AU463553B2 - An oil burner - Google Patents

Description

the air from contacting the wic o as to e.xtinguish the

burner. However, in such an emergency when the earthquake

occurs especially at more than IV of seismic intensity

wherein it is required to immediately retire to a safe place,

the operator cannot afford to walk to the location of the

oil burner to extinguish the burner. Therefore, the burner

continues the combustion to result in that the fire occurs. Sum;ary of the Invention

This invention relates to an oil burner having a wick

movable upwaardly and downwardly for combustion and extinguish ment.

It is a principal object of the present invention to

provide an oil burner wherein the combustion automatically

stops upon the occurrence of the strong earthquake or upon

the application of impact on the burner.

It is another object of the present invention to

provide an oil burner adapted to adjust the sensitivity of

the burner to the earthquake or impact when the combustion discontinues.

In accordance with the present invention, there is

provided an oil burner of the type having a wick arranged to

move upwardly and downwardly for combustion and extinguishment, comprising an oil tank, said wick immersed at its lower end

in the oil within said oil tank, inner and outer wick sleeves

arranged in a coaxial relationship to each other to dispose

said wick between them and secured to said oil tank, a stop

positioned above the upper edges of said inner and outer wick

sleeves to determine the uppermost position of said wick, a

cover comprising a low.er sleeve having a bottom wall slidably

fitted over the outer periphery of said outer wick sleeve,

3 4635.53

45168/72 said cover having perforations provided therethrough for

arranging an air streai flowing toward that end of said wick

ex::osed fro said outer wick sleeve, an extinguishing sleeve

slidable vertically along said outer periphery of said

outer wick sleeve and mounted on said bottom wall of said

lower sleeve of said cover for moving together with said

cover, and an actuating means responsive to oscillation

applied on said burner to u_.wardly move said cover and said

extinguishing sleeves to an extinguishing position in which

the latter coacts with said stop to shut off the air flowing

towcards the exposed end of said wick through the perforations

in said cover from contacting the exposed end of said wick

and to confine oil vapor from said exposed end of said wick. The above and other objects and attendant advantages of the present invention will be more apparent to those skilled in the art from a reading of the following detailed description in conjunction with the accompanying

drawings in which some preferred embodiments of an oil

burner in accordance with the present invention are illustrated. Brief Description of the Drawings

Figure 1 is a vertical cross sectional view of a preferred embodiment of an oil burner in accordance with the

present invention, showing in the normal position during its

operation; Figure 2 is a fragmentary enlarged vertical cross sectional view of the oil burner shown in Figure 1, showing

in emergently extinguishing position;

Figure 3 is a fragmentary enlarged vertical cross

sectional view of another embodiment of the present

invention, showing in the normal position during its

4635.53 operation, 45168/72 Figure 4 is similar to Figure 3, but showing in emergently extinguishing position; Figure 5 is an enlarged perspective view of an actuating means employed in the oil burner shown in Figure 3; and Figure 6 is a fragmentary perspective view of one of retainers employed in the oil burner shown in Figure 3. Detailed Description of the Embodiments Referring now to Figures 1 and 2, a petroleum or oil burner is generally indicated by numeral 1 and comprises an oil tank 2, a cylindrical frame 3 securedly mounted on the 4 top of the oil tank 2 and a combustion cylindrical wall securedly mounted on the top of the cylindrical frame 3. The frame 3 is provided with a plurality of perforation 3a which serves to guide the air into the chamber defined by the cylindrical frame 3. Upwardly extending from the bottom of the oil tank 2 is an inner wick sleeve 5 secured to the upper and bottom walls of the oil tank 2 in a fluid tight manner and upwardly extending from the upper wall of the oil tank 2 in a coaxial relation to the inner wick sleeve is an outer wick sleeve 6 secured to the top wall of the oil tank in a fluid tight manner. A wick 7 is disposed and held between the inner and outer wick sleeves 5 and 6 with the lower end of the wick immersed in oil within the oil tank 2. It will be understood that the wick 7 is movable upwardly and down- wardly for combustion and extinguishment by a conventional means not shown. A stop 8 may be so arranged that the stop engages the top edge of the wick 7 and restricts the upward 4635,53

168 72 movement of the wick to the position as shown in Figure 1 wherein the end 7a of the wick 7 is exposed to the air and the combustion occurs in the end of the wick and the down- wardly extending cylindrical portion 8a of the stop is secured to the inner face of the inner wick sleeve 5 at and adjacent its end in a suitable manner. In order to expand the flame from the exposed end of the wick is provided a conventional flame expanding assembly 32 which is secured to the cylindrical portion 8a of the stop 8 in a suitable manner. An enclosing cover 9 comprises a lower sleeve having a bottom wall lOa slidably fitted over the outer periphery of the outer wick sleeve 6 and an upper sleeve 11 secured at its lower edge to the upper edge of the lower sleeve 10 by any suitable means and slidably engaged with the inner edge of the upper wall of the cylindrical frame 3. The cover 9 engages against a free end of a bearing lever 12 in a vertical plane which may be described hereinafter. The cover

9 has a normal position shown in Figure 1 in which the cover 9 lies at a lower level. The downward movement of the cover 9 is effected by its gravity. The enclosing cover is provided with a plurality of perforations 13 in the lower sleeve 10, which are so arranged that they arrange the air stream flowing towards the exposed end of the wick 7 when the cover 9 is in the normal

lower position. An extinguishing sleeve 14 is mounted on the bottom wall 10a of the lower sleeve of the cover 9 and serves to shut the exposed end of the wick 7 together with the stop 8 from contacting the air towards the exposed end when the 4635,53

451681/72 sleeve 14 occupies the uppermost position shown in-Figure 2. In the normal lower position of the cover 9, the extinguish- move-- ing sleeve 14 also lies at a lower level. The upward cover ment of the extinguishing sleeve 14 together with the lever- 9 is effected by the pivotal movement of the bearing 12 in a clockwise direction as viewed in the figures. The bearing lever 12 is pivotally mounted on a of the bracket 15 which in turn is secured to the upper face the end oil tank 2. The bearing lever 12 is connected at remote from the bearing end to one of ends of a flexible the strand strand 16 such as a chain and to the other end of is secured an oscillation detector 17 comprising a weight face of the 18. The weight 18 is normally mounted on the top oil tank at its prede termined location. The top face of the weight oil tank 2 preferably has a flat plane to mount the 2a-, 18 at the predetermined location and includes a dowel at its which engages a corresponding recess in the weight bottom face so that the weight I8 is positively positioned the on the top face of the oil tank 2. In such position lever 12 flexible strand is free to move so that the bearing viewed can-move pivotally in a counterclockwise direction as as well in Figures 1 and 2 until the extinguishing sleeve 14 as as the enclosing cover 9 reach the normal lower position also shown in Figure 1. The oscillation detector 17 may ,comprises a second or auxiliary weight 19 which has a tapped turn is recess 19a into which is A threaded pin 20 which in of the studded into the primary weight 18. The movement 18 causes auxiliary weight 19 relative to the primary weight to the center of gravity of the oscillation detector 17 shift one to another position to thereby adjust the 746 35. 53

45.1 68 /72 sensitivity of the detector 17 relative to the oscillation which is exerted on the burner. When the oscillation is exerted on the burner 1 due to earthquake or the like to tilt or tip it or when the

impact is applied on the burner due to external strike to tip it, then the weights 18 and 19 are removed from the predetermined position and as a result the pulling force is exerted on the flexible strand 16 so that the bearing lever 12 pivotally moves in a clockwise direction as viewed in Figures 1 and 2 until the extinguishing sleeve 14 together with the enclosing cover 9 reaches the position shown in Figure 2. When the extinguishment sleeve 14 is in the position shown in Figure 2, then the sleeve is closely spaced from the outer edge of the stop 8 to substantially enclose the exposed end 7a of the wick 7 so that oil vapor from the exposed end of the wick is confined within the space defined by the stop 8 and the extinguishing sleeve 14 and the air flowing into the cover 9 through the perforations 13 thereof is shut off from contacting the exposed end of the wick 7. As a result the combustion immediately stops because of the shortness of the air and of the confinement of the oil vapor. It will be understood

that the inclination angle of the oil burner on operation of the extinguishing sleeve 14 may vary by adjusting the position of the auxiliary weight 19 of the oscillation detector 17 relative to the primary weight 18. Referring now to Figures 3 and 4, there is shown a modification of the present invention wherein the extinguish- ing sleeve 14 is provided with an enlarged cylindrical ex- tended portion 14a and a coil spring 20 is disposed around 4635.53

45168 72 the outer periphery of the outer wick sleeve 6 and between

the top of the oil tank 2 and the shoulder of the extinguish- ing sleeve 14 so that the sleeve is urged to upwardly move along the outer wick sleeve to the position shown in Figure 4. The cover 9 is rotatably supported on the shoulder of the extinguishing sleeve 14 and is provided at its bottom wall with circumferential slots 21 with which are engageable hooks 22a of retainers 22 which in turn are shown to be secured to the skirt of the outer wick sleeve 6. The

retainers serve to retain the cover 9 in the lowermost position as shown in Figure 3 from upwardly moving by the action of the coil spring 20 by engaging the hooks 22a of the retainers 22 with the edges of the slots 21 in the bottom of the cover 9. Thus, the extinguishing sleeve 14 is normally retained in the lower position in which the upper end 7a of the wick 7 is exposed to the air flowing into the chamber defined by the cover 9. The cover can be rotated by

an arm 23 secured to the bottom wall of the cover 9 described hereinafter, so that the hooks of the retainers 22 are disengaged from the edges of the slots 21 in the cover 9. When the retainers 22 are disengaged from the cover 9, then the cover 9 together with the extinguishing sleeve 14 upwardly moves under action of the coil spring to their position shown in Figure 4 in which the combustion stops. Adjacent to the arm 23 is disposed an operating lever 24 pivotally mounted on a pivot pin 25 secured to a C-shaped bracket .26 which is secured to a base 27 attached to the top of the oil tank 2. One arm of the lever 24 extends through an opening 28 in the frame 3 and is closely

1681/72 spaced from the arm 23 secured to-the cover 9 while the other as arm of the lever 24 is secured to the flexible strand 16 described in connection with the aforementioned emdbodiment 18 and the other end of the strand is connected to the weight coil as described in 'connection with the above embodiment. A spring 29 is disposed around the pivot pin 25 with one end and-.. of the spring 29 engaged with the web of the bracket 2.6 the other end of the spring engaged with the leg portion of the lever 24 so that the said one arm of the lever 24 is urged to move away from the arm 23. in order to limit the movement of the lever 24, a stop 30 may be provided integrally the of the bracket 26 and engagedly with the leg portion of lever 24. The weight 18 may be mounted on a flat plate 31 secured to the bracket 26. When oscillation or impact is applied on the oil burner to dismount the weight 18 from the flat plate 31, the lever 24 rotates in the direction indicated by an arrow shown the in Figure 5 against the coil spring 29 to engage against arm 23 so that the cover 9 rotates in the direction indicated by an arrow shown in Figure 6 through the arm 23 until -the retainers are disengaged from the edges of the slots in the bottom of the cover 9. Therefore,' the cover 9 moves upwardly

together with the extinguishing sleeve by action of the coil spring 20 around the outer wick sleeve 6 until they reach the position shown in Figure 4. Thus, the air through the

perforations in the cover 9 is shut off from contacting the

exposed end 7a of the wick 7 and the oil vapor from the exposed end is confined by the extinguishing sleeve 14 with result in that the combustion stops. When specific embodiments of the invention have

45.168/n been described and illustrated in detail, it will be under- only and are stood that the same are for illustration purpose that not to be taken as a definition of the invention and occur various modifications changes on the same will easily to those skilled in the art without departing from the scope of the invention as defined in the appended claims.

4635.53

4 5 168 72 are as follows: Trhe claims defining the invention a wick 1. An oil burner of the type having downwardly for combustion arranged to move up:wardly and an oil tank, said wick and extinguishment, comprising oil within said oil tank, immersed at its lower end in the in a coaxial relation- inner and outer wick sleeves arranged wick between them and ship to each other to dispose said positioned above the upper- secured to said oil-tank, a stop wick sleeves to determine the edges-of said inner and outer a cover comprising a lower uppermost position of said wick, fitted over the outer sleeve having a bottom wall slidably sleeve, said cover having per- periphery of said outer wick for arranging an air stream forations provided therethrough wick exposed frcm. said flowing toward that end of said sleeve slidable vert- outer wick sleeve, an extinguishing of said outer wick sleeve ically along said outer periphery of said lower sleeve of and mounted on said bottom wall with said cover, and an said cover for moving together applied on said actuating means responsive to oscillation and said extinguishing burner to upwardly move said cover in which the latter sleeves to an extinguishing position the air flowing towards coasts with said stop- to shut off the perforations in the exposed end of said wick through exposed end of said wick and said cover from contacting the exposed end of said wick. to confine oil vapor from said in claim 1, wherein 2. An oil burner as set forth a lever pivotable in a said actuating means comprises said lever bearing against vertical plane with one end of strand joining the the bottom of said cover, a flexible oscillation detector other end of said lever with an -12- 463553 i 68/72 including a weight connected to the othier end of said strand, said detector being normally mounted on said burner so that the-bearing end of said lever is maintained in the lower position to keep said cover and said extinguishing sleeve in the lowermost position under the influence of gravity and arranged to fall downward from the location in response to said oscillation applied on said burner so that the free end of said lever pivotally moves upwardly moving said cover and said extinguishing sleeve until they reach the extinguishing position. 3. An oil burner as set forth in claim 2, said oscillation detector including an auxiliary weight connected to said primary weight, said auxiliary weight being adjust- able relative to said primary weight so that the center of, gravity of said oscillation detector varies to thereby change the sensitivity of said burner relative to said oscillation. 4. An oil burner of the type having a wick arranged to move upwardly and downwardly for canbustion and extinguishment, coamprising an oil tank,- said wick immersed at its lower end in the oil within said oil tank, inner and outer wick sleeves arranged in a coaxial relationship to *each other to dispose said wick between them and secured to said oil tank, a stop positioned above the upper edges of said inner and outer wick sleeves to determine the uppermost position of said wick, an extinguishing sleeve slidable vertically along said outer periphery of said outer wick sleeve, a cover rotatably supported on the shoulder of said extinguishing sleeve, said cover having perforations pro- vided therethrough for arranging an air stream flowing to- 13 463553

4 5168/n

ward that end of said wick exposed from said outer wick

sleeve, a resilient means urging to upwardly move said

extinguishing sleeve together with said cover to the extinguishing

position, retaining means to releasably maintain said cover and said extinguishing sleeve in the lower normal position with

the compression of said resilient means, and driving means to rotatably drive said cover in response to oscillation applied to

said burner so that said retaining means is relased from retaining

said cover in the lower normal position to urge said

extinguishing sleeve together with said cover to upwardly move

to the extinguishing position in which said extinguishing sleeve coacts with said stop to shut off the air flowing towards the ex- posed end of said wick through the perforations in said cover

from contacting the exposed end of said wick and to confine oil

vapor from said exposed end of said wick. An oil burner as set forth in claim 4, said

rotatably driving means comprising an arm secured to said cover,

a lever pivotally mounted on said oil tank in a substantially

horizontal plane and spring loaded to urge said lever to be spaced away at one end from said arm, but close to said arm, a flexible

strand connected at one end to the other end of said lever

and oscillation detector including a weight connected to the other end of said strand, said wight being normally mounted on a flat

surface of the said burner so that said lever is spaced away from

said arm and arranged to fall down from the location under said

oscillation so that said other end of said lever pivotally moves to engage against said arm so as to rotate said cover until said

retaining means is released from retaining said cover in the

4635,53

45168/n lower normal position whereby said cover and said extinguishing sleeve upwardly move to said extinguishing position. 6. An oil burner as set forth in claim 4, said retaining-means comprising a plurality of retainers each including a hook engaging an edge of each of a corresponding slot of a plurality of slots provided in the bottom of said cover when said cover is in the lower normal position and rotatably displaced to the position in which said arm is closely spaced frm said one end of said lever. 7. An oil burner as set forth in claim 5, said oscillation detector including an auxiliary weight connected to said primary weight, said auxiliary weight being adjust-. able relative to said primary weight so that the center of, gravity of said oscillation detector varies to thereby change the sensitivity of said burner relative to said oscillation.

DATED this SECOND day of MAY, 1975. TOYOTOMI KOGYO CO., LTD.

Patent Attorneys for the Applicait SPRUSON FERGUSON

4635.53

4 5168 r2

FI6.!.

FI6. 2.'

45.1 68 f72 F16.3.

Ff6.4.

4 635. 53

4516 8 /7

SFIG.6.

4 635,53