. Electric railway journal . FIG. 1—DOOR SHAFT WITH PRESSED STEEL CLIP, SHAFT LEVER, ETC. J FIG. 2—BOTTOM DOOR GUIDE AND CATCH, STEP COUNTER-BALANCE SPRING, DOOR SHOE AND BALL BEARING; FIG. 3—WELDED CROSSHEAD FOR DOOR CONNECTING ROD; FIG. 4—CONTROL STAND By using ball bearings at both ends of the door shaft,three objects are attained: Easy running, flexible ad-justment to platform sag (whereas a straight bearingwould bind) and eventual renewal of the ball bearingalone without cutting the shaft or retainer. In ordinary construction, if a door warps it is al-lowed to drag along and make hard wor
. Electric railway journal . FIG. 1—DOOR SHAFT WITH PRESSED STEEL CLIP, SHAFT LEVER, ETC. J FIG. 2—BOTTOM DOOR GUIDE AND CATCH, STEP COUNTER-BALANCE SPRING, DOOR SHOE AND BALL BEARING; FIG. 3—WELDED CROSSHEAD FOR DOOR CONNECTING ROD; FIG. 4—CONTROL STAND By using ball bearings at both ends of the door shaft,three objects are attained: Easy running, flexible ad-justment to platform sag (whereas a straight bearingwould bind) and eventual renewal of the ball bearingalone without cutting the shaft or retainer. In ordinary construction, if a door warps it is al-lowed to drag along and make hard work for the opera-tor. In this construction the bottom door guide andcatch is furnished with a roller which gives an easybearing along the edge of the platform. The top ofeach door is held securely against the header by meansof a door shoe which gives a weathertight joint. Thebottom of each door is held securely against the plat-form by means of locking pins. Instead of using wood,the door tracks are of angle iron to i
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
