US372713A - Utilizing exhaust-steam - Google Patents

Description

(No'ModeL) R. H. F. 8:; N. H. SEWALL.

UTILIZING EXHAUST STEAM.

No. 372,713. Patented N v. 8, 1887.

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N. PETERS, Phulollilhcgrzphur. Washin ton. D. c.

NITED ATENT Fries.

ROBERT H. F. SEVALL AND NICHOLAS H. SEIVALL, OF SMITHLAND, LOUISIANA.

UTlLlZlNG EXHAUST- STEAM.

SPECIFICATION forming part of Letters Patent ItTo. 372,713, dated November 8, 1887.

Application filed November 15, 1886. .Serial No. 218,953.

To aZZ whom it may concern.-

Be it known that we, ROBERT H. F. SEWALL and NICHOLAS H. SEWALL, of Smithland, Pointe Goupe parish, and State of Louisiana, have invented a new and useful Improvement in Utilizing Exhaust-Steam, of which the following is a specification.

This invention is an improvementin steamengines, whereby the exhaust-steam may be utilized; and it consists in certain features of construction and novel combinations of parts, as will be described and claimed.

In the drawings,Figure 1 shows the improvement in connection with a boiler and a steamengine, and showing the improvements as adapted for utilizing only a part of the exhaust; and Fig. 2 is a detail View showing the improvement as adapted for utilizing all the exhaust.

The boiler A and engine B may be of any suitable construction. The cylinder 1) of the engine is connected by a pipe, 0, with a supplemental cylinder, D, made usually,as shown, of less crosssectional area than the engine-cylinder. Such pipe 0 receives the exhaust from the cylinder 1) and conducts the exhaust from such cylinder 1) to the supplemental cylinder D. The pipe 0 may open into the cylinder D, near one end thereof, as shown in Fig. 1, or about midway its ends, as shown in Fig. 2.

A pipe, E, connects with the supplemental cylinder and serves as a channel,through which the exhauststeam is directed in its passage to the boiler. In the construction shown the pipe E leads into a blower, k, which is connected by pipe E with the boiler; but while such blower is preferred it is manifest it might be omitted without departing from some of the broad principles of my invention.

The pipe E in Fig. 1 opens into the supple mental cylinder near one end thereof. In Fig. 2 the pipe E opens into the cylinder near one end, and has a branch, 6, which opensinto the end of cylinder opposite that into which the main portion or stem of the pipe opens.

It will be noticed that the pipes E and C have check-valves l, the operation of which will be understood from the drawings. The piston F operates in cylinder D, and has its stem f suitably supported, usually on a cross-head, G, as shown.

(No model.)

' To the piston, and preferably through the medium of its stem and the cross-head, is connected one end of a lever, II, pivoted between its ends, and having its other end connected with some moving part of the engine, preferably the cross-head, as shown in Fig. 1.

In operation it will be seen that the exhauststeam is forced into the supplemental cylinder, and thence by the piston F back into the boiler. Now it will be seen that the piston not only forces the exhaust toward or into the boiler, but produces a suction, which draws the exhaust into cylinder D and prevents any backpressure on the engine-cylinder.

Now, while we prefer the lever H, connected and operating as shown, it is'manifest that instead of such lever the piston of the supplemental cylinder might be run in direct line with the main shaft by means of an eccentric similar to the construction for operating the common slide-valve.

In order to give the exhaust-steam proper force to enter the boiler A, and also to provide a means for, in part at least, feeding water to said boiler A, we provide the pump I, which may be an ordinary steam-pump having a water-supply pipe,- I. From this pump a pipe, i, extends into the pipe E, and is provided with a nozzle, J, pointing in the direction of 80 i the boiler A, forming an injector, which, by suction and direct action, gives the exhauststeam an impetus in such direction, and also, by means of the jet of water, in part at least, condenses such exhaust-steam. The pump I, through pipe i,serves to inject a jet of cold wa ter into the pipe E and forces the steam toward the boiler. In its passage between the pump I and the boiler A the steam and water pass through a pump, K, preferably of a rotary form, as shown, which in practice is given afast motion and operates to force the steam, &c-., into the boiler.

Now it will be understood that, in addition to serving as a means for aiding in forcing exhaust-steam back into the boiler, the pipe E and pumps I and K may be used for forcing back into the boiler steam which has been employed for boiling sugar or other material.

Having thus described our invention, what we claim as new is- 1. The combination of the boiler, the sup the pipe between the boiler and supplemental cylinder, substantially as set forth.

3. The combination, with the boiler A, of r 5 the pipes E E, the piston-cylinder D, the pump K, the pump 1, and the pipe i, leading from pump 1. into pipe E, substantially as set forth.

ROBERT H. F. SEWALL. NICHOLAS H. SEWALL.

oted lever connected at one end with the pis- Witnesses: ton and at its opposite end with the engine, the I. TORRAS, pump Land the pipe extended therefrom into W. O. NELSON.

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