Variable Condenser

—A condenser placed in a box and divided into sections, and provided with switches for cutting the © different sections in or out and so varying the capacity; an adjustable condenser. Variable Expansion. A steam engine is said to have variable expansion when the admi ion valves are controllable by hand, while the engine is running. Where a separate expansion valve is fitted, it may be effected through shortening its travel by means of a shifting link, ete.. The Corli or drop valves of low pre ure engines usually have their trips regulable by hand, while Meyer expansion plates, adjustable by a hand wheel on the spindle, are frequently fitted with apparatus for the same purpose.