Valves and Valve-Gearing: A Practical Text-Book for the Use of Engineers, Draughtsmen, and Students (Classic Reprint) - Tapa dura

Sinopsis

Excerpt from Valves and Valve-Gearing: A Practical Text-Book for the Use of Engineers, Draughtsmen, and Students

The small figures of valves shown on the circumference of valve diagrams illustrate the position of the valves corresponding to various crank positions. It is hoped that they will make the diagrams more readily comprehensible to readers who have not given much previous study to the subject. In the case of slide valves, the and next to the diagram circle represents the front end of the valve that is, the end nearest the crank -shaft. In four-valve engines, the valves nearest the crank-shaft are those drawn adjacent to the diagram, both in the case of steam and exhaust. The arrows denote the direction the valves are moving at the particular position shown: where no arrow appears the valve is in the extreme position of its movement, and has, therefore, no motion at that particq instant.

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