Fuel-air mixer

Claim 1

AN AIR-GAS MIXER WITH MEANS FOR CHOKING COMPRISING: (A) AN ELONGATED FITTING HAVING A BORE EXTENDING AXIALLY THERETHROUGH; (B) A RADIALLY EXTENDING PASSAGEWAY THROUGH THE WALL OF SAID FITTING FOR PASSAGE OF AIR FROM OUTSIDE THE FITTING TO WITHIN THE BORE; (C) A NIPPLE HAVING A GAS SPUD MOUNTED ON THE OUTLET END THEREOF RECEIVED IN SAID BORE WITH THE GAS SPUD DISPOSED ADJACENT THE RADIALLY EXTENDING PASSAGEWAY, SAID NIPPLE BEING MOVABLE AXIALLY IN SAID BORE BETWEEN A FIRST FIXED POSITION AND A SECOND FIXED POSITION, THE NIPPLE IN SAID FIRST POSITION OBSTRUCTING AIR PASSAGE THROUGH SAID PASSAGEWAY FOR PROVIDING THE CHOKING ACTION AND IN THE SECOND POSITION PROVIDING LESS OBSTRUCTION TO SUCH AIR PASSAGE FOR NORMAL MIXING; (D) MEANS FOR RELEASABLY SECURING THE NIPPLE IN EACH ONE OF SAID POSITIONS, SAID RELEASABLE SECURING MEANS BEING RESPONSIVE TO AN AXIALLY DIRECTED FORCE MANUALLY APPLIED TO THE NIPPLE TO RELEASE THE NIPPLE FROM SECURED CONDITION IN ONE OF SAID POSITIONS PERMITTING SHIFTING OF THE NIPPLE TO THE OTHER OF SAID POSITIONS AND BEING RESPONSIVE TO PLACEMENT OF THE NIPPLE IN SAID OTHER POSITION TO ACTUATE THE SECURING MEANS TO SECURE THE NIPPLE IN SAID OTHER POSITION.