Patent GB-423159-A (GB)
Title: Improvements in or relating to electric apparatus for illuminating trains
IPC: B60R16/02
Filed: 1934-08-18
Abstract: 423,159. Self-contained supply systems. NAAMLOOZE VENNOOTSCHAP MACHINERIEEN-EN APPARATEN FABRIEKEN, 30, Croeselaan, Utrecht, Holland. Aug. 18, 1934, No. 23858. Convention date, Aug. 18, 1933. [Class 38 (iv)] Relates to a train lighting system employing a turbodriven generator, a battery, and three mains running through the train, a lighting lead, a charging lead for the battery and a common return, an automatic relay energized from the charging main being provided in the guard's van which connects the battery to the charging main when the lighting or charging leads are energized from the generator and connects the battery to the lighting lead when the generator is not working, and consists in the provision of means which, when the generator is energized and connected to the lighting lead, connects the charging main to the lighting lead through a resistance andwhen the generator is de-energized disconnect the charging lead from the lighting lead so that the automatic switch in the guard's van does not operate. The locomotive is provided with a generator 4 and manual and automatic switches 10, 9 respectively. When the manual switch is to the left and the automatic switch 9 attracted due to generator operating, the generator is connected to the charging lead 15. In this position of the manual switch 10 the resistance 8 in the shunt field circuit of the generator is disconnected and the compound field 6 also disconnected so that the generator produces a high voltage for battery charging. This will take place irrespective of the position of the switch 21 in the guard's van, for the automatic switch 18 energized from the charging lead will operate to connect the battery direct to the charging lead. When the switch 10 is to the right, the generator 4 is connected to the lighting lead 14 through the compounding winding 6. In addition, the resistance 8 is in the field circuit so that the generator voltage is reduced and regulated for lighting. When the switch 9 is attracted the charging lead is connected to the lighting lead through a resistance 17 and contacts 19, so that the automatic switch 18 will be energized to connect the battery to the lighting lead through the charging lead 15 and resistance 17. Failure of the generator will break this circuit and effect de-energization of the automatic switch 18. The manual switch 21 enables the lighting lead to be energized from the battery when the generator is not working. A polarized relay 29 enables the guard's van lights to be switched on irrespective of the conditions that exist. If charging is taking place the connection is through contacts 35 and resistances 33. If the lighting lead is energized the guard's van lights can only be put on if the switch 21 is in the right hand position. This is to ensure that if failure of the generator occurred, the switch 21 would be in a position to ensure energization of the lighting lead from the battery 20 when the switch 18 opened. When the generator is not running the connection to the battery for the guard's van lights is through a resistance 37.