861. Whitaker, A. Jan. 16. Transferring articles to or from trains in motion. -Apparatus for exchanging staffs or tablets while trains are in motion consists of a combined receiver and holder mounted on a vertically and laterally sliding bar on the engine and separate receiver and holder mounted on two arms on a rotating post which are automatically returned to a position parallel to the track after the tablets are received or delivered or exchanged. The tablets or staffs are carried in a pouch provided with a metal ring. The tablet holding and receiving apparatus, Fig. 7, consists of a casting b with two jaws c, d with a flared opening between them provided with two or more spring-operated catches e, e', to prevent the tablet-carrying ring from falling out after it is caught. Blocks of india-rubber c<4>, g serve as buffers to prevent injury to the tablet. The tablet to be set down is held on the projection b<4> by the arms b<2> which are mounted on lateral projections and are pressed inwards by springs so as to hold the tablet vertically. Modifications are made for holding and receiving a staff, consisting chiefly of the provision of a pair of spring jaws at a suitable distance below the casting b to receive the staff itself. These jaws are also fitted with a rubber buffer. The complete apparatus is shown in Fig. 2. A combined receiver and holder, Fig. 2, is mounted on a bar i by a bolt through the hole b<5>. The bar i slides in a fixed guide j and is held in its two end positions by a spring pin. To ensure that the height of the bar i above the rails is not altered by the variable loading of engine or tender, a set of compensating-levers are inserted between the axle-box and the guide j, which is then made movable vertically. A receiver p is fitted to the upper, and a holder q to the lower, of two arms n, o of a post l which is rotatable in the pillar m, and is held in position at right-angles or parallel to the track by a detent r entering a rounded notch in the collar m'. To exchange tablets, the arms n, o are swung out and the arm i is pushed out so that the tablet-rings a' may enter their respective receivers and the tablets be oxchanged. The blow so caused is sufficient to disengage the detent r from the collar m<1>, and the weight u then descends and completes the movement of the arms n, o. At the ends of a section of single line, a receiver or holder alone is mounted on a post. In order automatically to replace the holder when the tablet is removed, it is attached to a counterweighted lever o<1>, Fig. 5, which is pivoted on a pin o<2> to the arm o, and the other end of which serves as detent in the collar m<1>, and falls away when the tablet is removed. In place of the weight on a wire, bevel-wheels with a weighted crank may be used so that, when the detent is removed, the crank is revolved and moves the arms to the inoperative position.