Vacuum sensitive electric control with mounting bracket

Claim 1

IN A VACUUM-SENSITIVE ELECTRIC CONTROL DEVICE, IN COMBINATION: A VACUUM SENSITIVE UNIT INCLUDING A TOP COVER; A TUBULAR TOP SHANK, OF POLYGONAL EXTERNAL CROSS SECTION, HAVING A BOTTOM FLANGE OF POLYGONAL PERIPHERY AND OF SHEET METAL THICKNESS, SECURED TO SAID TOP COVER WITH SAID POLYGONAL PERIPHERY PROJECTING BEYOND SAID TOP COVER, SAID TUBULAR TOP SHANK HAVING AN ANNULAR SNAP RING GROOVE IMMEDIATELY ADJACENT SAID FLANGE; AND A BRACKET OF FORMED SHEET METAL STRUCTURE COMPRISING A FLAT BODY PLATE PROVIDED WITH A POLYGONAL OPENING OF SLIGHTLY GREATER DIAMETER THAN THE EXTERNAL DIAMETER OF SAID FLANGE, SAID BODY PLATE BEING SEATED AGAINST SAID TOP COVER WITH SAID FLANGE DISPOSED IN SAID OPENING AND NON-ROTATABLY COUPLED TO THE POLYGONAL PERIPHERY THEREOF, SAID BODY PLATE HAVING AN OUTER END PORTION PROJECTING BEYOND THE DIAMETER OF SAID TOP COVER AND TERMINATING IN A MOUNTING TAB; AND A SNAP RING ENGAGED IN SAID ANNULAR GROOVE AND BEARING AGAINST THE OUTER FACE OF SAID BODY PLATE TO DETACHABLY SECURE SAID BRACKET IN ITS SEATED ENGAGEMENT WITH SAID TOP COVER.