Patent GB-191406494-A (GB)
Title: Improvements in and relating to Block Signalling Arrangements and the like.
Inventor: GUSTAVE YSEBOODT
IPC: B61L23/12
Filed: 1914-03-14
Abstract: 6494. Yseboodt, G., and Mautsch, R. H. March 17,1913, [Convention date]. Void [Published under Section 91 of the Act]. Drawings to Specification. Combined electrical and mechanical systems, non-automatic; electrical systems, automatic.- Three-phase or polyphase currents are used to actuate members which allow the operation of block signals. In controlling manually-operated levers, the apparatus is so arranged that the transmitting-member must be operated between the successive acceptances of two trains running in the same direction so as to reverse two of the phases in order to reverse the direction of movement of the receiving-element or, if the phases are reversed in the receiver, to cause further rotation in the same direction. A bell in the transmitting-cabin, operated by single-phase current, which is interrupted on the completion of an unblocking operation in the distant cabin, may be used to indicate such completion; or an apparatus ensuring that a transmitting signalman must complete an unblocking operation may be added to, or replace, the bell. A controlling- lever may be employed to enable the same receiver and transmitter to be utilized for different sections. A combining-device may be added for changing apparatus arranged for double-track working into a single-track system, as in case of accident, and vice versa. Means are included for cutting out an intermediate cabin when desired. Double-track and single-track systems are described, in each of which the signal lever is released for operation by rotation of a three-phase motor by current received from a hand-operated generator while a transmitter comprising two switches is operated. On completion of the movement, a switch is opened at the receiving-station, and a bell in the transmitting-cabin ceases ringing. The return movement of the transmitter moves switches which reverse the connexion of two phases of the generator to the line-wires. The signal lever can then be used to " clear the signal and again becomes locked, until released for return to normal by a second current from the generator through the reversed connexions in the transmitting-cabin. The transmitter iscombined with a releasing-apparatus in conjunction with a rail contact, which prevents actuation of the transmitter until the last axle of the train has passed the rail contact. The apparatus at a cabin cannot be unblocked so long as the signal is lowered. An intermediate, cabin may be put out of service by means of four switches actuated simultaneously by a lever, which then locks the signal levers in the clear position and the transmitters in their normal position. The four switches connect shunting-wires across the receivers and transmitter at the intermediate station. In a single-track system with intermediate signal cabins, the receivers and transmitters occupy three positions, namely, one for each direction of traffic and one neutral position. In one single-track system described, the signals are normally locked at danger, and in another, the signals at main boxes are normally locked at danger and at the intermediate boxes are normally at danger but unlocked. In an automatic electrical system for traffic in one direction along a track, the signal is held at clear until the circuit of a holding-magnet is broken when the last axle of a train passes a rail contact. During its movement to danger, a rotary commutator sends three-phase currents from three groups of batteries to a three-phase receiver at the rear signal, which closes a circuit to the signaloperating motor. When working on parallel tracks, the apparatus may be arranged to operate with two line-wires only, serving for traffic in both directions. Two insulated rails may serve as the line-conductors for the threephase current.