Tilting crucible with smoke seal means

Claim 1

APPARATUS FOR REFINING CRUDE IRON COMPRISING A TILTABLE CRUCIBLE HAVING A PASSAGE OPENING FORMED IN AN UPPER PORTION THEREOF AND FIRST SMOKE-SEAL MEANS FORMED AROUND SAID PASSAGE OPENING, FLUE MEANS MOUNTED ABOVE SAID CRUCIBLE IN SPACED-APART RELATION THERETO FOR DISCHARGING SMOKE THEREFROM AND HAVING A LOWER FLUE OPENING AND SECOND SMOKE-SEAL MEANS FORMED AROUND SAID LOWER FLUE OPENING, A HOLLOW COVER HOOD HAVING LOWER AND UPPER OPENINGS, SAID LOWER HOOD OPENING HAVING THIRD SMOKE-SEAL MEANS FORMED THEREAROUND AND SAID UPPER HOOD OPENING HAVING FOURTH SMOKE-SEAL MEANS FORMED THEREAROUND, SAID FIRST AND THIRD SMOKE-SEAL MEANS BEING COMPLEMENTALLY FORMED AND SAID THIRD SMOKESEAL MEANS HAVING A FIRST PORTION ENGAGEABLE WITH A SIDE OF SAID CRUCIBLE AND A SECOND PORTION CONNECTED TO SAID FIRST PORTION, FORMING AN ANGLE WITH RESPECT THERETO, AND ENGAGEABLE WITH THE TOP OF SAID CRUCIBLE AND SAID SECOND AND FOURTH SMOKE-SEAL MEANS BEING COMPLEMENTALLY FORMED AND HAVING AN INCLINATION TO THE HORIZONTAL WHEREBY SAID HOOD IS ADAPTED TO BE INSERTED IN WEDGE-LIKE FASHION BETWEEN SAID CRUCIBLE AND SAID FLUE, AND MEANS MOUNTING SAID HOOD FOR HORIZONTAL MOVEMENT BETWEEN (A) A SMOKE-CONDUCTING POSITION IN WHICH SAID FIRST AND THIRD SMOKE-SEAL MEANS ARE IN ENGAGING RELATION, SAID LOWER HOOD OPENING AND SAID PASSAGE OPENING ARE IN SMOKE-CONDUCTING RELATION, SAID SECOND AND FOURTH SMOKE-SEAL MEANS ARE IN ENGAGING RELATION AND SAID UPPER HOOD OPENING AND SAID LOWER FLUE OPENING ARE IN SMOKE-CONDUCTING RELATION AND (B) A CRUCIBLE-ACCESS POSITION IN WHICH SAID COVER HOOD IS HORIZONTALLY OFFSET FROM SAID SMOKE-CONDUCTING POSITION.