Improvements in and relating to Fog-signalling Apparatus for use on Railways and the like.

摘要

2624. Clongh, S., and Watson, H. Feb. 2. Detonator apparatus ; detonating signals; rods and wires for operating.-A detonator apparatus controlled by the signalman is released by a trainactuated trip gear to allow a counterweight to operate the detonator placing mechanism, which consists of an endless chain passing over two sprocket-wheels driven by a ratchet and pawl. When the signal is set to line clear,' the detonator on the rail is lifted by a finger controlled by the signal wire. The signal wire 2 passes to the counterweight 4, and the wire 11 connects the wire 2 to the quadrant 8 which is also connected to the wire 13 and the counterweight 12. The counterweight 12 is held up by the detent 24 until the latter is released by the engagement of the train wheels with the trip-plate 25A, which is thus rocked ; the counterweight is then free to take up the slack on the wire 11, as the signal lever is in the danger' position, and to move the quadrant 8 from the position shown in Fig. 6 towards the left of the Figure. The pawl 9 thus drives the ratchet 10 and the shaft 7 through a quarter revolution. The shaft 7 is geared through bevel-wheels to the sprocketwheel 17, on which the chain carrying the detonators 15 runs. The sprocket-wheels are constructed with spring-actuated clutch members which ensure correct placing of the detonators on the rail. Two hinged plates 20 serve to keep the detonators in place on the chain. A guide 26 supports the detonator on its passage to the rail, and a stop 27 prevents excessive movement by engaging a projection 15A on the detonator carrier. A finger 33, operated by the projection 31 on the quadrant 8, lifts the detonator from the chain when the quadrant is moved the first part of its stroke. Two detonators may be simultaneously placed by connecting two such apparatus together in various ways. A counter of ordinary construction may be placed in the cabin to show the number of detonators exploded.