US712690A - Hot-air stove. - Google Patents

Description

Patented Nov. 4, I902. D. LAMOND.

HOT AIR STOVE.

(Application filed Dec. 80, 1901.)

2 Sheets-Sheet I.

(No Model.)

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HOT AIR STOVE.

(Application filed. Dec. 30, 1901.) (No Model.) 2 Sheets-Sheet 2.

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UNITED STATES PATENT OFFICE.

DAVID LAMOND, OE PITTSBURG, PENNSYLVANIA.

HOT-Al R STOVE.

SPECIFICATION formingpart of Letters Eatent No. 712,690, dated November 4, 1902.

Application filed December 30, 1901- Serial No. 87,735. (No model.)

To all whmn it may concern:

Be it known that I, DAVID LAMOND, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Hot-Air Stoves, of which improvement the following is a specification.

My invention relates particularly to the construction of the partition-walls which divide the lattice brickwork and combustion-flue in hot-air stoves. I

The object of my invention is to provide a structure that will remain intact, or, in other words, preserve its form for an indefinite period regardless of the expansion and contrac-, tion occasioned therein by variations of term perature. With this object in View I have in the accompanying drawings illustrated a stove embodying my improvements, where- 111 Figure 1 is a longitudinal sectional view of a stove of the above-described character,sh0wing my improvements. Fig. 2 is an enlarged sectional view of the same, more fully disclosing said structure.

Referring to said views for adescription in detail, the numeral 1 designates the outer cylindrical wall of said stove, and 2 the combustion-flue thereof. In this case the combustion-flue 2 presents, sectionally, a convexed appearance, one side thereof being formed by a wall A, composed of a series of built-up layers of bricks 3, arranged radially from B to O, the opposite wall D being composed of built-up layers of bricks 4, radially arrranged in reverse direction. The said wall D is reinforced at its rear by a structural wall E, extending from F to G, presenting a practically straight surface excepting for the offsets 5 and 6, formed therein. Diametrically across the stove and at right angles from the said wall E and engaging into a radial wall D at the opposite side of the stove from H to I is formed a divisional-wall structure J. From the ends of said wall E at F and G are formed the structural walls K and L, which walls have formed thereon the ofisets 7 and 8 as they recede toward said wall D.

Grooves are formed within all surface-walls except those of the combustion-fine for the reception of. the lattice-brickwork 9, which lattice -work forms the main vertical passages 10.

The vertical passages extending from H to I, wherein the short lattice-brick are em- .it is impossible for said wall D to collapse, as

said wall may be said from its structure to possess all the qualities of a keystone, resisting Whatever strain may be placed thereupon by expansion in the lattice-work.

I am aware that others have employed lattics-work in furnace structure with grooves in the walls to receive the lattice-brick connectin g therewith and division-walls therein; but they differ in structure from that herein illustrated and claimed.

What I claim as new, and desire to secure by Letters Patent, is-

1. In ahot-air stove, alattice-work, a covering for the rear lattice-work flues and a combustion-flue having sectionally a convexed form, one side of which forms, a divisional wall between the flue and the lattice-work.

2. In a hot-air stove, a lattice-work, a flue having a wall concaved on the flue side and straight on the lattice-work side and a covering 11, over the rear lattice-work fines.

3. In a hot-air stove, a lattice-work, a combustion-fiue having sectionally a convexed form, one side of which forms a divisional wall between the flue and the lattice-work, a covering for the rear lattice-work lines and a wall J dividing the lattice-work.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

DAVID LAMOND. In presence of- D.'D. LAMOND, FRED. O. HENZI.

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