. American engineer . uring Brlcl< Arch Tubes. self-feed type. The mandrel used with the expanders shown inFigs. 18 and 19 is illustrated in Fig. 22, and is operated with along stroke riveting hammer. A proposed setting of brick arch tubes is shown in Fig. 23. away from the fire as quickly as possible. This is more desir-able with a shallow depth Tubes are swaged down onboth ends to permit using as small a hole as possible, and atthe same time one size roller expander may be used for both January, 1913. AMRRICAN ENGINEER. 29 ends. Ill using the rullcr cxpaiiders a copper ferrule m
. American engineer . uring Brlcl< Arch Tubes. self-feed type. The mandrel used with the expanders shown inFigs. 18 and 19 is illustrated in Fig. 22, and is operated with along stroke riveting hammer. A proposed setting of brick arch tubes is shown in Fig. 23. away from the fire as quickly as possible. This is more desir-able with a shallow depth Tubes are swaged down onboth ends to permit using as small a hole as possible, and atthe same time one size roller expander may be used for both January, 1913. AMRRICAN ENGINEER. 29 ends. Ill using the rullcr cxpaiiders a copper ferrule must beplaced in the threaded plug hole in the outside sheet to preventthe threads from being injured by the expander guide. The sectional expander for seating the copper ferrule in theflue sheet, which can be used only from the firebox side of thesheet, is shown in Fig. 24. As previously noted the mandrelshown in Fig. IS is used with this expander. A roller expander of the self-feed type, used for both ends 8 3egmenfs. far Fhf Spring 1 LZS orKubberKi^ Cj—LT ifFor Coif Spring fhfe: Coil spring segmenf retainer preferredbufofnerwrmsha^inggroore fosu/^xlI I be accept able f«-|<—/—jj Grind off sharp„# i corners on inside. -Z-—-H Sfraighi- Sfeef. Temperec/. Fig. 24—Straight Sectional Expander for Bricl< Arch Tubes. of arch tubes, is shown in. Fig. 25. With this tool it is some-times necessary to have a short or donkey mandrel with alarger diameter at the small end to prevent the end of the man-drel from extending so far through the expander as to bearagainst tubes having a short radius. The beading tool used onboth ends of the arch tubes is shown in Fig. 26. Gages are provided for nearly all of the tools illustrated. Thisis to insure the tools being uniformly made. Gages are fur-nished to the manufacturers on application, but in connection
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
