USRE6139E - Improvement in cooking-stoves - Google Patents

Description

, a higher level than thc'top of the fire-box.

UNITED STATES PATENT OFFICE.

GEORGE N. PALMER, OF ELMIRA, NEW YORK.

IMPROVEMENT I N COOKING-STOVES.

Specification forming part of Letters Patent No. 150,781, dated May 12, 1874; reissue No. 6,139, dated November 17, 1874; application flied Juiy 23, 1874.

To all whom it may concern:

Be it known that I, GEORGE N PALMER, of Elmira, in the county of Ohemung and State of New York, have invented a new and useful Improvement in (looking-Stoves, of which the following is a specification:

My invention relates to the class known as step-stoves in which the top of the oven is on My improvements consist, first, in locating the top of the fire-box at or near the midheight of the oven and combining with the said oven iiues, surrounding the same, and provided with independent dampers, one regulating the upward draft at the front of the oven, and the other the draft downward around the back of the oven, the said dampers being located at points remote from that at which the products of combustion from the re-box come in contact with the front plate of the oven. The object of this part of my invention is to utilize the full heating effect of the products of combustion immediately on leaving the fire-box, and cause them to impart heat as uniformly as possible to the various parts of theoven.

My improvements relate, secondly, to the construction of the damper which regulates the upward or direct drafts, said damper being perforated and provided with a register, which permits sufficient circulation to prevent the formation of a dead-chamber, and the consequent escape o f gas from the upper iiues, while it enables the throwing of nearly all the products of combustion into the lower circu- 1 lation beneath the oven, when required.

My improvements relate, thirdly, to the combination of the dampers, as hereinafter described.

My improvements relate, fourthly, to the combination, with a fire-box and oven-fines, arranged in manner substantially as first in dicated, of a register, adapted to admit eX- ternal air to the oven-fines in order to regulate the draft without subjecting the incandescent fuel to the direct action of cold air.

The accompanying drawing is a vertical longitudinal section of a stove illustrating my invention.

A represents the oven of the stove; B, the front flue thereof; B1, the top flue, B27 the bottom ilue 5 and B3, the rear or back flue. These flues are connected completely around the oven, and all extend laterally'the entire width of the stove, having no divisions or partitions such as are usually employed with divin g-ilues. C represents the iire box or chamber, the grate of which may be at or near the level of the bottom flue B2, while the ash-pit extends to av lower level, as represented. These relative .positions of grate, ashfpit, and bottom flue are not, however, essential to my invention. The top of the ire-box is located, as shown, at or near the midheight of the front flue B, so that the gaseous products of combustion immediately on leaving the dre-box are brought in contact with the central part ofthe main ovenplate, striking the said plate nearly at right angles to its surface, which causes them to be diffused uniformly over the surface of the plate, and permits their easy and free deflection and separation in an upward and downward direction, a part going to the upper flue B1 and a part to the lower flue B2, in proportions regulated by dampers presently to be described.

a represents an inclined grating to prevent the falling of coal into the front flue B. D is the top plate ofthe front portion ofthe stove. D is the top plate of the rear portion. E is the discharge iiue or pipe. In the upper iiue B1, in front of, and in close proximity to, the discharge-pipe E, is a perforated hinged da mper, b, extending the entire width of the iue, and provided with a slide or register, d, for opening and closing the perforations in the damper, so as to regulate the passage of the gases through the front portion of the upper flue, or to admit of nearly closing such passage when required. The hinging of the damper enables it to belet down, when required, so as to leave the iiue B entirely unobstructed when a direct draft is required.

When the damper is elevated as shown in the drawing I am enabled, by means of the slide or register d, to cause an equal passage of gases above and below the oven, or to regulate the relative flow above and below, as may be desirable.

f is a sliding damper, by'which the top of the rear iiue B3 may be closed when required, leaving the entire draft ofthe stove under the control of the damper b and register d, and of a coldair register, m, which is located, as shown, in the front plate of the ue B above the top D of the fire-box, and serves to check the draft when required without the necessity of confining the gases, and also without eX- posing the incandescent fuel to the effect of cold air.

This device enables me to keep the fuel in a state of lively incandescence, while its cornbustion may be checked to any desirable eX- tent, and for any necessary period. H represents a hood partially covering the top plate D, and serving to confine vapors or gases, so as to cause them to be carried through the register m into the fines.

It will be noticed that my stove is of' class known as thel step-stove; also, that theflues B Bl B2 B3 extend lthe entire width of the stove, and have no divisions as diving-flue stoves; also, that this stove, in the relative positions of the oven, the fire-box, and the fines, possesses all the advantages, while avoiding the disadvantages, of diving-flue stoves; also, that, by means of the dampers b and f, the products of combustion can be thrown at will either all above or below, or equally divided above and below the oven.

The close proximity of the oven to the firebox enables ali economical use of coal; also, the direct application of the products of combustion to the oven, and the superior draft of` the stove, enable the employment of a slower and lower state of combustion.

The damper m allows a check on the fire, and at the same time gives no chance for escape of the noxious gases; and also the position of the damper prevents the cold air from striking on top of the burning surface, and so obviates the blackening which takes place in case of a lid beingiraised.

The direct application of heat enables the effective heating of' the oven without so high a state of combustion of the fuel.

Diffusion of heat renders the heating uniform, and prevents it from becoming excessive at any point.

lThe following is claimed as new:

1. The combination ofthe following elements, to wit: The oven A, surrounded With ues B Bl B2 B3 extending from side to side Without interruption, the fire-box C located, as shown, and delivering its gases at about the midheight of the oven, the independent dampers b and f, the former having a register, d, to accurately graduate the draft through the direct flue and the dischargedue E, al1 constructed and operating as specified.

2. The combination of the fire-box C, the dues B B1, the registered damper b d for accurately graduating the draft through said ilues, and the register m for permitting an active draft through the ues B B1 Without causing a draft through the fire, al1 substantially as specified.

3. The hinged perforated damper b, provided With the slide d, and arranged in the top flue B1, for the purpose of more thoroughly regulatin gthe amount of heat in its passage around the oven, substantially as herein set forth.

GEORGE N. PALMER. Witnesses:

J. It. REID, Oo'rAvIUs KNIGHT.

Images