Handy man's workshop and laboratory . This blow-pipe is in fact amodification of the annularcompound blow-pipe. A pipewhich is attached by meansof a pivoted connection to astandard is turned in a right-angled elbow at its outer ex-tremity, and is fixed to a short=7. sleeve, which is somewhatcontracted at its outer slide is provided with aspring-gib, to insure a certainamount of friction on the pipe, and a set-screw to fix it at anypoint. This slide supports the air-tube and the ball. The sleeveand air-pipe are axially in line, so that when the nozzle is movedinto the sleeve their apert
Handy man's workshop and laboratory . This blow-pipe is in fact amodification of the annularcompound blow-pipe. A pipewhich is attached by meansof a pivoted connection to astandard is turned in a right-angled elbow at its outer ex-tremity, and is fixed to a short=7. sleeve, which is somewhatcontracted at its outer slide is provided with aspring-gib, to insure a certainamount of friction on the pipe, and a set-screw to fix it at anypoint. This slide supports the air-tube and the ball. The sleeveand air-pipe are axially in line, so that when the nozzle is movedinto the sleeve their apertures are truly concentric, and when inthe position shown the larger part of the nozzle should fit thesleeve tightly. The ball collects the moisture, the air passing down the tubeand upward through the passage. The best size for the air-pit for all purposes is 1/48 annular space for the exit of gas around the air-nozzleshould not be more than 1/100 inch in breadth. Gas is sup-plied through the tube and air through the Fig. 133—Blovvpipe HANDY MAN S WORKSHOP AND LABORATORY II5 When the parts are in the position shown, with the air andgas supply in proper proportion, a fine blue pencil from y^ to3 inches or more in length is produced. By sliding the air nozzle,back and using a strong blast, an intense solid flame is pro-duced capable of doing all that can be reasonably required. This blow-pipe when connected with the apparatus shown inFig. 132 seems to answer all the requirements for any purposewhatever. The weight on the gasometer may be reduced, whenthe gasometer may be filled with oxygen, and the operator willenjoy all the benefits of an oxyhydrogen jet, producing the lime-light, fusing refractory substances, and performing any of thebrilliant experiments consequent to the use of a compound blow-pipe. An instrument of this kind, when used for soldering, permitsthe use of both hands, which is a matter of no small moment. Work that is too large to be readily sol
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Keywords: ., book, bookcentury1900, bookdecade1910, booksubjectworkshoprecipes
