US528409A - Denis ahern - Google Patents

Description

(No Model.)

D. AHERN.

. STEAM 13011.55. No. 528,409;

Patented Oct. 30, 1894.

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` DENIS AHERN, F

`ATENT Trios.

NEW YORK, N. Y.

STEAM-BOILER.

SPECIFICATION-forming part of Letters Patent No. 528,409, dated October 30, 1894:.v

l Application led May 2, 1894.. Serial No. 509,859. (No model.)

To al? whom t may concern:

Be 1t known that I, DENIS AHERN, a citizen of the United States, residing in the city and county of New York, in the State of New York, have invented a certain new and useful Imiprovement in and Relating to Steam-Boilers, of which the following is a specification.

For serving in steam vessels, I arrange two 0r more of my boilers extending fore and aft on opposite sides of the center line of the vessel, and fire each from a suicient space left between. My boilers are peculiarly adapted to serve in such situations. They may also be used with advantage for general purposes.

I adopt in part a construction which has Y been tried and much approved. Eachboiler 1s composed of a main body of rectangular cross-section, traversed by two series of tubes at right angles to each other. The body is set partiallydiamond-wise,and is equipped with a water-leg extending downward from the lower angle, which latter is tied with efficient internal braces or gussets. The furnace is on one side, the front side of this water-leg. The hot products of combustion rise through one inclined set of pipes, descend in a sufficient chamber on the side opposite to the Iire and pass into the up-take through the tubes which are inclined in the opposite direction. A cylindrical drum extends horizontally near the upperangle of thebody, with liberal connections. I provide removable means for stopping the flow of the hot gases through the space between the body and the drum. I prof vide a liberal connection to the stack so as to present the nearly spent heat to one side of. the steam-drum. The arrangement insures a just sufficient heat in theupper portion of the apparatus to dry the steam Without injuring the metal. The water-leg is set inclined, which arrangementincreases the provision for grate area.

The front of the boiler is composed of tubes and headers so connected to the boiler that there shall be an active circulation through the whole.

The accompanying drawings form a part of this specification and represent what I consider the best means of carrying out the invention.

Figure 1 is a transverse vertical section through one boiler with a portion of the vessel. This figure shows also the line of the front of a similar boiler, which it will be understood is placed in the reversed position on the otherside of the hull. Fig. 2 is an elevation of the boiler shown in Fig. l. The portion of this figure at the right shows the exterior of the front. The middle portion shows the front plates removed. 'lhe left portion shows the boiler with still more of the front work removed.

Similar letters of reference indicate corresponding parts in both the figures where they appear.

A is the main body of the boiler, of rectangular cross-section, the proportion being about one and one-half(1) to one (l). It may be of any required length.

A is a Water-leg extending downward from the lower angle at an inclination, as shown.

A2 are specially strong stays tying the parts together at the junction of the water-leg with the boiler, butleaving liberal passages for the descent of water and the ascent of steam.

B and C are the two sets of tubes, the first set, B, connecting the broadest faces; the second and longer set, C, connecting the shorter faces of the body.

' In steam-vessels I mount my boiler in pairs, each boiler presenting its face inward toward the center line of the vessel, the opposite angle, which I will call the back or outer side, being presented'toward the side M of the vessel. The body is set with its longer faces at an angle of about thirty (30) degrees from the horizontal. This carries the inclined water-leg so far to the backside or outside that it gives a very liberal space for the lire-grate.

D is a horizontal drum set a little above the upper angle, and communicating with the body by liberal connections D. The side angles of the body are 'strengthened by gussets a3.

The grate E may extend the wholelength of the boiler, and the Vconstruction allows it to be of liberal area. s

G, G, are horizontal thin strips or plates of iron, having the form of cross-section represented, connected by bolts G and nuts G2. They prevent the passage of the hot gases IDO throtigh the space between the boiler A and the drum D, while allowing of easy removal to facilitate the construction and repairs.

The boiler front is inclined, as shown, and composed of horizontal tubes H, connecting with headers Il', H2, the latter being provided with liberal connections to the body and to the leg to insure that the water in the boiler is allowed to circulate through these tubes.

I are removable panels. These may be double or triple sheet iron, with air spaces between to retard the conduction of heat. They are secured at the bottom by bolts I and rest at their upper edges against a ledge D2. There arebolts coniinin g these upper edges also removably. An efficient non-conducting casing .I extends downward at the rear at a proper distance from the short lower rear face of the boiler. The spaces inclosed between the boiler body and the panels I and the casing .I lead the hot gases downward after their delivery from the tubes B, and allow them to rise through the tubes C into the up-take.

K is 'the stack, and K', K', a widening of the base thereof extending longitudinally of the boiler. A removable sheet or panel K2 completes the inclosure of this face of the boiler. The stack K, with its extensions K and sheet K2, is secured by bolts L to the boiler front, and by bolts L2 engaging with the ledge D2 on the drum D.

It will be understood that there may be any or all of the ordinary accompaniments of a boiler, as a safety-valve, water gages, and provisions for feeding and nonconduct ing clothing outside of the front and of the several other surfaces, arranged in any ordinary or suitable manner. It will be understood that the pipes H and headers I-I are properly covered, and the spaces between are filled with earthy or non-conducting material, and the whole properly faced to make a tight and eflicient boiler front.

The weight of the boiler may be largely supported on the only moderately inclined water-leg. The lower portion of this latter extends below the grate and serves as an efficient mud-drum, with provisions for blowing out or otherwise cleaning at intervals. Extensions A4 A4, from the outer angle connect the boiler to the adjacent parts and aid in their mutual support while allowing a liberal space betwen these extensions for the hot gases to descend.

I attach importance to the inclination of the front of the boiler, because it contributes to the effect induced by the inclination of the water-leg A inthe opposite direction,-to in-V crease the area available for the fire-grate. The horizontal water pipes H in the front, and the provisions for circulating water there through, add materially to the heating surface, and consequently to the efficiency of the boiler. Y

The front of the base panel K2 of the stack can be detached by disconnecting two lines of bolts as shown to allow of access to the front ends of the tubes C without disturbing the stack. i

Similarly the rear panel, I, can be removed by disconnecting the two lines of bolts to allow access to the back ends of the tubes B.

Modifications may be made without departing from the principle or sacrificing the advantages of the invention. `I can vary the relative proportions and the inclinations ofthe sides of the body. The boiler may serve with the cross-section of the body square, and mounted exactly diamondwise, the lower angle being directly under the upper. I prefer the whole as shown. Y

I claim as my invention l. In a steam boiler having a rectangular body A of oblong cross-section, set horizontal longitudinally and inclined transversely, an inclined water-leg A', extending continuously along the length of the boiler, in combination with the grate E extended rearward beyond the center line of the body, and with the inclined furnace front having horizontal tubes H and headers H connected to the body A, all arranged forjoint operation substantially as herein specified.

2. In a steam boiler having a rectangular body A and a separating drum D extended horizontally a little above the upper angle, with connections D therefrom to the body, a removable strip G and holding means G', G2, adapted to prevent the flow of gases forward at the top, and to be easily displaced when required, all substantially as herein specified.

3. In a steam boiler having a rectangular body A, set oblique or inclined transversely and traversed by two sets of tubes B and C at right angles each to the other, the inclosing casing, the upper portion of which is composed of the removable panels I, K2, adapted to be removed to allow access to the tube ends for examination or repairs without disturbing the other parts, and the drum D, and the stack K supported on such drum independently of such casing, all substantially as herein specified.

4. The boiler body A, set inclined transversely with the grate under one oblique face, two sets of tubes inclined in opposite directions, the provisions for the iow of gases downward past the rear angle of the body and upward again through the tubes (J, and the stack K leading upward from the top chamber at the front and the removable panels I and K2, all arranged in the hull M of a vessel, and adapted to serve substantially as herein s'pecited.

In testimony that I claim the invention above set forth I affix my signature in presence of two witnesses.

DENIS AHERN.

Vitnesses:

CHARLES R. SEARLE, M. F. BOYLE.

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