US404561A - Warm-air furnace - Google Patents

Description

(No Model.)

2 Sheets-Sheet 1.

B. P. REYNOLDS.

WARM AIR FURNACE.

No. 404,561. Patented June 4, 1889.

2 Sheets-Sheet 2.

(No Model.)

B. P. REYNOLDS.

WARM AIR FURNACE.

Patented June 4, 1889.

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UNITED STATES PATENT QFFICE.

KENJAMIN F. REYNOLDS, OF CHICAGO, ILLINOIS.

WARM-A IRFURNACE.

SPECIFICATION forming part of Letters Patent No. 404,561, dated June 4, 1889. Application filed December 26, 1888. Serial No. 294,651. (No modeL) To all whom it may concern:

Beit known that I, BENJAMIN F. REYNOLDS, a citizen of the United States, residing at Chicago, in the county of Cook andSt-ate of Illinois, have invented a new and useful Improvement in WVarm-Air Furnaces, of which the following is a specification.

My invention relates to improvements in furnaces forwarming air; and my object is to provide such a furnace, formed of steel-plate and of improved construction, which shall atford to it great advantage over other furnaces in the way of strength and durability, which shall be comparatively simple and economical in its construction, present a large amount of heating-surface within a comparatively small space, and utilize in a high degree the calorific power of the fuel, and which shall, furthermore, render the internal details of the furnace easily accessible for the purpose of cleaning or of renewing parts.

To this end my invention consists in the general construction of my improved furnace; and itfurther consists in details of construction and combinations of parts.

In the drawings, Figure 1 is a View in side elevation of. my improved furnace with one side of the outer casing removed to disclose the internal parts which surround the radiator; Fig. 2, a View in sectional elevation through the .center of the furnace; Fig. 3, a section taken on the line 3 3 of Fig. 2, and viewed in the direction of the arrows; and Figs. 4 and 5, broken sectional views showing details of construction.

The furnace comprises, generally stated, a rectangular outer shell or casing A, a radiator B, of similar form, within the casing, and a fire-pot C, with ash-pit C, also rectangular, within the radiator, a space for the passage of hot products of combustion intervening, so far as practicable, 011 all sides between the parts 0 O and the radiator, and a similar but much larger space for the passage of air being left between the radiator and casing A. The parts A B and O O constitute, respectively, separable portions of the furnace loosely supported one inside the other-that is, without being secured together in any manner to interfere with the taking apart of the furnace for any purpose, such as its removal.

The casing A, which is preferably of sheet in etalas galvanized iron-is formed in three sections A, A and A The sections A and A are joined together at w in the manner most clearly illustrated in Fig. 5viz., by a I strap 25, which surrounds the casing A, and is provided with a tongue t, to fit a groove in a parallel strap 75 on the inside of the casing, the two straps being secured together at intervals by nut-bolts 25 The edges of the sections A and A abut against the opposite sides of the tongue I." and are clamped between the two straps by the tightening of the bolt 25 as shown. The upper edge of the section A is provided with re-enforcing strips 8 s, riveted together through the casing, as most clearly illustrated in Fig. 6, while the top section A is flanged at its edge to fit the inner side of and rest upon the strip 5.

The sections A and A are provided with openings for the various flues and air-passages which communicate with the internal parts of the furnace and with feed and ashpit openings, which are closed by doors in the usual manner. The section or top A is provided with openings surrounded by collars o for the warm-air pipes, and with a waterpan, preferably in the form of a pipe o,pr0- vided with perforations on its upper side.

I form the radiator B of steel plates riveted together, and chutes r g, which lead, respectively, to the fire-pot and ash-pit, are riveted in place upon the radiator. On the under side of the radiator is an indirect-draft smoke-flue 19, also riveted to the radiator and communicating toward one end with the interior of the latter through a passage 19', and at its,outer end the flue is provided with a door p The smoke-flue p is rectangular in form to permit it to fit snugly against the radiator, and facilitate the securing of it to the latter by riveting, and its form renders it much easier to clean out than round flues. Toward the top of the radiator is a directdraft smoke-flue 0, also riveted to the radiator, and communicating with an upright smoke-flue a, which communicates at its lower end with the flue p, as shown;

All the connections and various parts of the radiator are riveted wherever joined, as described, to afford gas-tight seams, which prevent the escape of any of the products of combustion, except through the smoke-fines,

and render the radiator exceptionally strong and durable.

At the vertical corners of the radiator 13, and secured thereto, are plates or flanges n, which extend radially to the inside corners of the casing A, and a are zigzag flanges riveted at their edges to the radiator and to the corner flanges n, as shown, to project across the space intervening between the sides of the radiator and the adjacent sides of the easingA. This construction causes the air to become thoroughly mixed as it rises up the sides of the radiator, and as each flange is heated from the radiator the air comes into contact with an extensive area of heatingsurfaee. The corner flanges n obviate the nccessit-y of bending the flanges n around the corners of the radiator, and render the construction more simple and durable and less expensive than if the flanges n were not employed.

The fire-pot C and ash-pit O are in one piece, and preferably of cast-iron, the firepot comprising a rectangular skeleton frame inclosing lire-brick m m, which rests upon a flange I at the top of the ash-pit. The corner bricks m have concave faces, which thus round the corners of the lining of the firepot, and both the fire-bricks m and m being of standard size and shape the difficulty and cost of replacing them when worn out is much less than would be brick of special size and construction, as generally required in. other furnaces. The ash-pit 0 is a solid wall which supports the lire-pot, and is itself mounted upon legs I, to afford a passage for air underneath between the bottom of the ashpit and that of the radiator. The lower edges of the ash-pit wall are flanged inwardly to afford rests P for the edges of a removable plate 7;, which constitutes the bottom. of the ash-pit.

In the operation of my improved construction of furnace the hot products of combustion may be caused to escape through the direct-draft flue o, as in starting the fire, or, the damper 0' in the line 0 being closed, the pro ducts are caused to escape through the indirect-draft flue 1') at the bottom of the. radiator. In the latter case the hot products of combustion pass down the four sides of the fire-pot and ash-pit, between them and. the radiator, and into the flue 1) through. the passage p. In this manner the hot products, coming in contact with the entire inner surface of the radiator, impartheat to the latter.

throughout all its parts. As the products of combustion are carried over the sides of the fire-pot, heavier particles fall to the bottom of the radiator or are drawn into the flue 7). When it is desired to clean the bottom of the radiator, this may be readily accomplished through the ash-pit door on raising the re movable plate 7a \Vhat I claim as new, and desire to secure by Letters Patent, is-

1. In a rectangular warm-air furnace, the combination, with the radiator, tire-pot, and ash-pit, of a casin A, comprising sections A and A joined at adjacent edges by a strap "6, having a tongue I. extending between the sections, a strap t having a groove to receive the tongue t, and nut-bolts 1'5, securing the strips together, and a top section A, supported on a re-enforcing strip 5-, secured to the section A substantially as described.

2. In a rectangular Warm-air furnace, the combination, with the casing, lire-pot, and ash-pit, of a rectangular radiator ll comprising metal plates riveted together, having riveted thereto chutes 9 (1, n indirect line 7'), a flue o, radial corner flanges n, and intermediate zigzag flanges a, substantially as described.

BENJAMIN I1. REYNOLDS.

in presence of LoUr ilrrnn, .I. \V. 'I)vnnnmtrriit.

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