Invisible window screen 1976

Darlene and I and Ryan and Kimberley moved into an older home with sash windows. They had screens like all homes have – they bothered me because they were always there even when the windows were closed. I thought of ways to make them be there only when the windows were opened. I imagined them on a roll like a window shade the rolls up and out of the way. I imagined them mounted under the window and attached to the bottom so when the window was raised the screen would cover the opening. When the window was closed the screen would retract onto the roller.