. Railway mechanical engineer . riveting. A detailed statement of the cost of doing thiswork is given in Table I. Another typical operation to which spot welding has beenapplied is making the tops for water glass lamps. Thesewere formerly soldered at a cost of $ per thousand forlabor and $.40 for material. The same quantity can be Fig. 2—Attachment for Welding Split Keys shape as the end of the cotter. Above each of the recessesis a spring which holds the parts when they are placed inthe slots. At each revolution of the cam shaft the disc isadvanced the distance between the slots by a ratc
. Railway mechanical engineer . riveting. A detailed statement of the cost of doing thiswork is given in Table I. Another typical operation to which spot welding has beenapplied is making the tops for water glass lamps. Thesewere formerly soldered at a cost of $ per thousand forlabor and $.40 for material. The same quantity can be Fig. 2—Attachment for Welding Split Keys shape as the end of the cotter. Above each of the recessesis a spring which holds the parts when they are placed inthe slots. At each revolution of the cam shaft the disc isadvanced the distance between the slots by a ratchet oper-ated by an electrically controlled valve, thus bringing the. Machine Arranged for Spot Welding Locomotive Jackets welded at a cost of $.85 for labor. On this job there is anadditional saving in the material from which the parts aremade. When solder was used it was necessary to make thetops of tin, but sheet iron can now be used. The cost ofother t>-pical parts are tabulated in Table II. two pieces making up the key into position between theelectrodes. A contact is then made and the parts are weldedafter which the ratchet advances them one notch welded cotter then passes over an opening in the sta-tionary disc where a finger on a rod attached to a lever on March, 1919 RAILWAY MECHANICAL ENGINEER 153 the upper arm of the machine strikes it, causing it to dropinto the receptacle beneath. The parts can be welded asfast as the operator can feed them. As many as 5,000cotters have been made in seven hours. Another important job for which special attachmentshave been made is the weldini; of locomotive jackets. Thelarge sheets are placed
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
