Patent GB-191129307-A (GB)
Title: Improvements in or relating to Railway Safe Running Devices.
Inventor: ANGUS ARTHUR REGINALD
IPC: B61L3/10
Filed: 1911-02-07
Granted: 1912-05-07
Abstract: 29,307. Angus, A. R. Feb. 7, 1910, [Convention date]. Track apparatus actuating signals on trains and for stopping trains. - Relates to railwaysignalling apparatus of the type described in Specification 3096/11 in which track ramps 44, 69 complete a testing - circuit and track ramps 67, 43 respectively complete a dangersignalling circuit and a train-stopping circuit. The testing-circuit, including a source of electricity carried on the train, passes from the ramp 69 to an electro-magnet 49, and thence through controlling-contacts such as contacts on signal lever, signal switch points, &c. If the track is clear, this circuit is closed and the electro-magnet 49 attracts its armature 60 from a contact 61. If the track is not clear, the contacts 60, 61 are not separated, and conse. quently a danger circuit including the track ramp 67 and contacts 60, 61 on the track and signalling-appliances and a source of electrical energy on the engine is closed. In particular, the invention relates to the arrangement for a single-track working, and is described in connexion with apparatus adapted for a track with several alternative routes. In such an arrangement, separate signalling-devices 126, 124, 125 in separate circuits may be provided for the various routes, and alarm and train-stopping devices 135, 136, 137 are provided in another circuit. These circuits are brought to traincircuit terminals 103, 104, 105, 106 respectively, associated with the engine contact, and one or other of them is connected by a sliding contact rod 97 of the engine contact to the track ramp according to the height to which the rod 97 is lifted by the track ramp. When the rod 97 is over the ramp 67, the circuit including the relay 126 is connected to it. When it is over the ramp 43, which is highest of all, the circuit containing the magnets for operating the whistle, brake valve, and throttle lever is energized and the engine is stopped. When the rod is over either of the alternative route ramps, the corresponding lamp signal 124 or 125 is put in circuit. The return portions of these circuits may be by earth or, as shown, by additional track ramps 46 and engine contacts 115. Three or more rods 97 are provided on the engine, the associated train-circuit terminals 103 ... 106 being connected in parallel as shown. All receive in turn the same signal. The track ramps of the testing-circuits and the return ramps are duplicated at 069, 071, 044, 046, for working in the reverse direction. Additional engine contacts are also provided. The invention consists in the provision of a compound electric switch operatively connected to the usual reversing- gear of the engine by means of which the several train circuits may be properly re-arranged when the direction of travel of the train is reversed. Train-circuit terminals for forward running are connected to switch contacts 92 ... 95, and those for reverse running to contacts 88 ... 91. One of these sets is connected to central contacts 83 ... 86 by a switch plate which is connected to the reversing-gear of the engine. Associated with this switch are three alternative sources of electrical energy for the testing-circuits. A dynamo 119 normally is in use, and its circuit includes electro-magnets 141, which, by attracting an armature 165, maintain open the circuits of an accumulator 120 and of a cell 121. If the dynamo fails, the contacts 166, 167 are bridged and the accumulator circuit is closed, the cell circuit being held open at 174 by magnets 173. When the accumulator fails, the cell is put in circuit.