The Locomotive . d or re-tarded the cut-off, according to the direction of movement of the keyin the helical slot. It also decreased or increased the valve lift in thatit brought the cam toward either the long or short radius of the ec-centric. Fine performance was obtained by this mechanism, as was shownby indicator cards taken by The Hartford Company in 1920 when itwas called upon to replace a fractured main bearing. 42 THE LOCOMOTIVE April, Explosion Caused by Tubes Pulling Out AN explosion that started when eight tubes in the lowest row of awater tube boiler were pulled from the front head
The Locomotive . d or re-tarded the cut-off, according to the direction of movement of the keyin the helical slot. It also decreased or increased the valve lift in thatit brought the cam toward either the long or short radius of the ec-centric. Fine performance was obtained by this mechanism, as was shownby indicator cards taken by The Hartford Company in 1920 when itwas called upon to replace a fractured main bearing. 42 THE LOCOMOTIVE April, Explosion Caused by Tubes Pulling Out AN explosion that started when eight tubes in the lowest row of awater tube boiler were pulled from the front header, damagednot only the boiler but destroyed its setting, tore loose all pipeconnections, parted the breeching, and blew a hole in a brick wall ofthe boiler room of Consolidated Ice Company, Inc., at Monroe, La.,September 6, 1927. Fortunately, no one was near the boiler when itlet go. The explosion was cumulative in effect, in that when the bottomrow of tubes pulled loose the energy released by escaping steam and. water raised the boiler from its setting and allowed it to crash down-ward four feet in such a way as to throw its full weight onto tubes whichfell across a brick baffle wall about midway the furnace. Needless tosay, this added considerably to the damage. Both chief engineer and watch engineer had left the boiler room afew seconds before the explosion. They succeeded in closing the stopvalve to prevent another boiler on the line from discharging steamthrough the damaged header. While the boiler was twenty years old it was apparently in goodcondition before the accident. Within the past two years it had beencompletely retubed and neither headers nor drums showed defects 1928. THE LOCO M O T I V E 43 when inspected. However, the lowest row of tubes had been the lastto be replaced and, when installed, their ends had not been flared. Thisis believed to have allowed them to blow out under pressure. Direct property damage, covered by a Hartford policy, amountedto $3,
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Keywords: ., bookauthorhartfordsteamboilerin, bookcentury1800, bookdecade1860
