12 and a smallest indentation 13 can be established ahead of time with perforations allowing shield 6 39 to be adapted to monitors of different dimensions to a monitor with a 14 34 screen for example the shield 6 34 illustrated in fig4 is in three components 18 19 and 20 the components are inserted in structural h section 14 the rear of h section 14 is provided with hollow flanges 15 as shown in fig5 the section can be secured to the housing with a rubber band through the flanges the shield 6 39 34 illustrated in fig6 is in contrast to those illustrated in fig2 and 4 unsymmetrical and has a single wing 17 on the right that can be folded forward along a score 16 the housing of a monitor to be fitted with a shield of the aforesaid type can to advantage have holders clips for example to secure it or its components a groove around the edges of the housing to insert the shield in is a practical approach another advantageous embodiment has a flat band around it that accommodates a rim secured to the shield in the simplest case however the shield can fit directly over the housing with no holders for practical applications the shield with its existing trimming and folding scores can be advantageously supplied along with an appropriate measuring rod and instructions and specifications in the form of a ready to use set since large and opaque shields could block off too much space overall it might also be a good idea for the shields to be semitransparent or translucent this feature could be attained for example with an extremely.