Magnetic weather seal and window control

Claim 1

A STORM WINDOW UNIT INCLUDING AT LEAST TWO PAIRS OF PARALLEL AND ADJACENT TRACKS, EACH TRACK CONSISTING OF A PAIR OF FLAT RAILS HAVING A FRONT FACE AND A REAR FACE, A REAR WINDOW SASH PIVOTABLY MOUNTED BY TWO OPPOSITELY EXTENDING PROJECTIONS FROM OPPOSITE ENDS OF SAID SASH WHICH TOGETHER WITH THE SASH RIDE UP AND DOWN THE REARMOST OF SAID TRACKS, A FORWARD WINDOW SASH PIVOTABLY MOUNTED BY TWO OPPOSITELY EXTENDING PROJECTIONS FROM OPPOSITE ENDS OF SAID SASH WHICH TOGETHER WITH THE SASH RIDE UP AND DOWN THE FORWARDMOST OF SAID TRACKS, BOTH SAID WINDOW SASH BEING PIVOTABLE FORWARDLY OF THE UNIT BUT EACH BEING PREVENTED FROM PIVOTING REARWARDLY OF THE UNIT BY THE CORRESPONDING REARMOST RAIL OF EACH TRACK WHICH DEFINES A RECTANGULAR OPENING THAT IS SMALLER THAN THE SASH WHICH FITS IN THE TRACK, MEANS FOR RETAINING THE WINDOW SASH IN FACE-TO-FACE ABUTMENT WITH AN ADJACENT RAIL IN SELECTED RAISED POSITIONS AND FOR SEALING THE SASH AND FRAME SO AS SUBSTANTIALLY TOP REVENT THE PASSAGE OF AIR BETWEEN THEM WHEN THE SASH IS IN THE CLOSED WINDOW POSITION, COMPRISING, A MAGNETIC STRIP AND A MAGNETIZABLE STRIP, ONE OF WHICH STRIPS EXTENDS ALONG AT LEAST ONE FACE OF THE FRAME OF EACH OF SAID SASH AND THE OTHER OF WHICH STRIPS EXTENDS ALONG AT LEAST ONE FACE OF EACH OF THE RAILS FORMING THE TRACKS, AT LEAST A PART OF THE MAGNETIC AND MAGNETIZABLE STRIPS BEING IN OPPOSED AND CONTIGUOUS RELATIONSHIP AT ALL TIMES SO THAT A RELATIVELY AIRTIGHT SEAL EXISTS BETWEEN THEM, AND THE ENTIRE CORRESPONDINGLY OPPOSED MAGNETIC AND MAGNETIZABLE STRIPS BEING IN FULL CONTACT WITH EACH OTHER WHEN THE WINDOW IS CLOSED WITH RESPECT TO THE WINDOW FRAME, WHEREBY TO FORM A SUBSTANTIALLY AIR-TIGHT SEAL BETWEEN THE FRAME AND THE SASH.