Patent GB-767941-A (GB)
Title: Railway route-setting apparatus
IPC: B61L19/06
Filed: 1952-12-19
Abstract: 767,941. Railway route-setting apparatus. STANDARD TELEPHONES & CABLES, Ltd. Dec. 19, 1952 [Dec. 24, 1951], No. 32285/52. Class 105. Co-ordination apparatus for two signal cabins for setting up a route through a railway junction network when the route being built up comprises a path in a portion of the network controlled by one cabin and a path in another portion of the network controlled by the other cabin includes common co-ordinating leads between the two cabins for coordinating the establishment of each and every one of a number of routes through the network. To establish a path a1 controlled by cabin A which-includes the apparatus shown in Fig. 1 and that above the broken horizontal line in Fig. 2 in combination with a path 1 controlled by cabin B, which includes the apparatus shown in Fig. 3 and that below the broken horizontal line in Fig. 2, the attendant in A selects the path a1 in any convenient way and thereby engages the co-ordinating lead L with which the desired route or path combination is identified. A flashing signal is given at A on lamp L11, Fig. 1, and at B a flashing lamp L12, Fig. 3, indicates the route desired whereupon the attendant at B operates a master combination key and a secondary combination key appropriate to lamp L12 to set up the desired path controlled by B in known manner and when the path is set the lamp L12 at B is caused to give a steady light indicating that the path combination has been established and the lamp L11 at A is caused to give a steady light indicating to the attendant that the desired co-ordination has been achieved. When the route identifying lead L1, for example, has been engaged, relays associated with others of the leads are disconnected so that those leads may be used in the co-ordinating process in setting up the desired route. Assuming A initiates the route setting, resulting in the closing of contacts fst a, fst11, fst12, Fig. 1,and depresses a combination key closing contacts ZGT1, ZGT2 to energize the operating windings ZA11 and T11 of relays ZA1 and T1 respectively. Relay Tl is held over its winding T12 and at fc t13 (front contact t13) and at bc t16, t17 (back contacts t16, t17), Fig. 2, prevents energizing of windings ZL21, ZL22 of relay ZL2 to enable the leads L3, L4 between the cabins A, B to be used without affecting the relay ZL2 and prevents opening of contacts Zl23, Zl24 associated with leads L1, L3. At fc Zal5 relay ZP at A is picked up in series, over lead L1, with relay ZH by its winding ZH11 at B. At fc Zh14, Fig. 3, an intermittent source is connected to lamp L12 indicating that A is seeking to establish, e.g., combination 1 route. At fc Zp2, Fig. 1, the holding windings ZA12 of relay ZA1 is energized over energizing winding slow-to-release relay ZR, fc ZGT2, Zp2, t14 and Za13. At fc Zr2 relay ZR is held and permits release of the combination key to open contacts ZGT1 and ZGT2. At fc Za14 an intermittent source is connected to lamp L11 to give a flashing signal. At fc fst a and fc fst12, Fig. 1, the latch-type relay FS is operated to set up the desired path in known manner and when this path has been established a relay FF1 (not shown) is operated. On seeing the flashing lamp L12, attendant B operates a master combination key to close fc ZGT, Fig. 3, and a secondary combination key appropriate to the flashing lamp to close fc Zst1 and energize the winding Zs11 of latch relay Zs1 (whose release winding is shown in Fig. 2). At bc Zs13 any other ZS relay is prevented from operating. Relay Zs1 sets up the desired path controlled by B in known manner, whereupon a relay ZU (not shown) is operated and at fc Zu11 energizes the pick-up winding ZF11 (Fig. 3) of latch relay ZF1 over bc Zf13, fc Zs14, Zh15, opening the circuit at bc Zf13. The operation of change-over contact Zf16 causes the lamp L12 to glow steadily, indicating that the desired path has been established. Relay ZE1 is now operated over fc Zu13, bc Zh17, fc Zf18, bc Zh38, bc Zf37, lead L2, fc Zal6. At change-over contact Ze12, Fig. 1, a continuous supply to lamp L11 is substituted for the intermittent supply, the steady light indicating in A that the required co-ordination with B has been achieved. At change-over contact Zel4, Fig. 2, relay ZG is connected to lead L4 and relay winding ZL22 is disconnected from that lead and relay ZG is picked up over fc ff14, Ze14, bc Za36, lead L4, fc Zf17, fc Zh19; and fc Zu12. At fc Zg2 the operating winding ZW01 of latch relay ZW is energized over fc Zr3 and at fc Zg3 at fc Zw6 signal controlling relay FU1 is operated over fc fs11 and fc Ze15 and this circuit may also contain proving contacts, e.g. of track switches for the path set up from A. On the passage of a train the relay FF (not shown) is released and the release winding (not shown) of relay FS1 is energized to release that relay, and at fc fs11 relay FU1 is released. At fc ff14 relay ZG is released and at bc Zgl relay ZR, Fig. 1, is shortcircuited and releases to break, at fc Zr2, the holding circuit of relay ZA1, which relay also releases. At fc Za15 and fc Za16 relays ZP and ZE1 are released and complete the energizing circuit for the release windings Zw02 of relay ZW over bc Ze11, Ze21, Ze31, Ze41, fc Zw3, bc Zg4, Zrl and Zpl. At fc Za15 the operating winding ZH11 of relay ZH1 at B, Fig. 2, is deenergized. The path controlled by B is also released in known manner on the passage of a train resulting in the closing of a contact fa11 and changing over of a contact fa12 at B, Fig. 2. Relay ZH1 is re-operated and relay ZL1 is operated over fc fa11, fc Zf19, winding ZH11, bc Zf48, Zh28, Zf27, Za46, Ze24, Z123, Ze33, Za15, ff12, operating winding ZL11 of relay ZL1, and bc t26. At bc Zl16, Fig. 1, the circuit for the holding windings T12 of relay T1 is opened and at bc Zl15 the operating circuit for that relay is opened so that the relay releases. At fc Zl13, Fig. 2, the release windings Zs12 of relay Zs1 is energized over bc ff13, fc Zl13, bc Ze34, Za16, lead L2, bc Zf37, Zh38, fc Zf18, fa12, and relay Zsl releases. At fc Zl14, release winding ZF12 of relay ZF1 is energized over be ff33, fc Z114, bc Ze14, Za36, lead L4, fc Zf17, fc Zh19, bc Zs15 and relay ZF1 releases. At fc Zf19 relays ZH1 and ZL1 are released. A cancel key ZRT, Fig. 2, at A on operation closes contact ZRT1, Fig. 1, and if the route has not been established, relays ZG and ZW will not have operated, and if the path 1 has not been established, relay ZR is short-circuited by closing of contact ZRT1, and the relay releases followed by relays LA1 and ZH1 in cabin B and at Zh14, Fig. 3, the lamp L12 is extinguished. If the path 1 has been established, relay ZE1 will be operated and at key contact ZRT2 relay ZH3 is energized over bc Zw7, fc Ze13 and the operating winding ZH31 of the relay which is held over its holding winding ZH32, Fig. 3, energized over fc Zf15 and fc Zh33. Relays ZA1, ZE1 are then released at contacts Zr2 and Zal6 respectively. The windings ZH11 and ZL11 are then energized and release of the apparatus follows.