Air mixing and sound attenuating chamber

Claim 1

IN A MIXING AND SOUND ATTENUATION CHAMBER FOR AIR CONDITIONING SYSTEM OF THE TYPE HAVING TWO SOURCES OF CONDITIONED AIR, THE COMBINATION OF A CASING HAVING A PAIR OF SPACED INLETS NEAR ONE END OF CONNECTION WITH THE RESPECTIVE SOURCES AND ALSO HAVING A DISCHARGE OUTLET NEAR THE OTHER END, A STATIONERY PLATE MEMBER DISPOSED WITHIN THE CASING AND SUBSTANTIALLY CLOSING THE CASING BETWEEN SAID INLETS AND OUTLET, SAID STATIONERY PLATE MEMBER PROVIDED WITH A PLURALITY OF APERTURES THEREIN ARRANGED IN TWO ROWS PARALLEL WITH ONE ANOTHER AND SUBSTANTIALLY SIDE BY SIDE, A FLOW DIRECTING BAFFLE INTERPOSE BETWEEN SAID PLATE MEMBER AND SAID INLETS AND COEXTENSIVE WITH SAID PLATE MEMBER, ONE EDGE OF SAID BAFFLE MEMBER ADJOINING SAID PLATE MEMBER BETWEEN SAID ROWS AND THE OTHER EDGE EXTENDING SO AS TO SEPARATE SAID INLETS AND PLACE THEM INDIVIDUALLY IN COMMUNICATION WITH THE SEPARATE ROWS OF SAID APERTURES, A MOVABLE VALVING MEMBER COVERING ONE FACE OF SAID STATIONERY MEMBER AND SUPPORTED FOR SLIDING RECIPROCATION WITH RESPECT THERETO LENGTHWISE OF SAID ROWS BETWEEN OPPOSED LIMITING POSITIONS, SAID MOVABLE VALVING MEMBER HAVING OPENINGS SIMILAR TO THE APERTURES IN THE STATIONERY PLATE MEMBER, BUT SO ARRANGED THAT WHEN THE MOVABLE VALVING MEMBER IS IN ONE LIMITING POSITION CERTAIN OPENINGS OF SAID MOVABLE VALVING MEMBER REGISTER WITH THE APERTURES OF ONE ROW IN SAID STATIONERY PLATE MEMBER WHILE THE APERTURES OF THE OTHER ROW IN SAID STATIONERY PLATE MEMBER REMAIN UNCOVERED AND WHEN IN THE OTHER LIMITING POSITION, THE APERTURES OF THE OTHER ROW ARE COVERED WHILE THOSE OF THE ONE ROW ARE OPEN.