Checkered grid preferably for use as antidazzle screen at fluorescent tube fittings

Claim 2

An antidazzle screen for use with a fluorescent tube fitting comprising a pair of end bars of a relatively rigid material, a plurality of foldable longitudinal strips having reflecting properties, said longitudinal strips being mounted substantially in pArallel between said end bars, a plurality of transverse strips having paired recesses and connected to support said longitudinal strips at spaced-apart points, a pair of lateral flanges depending inwardly from said fluorescent fitting, said transverse strips being movably supported on said rigid lateral flanges by means of said paired recesses.

Claim 3

An antidazzle screen as recited in claim 1, wherein said longitudinal strips and said transverse strips are made of cardboard covered with a reflective material.

Claim 4

An antidazzle screen as recited in claim 2, wherein said relatively rigid material is metal and said transverse strips are made of metal.

Claim 5

A checkered grid for use as an antidazzle screen in connection with illuminating bodies comprising two end bars of a relatively rigid material, a plurality of longitudinal strips having reflecting properties of a foldable material said longitudinal strips placed upright and mounted substantially in parallel between said bars, and a plurality of transverse strips of said foldable material being placed upright in parallel and interconnecting with the longitudinal strips at spaced-apart points so as to form together with said longitudinal strips a bellows-like structure extendable in the longitudinal direction of the longitudinal strips, said grid being extensible to a normal grid shape from a folded state in which said end bars are separated by a minimum distance, said end bars being fixed in a spaced relationship at respective ends of said fitting in said normal grid shape, and a rigid lateral flange located on either side of said fitting, said transverse strips being supported by engagement between said rigid lateral flanges.

Claim 6

A checkered grid for use as an antidazzle screen in connection with illuminating bodies comprising two end bars of a relatively rigid material, a plurality of longitudinal strips having reflecting properties of a foldable material said longitudinal strips placed upright and mounted substantially in parallel between said bars, and a plurality of transverse strips of said foldable material being placed upright in parallel and interconnecting with the longitudinal strips at spaced-apart points so as to form together with said longitudinal strips a bellows-like structure extendable in the longitudinal direction of the longitudinal strips, said grid being extensible to a normal grid shape from a folded state in which said end bars are separated by a minimum distance, said end bars being fixed in a spaced relationship at respective ends of said fitting in said normal grid shape, and a rigid lateral flange located on either side of said fitting, said transverse strips being supported by engagement between said rigid lateral flanges.

Claim 7

A checkered grid according to claim 4, wherein said relatively rigid material is a fibrous material having a reflective coating.

Claim 8

A checkered grid according to claim 1, wherein said transverse strips have a length exceeding the free distance between the respective rigid lateral flanges and are provided at each end with a recess such that the checkered grid can be mounted in place by slightly skewing the grid package and engaging the respective recesses of the transverse strips on said rigid lateral flanges, and said grid after the fastening of one end bar at the corresponding end of the fitting can be extended and fixed by fastening the other end bar at the opposite end of the fitting.

Claim 9

A checkered grid according to claim 1, wherein said longitudinal and transverse strips have an equal width and a straight original shape for forming a plane grid.

Claim 10

A checkered grid according to claim 1, wherein the longitudinal strips and the transverse strips have substantially equidistant spacing in said extended grid state to form substantially square grid fields, and said strip width is equal to the distance between said strips.