Transactions of the American Society of Mechanical Engineers Volume 13 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1892 Excerpt: ...load governing mechanism will permit. (9) The variations, through any cause, of the driving effort on the piston and internal friction of the engine, as distinct from the external load variations, to be controlled by effective and sensitive centrifugal governing. (10) The compounding of the centrifugal and the load governing forces to be effected in such a way that they shall operate upon the valve independently of each other, or more or less dependency. In discussing Mr. F. H. Ball's paper before this Society on the new principle in steam-engine governing, Mr. W. C. Kerr states the primary requirements of an engine governor to be: (1) A reasonably small variation in speed, light or loaded; (2) a very small acceleration for an instant, following a change of load; and, where the most delicate regulation is required, this instantaneous acceleration is of much greater consequence than the difference in revolutions between light and loaded conditions. Transactions of the American Society of Mechanical Engineers, Vol. IX., 1887-88, pp. 315, 816. v A compound automatic cut-off valve mechanism, operated by centrifugal and load governing forces, presents a somewhat satisfactory solution of almost all of these questions. Consider the case of a single valve for a single cylinder engine. The two governing forces may be introduced by making the valve of the piston type, and giving it a variable movement of reciprocation, with a variable movement of rotation or of oscillation, the movements being independent of each other. The valve friction will be reduced to a minimum by combining reciprocation with rotation. The centrifugal governing forces control the variable reciprocation; the load governing forces, the variable rotary movement, or vice versa. An electro-magnetic ...