Air conditioning mixing sox control

Claim 1

IN AIR CONDITIONING CONTROL APPARATUS, A MIXING BOX, A PAIR OF INLET CONDUITS POSITIONED IN SAID BOX AND ADAPTED TO BE CONNECTED TO SUPPLY CONDUITS CARRYING AIR OF DIFFERENT TEMPERATURES, SELF-CONTAINED VALVE MEANS POSITIONED IN SAID INLET CONDUITS AND CONTROLLING THE FLOW OF TEMPERATE AIR FROM THE SUPPLY CONDUITS TO SAID MIXING BOX SAID MIXING BOX HAVING A DISCHARGE OPENING IN SAID MIXING BOX ADAPTED TO DISCHARGE TEMPERATE AIR TO A SPACE TO BE AIR CONDITIONED, A MIXING BAFFLE POSITIONED IN SAID MIXING BOX AND EXTENDING SUBSTANTIALLY ACROSS THE INTERIOR OF THE SAME TO BE AFFECTED BY AN AVERAGE PRESSURE WITHIN THE BOX, SAID BAFFLE BEING PIVOTALLY MOUNTED WITHIN SAID BOX AND INCLUDING A SPRING BIAS MEANS CONNECTED THERETO, SAID MIXING BOX WITH SAID BIASED BAFFLE PROVIDING A PRESSURE REGULATOR WITHIN THE MIXING BOX, ORIFICE MEANS POSITIONED WITHIN SAID MIXING BOX ADJACENT SAID PIVOTED BAFFLE AND CONTROLLED BY MOVEMENT THEREOF, SAID ORIFICE MEANS INCLUDING A PAIR OF CONCENTRIC ORIFICES, ONE LEADING TO THE INLET CONDUIT AND THE OTHER TO THE MOTIVE CHAMBER OF ONE OF SAID SELF-CONTAINED VALVES, SAID JUST-NAMED ORIFICE