US473268A - Furnace - Google Patents

Description

(No Model.)

W. SLOAN.

. FURNACE.

Patented Apr..19,'1892.

UNTTED STATES PATENT OFFICE.

W'ESLEY SLOAN, OF PEORIA, ILLINOIS.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 473,268, dated April 19, 1892.

Application filed December 30, 1891. Serial No. 416,559. (No model.)

To all whom it may concern:

Be it known that I, IVESLEY SLOAN, a citizen of the United States, residing at Peoria, in the county of Peoria and State of Illinois, have invented certain new and useful Improvements in Furnaces; and -I do hereby declare the following to be afull, clear, and eX- act description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in furnaces.

The object of the invention is to provide a furnace in which the cold air may be drawn through a pipe passing into and up through the fire-pot, and thus the air in the said pipe may be heated by a part of the heat which is generally wasted in passing out of the smokeflue.

In the drawings hereto annexed, Figure 1 represents a vertical section of the furnace; and Fig. 2 represents a sectional plan View of the furnace through dotted line a: 00, Fig. l.

A represents the fire-pot, which may be arched at the top, as shown, and in the top of which is cut an opening, into which is set a pipe B. This pipe extends downward for some distance at about half-way, then turns at right angles to the vertical portion thereof, and passes out through the side or back of of the furnace into the open air outside of the building in which the furnace may be placed.

A shell C surrounds the furnace proper (or fire-pot) and also the top thereof. This shell drops down to near the bottom of fire-pot, which is generally the hottest part of the said fire-pot. Now an outer casing D, usually used with furnaces of this character, surrounds the whole and in the top of which are the usual heat-conduit pipes G. The openings of the fire-pot and ash-pit are shown by the letters E and F, respectively.

The smoke-flue is shown by H, and I I represent stays to secure the shell 0 in place.

A draft of air is formed from the rooms above the furnace through the pipes G and through the spaces between the shells D and O and fire-pot A and the pipe B. The cold air enters the pipe B immediately over the fire and is drawn out of the said pipe and is carried down between the fire-pot and the easing 0 and surrounds the hottest part of said fire-pot and thence passes up between the outer casing D and the said casing O to the pipes G and into the rooms to be heated.

I claim 1. In a hot-air furnace, the fire-pot A, having the cold-air duct placed therein admitting air from below and delivering it at the top of said fire-pot, in combination with the intermediate shell O, dropping to a position near the bottom of fire-pot, and the outer shell D,

substantially as herein set forth and described.

2. In a hot-air furnace, a cold-air duct B, entering at the side or back of furnace and fire-pot and delivering air at the top of firepot, in combination with the outer casing D and the intermediate casing O, placed between the said fire-pot and said outer casing D, said casing O dropping to a point near the bottom of fire-pot, for the purposes herein set forth and described.

In testimonywhereof I affix my signature in presence of two witnesses.

WESLEY SLOAN. WVitnesses:

E. R. CLAYTON, A. KEITHLEY.

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