Home › B › Blow-Pipe

Blow-Pipe

A tapering metal tube, used to direct the flame from a lamp or gas jet upon an article for soldering, annealing and similar purposes. Fig. 36 shows the automatic hand blow-pipe, which is used in connection with the foot-blower. One of the rubber tubes shown is connected to the blower and the other to the gas supply. It is self-adjusting, for both gas and air, requiring only a slight motion of the ever, shown under the thumb, to obtain instantly any flame from the smallest to the largest. Fig. 37 shows Poppen's patent soldering blow-pipe lamp. In this lamp the flame is made by igniting the fumes of the gasoline contained in the can and forced through the pipe, as shown in the illustration. Flame can be made any size. Unscrew top A, fill can one quarter with gasoline (this fluid gives best results), handle same as an ordinary blow-pipe. Blowing through pipe B causes the fluid in C to bubble, which separates the fumes from the fluid and at the same time forces them through pipe D to outlet E, then light wick at pipe G. For a small flame insert pin F in outlet E, which is also inserted to preserve the strength of fluid while the blow pipe is not in use.