US565029A

US565029A - pratt

Info

Publication number: US565029A
Authority: US
Publication date: 1896-08-04
Anticipated expiration: 1913-08-04

Description

(Nn Model.)

' N. W. PRATT.

STEAM GENERATOR.

No. 565,029. Patented Aug. 4, i896.

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UNITED STATES PATENT OEEICE.

NAT W'. PRATT, OF BROOKLYN, NEV YORK, ASSIGNOR TO THE BABCOCK & VVILCOX COMPANY, OF NEV YORK, N. Y.

STEAM-c E'NERATOR.

SPECIFICATION forming part of Letters Patent No. 565,029, dated August 4, 1896. Application iiled November 23,1895. Serial No. 669,892. (No model.)

To a/ZZ whom it may concern.-

Be it known that I, NAT WV. PRATT, a citizen of the United States, residing in the city of Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in Steam-Generators, of which the following is a specification.

The invention consists in protecting the rear header of a sectional steam-boiler from burning out by means of a bafiieplate of inasonry or other suitable material, which is located between said header and the combustion-chamber of the generator.

It also consists in providing the convex front head of the steam and water drum with an integral countersunk portion which eX- tends across said head and furnishes a rightangular iiat bearing for the tubes that connect the drum with the front headers of the sectional boiler, whereby the bending of said tubes to secure such a bearing upon a rounded surface is avoided; and it further consists in providing such drumhead with a struck-up integral shoulder to support one end of the steam-pipe in the drum, and in furnishing the body of the drum with a struck-up integral neck to receive the steam-pipe connection, all as hereinafter described and claimed.

In the accompanying drawings, Figure 1 represents the improved sectional steam-generator and its setting in partial front elevation and in partial vertical transverse section on line X X of Fig. 2. Fig. 2 shows a vertical longitudinal section of the same on line Y Y of Fig. 1. Fig. 3 represents a rear elevation of the same with a portion of the setting removed, showing a rear view of the sectional boiler'and of the bathe-plate. Fig. i represents a top view of the steam and water drum and a top view of the front portion of the sectional boiler, a part of the setting being removed in order that the boiler may be seen.

A A A denote groups of generating watertubes which compose the sectional boiler, and are connected at the front end to a vertical header B and at the rear end to a vertical header C.

D denotes the furnace of the generator, and E the combustion-chamber above the saine.

In generators as ordinarily constructed the rear header is unprotected from the flames and heated gases which rise through the coinbustion-chamber, and are driven into contact with said header by the course of the draft. Said header, therefore, burns out after awhile and another has to be substituted at considerable expense and loss of time. In order to avoid this disagreeable result, I construct a baiiie-plate F, of masonry or other suitable material, in front of the rear header C, between it and the combustion-chamber, the said plate surrounding the tubes of the boiler, as particularly shown in Fig. 2. This bafde plate maybe supported upon the bridge-wall G and be tied into the side walls Gr of the setting. The rising flames and heated gases, instead of impinging upon the header, therefore, will be kept from contact therewith by the baie-plate, which isolates the header from the combustion-chamber and preserves the header against being burned out or darnaged by the heat.

H denotes the steam and water drum, which is of wrought metal, surmounts the generating water-tubes, and is connected to the rear header by pipes I and to an extension b of the front header by a horizontal row of pipes J. The front of this drum is convex in shape, being a portion of the surface of a sphere, and in connecting the pipes J to such curved front they have been bent at their inner ends, at considerable expense, so as to produce a rightn angular bearing between them and the drumhead. The object of this portion of my invention is to avoid such bending of the pipes, and this I secure by countersinking the head horizontally at K, so as to produce a 4liat face 7a integral with the head, which extends across the head, as shown in Fig. 1, and will be at right angles to the longitudinal axes of the straight pipes J, as shown in Fig. 4:.

To furnish a support for the interior end of the surface-pipe L without using an applied bracket or ledge constitutes another feature of the invention, and such a support I secure by forming a bulge M on the front head, so as to provide a shoulder fm, upon which said pipe end can rest.

The remaining feature of the invention consists in forming upon the upper surface of the cylindrical body of the drum a struck-up in- IOC) tegral neck N for the reception of the flanged steam-pipe connection O, which enables said steam-pipe connection to be applied more easily and with a more perfect joint, besides lessenng the expense of construction.

Vhat I claim, and desire to secure by Letters Patent, is-

l. In a sectional steam-gen erator, having a series of Water-tubes connected to front and rear headers, a battle-plate surrounding said tubes and located Within the combustionohamber at the front of the rear header, whereby the header is isolated from the chanr ber and protected from the intense heat of the impin gin g gases,substantially as set forth.