US12758A - chane - Google Patents

Description

To allwhom it may concern: i Be it known thatwe, J ONATHAN'J OHNSON and J OHN E. CRAN of Lowell, in the county gof Middlesex and Stateof Massachusetts, I haveyinventedcertainnew and useful Imf x provements in Stovesand other Heating Apj ,paratuses and we do hereby declare that the j following is afull, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specificatiom in whichi n Figure 1, isja plan or top view of a stove constructedaccordingto our improved mode. Fig.2, isxa vertical Section of ditto, the plane "ofsection beingfthrough the center. Fig. 3, qis anelevation of ditto. Fig. 4, is a section of the cold airpassage, valve, evaporator, and a portion ofthe air heating passage, the plane of section being at rightangles with it-he planeof section oflFig. 2. n i r Similar letters of reference indicate correi f spending part-sin the several figures.

i The nature of our jinvention consists, 1st, inplacing a valve between the cold air and 'airheating passages for thepurpose aswill behereafter shown. i v i .1 Our inventionvconsistsin the employment of a valve in combination witha bridge ar- Jranged as will be hereafter fully shown and described. f i 11 y 1 Toenableothers skilled in the art to fully g proceedto describe it. i A representstheoutercasing of a stove similar to those inuse. y

"B lS the fire grate; f n

C is the ash pit. 1 r i i i i Dfiisthe hearth andj E are legs secured to i 1 the hearth to support the stove.

f Wh lCh is suppliedwithya suitable quantity ofwater, the drawer being in fact a water tank,see G, Figs; 23 and 4, and at the upper part of theback end of this tank a pipe F is attached, said pipe communicating with the tank Gr. ThepipeFis intendedgto convey cold airfromthe outside of the building 1 floor, or be arranged in a n n n y convenient way thatwill answer thepurpose.

At the end of this pipe where 1t enters the n opens inward, the upper ed e ofjthe valve [having a' joint or hinge attac ment, see Flg.

nderstand and construct our invent-ion we Underneath the hearthD there is adrawer doors and windows. or other place to the inside of the water tank, throw or carryheated air down into the cold and said.pipemay be placed beneath the tanlrG, thereis placed a valve H which f iS pecifi c ation of Letters lateht No. 12,758, dated April 24,1855.

tank G may be constructed with a double bottom leaving a space K between as shown 1n F1gs.2 and 4.

L is an internal air heating passage ex- .tending upward from the water tank G beneath the hearth D, through the hearth,,the ash pit C, fire grate B,'and through the body of the stove said passage L communicating 1 .J. JOHNSONANDJQELCRANE; or LOWELL,:MassAoIiUsE'rTs.

with the external air at the top of the stove. n

The fire chamber it willbe seen in consequence of the passage L is of annular form,

and may be supplied with fuel through openwith the openings M. Or instead of the above the usual fire door may be employed. R represents the smoke pipe or the fianch on which the smoke pipe is fitted.

The cold air passes through the pipe F into the tank G, said air opening the valve H, as indicated by the arrow in Fig. 4. The air is thereby moistened for the water in the tank is warmed by the heat from the stove and is gradually evaporating and consequently moistens the air. The air passes up the central passage L and becomes thor oughly heated as it passes out at its top. New in case of a counter current of air passing down the passage L the valve H will be closed thereby and the counter current will be prevented from passingthrough the cold air pipe F, and the bridge I prevent-s the air from getting under the valve and forcing it open, by means of this bridge the counter current must act upon the valve so as to close it.

The counter currents are extremely dangerous in using ordinary air heatin furnaces, and they frequently occur owing to the low temperature of the air in the room caused frequently by the opening of the The counter currents air passage and the heated air often ignites wood work below and fires the building. Our invention prevents any danger ofthis kind. The water tank also will receive any cindersorscales that. may fall from the in- ;nerside of the passage L, and thus danger resulting from that cause ispreventedr y We do not claim the central air heating in the manner described, for the purpose passage L separately for that has been prespecified.

viously used, but JONATHAN JOHNSON.

What We do claim as new and desire to se- JOHN E. CRANE. 5 cure by Letters Patent is Witnesses:

We claim the employment of the valve H A. E. BEACH,

in combination with the bridge J arranged WILLIAM TUSCH.

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