Insect protection for openings of buildings

Claim 1

Insect protection for an opening in a building, said opening being defined by a pair of substantially vertical side boundary surfaces, an upper boundary surface and a lower boundary surface, said protection comprising: a net of elastic weather-resistant and corrison-resistant material placed within said opening and provided with permanent horizontal creases, said net adapted for vertical motion between a first position in which said net is folded at said creases in zig-zag configuration to at least partially expose said opening, and a second substantially stretched position in which said net substantially seals said opening, the width of said net when in non-deformed condition being greater than the width of said opening so that the lateral edges of said net are compressed between said vertical side boundary surfaces; a horizontal stabilizing rod fixed to the lower edge of said net, the length of said rod being less than the width of said opening; a pair of traction cords for moving said net upward and downward between said first and second positions, each such cord extending upward through a series of vertically disposed openings in said net, one such opening being situated between each such pair of adjacent creases and the lower end of each such cord being secured to said stabilizing rod; and means for securing in tightly folded configuration the excess length of said net to permit adjustment of the stretched length of said net to the height of said building opening.