US318902A - Abel p - Google Patents

Description

(No Model.)

A. P. EOLOOMB.

STEAM GENERATOR.

No. 318,902. Patented May 26, 1885.

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ABEL P. HOLCOMB, OF SILVER CREEK, NE\V YORK.

STEANl-GENERATQR.

forming par: of Letters Patent No. 318,902, dated May 26, 1885.

Application filed May 22, 1852.

To aZZ whom it may concern.-

Be it known that I, ABEL P. Honoonn, of Silver Creek, in the county of Chautauqua and State of New York, have invented new and useful Improvements in Steam-Generators, of which the following is a specification.

This invention relates to an improvement in that class of steam-generators which are designed for producing steam under a low pressure for warming buildings and similar purposes. Steam-generators of this class are, to a certain extent, objectionable, because the hot gases or products of combustion must leave the generator at a higher temperature than the temperature of the steam which is generated, which results in a corresponding loss of heat.

The object of my invention is to utilize, as far as possible, the heat which is contained in the hot gases or products of combustion after they have left the generator; and my invention consists to that end of a water-heater of improved construction arranged in the exit-- passage of the products of combustion, as will be hereinafter fully set forth, and pointed out in the claim.

In the accompanying drawings, Figure 1 represents a sectional elevation of a steamgenerator provided with my improvement. Fig. 2 is a horizontal section in line as m, Fig. 1.

Like letters of reference refer to like parts in both figures.

A represents a steam-generator of any suitable and well-known construction, that shown in the drawings being a generator for which Letters Patent of the United States, No. 231,320, were granted to me August- 17, 1880.

B represents the fire'pot of the steanrgen erator; G, the ash-pit; 1), the fuel-magazine; E, the waterspace; F, the outer casing, and G the pipe or passage through which the hot gases or products of combustion escape from the generator.

H represents a pipe through which the products of combustion are conducted to the chimney or Smokestack.

I represents an enlarged chamber connect ing the passage G with the pipe H.

K represents a coil of pipe or any other suitable water-heater having a large heating surface, which is arranged in the chamber 1, through which the hot gases pass, and which (X0 model.)

receives or absorbs a large portion of the heat which is contained in these gases.

As shown in the drawings, the waterheater K consists of a vertical annular head, L, having a. central opening, Z, and arranged at the upper end of the heater, :1. similar annular head, M, having a central opening, an, and arranged horizontally at the lower end of the heater, and elbow-pipes N, which are secured with their upper ends to the vertical head L, and with the lower ends to the horizontal head M. The heads L M serve to establish communication between all the pipes N at their ends. The heads L M are made smaller in diameter than the chamber 1, so as to form an annular opening between each head and the surrounding casing for the passage of the hot gases.

- 0 represents a radiator of any suitable and wellknown construction, which has its upper end connected by a flow-pipe, p, with the upper head, L, of the water-heater; and q represents a return-pipe, which connects the lower end of the radiator with the lower head, M, of the water-heater.

R represents a water-supply pipe, which communicates with the returnpipe (1, and which serves to keep the water-heater, radiator, and connecting pipes filled with water, and which permits the expansion of the water as it becomes heated.

S represents a damper arranged at the lower end of thechamber I, near its junction with the pipe H, for regulating the draft through said chamber; and T represents a pipe which connects the pipe H with the ashpit O, and which is provided with a damper, t, which latter can be opened when the grate is shaken, for the purpose of permitting the dust to escape into the chimney through the pipes T and H.

The hot gases or products of combustion which escape from the generator through the opening G pass through and around the upper head, L, of the water-heater, thence along the upper horizontalbranches of the pipes N, thence downward along the vertical branches of the pipes N, and finally through and around the head M andinto the pipe H. The water contained in the heater K absorbs heat from the hot gases, and moves through the heater in a direction opposite to that in which the gases move through the chamber I, and escape finally from the heater at the hottest point thereof through the flow-pipe p, which conducts the hot water to the radiator O. In the latter the water parts with its heat, and as it becomes cool it returns through the pipe 9 to the lowest and coolest point of the heater K. In this manner a constant circulation of water is maintained through these parts, and a large portion of the heat contained in the hot gases is utilized for heating purposes, and a considerable saving of fuel is thereby efiected. The conduit through which the hot gases pass to the smoke-flue is preferably lined with fire-brick, or is otherwise protected, to prevent radiation of the heat.

The steam generated in the generator A is

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