Патент USA US2112272код для вставки
VMarch 29, 1938. M. DE LIN 2,112,272“ DRAFT CONTROL FOR FURNACES Filed June 8V, 24 Ill J6 1956 ’ 2 Sheets-Sheet l March 29, 1938. M. DE LIN 2,112,272 DRAFT CONTROL FOR FURNACES Filed June 8, 1956 2 Sheets-Sheet 2 l Patented Mir. 29, 193s ‘ 2,112,272 l' - UNITED STATES PATENT OFFICE 2.11am ' 4 nam coN'moL Foa mNAcas Munn De un, nounou, nnen., mimm- io n°1 land Furnace Company, Holland, Mich., a cor poration oi’ Michigan application :une s. 193s. serial No, 84,111 s _4 cum. _ (ci. izo-l-zs'n The present invention relates to furnaces. par ticularly to means for controlling the draft there of the door ÍI_i through which ashes and the like under the grate are removed), this lid being through; and its object is. generally, to -provide pivotally mounted to swing by its weight to the closed position shown in Figures 2 and 3; an opening to the combustion chamber, being the ci door i3 through which fuel is supplied thereto, having the closure i2; a damper il turnable by its shaft I 5 to the closed position shown in Fis such means improved in »various respects here 5 inafter set forth; and more particularly, to pro vide a plurality of draft controls having means foroperating `the same alternately or relatively to each other; and further, to provide draft con trols> for the radiator ring and the smoke dis ' 10 charge therefrom respectively and means for thus operating the same: and further, to provide said controls and a control for the air inlet and means- for operating the same alternately _or relatively to each other: and further, to pro 15 vide means for thus operating the controls by the opening and closing -of thev closure for the fuel-supplying door ofthe furnace; and further, _to provide adjustable means for thus operating ‘the controlsv selectively. 20 ' These and any otherl and more specific objects hereinafter appearing> are attained by, and the invention-finds preferable embodiment in, the illustrative furnace structure particularly de scribed inV the ~body of this specification and 25 illustrated by the accompanying drawings, in which: . Figure 1 is an elevational front view of a hot air furnace provided with draft controls and means for operating the same; 30 ` Figure 2 is a like view showing the controls in another. relative position; ures A1, 2 and in solid lines in Figure 4 to cause the smoke to pass in the direction indicated by l0 the arrows in Figure 4 from the combustion chamber’s outlet 5 and through said ring in order to more effectively heat the air inside the casing, this damper being turnable a quarter way-around to open position shown in Figure 3 and in dotted 15A lines in Figure 4 to permit- the smoke to pass more directly from said outlet i into the smoke pipe 8 to thus lincrease the force of the draft through said draft passage and the chimney; and the checkV draft opening I8 through the wall of the 20 smoke » pipe having. a closure lid I'l plvotally mounted to swing by its weight to the closed po sition shown in Figures l and 3. These draft controls are moved relatively to- ’ each other to closed or open positions by operat- 25 ing means including cables secured to vthe con trols respectively and a suitable cable-adjusting device for tautening or slackening the same, the illustrated form of such a device including a turnably mounted shaft i9 having crank arms 30 20, 2| manually turned as by the knob handle 40, .Figure 3 is a like view showing the controlsy A cable,.the chain 22, passing over pulleys indi cated at 2K3, 24, 25, 26 is secured at one end to in still another relative position; Figure 4 is a horizontal sectional view of por 35 tions of the structure taken on line >4_4 of Fig ure l; and Figure 5 is a horizontal sectional view of other portions taken on line -5-5 of Figure l. The hot air furnace illustrated by these draw 40 ings has'the combustion chamber l enclosed by a casing 2 with an air heating space 3 therebe tween, and a draft passage for conducting air to said chamber and smoke and products of com bustion therefrom. SaidV passage extends from 45 its air inlet l, through the combustion chamber and to a chimney (not shown) `and includes the outlet 5 for smoke from the combustion chamber, the radiator ring 6 surrounding the'upper part . the crank arm 20 and at its other end to the lid 9, this chain's length being such that when said 35 crank arm is turned to lower position shown in Figure 1 the chain is tautened to raise said lid> and open the air inlet I; but when this crank arm is turned to upper position shown in Figures 40 2 and 3 the chain is slackened to permit said lid to fall to the position shown in these views and close said air inlet. A cable, the chain 28, pass ing over pulleys indicated at 29, 30 is secured at one end to the other crank arm 2| and at its 45 other end to the lid i1, this chain’s length being such that when the crank arm is turned to lower position, in the interrelative position of certain of said chamber for heating air in the casing to ' of the draft controls as shown in Figure 2 (and as 50 be'discharged through suitable hot air pipes 1,y hereinafter explained), the chain is tautened to 50 and the smoke pipe 8 leading to the chimney. This draft passage has at several points along its length controls for the draft therethrough, such controls including: the closure lid 9 for said 55' air inlet I (desirably formed through yclosure, lq raise said lid and open the check draft opening I8 as seen in said view; but when this crank arm is turned to upper position shown in Figure 1 (in said relative position of the draft controls) the chain is slackened to permit this lid to fall to 55 2 2,112,272 the position shown in that view and close said check draft opening. . In another interrelative position of such draft controls as shown in Figure 3 (and as herein after explained), this chain 23 is slackened to permit the lid I'l to fall and close the check draft opening I6 when the crank arm 2| is in _lower position shown in said view. The closure I2 for the fuel-supplying door I3 hingedly mounted at 3l has an outwardly ex I4 and closes lid I'I (Figure 3) and the closing of closure I2 closes damper I4 and opens lid I'I (Fig ure 2) the lid 9 remaining closed in both cases; and that in the oppositely turned position of shaft I3 and lid 3 is opened and the damper I4 and lid Ch I‘I are closed in the closed position of closure I2 (Figure 1). The weight of_ the crank arm 38 is desirably great enough to swing the unlatched closure I2 to open position. The hook end 4I of block 42`may 10 tending arm portion 32 to which one end of a be engaged with any of the links of chain 33 in cable, the chain 33, is secured at 34, and passing over pulleys indicated at 35, 36, 31 this chain is secured at its other end to the crank arm 38 of the shaft I5. The weight of this arm urges the damper I4 to open position shown in Figure order to adjust the required deflection thereof, and 3 and in dotted lines in Figure 4. ' When the latch 39 is turned to released posi tion seen in Figure 3 and the closure I2 is opened as shown in that view, this chain 33 is slackened to permit the arm 38 to fall and open damper I4 thus causing the smoke to pass directly from the combustion chamber’s outlet 5 into the smoke pipe 8, so that smoke will be carried by the draft thus increased through the chimney and will not pass outwardly from said chamber through the fuel opening I3; but when the closure I2 is shut the chain 33 is tautened to raise arm 38 and again close the damper I4. 30 The parts of the means for operating the draft controls are so combined and operatively con nected as to function in an improved manner for one lof the crank arms 20, 2| may be held by a set screw indicated at 43 in desired turned posi tion on shaft I3 to adjust the relative annular posi tion of these crank arms. A coiled spring 44 in chain 33 renders the same somewhat elastic to cushion its action. ‘ The invention being intended to be pointed out in the claims, is not to be limited to or by details 20 of construction and arrangement of the particular embodiment thereof illustrated by the drawings or hereinbefore described. I claim: 1. In a furnace having a combustion chamber with a fuel-supplying door provided with a closure and a draft passage having an air inlet provided with a closure lid said passage including a smoke pipe having a check draft opening provided with a closure lid and a radiator portion between the 30 chamber and the pipe provided with a damper closed to conduct smoke through said portion and attaining certain desirable ends. For instance: - opened to conduct smoke directly into the pipe, -although the purpose of the control damper I4 means for operating the damper and the lids by is to direct the draft through the radiator ring for the opening and closing movements of the closure heating the air in the furnace casing., this damper including: a cable extending between the closure thus used tends by obstructing the draft passage and the damper tautened by the closing move to choke it with soot, etc.; the check draft control ment of the closure to close the damper and I6, I'l has no such air heating effect but it does not slackened by the opening movement -of the closure obstruct the draft passage to choke it with soot. to open the damper: an adjusting device; a second It is therefore desirable to employ these draft cable extending between said device and the lid controls at times selectively and alternately, of the check draft opening; a third cable extend although both are to be employed to increase the ing between said device and the lid of the air draft when the furnace door’s closure I2 is open. inlet; and a pulley movably in engagement with To effect such alternate use the chains 28, 33 are the second cable, lhaving a hook manually ad so connected that the movement of one affects justable in connection with the ñrst cable. the that of the other. In the illustrated construc adjusting device being movable to a position tion, this connection is made by engaging the wherein the first cable tautened to close the hook end 4I of the block 42 of the pulley indicated damper tautens the second vcable through said at 30 with a link of chain 33. connection to open the lid of the check draft open In Figure 1 the shaft I9 of the adjusting device ing and slackens the third cable to close the lid I8 is shown turned to the position wherein the of the air inlet, the adjusting device being movable draft controls are held thereby in that interrela to another position wherein the first cable tive position in which the furnace operates in its tautened to close the damper slackens the second 55 usual air-heating manner; that is, the lid 3 is cable to close the lid of the check draft opening open and the damper I4 and the check draft lid I'I and said device in its same position tautens the are closed, the closure I2 being also closed. third cable to open the lid of the air inlet. In Figure 2 the shaft I 3 has been turned to the 2. In a furnace having a combustion chamber position wherein the draft controls are held there with a fuel-supplying door provided with a closure 60 by in that interrelative position in which the and a draft 'passage having an air inlet provided draft through the combustion chamber is de with a closure lid said passage including a smoke creased and fuel consumption is lessened; that is, pipe having a check draft opening provided with the lid 9 is closed and the lid I'I is opened, but the a closure lid and a radiator portion between the damper I4 continues closed to heat the radiator chamber and the pipe provided with a damper 65 ring. closed to conduct smoke through said portion and In Figure 3 the shaft I9 remains in the same opened to conduct smoke directly into the pipe, turned position as in Figure 2 so that the lid 3 means for operating the damper and the lids by remains closed, but the closure I2- having been the opening and closing movements of the closure opened the chain 33 is thereby slackened to permit including: 'a cable extending over a pulley be 70 arm 38 to fall and open damper I4, and the side tween the closure and the damper and tautened wise mutually deflected relation of chains 33 and by the closing movement of the closure to close 28 and their length below the pulleys 31 and 23 the damper and slackened by the opening move have been so changed that, mutually acted upon ment of the closure to' open the damper; an ad through their connection (the pulley 38 and its justing device: a second cable extending over a 75 block 42), the opening of closure I2 Opens damper ëeçolid pulley between said device and the lid of 35 40 50 55 60 65 70 75 3 2,112,272 the `check draft opening; a third cable extending arm of said device and the lid of the air inlet; and between said device and the lid of the air inlet; and a connection manually adjustably joined to the first cable between the first pulley and the damper and having a pulley carrying the second cable between the second pulley and-the lid of the a connection including a member manually detach ably engageablewith the first cable at selected po sitions in the length thereof and having a pulley check draft opening, the adjusting device being movable to a position wherein the ñrst cable tautened to close the damper tautens the second 10 cable through said connection to open the lid of the check draft opening and slackens the third cable to close the lid of the air inlet, the ad justing device being movable to another posi tion wherein the first cable tautened to close 15 the damper slackens the second cable to close the lid of the check draft opening and said device in its same position tautens the third cable to open the lid of the air inlet. 3. In a furnace having a combustion chamber .20 with a fuel-supplying door provided with a clo sure and a draft passage having an air inlet pro vided with a closure lid said passage including a smoke pipe having a check draft opening pro vided with a closure lid and a radiator portion 25 between the chamber and the pipe provided with a damper closed to conduct smoke through said portion and opened to conduct smoke directly in to the pipe, means for operating the damper and the lids by the opening and closing movements of 30 the closure including: a cable extending between the closure and the damper tautened by the clos ing movement of the closure to close the damper and slackened by the opening movement of the closure to open the damper; an adjusting device 35 including a rotatable shaft with Aa pair of crank arms; a second cable extending between one arm of said device and the lid of the check draft open ing; a third cable extending between the other carrying the' second cable, the shaft being turn» abie to a position wherein the first cable tautened to close the damper tautens the second cable through said connection to open the lid of the check draft opening and slackens the third cable to close the lid of the air inlet,` the shaft being 1o turnable to another position wherein the first cable tautened to close the damper slackens the second cable to close the lid of the check draft opening and said device in its same position taut ens the third cable to open the lid of the air inlet 15 and the arms being turnable on the shaft to se lected _angularly spaced secured positions there on. 4. In a furnace having a combustion chamber with a fuel feed door and a draft passage having a damper, a draft inlet door and a smoke pipe with a draft check, flexible connecting means between the draft inlet door and the draft check consisting of chains and means connected there to eñective to open the draft check when closing 25 the draft inlet door and vice versa, flexible con necting means between the feed door and the damper for opening the latter when the former is opened and vice versa and consisting of a single chain, and a pulley over which the check 30 controlling chain passes, said pulley having means manually adjustably engageable with a selected link of the damper controlling chain for holding slack out of the check controlling chain when the damper is closed and permitting the 35 check controlling chain to slack to close the check when the damper is opened. _ MARTIN DE LIN.