US310071A

US310071A - Steam-boiler

Info

Publication number: US310071A
Authority: US
Publication date: 1884-12-30
Anticipated expiration: 1901-12-30

Description

(No Model.)-

J. MITCHELL.

, STEAM BOILER.

Patented Dec. 30, 1884.

I WITNESSES l INVENTOR.

ATTORNEYS.

N. PETERS. Plmmuum m m-r. Washington. Ill.

; ATENT rricn.

JOHN BIITOHELL, OF LOUISVILLE, KENTUCKY.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 310,071, dated December 30, 1884.

Application filed September 19, 1883. Renewed Novemherlfl, 1884. (N0 model.)

To all whom it may concern:

Be it known that I, JOHN MrrcirnLL, a citizen of the United States, residing at Louisville, in the county of Jefferson and State of Kentucky, have invented certain new and useful Improvements in Steam-Boilers; 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.

This invention consists in certain improvements in the construction of steam-boilers, as hereinafter described and claimed.

In the drawings, Figure 1 represents a longitudinal vertical section of aboiler constructed according to my improvements. Fig. 2 represents a sectional plan view thereof. Fig. 3 represents a section on the line 3 3 of Fi 2. Fig. 4 represents a vertical section of the com bastion-chamber.

My invention consists, essentially, in constructing locomotive and other steam boilers with the combustion-chamber in the center of the waist of the boiler, and in extending a perforated pipe transversely across said combustion-chamber, said perforated pipe connecting at one end with either the exhauststeam pipe from the engine or with a suitable live-steam supply, whereby steam is supplied to the combustion-chamber for the purpose of increasing the combustion of the smoke, cin- I ders, and gases therein.

A represents the walls of a boiler, of ordinary construction.

13 represents the fines or tubes, which, instead of extending the entire length of the boiler, are of half the usual length.

0 represents the combustion chamber, which is arranged centrally or nearly centrally of the waist of the boiler, and with which the inner ends of each series of flues connect. By thus arranging the combustion-chamber centrally of the waist of the boiler, a much larger quantity of the smoke resulting from the combustion of the coal or other material is consumed than where the combustion chamber is placed at the rear end of the waist;

and by forming the dues of half-lengths, instead of extending them continuously throughout the length of said waist, their expansion and contraction are considerably lessened or avoided, they are more easily removed from and placed in position, and a great saving is effected by their use, as it is well known that the tubes are more inj uriously affected at those ends nearest the fire-box than at their extendin about half around on the upper side. This pipe has a closed end, I), which,

when said pipe is passed through a hole in or about the center of one side of the combustion-chamber, is secured to theinner face of the opposite end ,thereof by any suitable means. The opposite end, 0, of said perforated pipe is screw-threaded, and is screwed into position and supported therein within a screw-threaded flange, (l, on the outside of the waist of the boiler. This screw-threaded end is open, and has suitable connection either with the exhaust-pipe of the engine, by means of which the exhaust-steam therefrom is conveyed to such perforated exhaust-pipe, or it is similarly connected with a live-steam supply, as desired or found convenient. Steam, either exhaust or live, as desired, as it passes into this perforated tube E, escapes therefrom through the perforations a in the form of jets or spray into the combustionchamber, and as the smoke, cinders, and gases collect in said combustiolrchamber and co me in contact with the flame and the steam jets or spray, an increased consumption of the products of combustion is secured over that secured by the ordinary form of boiler.

Having thus described myinvention, Iclaim i chamber, substantially as and for the purpose and desire to secure bv Letters Patent of the I set forth.

n [0 United States In testimony whereof I affix my signature in A tubular steam-boiler having a combuspresence of two witnesses. 5 tion-chamber dividing the tubes transverse- JOHN MITCHELL.

Vitn esses: I

WM. RUSSELL, W. W. MELONE.

1y between the fire-box and uptake, in 00111- bination with a perforated pipe through which steam is admitted to said combustion-