Patent GB-190318651-A (GB)
Title: Improvements in and in connection with Railway Signalling.
Inventor: PHILLIPS THOMAS ERNEST RAYMOND
Filed: 1903-08-29
Granted: 1904-08-25
Abstract: 18,651. Phillips, T. E. R. Aug. 29. Signals on engines; contacts, mechanical; stopping engines and trains; indicators and repeaters, signal.-An automatic brakecontrolling mechanism, and an audible alarm mechanism on a locomotive are actuated from the permanent way, and a special valve and also an apparatus for controlling the permanent way signalling-mechanism at junctions are described. A bell Z, Fig. 3, or other audible alarm in the cab is actuated by a depending pivoted lever h from the permanent way through a cord a, Bowden wire, or the like. This lever h has a balance-weight arm f, and raises a pivoted piece d provided with a balance arm c', and a projection c, the whole being carried by a casting b fixed on the back part of the locomotive. Springs j, j<1> take the impact of the levers, and a stop k limits the motion in one direction. The brakecontrolling mechanism is fixed on a plate A, Fig. 2, on one or both sides of the front part of the locomotive and comprisesadepending pivoted lever C tilted from the permanent way, and actuating a weighted lever B by a projection B<2>, so that a horizontal lever D resting on the lever B falls into the vertical position shown in dotted lines, thereby actuating an ordinary cock E in connection with the vacuum or other brake, such as an electric brake. A guard X is provided for the lever D, and a weighted double-armed lever V, V<2> in contact with a pivoted lever W touching the lever D prevents accidental displacement of the lever B. The replacement of the lever D to release the brakes must here be effected by the driver descending from his cab, but a cord R from the cab may be carried over a wheel 0 fixed to the lever D by a pin P to effect the release ; or the wheel 0 may carry a lever 0<1> with a projection 0<2>, to be actuated by the lever D in descending, while the cord R acts through the projection O<2> to replace the lever D. In this case also the lever D engages with a notched lever N pivoted on the lever L, which is actuated by a piston J in a cylinder K connecting with the vacuum brake, thus preventing replacement of the lever D while any vacuum remains. Fixed tripping-levers p<1>, Fig. 7. or movable pivoted tripping-levers q, r, or combinations of these, are employed by the side of the permanent way, and the movable levers are actuated by wires from a cabin, a warning-bell S of the usual type being also provided. One higher lever operates the short brake-controlling lever, when in the upright danger position shown in Fig. 7 at the home, starting, or advance starting- signal, while the lower levers operate the longer bell or audible signal lever. The longer ]ever r is pulled down to the low level at line clear together with the other levers by the wire connecting to a lower point on it. Two levers only, to operate the bell-signal lever, are provided at the distant signal. The replacing-cord R may be dispensed with in the modification shown in Fig. 12, in which the lever D operates the spindle of a special valve shown in Fig. 9, comprising a disc x fixed on a squared portion of the valve-spindle w, and provided with a passage x<l>, which, on registering with the passage v in the valve casting t, opens the train-pipe F<1> to the atmosphere through the perforated screwed valve cover y. The cover y holds the disc x on its seating through a spring x<3>. A cylinder J', Fig. 12, connected to the train-pipe is provided, the piston K<1> being connected to a weighted pivoted lever z limiting the motion of the lever D by a projection I, and the raised piston K' prevents the replacement of the lever D in its horizontal position until the vacuum is destroyed. Levers V, W, as shown in Fig. 2, may also be employed in this case. In a further modification, the lever D may be dispensed with, the lever C being mounted on the spindle of the special valve described. A tripping-gear may be mounted as shown in Fig. 15 at loop lines and junctions to be actuated in conjunction with the wires 12, 13, 14, 15 from separate semaphores A weighted pivoted lever 3 has a connected bar 2, and similar levers 10, 11 are mounted on one spindle 9. When a lever is depressed, the bar 2 causes the tripping-levers to be actuated through a wire 6. The Provisional Specification states that the brake-controlling mechanism may be connected by a chain, cord, or the like to the controller or switch to cut off the steam or electric current simaltaneously with the application of the brakes.