Patent GB-903746-A (GB)
Title: Improvements relating to railway vehicle classification yards
IPC: B61K7/12
Filed: 1959-04-14
Abstract: 903,746. Classification yard retarder control systems. WESTINGHOUSE AIR BRAKE CO. April 14, 1959. [April 14, 1958], No. 12629/59. Class 105. In or for a free-rolling railway classification yard, an information storage system has a series of information storage devices in which successive items of information from a single source are stored successively each in the first device in the series void of stored information and from which information may be extracted other than in the order in which it has been stored. Means are provided to generate a code combination identifying each of the storage devices. Also, as part of the apparatus at or for each of a plurality of locations where the information is used, there is an arrangement which, in response to a particular code combination transferred thereto, permits stored information to be transferred to the location only from that device identified by the particular combination. Assuming that all the apparatus is in its normal condition as shown in the drawings and that a cut is passing through the yards, control takes place in the following manner. As the cut descends the hump and occupies approach track section AT (Fig. 2) relay ATR is released and repeater relay ATP is picked up. At this same time, the speed of the cut is measured by radar velocity meter 9 in response to reflected energy received by antenna 199. The output signals appearing at terminal b of bias unit 11, which is representative of the tangent track rolling resistance measurements to be stored and transferred, is now stored in Unit 1ES, Fig. 10. With relay ATP picked up, relay RI is picked up and held up over back contact c of relay R1TP. Relay 1A, Fig. 9, is then picked up. At the time that relay 1A is picked up, a tangent acceleration code (TAC) is generated by energization of leads 231,232 and 233, Fig. 9. Over front contact of relay 1A, lead 233 is energized, leaving leads 231 and 232 de-energized, thus generating the code 001 to designate that the information is stored in the first panel. This information is stored in bank 54 of the master retarders storage location in relays 1CTAC, 2CTAC and 3CTAC (Fig. 3). With lead 233 energized, relay 3CTAC is picked up and is then held up over front contact d of relay ATP, and its own front contact a. Following the approach track section AT is a multiple section master retarder comprising two track sections MR1T, Fig. 2, and MR2T, Fig. 3. When the cut enters section MR1T, relay R1TR is released and relay R1TP is picked up. The stick circuit for relay R1 is then interrupted at the open back point of contact c of relay R1TP and relay R1 is released. Relay 1B, Fig. 9, is then picked up by relay ATP, contact c and is held up over the back contact d of relay 1RO and its own front contact a. With relay 1B up, relay 1H, Fig. 10, is picked up by relay 1B (contact d), line 334 to terminal b, Fig. 10, of storage unit 1ES. The stick circuit for relay 1A is then interrupted at the open back contacts c of relay 1B and of relay 1H. Relay 1A is accordingly released. When track Section AT. is vacated relay ATR is again picked up and relay ATP is released. Relay ATCP is picked up over back contact b of relay ATP. This portion of the apparatus is then in condition to. accept a subsequent measurement. When Section MR1T is vacated, picking up relay R1TR and causing relay R1TP to release, the tangent acceleration code stored in relays 1CTAC to 3CTAC is transferred to the B group of relays 1BTAC to 3BTAC (Fig. 3). Specifications 853,908, and 903,741 are referred to.