A New Variable Jet Blowpipe.

JSGT 1918 V02 T030-T032

In lampworking processes it is often necessary to change quickly from a large to a small flame or vice versa, and to do this it is essential to change the size of the air jet, as it is impossible to get a large and a small flame satisfactorily with the same jet. Attempts have been made at various times to construct a blowpipe which would allow a quick and easy change from one size of jet to another, but none of these blowpipes seemed to the writer to be entirely satisfactory. In the new variable jet blowpipe three separate jets are provided, and the whole instrument has been arranged to follow as nearly as possible the lines of the standard blowpipe.

S. English