Patent GB-817575-A (GB)
Title: Electrically operated control means for coke oven machinery
IPC: C10B41/04
Filed: 1955-10-11
Abstract: 817,575. Discharging coke oven batteries. UNION CHIMIQUE BELGE S.A. Oct. 11, 1955 [Oct. 16, 1954], No. 28958/55. Class 51 (2). [Also in Group XXXVII] In the discharge of a coke oven battery, operation of the ram on the coke pusher machine is prevented until the coke pusher machine, the coke guide machine, and the coke car are positioned in front of the same chamber, the correct doors are removed, and the flopper plate is correctly positioned. The control means is of the type in which the coke pusher machine and the coke guide machine are each provided with means for sending electric impulses which actuate double-acting electric escapement mechanism giving a stepby-step movement to alignment members, characterized in that the alignment members comprise linear guide bars 6M and 6C for the pusher machine and guide machine respectively each having a double set of oppositely disposed ratchet teeth and having contacts 9M and 9C which only engage when the pusher and guide machines are opposite the same oven chamber. Movement of guide bar 6M may be initiated when a trip switch 11M carried by the pusher machine, moving from left to right between one oven chamber and the next, contacts a stop 12M, closing the switch and energizing solenoid 14M via connecting bus-bar 2 and positive bus-bar 1. This lifts rocking roller 15M closing contact 13M and starting motor 17M to drive the guide bar through worm gearing 8M. As motor 17M starts, solenoid 14M releases the roller 15M which engages the profiled face of the next guide bar ratchet tooth, finally falling into its lowermost position to open contact 13M and to stop the motor. Rocking roller 25M rides over its ratchet teeth without operating contact 23M. If the pusher machine moves from right to left, trip switch 21M is actuated by stop 22M at a different level from stop 12M, driving the guide bar 6M by motor 27M in the opposite direction to that previously described, rocking roller 25M being moved to its full extent by solenoid 24M to close contact 23M. Similar movements of the guide machine over one or more oven chambers move guide bar 6C through a corresponding number of ratchet teeth. Contact 9M is connected to the negative bus-bar 3 by the pusher machine trolley H through a relay G which closes the circuit of the ram motor enabling it to start up. The circuit is completed through contact 9C, link-up conductor E, F, switch D closed when the flapper plate is positioned, switch C closed when the coke side door is raised, contacts B1 and B2 engaged when the coke car and coke guide machines are correctly positioned, and coke car trolley A connected to the positive bus-bar 1. Switch I is provided to throw the relay G out of position as soon as the ram K starts to withdraw from an oven chamber. In the event of a power failure, a bank of accumulators S is brought into operation with or without a transformer R according to the type of current desired. The trip switch 11 or 21 is designed so that if either machine stops between oven chambers it does not remain in contact with stop 12 or 22 (see Group XXXVII).