Patent GB-190713064-A (GB)
Title: Improvements in or relating to Coupling Apparatus for Railway Vehicles.
Inventor: BROCKELBANK THOMAS ATTWOOD
Filed: 1907-06-05
Granted: 1908-02-13
Abstract: 13,064. Brockelbank, T. A. June 5. Draw-gear.-Couplings of the type described in Specifications No. 13,218, A.D. 1902, and No. 29,422, A.D. 1906, are provided with tightening-gear, the supporting and operating mechanism of the couplings being modified to allow of the necessary longitudinal movement. The tightening-gear comprises a nut c, Fig. 1, mounted upon right and left handed screw ends of two portions a, b of the draw-bar, which can slide longitudinally but not rotate. The nut c may be rotated by worm or helical gearing, bevel-gearing, or chains adapted to be worked from the side of the vehicle by a hand-wheel, lever, or equivalent means. In the form shown, bevel-wheels d, d<1> are used, the wheel d being held against longitudinal motion by a plate f fixed to the vehicle. In order to allow for the longitudinal movement of the draw-bar as a whole, the nut c is arranged to slide in the wheel d. Couplings, automatic.-The carrier of the couplings referred to above is formed with the usual side portions h<1> and also with an horizontal part h, h<4> and a vertical flange h<2>. The part h is arranged to move longitudinally upon rollers i mounted in an angle-bracket k, k<1> fixed to the headstock, while the flange h<2> is fixed to the draw-hook q. In order that the flange h<2> may be readily passed over the part a of the draw-bar and secured to the hook, it is formed with a hole o, Fig. 6, having side recesses o', o<2> which may be passed over projections p, p' on the draw-hook, the arrangement being such that, when the flange h<2> has passed the projections, the carrier may be lowered so that the recesses and projections do not coincide. The flange abuts at the front against two other projections q<1> formed on the draw-hook. The usual support r, r<3>' r<4>, pivoted at s, is preferably mounted inside the carrier and has a rearward extension r<2>, which is connected with the operating-mechanism in such a way as to allow for the tightening operation. In the form shown, an operating cross-shaft 1<a> is formed with an arm 1 connected by a slack chain 2 to the arm r<2>. In order to move the coupling-hook t from the coupling position, shown in Fig. 1, to the inoperative or uncoupled position shown in Fig. 3, the arm 1 is quickly raised, whereupon the projection 4 of the support r displaces the tail t<2> of the hook t from a recess 5<a> in the carrier. The reverse movement of the hook t is effected by a positive engagement between the arms 1, r<2>. In order to assist in retaining the hook t in the inoperative position, the side pieces h<1> of the carrier may be extended forward at h<6> so as to project beyond the edges v of the support r when this is in the position shown in Fig. 3. The link u which supports the hook t may be connected to a hole in the draw-hook q as heretofore, but is preferably attached to the slot q<2> of the draw-hook. According to the Provisional Specification, the support r may be operated by a rod connected at its upper end to a longitudinal slot formed in the arm r<2>, and at its lower end to the inner ends of two transverse operating-levers.