Air cooler for power tubes

Claim 1

APPARATUS FOR COOLING A MAGNETRON OF THE TYPE HAVING A GENERALLY CYLINDRICAL BODY AND HAVING CONNECTING MEANS EXTENDING OUTWARDLY FROM A RELATIVELY SMALL PORTION OF SAID CYLINDRICAL BODY COMPRISING: TWO PACKAGES OF COOLING FINS MOUNTED ON AND EXTENDING AWAY FROM SAID CYLINDRICAL BODY, EACH OF SAID FINS IN EACH OF SAID PACKAGES HAVING AN INNER EDGE, AN OUTER EDGE AND LATERAL EDGES; AN INNER PORTION OF EACH OF SAID FINS EXTENDING PERPENDICULARLY TO THE MAIN AXIS OF THE CYLINDRICAL BODY; THE INNER EDGE OF EACH OF SAID FINS CONFORMING TO THE SURFACE OF A PORTION OF SAID CYLINDRICAL BODY; THE ARCUATE LENGTH OF THE INNER EDGE OF EACH OF THE FINS IN ONE OF THE PACKAGES BEING LESS THAN THE ARCUATE LENGTH OF THE INNER EDGE OF EACH OF THE FINS IN THE OTHER PACKAGE; THE REMAINING PORTIONS OF EACH OF SAID FINS AS BOUNDED BY SAID OUTER EDGE, SAID LATERAL EDGES AND THE OUTER END OF SAID INNER EDGE THEREOF BEING SPREAD APART FROM EACH OTHER IN A FANLIKE MANNER SO AS TO DEFINE WEDGE-SHAPED SPACES THEREBETWEEN FOR THE STRAIGHT PASSAGE OF A COOLANT AIR STREAM IN A DIRECTION PERPENDICULAR TO THE AXIS OF SAID CYLINDRICAL BODY; SAID TWO PACKAGES BEING ARRANGED WHEREBY THE INNER EDGES OF SAID FINS SUBSTANTIALLY ENCOMPASS SAID CYLINDRICAL BODY WITH THE EXCEPTION OF SAID OUTWARDLY EXTENDING CONNECTING MEANS; MEANS DEFINING A PIVOT MEMBER LYING IN A PLANE PARALLEL TO THE AXIS OF SAID CYLINDRICAL BODY AND SPACED OUTWARDLY OF THE OUTER SURFACE OF SAID CYLINDRICAL BODY, SAID PACKAGES BEING IN CONTACT WITH SAID PIVOT MEMBER; AND MEANS FOR DRAWING SAID PACKAGES TOGETHER ABOUT SAID PIVOT TO DRAW SAID CONFORMING INNER EDGES OF EACH OF SAID FINS INTO INTIMATE CONTACT WITH SAID CYLINDRICAL BODY.