Patent GB-190618259-A (GB)
Title: Improvements in Methods and Apparatus for Recording, Indicating, and Facilitating the Control of Railway Sidings and the like.
Inventor: SCHTCHEGLOVITOFF BENJAMIN
Filed: 1906-08-14
Granted: 1907-08-14
Abstract: 18,259. Schtcheglovitoff. B. Aug. 14. Indicating and recording movements of trains; interlocking - apparatus. - An instrument for mechanically recording the number of railway vehicles arriving at and departing from a goods yard, with the times and direction of arrival and departure, comprises a hand-operated apparatus with a paper chart wound round a drum rotated by clockwork, and on which a separate stylus or pen for each road continually marks, each pen being traversed in a direction parallel to the axis of the drum by a screw and nut, the amount of traverse being proportional to the number of cars in motion at each operation. A series of pegs in the instrument is provided with interlocking apparatus to allow the operation of only one peg at a time. The chart 1, Fig. 1, is divided, for example, into strips 2 ... 5 corresponding to three different roads, and the yard, and the four pens 6, Fig. 4, are carried by nuts 11 upon separate vertical screw-threaded shafts 9. Each shaft is adapted to be rotated by gear-wheels 10, 13, ... 20 when a handle 7, Fig. 1, is manually rotated, and the idle wheel 21 corresponding to a particular pen 6 is manually pushed into gear with the wheels 10, 13. The amount and direction of rotation are made to correspond, respectively, with the number and direction of motion of the cars, so that the pen traces a vertical line on the chart of a length corresponding to the number of cars. To restrict the motion of the handle 7, Fig. 1, to correspond with the number of cars in motion, a pointer 25 is moved over a fixed dial provided with a series of holes, through any one of which a pin 24 on the pointer may pass to engage with a hole 27, Fig. 4, in a disk 23 geared with the handle 7. Before each recording operation, the pointer 25 is moved in one direction or the other, corresponding with arriving and departing cars, from zero to a position indicating the number of cars. A spring presses the pin 24 into the hole 27 when the handle 7 has completed the requisite movement, and stops the apparatus. Ratchet teeth formed on the face of the disk 23 are inclined in opposite directions from zero, and engage with the pin 24 on the pointer 25 to prevent movement in the wrong direction. The idle wheels 21, Fig. 3, are carried by plugs 8, Fig. 5, each provided with four recesses, for a series of four plugs, one of which is bevelled. Four vertical notched rods 33 engage the plugs in such a manner that, when any plug is pushed inwards to engage the gear-wheels, a bar 33 rides down the bevelled recess in that plug under the action of a spring 35, and engages ordinary recesses in each of the other plugs to prevent their motion, so constituting interlocking apparatus for the plugs. A spring catch for each plug is released from the pointer 25, Fig. 3, when the pin 24 moves into the hole in the disk 23 to stop the movement. Numbering-wheels 36, 37, Fig. 7, are actuated by a projection from each nut 11 engaging the radial arms 39 or the radial arms 40 at the limits of its motion, to record separate hundreds of vehicles in addition to those indicated by the chart lines. The connecting-pinion 38 rings a bell at each operation. The chart may be wound from one roller on to another, and the roller may be arranged horizontally instead of vertically.