. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ough to allow theball to come through the projection ofthe lug, say about as much as the worldwould, if pushed into an open socket witha little more than the arctic circleing. When piers are brought to- gether the lugs engage and the balls arepushed back slightly against their ownsprings as they enter a guide groove,rid r a flat area on the i uid drop into a hole in the spring pushes on the ball from be-hind and there it rests in the shallow lit-ilc securing the couplings lock
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ough to allow theball to come through the projection ofthe lug, say about as much as the worldwould, if pushed into an open socket witha little more than the arctic circleing. When piers are brought to- gether the lugs engage and the balls arepushed back slightly against their ownsprings as they enter a guide groove,rid r a flat area on the i uid drop into a hole in the spring pushes on the ball from be-hind and there it rests in the shallow lit-ilc securing the couplings the ball is holding the couplings■1. it is pulling the face of the gas-kets together to prevent leakage, and itis capable of taking up wear. This isby simply stepping the hole intowhich the ball locks. The hole is aboutyA in. in diameter and J4 in. deep. An-other hole, slightly eccentric is drilleddown about Y& in. and you have a de-pression something like a circular sinkwith a circular draining shelf attached,or like what some people would call asit/ bath, only very much smaller of. GOLDS BALL LOCK STEAM HEAT COUPLING. ling No. 701 and differs from the typewe described on page 129 of our March1911 issue, principally in this matter ofthe lock. On the side lug of the coupling there isa projection having a deep groove. Thisengages with a similar projection andgroove in the other coupling. This isusual practice, but now comes the balllock to hold the couplings together sothat they do not tend to spring up andso uncouple, and at the same time theball lock puts pressure on the faces ofthe gaskets so that they are drawntightly together all the time and so donot leak, and the wear of the faces isautomatically taken up. That is the busi-ness of the lock, now note how effec-tively it does it. On the outer end of the lug where theprojection and groove are. a hole isdrilled for the insertion of a plug, andthe plug has an internal square like awash out plug in a boiler where a p
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