Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . UGE. See Lathe-Tools, Turning. GOVERNORS. The ordinary steam-engine governor consists of two heavy balls suspended bylinks from a spindle, forming a combination known as the conical pendulum, and caused to revolveby some connection with the shaft of the engine. A conical pendulum, if there is no friction in thejoints of the rods, stands in a position corresponding to the speed at which it is running. Theheight of the pendulum is the vertical distance of the vertex of the cone formed by
Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . UGE. See Lathe-Tools, Turning. GOVERNORS. The ordinary steam-engine governor consists of two heavy balls suspended bylinks from a spindle, forming a combination known as the conical pendulum, and caused to revolveby some connection with the shaft of the engine. A conical pendulum, if there is no friction in thejoints of the rods, stands in a position corresponding to the speed at which it is running. Theheight of the pendulum is the vertical distance of the vertex of the cone formed by the links, or thelinks produced, above the plane of the centres of the balls; and this height, which determines the posi-tion of the balls, is equal to the following expression, when there is no friction in the joints, or other resistance: -, ;—: — ; nr If, for example, the number of revolutions per minute is 100, (revolutions per niinute) . the height is 35,208 -4- 10,000, or about 3i inches. The following table, calculated by Mr. CharlesT. Porter, gives the speeds corresponding to various heights:. HEIGHT IN Revolutions per HEIGHT IN Revolutions per HEIGHT IN Revolutions per HEIGHT IN Revolutions per INCHES. INCHES. Minute. INCHES. Minute. INCHES. Minute. 1 14 8 21 2 15 9 22 40 3 16 10 • 23 4 17 11 24 5 13 . 80 12 25 6 53 19 43 13 52 26 T 51 20 The actual height at which the balls revolve, in practice, is ordinarily much greater than that givenin the preceding table—partly for the reason that there is some friction in the joints, but principally c-e GOVERNORS. because a weight or some other resistance is added, to increa
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