Sealed annealing apparatus

Claim 1

A DEVICE FOR ANNEALING WORK IN A GAS ATMOSPHERE, IN THE OPENING OF A HIGH TEMPERATURE FURNACE, SAID OPENING HAVING A BOTTOM AND SIDE WALLS, SAID DEVICE COMPRISING AN OUTER CASING ADAPTED TO BE POSITIONED ON THE BOTTOM WALL OF THE CASING OPENING AND HAVING SIDE WALLS EXTENDING UPWARDLY FROM THE BOTTOM WALL OF THE CASING OPENING IN SPACED RELATION TO THE SIDE WALLS OF SAID OPENING, SAID SIDE WALLS OF THE CASING DEFINING, AT THEIR UPPER ENDS AN OPENING, AN INNER CASING ADAPTED TO BE POSITIONED WITHIN THE OUTER CASING THROUGH SAID OPENING, SAID INNER CASING HAVING A TOP WALL AND SIDE WALLS DEPENDING THEREFROM, A GAS INLET PIPE FIXED TO THE TOP WALL OF THE INNER CASING AND PROJECTING INTO THE INTERIOR OF THE INNER CASING, A COVER PLATE FOR THE OUTER CASING, COMPLEMENTARY MEANS ON THE UPPER ENDS OF THE SIDE WALL OF THE OUTER CASING AND ON THE PERIMETER OF SAID COVER PLATE FOR SEALING SAID UPPER END AND PERIMETER SAID COVER PLATE HAVING A MEDIAL OPENING, A SLEEVE FIXED TO THE COVER PLATE IN REGISTRY WITH THE OPENING THEREIN AND A GAS DISCHARGE PIPE SECURED TO THE SLEEVE AT A POINT SUBSTANTIALLY ABOVE THE POINT OF CONNECTION OF THE SLEEVE WITH THE COVER PLATE, SAID PIPE DISCHARGING INTO THE ATMOSPHERE, AND MEANS FOR CONNECTION OF THE GAS INLET PIPE TO A SOURCE OF SUPPLY OF GAS, WHEREBY GAS MAY BE PUMPED THROUGH SAID PIPE AND THUS THROUGH THE INNER CASING, BETWEEN THE INNER AND OUTER CASING WALLS AND THENCE BETWEEN THE SLEEVE AND GAS INLET PIPE AND OUT OF THE GAS DISCHARGE PIPE TO THE ATMOSPHERE.

Claim 2

A DEVICE FOR ANNEALING WORK IN A GAS ATMOSPHERE, IN THE OPENING OF A HIGH TEMPERATURE FURNACE, SAID OPENING HAVING A BOTTOM AND SIDE WALLS, SAID DEVICE COMPRISING AN OUTER CASING ADAPTED TO BE POSITIONED ON THE BOTTOM WALL OF THE CASING OPENING AND HAVING SIDE WALLS EXTENDING UPWARDLY FROM THE BOTTOM WALL OF THE CASING OPENING IN SPACED RELATION TO THE SIDE WALLS OF SAID OPENING, SAID SIDE WALLS OF THE CASING DEFINING, AT THEIR UPPER ENDS AN OPENING, AN INNER CASING ADAPTED TO BE POSITIONED WITHIN THE OUTER CASING THROUGH SAID OPENING, SAID INNER CASING HAVING A TOP WALL AND SIDE WALLS DEPENDING THEREFROM, A GAS INLET PIPE FIXED TO THE TOP WALL OF THE INNER CASING AND PROJECTING INTO THE INTERIOR OF THE INNER CASING, A COVER PLATE FOR THE OUTER CASING, COMPLEMENTARY MEANS ON THE UPPER ENDS OF THE SIDE WALL OF THE OUTER CASING AND ON THE PERIMETER OF SAID COVER PLATE FOR SEALING SAID UPPER END AND PERIMETER SAID COVER PLATE HAVING A MEDIAL OPENING, A SLEEVE FIXED TO THE COVER PLATE IN REGISTRY WITH THE OPENING THEREIN AND A GAS DISCHARGE PIPE SECURED TO THE SLEEVE AT A POINT SUBSTANTIALLY ABOVE THE POINT OF CONNECTION OF THE SLEEVE WITH THE COVER PLATE, SAID PIPE DISCHARGING INTO THE ATMOSPHERE, AND MEANS FOR CONNECTION OF THE GAS INLET PIPE TO A SOURCE OF SUPPLY OF GAS, WHEREBY GAS MAY BE PUMPED THROUGH SAID PIPE AND THUS THROUGH THE INNER CASING, BETWEEN THE INNER AND OUTER CASING WALLS AND THENCE BETWEEN THE SLEEVE AND GAS INLET PIPE AND OUT OF THE GAS DISCHARGE PIPE TO THE ATMOSPHERE.