US18051A - Improvement in cupola-furnaces - Google Patents

Description

P. W MACKENZ|E.

Cupola Furnace.

ETER

Patented Aug. 25, I857.

UNITED STATES PATE T OFFICE.

PHILIP \I MACKENZIE, OE JERSEY CITY, NEW JERSEY.

IMPROVEMENT IN CUPOLA-FURNACES.

Specification forming part of Letters Patent No. 18.05 I dated August 25, 1857.

To all whom, it may concern.

Be it known that I, PHILIP W. MACKENZIE, of Jersey City, in the county of Hudson and State. of New Jersey. have invented or discovered a new and useful Improvement in Cupolas for Melting Iron, which is also applicable to blast-furnaces; and I do hereby declare that the following is afull, clear, and exact description of the same.

Figure 1 in the annexed drawings, which form a part of this specification, is an elevated cut section. Fig. 2 is a horizontal cut section through the lines Z Z of Fig. 1. Fig. 3 a-horizontal cut section through the lines Y Y of Fig. 1.

Similar letters of reference indicate corresponding parts of the different figures.

Letters A A A in Fig. 2 represent the elongated form of my cupola. a a to represent the inner face of brick-work. The sides are here represented straight, supposing it to be the most economical form; but I propose making them curved or straight, as may be most durable.

b b I) in Figs. 1 and 3 represent the mode of entering the blast into the cupola, as indicated by the arrows, the tuyere-plate c c, which forms top of tuyere, being removed. The short columns (1 d, of fire-brick or any suitable substance, support the tuyere-plate and the brick-work thereon, but are placed, asindicated, back from the inner face of brickwork, so as not to interfere with or obstruct the blast where it enters the fuel at a a, the blast entering the ordinary air-chamber atjj, passing along the chamber f f, and between the columns d d d, as indicated by arrows.

G G, Fig. 1', represent the cupola as being enlarged below the upper part of tuyere h h, thereby increasing its capacity at that point,

and in a great measure reduces the pressure at the tuyere, facilitating the blast in getting under the fuel and reaching the center.

B B, Fig. 2, represent my mode of constructing shells of cupolas, as they are frequently bursting open by the expansion of the brick-work, to obviate which I concave sections of it, as indicated at B B, so that as the bricks expand the shell is drawn from the brick-work at that point, thereby relieving the strain until the shell has become heated and expanded also. This novel arrangement is intended to and does reduce the quantity of fuel consumed as compared with those now in use from twenty to forty per cent., melting .much faster and making hotter iron. These tration to the center, and making every inch of area active melting-surface, and is managed or operated the same as an ordinary cupola.

I do not claim the boshing or outside airchamber; but

WVhat I do claim is- Forming a continuous sheet of air, as indicated at a a, where it is brought in contact with the fuel, in combination with the elongated form and increased size below a a, where the blast enters the fuel.

PHILIP W. MACKENZIE.

Witnesses:

WM. WARD, J OHN B. DRAYTON.

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