US367988A - Michael mahony - Google Patents

Description

(No Model.)

' M. MAHONY.

BOILER.

Patented Aug. 9, 1887.

Wiln'esae-sv I fizvenlon' y 1mm N. PETERS. Phuln-Lithizgnphnr, wmmmmgi'u shell B,a continuous body extending all around with my invention.

, UNIT D STATES PATENT OFFICE.

MICHAEL MAHONY, or TROY, NEW YORK.

BOILER.

SPECIFICATIONfor ming part of Letters Patent No. 367,988, dated August 9, 1887.

I Application filed May 26, 1887. Serial No. 239,412. (No model.)

.T 0 all whom, it may concern.-

Be it-known that I, 1VIIGHAEL MAHoNY, a citizen of the United States, residing at Troy, in the county of Bensselaer and State'of New York, have invented certain new and useful Improvements in \Vater-Boilers, of whichthe following is a speeification,reference being had therein to the aceompanyingdrawings.

This invention has relation to water-boilers, more particularly tothat class that are made of cast-iron, for heating dwellings and other buildings; and the objects of my invention are to provide a water-boiler for such purposes in which the water will circulate rapidly,and will be constructed of as few pieces as possible to prevent the danger of leaks at the joints, and by reducing the time necessary for its construction will diminish its expense. I accomplish these objects by the construction illustrated in the accompanying drawings, in which Figure 1 is a perspective View, partly in section, of a boiler constructed in accordance.

Fig. 2 is a vertical section of the same on line at x of Fig. 3. Fig. 3 is a horizontal section on line :1; y of Fig. 2.

In said drawings, A represents the outer shell,and B the inner shell,ofthe boiler. These parts are supported by the base-plate O,forming the top of the ash-pit D, the walls of which support the grate D. Projecting from the surface of the base-plate there is a vertical flange, c, that surrounds the lower end of the shell of the boiler and maintains it in proper position. taiued about an inch and a half or two inches apart to form awater leg or chamber,surrounding the lower end of the inner shell and the fire-chamber B of the boiler. Above said fire-chamber the inner shell is provided with a series of radial hollow ribs, 1), having a closed bottom extending vertically over the fire-chamber. These ribs form,with the inner the central vertical flue, B retained between the closed inner ends, if, of the ribs; and within said flue is placed the magazine H, of suitable diameter, so that its surface is within The two shells of the boiler are re an inch of the inner end of the ribs. Between each rib a large vertical flue, b, is produced for the ascent of the products of combustion against the sides of the ribs and the inner surface of the shell B. The flues I) lead the products of combustion into the contracted passage between a collar, b, extending upward from the inner ends, b, of the ribs and maga-' zine H, and thence under a hood, G, extending over the top of the magazine, and from said hood they are conducted in any direction through a flue, 9, attached to said hood. The magazine can be suspended either from said hood or by means of lateral projections resting upon the top of the collar 1)". By having the inner shell of the'boiler and all its radial ribs formed in one piece or body the number of joints in the construction of the boiler is reduced to a minimum, there being only two. The lower joint is rendered steam-tight by forming an annular rib, to, around the bottom of the shell A, on the inner side thereof, and

an annular rib, If", on the outside of the inner shell. The latter rib is cylindrically turned, so as to substantially fit within the rib a, and has a circular groove, I)", cut in it to reeeivea suitable cement well packed therein to form a water-tight joint at that point. The edge of the outer shell, at the top thereof, is also cylindrically turned to substantially fit around the collar b", and has cut therein a circular groove, 6, to also receive some pacliingcement and form a water-tight joint at that point. The steam or hot water produced in the boiler is carried off by means of two pipes, f, issuing vertically from the top of the boiler, close to the rear of the magazine-hood. They are united, if desired,at their upper ends by means of a horizontal pipe, f carrying at the middle of its length a vertical pipe, f". In the side of the boiler opposite its fire-chamber is placed a door, A through which the fire may be kindled and observed. I

To regulate the draft,the ash-pit is provided with a door, D having hinges (Z at the top thereof, and to retain said door at any desired angle or its opening of suitable size there is hinged to the side of the ash-pit, or to the side of the door-frame at 7:, a curved rack, K, havradial hollow ribs andaeollar projecting above IO ing its teeth 7c adapted to receive a latch-finsaid ribs, substantially as and for the purpose ger, d, projecting from one edge of the door. described.

Having now fully described my invention, In testimony whereof I affix my signature in 5 I claimpresence of two witnesses.

The combination of a base-plate, an outer MICHAEL lslAIIONY. shell having an inner annular rib at the bot- W'itnesses: tom, and a cast-iron inner shell consisting of a GEO. B. LAWRENCE,

continuous cylindrical body havinga series of XVM. P. CANTWELL, J r.

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