Patent ID: 8753111

Claim:
A torch, comprising: a torch body having; an upstream cavity, a channel disposed downstream of said upstream cavity, a mixture cavity separating said channel into a first channel and a second channel, said first channel disposed to receive a flow from said upstream cavity and said mixture cavity has a plurality of conical bores through a sidewall of said mixture cavity to permit a flow of air into said mixture cavity, and a tube connection portion downstream of said second channel, said tube connection portion has a bore to receive a flow from said second channel and direct said flow from said second channel to an exit of said tube connection portion; a tip orifice structure inserted into said upstream cavity, said tip Orifice structure having a bore through is center thereof, said bore having a first diameter and where said bore directs a fuel to said mixture cavity via said first channel; and a tube coupled to said tube connection portion which receives said flow from said tube connection portion, and has an inner diameter, where said tube delivers said flow from said tube connection portion to a flame at an exit of said tube; wherein a diameter of said second channel is greater than a diameter of said first channel, wherein the ratio of said first diameter to said inner diameter of said tube is in the range of 5 to 7%, wherein said fuel is acetylene, and wherein said bore in said tube connection portion has an expansion cavity in a downstream portion of said bore in said tube connection portion.