US791314A

US791314A - Water-tube steam-boiler.

Info

Publication number: US791314A
Application number: US21526004A
Authority: US
Inventors: John D Bowne
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-07-05
Filing date: 1904-07-05
Publication date: 1905-05-30
Anticipated expiration: 1922-05-30

Description

No. 791,314. I PATENTED MAY 30, 19051 J. D. BOWNE. I

WATER TUBE STEAM BOILER.

APPLICATION FILED JULY 6, 1904.

N NIBERLQY Fi,r3-l

Patented May 30, reps.

PATENT OFFICE.

JOHN D. BOWNE, or NEW YORK, N. Y.

WATER-TUBE STEAM-BOILER.

SPECIFICATION forming part of Letters Patent N0. 791,314, dated May 30, 1905.

Application filed July 5, 1904. Serial No. 215,260.

To all whom it may concern:

Be it known that 1, JOHN D. BOWNE, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Water-Tube Steam-Boilers, of which the following is a specification.

My invention relates to water-tube steamboilersthat is to say, it belongs to the general class of steam-generators wherein the Water is subjected to the heat of the furnace while circulating through series of tubes.

Among the numerous boilers possessing the structural. nature stated there are many in which the tubes are disposed substantially in vertical and horizontal attitudes,a nd numerous examples comprise series each having a single perpendicular tube or riser connected to a plurality or horizontal tubes. In this manner many tubes are arranged directly across the path of the hot products of combustion from the furnace and the heating-surface increased so far as may be deemed desirable just where the heat is most effective. The risers are not directly subjected to the'current of the burning gases, and a single riser is made to serve several cross-tubes. Obviously the circulation in the single vertical tube is more rapid than in the several crosstubes, the greater area of the combined horizontal tubes enabling the water to move more slowly, thus giving more time for the heat to of water-tube boiler that my invention par- .ticularly belongs, and the object of the invention is to produce a special arrangement of the tubes that will afford large direct heating-surface for minimum weight and number of tubes.

I accomplish the object set forth by forming and associating the parts as illustrated in the accompanying drawings, of which- Figure 1 represents a front end view or elevation, and Fig. 2 a side View.

Like letters are used to refer to the same parts throughout the drawings.

The base of my invention upon which the various parts are erected and by which the whole structure is supported consists of heavy trunk-pipes A and B, arranged parallel to each site side of the boiler.

other and connected at the rear by a shorter but similar pipe C, the three pipes constituting the three sides of a retangle. A suitable grate is designated by the letter D.

The trunk-pipes A and B are manifolds and each possesses a row of threaded openings into which are screwed the risers E. The series of tubes are arranged one in rear of the other, and assuming the first riser E to be connected with trunk or base manifold B the riser of the next succeeding series will be coupled with trunk or base manifold A on the oppo- As each series of tubes is precisely the same in construction as all the others,.an explanation of the first series will cover any number used. At a suitable distance above the grate D the first riser E will be seen. to engage a T,(marked by letter F.) The T is connected with aseries of horizontal tubes G, the ends of which are connected with each other by return-bend caps H. In Fig. 1 of the drawings the horizontal tubes form a flattened S, but I do not limit myself to three horizontal tubes in each horizontal series, as a greater number of tubes G may clearly be employed. The uppermost tube G of the lower S-shaped series is connected by way of an elbow J and short tube K through an upper T (marked L) and thence by vertical and horizontal tubes M and N with the drum P.

The upper T, (marked L,) it will be noted, is found upon the opposite side from that of the lower T (marked F) of the series of tubes, and a second and upper S-shaped series of horizontal tubes G is connected with the upper T. The lower tuloeG of the upper S- shaped series of horizontal tubes is coupled by way of the elbow Q and a short tube R with the lower T (marked F) and already referred to.

At the rear the drum is connected with the cross-pipe G by the circulation-pipe S, vertically disposed.

In operation the water rises from the side base manifolds A and B, flowing rapidly through the risers E and upper tubes M and N; but relatively slowly through the horizontal tubes Gr, wherein it is exposed to the hot gases from the furnace, heat from which it takes in to the maximum extent. After passing through the drum the water is returned at the rear by Way of circulation-pipe S.

Having thus described my invention, the special arrangement of tubes in a water-tube boiler claimed by me is In a Water-tube steam-boiler, the combination with a steam-drum, of base trunk-pipes,

an upper vertical tube upon one side of the boiler connected with said drum, a lower vertical tube upon the opposite side connected with one of said base-pipes, an upper series of horizontal tubes connected at one end with an intermediate point of said upper ver- 3 JOHN D. BOWNE.

Witnesses:

AUG. T. WILLINK, C. E. Gooems.