Heat generators

Claim 1

A HEAT GENERATOR COMPRISING AT LEAST THREE CONCENTRICALLY ARRANGED CYLINDRICAL WALLS CONSTITUTING OUTER, INTERMEDIATE AND INNER WALLS, SAID WALLS DEFINING INNER AND OUTER PASSAGES OF ANNULAR FORM, SAID INNER WALL FORMING A COMBUSTION CHAMBER AND PROVIDING AN OUTLET AT THE UPPER END OF THE CHAMBER FOR PRODUCTS OF COMBUSTION, A CLOSURE MEMBER OF INVERTED FRUSTO-CONICAL FORM AT THE LOWER END OF SAID INNER WALL, A CYLINDRICAL BURNER CHAMBER BOUNDED BY A CASING FITTED TO SAID CLOSURE MEMBER, A CIRCULAR CLOSURE PLATE FOR THE LOWER END OF SAID CYLINDRICAL CASING, AN AXIALLY DISPOSED PRESSURE FED FUEL INJECTION ASSEMBLY SUPPORTED ON SAID CIRCULAR CLOSURE PLATE, A CLOSURE PLATE SPACED BELOW THE LOWER END OF SAID CYLINDRICAL CASING FOR SAID OUTER CYLINDRICAL WALL, AN ANNULAR CLOSING MEMBER BETWEEN THE TOP END PORTIONS OF THE OUTER AND INNER CYLINDRICAL WALLS, AN ANNULAR CLOSURE MEMBER FOR THE LOWER END OF THE SAID INTERMEDIATE WALL AND SAID CIRCULAR PLATE, MEANS FOR ADMITTING AIR TO THE OUTERMOST ANNULAR PASSAGE, SAID OUTERMOST ANNULAR PASSAGE COMMUNICATING WITH THE INNERMOST ANNULAR PASSAGE, SAID INNER WALL HAVING VANED SLOTS FOR THE ADMISSION OF AIR FROM SAID INNER ANNULAR PASSAGE TO SID COMBUSTION CHAMBER, SAID FRUSTO-CONICAL CLOSURE MEMBER HAVING PERFORATIONS FOR ADMISSION OF AIR TO SAID COMBUSTION CHAMBER AND CIRCUMFERENTIALLY ARRANGED VANED SLOTS FORMED IN SAID CYLINDRICAL CASING FOR THE ADMISSION OF AIR TO SAID PRESSURE FED FUEL INJECTION ASSEMBLY, AND A CONNECTION FOR A SOURCE OF HIGH PRESSURE AIR TO THE MEANS FOR ADMITTING AIR, THE VANES IN THE SLOTS IN THE INNER WALL OF THE COMBUSTION CHAMBER BEING INCLINED IN THE OPPOSITE DIRECTION TO THE VANES IN THE SLOTS IN THE CYLINDRICAL CASING.