GB2259755A

GB2259755A - Double-flame cigarette lighter

Info

Publication number: GB2259755A
Application number: GB9219933A
Authority: GB
Inventors: Zhi-Lin Wang
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-09-19
Filing date: 1992-09-21
Publication date: 1993-03-24
Also published as: GB9219933D0

Abstract

A double-flame cigarette lighter comprises an outer case (11, 12, 13), a gas reservoir assembly 2, a wind-proof flame assembly 4, a regulating device for regulating the gas supply and a flame change-over mechanism 6 connected to an igniting device 3. When the igniting device 3 is pressed down a windproof flame is generated and when released the air supply to a mixing chamber 42 is stopped so that a visible flame is produced. In one embodiment the flame change over mechanism 6 is connected to a hood 8 on the mixing chamber 42 of the wind proof flame assembly 4 and the hood 8 controls opening and closing of air intake holes 421 to the mixing chamber 42. In a second embodiment a turbulence member is provided to control the turbulence of gas flowing out of the mixing chamber in a further embodiment the path connecting the gaseous fuel nozzle to the gas reservoir can be opened and closed depending on the desired flame. <IMAGE>

Description

DOUBLE-FLAME CIGARETTE LIGHTER The present invention relates to a cigarette lighter, and more particularly, to a cigarette lighter which can generate two different states of flame, visible and wind-proof flame, using combustible gas (such as butane) stored in a liquefied state.

According to functions of a cigarette lighter, there are two main types at present. One of them can produce visible flame like a candle light which is known as general type of cigarette lighter; the another one can generate a pale-blue flame through complete combustion of atomized butane thoroughly mixed with air under complete combustion which is known as a wind-proof cigarette lighter which can be further classified in detail. One of which is similar to a jet, a slender flame is ejected which is called jet type cigarette lighter. Another one generates a dispersed flame which is called wind-proof cigarette lighter.

There is only one gas supply conduit in a common visible flame cigarette lighter. The gas is ejected from the nozzle of gas supply conduit, a damping spring is usually provided at the nozzle.

The gaseous fuel will be burnt on the damping spring and the gas will burn directly in the air after igniting to form a visible flame like a candle light Therefore, it is usually called a visible cigarette lighter.

There is an atomizing system for wind-proof cigarette lighter of both jet flame type and dispersed flame type. The atomizing system comprises: an atomizer, a mixing chamber, a gas discharging head and a burner. It may further comprise: a re - igniting filament forming together of so called windproof flame assembly.A slight dif- ference in the construction of gas discharging head forthetwo.The condition for generating jet type flame is discharge of large amount of gas flowing from gas discharging conduit or central tube hole at the mid of gas discharging head Small amount of gas escaped through branch gas paths surrounding gas discharging conduit.

Whilst the condition for generating dispersed type flame is no gas discharging conduit or central tube hole at the mid of gas discharging head, or said conduit is blocked or there is only small amount of gas flowing out from said conduit, while large amount of gas flows out from branch gas paths surrounding gas discharging conduit.

Generally, a wind-proof cigarette lighter has a burner for combustion of gaseous fuel and air mixture. At the outlet on the upper portion of the burner, it is possible to install a re-igniting element made of high temperature resistant material such as pIatinum. Due to that the gaseous fuel and air is atomized and mixed beforehand, therefore, complete combustion is possible to generate a flame not quite visible but of very high temperature (incandescent state). The flame itself has certain capability of wind-proof.

When re-igniting element is installed, even if the flame is blown off by wind, the re- igniting element is still kept at very high temperature, therefore it will re-ignite the mixture of combustible gas and air ejected continuously under catalytic action The re-igniting element is an uninterrupting igniting device for the mixture of combustible gas and air ejected continuously.Hence, the goal of wind-proof is fulfilled The applicant's US patent No. 5055034 discloses a double flame cigarette lighter comprising: an outer case, a gas reservoir assembly composed of a gas reservoir, a gas charging valve mounted on the gas reservoir, a gas discharging valvewhoseamount of gas is adgust- able; a wind-proof assembly composed of an atomizer, a mixing chamber, a gas discharging head and a burner; an igniting device; a gas supply control mechanism acting on the gas discharging valve of the gas reservoir assembly and a flame change over device. Incor- porated with this cigarette lighter, there is also an atomizer for generating wind-proof flame, and a combustible gas conduit connected with gas reservoir and gaseous fuel ejecting nozzle of the burner or known as gas discharging outlet for generating visible flame. The gas discharging valve on the gas reservoir is a T-construction, the combustible gas discharged from gas reservoir through gas supply control mechanism will lead to the combustible gas conduit for generating visible flame and atomizer for generating windproof flame.For the purpose of generating two different types of flame, to avoid interference of visible flame and windproof flame in one burner, a gas discharging head construction is adopted as disclosed in the above-mentioned patent The construction has a cylindrical form, a horizontal arm seated on its upper end At the two sides of the arm are milled with two openings.Right above at the center of arm, there is a gaseous fuel nozzle with opening vertically upward The main problem of this type of cigarette lighter is that the igniting rate for visible flame is not high Now, the more effective method available is to increase the precision of machining parts so that the mutual coordination of parts constructively will precisely meet the design requirements. Moo ver, the igniting rate for the visible flame of a double flame cigarette lighter can be further increased by addition of technical means like double pole striking etc.. But the result will be increasing of cost, reducing yield rate of qualified products. This type of ciga-rette lighter also has the disadvantage of non - corn- pact construotion and cumbersome technologies involved during assembly.

The flame change over mechanism for changing over wind-proof and visible flame may connect one of its end to the above-mentioned valve set on the combustible gas conduit while its another end is the block projected outside of outer case of the cigarette lighter. Sliding upward or downward of this block will control the closing or conducting of the valve set on the visible flame gas supply conduit that is to control the change over of flames.

This device is not quite convenient in use. The user can not expect to lit the necessary flame selected at will by simply pressing once.

Besides, the user usually set the block to either wind-proof or visible flame position at first, then followed by pressing down the igniting device to ignite the wind-proof flame or visible flame.

Due to the reasons fully described above, the rate of ignition or rate of combustion for visible flame will not be very high It is quite inconvenient during musing.

The patent No. US-3580698 discloses a kind of simply producing visible cigarette lighter. The object of this invention is to provide a smaller size igniting device suitable for use in a cigarette lighter. The combustion conduit can generate mixed gas of combustible gas and air for igniting the visible flame in the combustion conduit. The construction of this type of combustion conduit cannot make the combustion of the mixed gas to form a stabilized wind-proof flame. In which, a set of special valve control system is needed to perform the ignition of the above-mentioned mixed gas. By means of ignited flame of mixed gas or more exactly a spark to progressively ignite the visible flame. This set of control mechanism can not easily vary or change over the state of flame.

The objxt of the present invention is to overcome the technological imperfection of prior art and to provide a simpler and more reasonable construction to get higher yield rate of qualified products which will be more adaptable for industrial batch produce tion. This should greatly improve the rate of igniting or rate of combustion as well as convenient in use to give a kind of double-flame cigarette lighter which will fully develop the advantages of double - flame cigarette lighter.

For the realization of the above-mentioned object in an embodiment of the present invention of double-flame cigarette lighter, it comprises: an outer case; a gas reservoir assembly composed of a gas reservoir, a gas charging valve, a gas discharging valve whose amount of gas is adjustable; an igniting device; a wind-proof flame assembly composed of an atomizer, a mixing chamber, a gas discharging head and a burner, a gas supply control mechanism acting on the gas discharging valve of gas reservoir assembly and a flame change over mechanism, wherein a hood is provided on the mixing chamber of wind-proof flame assembly, connecting to one end of the flame change over mechanism, by using this hood to control the close or conduct of air intake holes of the mixing chamber in the wind-proof flame assembly.

The alternative mentioned above may be realized on the basis of a common wind-proof cigarette lighter sold on market By closing or conducting the air intake holes of the mixing chamber of the wind-proof flame assembly, the combustible liquefied gas in the cigarette lighter passes through the discharging valve operated by gas sW mechanism, entering into atomizing chamber along gas path After the gas is atomized by ejection in the atomizing chamber, then the gas is led into mixing chamber. On the wall of mixing chamber, there are air intake holes leading to atmosphere.

Control the closing or conducting of these air intake holes by operation through flame change over mechanism to generate wind-proof or visible flame respectively. Under normal operating condition, the air intake holes are opened, cigarette lighter generates wind-proof flame or invisible flame. On closing the air intake holes, that is no mixing to be allowed Then there will be no state change of the ejected gas flow in the whole process. The cigarette lighter generate visible flame.

A second embodiment of the present invention of a double-flame cigarette lighter comprises: an outer case; a gas reservoir assembly composed of a gas reservoir, a gas charging valve, a gas discharging valve whose amount of gas is adjustable; an igniting device; a wind-proof assembly composed of an atomizer, a mixing chamber, a gas discharging head and a burner; a gas supply control mechanism acting on the gas discharging valve of the gas reservoir assembly; and a flame change over mechanism, wherein there is a turbulent member on the mixing chamber of the wind-proof flame assembly. One end of the flame change over mechanism is connected with the turbulent member. By entering or withdrawing of turbulent member to control the turbulence of ejected gas flow in the mixing chamber of the wind-proof assembly.

The above-mentioned alternative may be realized on the basis of common wind-proof cigarette lighter sold in market. A turbulent member is installed in the mixing chamber of wind-proof flame assembly. Using the flame change over mechanism to control the entering or withdrawing of turbulent member producing turbulence to ejected gas flow to form gas flow status adaptable to different kind of flames. Or, by setting the atomizing and mixing gas flow into turbulence by turbulent member to softening the atomizeed gas, then the cigarette lighter will generate visible flame. Under special case in using, the turbulent member will not be functionable.

The cigarette lighter generate wind-proof or invisible flame.

Double-flame can be realized in the above-mentioned two embodiments by means of a hood or turbulence generating member of simpler construction. Under this condition, there will be no interference between wind-proof flame and visible flame. Furthermore, the igniting device is connected with flame change over mechanism to change wind-proof flame into visible flame. Thus, the cigarette lighter will have simpler construction and a higher igniting rate for both wind-proof and visible flames which is quite suitable for industrial production in large batches.

A third embodiment of a double-flame cigarette lighter of the present invention comprises: an outer case; a gas reservoir assembly composed of a gas reservoir, a gas charging valve, a gas discharging valve whose amount of gas is adjustable; an igniting device; a wind-proof assembly composed of an atomizer, a mixing chamber and a burner; a gas supply control mechanism acting on the gas discharging valve of the gas reservoir assembly and a flame change over mechanism. At the top of said gas discharging head, there is a se s fuel nozzle with opening extending vertically upward.

Gaseous fuel nozzle is connected with gas reservoir. One end of the flame change over mechanism is a valve member acting on the path connecting gaseous fuel nozzle and gas reservoir, wherein the other end of flame change over mechanism is connected with actuating member of igniting device. When the actuating member of igniting device actuates, the cigarette lighter is ignited to form wind-proof flame. Upon releasing of actuating member, the gas supply control mechanism keeps to supply gas. Flame change over mechanism changes the status of combustible gas flow in the wind-proof assembly through conducting of the path connected between gaseous fuel nozzle and gas reservoir to change the flame into visible flame.

This embodiment is based on the double-flame cigarette lighter covered in the applicant's US patent No. US5055034 in which an igniting device is connected to flame change over mechanism.

Furthermore, when the igniting device is pressed down, this cigarette lighter will generate wind-proof flame. At this time, the rate of ignition is higher. Upon releasing of the igniting device will actuate the flame change over mechanism into action simultaneously to realize change overof flames, that is, change wind-proof flame into visible flame directly. Hence, higher igniting rate for visible flame is realized Also, it renders convenient to consumer. At the same time, in other words, it will reduce the precision requirement of each parts used for wind-proof flame assembly while increasing the yield rate of qualified products and the life expectancy of igniting device. This will greatly improve the potentiality and advantages of double cigarette lighter.

In the embodiments of the present invention, by taking advantage of pressing or releasing of igniting device to change over flame from wind-proof flame to visible flame or vice versa will have special important signifwlcance. It is very convenient in use and higher rate of ignition.

Brief description of the drawings: Fig. 1 is a detailed sectional view of general assembly of a double-flame cigarette lighter at standstill state according to the first embodiment of the present invention; Fig. 2 shows a partial sectional view of the cigarette lighter in Fig. L when generating wind-proof flame state; Fig. 3 shows a partial sectional view of the cigarette lighter in Fig. 1 when generating visible flame state; Fig. 4 shows a partial sectional view of a modified construc- tion of the first embodiment of the present invention when the cigarette lighter generate wind-proof flame state; Fig. 5 shows a partial sectional view of another modified construction of the first embodiment of the present invention when the cigarette lighter generates wind-proof flame state;; Fig. 6 shows a partial sectional view of a second embodiment of the present invention when generating wind-proof flame; Fig 7 shows a partial sectional view of a third embodiment of the present invention when generating wind-proof flame state; Fig 8 shows a partial sectional view of a modified construe tion of the third embodiment of the present invention when generating wind-proof flame state; Fig 9 shows a partial sectional view of another modified construction of the third embodiment of the present invention when generating wind-proof flame state; Fig 10 shows a partial sectional view of a further modified construction of the third embodiment of the present invention in generating wind-proof flame state;; Fig. shows a partial sectional view of a furthermore modi- fled construction of the third embodiment of the present invention in generating wind-proof flame state; Fig. 12 shows a constructional sketch of the wind-proof flame assembly and that in connecting with part of flame change over mechanism of the first embodiment of the present invention when the cigarette lighter is at the state of generating wind-proof flame; Fig. 13 shows a constructional sketch of the wind-proof flame assembly and that in connecting with part of flame change over mechanism of the third embodiment of the present invention when the cigarette lighter is at the state of generating visible flame;; Fig. 14 shows a constructional sketch of another modified wind-proof flame assembly and that in connecting with part of flame change over mechanism of the third embodiment of the present invention when the cigarette lighter is at state of generating visible flame; Fig. 15A, ISB shows respectively constructional sketch of first type of a wind-proof flame assembly of the first embodiment of the present invention when the cigarette lighter is at state of generating wind-proof and visible flame; Fig. 16A, 16B shows respectively constructional sketch of se cond type of a wind-proof flame assembly of the first embodiment of the present invention when the cigarette lighter is at state of generating windproof and visible flame;; Fig. 17A, 17B shows respectively constructional sketch of third type of a wind-proof flame assembly of the first embodiment ofthe present invention when the cigarette lighter is at state of generating wind-proof and visible flame; Fig. 18A, 18B shows respectively constructional sketch of fourth type of a wind-proof flame assembly of the first embodiment of the present invention when the cigarette lighter is at state of generating wind-proof and visible flame; Fig. 19A, 19B shows respectively constructional sketch of fifth type of a wind-proof flame assembly of the first embodiment of the present invention when the cigarette lighter is at state of generating wind-proof and visible flame;; Fig. 20A, 20B shows respectively constructional sketch of sixth type of a wind-proof flame assembly of the first embodiment of the present invention when the cigarette lighter is at state of generating wind-proof and visible flame; Fig. 21A, 21B shows respectively constructional sketch of seventh type of a wind-proof flame assembly of the first embodiment of the present invention when the cigarette lighter is at state of generating wind-proof and visible flame; Fig. 22A, 22B shows respectively constructiorial sketch of wind - proof flame assembly of the second embodiment of the present invention when the cigarette lighter is at state of generating wind-proof and visible flame;; Fig. 23 shows a sectional view of an integrated construction of wind-proof flame assembly of the third embodiment of the present invention; Fig 24 shows a sectional view at section 24-24 of Fig. 23; Fig. 25 shows a sectional view of gas flow limiting and equalizing mechanism The present invention will be described in detail with accompanying drawings as follows. Elements common to all the embodiments are described and illustrated using the same reference numerals.

With reference to Fig. I, the first embodiment of the present invention of a double flame cigarette lighter comprises: an outer case composed of a bottom shell 11, a middle sleeve 12 and a turn-up top cover 13; a lever part 14 of the top cover 13 being capable of turning about a pivot 15 which is inserted in the middled sleeve 12; between lever part 14 and middle sleeve 12 being provided a hook member 16 and a spring member 17 so that the cover 13 can be disposed either in a closed position as shown in Fig. 1 or in a opened position as shown in Figs. 2 and 3; within bottom shell 11 being provided a gas reservoir assembly 2 composed of a gas reservoir 21, a gas charging valve 22, a gas discharging valve 23 whose amount of gas is adjustable, on the bottom of gas reservoir 21 being mounted a gas charging valve 22, the gas reservoir 21 composed of a body 211 and a bottom cover 212, both are joined together by means of adhesion or welding (such as ultrasonic welding), the adjustment of gas discharging valve 23 on gas reservoir 21 being realized by means of adjusting rod 221, on the top of gas discharging valve 23 being provided a flange ring 231 which will set a gas supply control mechanism into action, the gas supply control mechanism may be a valve opening member 51, an outlet of the discharging valve 23 being connected to an inlet of a wind-proof flame assembly 4 through gas supply conduit 101; a wind-proof flame assembly 4 composed of an atomizer 41, a mixing chamber 42, a gas discharging head 43 and a burner 44, in said burner 44, an igniting member being usually provided; the atomIzer 41 and mixing chamber 42 may be integrated together to form a single unit, and movable upward or downward with respect tothe discharging head 43; the burner 44 being usually mounted on the top end of gas reservoir 21 and extending into the middle sleeve 12; an igniting device 3 belonging to piezoelectric type with its discharging electrode being led through the wall of the burner 44, which is used to ignite the combustible gas in the burner 44, one end of another conducting pressed-plate 32 being in contact with metallic bottom 33 of the igniting device 3, the other end of the conducting pressed-plate 32 being in contact with the wind-proof flame assembly 4 to form an electric discharging circuit; the combustible gas from gas reservoir 21 being led into atomizer 41, under the function of an atomizing plate in the atomizer 41, the fuel being atomized and ejected; a rubber seal ring being mounted in the atomizer 41; a number of air intake holes 421 being located on the mixing chamber 42 wherein air is led in thoroughly mixed with atomized ejection of combustible gas in the mixing chamber 42, then, gas mixture being led to gas discharging head 43, entering burner 44 through the gas discharging head 43; finally, gas mixture being ignited and burnt in the burner 44; a flame change over mechanism 6 composed of an actuating plate 61 which is mounted on wind-proof flame assembly 4 and a prqjected triggering plate 62 of an actuating member 31 of the igniting device 3, this projected triggering plate 62 may be incorporated together with said actuating member 31 to form a single unit.

Three different states are shown in the general assembly drawings Figs. 1, 2 and 3. The gas supply control mechanism 5 further comprises, besides valve opening member 51, a spring reed 52 for mutual coordinated actions. Said reed 52 is located on the body of gas reservoir 211. At standstill state as shown in Fig. 1 before the cover is turned up. One end of the valve opening member 51, neither opens gas discharging valve 23 nor in action with spring reed 52. As shown in Fig 2, when the top cover 13 is turned up, due to move-in of the hook member 16, the spring reed 52 also moves inward under stand-by state. Pressing down an actuating member 31 of the igniting device 3, the lower end of the actuating member 31 presses down the opening end of the valve opening member 51.Through the function of a fulcrum 53, the other end of valve opening member 51 tilting up the flange ring 231 of the gas discharging valve 23. When the gas discharging valve 23 opens, one end of the valve opening member 51 falls on a limiting hook 521 of the reed 52. In the meanwhile, triggering plate 62 on the actuating member 31 depresses an actuating plate 61 of the flame change over mechanism 6. Actuating plate 61 drives atomizer 41 and mixing chamber 42 downward Air intake holes 421 of the mixing chamber 42 can not be blocked by the wall of the gas discharging head 43. Combustible gas is fully atomized and mixed in the wind-proof flame assembly 4. At that time, the cigarette lighter is in the state of generating wind-proof flame.As shown in Fig. 3, when user releases the actuating member of the igniting device 3, valve opening member is hooked by the limiting hook 521 of the reed 52. Gas discharging valve keeps to discharge gas. Upon releasing of the actuating member 31 of the igniting device 3, the atomizer 41 and mixing chamber 42 of the wind-proof flame assembly 4 moves upward under the action of the spring 102.

Air intake holes 421 of the mixing chamber 42 enters into the wall of the discharging head 43, that is air intake holes 421 to be blocked by the wall of the gas discharging head Combustible gas can not be atomieed and mixed in the wind-proof flame assembly 4. At that time, cigarette lighter changes over to visible flame consequently at the extinguishing of wind-proof flame.

Close down the top cover 13 (Fig 1), lever part 14 of the top cover 13 turn around point 15, driving the hook member 16 outward (left) and presses on the reed 52 Limiting hook 521 on the reed 52 releases the valve opening member 51. Valve opening member 51 is released, gas discharging valve 23 is closed and the cigarette lighter return back to the state as shown in Fig. 1.

Fig. 4 is a modified construction for a double - flame cigarette lighter similar to Figs. L 2 and 3. The main difference lies at the actuating member of the igniting device 3. In this embodiment, using pushing type actuating member 31' to actuate the igniting de vice 3 and the flame change over mechanism 6 as well as the gas supply control mechanism 5. In this embodiment, flame change over mechanism 6 comprises: an extended hook plate 63 and an actuating plate 61 of the wind-proof flame assembly 4. Extended hook plate 63 is mounted on a servo-sleeve 35 of the actuating member 31 of the igniting device 3. The principle of action is similar to those shown in Figs. 1, 2 and 3.

Fig 5 discloses another construction of a double-flame cigarette lighter of the first embodiment of the present invention. A wind-proof flame assembly 4 is similar in principle with that shown in Figs. 1-4, in which the wedge type sliding block 67 is operated by an actuating member of the igniting device 3. Under the combined action of the wedge type sliding block 67 and the spring 103, blocking valve stem 805 will block or conduct the path between the atomizer 41 and the mixing chamber 42 to generate wind-proof flame or visible flame.

The following is detailed for both states of generating wind-proof flame and visible flame for wind-proof flame assem bly 4 with reference to singled out drawings Figs. 15, 16, 17, 18, 19, 20 and 21: One of the alternative for the purpose of providing a double-flame cigarette lighter of higher visible flame igniting rate with reasonable construction and suitable for batch production, is to provide a hood 8 on the wind-proof flame assembly. As mentioned above, it is known in the present invention that after combustible liquefied fuel passes the gas discharging valve 23 operated by the gas supply control mechanism 5 will flow along a gas supply conduit 101, atomized by the atomizer 41, and enters into the mixing chamber 42. On the mixing chamber 42 there is a number of air intake holes 421 which is controlled by the flame change mechanism 6 to close or conduct with result of generating combustible gas flow for visible or wind-proof flame correspondingly. Gas flow is ejected from conduit over the gas discharging head 43, enters to the burner 44, then it is ignited by the igniting device 3 to generate visible flame or wind-proof flame.

And, more particularly, there is a number of air intake holes on the mixing chamber 42. For generating wind-proof flame, the air intake holes 421 should be opened, and air is admitted through air intake holes 421 to meet the ejected flow from the atomizer 41, thoroughly atomized and mixed For generating visible flame, the air intake holes 421 should be closed by set and control the hood member 8 in motion relative to the mixing chamber 42 through the flame change over mechanism 6. This motion may be either sliding, rotating or any other closed type.

Diversified constructional forms are possible for hood 8, its function is to close the air intake holes 421 of the mixing chamber 42. Here, it is understood that the so called close is basically closing Technologically, it can not be made totally closed on one hand, and from results of numerous experiments, 95% closing for air intake holes 421 of the mixing chamber 42 is sufficient to generate visible flame.

With reference to Figs. 15 A and B, a construction with an atomizer 41 separated from the mixing chamber 42, air intake holes 421 of the mixing chamber is actually an interruption in an exposed space. Hood 8 in this embodiment is the inside wall of the mixing chamber 42. Let them to produce relative displacement for the purpose of opening and closing of the air intake holes. According to different conditions, hood 8 may be sewed by the wall of atomizer 41.

With reference to Figs. 16 A and B, hood 8 is a cylinder mounted at the outside wall of the mixing chamber 42. This cylinder will move following the flame change over mechanism 6 (as shown in Figs. 1-3) covering or opening air intake holes 421 of the mixing chamber 42. This motion may be sliding or rotating An embodiment with sliding motion is more adaptable to the present invention. In the drawing, there is an air vent 81 on the cylinder type hood 8. On the upper part of the hood 8 there is a shorter and smaller cylinder 83. Around the outside wall of lower end, there is a flange 84. The function of the flange 84 corre sponds to actuating plate 61 of the flame change over mechanism 6 (Figs. 1-3). A spring 102 is disposed under the flange 84. On the head of the gas discharging head 43, there is a central path 431 and by pass 432. The cylinder slides upward or downward.Gas discharging 431 on the gas discharging head 43 will be exposed to outside of the cylinder when it slides downward. Air intake holes 421 of the mixing chamber 42 meets the air vent 81 at the mid of the cylinder 8. At this time, air enters the mixing chamber 42 and mixes with the atomized gas forming wind-proof gas flow to generate a wind-proof flame.

Refer to Figs. 17 A and B, diversified construction of mounting the hood 8 on the mixing chamber are feasible. One of the outstanding embodiment is that hood 8 is the core tube 82 mounted in the mixing chamber 42. Core tube 82 may be moved to left or right by spring 84, along slots 422 on the upper and lower surface of the mixing chamber 42. Under normal conditions, core tube 82 is in alignment with central path 431 of the gas discharging head 43 and jet nozzle 414 on the atomizer 41. Combustible gas can be ejected directly from the gas discharging head 43 through the core tube 82 to generate visible flame. Under the action of the flame change over mechanism 6, core tube 82 is drawn away from normal position. Combustible gas is mixed with air coming from air intake holes 421 on the mixing chamber 42 to form a mixed gas flow for wind-proof flame.After releasing the change over mechanism 6, core tube 82 is resumed to normal position under the action of spring 84. On core tube 82 is welded a strip 65 of certain material such as mild steel wire. This wire is pro jected outside of the mixing chamber 4 One end of the wire 65 is attached on gas reservoir 21 (not shown in the figure). Upward or downward of a sliding block 64 which is a part of flame change over mechanism 6 will perform change over of visible or wind-proof flame.

Refer to Figs. 18 A, B and 19 A, B, hood 8 is the extension of outside wall of the gas discharging head 43. Air intake holes 421 are opened on the mixing chamber 4Z mixing chamber 42 is connected to the atomizer 41. Flame change over mechanism 6 (as shown in Figs. 1-3 ) acting on the mixing chamber 42 or atomizer 41. In this embodiment, by moving upward and downward an actuating plate 61 will set the mixing chamber 42 to move relative to the hood 8. Under the downward force, mixing chamber 42 slides downward relative to the hood 8. Air intake holes 421 on the mixing chamber 42 and by-pass 432 on the gas discharging head 43 are opened simultaneously. Air enters the mixing chamber 42 to form an ejected gas flow after mixing to generate wind-proof flame.The ejected flow mainly comes from the by-pass 432 on the gas discharging head 43 to generate wind-proof flame. On the contrary, when mixing chamber 42 and atomizer 41 move upward relative to outside wall of the gas discharging head 43, acting as the hood 8, it will close air intake holes 421, interrupting the mixing of air and combustible gas flow coming from the atomizer 41. In the mean time, gas flow from central path 431 of the gas discharging head 43 to the burner 44 to form visible flame. Generally, there is a spring 102 disposed under the atomizer 41.The minute difference in construction between Figs. 19 and 18 is the difference in construction of the gas discharging heads With reference to Figs. 20 A and B, hood 8 is a rod type piece prqjected into two air intakes 421 of the mixing chamber 4Z There is a passage 802 for combustible gas flow in the rod type piece. At appropriate position on the surface of two ends, an air duct 801 is made in coordination with air intake holes 421. Depending on the position of cylindrical surface of the rod type piece in coordination with air intake holes 421 to shut the air intake holes 421 of the mixing chamber 42, gas flows through the passage 802 and directly e.,iected from the gas discharging head 43 to produce visible flame.Under the action of flame change over mechanism, mutual action between the slanting side surface 85 at control end of the rod type piece with an actuating block 66 in the flame change over mechanism will give the rod type piece certain amount of displacement The air intake holes 421 of the mixing chamber 42 will be partially opened by the air duct 801 on the surface of the rod type piece. Air enters mixing chamber 42 and mixed with combustible gas to generate wind-proof name. When the actuating block 66 goes upward, the rod type piece retracts partially from air intake holes 421 in the mixing chamber 42 under the action of a spring 103. The cylindrical surface of the rod type piece doses air intake holes 421 of the mixing chamber 42. The gas flow ejected from the atomizer 41 will not be atomized and mixed, thus will generate visible flame.

With reference to Figs. 21 A and B, hood 8 may be in the form of a hollow cylinder sliding inside the wall of mixing chamber 42. At the top end of inside wall of the hollow cylinder, there is a shoulder 424 with a seal ring 425. The conical gas outlet 426 on top of the hollow cylinder is adapted with the gas discharging head 43. Gas conduit 401 under the atomizer 41 has a radial by-pass outlet 402. There is an annular gap 403 around outside wall of the atomizer 41 which can make conduct between conical gas outlet 426 and by-pass outlet 402 When the top of the atomizer 41 is in contact with shoulder 424 of the cylinder inside wall, the seal ring seals the annular slit 403.Through the joint action of the actuating plate 61 and spring 102, lift hood 8 upward, most part of the combustible gas from the gas conduit 401 will reach the conical gas outlet 426 through radial by-pass outlet 402 and annular slit 403. Finally, it is ejected from the gas discharging head 43. At this time, the air intake holes 421 of the mixing chamber 42 is shut by the hood 8. The cigarette lighter will give visible flame. On the contrary, pressing downward hood 8 when the top end of the atomizer 41 is in contact with the shoulder 424 inside the cylinder and the annular slit 403 is sealed by the seal ring 425. The combustible gas flow ejects from the atomizer 41. Air intake holes 421 of mixing chamber open, combustible gas is atomized and mixed Cigarette lighter gives wind-proof flame.

With reference to Fig 5, hood 8 is a blocking valve stem 805 similar to a needle valve, mounted on the atomizer 41. There is a by-pass 418 between the atomizer 41 and the hood 8 directly leading to the gas discharging head 43. When blocking valve stem 805 enters, air intake holes 421 of the mixing chamber 42 is at standstill, that is the air intake holes 421 corresponding to blocked state. By pressing down the actuating member 31 of the igniting device 3, driving a wedge shaped sliding block 67 downward, overcome the spring action of a spring 103. Thus, drawing out the blocking valve stem 805 which acts as hood 8. Due to the diameter of the mixing chamber 42 is larger than that of bypass 418, most of the gas flows into the mixing chamber 42 to mix with resulting of a combustible gas flow for generating wind-proof flame.

On releasing the pressing sleeve, the blocking valve stem 805 blocks the connecting path between atomizer Lil and mixing chamber 42 under spring action. Gas glows from the by-pass 418 toward the gas discharging head 43 to generate visible flame.

According to practical construction, the above-mentioned diversified hood construction will cause flame change over mechanism 6 to contact with hood 8 or actuating plate 61 etc.

Said contact may take the form of mutual connection or incorporation into a single piece, to set hood 8 into relative motion with the mixing chamber 42 and by utilizing hood 8 to close or conduct air intake holes 421 of the mixing chamber 42 for the purpose of generating wind-proof flame or visible flame.

To sum up, for diversified construction of wind-proof flame assembly, hood construction may vary correspondingly for the purpose of closing air intake holes 421 of the mixing chamber 112.

The air intake holes 421 of the mixing chamber 42 or air duct 801 of the hood 8 mentioned above may assume different constructional forms such as circular, elliptical or various kind of slot form.

In order to produce a visible flame like a candle flame, after the air intake holes of the mixing chamber have been shut by a hood, the combustible gas should be conducted to the central tube of the gas outlet, i.e. the by-pass of the gas outlet is to be closed. The constructions shown in Figs. 16, 17, 18, 19, and 21 can fulfil this task.

The second embodiment of the present invention is to set a turbulent member 7 in the mixing chamber 42 of the wind-proof flame assembly. A rod type piece is the best choice for the turbulent member 7, or a similar piece in strip or other suitable form, provided that its construction is appropriate to produce turbulence in mixing chamber 42. Combining the turbulent member 7 and the flame change over mechanism 6 together to form an integrated part that is displaceable or rotatable in the mixing chamber 42 will realise the purpose of turbulence. In connection with practical construction of the present invention, the first choice is the displaceable type.

Refer to Fig. 6 and Fig. 22 A and B, turbulent member 7 is rod-shaped, projected into the mixing chamber 42. The rod- shaped turbulent member slides in and out from the mixing chamber 4S One end of the flame change over mechanism 6 is connected with the turbulent member 7. Under certain condition, they may be incorporated together into one piece. Its presence or part of the turbulent member 7 situated somewhere around the center of ejected flow or adjacent thereof, it will generate turbulence to the ejected flow and modifying the jet. Thus, it will generate the required visible flame. In the figure, turbulent member 7 is operated and controlled by the flame change over mechanism 6.By de pressing the actuating member 31 of the igniting device 3, turbulent member 7 retracts from the centering position of the ejected flow in the mixing chamber 45 turbulent action is stopped Cigarette lighter generates wind-proof flame. On the contrary, upon releasing of actuating member 31 of the igniting device 3, the actuating member 31 of the igniting device 3 will make the turbulent member 7 to enter the mixing chamber 42 under the action of a spring 103.

The gas flow is softened to generate visible flame.

The above-mentioned flame change over mechanism is used to realize change over of visible flame and wind-proof flame, no matter what kind of alternative, using hood to block air intake holes or using turbulent method The flame change over mechanism may be made as a single unit, it may be a sliding block installed on the outer case, the other end of this block is used to control closing of hood or generating turbulence by turbulent member.

The better technological resolution for the recommended joint motion of the igniting device with the flame change over mechanism for changing over wind-proof flame and visible flame, using name change over mechanism to operate a hood for blocking air intake holes of the mixing chamber as recommended in the present invention is: One end of flame change over device acts on the hood on mixing chamber as mentioned above to set hood and mixing chamber in relative sliding or rotating motion. In this case, the word " acts" may be understood as contacts between separate members or incorporated together into a single piece for the purpose of blocking the air intake holes of the mixing chamber. Another end of said flame change over mechanism is positioned on the-actuating member of the igniting device.When the actuating member of the igniting device actuates, the cigarette lighter is ignited to produce wind-proof flame. Releasing of the actuating member, the gas supply control mechanism keeps to supply gas, the flame change over mechanism change the gaseous state of combustible gas in the wind-proof flame assembly to produce visible flame. The purpose of using such technological resolution is that the rate of igniting and rate of combustion of wind-proof flame are both very high. Speaking relatively, the rate of igniting visible flame is far less than wind-proof flame. Furthermore, one or two seconds after ignition of wind-proof flame will bring the burner to very high temperature. This temperature can be utilized completely and the re-igniting member of the wind-prOof assembly can also be utilized to change to visible flame after extinguishing of wind-proof flame. In this manner, it will generally improve the rate of combustion of visible flame. This will solve the problem of low igniting rate of visible flame successfully.

For change over visible flame and wind-proof flame by using a turbulent member of the flame change over mechanism to give turbulence of gas flow in the mixing chamber, one end of the flame change over mechanism acts on the above-mentioned turbulent mechanism Operating turbulent member in the mixing chamber to produce turbulence. Here, the word "acts" may be understood as contact of two separating member or incorporate together as a single piece. The purpose is to disturb gas flow in the mixing chamber. Another end of flame change over mechanism is positioned on the actuating member of the igniting device. When the actuating member of igniting device acts, the cigarette lighter is ignited to produce wind-proof flame. Upon releasing of the actuating member, the gas supply control mechanism keeps to supply gas.The flame change over mechanism changes the state of gas flow of the combustible gas, changes the wind-proof flame into visible flame.

Refer to Figs. 7, 8 and 9, particularly Fig. 7 for the realization of third embodiment on the basis of the applicant's patent No. US 5055034, to connect or actuate the actuating member 31 of the igniting device 3 of the flame change over mechanism 6.

Accordingly, a double -flame cigarette lighter of the third embodiment comprises: an outer case 1; a gas reservoir assembly 2 composed of a gas reservoir, a gas charging valve, a gas discharging valve whose amount of gas is adjustable; an igniting device 3; a wind-proof flame assembly 4 composed of an atomizer 41, a mixing chamber 42, a gas discharging head 43 and a burner 44; a gas supply control mechanism 5 acting on gas discharging valve 23 of gas reservoir assembly 2; and a flame change over mecha nism 6; at the top of the gas discharging head 43 a gaseous fuel nozzle 434 being provided and opening vertically upward; the gaseous fuel nozzle 434 being connected with the gas reservoir 21; one end of the flame change over mechanism 6 serving as a valve on connecting path between the gaseous fuel nozzle 434 and the gas reservoir 21; another end of the flame change over mechanism 6 being connected with the actuating member 31 of the igniting device 3. When the actuating member 31 of the igniting device 3 ao tuates, the cigarette lighter is ignited to produce wind-proof flame. Releasing of the actuating member 31, the gas supply control mechanism 5 keeps to supply gas. The flame change over mechanism 6 changes the state of combustible gas flow in the wind-proof flame assembly 4, and changes the flame into visible flame. The embodiments as illustrate in three figures, due to the passage formed by a soft tube 435 connecting the gaseous fuel nozzle 434 on the gas discharging head 44 and the gas reservoir 21, on account of the special feature of a soft tube, the valve device is greatly simplified to a certain kind of mechanism for squeezing the soft tube.In Figs. 7 and 8, the valve for the flame change over mechanism 6 and the valve opening member 51 of the gas supply control mechanism 5 are integrated together in one piece. The construction is very simple and satisfactory in application.

After depressing actuating member 31 of the igniting device 3, gas supply control mechanism 5 blocks the soft tube 435. Combustible gas is ejected from the gas discharging valve 23 to the mixing chamber 42 for atomizing and mixing. Then it is ejected from the gas discharging head 43 to generate wind-proof flame.

On the contrary, releasing of the actuating member 31, the soft tube 435 can conduct fluently, combustible gas may be elected directly from the soft tube 435 to the burner 44, ignited by the igniting device 3 to generate visible flame. In Fig. 7, the gas supply control mechanism S is a valve opening member 51 on actuating member 31 of the igniting device 3 connected with the gas supply control mechanism 5. Depressing the valve opening member 51 will tilt up the gas discharging valve 23 allowing the combustible gas to come out on one hand While it squeezes on the soft tube on the another hand At this time, the cigarette lighter will generate wind-proof flame.Releasing the valve opening member 51, the gas supply control mechanism keeps to supply gas due to the ao tion of limiting hook 521 of spring reed 52 in the gas supply control mechanism 5. The combustible gas in the gas reservoir 21 will pass through the soft tube 435 enters directly into the combustible gas nozzle 434 on the gas discharging head 43 in the wind-proof flame assembly 4. Cigarette lighter generates visible flame.

The construction of Fig. 8 is fundamentally similar to that of Fig. 7. The difference lies in igniting device, in Fig. 8 a pushing type actuating member 31 replaces the sleeve type actuating member 31.

In Fig. 9 the gas supply control mechanism S, besides the connection of the valve opening member 51 with the actuating member 31 of the igniting device, it further comprises: a wedge block 601, for the purpose of squeezing the soft tube 435 for blocking it through the wedge block 601. The wedge block 601 is connected with the actuating member 31 of the igniting device 3. Depending on the entering or withdrawing of the wedge block 601 in a slanting slot 201 on the body of the gas reservoir 211 to squeeze or release the soft tube 435 in the neighboring slot 202 to perform the change over of flames. From the figure, detail construction is illustrated For the above-mentioned construction, it is also possible to combine the soft tube 435 and wind-proof assembly 4 into an integrated valve.Thus it-will reduce the difficulties during assembly, increasing the yield rate of qualified product and productivity. Refer to Figs. 23 and 24, Fig. 24 is a sectional view along section 24 - 24. On the valve body there are first and second gas flow passages 4001, 4002. Top of the valve body is the gas discharging head 43. On that gas discharging head 43 there is a gaseous fuel nozzle 434 with an opening upward Nozzle 434 is connected with the second gas flow passage 4002. Under the valve body there is a gas supply conduit 101 connected with the gas discharging valve of the gas reservoir assembly. Between the gas conduit 101 and the gas discharging head 43 are the atomizer and mixing chamber combined to form the first gas flow passage. Said gas flow passage 4001 is always conducting with the valve chamber 4004. There is a by-pass 4003 between the gas conduit 101 and the atomizer.

The by pass 4003 leads to the valve chamber 4004. Inside the valve chamber 4004 is a valve core 4005, a spring 4007 is provided on the core. Valve closing member 4007 moves to left or right through the valve core 4005 to control conducting of the valve chamber 4004 with the second gas flow passage 400S The actuating block 66, as part of the flame change over mechanism, moves upward and downward under control of the igniting device.

When the block 66 is depressed downward, it presses the valve core 4005 entering through a supporter 4008, interrupted gas supply from the second gas flow passage 4002, cigarette lighter generates windfflroof flame. On the contrary, when the actuating block 66 goes upward exerting no force on the supporter 4008. Valve core 4005 moves rightward under the action of a spring 4006. Valve closing member 4007 opens the second gas flow passage 4002, then most of the combustible gas enters the gas discharging head 43 through the second gas flow passage 400S Cigarette lighter generates visible flame.

Further more, it is possible to add a flow limiting equalizer between the passage connecting the gaseous fuel nozzle 434 with the gas reservoir for the above-mentioned constructiom Refer to Figs. 23 and 25, the flow limiting equalizer comprises: a flow limiting plate 4010 with a flow limiting orifice 4009 or a flow limiting tube of similar constructiom The equivalent diameter of the flow passage of the flow limiting equalizer is 0.05-0.15 mm. The purpose of addition of the flow limiting plate 4010 is to equalize the gas supply in the first gas flow passage of the wind- proof flame assembly 4 and the second gas flow passage 4002 of the gas supply tube for visible flame. This makes the burner to generate a kind of wind-proof visible flame.That is the core of flame is visible while the surrounding flame is wind-proof, using wind-proof flame to protect visible flame, so that the visible flame has certain capability of wind-proof. When the cigarette lighter change over to visible flame state, it will generate visible flame of strong wind-proof capability. That means, due to the presence of flow limiting equalizer, visible flame has corresponding capability of wind-proof. In fact, in the construction shown in Fig. 23, it has already incorporated with the flow limiting equalizer at the visible flame tube side. In the disclosed embodiment shown in Figs. 7, 8 and 9, a flow limiting equalizer may be added to the soft tube 435 a kind of flame limiting equalizer with construction shown in Fig. 25, to realize the purpose of generating wind-proof visible flame.In the above - mentioned flow limiting equalizer there may have one or more micro holes. Only one such hole is better. The equivalent diameter of flows passing all micro holes should be fall within the limit of 0.05-0.15 mm which corresponds and meets the atomizing holes in the atomizer (generally 0.055-0.15 mm). For atomizing holes of diameter 0.055 mm, the equivalent flow diameter may be taken 0.05 mm. It is also possible to increase to 0.15 mm.. For atomizing holes of 0.15 mm, the equivalent flow diameter may be taken 0.15 mm or smaller down to 0.05 mm. The best choice is that the atomiting hole approximately equals to the equivalent flow diameter.The better choice of two diameters fall within 0.07-0.11 mm and even better for two diameters approximately to be equal to each other. In the above - mentioned flow limiting equalizer, it is better to provide a filter 4011. Filter 4011 should be placed on the upper stream of microholes to filter off the possible impurities involved Refer to Figs. 10 and 11, the constructions disclosed are basically the same as Figs. 8 and 9. The difference between them are: the soft tube in Figs. 10 and 11 are directly connected to the wall of the burner 44 or outside the wall of the burner 44. For that outside the wall, the problem of igniting visible flame should be considered. An alternative of better technological resolution is to provide certain size of flame conducting slot 444.In the two figures, visible flame tube can be arranged around the periphery of the burner according to construction; It can be seen from the introduction of cigarette lighter of dif fkent construction that whatever type of visible and wind-proof flame generating mechanism can be incorporated a flame change over mechanism acting in accordance with an igniting device. Depressing igniting device, ciirette lighter generates wind-proof flame; releasing of igniting device, the gas supply control mechanism keeps to supply gas. Cigarette lighter changes from wind-proof flame to visible flame naturally.

There are two types of igniting devices in use more popularly at present; piezo - electric igniting device and electronic type igniting device. With these two types of igniting devices, the following method may be adopted in connection with the operating of the flame change over mechanism for the realization of the change over of flame: The first method is to connect the other end of flame change over mechanism 6 with the actuating member of piezo-electric igniting device, see different constructions in Figs. 1-11, no matter so called actuating member is a pushing member shown in Figs. 5, 8 and 10 or a pressed type sleeve of piezo - electric type igniting device shown in remaining accompanying drawings.

The second method is to connect the other end of flame change over mechanism 6 with the switching device of an electronic igniting device 3', see constructions shown in Figs. 15 13 and 14.

In Fig. 12, a sliding block 611 acting on the wind-proof flame assembly 4 in one side and acts on the switching device of the eleo tronic igniting device 3' in another side to realize the change over of wind-proof flame into visible flame. The sliding block 611 extends off the outer case. In Fig. 13, it discloses the constructions of using the sliding block 611 to interrupt or loosen the soft tube 435 as well as actuating of the switching device of the electronic type igniting device 3w. In Fig. 14, a key 612 is used to replace the sliding block 611 in Fig. 13. There is a spring 613 installed between the key 612 and the outer case.

In realization of the above - mentioned flame change over func- tion, a set of the gas supply control mechanism 5 is equipped to keep supply of gas during the cigarette lighter being in working state. On the one hand it may adopt the alternative that supplying of gas at the moment of turn-up top cover, see Fig. 12. Such gas supply control mechanism S consists of a pull lever 501 and a horizontal lever 502.One end of pull lever 501 is connected to the lever part 14 on turn up cover 13 (refer to Figs. 1-3). Another end is in hinged connection with the horizontal lever SOZ Horizontal lever 502 is located right under the gas discharging valve 23, while the other end of the horizontal lever 502 is hinged to the gas reservoir body 211 of the gas reservoir assembly z On the another hand, turn up the top cover simply means it is ready to supply gas. After the first ignition, the gas discharging valve 23 opens and keeps to supply gas. Such kind of construction of the gas supply control mechanism can be seen in Figs. 1-11 and from the detailed descriptions for Figs. 1-3.

To sum up a double-flame cigarette lighter as mentioned above, the igniting rate or combustion rate is greatly improved due to the relative motion of a hood and mixing chamber or actuating a turbulent member operated by the flame change over mechanism. And, it can offer multiple flames in a single lighter through simple control of change over action Thus, - markedly extends the function of a wind-proof lighter. A double-flame cigarette lighter of the present invention also has the advantage of compact and rea sonable construction, simplified technologies involved in production and assembly. Hence, it is quite suitable for industrial production in large batches.

Due to the double-flame cigarette lighter of the present invention commonly use piezo-electric porcelain as igniting device, practical experience reveals such kind of igniting device is very appropriate for use. Through detailed description above, the essence of present practical new pattern is the adoption of integrated motion of a flame change over mechanism through igniting device.

The action of an igniting device may be a kind of depressing or change over through mechanical transmission into a kind of pushing form. Even such kind of varieties should also be included within the scope of the present invention Therefore, in the claims the depressing of an igniting device should be understood in its broader sense.

Claims

Claims:

1. A double-flame cigarette lighter comprising: an outer case; a gas reservoir assembly composed of a gas reservoir, a gas charging valve, a gas discharging valve whose gas amount is a4just- able; an igniting device; a wind-proof flame assembly composed of an atomizer, a mixing chamber, a gas discharging head and a burner; a gas supply control mechanism acting on the gas discharging valve of gas reservoir assembly; and a flame change over mechanism; wherein the improvement comprises: a hood is provided on the mixing chamber of the wind-proof flame assembly; one end of said flame change over mechanism being connected to the hood, by using the hood to control dosing or conducting of a number of air intake holes of said mixing chamber in said wind-proof flame assembly.

2. A double-flame cigarette lighter as set forth in claim 1, wherein said hood is the wall of the gas discharging head; and said mixing chamber is interconnected with said atomizer, moving relatively to said gas discharging head.

3. A double-flame cigarette lighter as set forth in claim 1, wherein said hood is a hollow cylinder which may slide along the inside wall of the mixing chamber; a shoulder being provided on the top of inside wall of said hollow cylinder, a conical gas outlet in coordination with said gas discharging head being also provided on the top of said hollow cylinder; a gas flow conduit which has acomprises: radial by-pass being provided right under said atomizer; an annular duct communicating with said gas outlet and said radial by-pass being provided at the outside wall of said atomizer; the top of atomizer being in contact with the shoulder inside the wall of said hollow cylinder, said annular duct being sealed by the seal ing ring.

4. A double-flame cigarette lighter as set forth in claim 1, wherein the other end of said flame change over mechanism is connected to an actuating member of the igniting device; when said actuating member of said igniting device actuates, the cigarette lighter is ignited; on releasing the actuating member, said gas supply control mechanism keeping to supply gas and said flame change over mechanism will drive said hood to block the air intake holes of said mixing chamber, changing over the state of combustible gas flow in wind-proof flame assembly to transform flame into visible flame.

5. A double - flame cigarette lighter comprising: an outer case; a gas reservoir assembly composed of a gas reservoir, a gas charging valve, a gas discharging valve whose gas amount is adjust- able; an igniting device; a wind-proof flame assembly composed of an atomizer, a mixing chamber, a gas discharging head and a burner, a gas supply control mechanism acting on the gas discharging valve of said gas reservoir assembly; and a flame change over mechanism, wherein the improvement comprises: a turbulent member is installed in the mixing chamber of the wind-proof flame assembly; one end of the flame change over mechanism being connected to said turbulent member; by using entering of withdrawal of said turbulent member to control the turbulence of eJected gas flow in the mixing chamber of the wind-proof flame assembly.

6. A double-flame cigarette lighter as set forth in claim 5, wherein said turbulent member is a rod- shaped piece, and said rod-shaped piece sliding in and out of the mixing chamber.

7. A double-flame cigarette lighter as set forth in claim 5, wherein the other end of said flame change over mechanism is connected with actuating member of the igniting device; when said actuating member of the igniting device actuates, the cigarette lighter is ignited; on releasing said actuating member, the gas supply control mechanism keeping to supply gas; by using said turbulence member sliding in and out of the mixing chamber, said flame change over mechanism will change the state of gas flow of combustible gas to transform flame into visible flame.

8. A double-flame cigarette lighter comprising: an outer case; a gas reservoir assembly composed of a gas reservoir, a gas charging valve, a gas discharging valve whose amount of gas is suitable; an igniting device; a wind-proof flame assembly composed of an atomizer, a mixing chamber, a gas discharging head and a burner; a gas supply control mechanism acting on the gas discharging valve of said gas reservoir assembly; a flame change over mechanism; a gaseous fuel nozzle opening vertically upward on the top of said gas discharging head; said gaseous fuel nozzle being connected with said gas reservoir; one end of said flame change over mechanism acting as a valve member on the connected path between gaseous fuel nozzle and gas reservoir, wherein the improvement comprises:: the another end of said flame change over mechanism is connected to an actuating member of the igniting device, when said actuating member of the igniting device actuates, the cigarette lighter is ignited to form wind-proof flame; on releasing said actuating member, the gas supply control mechanism keeping to supply gas; by using interruption or conduction of the connected path between the gaseous fuel nozzle and the gas reservoir, said flame change over mechanism will change the state of combustible gaseous flow in wind-proof flame assembly to transform the flame into visible flame.

9. A double-flame cigarette lighter as set forth in claim 8, wherein a soft tube for conducting gas is connected between the gaseous fuel nozzle and the gas reservoir, and said valve member is the valve opening member or wedge block for squeezing said soft tube.

10. A double-flame cigarette lighter as set forth in claim 8, wherein on the valve body of said valve member having first and second gas flow path, a gas discharging head being provided on the top end of the valve body, a gaseous fuel nozzle opening vertically up ward on said gas discharging head, said nozzle being connected with the second gas flow path, at bottom of the valve body being located the gas supply conduit connected with the gas discharging valve of the gas reservoir assembly, while that between the sup plying conduit and the gas discharging head forming the first gas flow path consisting of an atomizer and a mixing chamber, between the gas supplying conduit and the atomizer being a by-pass, and said bypass being connected to second gas flow path through valve chamber.

11. A double-flame cigarette lighter as set forth in claim 9 or 10, wherein on the path connected in between said gaseous fuel nozzle and gas reservoir is a flow limiting orifice and an orifice plate, the equivalent diameter of flow path being 0.05-0.15 mm

12. A double-flame cigarette lighter as set forth in claim 1 or 5 or 8, wherein said gas supply control mechanism comprises: a valve opening member and a spring reed, said spring reed being connected to the outer case or the gas reservoir of said gas reservoir assembly; a hook being incorporated on the spring reed, and said valve opening member acting in coordination with said spring reed

13. A double-flame cigarette lighter as set forth in claim 4 or 7 or 8, wherein another end of said flame change over mechanism is connected with a pressed type sleeve of a piezo electric igniting device.

14. A double-flame cigarette lighter as set forth in claim 4 or 7 or 8, wherein another end of said flame change over mechanism is connected with a switch of the igniting device.

15. A double-flame cigarette lighter comprising: an outer case; a gas reservoir - assembly composed of a gas reservoir, a gas discharging valve whose gas amount is adjustable; an igniting device; a wind-proof assembly composed of an atomizer, a mixing chamber, a gas discharging head and a burner; a gas supply controf mechanism acting on the gas discharging valve of the gas reservoir assembly; and a flame change over mechanism; wherein the improvement comprises: one end of said flame change over mechanism is connected with an actuating member of the igniting device; when said actuating member of the igniting device actuates, the cigarette lighter is ignited to form wind-proof flame, on releasing the actuating member, visible flame is formed.

16. A double-flame cigarette lighter substantially as hereinbefore described with reference to, and as shown in, figures 1 to 5, 12, 15A and 15B to 21A and 21B, or figures 6, 22A and 22B, or figures 7 to 11, 13, ill, 23 and 24 of the accompanying drawings.