Patent GB-137044-A (GB)
Title: Devices for Controlling the Slackening of Railway-trains.
Inventor: RODOLAUSSE ELOI
IPC: B60T17/22
Filed: 1919-12-22
Abstract: 137,044. Rodolausse. E. Dec. 21. 1918. [Convention date]. Track apparatus for stopping trains.-A catch, on a weighted brake valve lever is released by an electro-magnet, the circuit to which is controlled by a switch comprising two movable contact members, one of which is set in accordance with the speed of the train and the other is moved from its normal position according to the distance the train travels beyond the contact members on the track by which the apparatus is put in action. The track contacts may be controlled by the signals or may be independent. (According to the Specification as open to inspection under Sect. 91 (3) (a), switches closed by explosion of a detonator on the rail may serve to put the train-stopping apparatus in action). Figs. 1, 3, and 7 show two forms of apparatus for completing the circuit to the magnet 32 in order to release the lever 31 for opening the brake valve 26. A centrifugal governor 1 moves a disk 3 along the spindle 2. By means of a conductor 11 the disk 3 is connected in the magnet circuit. A drum 6 with an adjustable helical rib 7 is adapted to be driven from the spindle 2, but is normally held out of gear by a lever 18 engaging a notch in the disk 20. When a danger signal is passed, the magnet 21 is energized by current from a battery on the track collected from a double ramp through two collecting brushes, and the weight 16 moves the drum so as to engage the gears 14, 15, which then cause the drum 6 to move proportionally to the distance travelled by the train, and if the speed is higher than that allowed at any point, the helical rib 7 meets the disk 3 and closes the circuit to the magnet 32. A similar drum 8 is controlled by a magnet 43 when two brushes engage a single ramp at a permanent control point. A straight portion 10 of the rib 9 serves to control the train at the prescribed speed during a desired lapse of time. Fig. 7 shows a speed-indicating finger 51 which co-acts with a finger 53 moved by means of a pinion 56 from a rack bar 55 which is moved bv a helix 52 against the action of a spring 57. The helix 52 is moved and controlled similarly to the drums 6, 8. In a further modification, the distance-controlled finger is moved by a chain which is coiled on to a drum driven by a gear wheel corresponding to the wheel 16, Fig. 1. The Specification as open to inspection under Sect. 91 (3) (a) describes two forms of electric contact adapted to be closed bv explosion of a detonator. These switches, which are shown in Fig. 11 (Cancelled) and Fig. 12 (Cancelled), are supported on the locomotive near the tread of the leading wheel so as to be acted on by the force of the explosion. A closed metal box, carried by a rod 81, has springs 79. 80 holding its walls apart. The wall 75 carries an insulated terminal with a rack 78, and the wall 80' carries a disk 83 in a bearing 82. An explosion causes the walls to approach, and the ratchet on the disk 83 engages the rack 78 and completes the circuit which remains closed for a prolonged interval owing to the inertia of the disk, which is rotated as the walls are restored to their normal position. Fig. 12 (Cancelled) shows a tapered cup provided with a spring-pressed plug 83<1> which is forced outwards by the explosion against a fixed terminal 85. This subject-matter does not appear in the Specification as accepted.