US20040053179A1 - Gas lighting rods - Google Patents
Gas lighting rods Download PDFInfo
- Publication number
- US20040053179A1 US20040053179A1 US10/642,738 US64273803A US2004053179A1 US 20040053179 A1 US20040053179 A1 US 20040053179A1 US 64273803 A US64273803 A US 64273803A US 2004053179 A1 US2004053179 A1 US 2004053179A1
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- US
- United States
- Prior art keywords
- operating member
- gas
- safety
- operated
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000000994 depressogenic effect Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 210000005224 forefinger Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q2/00—Lighters containing fuel, e.g. for cigarettes
- F23Q2/28—Lighters characterised by electrical ignition of the fuel
- F23Q2/285—Lighters characterised by electrical ignition of the fuel with spark ignition
- F23Q2/287—Lighters characterised by electrical ignition of the fuel with spark ignition piezoelectric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q2/00—Lighters containing fuel, e.g. for cigarettes
- F23Q2/16—Lighters with gaseous fuel, e.g. the gas being stored in liquid phase
- F23Q2/164—Arrangements for preventing undesired ignition
Definitions
- the present invention relates to gas lighting rods.
- a gas lighting rod is a wand-like device used for lighting fires, comprising a source of gas and an operating member which, when manually pressed down, opens a gas flow path to the end of the device and, by means of a piezo-electric element, generates a spark for igniting the gas.
- the operating member is spring-loaded to return to its normal position after operation.
- the standard safety technique is to provide a spring-loaded safety member which has to be operated before the operating member can be operated; the safety member can be moved transversely to the operating member to release the operating member.
- the operating member moves generally longitudinally along the axis of the lighting rod, and the safety member thus moves transversely to the axis of the lighting rod.
- a gas lighting rod comprising a gas release valve and a piezo-electric lighting system both operated by a spring-loaded operating member, and a spring-loaded safety member which has to be operated to release the operating member, characterized in that the operating member is aligned transversely and the safety member comprises a pivoted lever having a lock/release arm extending generally along the axis of the operating member and interacting therewith and a control arm engaged on the other side of the pivot and from the opposite side of the lighting rod from the operating member.
- the end of the lock/release arm is preferably sloped such that its engagement with the operating member tends to urge it into the locked position if the user attempts to operate the operating member without first fully operating the safety member.
- This arm is also preferably substantially enclosed within the operating member.
- the spring force provided by the piezo spring may be enough to provide the required spring bias to the operating member so that an additional biasing spring for the operating member is not required.
- This arrangement has various structural advantages.
- the fact that the lock/release arm is substantially enclosed within the operating member means that even under the application of an extremely high force on the operating member, the safety member will remain effective to restrain movement of the operating member.
- the spring force on the safety member can be adjusted within wide limits without resulting in undue friction with the operating member.
- the system is virtually immune to the safety member taking up an intermediate state or position in which the operating member can be operated a second time without having to operate the safety member, as the safety member is biased from such a potential intermediate position towards the correct position.
- the arrangement also has the functional advantage that it is particularly easy and comfortable to operate. It can readily be held in the hand in such a way that the user's thumb falls comfortably onto the operating member on one side of the lighting rod and their forefinger on the control arm of the safety member on the opposite side (or possibly vice versa).
- the longitudinal arrangement of the operating member and the transverse arrangement of the safety member can make operation of the lighting rod awkward and inconvenient.
- FIG. 1 is a simplified view of the lighting rod from the side, with part of the casing removed, showing the normal state;
- FIGS. 2 and 3 are partial simplified views of two modifications of the lighting rod of FIG. 1.
- the main components of the lighting rod comprise an operating member 10 , a safety member 25 , a gas container 40 , a nozzle assembly 45 , and a casing 50 . Only those elements relevant for present purposes are shown, and in simplified form.
- the casing 50 is of the clam-shell type, consisting of two half-shells which are broadly mirror images of each other and fit together by pin and socket elements around their meeting edges.
- the drawing shows the lighting rod with the front half-shell removed so that the rear half-shell 51 is visible.
- This casing holds the other components in place. In particular, it holds the gas bottle 40 at the right-hand end and the nozzle assembly 45 at the left-hand end.
- the operating member 10 comprises a button 11 which has a bore 12 containing a piezo-electric mechanism comprising two elements 13 , 14 .
- the button 11 is urged into the upwards position, ie the position shown, by a spring 15 which engages in a bore (not shown) in the button and against a stop 52 formed as part of the half-shell 51 .
- the piezo spring also provides spring biasing force on the operating button 11 .
- the button 11 can be manually depressed against the force of the spring 15 , and the piezo spring, moving the piezo-electric mechanism 13 - 14 downwards.
- a lever 19 is located as shown, pivoted on a pivot bearing 53 formed as part of the casing 50 . This lever 19 engages the valve 41 of the gas bottle 40 . Downward movement of the piezo-electric mechanism 13 - 14 rotates the lever 19 anti-clockwise, so operating the valve 41 and releasing a flow of gas from the bottle 40 . This gas flows to the end of the nozzle assembly 45 .
- the movement of the piezo-electric mechanism 13 - 14 is limited by a stop 54 formed as part of the casing 50 . Further pressure on the button results in compression of the two elements 13 and 14 of the piezo-electric mechanism 13 - 14 together and the generation of a spark at the end of the nozzle assembly 45 . The compression of the piezo-electric elements occurs after the release of the gas flow, so the gas flow should have reached the end of the nozzle assembly by the time the spark is produced.
- the safety member 25 (shown partly in section) consists of two arms, a lock/release arm 26 and a control arm 27 . These two arms are joined to form an L shape.
- the vertex 28 of the L forms a pivot which pivots in a pivot bearing 55 formed as part of the casing 50 .
- the safety member 25 is urged anti-clockwise by a spring 29 , which engages with the inside of the control arm 27 and bears against the stop 52 formed as part of the casing 50 .
- the outside of the control arm 27 is normally substantially flush with the casing 50 , as shown.
- the lock/release arm 26 of the safety member 25 is contained within a bore 17 of the button 11 .
- This bore contains a projecting stop element 16 at its upper end, so that the bore 17 is wide in its lower part and narrow in its upper part.
- the top end 30 of the lock/release arm bears against this projecting element 16 as shown.
- the operating member is locked against movement.
- the lock/release arm 26 rotates clockwise. This brings its upper end 30 out of engagement with the projecting element 16 in the button 11 and into alignment with the upper part of the bore 17 .
- the button 11 is released for movement; this button can therefore be depressed, with the lock/release arm 26 of the safety member 25 moving up in the upper part of the bore 17 .
- the end 30 of the lock/release arm 26 of the safety member 25 is angled as shown, and the stop 16 in the bore 17 has a corresponding or greater angle.
- the button 11 can be depressed only if the safety catch has been fully operated. If the safety catch is not fully operated, ie if the end 30 of the lock/release arm 26 of the safety member 25 is not moved fully out of engagement with the stop 16 , then the slope on the end 30 of this arm and the angled surface of the stop 16 will result in any pressure on the button 11 tending to force the safety member back anti-clockwise into the locked position.
- the safety button 25 can be released.
- the arm 26 will then move back anti-clockwise about the pivot 53 , with its end pressing lightly against the side of the bore 17 .
- this button will rise back to the position shown.
- the end of the arm 30 will slide along the side of the bore 17 , with relatively low friction, until it reaches the projecting element 16 , when it will jump back into the position shown.
- FIG. 2 shows a modification of this arrangement; the same reference numerals are used for corresponding parts, with added “A”s where the parts have significantly different forms.
- a common type of piezo-electric mechanism 13 - 14 has a pair of projections 18 on one of the elements 13 - 14 .
- a piezo-electric mechanism of this form is used, with the projections 18 being oriented as shown.
- the lock-release arm 26 A of the safety member 25 A is arranged to engage with these projections 18 on the control rod 12 as shown.
- FIG. 3 shows a further modification of the FIG. 1 arrangement, again with the same reference numerals and with added “B”s where the parts have significantly different forms.
- the safety member is a lever 31 .
- This lever has a right-hand arm which is cranked to have an upward extension 26 which engages with the bore 17 and step 16 of the operating member 10 as before.
- the lever 31 is pivoted at 32 , and its left-hand arm extends horizontally beyond this pivot as shown.
- This safety member 31 is separate from the control or safety button 25 B, which has an extension at its left-hand end which engages with the left-hand end of the left-hand horizontal arm of the safety member.
- the spring 15 B which engages with the control button 10 engages at its other end with a stop 52 B on the casing 50 .
- the spring 29 B operates between the safety button 25 B and the right-hand part of the safety member 31 .
- FIGS. 2 and 3 can both be applied simultaneously to the arrangement of FIG. 1. It will also be apparent to persons skilled in the art that other modifications to the described embodiments are possible whilst still including the essential elements of the invention as defined by the appended claims.
Abstract
A gas lighting rod comprises a gas release valve (41) and a piezo-electric igniting system (14) both operated by a spring-loaded operating member (10), and a spring-loaded safety member (25) which has to be operated to release the operating member. The operating member (10) is aligned transversely and the safety member (25) comprises a pivoted lever having a lock/release arm (26) extending generally along the axis of the operating member (10) and interacting therewith and a control arm (27) engaged on the other side of the pivot (28, 55) and from the opposite side of the lighting rod from the operating member (10). The lock-release arm (26) is substantially enclosed within the operating member, and its end is sloped such that its engagement with the operating member (10) tends to urge it into the locked position if the user attempts to operate the operating member without first fully operating the safety member.
Description
- The present invention relates to gas lighting rods.
- A gas lighting rod is a wand-like device used for lighting fires, comprising a source of gas and an operating member which, when manually pressed down, opens a gas flow path to the end of the device and, by means of a piezo-electric element, generates a spark for igniting the gas. The operating member is spring-loaded to return to its normal position after operation. Various examples are described, for example, in U.S. Pat. No. 5,697,775 (Tokai).
- It is important to provide a safety mechanism, to reduce the chances of the device being operated by children. The standard safety technique is to provide a spring-loaded safety member which has to be operated before the operating member can be operated; the safety member can be moved transversely to the operating member to release the operating member. The operating member moves generally longitudinally along the axis of the lighting rod, and the safety member thus moves transversely to the axis of the lighting rod.
- We have found that this relationship between the operating and safety members has significant disadvantages. The application of a high force on the operating member is liable to cause distortion of the safety member such that the operating member becomes freed and can therefore move and cause ignition. The spring force on the safety member needs to be limited in order to limit friction with the operating member; if the spring force is too high, when the safety member is released and the operating member is operated, the latter may be blocked in an intermediate position. Further, in such an intermediate state or position, the operating member may not return fully to its normal position, so holding the safety member in the release position; the operating member can then be operated without the safety member having to be operated first to release it.
- According to the invention there is provided a gas lighting rod comprising a gas release valve and a piezo-electric lighting system both operated by a spring-loaded operating member, and a spring-loaded safety member which has to be operated to release the operating member, characterized in that the operating member is aligned transversely and the safety member comprises a pivoted lever having a lock/release arm extending generally along the axis of the operating member and interacting therewith and a control arm engaged on the other side of the pivot and from the opposite side of the lighting rod from the operating member.
- The end of the lock/release arm is preferably sloped such that its engagement with the operating member tends to urge it into the locked position if the user attempts to operate the operating member without first fully operating the safety member. This arm is also preferably substantially enclosed within the operating member.
- The spring force provided by the piezo spring may be enough to provide the required spring bias to the operating member so that an additional biasing spring for the operating member is not required.
- This arrangement has various structural advantages. The fact that the lock/release arm is substantially enclosed within the operating member means that even under the application of an extremely high force on the operating member, the safety member will remain effective to restrain movement of the operating member. The spring force on the safety member can be adjusted within wide limits without resulting in undue friction with the operating member. Further, the system is virtually immune to the safety member taking up an intermediate state or position in which the operating member can be operated a second time without having to operate the safety member, as the safety member is biased from such a potential intermediate position towards the correct position.
- The arrangement also has the functional advantage that it is particularly easy and comfortable to operate. It can readily be held in the hand in such a way that the user's thumb falls comfortably onto the operating member on one side of the lighting rod and their forefinger on the control arm of the safety member on the opposite side (or possibly vice versa). In contrast, in the prior art designs, the longitudinal arrangement of the operating member and the transverse arrangement of the safety member can make operation of the lighting rod awkward and inconvenient.
- A lighting rod embodying the invention will now be described, by way of example, with reference to the drawings, in which:
- FIG. 1 is a simplified view of the lighting rod from the side, with part of the casing removed, showing the normal state; and
- FIGS. 2 and 3 are partial simplified views of two modifications of the lighting rod of FIG. 1.
- Referring to FIG. 1, the main components of the lighting rod comprise an
operating member 10, asafety member 25, agas container 40, anozzle assembly 45, and acasing 50. Only those elements relevant for present purposes are shown, and in simplified form. - The
casing 50 is of the clam-shell type, consisting of two half-shells which are broadly mirror images of each other and fit together by pin and socket elements around their meeting edges. The drawing shows the lighting rod with the front half-shell removed so that the rear half-shell 51 is visible. This casing holds the other components in place. In particular, it holds thegas bottle 40 at the right-hand end and thenozzle assembly 45 at the left-hand end. - The
operating member 10 comprises abutton 11 which has abore 12 containing a piezo-electric mechanism comprising twoelements button 11 is urged into the upwards position, ie the position shown, by aspring 15 which engages in a bore (not shown) in the button and against astop 52 formed as part of the half-shell 51. The piezo spring (not shown) also provides spring biasing force on theoperating button 11. In an alternative embodiment which is not shown it is possible to provide theoperating button 11 without itsown spring 15 but in a way which relies entirely on the biasing force of the piezo spring (not shown). - The
button 11 can be manually depressed against the force of thespring 15, and the piezo spring, moving the piezo-electric mechanism 13-14 downwards. Alever 19 is located as shown, pivoted on a pivot bearing 53 formed as part of thecasing 50. Thislever 19 engages thevalve 41 of thegas bottle 40. Downward movement of the piezo-electric mechanism 13-14 rotates thelever 19 anti-clockwise, so operating thevalve 41 and releasing a flow of gas from thebottle 40. This gas flows to the end of thenozzle assembly 45. - The movement of the piezo-electric mechanism13-14 is limited by a
stop 54 formed as part of thecasing 50. Further pressure on the button results in compression of the twoelements nozzle assembly 45. The compression of the piezo-electric elements occurs after the release of the gas flow, so the gas flow should have reached the end of the nozzle assembly by the time the spark is produced. - The safety member25 (shown partly in section) consists of two arms, a lock/
release arm 26 and acontrol arm 27. These two arms are joined to form an L shape. Thevertex 28 of the L forms a pivot which pivots in a pivot bearing 55 formed as part of thecasing 50. Thesafety member 25 is urged anti-clockwise by aspring 29, which engages with the inside of thecontrol arm 27 and bears against thestop 52 formed as part of thecasing 50. The outside of thecontrol arm 27 is normally substantially flush with thecasing 50, as shown. - The lock/
release arm 26 of thesafety member 25 is contained within abore 17 of thebutton 11. This bore contains a projectingstop element 16 at its upper end, so that thebore 17 is wide in its lower part and narrow in its upper part. In the normal position of thesafety member 25, thetop end 30 of the lock/release arm bears against this projectingelement 16 as shown. As a result, the operating member is locked against movement. When the safety member is operated, however, by manual depression of thecontrol arm 27, the lock/release arm 26 rotates clockwise. This brings itsupper end 30 out of engagement with the projectingelement 16 in thebutton 11 and into alignment with the upper part of thebore 17. As a result, thebutton 11 is released for movement; this button can therefore be depressed, with the lock/release arm 26 of thesafety member 25 moving up in the upper part of thebore 17. - The
end 30 of the lock/release arm 26 of thesafety member 25 is angled as shown, and thestop 16 in thebore 17 has a corresponding or greater angle. As a result, thebutton 11 can be depressed only if the safety catch has been fully operated. If the safety catch is not fully operated, ie if theend 30 of the lock/release arm 26 of thesafety member 25 is not moved fully out of engagement with thestop 16, then the slope on theend 30 of this arm and the angled surface of thestop 16 will result in any pressure on thebutton 11 tending to force the safety member back anti-clockwise into the locked position. - After the
button 12 has been depressed, thesafety button 25 can be released. Thearm 26 will then move back anti-clockwise about thepivot 53, with its end pressing lightly against the side of thebore 17. When thebutton 10 is then released, this button will rise back to the position shown. The end of thearm 30 will slide along the side of thebore 17, with relatively low friction, until it reaches the projectingelement 16, when it will jump back into the position shown. - FIG. 2 shows a modification of this arrangement; the same reference numerals are used for corresponding parts, with added “A”s where the parts have significantly different forms. A common type of piezo-electric mechanism13-14 has a pair of
projections 18 on one of the elements 13-14. In the FIG. 2 arrangement, a piezo-electric mechanism of this form is used, with theprojections 18 being oriented as shown. The lock-release arm 26A of thesafety member 25A is arranged to engage with theseprojections 18 on thecontrol rod 12 as shown. - FIG. 3 shows a further modification of the FIG. 1 arrangement, again with the same reference numerals and with added “B”s where the parts have significantly different forms. In this arrangement, the safety member is a
lever 31. This lever has a right-hand arm which is cranked to have anupward extension 26 which engages with thebore 17 and step 16 of the operatingmember 10 as before. Thelever 31 is pivoted at 32, and its left-hand arm extends horizontally beyond this pivot as shown. Thissafety member 31 is separate from the control orsafety button 25B, which has an extension at its left-hand end which engages with the left-hand end of the left-hand horizontal arm of the safety member. - The
spring 15B which engages with thecontrol button 10 engages at its other end with astop 52B on thecasing 50. However, thespring 29B operates between thesafety button 25B and the right-hand part of thesafety member 31. - It is obvious that the modifications of FIGS. 2 and 3 can both be applied simultaneously to the arrangement of FIG. 1. It will also be apparent to persons skilled in the art that other modifications to the described embodiments are possible whilst still including the essential elements of the invention as defined by the appended claims.
Claims (9)
1. A gas lighting rod comprising a gas release valve and a piezoelectric igniting system, both operated by a spring-loaded operating member, and a spring-loaded safety member which has to be operated to release the operating member, wherein the operating member is arranged to move in a primarily transverse direction to the axis of the lighting rod but angled to include a subordinate longitudinal movement towards the gas release valve when operated.
2. A gas lighting rod according to claim 1 wherein the casing of the lighting rod includes a substantially straight portion through one end of which the operating member is accessible.
3. A gas lighting rod according to claim 2 wherein said substantially straight portion is substantially at right angles to the direction of movement of the operating member.
4. A gas lighting rod comprising a gas release valve and a piezoelectric igniting system, both operated by a spring-loaded operating member, and a spring-loaded safety member which has to be operated to release the operating member, wherein the piezoelectric igniting system includes a piezoelectric member which is carried on the operating member and engages against a fixed stop when the operating member is operated.
5. A gas lighting system according to claim 4 wherein the piezoelectric member is carried in a bore in the operating member.
6. A gas lighting system according to claim 4 wherein the operating member includes a bore for receiving a portion of the safety member.
7. A gas lighting system according to claim 4 wherein the piezoelectric member is carried in a first bore in the operating member and the operating member includes a second bore, substantially parallel to the first bore, for receiving a portion of the safety member.
8. A gas lighting rod according to claim 4 wherein the safety member engages against the piezoelectric member.
9. A gas lighting rod according to claim 4 including a lever one end of which controls the gas release valve and the other end of which engages with the piezoelectric member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/642,738 US20040053179A1 (en) | 1998-08-05 | 2003-08-19 | Gas lighting rods |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR98/10078 | 1998-08-05 | ||
FR9810078A FR2782151A1 (en) | 1998-08-05 | 1998-08-05 | GAS LIGHTER |
US09/646,222 US6688878B1 (en) | 1998-01-29 | 1999-04-06 | Gas lighting rods |
US10/642,738 US20040053179A1 (en) | 1998-08-05 | 2003-08-19 | Gas lighting rods |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB1999/000599 Continuation WO2000008387A1 (en) | 1998-01-29 | 1999-04-06 | Gas lighting rods |
US09/646,222 Continuation US6688878B1 (en) | 1998-01-29 | 1999-04-06 | Gas lighting rods |
Publications (1)
Publication Number | Publication Date |
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US20040053179A1 true US20040053179A1 (en) | 2004-03-18 |
Family
ID=31995642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/642,738 Abandoned US20040053179A1 (en) | 1998-08-05 | 2003-08-19 | Gas lighting rods |
Country Status (1)
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US (1) | US20040053179A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090092939A1 (en) * | 2007-10-03 | 2009-04-09 | Irwin Industrial Tool Company | Torch and canister |
US9734378B2 (en) | 2008-08-20 | 2017-08-15 | John Gibson Enterprises, Inc. | Portable biometric lighter |
US10502419B2 (en) | 2017-09-12 | 2019-12-10 | John Gibson Enterprises, Inc. | Portable biometric lighter |
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Cited By (6)
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US20090092939A1 (en) * | 2007-10-03 | 2009-04-09 | Irwin Industrial Tool Company | Torch and canister |
US9734378B2 (en) | 2008-08-20 | 2017-08-15 | John Gibson Enterprises, Inc. | Portable biometric lighter |
US9940499B2 (en) | 2008-08-20 | 2018-04-10 | John Gibson Enterprises, Inc. | Portable biometric lighter |
US10502419B2 (en) | 2017-09-12 | 2019-12-10 | John Gibson Enterprises, Inc. | Portable biometric lighter |
US10969102B2 (en) | 2017-09-12 | 2021-04-06 | John Gibson Enterprises, Inc. | Portable biometric lighter |
US11774096B2 (en) | 2017-09-12 | 2023-10-03 | John Gibson | Portable biometric lighter |
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