Abstract: A cleaner for ascension pipes is mounted onto a carriage that is movable on top of a coke oven battery alongside ascension pipes of coke oven chambers in the battery. The cleaner includes a flexible member, anchored at one end to the carriage, and carrying, at the other end, a nozzle block and nozzles. The flexible member is supported by rotatable members, pivotally mounted to the carriage, with one rotatable member being power driven. Means is provided for pivoting the arm to which the powered rotatable member is mounted.The flexible member supports a flexible fluid-carrying hose that connects to the nozzle block and that carries fluid to the nozzles mounted therein. By actuating the power driven rotatable member, the nozzle block and nozzles are reciprocable in the ascension pipes and fluid carried in the hose washes encrusted material from the inner surface of the ascension pipes.

Abstract: A machine for reversing the heating cycle of a coke oven battery includes mechanism to lock out either one of two reversing rods in proper time sequence so that only three of the normal four reversing rods are operable for the selected mode of underfiring of the battery. Shifting or change over can only be accomplished at the neutral position which occurs when all fuel gas to the battery is shut off. The shifting or change over initiates the change over of rich or lean underfiring gas and also is interlocked so that the main drive cannot operate until all change over functions are completed.