Ventilating device for fabric bodies

Claim 1

A VENTILATING DEVICE COMPRISING A BASE PORTION CONSISTING OF A SUBSTANTIALLY FLAP PLATE HAVING AN OPENING THEREIN AND CARRYING AN UPSTANDING TUBE, THE LOWER END OF WHICH TUBE DEFINES SAID OPENING AND THE TUBE HAVING AN OPEN TOP END, AND A TOP PORTION CONSISTING OF A CHORDAL SECTION OF A SPHERE, WITH MEANS WITHIN THE CONCAVE SIDE THEREOF FOR ENGAGING THE OPEN TOP END OF SAID TUBE AND SUPPORTING THE SAID SECTION OPEN-SIDE DOWN OVER AND VERTICALLY SPACED FROM THE TOP OF SAID PLATE, THE SAID MEANS ENGAGING THE TUBE AT SPACED LOCATIONS THEREAROUND WHEREBY A FREE CIRCULATION OF AIR BETWEEN THE PLATE AND THROUGH THE TUBE IS PERMITTED, SAID MEANS COMPRISING WEB MEMBERS DISPOSED RADIALLY OF SAID SPHERE SECTIONS AND SECURED THERETO, AND EACH HAVING UPPER AND LOWER INNER EDGE PORTIONS, THE UPPER INNER EDGE PORTION BEING OFFSET INWARDLY FROM THE LOWER INNER EDGE PORTION TO PROVIDE A SUPPORTING SHOULDER CONTACTING THE TOP END OF SAID TUBE, AND THE LOWER INNER EDGE PORTION MAKING SUBSTANTIAL LINE CONTACT WITH THE SIDE OF SAID TUBE AND HOLDING SAID SECTION IN POSITION ON SAID TUBE.