Patents Completed.
Page 24
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CONTROL DEV10E.—Serpollet.—No. 17,551/06, dated, under Convention, 5th December, 1903.—The driving apparatus comprises a main steam motor (M),
feed-water heater (0.), a boiler (B), a feed engine (E), and a control device (C). The boiler is heated by liquid-fuel burners and the steam generated passes by the pipe (d) to the control device (C). This comprises (Fig. 2) a chamber divided by a diaphragm (p) having, therein, three small orifices (1, 2, 3), and a larger orifice (4). The orifices (1, 2, 3) communicate with the pipe (/), whereby the feed engine (E) is supplied. This engine operates the pump (G) by which the feed water is circulated through the heater (R), and, also, a pump (H) for supplying the burners with liquid fuel. The orifice (4) communicates with a pipe (g) whereby the main motor (M) is supplied with steam. The exhaust from the motor passes by a conduit (I) to the feed-water heater. The control device has an arm (q) which carries plates {t, t1), and the arm may be moved so that the supply of steam to the feed pump is throttled by shutting off steam from the orifices (1, 2, 3) either singly, or together. Steam may be cut off from the main engine by moving the arm into such a position that the orifice ie1) is covered.
COMPOUND ENGINE.—McDonald. —No. 803, dated 11th January, I906.—The cylinders (al, 0) work on the Otto cycle and perform their working strokes, after'lately. Both cylinders discharge their exhaust into the larger cylinder (ai) through valves (v5, vG, vt, vg). These valves arc opened mechanically, as is, also, the exhaust valve (v10) of the cylinder (0). Communicating with the inlet valves (0, .v7) of the cylinders (0, ai) are chambers (pi, pi), and each of these chambers is closed by a second valve (vt, vi, respec• tively). During the suction strokes of the respective cylinders, the valves (v1, v2) open and fuel is admitted through the passage (o3 or o4) uncovered by the valve, and air enters, simultaneously. The charge thus provided passes into the cylinder fed by the particular valve opened, arid, under normal conditions, the Working is as usual, except that ignition is obtained by heat generated from compression. Mechanism is provided for changing the position of the cams operating the valves, so that the engine may be reversed and, when doing this, the valves (0, v7) are maintained open, so that the chambers (p1, 152) are added to the corn bustion chambers. The result of this is, that the compression is not sufficient to ignite the charge, so that no explosion takes place, while changing the position of the cams. When the change has been effected, the charge is ignited by electrical means, ignition plugs (e3, el) being situated in the chambers (pl, pi). This electrical ignition is thrown into operation only temporarily and, after the reversal has been effected, the usual method of working may he resumed. The engine is, preferably, stopped by opening the valves (-A, v7), so that the cylinders ,remain charged with an explosive mixture whereby starting may be effected by means of the electric ignition.
VAT.VE.—Bramley-Moore.--No, 20,910, dated 20th !.zeptember, l906.—Ti valves of
the poppet type it is, often, found difficult to remove the cotter, owing to the pressure of the spring. To overcome this, the stem (a) of the valve (A) is screw-threaded, and receives a flanged nut (B) upon which the spring (C) presses. A cotter is entered in the stem, and the nut is recessed to ie. ceive it. By screwing the nut up against the pressure of the spring, the cotter can be readily removed and, afterwards, the nut
TW 0-CYCLE EN GI XE.—C ampbel 1 . — No. 1,526, dated 20th January, 1906.— This engine is of the type wherein, after the gases of combustion have been expelled from the cylinder, a further charge is introduced under pressure, and the invention consists in situating the exhaust valve (D) at the end of the cylinder while the inlet valve (F) is situated at a point, approximately, midway of the effective
length of the same. The exhaust valve is mechanically operated, but the inlet valve is controlled by a spring (0) so that, when the pressure in the cylinder decreases sufficiently fer the pressure behind the valve (14) to open the same against the action of its spring, the new charge will be automatically admitted. This takes place just before the piston commences its return stroke so that, practically, a full compression and working stroke is obtained.
ENGINE CYLINDER.—Crossley and Another.—No. 7,115, dated 24th March, 1906.--The cylinder is water-jacketed by
providing it with a shouldered portion extending, continuously, round the cylinder, and making the jacket (a) of such dimensions that the cylinder can be slid bodily into it and then bolted thereto. The cylinder carries a flange adapted to close that end of the jacket remote from the shouldered portion, and this may be rendered water-tight by a suitable liner. The head of the cylinder may be separately secured to the body portion, if desired, as shown in the double-acting cylinder illustrated. In this case the cylinder body (a) is entered in the jacket, as before, and one head carries a flange which is bolted to the jacket at h. The other head (g)
closes the end of the jacket through which the first head was entered, and the two heads are secured together by bolts.