Attic ventilation system

A frame for use in a ventilation opening in a building comprising:

• an elongated sheet metal strip bent along its longitudinal axis to provide:
• a first generally flat portion for assuming a substantially flush position against the opposite surface of the building when mounted;
• a second portion angularly extended from said first portion to form a longitudinally extending slot in which the screen or grate may slide permitting the installation and removal thereof without tools;
• a third portion extending substantially orthogonal to said first portion and cut transversely to said axis to provide one or more tabs for extending inside the opening and engaging an inside surface thereof;
• and
• said first and second portions being cut transversely to said axis in three places, intermediate the ends with said third portions being bent ninety degrees at each of said cuts to form said strip into a four legged rectangular shape the ends of said thusly bend strip being fastened together to form a rigid rectangular structure, with the said second portion on one of the sides of said rectangular shape being flattened against said first portion of said one side.

A frame for use in a ventilation opening in a building comprising:

• an elongated sheet metal strip bent along its longitudinal axis to provide:
• a first generally flat portion for assuming a substantially flush portion against the opposite surface of the building when mounted;
• a second portion angularly extended from said first portion to form a longitudinally extending slot in which a screen or grate may slide permitting the installation and removal thereof without tools;
• a third portion extending substantially orthogonal to said first portion and cut transversely to said axis to provide one or more tabs for extending inside the opening and engaging an inside surface thereof;
• and
• said first and second portions being cut transversely to said axis in three places, intermediate the ends with said third portions being bent ninety degrees at each of said cuts to form said strip into a four-legged substantially rectangular shape the ends of said thusly bend strip being fastened together to form a rigid rectangular structure, with the said second portion on one of the sides of said rectangular shape being removed.

A building ventilation device comprising:

• a rectangular ventilation screen;
• an elongated sheet metal strip bent along its longitudinal axis to provide:
• a first generally flat portion for assuming a substantially flush portion against the opposite surface of the building when mounted;
• a second portion angularly extended from said first portion to form a longitudinally extending slot in which a screen or grate may slide permitting the installation and removal thereof without tools;
• a third portion extending substantially orthogonal to said first portion and cut transversely to said axis to provide one or more hand bendable tabs for extending inside the opening and engaging an inside surface thereof when bent;
• and
• said first and second portions being cut transversely to said axis in three places, intermediate the ends with said three portions being bent ninety degrees at each of said cuts to form said strip into a four legged substantially rectangular shape sized to slideably and removably receive said screen within said longitudinally extending slot.