US41323A - Improvement in steam-boilers - Google Patents

Description

UNITED STATES PATENTNOFFICE.

ROBERT E. ROGERS AND JAMES BLACK, OF PHILADELPHIA, PENN SYVAIA.

IMPROVEMENT IN STEAM-BOILERS.

Specification forming part of Letters Patent No. 41,323, dated January 19, 1864.

To @ZZ whom it may concern:

Beit known that we, ROBERT E. ROGERS and J AMES BLACK, both of Philadelphia, Pennsylvania, have invented an Improvement in Steam-Boilers; and we do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Ourinvention consists of a steam-boiler, constructed as describedhereinafter, with the view of obtaining an extended heatin g-surtace, a free circulation of water within the boiler, facilities for rapidly raising the steam and maintaining it at an uniform pressure by the use of a comparatively small amount of fuel, the boiler being at the same time simple in construction,

of a form to insure strength, readily secured in its proper position within the {ire-chamber, and easily repaired.

In order to enable others skilled in the construction of steam-boilers to make our invention, we will now proceed to describe its coustruction and operation.

On reference to the accompanying drawings, which form a part of this specication, Fig. 1 is a vertical section of our improved steamboiler, and Fig. 2 a sectional plan on the line 1 2, Fig. 1.

A is the body of the boiler, and consists of a hollow vertical cylinder, rounded at the opposite ends.

B B are a series of tubes arranged round the body of the boiler and at a short distance from the same, each tube being bent at both ends and the bent ends being secured to the body A. Between the tubes B a series of similar, but shorter tubes, B', are arranged round the body of the boiler and secured to the same. By connecting the upper ends of the tubes B to the boiler at points above those where the tubes B are secured, and by adopting the same plan with the lower ends of the tubes, the piercing of the body of the boiler at points too near each other is avoided, and a great number of tubes are obtained without wounding the boiler.

More tubes than are shown in the drawings might be used. Thus a tube might be secured to the boiler, the upper end at the point x, and the lower end at the point x', and similar tubes secured at corresponding points might be carried round the boiler and secured to the same without diminishing from its strengthin fact, the number of the tubes employed must depend in a great measure upon the length and diameter of the body ot' the boiler. v

The boiler with its tubes is shown in the present instance as being secured near the top by means of brackets E to the interior of the cylindrical casing D, which has a conical top, F, terminating in thc smoke-pipe or chimney G.

The casing D is secured to the base H, in which are the grate-bars I, the latter separating the ash-pit J from the fuel-chamber K, both of which are furnished with suitable doors.

It will be evident that the boiler may be suspended within the casing by a variety of appliances-as, for instance, to the conical top by Vsuitable links at the lines y, or to the corner of the casing by links at the lines mand the boiler may be connected laterally to the casing by light stays. 1n all cases, however, the boiler must be dependent as far as possible for its position within the casing on supports connected to the boiler at or near the top of the same, the body of the boiler being otherwise unsupported and being suspended within the casing, so that its entire surface may be uncovered and exposed to the action of the'products of combustion.

The casing D may be composed of brickwork, and the fuel-chamber and ash-pit inclosed by brick-work; but itshould be understood that the interior of the casing must in all cases have direct and open communication with the fuel chamberin fact, the latter and the interior of the casing may be considered as one general fire-chamber, within which `the boiler is suspended.

The tubes B and B maybe vertical, although we prefer to arrange them in the spiral or inclined position shown, as they tend to direct the products of combustion in a spiral course to the chimney, and to thereby increase their heating action on the boiler.

The advantages of our improved boiler may be enumerated as follows: First, the tubes which are exposed to the direct action of the products of combustion greatly increase the heatingsurface 5 secondly, the tubes afford a medium for the unif'orm and much desired circulation of water within the boiler; thirdly, by suspending the boiler within a tire-chamber and leaving its entire surface exposed to the products of combustion, the steam can be raised with great rapidity and maintained at ar uniform pressure by the use of a comparatively small amount ot' fuel; and fourthly,

We claim as our invention and desire to secure by Letters Patent- 1. rlhe body A of the boiler having; tubes B and B', so arranged that they will maintain a continuous circulation of Water between the upper and lower portion of the boiler, when the whole or very nearly the Whole of the boiler is suspended within a casing containing the re chamber, and is exposed to the direct action of the products of combustion7 asset forth.

2. rlwo or more sets of tubes, B and B', arranged on and attached to the body A of' the bwiler as set forth, for the purpose set forth.

In testimony whereot` we have signed our names t0 this specification in the presence of two subscribing witnesses.

R. E. ROGERS. JAMES BLACK. Witnesses:

DAVID BEITLER, SAML. P. JoNEs.

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