US16071A - John r - Google Patents

Description

UNITED STATES Parent rrrcn,

JOHN R. SEES, OF NElV YORK, N. Y.

ARRANGEMENT OF MEANS FOR HEATING FEED-WATER OF LOCOMOTIVE-ENGINES.

Specification forming part of Letters Patent No. llfi,'IWll, dated November 11 1856.

T0 ctZZ whom it may concern:

Be it known that I, JOHN R. SEES, of the city, county, and State of New York, have invented a new and useful Arrangement for Heating the Feedater of the Boilers of Locomotive-Engines on its Passage from the Feed or Force Pump to the Boiler; and I do hereby declarethat the following is a fulland exact description of the same, reference being had to the accompanying drawing, and to the letters oi. reference marked thereon, in which Figure 1 is a perspective view of the smokehox end of a locomotive-boiler, showing the arrangement of the heating-pipes and their connections; Fig. 2, a vertical section, and Fig. 3 a top view, of the heating-pipes detached, and Fig. e a vertical section of the double-acting check-valve and its chamber detached.

A is the smoke-box of a locomotive-boiler with the end covering removed to show the arrangement of the heating-pipes and their connections; B, a portion of the body or cylindrical part of the boiler; O, the rear end of the tubes through which the products of combustion pass to the smoke box and stack; D, the pipe from the feed-pump, attached to the lower end of the checlevalve chamber E 5 F, pipe connecting the check-valve chamber to the bottom of the outer coiled heating-pipe G; H, pipe connecting the top of the inner coiled heating-pipe I to the body ofthe boiler.

G and I are the heating-pipes formed of two separate coils of pipe coiled in cylindrical form and placed one within the other at such distance apart as to form between them an annular space of sufficient capacity to form a passage through which a portion of the heated gases can pass. The bottom of the cylindric coils is placed just below the lower tier of tubes, and the top of them at or below the height of the water-line of the boiler, for purposes hereinafter mentioned. The heating-pipes and their connecting-pipes are made about equal in size to the feed-pipe D, to create as little obstacle to the free passage of the water through them as is consistent with the other requirements of them.

The feed-water is taken in at the bottom of the outer coil of heating-pipe and passes to the top of it, and is carried to the inner coil at the bottom by the connecting-pipe J, and

is taken from the top of it by the connectingpipe H to the body of the boiler; or the feedwater may be taken in at the top of the outer coil, and the two coils may be connected together at the bottom of each, and the water taken from thetop of. the inner one, as before described. The coils of both cylinders are placed apart from each other about one-fourt h inch to afford a passage for the heated gases between them. The eXl'iaust-pipes K K of the engine are so placed that their nozzles shall come beneath the lower line of the in ner cylindric coil and within its interior opening, for the purpose of guiding the column of exhaust-steam to the base of the smoke-stack, to prevent its being broken up and disseminated throughout the smoke-box, by which its effect would be injured, and to produce within the inner cylindric coil a displacement of the air and gases that will cre ate a passage throughit of the freshly-heated gases from the tubes. The heated gases from the lower tubes find entrance to the inner cylindric coil directly at the bottom of it, that from the middle tiers of tubes through the interstices between the coils, and that from the upper tiers of tubes through the annular space between the inner and outer cylinders by the down ward draft created thereby, theimp ulsive action oftheexhaust-steam beinggreaterat the bottom than at the top of the cylindric coils, so that the action of the exhaust-steam equal izes the draft through all the tubes and makes them all equally effective. By taking the feed-water into the outer coil of heating-pipe it gets sufficiently heated before reaching the inner coil to prevent the condensation of the exhaust-steam within the inner coil thatwould occur it but a single coil were made use of.

L is a circulating'pipe attached at one end to the top of the check-valve chamber E and at the other to thebodyof the boiler, through which a circulation of the water of the boiler is kept up through the heating-pipes when the supply from the feed-pump is shut on";

M is a double-acting check-valve so constructed and arranged within the chamber E that when the feed-pump is forcing water to the chamber the lower valve of it is opened to permit that water to pass through the pipe F to the heating-pipes, while the upper valve of it is closed, and when the supply of water from the pump is shutoff or stopped that the lower Valve is closed and the upper one opened to allow the water in the boiler to circulate t-h rough the heatingpipes and keep them filled. This circulation avoids the danger of the pipes being emptied of water by being overheated, when the feed-water is shut 0% from them, and can only occur when the heating-pipes and their connections are placed at or below the height of the water-line of the boiler.

N is the base of the smoke-stack or chimney.

The heating-pipes are represented as being attached to only one of the pumps of the engine, which is all that is ordinarily used, for the purpose of saving the expense and encumbrance of the additional parts requisite to at tach it to both. The duplicate pump being generally used onlyin case of a failure in the operation of the other, I would attach it directly to the boiler, as at present practiced.

By constructing the heating-pipes in the form and arranging them in the position and manner described the feed-water is heated by the escape-heat, that would otherwise be wasted, to a point that produces a desirable economy in fuel over the present general practice of feeding the boiler with cold water,while they equalize the draft throughout the whole series of tubes and increase their efficient action. They are compact in form, are easily removed and replaced when it is necessary to repair them or to get at the tubes of the boiler to repair, take up no room that is required for other purposes, and present less obstruction to the passage of Water through them than can be effected in the same length of pipe arranged for the same purpose in any other practical form.

I do not claim heating the feed-water of a steam-boiler in its passage from the feed-pump to the boiler, nor heating it by the waste or escape-heat from the boiler, nor placing the heating-pipes in the smoke-box of the boiler, as they are known and used; neither do I claim the use of the circulating-pipe and double-acting check-valve, nor placing the heating-pipes and their connections below the water-line of the boiler, as secured to me by Letters Patent dated August 5, 1856; but

7 hat I do claim as my invention, and de sire to secure by Letters Patent, is

The construction of the duplicate cylindrical coils G and I and their arrangement in relation to the smoke-box A, the exhaust-pipes K K, the tubes 0, and the base N of the SIHOkQ'SULCli of a locomotive-boiler, as and for the purposes herein set forth.

JOHN R. SEES. Witnesses:

FRANCIS S. Low, M. I-IAsKELL.

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