Patent GB-190602060-A (GB)
Title: Improvements in Apparatus for Operating the Points and Signals of Railways.
Inventor: MONARD ALFRED
Filed: 1906-01-26
Granted: 1906-12-20
Abstract: 2060. Monard, A. Jan. 27, 1905, [date applied for under Patents Act, 1901]. Valves and valve-gear.-Apparatus for use in the pneumatic system of operating railway points and signals described in Specification No. 14.759, A.D. 1903, [Abridgment Class Railway signals &c.], and employing the cocks described in Specification No. 1655, A.D. 1906, [Abridgment Class Railway signals &c.], comprises improvements in the " distributors," " totalizers," " collectors," and motors for operating and locking the points. Fig. 1 shows the system in general. Fig. 3 shows a section of the distributors b, which receive pressure from the operating table valves a along the conduits 2, which pressure lifts the check valves 1 and passes along separate conduits 3 to the motors d of the points. Each distributor consists of a set of such chambers arranged side by side as required. They are connected up so as to operate all points required for a given transit, although in some cases other points may also be operated which do not interfere with the road required. The points-operating motors, Figs. 7 and 9, receive pressure along. one of the conduits 19, 20, according to the required position of the points. Each conduit communicates with two valves 31, 32, or 36, 37. Pressure in the pipe 19 lifts the valves 31, 32, which resemble that shown in Fig. 4, by acting on the large piston 10. The valve 31 thus opens the main conduit 23 to the cylinder 24, and the valve 32 opens to allow passage of the control fluid from the locking-motor 28, Fig. 11. The piston 40 when at the end of its stroke opens the port 33 and allows fluid to pass to the locking-motor, Fig. 11, the cylinder 28 of which is of two diameters, the smaller end being always acted upon by the pressure in the main conduit 23. Pressure on the large end moves the piston to lock the points by the bolt 29. The piston then uncovers the port 35 and passes control fluid through the conduit and through the valve 32 and the conduits 21 to the totalizers g, which are made up of sets of conical chambers 4, Fig. 4, closed at the top by an air-tight cap holding in place a plug 5 with a central hole through which the spindle carrying two valves 8, 10 passes and which is connected with the annular channel 14. The plug 5 is also provided with an annular channel 12 to give communication between the lower part of the chamber 4 and the ports 13. Pressure in the. conduit 9 from the motors of the points lifts the valves 8, 10, closing the ports 11 and opening the conduit 7 from the main conduit to the channel' 14 and so to the next chamber through the port 15. When the control fluid from all points concerned has lifted all valves, communication is established to the collectors h, which are made up of a series of check valves to prevent back flow to other totalizers. When the conduit 9 is opened to exhaust, the valve 10 falls and puts the port 15 to exhaust, thus cutting off the conduit 7 from the conduit to the collectors h. A control valve from the central cabin may be added in series with the totalizers. From the collector h the pressure fluid passes to the cock of the table and to the signal as described in the prior Specification.