DOUBLE-ACTION PARALLEL ROTARY STEAM-ENGINE.
THE grand point of excellence in this invention, and which principally constitutes its complete superiority over all other rotaries, consists in the parallel principle; which gives an equal pressure on opposite sides of the wheel at the same time. This peculiarity completely evades the main obstacle which has uniformly prevented the success of steam-wheels and water-wheels, which have been constructed on the arbitrary principle. They have been subject to such severe pressure on one side, that the central pivot would soon become worn so as to vary from the true centre. A steam-wheel capable of working ten horse-powers, may be constructed for $50. Water-wheels on this plan may be made to run under water, so as to be safe from the effects of frost, and will work double the power of an ordinary water-wheel. A blow-wheel on this plan, will drive about four times as much wind, in proportion to the power applied, as the common fan-wheel. The right of constructing and using these wheels, in either capacity, will be given on terms that cannot fail to prove satisfactory. For further intelligence apply at this office.
EXPLANATION.-A horizontal wheel is mounted on a vertical shaft, A. In the periphery or sides of the wheel are four semicircular cavities, in which the eliptic floats or wings, B B B B, are mounted on vertical pivots. The dark part of the engraving represents two channels through which the steam, water or air passes, between the wheel and the casing. The fluid enters E E, and is discharged at F F. The four wings do not turn on their pivots, but are kept in their parallel position by means of four cranks at the head of the pivots, C C, which connect with four arms which project from a circle which compasses the centre shaft, and is kept in its position by three friction-wheels, the axle-pivots of which are attached to an upper floor or casing, which is to be placed over the wheel. Thus it will be seen that each opposite pair of wings, in their turn, fill the two channels, so that the two currents of fluid cannot pass nor escape but by the motion of the wheel;-thus driving, or being arbitrarily driven, by the wheel, the two forces so balancing each other that the wheel is not subject to the least friction or wear.