Magnetically controlled exhalation valve

Claim 1

AN EXHALATION PRESSURE OPERATED VALVE COMPRISING A BODY PORTION FORMED WITH A PLURALITY OF EXHAUST OPENINGS THEREIN, A DOWNWARDLY DIRECTED VALVE SEAT SUPPORTED ADJACENT THE TOP OF THE BODY PORTION, A VALVE MEANS HAVING AN UPPER AND A LOWER SURFACE, SAID VALVE NORMALLY BEING BIASED INTO ENGAGEMENT WITH SAID SEAT, SAID VALVE BEING SECURED TO AND SUPPORTED BY A SPRING EXTENDED BELLOWS CONNECTED TO THE LOWER PORTION OF SAID BODY PORTION AND THE LOWER SURFACE OF SAID VALVE, OPEN FRAME MEANS MOUNTED IN THE UPPER PORTION OF SAID BODY PORTION, MAGNET MEANS SUPPORTED IN SAID FRAME COOPERATING WITH SAID SPRING EXTENDED BELLOWS TO POSITIVELY RETAIN SAID VALVE MEANS SEATED IN CLOSED POSITION AGAINST SAID DOWNWARDLY DIRECTED VALVE SEAT INTERMITTENTLY BETWEEN EXHALATION PRESSURE UNSEATED OPEN POSITION OF SAID VALVE MEANS, SAID VALVE MEANS BEING DISENGAGED FROM SAID VALVE SEAT BY EXHALATION PRESSURES ON THE UPPER FACE OF SAID VALVE WHEREBY SAID SPRING EXTENDED BELLOWS IS PARTIALLY CONTRACTED WITH EACH EXHALATION AND PERMITS EXHALATION EXHAUST FROM SAID EXHAUST OPENINGS, AND SAID VALVE MEANS HAVING A CENTRALLY POSITIONED ATTRACTION PLATE CARRIED THEREBY BELOW SAID MAGNET MEANS, SAID MAGNET BEING VERTICALLY ADJUSTABLE IN SAID FRAME, TO THEREBY VARY THE EFFECT OF THE MAGNETIC FIELD WITH RESPECT TO SAID ATTRACTION PLATE UPON ACTUATION OF SAID VALVE MEANS BY EXHALATION PRESSURE.