US8050A - gbannis - Google Patents

Description

C. W. GRANNIS.

Cooking Stove.

Paftented April 22, 1851.

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q, a womaswom 1Specificatiorro LettersIEatent .-1\To.183150,,datedAPriLZQ, 1851L---.- Q

To all whomzft may ooncemi n 1 I Be it known that LGHAR Es .LFGRANNIS, of Gowanda, in the county of Erierand State of .New York; haveyinventednew and 5 useful l1 "Improvements in Gooking Stoves,

and that th'e following is a full,:c 1ear,= and exact description of. theiprinciple or cliaracter thereof :awhich Jdistinguishesrthenr ifromL all other thingsubefore known,1-:and of the. manner of making, constructing, and usingir the same,referencje' being had to the accompanying drawings, making part of; this specification, in which r l Figure 1 is a plan; Fig. 2, a longitudinal vertical section; Fig. 3, a horizontal section taken at the line (A a) of Fig. 2; and Figs. 4

5 and 6, cross vertical sections taken at the lines (B 72) 5C 0) and (D d) of Fig. 1.

. The same etters indicate like parts in all the figures.

In my improved stove the products of combustion pass up from the fire chamber under the kettle or pots, and thence around the elevated oven, while a current of hearth and fire back passes into and through the oven.

The first art of my invention consists in arranging ues into which air is to be adin the corner of the bottom plate, the said flues being arranged between two fire flues which conduct the products of combustion from the fire chamber to flues surrounding the elevated oven, so that the air on its way to the oven shall be heated along its whole passage, the said air-flues retaining the same or nearly the same capacity along their entire length to prevent the air pass 4Q. ing to the oven from losing its sensible heat by expansion, for it will be obvious that if the hot air flues opened directly into an enlarged chamber under the oven bottom, as in other stoves heretofore made, it would expand and thus lose its sensible heat, before entering the oven, but by my improvement I not only heat the air more effectually but it enters the oven before losing its sensible heat and will therefore be more eflicient in baking. And the second part of my invention consists in combining with the air heating chambers in the fire back a flue or flues which pass out from near the bottom of the fire chamber, so that the air in the said chambershall be heated on one side by l the fire in the fire chamber and by theprod:

heated air from a hot-air chamber under the mitted to pass into the oven through holes boiler holes and one on each side of the hot fluesatthetbackthereof.

i #In the accompa'nyingdrawings .1(:a) repre-ixzr sents the fire chamberl'ofamy improved stove,; and (6-) the hearth platesawith a chamber'e (0) it below it divided into two compartments by a longitudinal vertical partition (dim Cold air is *admittedzto each ofx-these compartments: throughcholes". (e *6) win: lthet bot;- E tom, and as itqis 'heated by radiatiomiitwqis made tdcirculatemrider the hearth plate byte passing from" each hole outwardtaroundrthe end of two lateral l'partitions (f f) i then stoe; ward the middle, around the ends 'of two 0 other partitions (g 9), then outward around the ends of a third set of partitions (h h) and then inward and up two shortvertical flues and thence into two chambers (j 5') formed back of the fire back (71:), these 5 two chambers being separated by a vertical partition (1). These chambers are provided with lateral partitions (m m), (n n) and (o, 0), similar to those in the chambers below the hearth plate and for the same purpose; but in addition to the heated air which enters the chambers from the chambers under the hearth, cold air is introduced into them from the rooms through ucts rofr combustion in =passing ethrough the. o F

holes p p) in the bottom plate (g) of the g5 stove. The heated air in these chambers passes out from the top of the chambers (j j) into a horizontal flue (r) in the top of the stove and between the two ranges of boiler holes (8, s, s, s) and between the two main fire flues, and it is delivered through two holes (25, 27,) in the bottom plate of theoven (u) and under a second plate ('0) which constitutes the baking bottom of the oven. This latter plate does not, however, extend the whole length of the oven, a space being left at each end and near the oven doors for the passage of the heated air, which after circulating through the oven escapes through a hole (:12) in the top plate of the oven to the fire flue above the oven. The products of the combustion pass out from the top of the fire place, over the fire back into two horizontal flues (y, y,.) under the air flue (r) and thence pass around the elevated oven to the exit pipe (2), a damper (a) being placed near the exit pipevto govern the discharge of the products of combustion, so that when this is closed they shall pass around the oven, and when open pass directly out without heating the oven.

In addition to the flues just described ing additional heat to the-air in its passage through the hot air chambers at the back,

.qwhich but for these fiues would be kept comparatively cool by the exposure of the outer plate thereof to the cold air of the room.

The number of lateral partitions in the hot air chambers can be increased or diminished' at pleasure, but the number described and represented are deemed the best.

What I claim as my invention and desire to secure by Letters Patent is .1. vThe arrangement of the fines which conduct the heated air to the space under the oven bottom from which it is discharged into the oven at the corners thereof and without any enlargement to permit the expansion of the air, before it reaches the oven as" described when this is combined with the arrangement of fire flues on each side thereof, as described, .whereby the air passing to the oven is heated along the whole distance of itspassage by the products of combustion fromthe fire place as described.

2. I also claim as my invention the heating of the air in its passage through the back hotair chambers by'combining with such airchambers and the main-fire flues, the branch fire flues which pass back of the said air chambers, substantially as de-.

scribed.

CHAS. WFGRANNIS. Witnesses R. MoLERrrH, I-I. SHATTUCK.

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