. American engineer . Fig. 11- Exper Gage, f^ Sheef Type of Straight Sectional Expander □;tp For Haf spring ring strated that it is better to make as many sides on the mandrelas the size of the tool will permit. It was found with the oldstyle round mandrel that the segments rode together and wouldnot keep separated, two or more butting together in service; ^S—\For Coif Spring \ -z^^-—H Pros5er Expander Tool Sfeef, Tempered ing Expander for Tubes 2. 2| 4 and22 In. in Diameter. ers doing the duty of threads. Three different sizes of toolsare shown in the table. The mandrel
. American engineer . Fig. 11- Exper Gage, f^ Sheef Type of Straight Sectional Expander □;tp For Haf spring ring strated that it is better to make as many sides on the mandrelas the size of the tool will permit. It was found with the oldstyle round mandrel that the segments rode together and wouldnot keep separated, two or more butting together in service; ^S—\For Coif Spring \ -z^^-—H Pros5er Expander Tool Sfeef, Tempered ing Expander for Tubes 2. 2| 4 and22 In. in Diameter. ers doing the duty of threads. Three different sizes of toolsare shown in the table. The mandrel is turned by an airmachine. The manner of setting superlieater tubes is shown in Fig. 17. T. I V ii — i< ^Ji Oage - /J Sheef —Flue Flaring Tool, Used Preparatory to Prosser-Expanding. therefore the octagonal mandrel was adopted. A long strokeriveting hammer is used with these mandrels. A self-feed roller expander, which is used for tightening fluesin the front flue sheet is shown in Fig. 16. It is self-feeding byreason of having the center lines of the rollers set at a slight I Fig. I!—Beading Tool for Boiler Tubes. The specifications for these tubes, as w-ell as for the tubes forbrick arches, should include all the requirements called for inthe article on page 414 of the August, 1912, number of the Amer- IaNI ARY. 1913. AMllRle AX I-:X(;iXRRR. 27 lean l:ii,^iiu-cr. Tlii same applies to copper ferrules. The tubesare ordered in. longer than the distance over the outside ofthe tube sheets, and are then cut so as to show ;4 in projectionover each tube sheet for beading. The extra lyi in. of length fbrS^m/w Uitd mfh A B Numtvcf Tool 1 Erpandtrs 1 f-l. P-i. P-3
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
