Locomotive Text for Engineers and Firemen: A Complete Treatise on the Engine, Electric Headlight and Standard Code of Train RulesFred McArdle, Henry Helmholtz |
Other editions - View all
Locomotive Text for Engineers and Firemen: A Complete Treatise on the ... Fred Mcardle No preview available - 2017 |
Locomotive Text for Engineers and Firemen; a Complete Treatise on the Engine ... Fred Mcardle No preview available - 2013 |
Locomotive Text for Engineers and Firemen: A Complete Treatise on the ... Fred McArdle No preview available - 2017 |
Common terms and phrases
adjusted admitted allow armature back driver run back end back spring binding post block placed blow boiler check bolt broken brushes carbon cause cellar check-valve clamp closed clutch compound compound locomotive condenser connected crank pin crosshead cylinder cock delivery pipe disconnected dynamo eccentric crank electrode electromotive force engine truck engineman exhaust fire fire-box flues force forward front end fulcrum governor hanger heat Heater Cock high pressure cylinder injector inside admission lamp lap and lead lead lever leak Lock-Nut locomotive low pressure cylinder lower rail lubricator main rod middle driver motion moved nozzle oil reservoir operation overflow packing pass piston valve placed on top Plate plug position prevent radius rod regulating valve removed reverse lever rings sand Screw seat shaft shown in Fig side rods spring rigging steam port steam pressure steam valve steam-chest stroke tank throttle trailer tubes valve-stem Walschaert valve gear water-valve wedge wire
Popular passages
Page 263 - This milder exhaust does not tear the fire, nor carry unconsumed fuel through the flues into the smoke-box and thence out of the smoke-stack, but is sufficient to maintain the necessary rate of combustion in the fire-box with a decreased velocity of the products of combustion through the flues. The heating surfaces of a boiler absorb heat units from the fire and deliver them to the water at a certain rate. If the rate at which the...
Page 55 - Isver is drawn back to the stop. When the pin in the wheel of the regulating valve is at the top, the inspirator will deliver its maximum quantity of water; to reduce the feed, turn the regulating wheel to the right.
Page 304 - In diagram 4, the piston is at the extreme forward end of the stroke; the angle assumed by the lap and lead lever has moved the valve back a distance equal to the lap plus the lead; the front port is open for the admission of steam and the back port is open to the exhaust. In diagram 5, the piston is moving toward the back end of the cylinder and the valve has just closed the front port to tb.3 admission of steam, showing the cut-off position of the valve on the back stroke.
Page 311 - ... outer section of the lift shaft arm, take off the cap of the slip block, lift out the end of the radius rod and remove the slip block. The parts that it is necessary to take down are shown in the foreground. The link block is secured in the center of the link in the same way as in the previous case. So far, we have not considered any accidents which would require blocking the valve to cover the ports. In all cases where this is necessary, if the engine has no relief valves in the cylinder heads...
Page 289 - A," the eccentric will have moved the valve to its extreme forward position and the back port will be opened for the admission of steam behind the piston and the engine will run forward. If, however, with the main pin and eccentric crank in the same position, the valve stem was connected to the upper end of the link, as shown in diagram "B...
Page 263 - The improved action of the boiler can be obtained only by the use of the compound principle, while the use of the compound principle enables the locomotive to develop its full efficiency under conditions which in a single-expansion locomotive would require a boiler of capacity so large as to be out of the question under the circumstances usually governing locomotive construction. It is therefore evident that where both locomotives are exact duplicates in all their parts, excepting the cylinders,...
Page 287 - Assuming that the engine is to run forward, with the main pin on the back center, as shown, the eccentric crank pin must be on the top quarter ; in which case the valve will be in the central position on its seat with all ports closed.
Page 303 - As the valves are inside admission, however, the radius rod is connected to the lap and lead lever above the valve stem. The valve, in each case, has thus been moved back, instead of forward, by the movement of the lap and lead lever ; and the back port is open to the live steam and the front port to the exhaust. Going back to Fig.
Page 82 - ... the valve gradually settles down ; this action continues until the area of the opening into the well is less than the area of the apertures in the arms, and the valve promptly closes. The point of opening can be readily changed while under steam by screwing the threaded bolt at the top of the cylinder up for diminishing or down for increasing the pressure.
Page 82 - These arms have passages EE for the escape of the steam or other fluid from the well into the air when the valve is open. This well is deepened so as to allow the wings XX of the valve proper to project down into it far enough to act as guides, and the flange G...