. Science of railways . Fig. 1 480 LOCOMOTIVE APPLIANCES. means for depositing graphite into the valves and cylindersis provided by the Campbell system for the injection of drygraphite by means of air, which is a positive method as it hasbeen demonstrated that it cannot be properly distributed whenmixed with oil. A small amount will give instant relief to abadly working engine as reports show that with the use of thegraphite lubricator the most troublesome engines have beenquickly restored to full working capacity due to the graphitesmoothing over the frictional surfaces of the valves, valve.
. Science of railways . Fig. 1 480 LOCOMOTIVE APPLIANCES. means for depositing graphite into the valves and cylindersis provided by the Campbell system for the injection of drygraphite by means of air, which is a positive method as it hasbeen demonstrated that it cannot be properly distributed whenmixed with oil. A small amount will give instant relief to abadly working engine as reports show that with the use of thegraphite lubricator the most troublesome engines have beenquickly restored to full working capacity due to the graphitesmoothing over the frictional surfaces of the valves, valve. Fig. chambers, cylinders and pistons, thereby minimizing frictionalresistance. This lubricator is not a complicated machine requiring anexpert to keep it in operating condition. It cannot get out oforder and there are no maintenance charges. It is only neces-sary to keep dry flake graphite in the cup and use the leverhandle when necessary. A cup holding about one pound of graphite is placed inthe locomotive cab, convenient to the engineer, and is con-nected up by means of a %-inch pipe with the main reservoir. LOCOMOTIVE APPLIANCES. 481 Another %-inch pipe extends from this cup to a special divid-ing tee to be located directly back of the center of the cylin-der saddle, from which i/4-inch pipes extend, and are tappedinto each relief valve. In case the locomotive is not equippedwith relief valves, tap the oil plug into the top of each chestand connect the i^-inch pipes, putting a check valve as nearto the oil plug as possible in order to avoid back the lever handle in ru
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