US3910751A - Spark wheels, method of manufacturing spark wheels, and dies for use therein - Google Patents

Spark wheels, method of manufacturing spark wheels, and dies for use therein Download PDF

Info

Publication number
US3910751A
US3910751A US431062A US43106274A US3910751A US 3910751 A US3910751 A US 3910751A US 431062 A US431062 A US 431062A US 43106274 A US43106274 A US 43106274A US 3910751 A US3910751 A US 3910751A
Authority
US
United States
Prior art keywords
spark wheel
spark
raised
cutting teeth
wheel
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.)
Expired - Lifetime
Application number
US431062A
Other languages
English (en)
Inventor
Stephen P Chernock
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US431062A priority Critical patent/US3910751A/en
Priority to CA206,045A priority patent/CA1020763A/en
Priority to GB3420374A priority patent/GB1462296A/en
Priority to DE2438678A priority patent/DE2438678A1/de
Priority to FR7431427A priority patent/FR2256797B1/fr
Priority to US05/509,298 priority patent/US3953996A/en
Priority to BR8022/74A priority patent/BR7408022D0/pt
Priority to JP50004622A priority patent/JPS50101170A/ja
Application granted granted Critical
Publication of US3910751A publication Critical patent/US3910751A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F23Q2/34—Component parts or accessories
    • F23Q2/46—Friction wheels; Arrangement of friction wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B21H7/14—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons knurled articles

Definitions

  • the dies employed in the process of this invention must incorporate either a plurality of cutting edges which are spaced closely enough to prevent the spark wheel from bottoming out on the die during the rolling step or relief channels at the base of each cutting surface which prevent destruction of the abrasive spark wheel surface.
  • FIG 2 FIG. I
  • This invention relates to spark wheels for use in cigarette lighters and the like, and more particularly to a method for manufacturing the abrasive surface for the spark wheel and dies for use in the process.
  • a spark wheel In order to properly function, a spark wheel must incorporate an abrasive surface which, when rotated against a flint or similar pyrophoric material, will produce a spark to ignite a fuel-fed wick or jet of flammable gas.
  • abrasive surface As is well known in the art, before the abrasive surface can be formed, substantially parallel grooves must be formed in the cylindrical surface of the wheel blank at an acute angle to the sides of the wheel in order to provide the proper offset spacing for the cutting edges of the spark wheel.
  • the two well-known prior art methods for producing the desired abrasive surface for the spark wheel are chiseling and broaching.
  • the most commonly used prior art process is the chiseling process, in which the grooved spark wheel is rotated while a chiseling tool or blade reciprocatingly cuts into the peripheral surface of the spark wheel as the spark wheel is rotated about its central axis.
  • the chiseling process forms a plurality of substantially linearly arranged inclined teeth in the surface of the spark wheel. This, in combination with the grooves which have been previously cut into the spark wheel surface, produces the required abrasive surface for the spark wheel.
  • Another object of this invention is to produce a spark wheel of the above character by a process that reduces the handling time and substantially increases automation.
  • Another object of this invention is to produce a spark wheel of the above character efficiently and rapidly.
  • the principal manufacturing step in the process of this invention is rolling the grooved spark wheel blank between at least two dies through a sufficient number of revolutions to impart the desired abrasive surface to the spark wheel blank.
  • the forming edges of the dies should be either substantially parallel or at an acute angle to the central axis of the spark wheel.
  • the grooved spark wheel blank can be manufactured by any one of the various well-known methods.
  • a minimum of one revolution of the spark wheel across the roll-forming dies is employed in order to produce the desired abrasive surface on the peripheral surface of the spark wheel.
  • One die is stationary, while the second die advances, causing the spark wheel to advancingly rotate between the dies.
  • the desired abrasive surface of the spark wheel is formed by the cooperating efforts of both dies acting upon the same surface.
  • the cutting edges of the dies exceed the yield point of the spark wheels material, causing the peripheral surface to deform, producing sharp edges and burrs throughout the entire spark wheel surface. This cooperative, overlapping surface deformation caused by the two dies allows the spark wheel to be produced rapidly with minimum labor cost.
  • the spark wheel incorporates a plurality of raised teeth terminating with sharp edges and burrs at the highest point. Most of the teeth also incorporate a ramped, substantially flat top surface inclined upwardly toward the cutting edges and burrs. This unique surface construction after hardening, as is well known in the art, provides an extremely efficient spark wheel.
  • the spark wheel-forming teeth of the die incorporate sharp edges which are formed at the intersection of an inclined ramp surface and a steeper burr-forming surface.
  • the burr-forming surface has an included angle with a plane perpendicular to the die of no greater than 12. Also, it has been found that this burr-forming surface may be substantially perpendicular, having a zero degree angle, and if desired could be undercut.
  • the sharp edges of the die should be spaced apart from each other a distance which prevents the rotating spark wheel blank from bottoming out or reaching the base of the burrforming surface. If the spark wheel bottoms out, or reaches the bottom intersection of the ramp surface and the burr-forming surface, the cutting edges and burrs of the spark wheel would be destroyed.
  • the die teeth may be spaced apart a distance which allows the spark wheel to bottom out on the inner surface, provided an additional undercut is included at the bottom surface. It been found that this under-cut will prevent destruction of the sharp edges and burrs on the peripheral surface of the spark wheel, performing the same function as the more closely spaced die teeth discussed above.
  • any shaped die can be employed, namely a flat die or a cylindrical die.
  • the only requirement is that at least two dies must be employed and the spark wheel must rotate between the edges for a sufficient revolution that will impart the desired abrasive surface to the spark wheel.
  • the invention accordingly comprises the several steps and the relation of one or more such steps with respect to each of the others, and the apparatus embodying features of construction, combinations of elements and arrangements of parts which are adapted to effect such steps, all as exemplified in the following detailed disclosure, and the scope of the invention will be indicated in the claims.
  • FIG. 1 is a perspective view of a spark wheel manufactured by the process of this invention
  • FIG. 2 is a top plan view of the abrasive surface of the spark wheel of FIG. 1;
  • FIG. 3 is a perspective view of a spark wheel blank with substantially parallel grooves formed in its outer peripheral surface
  • FIG. 4 is a cross-sectional front elevation view of the spark wheel blank of FIG. 3 taken along lines 44 of FIG. 3;
  • FIG. 5 is a top plan cross-sectional view of a spark wheel being rolled between two dies
  • FIG. 6 is a greatly enlarged side elevation view of one embodiment of a die used in the rolling step of the process of this invention.
  • FIG. 7 is a greatly enlarged cross-sectional side elevation view of another embodiment of a die used in the rolling step of the process of this invention.
  • FIG. 8 is a perspective view of rolling and sparkwheel block feeding equipment employing another embodiment of a die for use in the process of this invention.
  • FIG. 9 is a perspective view of a groove and land forming tool for use in the process of this invention.
  • FIG. 10 is a cross-sectional elevation view of the forming tool of FIG. 9 taken along line l0l0 of FIG. 9.
  • Spark wheel 20 comprises an abrasive outer peripheral surface 22, substantially flat sides 23 and 24, and an axial hole 25 generally used for mounting the spark wheel on a lighter.
  • the surface of spark wheel 20 In order for a spark wheel to effectively produce a spark when repeatedly frictionally rotated against a flint, or similar pyrophoric material, the surface of spark wheel 20 must be very abrasive. As shown in FIGS. 1, 2 and 5, the preferred abrasive surface 22 of spark wheel 20 has a plurality of raised teeth 26, each of which incorporates an upstanding sharp edge or burr 28. As best seen in FIG. 5, most of the raised teeth 26 incorporates a ramped, substantially flat top surface 27 terminating with a sharp edge or burr 28. Since the sharp edge or burr 28 is the highest point on raised tooth 26, sharp edge or burr 28 performs the desired cutting action on the flint to cause the sparking effect.
  • This preferred surface construction is extremely important in providing a spark wheel that will effectively and efficiently perform its desired function.
  • each tooth 26 incorporates two intersecting planar surfaces with a cutting edge or burr 28 extending from this intersection line at an angle which is not coincident with a plane bisecting the included angle formed by the intersecting planar surfaces.
  • This surface construction is extremely important, since it increases the abrasive nature of surface 22, thereby providing an extremely effective spark wheel.
  • Prior art spark wheels have either a cutting edge formed on each tooth at the intersection of two planes by a chiseling action, or have a single burr extending laterally from the teeth. Furthermore, one of the intersecting planar surfaces of the prior art spark wheels either lies along a radius of the spark wheel or has a point of this exposed surface lying along a radius of the spark wheel. In the spark wheel of this invention, the included angle between the intersecting planar surfaces is larger than prior art spark wheels, thus producing an exposed surface that is not radial and does not have an exposed point lying along the radius of the spark wheel.
  • each raised tooth 26 or group of teeth must be laterally offset from the raised tooth or group of teeth directly in front. If this were not the case, spark wheel 20 would merely create a groove in the flint and rapidly become inoperative. As a result, substantially parallel grooves 30, which are at an acute angle to sides 23 and 24, are formed in the peripheral surface of spark wheel 20 prior to the formation of raised teeth 26 and burrs and cutting edges 28.
  • spark wheel 20 with grooves 30 and abrasive surface 22 provides a spark wheel which substantially eliminates flint rotation. Consequently, clean repeated cuts of the flint are provided without binding of the spark wheel on the flint.
  • FIGS. 3 and 4 the parallel grooves 30 formed in the peripheral surface of spark wheel 20 with lands 31 therebetween can best be seen.
  • the particular pitch or number of grooves formed in the peripheral surface is a matter of design choice. The only requirement, as discussed above, is that grooves 30 must be at an acute angle to sides 23 and 24 of spark wheel 20. In the preferred embodiment, between 10 and 20 grooves or starts are formed in spark Wheel 20. As shown in FIG. 4, a groove depth 32 of between 0.007 and 0.009 inches and a land width 34 of between 0.012 and 0.017 inches are preferred. However, a groove depth 32 of between about 0.002 and 0.020 inches and a land width 34 of between about 0.005 and 0.040 inches are effective. As is well known in the art, lands 31 are required since they provide the surface on which cutting teeth 26 are formed. The particular limitations indicated are merely design choices and in no way should be interpreted as limiting the scope of this invention.
  • land portions 31 and grooves 30 are simultaneously formed at the desired angular pitch in the peripheral surface of a spark wheel blank.
  • the grooves and land portions are either produced substantially parallel to the sides of the spark wheel blank or are produced in two separate steps.
  • the forming tool 35 for use in the process of this invention to simultaneously form grooves and lands is shown in FIGS. 9 and 10.
  • Forming tool 35 incorporates groove-forming edges 33 and land-forming surfaces 37. It has been found that cutting tool 35 produces effective spark wheel blanks with distance 41 between forming teeth 33 of between about 0.005 and 0.040 inches with a forming tooth height 39 of between about 0.002 and 0.020 inches.
  • Forming tool 35 is employed in an automatic screw machine and, in one fast and efficient step, the advancement of tool 35 into the peripheral surface of a spark wheel blank forms both the grooves and the land portions at the desired skew angle.
  • abrasive surface 22 of spark wheel is formed by rolling the grooved spark wheel blank between two cooperating dies 36 and 38, as shown in FIG. 5.
  • die 38 is stationary, while die 36 advances in the direction shown by arrow 40.
  • Spark wheel 20 is frictionally held between dies 36 and 38.
  • spark wheel 20 rotates counterclockwise, as shown by arrows 42, while also laterally advancing in the direction indicated by arrow 40.
  • any shaped die can be employed and, if desired, both dies can be in motion.
  • the only requirement is that the die teeth must form the abrasive surface 22 on spark wheel 20.
  • Spark wheel 20 can be rotated between the dies as many times as desired. However, it has been found that at least one complete revolution must be made in order to form the desired surface. In the preferred embodiment, between 2 and 3 revolutions of the spark wheel over the die surfaces are employed.
  • the spark wheelforming teeth of the two dies operate on the same surface of the spark wheel. This is completely different than any prior art process and produces an extremely abrasive spark wheel surface.
  • the spark 1 wheel-forming teeth of the die By designing the spark 1 wheel-forming teeth of the die to overlap their forming action on the same spark wheel surface, additional cutting teeth having sharp edges and burrs are formed. The result is a unique and extremely effective spark wheel.
  • dies 36 and 38 incorporate a plurality of spark wheel-forming teeth 46.
  • Each tooth 46 comprises an edge 48, a burr-forming surface 50, an inclined surface 52, and an inner groove 54.
  • burr-forming surface 50 of die 36 faces the opposite direction from burrforming surface 50 of die 38. This die orientation is contrary to the teaching of prior art rolling methods. However, it has been found that unless the burrforming surfaces of the two dies face in opposite directions, such as one towards the left and one towards the right, the desired abrasive surface on the spark wheel will not be produced. v
  • a grooved spark wheel blank is positioned between dies 36 and 38 by gravity feed equipment, as shown in FIG. 8.
  • die 36 advances in the direction of arrow 40, causing the grooved spark wheel blank to rotate counterclockwise, as shown by arrows 42, while also advancing in the direction of arrow 40.
  • spark wheel 20 reaches the end of its travel across teeth 46 of dies 36 and 38, spark wheel 20 drops into suitable receiving equipment, well known in the art, and die 36 returns to its original position ready to repeat the same operation.
  • die 36 reciprocatingly advances, causing a grooved spark wheel blank to have the desired abrasive surface formed thereon during each cycle, rapidly and efficiently with no manual labor required.
  • edges 48 of dies 36 and 38 are positioned and maintained apart a distance 44, which allows grooved spark wheel 20, that is engaged therebetween, to be rolled across dies 36 and 38. without bottoming out” on grooved surface 54. If dies 36 and 38 are too close together, the spark wheel surface will contact the grooved surface 54, causing cutting edges and burrs 28 to be broken off and rounded. This results in a spark wheel which does not cut the flint. As a result, it is important to maintain the particular distance 44 between dies 36 and 38, which will prevent bottoming out for that particular diameter spark wheel.
  • an extremely unique abrasive surface 22 is formed on the spark wheel 20.
  • the roll-forming process of this invention produces a plurality of sharp edges and burrs 28 throughout the entire peripheral surface of spark wheel 20. It is believed that during the rolling process, edges 48 of spark wheel-forming teeth 46 of dies 36 and 38 produce stress concentrations radially along the spark wheel which exceed the yield point of the spark wheel material. This causes the spark wheel surface to fracture and form sharp edges and burrs 28.
  • teeth 46 are forced into ramped top surface 27 of spark wheel 20, causing additional cutting edges and burrs 28 to be formed, after the entire surface of spark wheel has contacted at least one die.
  • This is diagrammatically represented in FIG. 5, where edges 48 of die 36 are shown forming additional cutting edges and burrs 28 on spark wheel 20 during the rolling process.
  • dies having identical pitch angles also produces this overlapping tooth-forming effect, since a 180 rotation of the spark wheel causes a reversal of the angle at which the cutting teeth on the spark wheel were initially formed.
  • a spark wheel which has a plurality of raised teeth randomly spaced through the peripheral surface of the wheel, while each raised tooth has a sharp cutting edge or burr. Furthermore, some of the raised teeth will have a ramp top surface extending up to the cutting edge or burr, while other teeth will not have the top surface.
  • This spark wheel has a unique abrasive surface construction not found in the prior art, which is very effective due to the plurality of cutting edges and burrs.
  • die 36 incorporates 32 teeth per inch with a left-hand helical orientation
  • die 38 incorporates 32 teeth per inch with a substantially straight orientation, substantially parallel to the axis of spark wheel 20.
  • burr-forming surface 50 has with a plane perpendicular to the die.
  • this included angle 61 is about 3, although angles between 0 and 12 have been found to be equally effective. If angle 61 is too great, burr-forming surface 50 of the dies will have the effect of dulling or rounding the cutting edge and burrs 28 as spark wheel 20 rotatingly advances beyond that particular tooth. As a result, it is important to control angle 61 in this embodiment of the die, maintaining it within the preferred limits. I
  • die 64 for use in the rolling process of this invention is shown in FIG. 7.
  • die 64 incorporates an edge 48, a burrforming surface 50, and an inclined surface 52.
  • the major variation in die 64 is the incorporation of a channel 66 at the base of surface 50 extending the entire length of surface 50. It has been found that by incorporating channel 66, dies 64 could be positioned more closely together than with dies 36 and 38 without fear of rounding or dulling cutting surfaces and burrs 28 by bottoming out.
  • channel 66 is about 0.006 inches wide and 0.010 inches deep.
  • the distance 44 between edges 48 need not be precisely controlled and the dis tance 60 between teeth 48 of the particular die can be substantially increased.
  • typical rolling and feeding equipment 70 is shown with another embodiment of a die 72 incorporated therein.
  • Rolling and feeding equipment 70 incorporates gravity feeding and holding means 74 for receiving spark wheel blanks 75 and positioning them in the proper orientation ready for gravity feed between the cooperating dies 72 and 76.
  • spark wheel blank 75 is dropped from holder 78 to a position between dies 72 and 74. Then, reciprocating die 76 advances in the direction of arrow 79, rotatingly advancing spark wheel blank 75 between cooperating dies 72 and 76. When die 76 has reached the end of its travel, the produced spark wheel is dropped into receiving means, not shown, and die 76 returns to the start position.
  • Die 72 is another embodiment of the dies of this invention. Die 72 incorporates two separate die surfaces 80 and 82. Die surface 80 comprises a plurality of teeth positioned for producing the desiredflat-topped grooved surface on the peripheral surface of spark wheel blank 75, while die 82 is similar to the dies discussed above for producing the desired abrasive surface.
  • the spark wheel blanks 75 for sue with this combination die can be quickly and easily produced, using stamping presses, headers, or screw machines, well known in the art.
  • a spark wheel can be produced in one fast and efficient step with a minimum labor requirement.
  • Die surface 80 quickly and efficiently imparts the desired flat-topped grooved surface having the desired orientation, while surface 82 provides the abrasive surface required for an effective spark wheel.
  • Die 76 which is shown in phantom, would incorporate cooperating die surfaces similar to surfaces 80 and 82 constructed in a manner which would cooperate with the particular rolling operation being performed at a particular time.
  • a spark wheel comprises an inclined ramped top portion extending to said terminating edge.
  • a spark wheel having a substantially cylindrical shape and comprising an abrasive peripheral surface a long-needed gap in the industry. As is obvious to one 5 having:
  • any spark wheel produced by the process of this invention must be hardened before being employed in a lighter.
  • the spark wheel material is employed during the production process is not hard enough to repeatedly cut the flint in a lighter and, as a result, must be hardened before being so used.
  • a spark wheel having a substantially right cylindrical shape incorporating an abrasive peripheral surface comprising:
  • one of said surfaces of said raised flint cutting teeth also A. a plurality of grooves forming lands therebetween at an acute angle to the sides of the wheel;
  • At least one of said rows of cutting teeth comprises a first orientation which crosses at least one of said rows of cutting teeth having a second orientation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Lighters Containing Fuel (AREA)
  • Milling Processes (AREA)
  • Forging (AREA)
US431062A 1974-01-07 1974-01-07 Spark wheels, method of manufacturing spark wheels, and dies for use therein Expired - Lifetime US3910751A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US431062A US3910751A (en) 1974-01-07 1974-01-07 Spark wheels, method of manufacturing spark wheels, and dies for use therein
CA206,045A CA1020763A (en) 1974-01-07 1974-07-31 Spark wheels, method of manufacturing spark wheels, and dies for use therein
GB3420374A GB1462296A (en) 1974-01-07 1974-08-02 Spark wheels method of manufacturing spark wheels and dies for use therein
DE2438678A DE2438678A1 (de) 1974-01-07 1974-08-12 Zuendraedchen sowie verfahren und werkzeuge zu seiner herstellung
FR7431427A FR2256797B1 (de) 1974-01-07 1974-09-17
US05/509,298 US3953996A (en) 1974-01-07 1974-09-25 Spark wheels, method of manufacturing spark wheels, and dies for use therein
BR8022/74A BR7408022D0 (pt) 1974-01-07 1974-09-27 Roda de fuzil seu processo de fabricacao e cunho de rolamento para sua fabricacao
JP50004622A JPS50101170A (de) 1974-01-07 1975-01-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US431062A US3910751A (en) 1974-01-07 1974-01-07 Spark wheels, method of manufacturing spark wheels, and dies for use therein

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/509,298 Division US3953996A (en) 1974-01-07 1974-09-25 Spark wheels, method of manufacturing spark wheels, and dies for use therein

Publications (1)

Publication Number Publication Date
US3910751A true US3910751A (en) 1975-10-07

Family

ID=23710278

Family Applications (1)

Application Number Title Priority Date Filing Date
US431062A Expired - Lifetime US3910751A (en) 1974-01-07 1974-01-07 Spark wheels, method of manufacturing spark wheels, and dies for use therein

Country Status (7)

Country Link
US (1) US3910751A (de)
JP (1) JPS50101170A (de)
BR (1) BR7408022D0 (de)
CA (1) CA1020763A (de)
DE (1) DE2438678A1 (de)
FR (1) FR2256797B1 (de)
GB (1) GB1462296A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027376A (en) * 1976-04-08 1977-06-07 Davenport Machine Tool Method for producing sparking wheels
US4509916A (en) * 1983-03-11 1985-04-09 Laforest, S.A. Devices for producing ignition sparks when falling on a pyrophoric flint
WO1998037365A3 (en) * 1997-02-10 1998-11-26 Bic Corp Reduced resistance device for producing ignition sparks
US6074198A (en) * 1996-07-30 2000-06-13 Cricket S.A. Gas lighter
US20160201906A1 (en) * 2013-12-17 2016-07-14 Long Chen Push-Button Type Flint Ignition Mechanism Capable of Automatic Resetting

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5671540A (en) * 1979-11-14 1981-06-15 Nissan Motor Co Ltd Rolling device
JPS60159518A (ja) * 1984-01-30 1985-08-21 Yoneda Seisakusho:Kk ライタ−用発火ヤスリの製造方法
CN109483465B (zh) * 2018-11-23 2020-10-16 中国航发南方工业有限公司 用于发动机涡轮盘拆解的部件及其制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455348A (en) * 1945-08-25 1948-12-07 Argus Inc Process of making sparking wheels
US2779179A (en) * 1952-12-02 1957-01-29 Scripto Inc Lighter
US3010856A (en) * 1957-05-08 1961-11-28 Chromalloy Corp Method of making an abradant element for spark generating device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455348A (en) * 1945-08-25 1948-12-07 Argus Inc Process of making sparking wheels
US2779179A (en) * 1952-12-02 1957-01-29 Scripto Inc Lighter
US3010856A (en) * 1957-05-08 1961-11-28 Chromalloy Corp Method of making an abradant element for spark generating device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027376A (en) * 1976-04-08 1977-06-07 Davenport Machine Tool Method for producing sparking wheels
US4509916A (en) * 1983-03-11 1985-04-09 Laforest, S.A. Devices for producing ignition sparks when falling on a pyrophoric flint
US6074198A (en) * 1996-07-30 2000-06-13 Cricket S.A. Gas lighter
WO1998037365A3 (en) * 1997-02-10 1998-11-26 Bic Corp Reduced resistance device for producing ignition sparks
US5993198A (en) * 1997-02-10 1999-11-30 Bic Corporation Reduced resistence device for producing ignition sparks
AU727234B2 (en) * 1997-02-10 2000-12-07 Bic Corporation Reduced resistance device for producing ignition sparks
KR100362442B1 (ko) * 1997-02-10 2002-11-23 빅 코포레이션 점화스파크를 발생시키기 위한 감소저항장치
US20160201906A1 (en) * 2013-12-17 2016-07-14 Long Chen Push-Button Type Flint Ignition Mechanism Capable of Automatic Resetting
US9909760B2 (en) * 2013-12-17 2018-03-06 Long Chen Push-button type flint ignition mechanism capable of automatic resetting

Also Published As

Publication number Publication date
BR7408022D0 (pt) 1975-09-16
FR2256797B1 (de) 1978-06-09
FR2256797A1 (de) 1975-08-01
JPS50101170A (de) 1975-08-11
DE2438678A1 (de) 1975-07-17
CA1020763A (en) 1977-11-15
GB1462296A (en) 1977-01-19

Similar Documents

Publication Publication Date Title
US3910751A (en) Spark wheels, method of manufacturing spark wheels, and dies for use therein
DE1265696B (de) Vorrichtung zum Herstellen von Rippenrohren
US3953996A (en) Spark wheels, method of manufacturing spark wheels, and dies for use therein
US3052146A (en) Slot perforating cutters
US2455348A (en) Process of making sparking wheels
US1724005A (en) Counterboring tool
US5404741A (en) Method and cutting tool for producing steel fibers
US4136597A (en) Drill screw and die for producing same
EP0090528B1 (de) Verfahren und Vorrichtung zum Herstellen von Sprengringen
GB2314594A (en) Apparatus for forming pockets of a roller cage, and cage produced therewith
FI78013B (fi) Saog och saett att framstaella densamma.
EP0382773B1 (de) Verfahren zur bearbeitung eines länglichen werkstückes und vorrichtung dazu
US3354768A (en) Rotary cutters for sheet material
US1579888A (en) Cutting tool
US2344954A (en) Milling cutter
US4027376A (en) Method for producing sparking wheels
EP1812189B1 (de) Rohrschneidemaschine
US2183689A (en) Thread forming mechanism
US4660453A (en) Circular knife and method of making same
US3237287A (en) Method for producing gears
US4325272A (en) Method of making saw blades
US3253115A (en) Welding stud
US1399525A (en) Process and machine for forming cutters
DE934214C (de) Walzvorrichtung zum Einkneifen von Einschnitten in Vierkantmetallstaebe
US3077127A (en) Method of making sheet metal files