US23509A - Cooking-bange - Google Patents

Description

2 Sheets-Sheet 2. H. H. STIMPSON.

Cooking Range. No. 23,509. y Patented April 5, 1859.

f and useful UNITED STATES PATENT OFFIOE.

H. H. STIMISON, OF BOSTON, MASSACHUSETTS.

COOKING-RANGE.

Specification forming part of Letters Patent No. 23,509-, dated April' 5, 1859; Ressued May 1, 1860, No. 956.

To all whom it may concern:

Be it known that I, H. H. STIMPsoN, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new Improvements in Cooking Ranges, and that the following description, taken in connection with the accompanying drawings, hereinafter referred to, forms a full and exact specification of the same,l

.vherein I have set forth the nature and principles of my said improvements, by which my invention may be distinguished from all others of a similar class, together with such parts as I claim and desire to have secured to me by Letters Patent.

The gures of the accompanying plates of drawings represent my improvements.

In Plate l, Figure l is a longitudinal vertical section taken through the fire-chamber, &c. Fig. 2, Plate 2, is a transverse horizontal section taken in the plane of the line A, B, Fig. l. Fig. 8, Plate 2, is a transverse vertical section taken in the plane of the line C, D, Fig. l, Plate l. Fig. Il, Plate 2, is a transverse vertical section taken in t-he plane of the line E, F, Fig. l, Plate 2. Figs. and G, Plate 2, are views in detail to be hereinafter referred to.

My improvements are made upon a cooking-range in which the ovens are heat-ed by three separate and distinct flues, the side iues heating the front portion thereof and the central flue the remainder, which is the principle embodied in the patent granted to me bearing date the 17th day of May 18414.

My first improvement consists in so arranging the central or main flue that the heat, &c., from the re chamber shall pass out of the same at a considerable distance below its top, instead of allowing it as by the ordinary construction of ranges to impinge directly upon the top plate of the fire chamber or that which covers it, and which is the cause of their being rapidly burned out or warped. By thus conducting the heat away at so low a point in the lirechamber, the preservation of the top plate is insured as the injurious effect of the heat upon it is prevented. This improvement also prevents the admission of cold air to the oven flues, as any cold air admitted, must necessarily, passing through the burning fuel, become heated before entering the main or central flue. The saving of fuel by this arrangement will be obvious, the

' amount required to heat the ovens as I have practically demonstrated, being reduced at least one-third.

My second improvement consists in an arrangement of devices by which the expan sion and contraction of the grate is prevented from injuriously affecting the remaining portions of the range, or stove, by throwing or pushing them apart which has heretofore, by the ordinary construction of stove and range grates, been unavoidable. I effect this result by making the grate considerably narrower than the fireechamber and forming flanges or projections upon the side plates of the boiler chambers, which overlap the spaces left between the ends of the grates and the sides of the boiler chambers, the grate being loosely hung so as to allow its free expansion and contraction.

My third improvement consists in the use of sliding covers to the boiler apertures, which are arranged so as to slide back and forth without being removed from the range. The ordinary circular covers heretofore used have proved very objectionable as they are constantly liable to be dropped and broken, and those intended for the boiler apertures and cast thin for that purpose are frequently placed over the tire-chamber instead of the ones intended therefor, and in consequence are soon burned out and destroyed. By my improvementthese objections are obviated, as the covers can not be removed from the range, and thus cannot be broken by being dropped while there is no possibility of their being placed in other than their proper localities.

Having thus stated the general features of my invention I will now proceed to describe its construction in detail.

a a in the drawings represents the lirechamber and Z the boiler chambers. At the back of the lire chamber a a is hung a short partition plate c o in such a manner as to leave a narrow space between it and the main flue d cl, so that the communication of the flue al (l with the fire-chamber is necessarily below the bottom of the partition plate c o. By this arrangement the heated currents, &c., from the lire-chamber are pree vented from ascending against and burning out or otherwise injuring the top plate e, e of the fire chamber, as they are made to escape at a considerable distance below the same, viz.; under the bottom of the partition plate c c. The heat, &c., after entering the main flue l CZ ascends as shown by red arrows in the drawings, and diffuses itselt` about the [lues of two elevated ovens ff-g g being made to pass more particularly to the back of the ovens, by means of partitions 7L it, and finally passes out of the chimneylue z' c'.

The lateral lues receive the heated currents from the tire-chamber through openings 7c L and conduct'them, as shown by blue arrows in the drawings, up the inclined Flues Z, Z whence they are made to pass around the front parts of the ovens by partitions m m. and thence out the chimney i'lues z' t' as will be readily seen by inspection of the drawings. The shutting otf or opening the communication betweenV the fire-chamber and the ovens is regulated by proper valves or dampers in such a manner as to conduct the heat about the ovens by either the lateral tlues or the main lues, or by all at once as may be desirable.

n n is the grate hung loosely upon pivots 0 0, which enter corresponding holes formed in the side plates ofthe boiler chambers. The grate, as will be seen by Plate 2 is made much narrower than the space between the boiler chambers, and rests against iianges or projections 79, j) attachedto the side plates of the boiler chambers and ill up the spaces between them and the grate and thus prevent the fuel from falling out, or air from going in. By this arrangement the eXpan sion and contraction of the grate cannot push apart the other portions of the range or otherwise injuriously affect them. rI he advantage of this result will be apparent to manufacturers ot ranges &c., as the eXpansion and the contraction of the grate and the consequent deterioration of the adjacent parts has proved a serious annoyance.

Instead of the circular covers heretofore used for the boiler apertures, and the disadvantages of which from breaking and burning out, &c., are well known and apparent7 I use sliding covers g, g, g which slide in proper grooves or ways i", r, formed in the top plate, and can be pushed under the ovens into a space s s formed to receive them. Ey this means the boiler apertures can be rapidly and readily covered and uncovered without danger otibreaking, or possibility of dropping them, or placed in other than their proper relative positions. The central sliding cover Q is placed in a sliding plate t, so that the whole ire chamber can be uncovered tor boiling purposes, Src.4

Having thus stated myimprovements shall state my claim as follows:

What l claim as iny'invention and desire to have secured to me by Letters Patent is,

1. The combination of the flanges or projections attached to the side plates of the boiler chambers with the grate constructed so as to admit air to the fuel from below and hung so vas to allow of its tree play, and made narrower than thel iirechamber as described, whereby the contraction and eX- pansion of the grate is prevented from injuriously aiecting the remaining portions of the range or stove.

2. The use of the .sliding covers g g in combination with the top plate arranged to operate substantially as described.

JOSEPH GAvnTr, JAMES H. CLAPP.

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