US109679A - Improvement in agricultural caldrons - Google Patents

Description

scribed out. sind anni didn,

EEENEZER E. situ AND yAtouzo H; BENNETT, or ROCHESTER, NEW

l YORK: f

Letters Patent No. 109,679, dated November 29, 1870.

iMPRovEMENT in AGmcuLTuRAL cALpRoNs'.

The Schedule referred to ln these Letters Patent and making part of the same.

Nature of the Invention.

This invention consists in the construction of the furnace, whereby a double air-space with a compound circulation is attained; also inthe construction of the ealdron and steamer proper, as hereinafter del Gen-eral .Descrption.

In the drawing- Figure 1 is a central vertical section;

Figure 2, an elevation of the caldron and -stcamcr proper, removed from the furnace.

Figure 3, a fragment .of the outside ofthe furnace, showing the Ventilating holes. i

represents the furnace, which is simplya vertical'cyliuder, made of cast or sheet metal.

It has the ordinary fire-pot B and grate E at the bottom, and is made open at the top, toy admit the caldi-on and steamer, whose fiange,.a, rests on top.

The furnace is constructed with two air-spaces, b

- and c, the outer one being located between the outer cylinder and -au intermediate metallic lining, D, and the inner one located between the said intcrn'iediate lining and the fire-brick or stares of the fire-pot B.

Both these air-spaces are angular', and the outer one of greater extent than the inner one, caused by carrying the intermediate lining l) up half way or more of thc height of the combined caldron and steamer.

Holes l d and f, respectively at the bottom and top of the space l), are made through the outer walls of the t'uruaccinto space l); and similar holes, d cl'f, are made through the intermediate lining into the inner air-space c, as clearly shown in gs. l and By this means a compound circulation of the cold air is insured, viz.:

First, from the outside into thc bottoni, and through the top of the outer space; and

Second, from thc space l to space c into and through This construction ofthe furnace, whereby the double air-spaces wit-h the compound circulation are attained forms the first feature of our invention.

By this inea-ns not only the fire-pot, but also the intei-mediate lining and the outer cylinder, are protected against burning out under the intense heat. l

another advantageis that when the fire becomes low, the air-spaces b c surrounding the fire-pot have a tendency to keep it warm, and toY preserve it, from exposure to the cold outer air, thus insuring a more uniform and suiiiciently high temperature.

rlhe caldron and steamer proper are constructed in two parts.

First, an outer shell, G, of proper form, to rest inside the furnace; and

Second, the caldron O', which rests in the shell, being made of sufciently smaller size to leave a jacket-space, 71., which forms the water and steam-space for the steamer. 4

'lhe caldron may he made of any desired form, but has a raised rim Aor bead, lf, at the top, for the attachment o f' the pipes; and also a depressedjacket or leg m at the bottom, which extends down into the fire-space below the caldron, and aiords an extra capacity for the gcnerationof steam.

The front side of this jacket is made open, as shown at 1), for the purpose of allowing the feeding in of fuel through the furnace-door. l rj his special construction of the caldron and steamer constitutes the second feature of our invention.

rlhe open-topped caldron allows free use without the necessity ot' removing acovering-dme; while the jacket-space, which retains a body of water, allows the generation of'steani sufficient for the steaming of vegetables and food for animals, and for` other' purposes.

rlhe jacket or leg an, extending down into the firespace, not only furnishes an extra large lire-surface, but it also, by reason et' its concave form, retains the dame and heat against atoe rapid lescape to the exitilu'e, and thereby extracts the maximum amount ot' heat rlhis form also serves to hold the gases at that point nearest the tire, whereby. they become burned to a greater degree than if allowcdto rise direct, in which oase a large portion would escape, for the reason that it would escape at once above4 the temperature suicicnt to burn it.

Ono or more pipes, H, lead from the top of the rim or bead la, to conduct the steam to the steaming reccptaclc.

A stcampipe,1, also'extends to a suitable feedf water apparatus outside the oaldron, to equalize the back pressure produced by the steam through the feedwater pipe K, which also connects the jacket-space, at the bottom, with the feed-water apparatus.

Furthermore, a safety-valve, L, is used on top, to let off steam under undue pressur i XVe are aware that air-spaces are common in various kinds of furnaces and stoves; W'e do not claim such broadly.

Clem/ns.l Wha-t we claim, and desire to secure by Letters Pateut isll. The arrangement in the furnace A of the two airfspaces b and c, separated by the intermediate lining D, the outer space heilig of greater extent than the-inner one, und the two lmvnga. compound eircu- 'lation of air, by means of the passages d fl j' und d' il' j", the whole operating-inthe manner, and for the' purpose specified. Y

2. The shell C, constructed of such shape as to lit the open-topped furnace, and provided with the depending Ieg m, forming ai water-space below the eeldron, and having the opening p in front, in the; manner, and for the purpose specified.

3. The combination of the open-topped caldi-on C andjaeket C', formed as herein described, the said parts being-nrrzmged with the jacket-space h between the walls, and with the depending.)r leg m, forming :in extra water-space below the caldi-on', :is-herein described.

In witness whereof'7 we have hereunto signed 'our names in the presence of two subscribing witnesses.

EBENEZER,` E. SILL. ALONZO H. BENNETT.

fitnessesz JAS. E, GHENEY, J r., G. WLLLM MIATT.

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