Patent GB-190413463-A (GB)
Title: An Electric Block Signal System.
Inventor: WERNER LOUIS CHARLES
Filed: 1904-06-14
Granted: 1905-01-26
Abstract: 13,463. Werner, L. C. June 14. Signalling between trains; semaphore signals; interlocking.-An electric block signalling-system, particularly applicable for single-track railways, having four-position signals on both sides of the track, operated by pairs of motors, one motor moving the signal a greater distance than the other motor, in the manner described in Specification No. 707, A.D. 1904, is shown in Fig. 1. When a block is occupied, four signals are automatically displayed, two of the signals being located at the opposite ends of the block aud at opposite sides, the other two signals being located one block removed from the block occupied, and at opposite sides of the track. At a block in which either a switch or drawbridge is open, extreme danger signals are displayed, and, when the block containing the switch is occupied, the switch is locked automatically in the closed position. Each track circuit C<3> includes the rails of the block, the battery c, and the relay c<31>, while each local circuit C<7>, controlled by the relay c<31> of the track circuit, includes the three relays c', c', c<3>. The armature c<5> of each relay c' constitutes a make-and-break device for the ground circuit B<4>. The ground circuits C', D<4>, E<4> , F<4> include the relays d<7>, e<7>, f<7>, g<7> having armatures d<8>, e<8>, f<8>, g<8>. The relay e' of each ground circuit is paired with a relay d' located adjacent to a semaphore D<1> at the rear end of the block preceding the local circuit containing the relay which controls the ground circuit. Short-circuiting of the track battery e cuts out the relay e<31>, opens the local circuit E<7>, and cuts out the relays e<1>, e<2>, e<3>. The armature e<5> is released and opens the ground circuit D<4> to cut out the relay e<7>. The motors 5, 6 associated with the semaphore move the semaphore a distance of two positions and one position respectively. By the use of reversed batteries, the motors and the semaphores are operated positively in both directions. The arrangement at a block in which a switch is located is different from that of the other blocks. The switch rails 7, 8 are connected by a bond wire 7<a>, and with the right-hand rail by the bond wire 7<b>. The track circuit C<3> and the ground circuit C<4> are closed normally through the switch.rail 8. Included in the ground circuit C<4> is the relay u, the armature u<1> of which is included in and controls the secondary controlling circuit B<6>. The magnet of the relay d is polarized, so that the relays d<2>, d<7> may be cut-out together without cutting-out the relay u. The switch tie-rod 10 is connected to the operating-lever 12, which has its heel 13 normally in contact with the spring 14 in the relay circuit H. The armature h<1> of the relay h constitutes a make- and-break device for the wire h<2>, constituting a common return for both the track circuit C<3> and the ground circuit C'. Automatic locking of the switch lever in its normal position is effected by including the relay magnet i in the local circuit C', the armature i<1> constituting a make-and-break device for the switch-locking circuit k.