Abstract: There is disclosed a reversing valve for use with a regenerative coke oven, in which the valve cock is lubricated, having four spaced longitudinally extending lubrication grooves that communicate with lubrication means when the valve is in one of its desired end positions, either open or closed. In a preferred embodiment, means are also provided for introducing degraphitizing air into the grooves, in certain positions of the valve cock.

Abstract: A nozzle plate construction for underjet coke ovens for distributing and metering combustion-supporting air supplied upwardly to regenerators through a sole flue extending parallel to the chamber axis. The sole flue is closed at the top by plate elements having apertures therein. In accordance with the invention, the various plate elements are in the form of troughs having plane base plates each formed with one longitudinal gap therein. Associated with each longitudinal gap is a metering element so mounted at its ends so as to be adjustable in its distance from the plane of the base plate. In this manner, the air flowing upwardly into the regenerator sections can be accurately controlled and uniformly distributed. At the same time, the nozzle plate construction of the invention is light in weight while being very stable and easy to assemble.

Abstract: A coke oven adapted to be regeneratively heated by lean gas or rich gas at choice, characterized in that control flaps are disposed in air inlet chests for the coke oven regenerator and are connected through linkages to a common actuating rod extending along the coke oven battery. Reciprocation of the actuating rod in one direction or the other will open or close all flaps essentially simultaneously to rapidly change the quantity of combustion-supporting air supplied to the regenerator, depending upon whether lean or rich gas is being used.