US79390A - Alonzo c - Google Patents

Description

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A. C'. RAN-D.

Coal Stove.

'Patented June 30, 1868.

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Letters Patent No. 79,390, dated June 30, 1868,

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TQ ALL WHOM IT MAY CON CERN:

Be it known that I, AnoNzo C RAND, of the city`, county, and State of New York, have invented certain new and useful Improvements in Stoves, Grates, and Furnaces, for heating purposes; and I hereby declare that the following is a full, 'clear, and exact description thereof.

The object of my invention is to economize fuel, by producing more perfect combustion, and the invention will he found especially advantageous in its adaptation to all furnaces wherein bituminous substances are used. Its principal features are the checking or retarding of combustion, and maintaining only suicient heat in the ire-hox to produce decomposition ofthe fuelLthereby liberating the gases, and then, beforethe combustion of the gases takes place, uniting with them a s'uiiicient amount of air to'make the combustion perfect.

, All who are familiar with the ordinary methods of burning bituminous coals are aware of the fact that a large quantity of unconsumed carbon passes out of the chimney or smoke-stack in black inkes or lamp-blak`; by the use of my invention this difliculty is entirely overcome.v

In the accompanying drawings which form part of this specification-'- Figure 1 represents a side elevation of a stove provided with my improvements.

i Figure 2, a vertical central section of the same. Figure 3, a similar section of-a stove, in whiclra modification of the construction of my improvement .is employed, for the lpurpose of making same more self-acting.

Figure 4, a front view of a grate, showing my improvement inY the form as adapted for grates. Figure 5 is a verticalvsection of the saine. v

Figure 6 is a modification ofthe conel used in my improvements. i

Similar letters of reference indicate corresponding parts in the several figures.

To enable others skilled-in the art to fully comprehend and construct my improvcments, I will proceed to 'describe the construction and-operation of the same.

In the drawings, in figs. 1 and 2, my improvements are shown in-a stove. It will be seen' that the stove may be of ordinary construction, with the exception of the employment of a'cone or perforatedcap, A, to cover the {ire-box. This conc is 'provided with ,two rods, B B, to'which' it is attached, and which project through the cap of the stove, and are provided with notches along their edges, in whichsmall pawls, b take hold, so that the, cone A is suspended. The rodsB B` may be raised or lowered at liberty.

The registering-ring C, between the cone A; and the top of the fuel in the ire-box, and the casing of the stove, is made with a sufficient and corresponding number of airpassages,-D D D D, through it and the casing of the stove, so that allthe required amount of air necessary for the complete combustion 'of the inflammable. gases escaping from the top of the fuel is supplied through said passages D D.

In crder to provide a more perfect regulation of the supply of' air furnished through the ash-pitand firegrate, I employ a registering-slide, E, on each side of the easing of the ash-pit, and prefer to have no airpassage formed in the frontl part ofthe drawer. A

When the stove is to be put in operation, the cone A is raised, to admit of throwing the coal in the stove, and the cone, after the fire is lighted, is` then lowered towards the coals,so that inflammable gases are, to some extent, retained under the cap A, and are supplied and mixed through the register@ with air. The mixed gases and air are finally drawn through the perforations :v :u ofthe corre A, and are brought to a mo'st complete com. buston by being ignited vabove the cone. The object in 'having the conc or deilector adjustable, or else thev fire-box adjustable, is that a-certain relative ,distance between the fuel and deiieetor should be maintained'in order'to insure perfect combustion above the detlector or cone. I

Instead of using a vc'oue,-A, with a number of .perfor-ations, n: az, Ait is preferable in certain cases to have one or more slots through the same,'-as vshown in iig. 6. Instead ofr attaching the cone to the rods B B, the same may be hinged, as shown at ain iig. so as'to admit of its being raised for charging the fire-box, which may be made self-regulating towards the cone, on thc principle of a. spring-scale, by making the fire-box so as vto slide freely in the stove up or down, and resting upon the end of a balance-lever, c, Vwhich has its fulcrum d fixed on the side of the ash-pit, and the other end of which projects to the outside of the ash-pit, where it is detained and counterbalanced with a spring, g, against the weight of the fuel and fire-box resting upon the otherend of the same, so that the re-box and topsnrfaee ot' the fuel keep always the sameirelative distance from the cone A over it.

When my improvements are'used in grates, I change the construction to the'form shown in figs. 4 and 5, in which-I provide a rectangular box, L, wherein the fuel is placed. The bottom of this box is provided with grate-bars and a registering-slide, z', to regulate the supply of air through the grate-bars. To the top part of this box h, I hinge the cone k, of which the form corresponds with the box h, and has, instead of perforations, a. longitudinal slot in its top end; it has also a registering-slide, m, on its 4front part, whereby the extra. supply of air is furnished and mixed with the gases from the fuel. The grate constructed thus with my improvements3 will furnish not only heat, but also light.

The importance of these improvements used in furnaces for soft coals may be clearly seen from the feregoing, and the object attained has been sought for many years.

Having fully described my invention, what I claim therein, and desire to'secure by Letters Patent, is-

1. In stoves, grates, or furnaces, the cone A, when used alone, or'in combination with the air-passages D D, or an equivalent device-or means of retaining, supplying, or mixing air with the inflammable gases before final combustion ofthe fuel takes place in such stoves, grates, or furnaces, substantially as herein described and for the purposes herein set forth.

2. In combination with the cone A 'and passages D D, the slide or slides B and E, for` regulating the admission of air, the decomposition of the fuel, and consequent production of gas according to the amount of heat required, substantially as herein described.

A. C. RAND.

Witnesses R. BOEKLEN, CARLOS PIERCE.

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