FRANCE.

1185

Fig. 1.

n sarasi

■ Ssiria |

Fromont’s trouble Turbine.—Sectional Elevation.

Fig. 1.—Tliis figure represents a sectional elevation oftlie turbine sent to tlie Exhibition.

Fig. 2.—This illustration is a sectional elevation of adouble turbine as applied to the purposes of an ordinaryprime-mover, and in situ; the letters of reference corre-sponding in both figures, their equivalents need hero beonly once given:—

The dotted line represents the upper level of the waterretained within the canal formed by the wall A at oneextremity, and the floor, or bed, 11. To tliis canal thewater of the river is conducted, and it represents in itsrelation to the turbine the mill-pool of the ordinary water-wheel, being its source of supply. The course of the waterin the communication of its movement to the engine isinto the chamber of C, from which it escapes through acurved orifice, and strikes against tlie curved sides of the

turbine D, which are arranged in the opposite direction.By this, rotary force is generated, which is communicatedthrough the perpendicular shaft, and thence led off at will..The machines made by the present exhibitors possess asimple arrangement for increasing or diminishing then-force and velocity. This is represented by the letters V V,E E, 11, and 11 1). Of these, the letters E and I repre-sent additional compartments of the turbino D, whichmay be opened or closed at. will by the rods V V, with acorresponding increase or diminution of power. By con-necting these rods with a Watt’s governor, placed on aperpendicular shaft, called the regulator, R R, a methodof regulating the velocity of the engine is at once obtainedthe centrifugal force of the balls acting alternately uponthe opening or closing of these compartments, and pro-ducing, as the result, a constant and balanced movementof the whole machine.