US317532A - Geoege evelyh hall - Google Patents

Description

G. E. HALL.

BOILER FEEDER.

(No Model.)

No. 317,532. 'Patentied May 12, 1885.

INVENTOR WITNESSES:

UNITED STATES PATENT OFFICE;

GEORGE EVELYN HALL, OF NEV YORK, N. Y.

BOILER-FEEDER.

SPECIFICATION forming part of'Letters Patent No. 317,532, dated May 12, 1885.

Application filed June 21, 1884. (Yo model.)

To all whom it may concern:

Be it known that I, GEORGEEVELYN HALL, of the city, county, and State of New York, have invented certain new and useful Improvements in Boiler-lleeders and Means for Preventing Explosions in Steam-Boilers, of which the following is a specification.

It is a well-known fact that if the pressure on the surface of a highly-heated liquid-such as watercontained in a steam-boiler or other closed vessel is from any cause removed, the water will no longer remain in the form of water, but all or a large portion of it will be instantly converted into steam. The expansive or acting force of the steam so produced will depend upon the volume of water present, its

temperature, and the amount of pressure which has been removed. Very many conditions occur in practice which 'act to lessen or decrease the pressure acting on the surface of the water in the boiler. Thus, if a large body of cold water be delivered into a boiler when the engine, which-receives its steam from the boiler, is at rest, or if the engine be stopped immediately after the boiler has been filled and then suddenly started, the concussive action of the steam and the agitated or violent motion of the water within the boiler will suddenly bring to the surface and project into the steam-space and steam a large quantity of water considerably below the temperature of the water previously in the boiler, and condensation will as suddenly take place, causing an explosion. in case of extremelylowwater, or by reason of an unusual motion of the boiler, as by the pitching of a ship, if cold water be injected into the steam-space, a like condensation of the steam will occur,producing a similar result.

My invention relates to the means employed for insuringthat the feed-water supplied to the boiler shall be always delivered at its lower portion and out of possible contact with the steam-spaces and steam; and it consists in providing a longitudinally-arranged pipe or pipes bent upon itself or themselves to form parallel arms,one of which arms is perforated with a large number of small holes, oris provided with a large number of jet-pipes arranged in or along the under surface of the parallel arm, the distribution of the holes or jets being such that the larger number are located immediately over that portion of the bottom plates of the boiler which are immediately over or which act as the roof of the fire-box. By this means I am enabled, first, to partially heat the fecd-water by its pas sage through the non-perforated arm, and to insure a uniform distribution throughout the water in the boiler, and thus render the presence of any large body of cold water in the boiler impossible. This arrangement also enables me to keep the lower surface of the boiler free from deposits or incrnstations, which usually form thereon, and are compacted by the consequent hammering or percussive action, as previously described, the action of the jets of water being to wash the lower surface of the boiler and to stir up and distribute any earthy deposits which may form thereon. It also acts to increase the cir oulation of the water, and the earthy matter will either be kept in solution or deposited by the upward flow of the water and steam on the sides or upper part of the shell where it can do no harm.

In the accompanying drawings, forming a part of this specification,similar letters of reference indicate like parts, in which- Figure 1 is a central longitudinal section. Fig. 2 is a eross section on the line :0 .r of Fig. 1. Fig. 3 is a view,partially in horizontal section, of the tube for supplying the feed-water.

In the drawings, A represents a steam-boiler, which may be of any approved design, and provided with fire-fines B B.

O C C are tubes or pipes,through which the steam is conveyed from the boiler. The said pipes are provided with openings or perforations D, the arrangement and particular de scription of which I have fully described and claimed in a previous application filed by me April 19, 1884.

H is the steam-dome, and I the steanrexit pipe.

L represents the feedpipe, which may be of any desired diameter, and formed of the two tubes M M, arranged longitudinally along the lower portion of the boiler and parallel to each other,and joined together at one end to form a continuous sinuous passage. The tube M is attached to the end of the boiler at 0, so as to be brought in contact with the pipe from the source of watersn pply. The point where the Ton n veyed to the boiler.

, forated, being a simple continuous tube,whicl1 and so arranged as to distribute the streams of wvater on the lower surface of the boiler. I prefer to locate the greatest number of 0pen ings or orifices over that portion of the boiler under which the fire-box is located, and the number and size of said openings or orifices should be such that the sum of their areas shall be equal or slightly greater than the area of the passage through which the water is con- The tube M is not perhas for its object to convey the cold water injected into theboiler through the hot waterin the boiler, and thereby raise its temperature before it is delivered into the boiler through the perforations N in the tube M.

I would have it understood that I do not limit myself to the number of unperforated arms or tubes in which the water is carried to be heated; neither do I limit myself to the number of perforated arms through which the water is delivered into the boiler.

The subject-matter claimed in this present case is limited to that particularly recited in the following claims, and I here disclaim in favor of my prior application filed April 19, 1884, any and all patentable subject-matter common to said application and this present case which is not specifically claimed herein.

and adapted to deliver water in downwardlyprojecting jets and in varying quantities over the. lower surface of the boiler.

2. The combination,with a steam-boiler,of a feed-water pipe or pipes arranged in the lower part of said boiler and below the lowest waterlevel, said pipes bent to form parallel arms, the under side of one of which is perforated orprovided with small jet-pipes, the sum of y the area of the said perforations or openings in jet-pipes, being slightly greater than the area of the pipe or passage through which the water is conveyed to the boiler.

3. The combination,with asteam-boiler,of a feed-water pipe arranged within the lower part of said boiler, said pipe formed of two arms arranged parallel to each other, one of which is perforated upon its lower side in such a manner that the number of perforations shall be greatest over that portion of the boiler that is located over the fire-box, substantially as described.

GEO. EVELYN HALL.

\Vitnesses:

GEO. H. Bmrrmrm, A. E. SEXTON.

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