USRE7254E - Improvement in hot-air furnaces - Google Patents

Description

UNITED STATEs PATENT OFFICE.

ORANGE N. HART, 0E wrNoN-A, MiNNEsoTA, AssIGNoE To GEORGE T.

r ELINT, or SAME PLAGE.

IMPROVEMENT IN HOTAIR FURNACES.

Specification forming part of Letters Patent No. 92,822, dated July 20,1869; reissue No. 7,254, dated August B, 1876; application iiled June 8, 1876.

To all whom .it may concern:

Be it known that I, ORANGE N. HART, of Winona, in the county of Winona and State of Minnesota,have invented certain new and useful Improvements in Hot-Air Furnaces; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification. f

Figure 1 is a vertical central section from front to rea-r. Fig. 2 is a vertical cross-section on the lines a.' x of Fig. l.

My invention relates to'hot-air furnaces for heating buildings; and consists in the novel construction of the smoke-dues and heatingdrum, and combination thereof with the firechamber, whereby a large and veffective heatradiating surface is obtained; and of the gasburning apparatus, by which it is adapted to burning various kinds of fuel; also, in placing deflectors to direct the air in and among the smoke-fines and in several minor details, all as herein described.

The fire-chamber A is made of any suitable form and size, and is provided with grate a, to which access may be had through door G. The usual draft and door opening into ash-pit O is found at H. Across the tirebox, immediately in the rear of. the grate, I locate a gas-burning device, M, resting on the ledgesd, and along the upper sides of the grate a place lire-plates S, to prevent the case from being burned out, and so as to ad mit the passage of air up behind them. Back ofthe gasburning device I locate removable plates J J', resting on the ledges d, so as to extend from the gas-burner to the back end of the furnace, and divide off from the flre-box A a cold-air chamber, T. This cold-air chamber T is separated from the ash-pit by a vertical plate, l?, and receives air through a pipe, K.

The gas-burner is ofthe form of an inverted V, with its lower side communicating with the cold-air chamber T, and is provided with a fine slit or opening along itsupper edge, as

shown in Fig. l.

At the back end of the fire-box I provide an escape-flue, W, for the passage of the llame and smoke. This ue is usually made increasing in width from the fire-box upward, and its upper end would thus be somewhat wider than the lire-box. In the center of this may be placed the V-shaped diaphragm L, to divide the ascending flames.

The drum Q may be adjusted or attached to the line W at the top and rear of the re-box, and rest upon the fire-chamber in front, and consists of chambers G E at either end, connected by horizontal flues or pipes B B'. In the chamber C the partition or diaphragm D, placed about midway from top to bottom, constitutes the division-strip, to deflect the escaping products oi' combustion into the lower series B of said pipes. The draft therein, iiowing into chamber E at the opposite end of the drum, escapes, by the upper and return dues B', into C above the partition D, and out of the exit-pipe. Asuitable clearout opening for the drum is afforded by the door or other convenient means at U.` The furnace is set in any convenient brick or metal casing, in the usual Way, and the customary attachment of pipes provided to carry heat to different apartments. On the inside of the brick-work, a little below the lower dues B, I secure inwardly-projecting plates R, inclining upward from their outer to their inner edges, as shown in Fig. 2. These plates extend along both sides, and cross the back of the furnace.

'Vhen the furnace is situated where the air is very damp I draw the air to be heated through one or more pipes entering the brickwork, near the floor, from outside the building. When located where the air is sufficiently dry Iform a series of openings through the brick-work near the door, and use air from the surrounding room. Y

When short wood or coal is to be used as fuel the gas-burner is arranged as shown in th-e drawing; but when longer wood is used the burner is moved back, and placed between the plates J and J', the plate J being moved forward against the grate, or, when necessary, (as in using very long wood,) may be placed back of both plates, thus always letting in the cold air just Where the ilame leaves the fuel, it being necessary, when the gas-burner is moved back, to add additional fire-plates S 5 or, if preferred, additional sections of grate-bars may be substituted for the plates in front of the gas-burner When the latter is moved back.

A furnace constructed in this mannerpresents a very large radiating-surface, will burn f i various sizes and kiudsof fuel, and is so arranged that all its parts may be easily'reaehed for Cleaning.

Having thus described my invention, what I claim is- 1. The combination ofdruins C, E, B, and B', having divisionpartition D, and construct# ed and arranged as described, with they fireohamber of a furnace or heater, substantially in the manner and for the purposes set forth.

2. In the furnace A, the adjustable gasy burner M, combined with the fire-box and plates Jr J `and air-duet T, substantially as and for the purposes set forth.I

3; In combination With a drum and furnace,s ubstantalbr as described, the deflectorL, arranged in the exit-flue W, as and for the purposes set forth.

"In testimony that I claim the foregoing I have hereunto set my hand this 15th day of May, 1876.

O. N. HART.

Witnesses: i

R. R. BRIGGs, E. R.' HART.

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