Patent GB-911974-A (GB)
Title: Improvements in apparatus for the levelling of permanent way
IPC: E01B35/00
Filed: 1959-01-08
Abstract: 911,974. Levelling instruments. MAUZIN, A. E. Jan. 8, 1959 [Jan. 10, 1958], No. 761/59. Class 97 (2). [Also in Group XXX] In a method or apparatus for levelling railway rails a rigid rectilinear member is arranged vertically above each rail a predetermined distance above the desired rail position and each sleeper is raised in turn to position the rails a predetermined distance below the rectilinear member. The apparatus shown in Fig. 1 comprises a packing machine A, provided with packing tools 9, supports B which are spaced at chosen points along the unlevelled track, two sets of hinged triangular frameworks C, arranged one set above each rail, and carriages D and E coupled to the packing machine A for supporting the frameworks C. The apparatus is operated in the following manner. Assume the rails 7, 8 are laid, the supports B placed at chosen positions along the track and a portion of the rails to the right of the sleeper levelled then the portion of the rails to the left of the sleeper 12 is to be levelled. The machine A is brought to a position so that its tools 9 are disposed on each side of the sleeper 12. A further support B, other than that shown in Fig. 1, is now placed at a chosen point in front of the support B and a hinged deformable framework and 21, 25, 26 (Fig. 4) is displaced until a bubble level 30 is horizontal and the framework is then locked in the adjusted position; rollers 33, which support one of the frameworks C at 80, Fig. 1, are then horizontal. A telescope 38, the line of sight of which is arranged to be a specified distance below the roller 33 and above the rail 7 or 8, is now sighted on to the scale 34 of the support B, shown in Fig. 1, and is vertically adjusted and locked in the desired position. A yet further support B is now placed at an auxiliary point a short distance in front of the support B, shown in Fig. 1, for subsequent working operation of the packing machine A and a similar procedure is followed with regard to this support as in the case of the previously mentioned further support B to bring the rods 21 and 27 to the vertical. The telescope 38 on the forwardly positioned further support B is now sighted on the scale 34 of the yet further support B and the amount necessary to raise the roller 33 to the desired height is noted. A vertically adjustable graduated scale 29 is now moved until the amount of adjustment required to the roller 33 below the zero scale is opposite the pointer 31 and the scale 29 is then fixed in position. The pointer 31 is now raised by hand wheel 24 until it is opposite the zero mark on the scale 29 and the roller 33 is at the required height and the zero of the scale 34 coincides with the line of sight of the telescope 38 so that when the machine A is moved forward the tube b of one of the frame C passes over and rests on the roller 33. To position the hinge point 3 of the frame C in the plane passing through the points 5 and 80. The point 3 is raised or lowered by a jack 51, Fig. 10, depending on whether a contact 2a, Fig. 9, formed on a vertical member e of one of the frames C is in contact with a contact la or 1b provided on the vertical member a of the other frame C. The vertical members e, a are also moved into a vertical plane containing the points 5, 80 by a jack 60, Fig. 10, through a movable carriage 58 connected to the members e, a through a Y- shaped bar 59 connected to the members e, a at a2, e2, Fig. 9. The direction in which the members a, e are moved depends on which of the terminals 62, 63 are engaged by a weight 61a of a pendulum suspended from the carriage 58. The tools 9 are now lowered to pack ballast beneath the sleeper which is raised until a spring-loaded roller 10 reaches a predetermined point at which a contact 10c Fig. 3, abuts against an arm d<SP>1</SP> of the tube d when an electric circuit is operated and arrests the operation of the tools 9 and the rail is in the required position.