Transcription of MODEL BOILERS - John-Tom
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MODEL BOILERS - John-Tom
MODEL BOILERS . A booklet devoted to the construction of Get stampings rather than castings, as the MODEL BOILERS may well open with a few first are more homogeneous, and therefore cautionary words, as the dangers connected can be somewhat lighter. with steam-raisers are very real; and though Flanging boiler Ends MODEL - boiler explosions are fortunately rare, if they do occur they may be extremely To make a good job, a plate for an end should disastrous. be screwed to a circular block of hard wood (oak or boxwood), having an outside diameter Therefore the following warnings: less than the inside diameter of the boiler (1.) Do not use tins or thin sheet iron barrel by twice the thickness of the metal of for BOILERS . One cannot tell how far the end, and a rounded-off edge. The plate internal corrosion has gone. The scaling must be annealed by being heated to a dull of 1/100 inch of metal off a "tin" is red and dipped in cold water.
MODEL BOILERS Figure 79 shows a great improvement in design. The boiler is entirely enclosed, except at one end, so that the hot gases get right
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