Patent GB-458209-A (GB)
Title: Improvements in systems of recording and repeating signals of the track on locomotives and automotive rail vehicles
IPC: B61L3/12
Filed: 1935-11-19
Abstract: 458,209. Actuating and recording signals on trains. ATELIERS VAUCANSON, 11, Rue du Surmelin, Paris. Nov. 19, 1935, No. 32030. Convention date, Nov. 19, 1934. [Class 105] Wayside signal aspects are repeated and recorded on the locomotive by means of an iron-cored electromagnet on the track and an iron-cored receiving magnetic circuit on the locomotive in an air gap of which is located a continuously rotating wound armature generating a current of a polarity determined by the signal aspect through the direction of energization of the track electromagnet. For three-aspect signals a permanent magnet 48 and an electromagnet 47 are arranged as shown in Fig. 8 and co-operate with two ironcored magnetic receiving circuits 50, 49 each having a wound armature 56, 51 continuously rotated by a common electric motor 61. According to the polarity of the track electromagnet 47 the current generated by the armature 51 effects the release of one or other of the polarized magnets 54, 55 so repeating and recording a clear or a caution aspect. The release of one of the polarized magnets 54 or 55 causes a spindle 62 to be rocked to open a contact 63-64 in the circuit of the armature 56 and therefore the track permanent magnet is ineffective to give a signal. But if the signal is at danger or a polarized magnet 54 or 55 fails to release then the current generated by the armature 56 passes over the normally closed contact 63-64 to cause the release of a polarized magnet 60 whereby contacts are then closed to operate a warning signal 67 and a recording stylus 70. A push 72 permits re-setting. When the locomotive travels tender first it is necessary to reverse the connections to the magnets 54, 55 or the direction of rotation of the armature 51. This is effected automatically by the device shown in Fig. 4. An axle-driven shaft carries a cam 18 to operate a spring arm 21 of a reversing switch 23. When the train is moving at speed the cam 18 is swung out of the way by the centrifugal mass 20. For single-line traffic in both directions only the magnets for the relevant direction of traffic should be energized and this is effected by the switch device shown in Fig. 6. An approaching train engages the spring arm 36 to rock a cam 33 on its axle 34 whereby a contact 30 is closed and held closed by a dash-pot 38 for sufficient time for the train to have passed over the associated track magnet. A train travelling in the opposite direction would not close the contact because of the asymmetry of the cam 33. The rotation of the armatures 51, 56 is supervised by a centrifugal contact on the driving shaft or by a winding on the armature of the driving motor effecting the energization of a lamp or a relay. Fig. 9 shows an arrangement in which any failure of the locomotive apparatus is recorded independently of the recording of the three signal aspects. Two electromagnets and one permanent magnet are provided on the track which respectively activate the generators 73, 74. The first track electromagnet therefore effects the release of one or other polarized magnet 77 or 78 and operates a change-over switch 80 so that the second track electromagnet releases one or other polarized magnet 77 or 79 and restores the switch 80. These polarized relays effect the recording of the signal aspects. The track permanent magnet causes a relay 87 to be energized so opening its contact 89-90 in one line to a relay 92 but the relay 92 remains energized as a second line to this relay 92 has been completed by the closure of some of the contacts 81-82, 83-84, 85-86, when the signal aspect was properly recorded. If however, the recording apparatus failed then the relay 92 would drop and, being a stick relay energized over its own contact 93, would remain dropped so lighting a red warning lamp R and operating a stylus 96. Failure of the drive for the generators 73, 74 would also cause the relay 92 to drop by a contact 101-109 opening when the auxiliary winding on the motor armature 75 ceased to energize a relay 99. The motor 75 is reversed by the switch 76 when the locomotive travels tender first.