Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . Figure 139 The Perry Collard Co. obtained by hand riveting. All fire box seams inside andoutside are now countersunk and also all rivet headswhich interfere with other parts or must be countersunk 170 Flush rivets. for clearance or for appearance. This style of rivet headis seen in Fig. 140. It is curved at A about as shown,which makes the head stronger. Many people counter-sink all mud ring rivets, using this style of head. Where it is absolutely necessary to have the rivetheads perfectly f
Locomotive boiler construction; a practical treatise for boilermakers, boiler users and inspectors .. . Figure 139 The Perry Collard Co. obtained by hand riveting. All fire box seams inside andoutside are now countersunk and also all rivet headswhich interfere with other parts or must be countersunk 170 Flush rivets. for clearance or for appearance. This style of rivet headis seen in Fig. 140. It is curved at A about as shown,which makes the head stronger. Many people counter-sink all mud ring rivets, using this style of head. Where it is absolutely necessary to have the rivetheads perfectly flush, they are made like Fig. 141. Asit is almost impossible to have just enough material to. A hand-driven rivet. fill up the rivet holes, one or the other side of these headsis apt to come a little full, and therefore the rivet mustbe chipped off flush. This is usually so noted on thedrawings. Wherever it is possible to drive a rivet by machine,it should be done, but there are cases where it cannot bedone profitably, as for instance on the back head. Thishead is entered into the side and crown sheets, and thenthese rivets and also those in the fire door are handdriven. They are entered into the sheet from the inside, 171 Holding work. and while the rivet is being held at A the head is ham-mered down as seen in Fig. 142. Various Operations on the RivetingMachine. We will now consider the method of hanging aboiler over the riveter stake of a large hydraulic rivetingmachine. A single course of a locomotive boiler is veryreadily picked up and dropped down over a riveter stake,but a large boiler like Fig. 143 is not so easily handled.
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Keywords: ., bookcentury1900, bookdecade1910, bookidlocomotivebo, bookyear1912
