. The science of railways . ginemenwithout their leaving the cab. After many designs of hand oilers had beenused, the necessity for an even flow of oil to valvesand cylinders of locomotives was met in the year1872 by the introduction of the steam-chest oilerthat could be filled and an adjustment madewhereby a constant and controllable flow of oilwas had. In 1883 the first r/o?r>^ f/ro/9-/^ef/lubricator madeits appearance, one being provided for each cyl-inder. These lubricators were located in the cabwith pipes leading to each steam chest. In 1885 this was changed to the up drop-feed,one lu
. The science of railways . ginemenwithout their leaving the cab. After many designs of hand oilers had beenused, the necessity for an even flow of oil to valvesand cylinders of locomotives was met in the year1872 by the introduction of the steam-chest oilerthat could be filled and an adjustment madewhereby a constant and controllable flow of oilwas had. In 1883 the first r/o?r>^ f/ro/9-/^ef/lubricator madeits appearance, one being provided for each cyl-inder. These lubricators were located in the cabwith pipes leading to each steam chest. In 1885 this was changed to the up drop-feed,one lubricator for each cylinder being used, how-ever, until 1886, when the double sigJtt feed luhri-cator was put in use. From the time of the intro-duction of the air brake and consequent use ofthe air pump up to 1888, a sepaiate lubricatorwas used for air pump lubrication. In thatyear, however, another feed was added to thecylinder lubricator making it a triple sight feedlubricator, as at present used. 324 APPENDIX G. Fig. Triple Sight-Feed Loco^viotive Cylinder and Air BrakeLubricator. (Nathan.) A—Filling Plug. B—Steam Valve. C, C, C—Regulating Valves. D—Water Valve. E—Condenser. F, F, F—Safety Valves. O, O, O—Auxiliary Oilers. W—Waste Cock. appendix 40. 325
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