US1859432A - Stove - Google Patents

Description

M y 1932- c. L. E. CHENU 1,859,432

STOVE Filed May 12, 1951 2 Sheets- Sheet 1 May 24, 1932.

Filed May 12. 1951 c. L. E. CHENU STOVE 2 Sheets-Sheet 2 Patented May 24, 1932 CHARLES LGUIS EMMANUEL CHENU, OF BR'UG-ES, BELGIUM STOVE Application filed May 12, 1931, Serial No. 536,891, and in Belgium May 15, 1930. i

The present invention relates to a stove,

the fire-pot of which has a lower discharge opening for the ashes, said opening being provided with a closing trap, and under which is arranged the usual ash-pan. The invention consists in the combination of means whereby the ash-pan can be progressively moved towards and from the fire-pot opening, so as to allow the progressive dis charge of theashes, and means causing the closure of the trap before said ash-pan can be removed from its housing. Furthermore, means are provided for securing the closure of the trap before another independent oper' ation can he performed previous to the removal of the ash-pan, such as,.for instance, opening the door of the housing containing the ash-pan.

The invention furthermore consists in the provision of means whereby the ash-pan will be lowered with respect to the fire-pot, so as to occupy different levels and to become progressively distanced from the discharge opening of the fire-pot.

The invention will be described hereafter with reference to the accompanying drawings, which illustrate different forms of emhodiments.

Fig. 1 is a vertical section of a stove with ash-pan and controlling means in conformity with the invention. 1

Fig. 2 is a partial section showingthe fire.- pot discharge opening with a somewhat different form of sliding trap.

Fig. 3 is a partial section of a form of embodiment of the means controlling the closing of the trap provided in the construction of Fig. 1. a

Fig. 4 is a partial vertical section of a looking device securing the closing position of the trap of Fig. 1.

Fig. 5 is a perspective view of the device controlling the up and down movement of the ash-pan with respect to the fire-pot.

F ig. 6 is a partial View of another form of embodiment of the means controlling the reciprocating movement of the ash-pan.

Fig. 7 is a vertical section of a stove comprising particular means for lowering the ash-pan in a progressive manner in conformity with the invention, and drawn along line C" D of Fig. 8.

Fig. 8 is a partial horizontal section line AB' of Fig. 7. I

Fig. 9 is a vertical section of a modified form of embodiment of the closing device used in Fig; 7 and comprising also a new along 'means securing the locking of the ash-pan.

has a lower discharge opening 5 for the ashes,

and underneath this opening is arranged the ash-pan 7which'normally rests on a support 8 connected to uprights 9 joined at their upper ends by a transverse bridge pivoted to a lever 10, one end of which is pivoted in 11 (see Fig. 5) to a fixed point of the stove 1; a vertical reciprocating movement is impart- "ed to the ash-pan 7 by moving the free end of the lever 10 in the indentations of toothed racks l2 and 12 (see Fi In order to prevent ropping of ignited fuel from the fire-pot 3 into the housing of the ash-pan during removal of the latter, the opening 5 will be closed'by means of a'trap 6. To secure the closing of the trap before the removalof the ash-pan, the trap is provided at its rear edge (Fig. 3), with an arm 13 pivoted about an axis 14, journalled in bearings 15 forming part of the trap 6. The arm 13 is held in a nearly iorizontal position by the ash-pan when the latter is lifted in its highest position (shown in dotted lines), the bottom of the ash-pan nearly closing the discharge opening 5; the arm 13 swings about .the axis 14 so as to occupy nearly a vertical position as soon as the ash-pan will occupy its lowest position, as illustrated in full lines in Fig. 3. On removal of the ash-pan 7, the 7 rear wall 16' of the latter will abut the arm 13 and have a pulling action on said arm. The

pivotal movement of the arm 13 is, however, limited towards the left hand side in Fig. 1 by the abutment 18, and by the fact, the trap 6 will slidein the position closing the opening 5. For the removal of the ash-pan after the trap 6 has been brought in the closed position, it is necessary that the forward edge of the support 8 of the ash-pan be somewhat behind the vertical line passing through the end of the arm 13 when the latter is in the position corresponding to the closing of the trap, so that the lowering movement of the ash-pan disengages the rear wall 16 from the end of the arm 13.

lVith reference to Fig. 3, A indicates the lowered position of the ash-pan before closing of the trap. B indicates the position of the ash-pancorresponding to the closing of the trap. C indicates the lowest position of the ash-pan 7 disengaged from the arm13.

On replacing the ash-pan on its support 8 when the latter is in position A,the arm 13 will swing backwards by theabutment of the wall 16 of thepan '7. lVhen the support 8 with the pan 7 are brought in the upper posi tion, the arm 13 is brought back to its initial position, by thefact that said arm is rearwardly inclined with respect to the vertical passing through'the axis 14. 1

As illustrated .in Fig. 1, the discharge opening 5 can be closed by opening the door 2 of thehousing of the ash-pan, the trap 6 being connected to said door 2 by a rod 19 connected to the forward end of the trap and passing through the wall of the housing 2. Maid rod 19 engages a slot 21 provided in a lug forming part of the door' 2, the connection betweenthe lug and the rod being secured by a knob 22 having a larger diameter than the width of the slot 21. By thisarrangement, the movement of the door 2, when opened, will cause simultaneously the closing movement of the trap 6. p

Therod 19 can also be connected to the sliding trap 6 by a link connection allowing the rod to remain engaged in the slot 21 when the door is opened by swinging downwards about a horizontal axis.

For preventing an untimely opening of the trap 6 as long as the ash-pan 7 will not occupy its normal closing position next to the discharge opening 5, the trap 6 is locked by means of a locking arm 23 pivoted in 24 at the front sideof the fire-pot 3, this locking arm resting on a stop 25 also projecting on the pot; locking is secured by means of a beak 26 on the arm 23 and engaging a step portion 27'provided on the trap 6 when the latter is in the closing position. For this purpose, towards the end of its forward closing movement, the step portion 27 of trap '6 will engage a slope provided at the rear side of the beak '26 and adapted for securing the lifting movement of the locking arm '23, 'WlllCh will drop in the locking positionwhen the step portion 27 has passed beyond the stop.

Unlocking of the trap 6 is operated on swing about its axis towards the position illustrated in mixed lines, and in which the step portion 27 of the trap 6 is disengaged from p the beak 26.

As illustrated in Fig. 2, the rod 19 has a bend, so as to remain out of contact with the front wall 28 of the ash-pan 7, a disposition which avoids the necessity of cutting a slot 7a in said wall, as illustrated in Fig. 1.

* Locking of the trap 6 isalso secured in the form illustrated in Fig. 4, in which the locking arm 23 simultaneously secures the look ing of the door 2 of the ash-pan housing 2. In this'form of embodiment, the locking arm 23 has a beak 29 arranged in the free front end portion and adapted to enga e a shoulder 30 provided on the door 2, which, in this way, is normally locked when in the closed position. On closing the discharge opening 5 by the trap 6, the step portion 27 co operates with the corresponding slope of the beak 26 forming part of the locking arm 23, so that the latter swings upwards about its axis 24:. By this movement the beak 29 becomes disengaged from the shoulder 30. "When the step portion 27 has passed said slope, the locking arm 23 swings down and its portion 23a engaging the step portion 27",

keeps the arm 23 in such a position that the shoulder 30 remains free for allowing the opening of the'door 2. From this arrangement results that the door 2 can only be opened andthe ash-pan removed after the opening 5 will be closed by'the trap 6. The

door 2 can always be closed by the fact that "a slope is provided on the shoulder .30, said slope acting on the beak 29 to lift'the lock 23, without however unlocking the trap 6 when the latter is in the closed position.

The unlocking of the trap 6 is secured as previously described, when the front wall 28 of the ash-pan 7 lifted in its highest position will swing the lock 23 by engaging the portion 32, so that the step portion 27 is freed from the beak 26.

As illustrated in Fig.5, the progressive lowering movement of the ash-pan resting on *the support 8, is secured by means of the toothed racks 12, 12 pivoted in' the direction of the arrows X, 'X, in 32 and 32, on a fixed part of the stove, so that the lever 10 can drop from a tooth-of the rack 12 on an opposite tooth of the rack 12 and vice versa when said. toothed racks are rocked in one and the other direction. This rocking movement is operated, for instance,'by means of the hand lever 33. i

The lifting movement of the support 8 from the lowest posltionto the highest po-" sition is secured by a rod 34, freely sliding in fixed guides 34a, 34?), said rod being provided with an ergot 34d adapted to engage the lever 10 to lift the latter when an upward traction is operated on said rod. During the upward movementof the end of lever 10, the toothed racks will swing in both directions under the action of the end of lever 10 alternately engaging the sloping sides of the teeth of the racks.

Fig. 6 illustrates a modified form of embodiment of the controlling means of lever 10. This lever is formed with two portions, 10 and 10, connected by laths 35, so as to provide for a closed space 34, in which passes the bar 36 pivoted in a fixed portion of the stove. In order to allowa progressive lowering motion of the support 8 by swinging the bar 36 in one and the other direction, this bar is provided on its two opposite faces with rack teeth, the indentations 37 of which alternate and sustain the lever 10 by corresponding edge portions provided inside the closed space 34.

In order to prevent the free sliding movement of lever 1-0, the length of the portion 34 of said lever is somewhat smaller than the distance between the alinements of the edges or" the rack teeth.

Vith reference to Figs. to 9, the vertical movement of the ash-pan is secured by means of the following devices the ash-pan 7 is provided at each of its corners with ergots or lugs 76, 7d, as more particularly illustrated in Fig. 8. Referring to Fig. 7, these ergots rest on fixed elements 416 and 40b in the form of guide rails forming part of the lateral walls constituting the ash-pan housing 2. Other fixed elements 41a and 40a are arranged in front of the intermediate spaces left respectively between the fixed elements 41?) and 40?). On moving the pan towards the left in the direction of the axis of Fig. 8, when the ergots such as 7 b and 7 cl leave the upper pair of fixed elements, such as 41?), 40?), the pan drops vertically until the ergots abut the pair of fixed supports immediately arranged underneath, such as 41a and 40a. If afterwards the pan is moved in the opposite direction, it drops furthermore for a determined height and rests on the second pair of fixed elements such as 416 and 40b, and so on. For imparting this alternative movement to the pan, the latter is'provided at its rear wall with a blade 76, having a notch 7;- (see Fig. 8) arranged so thatthe blade 7e can slide along a substantially vertical guide 44 of T-section corresponding to the section of the notch 7 f. This guide 44 forms part with arod 44a slidable in a bearing 2a provided in the wall of the housing 2. This rod is linked by its fork 44b to a lever 45, pivoted in a fixed point 45a, so that, when a swinging movement is imparted to the lever '2 45, this movement is transmitted to the guide ,shovel.

44 and by the latter to the pan 7, by means of the connecting blade 7 e.

For the purpose of easily replacing the ash-pan 7 in its normal position as illustrated in Fig. 7, a guide rail such as 42 is provided on eachof the lateral walls of the housing 2 (Fig. 8), said guide rail guiding the ergots 7d towards the upper fixed resting elements 40?). The curved shapeof the guiding rails 42 secures the passage of the rear wall of the pan 7 underneath the rear lower edge of the fire-pot 3. In a similar way, for facilitating the removal of the pan 7 at the end of its downward'stroke, the lowest elements 40b of'each side wall are prolonged in a guide rail 43.

The rear ends of the guide rails 42 are arranged at such a level that when the ergots 7d drop on the upper fixed elements 40?), the notch of blade 76 will be engaged by the flanges of the T-section guide 44. At the end of the downward movement of the pan,

when the pairs of ergots'7d, 76 leave the last pairs of fixed elements 40a and 41a and drop on the last pairs of elements 40?) and 416, the guide 44 is disengaged from the notch 7f, so that the ash-pan 7 is automatically disengaged from its driving means.

As clearly seen in Fig. 8, the ergots 7 b are of greater length than those 703. This'arrangement prevents upright engagement, when replacing the ash-pan 7, of the ergots 7d on the fixed elements intendedfor the ergots 7 b. It is obvious that in this case the distance between the two'pairs of fixed elements such as 41a, 41?) arranged on either side of the axial line CD" of Fig. 8 will be greater than that of the two pairs of fixed elements such as 40a and 40b.

The embodiment shown in Fig. 7 also illus trates a modification inthe security device. The locking arm 23 is bent at its free end, so that its control is secured by the abutment of said end with the bottom of the pan.

With reference to Fig.9, the fixed guide elements 416 and 40b cooperate with slopes 46a, 46?) arranged to bring the ergots after each downward movement of the pan, on the fixed resting elements immediately underneath. By this arrangement, the lowering of the pan is performed consequently to a movement imparted to the pan always in one and the same direction. This simplifies the driving device for said movement, so that the guide 44 simply abuts the rear end of the pan which will be preferably shaped as a In the construction illustrated in Fig. 9, the trap is actually replaced by using a pair of ash-pans'7. When one of the pans has arrived at the end of its downward stroke, the second pan is brought in the upper position by means of the guide rails 42. The introduction of the pan is facilitated by its shovel-shape, thei lower edgeoi whichis directed towards the rear wall of the stove.

In this construction a security device for controlling the removal of the ash-pan comprises a lever 48 pivoted on a fixed point 486 and having a beak i8a intended to prevent the removal of the ash-pan when in its lowest position, as long as the second ash-pan has not been brought in position underneath the discharge opening of-the fire-pot 3. For this purpose, the beak t8a retains the ash-pan 7 by engaging the track to be followed bythe ergots 'Z'dwhen the ash-pan is removed (see position illustrated in dotted lines). w

The end of the lever 48 opposite to the beak 48a is linked in 48d'to the ends of a rod 49, the other end of which is pivoted in d to the free end of a lever 50 pivoted to a fixed pin 50a, so that under the action of the weight of lever 50, that of the rod 49 and eventually its proper weight, the lever 4L8 will normally tend to engage the beak iSa in the passage track of ergot 7d. 7

The lateral sides of the ash-pan 7 end rearwards in slopes 7 9 provided to cooperate with an ergot 50b projecting from the lever 50,

' so that the latter moves upwardly when one of the pans 7 is introduced to occupy its highestposition'. By this movement transmitted through rod 49, the lever 48 swings about its pivot pin, so that the beak 48a is removed from the'track of the ergot 'Zcl, so that the lower pan filled with ashes can be removed.

lVith reference to Figs. 7 to 9, the fixed elements 40a, 40b, 41a, 41?) are connected by side pieces 40d, 41d preventing disengagement of ergots 7b and 7d out of their normal track. ,VVith reference to Fig. 9, for the purpose of avoiding the falling of ashes out of the pans 7 at the rear side where said pans have I no vertical wall, the invention provides that the distance between the fixed elements 40a, 40b, forming part with one side wall, will be smaller than that of the fixed elements 4:164, 41b forming part of the same wall, so as to secure during the downwardmovement of the an inclination of said pan from the rear to the forward, thereby facilitating the sliding of the ashes in the pan towards the front side, where a vertical wall has been provided.

Eventuallythe number of fixed elements 40?) will be reduced to two on each side wall, so that the downward movement of the pan will occur substantially as a rotation about the axis of ergots TcZ resting on the rear ends of rails 43 conveniently shaped for the purpose. Eventually the fixed elements lOa and 4012 will be abandoned, and in this case they will be replaced in their supporting actions by'the rear end of the guide'rails 42 conven- 'iently prolonged.

I claim: 7 V 1. In a stove comprising a fire-pot with lower discharge opening and an ash-pan arranged inside a housing, the combination of amovable closing'trap for said discharge opening, and means securing the" compulsory closing of: the trap before completing the removal of the ash-pan, with means for pro gressively moving the ash-pan from and to progressively moving the ash-pan from and towards said discharge opening. 7

3. In a stove, a fire-pot with lower discharge opening, a housing with opening, an ash-pan arranged inside the housing, a door hinged to said housing, a slidable closing trap for said discharge opening, an armpivoted to the trap andengaging a slot in the door,

so that the SWlIW'lH movement of the door secures the closing of the trap, and means for progressively moving the ash-pan from andtowards the discharge openlng.

l. Ina stove, a fire-pot wlth lower charge opening, a housing wlth opening, an

dis-

ash-pan arranged inside the housing, a door hinged to said housing, a slidable closing trap for said discharge opening, an arm pivoted to the trap and engaging a slot in the door, so that the swinging movement of the door secures the closing of the trap, a. locking bar pivot-ed in fixed relation to the stove and adapted to lock the trap in the closed position, and means for moving theash-pan close to the discharge opening so as to engage the locking bar for unlocking same.

5. In a stove, a fire-pot with lower discharge opening, a housing with opening, an ash-pan arranged inside the housing, a door hinged to said housing, a slidable closing trap for said discharge opening, an arm pivoted to the trap end engaging a slot in the door, so that the swinging movement of the door secures the closing of the trap, a lockingv bar pivoted to the fire-pot, an abutment fixed to the fire-pot and engaging the locking bar so as to hold it in asubstantially horizontal and forward direction, a beak with rearwardly directed slope on the under-edge of the locking bar adapted to be engaged by the front portion of the trap, and means for movin the ash-pan close to -the discharge opening for the purpose set forth.

6. In a stove, a fire-pot with lower discharge opening, a housing with opening,'an ash-pan arranged inside the housing, a door hinged to said housing, a slidable closing trap s for said discharge opening, an arm pivoted to the trap and engaging a slot in the door, so

that the swinging movement of the door secures the closing of the trap, a locking bar pivoted to the fire-pot, an abutment fixed to the fire-pot and engaging the locking bar so as to hold it in a substantially horizontal and forward direction, a beak with rearwardly directed slope on the under-edge of the locking bar adapted to be engaged by the front portion of the trap, a second beak extending downwardly in front of the first-named beak on said locking bar and adapted to engage a shoulder provided inside the housing door, and means for moving the ash-pan close to the discharge opening for the purpose set forth.

7. In a stove, a fire-pot with lower discharge opening, a housing with opening, an ash-pan supported inside the housing, a supporting frame, a lever to which the frame is pivoted, said lever having one end pivoted in fixed relation to the stove and the other end engaging the teeth of a pair of swivelling toothed racks arranged to allow a progressive downward movement of the corresponding lever end over the successive teeth, means for swinging the lever in upward direction, a door hinged to said housing, a slidable closing trap for the above-mentioned discharge opening, an arm pivoted to the trap and engaging a slot in the door so that the swinging movement of the door secures the closing of the trap.

8. In a stove of the type described, means for supporting the ash-pan at different consecutive levels comprising lugs extending latterally at each corner of the pan, fixed supports arranged in two substantially vertical rows for each lug and in alternatively staggered formation, and means for reciprocating the ash-pan for the purpose set forth.

9. In a stoveof the type described, means for supporting the ash-pan at different consecutive levels comprising lugs extending laterally at each corner of the pan, fixed supports arranged in a substantially vertical row for each lug, sloping guide-ways adjacent to said row of fixed supports, one guideway extending over a distance equal to that separating adjacent fixed supports, and means for moving the ash-pan for the purpose set forth.

10. In a stove of the type described, means for supporting the ash-pan at different consecutive levels comprising lugs extending laterally at each corner of the pan, .fixed supports arranged in two substantially vertical rows for each lug and in alternatively staggered formation, a horizontal blade ex tending at the rear wall of the ash-pan, a substantially vertical guide element engaging a notch in said blade, an arm on said guide element extending outside the ash-pan housing and a pivoted lever for reciprocating said arm.

11. In a stove of the type described, means for supporting the ash-pan at different consecutive levels comprising lugs extending laterally at each corner of the pan, fixed supports arranged in two substantially vertical rows for each lug and in alternatively staggered formation, fixed guide-rails engaging the lugs during the introduction and removal of the ash-pan, and means for reciprocating the ash-pan for the purpose set forth.

12. In a stove of the type described, means for supporting the ash-pan at different consecutive levels comprising lugs extending laterally at each corner of the pan, the front pair of lugs being of different dimensions than that of the rear pair, fixed supports arranged in two substantially vertical rows for each lug and in alternatively staggered formation, and means for reciprocating the ashpan for the purpose set forth.

18. In a stove of the type'described, means for supporting the ash-pan at different consecutive levelscomprising lugs extending laterally at each corner ofthepan,fixed supports arranged in two substantially vertical rows for each lug and in alternatively staggered formation, means for reciprocatin the ashpan for a downward movement by the lugs engaging the fixed supports in succession, a locking lever preventing removal of the ashpan when in its lowest position, and means for unlocking thelever by the introduction of a second ash-pan in the upper position close to the fire-pot.

14. In a stove of the type described, means for supporting the ash-pan at different consecutive levels comprising lugs extending laterally ateach corner of the pan, fixed supports arranged in two substantially vertical rows for each lug and in alternatively staggered

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