediate member and said fixing means;
wherein said first guide member and said second guide member each comprise a pair of flanges extending front to back on said intermediate member;
wherein said fixing means comprise a pair of plate members for individual fixing to said body structure;
and
wherein said first coupling joint and said second coupling joint each comprise a projection having a cylindrical terminal body, and in which each said cylindrical body slides and rotates within a pair of said flanges with freedom of translatory and rotational movement with respect to said intermediate member for adaption of the angular position of the plate members to said body structure.

9 more elements

Dependencies are inferred from the claim text.