Russell movable-wall oven

Russell movable-wall oven

[′rəs·əl ¦müv·ə·bəl ¦wȯl ‚əv·ən]
(chemical engineering)
An oven for coal carbonization which cokes a 400-pound (180-kilogram) charge in a horizontal, 12-inch-wide (30-centimeter) chamber, heated from both sides, but with one side floating and balanced against scales.