US139505A - Improvement in hot-air furnaces - Google Patents

Description

UNITED STATES WILLIAM O. GROVER, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN HOT-AIR FURNACES.

Specification forming part of Letters Patent No. 139,505, dated June 3, 1873;'ap'pl1cation filed l February 14, 1873.

. To all whom it may concern:

Be it known that I, WILLIAM O. GROW/ER, of Boston, in the county of Suiolk and State of Massachusetts, have invented'an Improved Hot-Air Furnace; and I do hereby'declare` l With radiator pipes and dome through Which the flames and smoke pass, the cold air being admitted into the chamber formed by the brickwork and surrounding such structure, and being heated by contact with the radiating surfaces and being disseminated or distributed through suitable hot-air pipes to the rooms -to be heated. Not only are these castiron plates themselves more or less pervious to passage ofcarbonic-acid gas directly through them, but the joints between therespective parts are always more or less imperfect, and, notwithstandiugall possible precaution, deleterious gas escapes and mingling with the hot air is thrown into the looms to the injury of all persons who may breathe the air thus contaminated. My invention is designed not only to obviate these objections, but to furnish a construction in which the lire-pot, ash-pit, and grate may be readily dismembered and access had to the smoke and iiame chamber. For this purpose I make the furnace in two entirely separate and distinct parts, there being rst a lire-pot and ash-pit (relatively separable) and next a large chamber, in the front part of which the lire-pot is placed, the tirepot opening at top directly into the chamber, and it and the ash-pit into door-spaces in the front Wall of the chamber, while thevvalls of the large smoke and llame chamber surround the lire-pot, and are many times larger, the chamber having a suitable flue-outlet, and the air to support combustion being introduced through suitable registers in the doors of the chamber. The Walls of this chamber are formed of rolled or plate iron tightly riveted together, (as boiler plates are riveted,) and have no openings of any kind except the escape-due and the ash-pit and fire-pot openings. This tight box or chamber is to be placed in the compartment in which the air t0 be heated and distributed is contained, or around it may be built a brick-Work chamberof capacityl tight except at the flue and door openings and entirely surrounding the lire-pot, said tire-pot opening at top directlyinto the large llame and smoke chamber andstanding upon the ash-pit plates, the fire-pot plates and ash-pit plates being readily dismembered and being, preferably, removable through the door-ways of the main chamber for access to the general interior of the chamber. y .i

The drawing represents a furnace embodying my construction. Y

Figure l denotes a horizontal section taken above the lire-pot. Fig. 2` `is a front View.` Fig. 3 shows the interior of` the.` furnace-chamber and the fire-pot inclosed by it.

c denotes a large chamber-space formed by six Wall plates or sides, bc d e f g. b c denote the top and bottom plates, d e the front and rear plates, and fg the side plates. Extending from the front plate d are shown plates i h forming the door-Way to the ire-pot,and plates i forming the door-Way to the ash-pit, as Well as plates k, which form the outlet-Hue for escape of the volatile products of combustion, all of these plates h z' k, as well as the main plates, being formed of plate iron secured together by riveted joints made i'mpery vious to passage of gaseous matters. On the bottom plate c is placed a cast-iron ash-pit frame, l, and upon this frame stands a fire-pot frame, m, which may be 4surrnounted by a guard, n. The ash-pit frame is open at front and the opening leads directly from the ash-pit door-Way, at the front of which is the door o. The tire-pot frame m opens at the front into the door-way, at the front of which is the re-pot door p. In each of these doors a register, q, is placed for controlling admission of air into or through the tire-pot, and in the ash-pit frame may be placed a slide damper controlling air-passages s leading from the ash-pit directly into the chamber a. The fire-pot and ash-pit frames m t are made detachable, and may stand :in place Without special bolting; and the grate may be hung by gudgeons at'its rear end so asv to tip to the front for discharging the fire-pot. The fire-pot occupies the position seen in the drawing, and vis entirely surrounded by the close and tight box u, into which the flames and volatile products of combustion are forced by the draft that maintains combustion, and from which after hea-tin g the main plates such products of combustion escape through the iue. By making a large-size tire-pot andv urging combustion by the draft (properly regulating the escape) all the upright and top snrfaces of the main plates Will be heated, thus making a very 1arge radiating surface for Warming a correspondinglyr large amount of cold air introduced into an air-chamber of which the Walls of the chamber form the infound impossible to practically heat by furnaces of ordinary construction.

Instead of making the case ct with a bottom plate, c, forming a iixed part of the structure, it may be made of the other plates bd cfg, the bottom edges of the plates d cfg being embedded in a cement or other suitable bottom or door. In the chamber a deector, 1', may be suspended over the fire-pot to deflect and aid in circulating the flames and other direct products of combustion arising from the fire-pot.

I claim- The air-tight chamber, composed of the metal plates riveted together7 and having Within it the removable lire-pot and ash-pit plates, the Whole being constructed and arranged substantially as shown and described.

' W. 0. GROVER.

Vitnesses:

FRANcIs GOULD, M. W. Fno'rHrNGHAM.

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