Vent cowl

Claim 1

A VENT COWL COMPRISING: (A) AN OPEN-ENDED METAL CYLINDER HAVING MEANS THEREON FOR SECURING SAID CYLINDER TO AN UPSTANDING PIPE WHEREBY TO PERMIT SAID CYLINDER TO SERVE AS AN EXTENSION THEREOF; (B) AT LEAST TWO BRACKETS SECURED TO THE EXTERIOR OF SAID METAL CYLINDER, SAID BRACKETS EACH CONSISTING OF A FLAT SHEET OF METAL HAVING TWO STRAIGHT PARALLEL EDGES AND HAVING TWO OPPOSED STRAIGHT EDGES NOT PARALLEL WITH ONE ANOTHER WHEREBY THE TWO PARALLEL EDGES ARE OF UNEQUAL LENGTH; (C) A FLANGE INTEGRAL WITH EACH OF SAID PARALLEL EDGES AND AT A RIGHT ANGLE RELATIVE TO THE SAID SHEET OF METAL AT THE POINT OF ATTACHMENT THERETO, SAID BRACKETS BEING SECURED TO SAID METAL CYLINDER ALONG A LONGITUDINAL SURFACE THEREOF BY RIVETS THROUGH EACH OF THE FLANGES INTEGRAL WITH THE SHORTER BRACKET EDGE; (D) A SECOND OPEN-ENDED METAL CYLINDER, SAID SECOND CYLINDER BEING OF A DIAMETER IN EXCESS OF THE DIAMETER OF SAID FIRST CYLINDER; (E) MEANS SECURING THE SAID SECOND CYLINDER CONCENTRICALLY ABOUT THE UPPER PORTION OF SAID FIRST CYLINDER TO SAID FLANGES INTEGRAL WITH THE LONGER EDGES OF SAID BRACKETS, SAID SECOND CYLINDER BEING SO MOUNTED THAT A PORTION OF EACH BRACKET AND FLANGE INTEGRAL WITH SAID LONGER EDGE EXTENDS THEREABOVE AND A PORTION OF SAID SECOND CYLINDER EXTENDS ABOVE THE UPPERMOST EDGE OF SAID FIRST CYLINDER WHILE A LARGER PORTION THEREOF EXTENDS BELOW THE UPPERMOST EDGE OF SAID FIRST CYLINDER; (F) A TOP CAP OF A GENERALLY DISH-SHAPED CONFIGURATION AND OF LARGER DIAMETER THAN SAID SECOND CYLINDER, SAID TOP CAP HAVING A VERTICAL ANNULAR TRUNK IN AN AREA SPACED FROM THE OUTERMOST EDGE THEREOF, SAID TRUNK BEING OF SUBSTANTIALLY THE SAME DIAMETER AS SAID SECOND CYLINDER; (G) AND MEANS SECURING SAID TOP CAP AT THE VERTICAL ANNULAR TRUNK THEREOF TO SAID PORTIONS OF SAID FLANGES OF SAID BRACKETS EXTENDING ABOVE SAID SECOND CYLINDER WHEREBY SAID TOP CAP IS POSITIONED OVER THE SAID SECOND CYLINDER WITH SUFFICIENT SPACE BETWEEN THE LOWERMOST SURFACE OF THE SAID TOP CAP AND THE UPPERMOST EDGES OF SAID SECOND CYLINDER TO PERMIT GAS TO PASS THEREBETWEEN.