. Sheet metal workers' manual; a complete, practical instruction book on the sheet metal industry, machinery and tools, and related subjects, including the oxy-acetylen welding and cutting process . e 247.—Oxy-Acetylene Welding Blowpipe for Continuous LightWork, also for Lead Burning. of more skillful manipulation. This size blowpipe is alsoto be used for lead burning. A number of blowpipe tips of different sizes are usuallyfurnished with welding blowpipes, for use on differentclasses of work. These tips are constructed of brass orcopper and are interchangeable. Full instructions forthe select
. Sheet metal workers' manual; a complete, practical instruction book on the sheet metal industry, machinery and tools, and related subjects, including the oxy-acetylen welding and cutting process . e 247.—Oxy-Acetylene Welding Blowpipe for Continuous LightWork, also for Lead Burning. of more skillful manipulation. This size blowpipe is alsoto be used for lead burning. A number of blowpipe tips of different sizes are usuallyfurnished with welding blowpipes, for use on differentclasses of work. These tips are constructed of brass orcopper and are interchangeable. Full instructions forthe selection of tips for different operations are furnishedby the manufacturers. 316 SHEET METAL WORKERS MANUAL, Acetylene Regulators,- as illustrated in Figure 248,regulate the pressure of the acetylene from the source ofsupply. Regulators used in connection with gas cylindersare fitted with two pressure gauges. The inlet, or high-pressure, gauge indicates the approximate contents ofthe cylinder, and the outlet,.or working pressure, gaugeindicates the acetylene pressure in the hose line. Theworking pressure is regulated by an adjusting screw inthe acetylene reducing valve. The pressure can be fur-. Figure 248.—Automatic Constant Pressure Acetylene , Union Nut Securing Regulator on Acetylene Cylinder Valve; N3Acetylene Regulator Outlet Needle Valve; 0, Acetylene Pressure Regu-lator Screw ; P, Low or Working Pressure Gauge ; Q, High or CylinderPressure Gauge; R, Acetylene Reducing Valve ; 8S Acetylene Hose Nip-ple ; V, Wrench on Acetylene Cylinder Valve ; W_, Acetylene CylinderValve ; Z3 Gland Nut on Acetylene Cylinder Valve. ther regulated by an outlet needle valve at the hose con-nection. The oxygen regulator, connected to the valve of theoxygen cylinder, is essentially the same as the acetyleneregulator, excepting the pressure gauges, which are de-signed for the higher pressure at which oxygen is used. Welders goggles, which are usually furnished with allwelding outfits
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