Locomotive appliances, supplement to The science of railways by Kirkman Marshall Monroe 1842-1921

Author:Kirkman, Marshall Monroe, 1842-1921
Language: eng
Format: epub
Tags: Locomotives
Publisher: New York and Chicago : The World Railway Publishing Company
Published: 1903-03-25T05:00:00+00:00

steam that is condensed about the walls of the chamber, as higher boiler pressure became used in loco motive practice, it was found advisable to employ oil in the lubrication of the cylinders.

The boiler of a locomotive is probably forced more at times and more steam is taken from it in a given time than from that of any other boiler of the same size. This causes priming, and moro or less of the water is carried with the steam into the cylinders. Hence, if the water has much of any incrustating matter in solution, much of it reaches the valves and valve seats, the pistons and cylinders, and results in cutting these surfaces to a considerable extent, even with the most approved methods of lubrication.

The original method employed for oiling the valves and cylinders was by means of an oil cup located on top of the steam chest, through which cup oil could be supplied to the valves and cylinders below whenever steam was shut off.

This necessitated the engineer or fireman going to the front end of the engine and pouring oil in these two cups -one on either side. This was neither convenient nor always safe. About the year 1864 the next improvement made was in the placing of these oil cups in the cab and connecting them by sloping pipes to either steam chest. Thus the oil could be supplied by the enginemen without their leaving the cab.

After many designs of hand oilers had been used, the necessity for an even flow of oil to valves and cylinders of locomotives was met in the year 1872 by the introduction of the steam-chest oiler that could be filled, and an adjustment made whereby a constant and controllable flow of oil was had.

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