
    Hailes v. Van Wormer.
    . 1. -Á new combination, if it,produees new and useful results, is patentable, though all the constituents of the-combination were well lcnpwn and in common fuse before the combination was made. But the results must ,;bé a product of the combination, and not a mere aggregate of several results, each the comnlete product of one of the combined elements.
    
      2 . Merely bringing old devices into juxtaposition, and there allowing each to work out its own effect without the production of something novel, is not invention.
    3. No one, by bringing together several old devices without producing a now and useful result, the joint product of the elements of the combination) and something more than an aggregate of old results', can acquire a right to prevent others from using the same devices, either singly or in other ■ combinations, or, even if a now and useful result is obtained, can prevent others from using some of the devices, omitting others, in combination.
    Appeal from the Circuit Court for the Northern District of Now York.
    Ilailes & Treadwell, manufacturers of.stoves, filed a bill in the court below against-Van'Wormer et ah, engaged in the same business, to enjoin these last from making a certain sort of coal-stoves called “ base-burning,” “ self-feeding,” or “reservoir” stoves. These stoves are so called because they have a magazine or reservoir susponded ahove the fire-pot, which may be filled with coal at its upper extremity. This, when filled, is closed'by a cover. The lower end of the reservoir or feeder is left open, and, as the coal in the fire-pot is consumed, that in the reservoir falls and supplies the place of that consumed, the combustion being only in the fire-pot, and not in the reservoir. Every reader, on looking at. the diagrams on pages 355, 856 and 357, will recognize the sort of stove referred to.
    The value of this sort of stove, which had been in large Use in this country for some time, was not a matter of question. But persons were not all agreed as to what was the most economical and otherwise the roost advantageous mode of embodying the principle which made the distinguishing characteristic, of the stoves.
    The bill was founded on two letters-patent; one reissued patent, granted to the complainants, February 3d, 1863, for an •"improvement in stoves,” the original patent having been granted to Ilailes & Treadwell, as inventors, May 7th, 1861; the oilier, a patent granted to-one Mead and Hailes, assignees of Ilailes & Treadwell, as inventors, August 11th, 1863, for au “improvement-in coal stoves;” the interest of Mead in
    
      
      
    
    Big. 1. — Base-burning Stove.
    
      
      
    
    She. 2. — Base-turning Stove without the casing.
    
      
      
    
    Pig. 3. — Vertical section of Base-burning Stove.
    
      which patent had become vested in the complainant Tread-well.
    The specification of the reissue of February 3d, 1863, said:
    “Our experience in this class of stoves” (base-burning or reservoir stoves) “is, that the-most beneficial effects are to be secured from an organization which does not pass the products of combustion lip, around, and over the top of the coal-supply reservoir, So as to heat a surrounding jacket thereof, but heats a circulating or ascending body of air by moans of radiated heat from the fire-pot, and at the same time heats the base of the stove by means of direct heat, circulating through descending flues which load into the ash-pit, or around it, and to the smoko and draft flue; also, that the greatest economy, considering the increased benefit secured from supplying coal continuouslj’- out of a reservoir, is attained with an arrangement which holds the superincumbent body of coal in suspension, such arrangement being a reservoir with a contracted discharge extending slightly down into a flaring or enlarged fire-pot, around or above the whole upper edge of which, outside of the contracted discharge of the coal-supply reservoir,-the flame is allowed to circulate, and, therefore, caused to descend and circulate around or under the base portion of tlio stove,, in its passage to the smoko and draft flue.
    The effect of the first-named pilan is to husband the radiated heat aud use it for the purpose of warming the uppier part of the stove and the room in which it is situated, as well as for heating air for warming rooms above, if desirable, and at the same time to so confine the direct fire-heat and keep it in contact with the base portion of -the stove a sufficient length of time as to insure the warming of the same to a comfortable degree.
    “The effect of the second plan is to relieve the incandescent coal from the weight of the body of superincumbent coal, and thus obviate a compression of the incandescent coal in the fire-pot, and secure for the flame a free oxpiansion in a lively and brilliant -manner, and thus enable it to act with, great boating effect upon tho lower piortion of the stove in its passage to the smoke and draft flue.
    “With the view of organizing a stove or heater which operates on the base-bunpng or coal-supply reservoir principle, and at the same time embraces ihe two plans of operation above referred to, we have devised the following plan of construction:
    
      “A is a base of our stove, constructed with a chamber B, which extends around and beneath the top plate of the said base. In this chamber air may be admitted through'the front passage A. Upon the top-plate of the base A is erected a support C, for horizontal grate D, and a fire-pot B, as shown. The support forms a chamber below the grate, and out of the front of the support
    Fig. 4.
    
      
    
    Pm. 5.
    
      
    
    a portion of metal is removed as at b, so that air to the fire on the grate may have free access when the ordinary regulator or damper is open. In order to insure the passage of the air to the fire only from below the grate, a cut-off, c, extends out from the upper front part of the support C, and rests upon the two lateral stops d, which extend out from the front of the support, as shown. ■ The top plate of the base, at points outside of the support C, is perforated with three apertures, F, F1, F2, which communicate with the chamber B. The apertures F1, F2, have vertical pipes F3, F4, placed in or around them,.while the- aperture -F has the draft and smoke pipe or fltie F5 placed .in or around it, as shown, The pipes F3, F4, extend up to the upper rim of ‘ the fire'-pot E, and connect to .perforated flanges or ears Of said pot, so that a space;/, exists between the pipes and fire-pot, as shown. The outer portion of the top edge of the pipes F3, F4, protrudes above the flanges to a slight, degree, as indicated at g, g.
    ■ .'“The fire-pot flares at top and contracts at its bottom; the flare and contraction.are gradual. The section of the metal, of which the pot is made, shows a gradual decrease in thickness from the centre of the depth of the pot in an up and downward direction, as indicated at 1, 2, 3. This construction or form- of ' the metal insures an equable heating, of the pot at all parts, and a uniform expansion and contraction by the principle of conduction, the thickest and most intensely heated portion imparting to the thinnest or less' intensely heated portions a large .amount of its heat, ,on the principle just'mentioned.
    “Above the fire-pot arid vertical pipes the coal-supply reservoir Gr is arranged. The reservoir is’ constructed with a flange, h, at its base, said flange turning down at its outer edge so as to form, a right angle, or thereabouts, as shown at i.- The rim.,- i, of the flange fits down upon the rim of the fire-pot and incloses the top opening of the fire-pot of the vertical pipes within* a continuous chamber J, as represented; the, said chamber constituting an enlargement to the upper portion of the1 fire-pot, as it were, and thus giving increased room for the expansion of the flande.
    “The diameter-of the coal'reservoir is decreased below the point-where th.C body of supply coal is suspended by means of air extension or ring-flange, k, which is in form of an inverted frustum of a cone. This flange also serves, in connection with a detachable ring v, which, also, is in' form of an inverted frustum of a cone, to form, a frame or sash for the reception of firebrick or other fire-proof material, as shown atm. The ring v has a horizontal flange, and bolts by the same, to the under 'side of the'flange n of the coal-supply reservoir. The fire-brick are .shaped so as to. forni, w,ben„.put tQgeth.er^.ae inverted frustum of a-cone, and- they,-therefore,-«when-damped between- the' devices, k, v, cannot descend, separately, out of their places, nor can they do so unitedly, as the largest-circumference of tho conic frustum m cannot pass through the space between the lower ends of the devices k, v.- It will be observed that the fire-brick continue'the contraction of the cokrtupply reservoir, and thus insure a gradual descent of the supply coal upon the central part of the bed of incandescent coal, and at the same time leave a large and open-space outside of the conic frustum m, for the free burning and expanding of the gases or flame. This result is also furthered by the dishing form of the flange b, the same forming a large circulating flame-channel J, all round the upper edge of the fire-pot, as illustrated.
    “The reservoir G is continued up to a horizontal division plate I of the stove, by means of an extension G1, as shown. The division-plate 1 has a large coal-induction hole n in its centre and several hot-air passages o o ncur its circumference or outside of the circle of the coal-supply reservoir, as shown. Around the central hole n there is constructed a small, combined cyiindric and conic hopper J, which is furnished with an adjustable valve s., and a removable cover-plate J2, as hereinafter described. Through and from the rear of this hopper there' extends a branch draft-flue r, the same leading into the main draft-flue F5, as shown. In order to open and close this flue (r) and also to opon and close the induction-hole to the coal-supply reservoir, the taper-valve s is fitted to the lower part of the hopper J, and up from the centre of the back of this valve a vertical rod sl extends and passes through the removable cover-plate P of the hopper, and also through a weight s2, as shown. The weight s2 is not level on its bottom with the top Surface of the cover-plate J2, nor is the quantity of metal on one side of the rod as great as that on the other side. The cover-plate, the valve, the rod, and the weight, are all connected together, so that by taking hold of the rod the whole can be lifted together, that is, when the .valve is raised, first, to its full stroke; but the connection is also such that, when the valve is required to be raised a less distance than its full stroke, the movement of the valve is independent of the cover-plate J2; therefore the branch-flue- r can bo opened and closed or the damper-valve adjusted without disturbing the cover-plate, and whenever such an adjustment of the valve is made, the weight, by reason of its being.unbalanced, will automatically bind upon the rod and hold it and the valve in suspension.
    “It is desirable to open the branch of the direct draft-flue when the fire is first started, and also before the cover-plate J2 is removed, first, in order to obtain a powerful draft, and second, to pass off the pent-up gases in the coal reservoir through the branch-flue, instead of allowing them to puff out into the room at the time when fresh coal is being introduced.
    “The organization thus far described has but one shell, and in order to make it a double shell or wall-stove a easing, K, L, M, is placed around it from base to top. The part K of this easing incloses a portion of the fire-pot, and of the vertical pipes and draft-flue. This part is finely perforate'd all around so as to admit air to the first wall, to be heated as indicated at ,í¿, The part L of the easing incloses the remainder bf.the vertical pipes and fire-pot, and also a small portion of the coal-supply reservoir, but not the main draft or smoke flue. ' It is also-finely perforated so as to admit cold air, as indicated at w1. The- part M of the casing- incloses the remainder of the coal-supply reservoir, and extends up to and unites with a stationary top or finishing plate W2. This part of the easing is not perforated, but the plate W2 has perforations through it for the escape of the confined heated air W3 into the room or into pipes leading to rooms above, as indicated by arrows W4.
    - “ It will be' seen that the air circulates all about the radiating surface, and thus • protects the same from rapid destruction by ■the fire, and while this is the ease the air is very thoroughly heated,- and discharged in that state into the room where the stove is situated, or into other conductors.”
    T-here.were in this reissue twelve claims, the first five of which, the complainants alleged, had been.infringed by the 'defendants, namely:
    “(1.) A base-burning, coal-supply reservoir stove or furnace, so constructed that the products of combustion do not pass up, around-, ánd above the supply-reservoir, nor up through the grate, but down-outside of the fire-pot toward the base of the '.stove, and out through a main draught flue, which leads directly from a 'space or chamber about the lower part of the stove, all for the purpose set forth and substantially as described.
    “(2.) The contracting of-the'dischargo end of the coal-supply reservoir, the expanding of the. fire-pot, and the extending of the -flame-passage down ward, for united operation, in a base-burning, coal-supply reservoir stove or furnace, essentially as set forth.
    
      “ (3.) A fire-pot resting on a base, and’ imperforated on' its inner or outer circumference, or from.its inner to its outer circumference, and so .constructed and Applied, with respect to a coal-supply reservoir, that an inclosed horizontal chamber for the free expansion and circulation- of the flame and gases, is formed all around and outside of the contracted discharge, and above the upper edge of the fire-pot, substantially as and for the purpose set forth.
    “(4.) The descending passage or passages,.in combination’ with the continuous flame-expansion and circulation passage, and a main draft-flue, leading out of the base or lower part of the stove or furnace, substantially as spt forth and for the purpose described.
    “(5.) Constructing the fire-pot of a base-burning, coal-supply reservoir stove or furnace, with an imperforated circumfexonce and in the form of a trumpet-mouth at its upper poi'tion,'.in combination with descending flame-passages, substantially as described and for the pui’pose set forth.”
    The specification of the patent of August. 11th, 1863, stated that the invention covered by it was an improvement on the stove patented by the x-eissue of February 3d', 1863, and’ consisted,
    “1st. In the construction of aii illumination-window or windows, at one or more points in the pontinuous flame-expansion chamber or channel, which is about the base of the coal-supply resei-voir and the top of the coal-burning fix’e-pqt, in combination with a descending flue which leads to a chamber about the base' of the stove, and from such chamber into a.chimney-flue;
    “2d. In the construction of a damper draft-flue in the continuous flame-expansion chamber or channel,' located as just stated, in combination .with a descending.flue, which first leads' down into a chamber about the base of tne stove, and then into the chimney-flue, with which the damper draft-flue connects dii’ectly. at the top of' the fire-pet.”
    '" The pateut (see figures on page 364) proceeded:
    “ Fig. 1 is a vertical longitudinal section of a stove patented by us at previous dates, with our improvements Of. the present date applied to it.
    “ Fig. 2 is a vertical tx’ansverse section, of the whole stove.
    
      “ Our first improvement is carried into practice by casting the fire-pot A with a rectangular, elliptical, or circular extension a (Fig. 1) (6) at one or more points of its upper.edge. This enlargement we extend through an opening in the outer casing or jacket B of the stove, and close it with mica or other transparent material C, as shown. We may find it more practical to form a short ledge on the upper edge of the fire-pot, as at b, and cast the
    Fig. 6.
    
      
    
    Fra- 7.
    
      
    
    enlargement c on the part D, which forms the expansion-flame passage E, as shown. In any case,.the illumination-window must be constructed so as to confine the flame and gases at this point within the fiame-ehamber E.
    “ Our second improvement is carried into practice by casting in like manner an enlargement of proper form to make a branch-flue E on the upper edge of the fire-pot, or on the lower edge of the part D, as represented. This branoh-flue we fun into'the smoke-pipe or draft-flue G-, and in order to open and close it at will, we have arranged within it a damper or valve 1, which has its fod, b3>- which it is turned, extended to the outside of the casing of the stove. By opening the damper a direct draft is obtained, and the fire can be kindled very speedily, and the draft does not have to pass up through the body of coal in the reservoir, as in our other patented stove. When the damper is closed, the highly ignited gases pass down the descending flues J J, as in our former patent.. We will here-state that we have slightly modified the-base of our stove by increasing-the depth of the ash-pit K, and dispensing with a chamber or space underneath the ash-pit. This space or chamber L, in which the heated products of combustion circulate to heat the base of the stove, and pass to the drafts or smoke-flue, being only around the ash-pit.”
    There were in this patent six claims, the first two of which, the complainants .alleged, had beeti infringed by the defendants, namely:
    “(1.) The combination of .the illuminating openings, flame-expansion chamber, coal-supply reservoir, fire-pot, descending flue and draft-flue, substantially in the manner and for the purpose described.
    “(2.) The combination with the flame-expansion .chamber, formed at the base of the coal-supply reservoir, and around the upper edge of the fire-pot of a base-burning stove, of the branch draft-flue with damper, when the same are located with respect to the flame-expansion chamber, fire-pot-, coal-supply reservoir, and descending combustion-flues, substantially as and for the purpose described.”
    Certain parts of the things above described were shown by the evidence, or were admitted, not to be new in A.D. 1861, when the complainants professed to have invented their base-burning stove. Among them these:
    The introduction of a magazine or reservoir into a stove for the purpose of supplying coal to the fire-pot below.
    The contraction of the lower end of the said féservoir, so .that it should be smaller than -the upper portion thereof, which, the complainants asserted, aided in sustaining the mass of coal therein, and prevented too great pressure upon the burning coal in the fire-pot.
    The construction of a fire-pot of larger diameter at. the.top than at the bottom.
    So also stoves so constructed that the smoke, gas, and other products of combustion passed from the fire-chaniber through-downward flues to or near the level of. the bottom of the stove were common; the revertible flues,so-called had long been in use,
    ■In-one-of the exhibits these .products of ,combustion were passed down and through a chamber in the base of the stove and thence out into the smoke.pipe.
    The addition of a direct draft to such stoves as were constructed with revertible flues, by means of a flue above the fire-pot provided with a damper to be closed after the fuel had been ignited was no novelty.
    The use of openings in the exterior'or shell of the stove and the insertion-of mica therein' in order to permit the light emitted in the process of combustion to be seen;-had been employed for very many years.
    The'stove of’the defendant, which the complainants ah léged infringed their patents, contained in combination' several of tbe devices, claimed by the-complainants, as—
    1. The flaring fire-pot supported by a base; the diameter of-the, pot narrower at the bottom than at the top..
    
      2. :A vessel over the fire-pot to receive the coal,- and let it down by way of supply on the fire below; • tbe lower end of the vessel being narrower than the upper..
    . '3; Kev'ertible flues outside of the pot to conduct the products of combustion downwards to the base of the stove and thence to a main draft-flue leading-thereout.
    • 4. A direct draft for such stoves as are constructed with revertible flues, the direct, draft being obtained by a flue passing out-above the fire-pot, and provided with a damper ■to be closed aftér the fuel, has been ignited.
    5. Holes or openings in the iron case of the.stove in which to put plates of .mica so as to let the fire.in the stove be seen through it, and to give light to the room in which the stove is.
    In the defendant’s stove, however,' there was no such peculiar structure of the lower extremity of the'supply reservoir, nor such a. closed expansion-chamber as iu the complainant’s stove; the reservoir did Hot rest on the fire-pot; nor had it a connection either with it or with the'sides of the stove; nor was there anything interposed to the passage of the products of combustion up and around the reservoir when the flue for direct draft was open; and when that flue was closed the flame was not detained over the burning coal, but the products of combustion passed directly across the edge of the fire-pot aud descended along its sides to the interior draft-passage.
    So, in the defendant’s stove, the entire space around the magazine ánd the fire-pot was'completely inclosed. There \Vas but a single chamber around, the reservoir over the surface of the burning coal and around.the fire-pot. 3 Through this chamber the products of combustion passed^ either through the direct draft-flue, when' that was in use, or to the base'of the stove and thence outward:
    The.court below dismissed the bill aud the complainant brought the ease here.
    
      Mr. K H. Bennett, for ike appellant; Mr. C. 31. Keller, for the appellee.
    
   Mr. Justice STRONG

delivered the opinion of the court.

The sort of stoves known as “ base-burners,” or self-feeding stoves, had been made and they were well known years before either of the complainants’ patents were granted, and it is not asserted that merely as base-burning stdves they arc within the monopoly of the patents.- The inventions claimed are alleged improvements in the structure and arrangement of such stoves. They consist in what is described as a new combination-of* old. and known devices producing a new mannfacture;'name'ly, a,stove uniting iu itself alhthe advantages of a, reservoir stove, and those of a i;evertible-draft stove which prevents the products of the combustion in the firé-pot from passing up, around, and over the reservoir, thereby heating the fuel therein so as to expel its gases, and cause their explosion as well as their escape into the apartments where the stove may be placed. All the-devices of which the alleged combination is made are confessedly old. No claim is made for any one of them singly, as an independent invention.

It must be conceded that a new combination, if it produces new and useful results, is patentable, though all the constituents of the combination were well known and in common use before the combination was made. But the results must be a product of the combination, and not a mere aggregate of several results each the complete product of one of the combined elements. Combined results are not necessarily a novel result, nor are they an old result obtained in a new and improved manner. Merely bringing old devices into juxtaposition, and there allowing each to work out its own effect without the production of something novel, is not invention. No one by bringing together several old devices without producing a new and useful'result the joint product of the elements of the combination and something more than an aggregate of old results, can-acquire a right to prevent . others from using the sanie devices, either singly or in other coriibiuations, or, even if a new and useful result is obtained, Can prevent others from using some of the devices, omitting others, in combination.

If now we exaunine the patents held.by the complainants, looking first at the objects sought to be obtained by the .combinations for which the patents were granted, they aré, as described in the specification, first, to prevent the passage of the products of combustion up, around, and over the top of the coal-supply reservoir, so as to heat a surrounding jacket . thereof; and, secondly, to heat a circulating or asoending body of air by means of radiated heat from the fire-pot, and at the same time to heat the base of the stove by means of direct heat circulating through descending flues which lead into the ash-pit, or around it, and to the srho'ke and draft flue. A third avowed object is to secure economy by retarding the fall of the coal into the fire-pot from the-supply reservoir, and by causing the flame to circulate outside of the contracted discharge of the reservoir, and around the upper edge of the.fire-pot, and thence to descend around or under the base of the stove.in its passage to the sinoke and draft flue. ' Such are the avowed objects of the combinations claimed to have been devised by the patentees, áiid' their effects they assert to be husbanding the i’adiated heat, and using it for the purpose of warming the upper-part of the stove and the room in which it is situated, as well as for heating air for warming rooms' above, if desirable, ahd at the same time so confining the direct fire heat, and keeping it in contact with the base portion of the'stove as to insure warming it to a comfortable degree. A second effect claimed is relief of the incandescent coal from the weight of the body of superincumbent coal,'thus preventing the compression of the burning coal in the fire-pot, and securing for the flame -free expansion, thus enabling it to act-with greater heatiug effect upon the-lower portion of the stove in its passage to. the smoke and draft flue.

The combination, employed to produce these effects consists of the following devices, among others:

1st. A flaring fire-pot supported by a base,'the-diameter of the pot being larger at-the top than át the bottom.

2d. A magazine or reservoir' for supplying coal, located over the fire-pot-, and having its lower end.contracted.

3d. Eevertible passages or flues outside of the pot for’the conduct of the products of combustion downwards to the base of the stove and thence to a main draft flue leading thereout.

ffth. A direct draft for such stoves as are constructed with ■ revertible flues, the direct draft being obtained -by a fl'iie passing oiit above the' fire-pot and provided with a damper to be closed' after the fuel has been ignited.

5th. Openings in the case or exterior of the stove and the insertion of mica therein for-the purpose of illuminating the.' room in which the stove may be with the,light of the burning fuel.

These devices with others are brought together and claimed as a new combination, and several combinations of some of. them- áre also claimed as inventions, producing novel and ■useful results. What those other devices are we need not specify, for it is not shown that, they are employed by the defendants.

The stove of the defendants does,.however, contain all those mentioned and contain them in combination. That each of them was an old device, well known, and in public use before the patents of the-complainants were granted is abundantly proved by the evidence submitted. A flaring fire-pot, a supply reservoir with its lower extremity of smaller diameter than its upper, revertible flues, a place for flame expansion above the fire-pot., the addition of a direct draft for-use iu igniting tie fuel, provided'with a damper, and the'insertion of mica for illumination openings, were all found in stoves before Hailes and Treadwell claimed to have made their invention. It is true there is a peculiarity in the'construction of the-lower extremity of the complainants’ supply resefvoir. it is provided with a circular flange, extending outward and bending downward, so as to fit upon the upper rim of the fire-pot, and thus form a closed combustion-chamber. This, of course, cuts off communication with the space around the upper part of the reservoir, and confines the flame and other products of combustion within a circular combustion-chamber thus formed, leaving no outlet for them except through ear passages into revértible flues. For this device, the peculiar structure of the reservoir, and the formation of the closed expansion chamber, there is no equivalent in the' ■ defendants’stove. There is no such closed-chamber. The l’eservoir does not rest on the fire-pot. It has no connection, with it, or with the sides of the stove. Nor is there any ob-stable interposed to the passage of the products of combustion' up and around the reservoir when the flue for direct ■ draft is open. Aud when that flue is closed, the flame is not detaiued over the burning coal, but the products of combustion pass directly across the edge of the fire-pot and descend along the sides thereof to the inferior draft-passagei Such an arrangement is not- fitted to' produce the effects sought and-claimed for the. complainants’ stoves. On the contrary, it plainly excludes them.

There are other differences:in the devices used both in the complainants’ and the defendants’ stoves, which we think are substantial, .and riot merely formal. The combination claimed by the complainants passes the products of pombustion out of the chamber through perforations in the flange or through, ears into, flues leading downwards but wholly exteyior to the fire-pot, and not- in contact with it. This arrangement makes it possible to introduce- external air through perforations in the outer casing of the stove, aud. allow it when heated by contact with' the- fire-pot and .the descending flues to escape from the top. Accordingly,the outer casing is perforated, and there is rio.closed magazine, around the fire-pot. But in the .defendants! stove there iff no such device and -no such effects are produced. There are no-external downward flues separated from the fire-pot. , The whole space around the magazine and the fire-pot is completely inclosed. There is but a single chamber arouud the •reservoir, .over the surface of the burning coal, and around the firerpot. Through'this chamber the products of combustion- pass, either through the direct draft-flue,^when that is' in use, or to tbe base of the- stove and thence outwards. This arrangement also excludes the possibility of an effect claimed for the Hailes and Treadwell invention. If admits of no space around the fire-pot to which the external air can have access.

It is not, then, the combination of old devices which!the defendants use that Hailes and Treadwell invented. It. is not those old devices that produce the new results claimed. The complainants’ combination is a different thing. - It has a‘greater number of constituent elements; It consists in the-employment of-the devices used by the defendants, together with others they do not use, and the result of the entire combination-is the production Of a stove differing very materially from that of the defendants. And the defendants’, combination cannot produce the results claimed for that of the complainants. We have said that the new results claimed, whatever they-may be, are not the,production of the com-' biped devices common to both stoves. The devices used by ' the defendants produce no new effects, because used in combination. The space.around the fire-pot leading t.o the base., doubtless secures the beneficial results long known to .follow the use of rever.tible flues. It-may be conceded to.be an equivalent for such flues. But the results of. its construction '. are not chánged by the. f'act that a flaring,fire-pot, and a supply reservoir with a contracted discharge end, and openings . for illumination are used in the same stove. It still operates to conduct the products of combustion to the baseband into the exit flue. No new operation is given to it by the corm bination. The same may be said of every other -device pmployed by the defendants which is also in the complainants’ combination., Each produces its appropriate effect un- • changed by.the others. That effect has no. relation to the combination; in no sense caq it be called its product. Thus far nothing novel is produced. This, then, is mere aggregation of devices, -not invention, and consequently the use of those devices, either 'singly or together, cannot be held to be any infringement' of rights belonging- to the' complainants.

We~.pass now to consider more in detail the claims in the complainants’ patents which it is alleged the defendants have infringed. The.first in the reissued patent, dáted February. 3d, 1863, is unquestionably too broad to be sustained, unless limited to the means described in the specification.' So it- was doubtless'intended by .the patentees to be limited, for the claim speaks of the combination claimed “ as substantially described,” that is, described in tile specification. Thus limited, one of its essential elements is a' closed combustion-chamber over the fire-pot, formed by a flange of the ' reservoir resting on the upper edge of t-he pot, and provided .with perforations or ears connecting-with two flues passing .downwards. This elemeht is indispensable for the purposes asserted in the claim, as well as in the specification. Apq the peculiar structure of the chamber is more than formal. It is functional.. It prevents the passage of the flame, and other products of combustion up, around, and. over the. supply reservoir, which is a leading avowed object of the invention, ' precisely the improvement patented. .'But this con-, stituent of the combination the defendants have neyeruséd,. nor have they used any corresponding device, or device producing the same results.

The second claim is for contracting the discharge end of . the coal-supply reservoir, expanding the fire-pot,.and extending the flame passage downward for united operation in -a base-burning coal-supply reservoir stove or furnace, essentially as set forth. The means set'forth for extending the flame passage downwards are perforations through the flange' forming the lateral boundary of the closed combustion-chamber, or ears leading thereout-and. close flues, extending, from the eárs or perforations downward at soma distance from the fire-pot through, a space bounded on one side by the fire-pot and on' the other by an outer casing of the stove perforated for'the admission, of external air. It might, perhaps, be questioned whether there is any device in the defendants’ stove corresponding to this, but waiving the consideration of that question, it is. very evident that-the. combination, of the three devices named is not. the work of invention. They have no relation to each other. Neither-the'form, of the feeder, nor the shape of the fire-pot bears at .all upon the direction of the. .draft passages. • There is no novel result flowing from the joint operation of the three devices. The revertible flues have no more to .do with a stove'supplied' by a feeder than they would have with a stove'supplied by hand. There is, therefore, nothing.in this claim-that interferes with what the defendants have done.

An essential element of the combinations mentioned in both -the'thir.d and fourth claims is the closed combu.stiour chamber formed, in part by a circular, flange extending outward and closing on the top of the fire-pot, with perforations in it, or ears for connection with the downward flues, or it is those perforations or ears leading out of such á chamber to the descending passages^ These devices the defendants do not employ, and they cannot' be used in the defendants’ stóve. There has been, therefore, no infringement of these claims.

The fifth claim i.s-the only remaining one contained in.the reissue which the defendants are. alleged to' have invaded. It is constructing the fire-pot of a base-burning stove, with an imperforated circumference and in the forta of a trumpet mouth at.its upper extremity, in combination with.déseeuding flame passages, substantially ás described, and for the purposes set forth. How .in combination? As described in the specification, united by means-of 'perforated flanges' or ears of the pot, involving, of course, the presence of a closed combustion-chamber constructed substantially as already described. • Construing the claim thus, as we think' it must be construed, the defendants have been guilty of no infringe-, ment.

Passing now to the second .patent, issued August 11th, 1863, we observe that its first claim was for a combination of the illumination openings, flame-expansion chamber, eoalsupply reservoir, fire-pot, descending-flue and draft-flue, substantially in the manner and for the purpose described. In-the main this is the same combi nation-as that claimed in the reissued patent we have had under consideration. The only chtinge is the addition of illumination openings. These were-' a well-known device applied to stoves long before either of the patents were granted. They perform no peculiar, office in the new combination..- They have no possible.relation to it. They do not affect, in the slightest degree, the results, of that combination, whatever they may be. It is impossible to’regal’d the mere addition of such openings to a stove containing the improvements described in the reissued patent, as, the formation, of a new patentable combination. It is not, invention. If, however, it were, ,the defendants have not trespassed upon it, for of the combination the peculiarly formed close expansion chamber is an essential constituent, and that is not found in the defendants’ stove.

Similar remarks, might be made respecting the-second claim of the , patent of August., the only remaining one' alleged to havé been infringed. All the'elements: of the1 combination.have not been used by the defendants.

Decree affirmed.

This case was argued before the CHIEF JUSTICE took... his seat, and he- did not participate'in the judgment. '  