Patent GB-720469-A (GB)
Title: Improvements in signalling devices for coke-oven batteries
IPC: C10B41/04
Filed: 1951-04-12
Abstract: 720,469. Discharging coke ovens. KOPPERS GES., H. April 12, 1951, [April 22, 1950; May 12, 1950.] No. 8576/51. Class 51 (2). [Also in Group XXXVIII] In a system for ensuring alignment of coke-guide and pusher machines, one machine carries a device which sends an impulse inductively or by means of a switch, which may be operated by clockwork, for each oven passed, to a step-bystep receiver on the other. In the system shown in Fig. 1, apparatus 17 on the guide machine sends impulses to an indicator 22 on the pusher and the indicator at each step sends back checking impulses to operate an indicator 26 on the guide machine. A further indicator 31 on the guide machine is operated by impulses in accordance with the movements of the pusher machine. The motor driving the pusher machine may be made to receive current only when the machines are out of alignment. In a modified system, Fig. 2, which is described in greater detail, only a single transmission line is employed. The indicator 31 is omitted, but further indicators are provided on each machine to show the position of that machine. Signalling position of guide machine; transmission of checking impulses. As the guide machine (left hand half of Fig. 2) passes each oven, an impulse is sent from the top or bottom half of a centre-tapped transformer 45, according to the direction of travel, to the transmission line 32 and to local magnets 50, 51 which are connected in series across a further centre-tapped transformer 55. One or other of these magnets, according to the impulse helps or opposes the normal energization, then operates, removes a holding pawl 59 or 60 from a ratchet wheel 61 and energizes a stepping magnet 63 common to both pawls 59 and 60. The impulses sent to the pusher machine similarly control a ratchet mechanism. The operation of the stepping magnet 82 of this mechanism however, also connects transformer 84 via one or other of rectifiers 85, 102 to line to operate, via the corresponding one of rectifiers 89, 101, a similar stepby-step mechanism 95 on the guide machine. Apparatus 61, 95 and 78 are thus stepped substantially together and should all show the same indication. Registering position of pusher machine; "Ready", "Stop" and alarm signals; control of ram. As each oven is passed by the pusher machine, an impulse is sent to a ratchet mechanism 114 similar to those previously described. The "Ready" signal is given by operating a push 90 at the guide machine to complete a circuit via rectifiers 101, 102 for lamp and acoustic devices 106, 105 and relay 107. The latter, provided that the machines are in corresponding positions, and switch 116, accordingly, is closed, energizes relay 119, which completes a path in the circuit of the ram motor circuit-breaker 121. "Stop" key 91 sends a signal via rectifiers 89, 85 to lamp, &c., devices 126, 125, and relay 124, which breaks the circuit of circuit-breaker 121. If at any time the indicators 61, 95 (and hence 78) are out of alignment the circuit of relay 98 is broken by switch 96 and an audible alarm is given. Protecting pusher operator from radiation. Provided that the two machines are in corresponding positions, the operator can project the ram as far as the oven door, to shield himself from the radiation, independent of relay 119, but at this point the switch 127 automatically disconnects the circuit breaker 121 unless 119 has been operated in the meantime.