The Working Engineers Practical Guide to the Management of the Steam Engine And
The book The Working Engineers Practical Guide to the Management of the Steam Engine And was written by author J Hopkinson Here you can read free online of The Working Engineers Practical Guide to the Management of the Steam Engine And book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Working Engineers Practical Guide to the Management of the Steam Engine And a good or bad book?
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" Fig. 26 shows a section of a steam cylinder and valves, and the lever which works them, the eccentric which gives motion to the lever not being shown the valves in this figure being in the reverse position to that shown in Fig. 25. The valves a a are made of such length as to be equal to three times the opening of the ports ; and it will be seen by tracing the movement which will take place in the parts of Fig. 25, that when the stroke in the upward direction has been completed, and the steam... or induction valve opened to the required extent, and steam admitted above the piston, the steam or induction valve will be closed by the time the piston has moved about one-third of its stroke ; but this may be varied, and the exhaustion port will remain open, and the move- ment of the eccentric, and the parts actuated thereby, will, near the end of the stroke, close the exhaustion port at the upper end of the cylinder, and bring the parts into the positions shown in Fig. 26 ; and it will also be seen that these effects will be consequent on the enlargement of the valves in respect to the ports over which they work, and the extent of movement given to the valves, whereby one or other of the valves can be moved for a considerable length whilst over its port, without uncovering 84 85 Figure No* 26.
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