Preheater for airplane engines

Claim 1

A PREHEATER FOR MULTIPLE OPPOSED CYLINDER PROPELLER TYPE AIRPLANE ENGINES HAVING A COWLING COMPRISING: A PAIR OF SPACED TUBULAR ELONGATED HOUSINGS ARRANGED SIDE BY SIDE, EACH HAVING AN OPEN AIR OUTLET END; ADJUSTABLE BRACKET MEANS CONNECTING SAID HOUSINGS, INCLUDING PIVOTAL CONNECTION MEANS ENABLING ANGULAR ADJUSTMENT OF THE HOUSINGS WITH RESPECT TO EACH OTHER FOR VARIABLE SPACING OF SAID OUTLET ENDS THEREOF FOR ADAPTION TO VARIABLE SPACED COWLING INLETS TO THE ENGINE; EACH OF SAID HOUSING HAVING A HEAT BULB MOUNTED THEREIN AND DIRECTED OUT SAID OPEN END THEREOF TO RADIATE HEAT UNTO THE ENGINE; EACH OF SAID HOUSINGS ALSO INCLUDING FAN MEANS TO PROPEL AIR PAST SAID BULB AND OUT SAID OPEN END TO THE ENGINE; THE OPEN END OF SAID HOUSINGS ADAPTED TO BE SUPPORTED ON THE COWLING ADJACENT SAID ENGINE; SAID BRACKET MEANS BEING ATTACHED TO THE ENDS OF SAID ELONGATED HOUSINGS OPPOSITE SAID OPEN END FLEXIBLE SUSPENSION MEANS TO SUPPORT SAID OPPOSITE ENDS OF SAID HOUSINGS; BAFFLE MEANS AROUND EACH OF SAID HOUSINGS ADJACENT SAID OPEN ENDS AND RADIATING THEREFROM TO CLOSE OFF THE PERIPHERAL AIR INLET AREA TO SAID ENGINE COWLING; AND VARIABLE AIR INLET MEANS TO EACH OF SAID HOUSINGS TO MAKE OPTIMUM USE TO RADIANT HEAT AND CONVECTION-CONDUCTION HEAT DEPENDING UPON AMBIENT TEMPERATURE CONDITIONS.