Patent GB-190800763-A (GB)
Title: Brake or Retardation Mechanism and such like
Inventor: ROCHE DAVID
Filed: 1908-01-13
Granted: 1908-11-26
Abstract: 763. Roche, D. Jan. 13. Brakes.-In vehicle wheel or track brakes, and similar mechanism in which the brake blocks are applied by a crank on a rotary shaft, the crank is arranged to come into alinement with spring telescopic pushrods when the brakes are applied. Means for applying the brakes by hand from opposite corners of the vehicle, or by apparatus on the permanent way of railways, are also described, and the push-rods are adjustable for wear. The cross-shaft A is turned by levers E having ends of the same shape as the cranks B, to which they are secured, on one or both sides of the cross-shaft, by the pivots which secure the pushrods C. The push-rods are tubular, and have sliding plungers D provided with adjustable nuts D<2>, between which and collars C' on the rods C, springs D' are inserted. When the brakes are fully on, the cranks B come into alinement with the push-rods C. The levers E have outward extensions E', which engage with rests F, similar to those described in Specification No. 11,238, A.D. 1905, secured to a shaft F<2> extending across the vehicle, the rests F having pulleys F<1> round which are passed cords H<1>, secured at one end to pivoted levers H and having their free ends located at the right-hand corners of the vehicle. To enable this to be effected on the other side of the vehicle, since both levers E are at one end of the vehicle, the cord H<1> on that side is passed round an additional pu ley. To apply the brakes, one of the cords H<1> is pulled so as to cause a roller H<3> on the end of the lever H to contact with and raise the lever E, after which the rests F are turned, the brakes being then applied by releasing the cord. The brakes are released and the levers E are restored to their rests by turning up one of the levers H. The rack- and - pawl locking - mechanism described in the Specification referred to above may be used in conjunction with this mechanism. To enable the brakes to be applied from the track, a lever J, Fig. 3, having a V-shaped recess J<4>, is pivoted to the vehicle at one end, and at its other end is provided with a slot J<2>, which engages with a pin F' on a lever F<3> secured to the shaft F<2>. A lever JJ, provided with a roller JJ<2> engaging the recess J<4>, moves the lever J so as to trip the rests F when the lever JJ is displaced by a projection on the track as described in Specification No. 11,238, A.D. 1905. The trip may be set from the engine or guard's van by means of a sliding rod KK, which is pressed down so as to strike an extension K<2> on the shaft K of the trip. The trip consists of a T-shaped projection on a shaft, by which it is capable of being turned up against a stop ; but if it is required to act in both directions, a second T-piece is mounted on another shaft geared to the first one. The trip may be operated from the signal box by means of a chain passing over a pulley on the shaft K, and a similar shaft in the signal box or just outside it. For use with slipper brakes, the push-rods C have extensions CC, Fig. 4, connected by links CC<1> to the brake-shaft hanger, the brake being applied by a lever secured to the shaft A or an extension B<1> of the crank B. The plunger D is prevented from turning by a pin D' sliding in a slot C<2>, and the nut D' is locked by a fitting hinged to the collar C'. According to the Provisional Specification, the brakes throughout a train may be made continuous by means of chains or rods.