US429574A - James s - Google Patents

Description

(No Model.)

J. S. LEWIS. STEAMYGENERATOR AND FEED WATER HEATER.

No. 429,574. Patented June 3. 1890 rz z.

I 0 Wazizesses. U

UNITED STATES PATENT OFFICE.

JAMES S. LEWIS, OF KIMBALL, VIRGINIA, ASSIGNOR OF ONE-HALF TO ELLIS L. MILLER, OF SAME PLACE.

STEAM-GENERATOR AND FEED-WATER HEATER.

SPECIFICATION forming part'of-Letters Patent No.'4=29,574, dated June 3, 1890. Application filed December 14, 1889 Serial No. 833,737. (No model.)

To all whom it may concern:

Be it known that 1, JAMES S. Lnwrs, a citizen of the United States, residing at Kimball, 1n the county of Page and State of Virginia, have invented certain new and useful Improvements in Combined Steam-Generators and Feedater Heaters; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to feed-water heaters; and 1t consists in certain novel combinations of parts with a boiler-furnace, the same comprising in the maina pipe-coil placed above the grate in a boiler-furnace and connected with a feed-pump at one end and with the boiler below and above the water-line at the other end, and provided with certain check and hand valves, this combination being such that the connections with the boiler can be reversed or otherwise changed, the condition of steam or water in the coil ascertained, the backflow of water to pump or boiler prevented, and a proportionate part of the steam generated by the heater for use before the ma or portion is generated in the boiler, the combination being also such that the coil is steadied and kept in form while under the influences of heat and cold, and its supports may aid in heating the circulating water.

In the accompanying drawings, Figure 1 is a horizontal section of an ordinary boiler, taken above the pipe-coil, showing my invention in plan or top view. Fig. 2 is a front view in section above and in elevation below of said boiler equipped with my invention; and Fig. 3 is a side elevation of the same from the left-hand side, and Fig. at a side elevation of the samefrom the right-hand side; and Fig. 5 is a transverse section of a portion of a boiler, boiler-furnace, coil, and tubular coil-support.

The letter A in the drawings represents a boiler; B, grating; C, pipe-coil; D, tubular coil-support.

The boiler A may be of any known construction, the one represented in Fig. 1 being of a type preferred for places remote from large cities, in which facilities for repair are not aiforded and where boilers of the most simple construction are generally adopted. In the fire-chamber a of this boiler, at a suitable distance above the grating B, transverse supports D, of tubular form, are fastened to the inner wall or casing a of the fire-chamber, said casing being provided with openings, as a whereby communication with the waterspace between said inner wall and the outer wall of the fire-chamber and between the boiler and said tubes is established. On the upper sides of said supports D solid lugs 01 are provided, between which the longitudinal branches 0, which with end connections constitute the pipe-coil C, are placed so that they are held laterally in position, with only that allowance for play necessary for accommodating themselves to the expansion and contraction caused by changes of temperature while the boiler is either operated or is at rest. One termination c of the coil 0 is connected with the pump (not shown) by a pipe E and with the boiler by a branch pipe 6. The pipe E is provided with a checkvalve 6' between the branch pipe 6 and pump. (Not shown.) .The branch pipe e joins the boiler below the water-line, as

shown, and is provided with a check-valve 6 whereby the back flow of water to the boiler is prevented. The other termination c of the coil 0 is connected with a feed-conducting pipe F, which joins the boiler at the same level with the pipe-coil C and at about the middle of its length. Near thefront of the boiler the pipe F is provided with a branch pipe f, which joins the top port-ion of the boiler, and near this point is provided witha hand-valve f, whereby to establish or cut off communication between the coil 0 and steamroom of the boiler, as will be seen. A testpipe f with a hand-valve f is also provided on the pipe F, whereby the fact whether the pipe-coil O is working satisfactorily may be determined, as will be hereinafter described. When the boiler is to be operated, the valve is opened and the valve f closed. The water in the boiler is thus permitted to enter the pipe-coil O and expel any air therefrom which may have found its way into the pipecoil before the filling of the boiler with water. The fire is now started, whereupon steam is generated in the pipe-coil O, which enters the steam-room of the boiler through pipes F f, and in a short time will be of sufficient power to be used for driving the steam-engine connected with the boiler. In order to start the current of steam in the direction of pipe f, and thus secure a permanent flow of steam to the steam-room of the boiler, the hand-valve f is opened to discharge the water between it and the coil C,-the steam therein following the water to said valve. The valve is closed as soon as no more water is discharged, and steam escapes instead. The water in the boiler now becomes gradually heated until the steam thus generated becomes sufficiently powerful to operate the steam-engine, when the valve f will be closed and the pump or injector set to work. The water from the pump flows now through the coil C, whereby it is heated, and through the pipe F into the lower portion of the Water-room in the boiler. If by accident the pump or injector should become inoperative, thereby stopping the current of feed-water throughthe coil, the clicking noise of the check-valve e will cease and warn the operator to open the valve f, and thus allow the quickly-generated steam in the coil to pass into the steam-chamber of the boiler until the pressure in both coil and steam-boiler is balanced. The water in the boiler will now open the valve e and fill the coil, which now co-operates with the boiler as a steam-generator. On such occasions and whenever the operator has any doubts about the perfect performance of the pump and coil he will open the valve f to examine the discharge therefrom, which at the normal working condition will be a solid uniform stream of water, while otherwise steam or steam and water in successive alternating jets will be discharged. The tube-supports D, while keeping the coil steady, they by being constantly filled with water assist in.

heating the feed-water, and by water circulating through them theyare rendered capable of resisting more effectually the destructive action of heat and flame. The supports D might be made solid and serve a useful purpose; but it is preferable to make them tubular.

\Vhat I claim is- 1. The combination, with a boiler, of a feed-water-heating horizontal pipe-coil placed above the grate and in contact with the fire thereof, having direct horizontal communication with the water-room of the boiler at one end, pump-connection and a check-valve at the other end, and a hand test-valve between the pipe-coil and its boiler-connection at the same elevation with the pipe-coil, substan-.

tially as described.

2. The combination, with a boiler, of a horizontal feed-water-heating pipe-coil placed above the boiler-grate in contact with the fire thereof, a pump-connection and check-valve, a lower boiler-connection, a connecting pipe and test-valve beyond said boiler-connection, a pipe connecting the upper portion of the water-room of a boiler with the receiving portion of the coil, and a check-valve therein preventing ascent of water into the boiler, substantially as described.

3. The combination, with a boiler, of a horizontal feed-water-heating pipecoil placed near and above the grates, and connected by its receiving-end portion with the pump and to the upper portion of the water-room of the boiler, and with its dischargingeud portion to the water and high-steam portions of the boiler, and having a pump-water check-valve, a boiler check-valve in the upper water-connection, a hand-valve in the steam-connection, and a test-valve below the steam-connection and beyond the lower water-comma tion, substantially as described.

4. In a boiler, the combination of a waterheating pipe-coil and transverse supports having lugs d, substantially as described.

5. In a boiler, the combination of a waterheating pipe-coil and transverse tubular supports D, having lugs d, and having communication with the boiler, substantially as described.

In testimony whereof I hereunto affix my signature in presence of two witnesses.

JAMES S. LE\VIS.

Witnesses:

L. G. KIBLER, J. 13. BATMAN.

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