Ventilator for gas exhaust stacks

Claim 1

A VENTILATOR FOR A GAS EXHAUST STACK COMPRISING GAS PASSAGE MEANS MOUNTABLE ON A STACK FOR DIRECTING GASES EMANATING FROM A STACK UPWARDLY, FIRST DIVERTING MEANS SURROUNDING A PORTION OF SAID GAS PASSAGE MEANS AND EXTENDING ABOVE THEREOF TO PROVIDE A FIRST ENTRAINING ZONE, FOR DIVERTING AIR CURRENTS HAVING AN UPWARD COMPONENT OF FORCE, IMPINGING ON SAID GAS PASSAGE MEANS, UPWARDLY AND OUTWARDLY, SAID FIRST DIVERTING MEANS DISPOSED IN SPACED RELATION TO SAID GAS PASSAGE MEANS DEFINING AN AIR INLET CHANNEL FOR DIRECTING SAID SAAIR CURRENTS UPWARDLY THROUGH SAID FIRST ENTRAING ZONE, SECOND DIVERTING MEANS OVERLYING SAID FIRST DIVERTING MEANS IN SPACED RELATION THERETO PROVIDING A SECOND ENTRAINING ZONE FOR DIVERTING AIR CURRENTS FROLM SAID FIRST ENTRAINING ZONE OUTWARDLY TOWARD SAID SECOND ENTRAINING ZONE AND THIRD DIVERTING MEANS MOUNTED N SAID FIRST DIVERTING MEANS ADJACENT SAID SECOND ENTRAINING ZONE FOR DIRECTING AIR CURRENT IMPINGING ON SAID SECOND DIVERTING MEANS OUTWARDLY PAST SAID SECOND ENTRAINING ZONE.