US3793561A - Piezoelectric gas lighter - Google Patents

Piezoelectric gas lighter Download PDF

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Publication number
US3793561A
US3793561A US00315419A US3793561DA US3793561A US 3793561 A US3793561 A US 3793561A US 00315419 A US00315419 A US 00315419A US 3793561D A US3793561D A US 3793561DA US 3793561 A US3793561 A US 3793561A
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United States
Prior art keywords
striking
movement
spring
movable member
push button
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Expired - Lifetime
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US00315419A
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English (en)
Inventor
S Lundh
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SWELEX TEKNIK AB
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SWELEX TEKNIK AB
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Publication of US3793561A publication Critical patent/US3793561A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q3/00—Igniters using electrically-produced sparks
    • F23Q3/002—Igniters using electrically-produced sparks using piezoelectric elements

Definitions

  • PIEZOELECTRIC GAS LIGHTER My invention relates to gas lighters of the kind which employ a piezoelectric crystal or element and manually operable striking mechanism to deform the element to produce an electric spark to ignite a combustible gas.
  • An object of my invention is to provide a small, well functioning and cheap lighter arrangement for all types of combustible gases.
  • the lighter shall function during very long time without any service, such as reloading or exchange of worn-out parts. It must further be moisture-safe and stand exterior stresses without the vital parts of the lighter being damaged.
  • the lighting spark is obtained from a piezoelectric element which can be ofa kindknown per se and which is actuated by an impacing mechanism.
  • a piezoelectric element which can be ofa kindknown per se and which is actuated by an impacing mechanism.
  • a push button which is so placed at the lighter that this can be done by a finger
  • a spring-loaded hammer placed inside the push button is loaded and released when the push button is fully pressed in'and makes a stroke on the impact-receiving part of the piezoelectric element. Then the pressure change is received which is required for the element to generate a piezoelectric current sufficient for producing a lighting sparkv over the spark gap of the lighter.
  • FIG. 1 shows a longitudinal section through the impacting mechanism of the lighter in inactive position and the arrangement of the piezoelectric element in relation to the impacting mechanism;
  • FIG. 2 shows the same lighter turned 90 about the longitudinal axis and the push button pressed in to the releasing position
  • FIG. 3 shows the lighter of FIGS. 1 and 2 embodied in a separate hand lighter unit
  • FIG. 4 is a fragmentary view of parts shown in FIG. 3 illustrating a modification of the invention.
  • the lighter of FIG. 1 comprises a tubular outer sleeve 1 which contains a piezoelectric element 2, the front impact-receiving end'thereof having a protruding part and being centered in the sleeve I by a shallow washer 3.
  • the shallow shape of the washer 3 makes it possible for the'other end of the piezoelectric element to deviate from the center line as much as the free space between the element and the sleeve without any stress upon the impact-receiving part of the element.
  • the element end rests on a T-shaped bracket 9, which is attached to the sleeve 1 in two rectangular holes la in the sleeve wall.
  • the brakcet 9 is fixed after mounting by riveting or bending of the ends of the transverse part of the bracket which extends outside the sleeve.
  • the mass of the sleeve will act as a recoil suppressor for the bracket of the element.
  • Good electric contact between the two ends of the piezoelectric element and the material is essential, because these form one pole of the element and an insulated conductor 10 the other pole.
  • the return spring 6 can therefore be made with a small spring power sufficient to return the push button 8 to the starting position.
  • the push button 8 is prevented from-sliding out of the sleeve 1 by having two different diameters, the larger diameter part forming a guide in the sleeve 1, one end of which is folded inwards to an inner diameter which is somewhat larger than the smaller diameter of the push button.
  • the embodiment described permits relatively large tolerances of the length of the parts, because differences are compensated by the return spring 6.
  • the push button 8 has a bore in which the striking spring 7 can easily move. At theentrance the bore is conical and at the bottom it has a somewhat smaller diameter than the striking spring 7. The end turn of the spring 7 therefore will stick to the button in the bottom of the bore when the push button is pressed in.
  • the striking spring 7 is arc-shaped so as to make the part of the spring outside the push button deviate from the center line in relation to the inner sleeve 4.
  • the striking hammer 5 is attached to the striking spring by a flange 50' between the head and the shaft of the hammer and has a diameter somewhat larger than the inner diameter of the striking spring. If the shaft of the hammer 5 is pressed into the striking spring 7, the end turn of the spring when it is pressed to the hammer will creep over the said flange and thereby the hammer is prevented from sliding out of the spring.
  • the striking hammer 5 When the push button 8 is pressed in, the striking hammer 5 will slide forward and rest on the front edge of the inner sleeve 4 because the hammer is displaced from the center line by the arcuate shape of the striking spring 7.
  • the hammer During the compressing movement the hammer will stay resting on the edge of the sleeve 4 since the contact point is displaced in relation-to the center line.
  • the conical inside part of the button moves the hammer in the direction to the center line.
  • the hammer 5 has a conical shape corresponding to the conical part of the button 8. Since it is desirable to have the contact point for keeping the hammer as far as possible from the center, the contact surface of the hammer can be spherical (not shown).
  • the contact surface of the hammer can be spherical (not shown).
  • the holding point can move around the edges of the inner sleeve and the hammer by turning the button or by the turning which occurs at the compression of the striking spring 7, which will extend the life of the mechanism.
  • the hand lighter unit shown in FIG. 3 which embodies the lighter of FIGS. 1 and 2, will be described in the following. It is intended for use with gas operated heating apparatus, such as, for example, welding units, LP- burners and gas stoves.
  • the hand lighter unit in FIG. 3 is shown partly in section to illustrate the conductor 10 and the attachment of the electrode 34 thereto.
  • the spark-producing means described above and shown in FIGS. 1 and 2 is employed.
  • the negative electrode is shaped as a casing 31 having an opening for the conductor 10 bent toward the lighter mechanism and parts abutting the sleeve 1 and electrically connected thereto.
  • the casing is fixed in the longitudinal direction by the bracket 9, which is formed as a loop and has an end with an angular part which is inserted into the rear part of the casing in the rectangular hole.
  • the casing is'kept in its place by a sleeve 32 pushed over the casing and the mechanism.
  • the casing is not parallel to the mechanism but is at a somewhat larger distance from the center line of the mechanism at the electrode side than at the bracket 9 side.
  • the front end of the casing 31 is extended and shaped as a'pipe with a larger diameter part forming the lighter head, in which insulation 33 and the electrode 34 are disposed.
  • the conductor 10 is placed in the pipe and extends to the insulation 33, which is in the shape of a pipe and formed by heat-resistant, non-conductive material.
  • the lighter head can be changed in the manner shown in FIG. 4.
  • the lighter head 35 is extended so that the insulation 33a and the electrode 340 are disposed inside the opening of the lighter head.
  • the spark gap is formed between the electrode 34a situated in the center 'and radially out to 5 d.
  • e. striking means comprising a hammer for imparting a hammer blow upon said element means
  • elongated compressible spring means to effect movement of said striking means in a path ofmovement toward said element means, said spring means being compressible from an inactive position to an active position by movement of said member from its outer to its inner position, the rear end portion of said spring means being anchored to said movable member, said striking means being movably carried within said housing at the forward end portion of said spring means,
  • said means for moving said striking means out of engagement with said surface portion comprising a part of said movable member facing said striking means which is shaped to effect such movement of said striking means with movement of said member against said striking means.
  • a push button piezoelectric lighter as set forth in claim 5 in which a. said movable member is axially recessed, said reeess defining a bore extending from the inner end toward the outer push button end of said member,
  • said elongated spring means comprising a helical coil spring, the rear end portion of said coil spring being frictionally held in said bore to anchor said coil spring to said movable member, and
  • said bore at the inner open end thereof being of I conical form and enlarged and providing a surface which defines said part of said movable member facing said striking means
  • a push button piezoelectric lighter as set forth in claim 6 in which a. said striking means comprises a rear plug-shaped part and a front striking head part serving as said hammer,
  • said striking head part being of larger crosssectional area than-said plug-shaped part
  • a push button piexoelectric lighter as set forth in claim 5 in which (a) said housing comprises an elongated hollow outer sleeve,
  • said piezoelectric element means being disposed within said housing at one end thereof,
  • said movable member being disposed within said outer sleeve at the opposite end thereof, said outer sleeve serving as a guide tube for said member,
  • said part supported in said housing comprising a able member and in abutting relation with said element means
  • a helical compression spring disposed axially within said outer sleeve between said inner sleeve and said movable member to return the latter to its outer position upon release of said push button

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lighters Containing Fuel (AREA)
US00315419A 1971-12-23 1972-12-15 Piezoelectric gas lighter Expired - Lifetime US3793561A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7116575A SE351286C (sv) 1971-12-23 1971-12-23 Piezoelektrisk gastendare

Publications (1)

Publication Number Publication Date
US3793561A true US3793561A (en) 1974-02-19

Family

ID=20302461

Family Applications (1)

Application Number Title Priority Date Filing Date
US00315419A Expired - Lifetime US3793561A (en) 1971-12-23 1972-12-15 Piezoelectric gas lighter

Country Status (7)

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US (1) US3793561A (enrdf_load_stackoverflow)
AR (1) AR196223A1 (enrdf_load_stackoverflow)
BR (1) BR7209050D0 (enrdf_load_stackoverflow)
CA (1) CA961080A (enrdf_load_stackoverflow)
FR (1) FR2211628B1 (enrdf_load_stackoverflow)
GB (1) GB1366178A (enrdf_load_stackoverflow)
SE (1) SE351286C (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3903436A (en) * 1973-02-23 1975-09-02 Mansei Kogyo Kk Piezoelectric generating device
US3963966A (en) * 1973-05-14 1976-06-15 Braun Aktiengesellschaft Hammer for a piezoelectric igniter
US3984738A (en) * 1973-05-14 1976-10-05 Braun Aktiengesellschaft Piezoelectric igniter for lighters
US4485324A (en) * 1983-08-11 1984-11-27 Channel Products, Inc. Piezoelectric high voltage impact mechanism
US5938428A (en) * 1997-08-08 1999-08-17 Newell Operating Company Spark igniter mechanism
US6166493A (en) * 1996-10-31 2000-12-26 Cesarini; Giacomo Salvatore Electric multispark ignition system, insensitive to moisture and wet
US6286235B1 (en) * 1999-09-16 2001-09-11 Sun-Tae An Footwear containing an ozone generation apparatus
US20080248435A1 (en) * 2004-10-19 2008-10-09 Terry Clark Devices For High Voltage Ignition of Combustible Gas
US20090004613A1 (en) * 2007-06-29 2009-01-01 Xinhua Huang Child resistant utility lighter
US20100304315A1 (en) * 2009-05-29 2010-12-02 Gulkanat Bektas C Combination Safety Valve and Ignition Trigger For Gas Burners
US10801667B2 (en) 2015-04-29 2020-10-13 Graco Minnesota Inc. Lubrication injector with energy harvesting

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3408153A (en) * 1966-04-25 1968-10-29 Ishiguro Mitsuei Gas lighter with a manually operable piezoelectric ignition device
US3449637A (en) * 1967-01-06 1969-06-10 Clevite Corp Pushbutton piezoelectric igniter
US3457461A (en) * 1967-02-22 1969-07-22 Bosch Gmbh Robert Piezoelectric igniter for gaseous fuels or the like
US3486075A (en) * 1967-02-11 1969-12-23 Bosch Gmbh Robert Piezoelectric igniter
US3521987A (en) * 1967-08-03 1970-07-28 Mansei Kogyo Kk Electric gas lighter with manually operable piezoelectric ignition device
US3540823A (en) * 1968-03-28 1970-11-17 Crown Sangyo Kk Piezoelectric spark generator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE759564A (fr) * 1969-11-28 1971-04-30 Junkers & Co Dispositif d'allumage piezoelectrique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3408153A (en) * 1966-04-25 1968-10-29 Ishiguro Mitsuei Gas lighter with a manually operable piezoelectric ignition device
US3449637A (en) * 1967-01-06 1969-06-10 Clevite Corp Pushbutton piezoelectric igniter
US3486075A (en) * 1967-02-11 1969-12-23 Bosch Gmbh Robert Piezoelectric igniter
US3457461A (en) * 1967-02-22 1969-07-22 Bosch Gmbh Robert Piezoelectric igniter for gaseous fuels or the like
US3521987A (en) * 1967-08-03 1970-07-28 Mansei Kogyo Kk Electric gas lighter with manually operable piezoelectric ignition device
US3540823A (en) * 1968-03-28 1970-11-17 Crown Sangyo Kk Piezoelectric spark generator

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3903436A (en) * 1973-02-23 1975-09-02 Mansei Kogyo Kk Piezoelectric generating device
US3963966A (en) * 1973-05-14 1976-06-15 Braun Aktiengesellschaft Hammer for a piezoelectric igniter
US3984738A (en) * 1973-05-14 1976-10-05 Braun Aktiengesellschaft Piezoelectric igniter for lighters
US4485324A (en) * 1983-08-11 1984-11-27 Channel Products, Inc. Piezoelectric high voltage impact mechanism
US6166493A (en) * 1996-10-31 2000-12-26 Cesarini; Giacomo Salvatore Electric multispark ignition system, insensitive to moisture and wet
US5938428A (en) * 1997-08-08 1999-08-17 Newell Operating Company Spark igniter mechanism
US6286235B1 (en) * 1999-09-16 2001-09-11 Sun-Tae An Footwear containing an ozone generation apparatus
US20080248435A1 (en) * 2004-10-19 2008-10-09 Terry Clark Devices For High Voltage Ignition of Combustible Gas
US20090004613A1 (en) * 2007-06-29 2009-01-01 Xinhua Huang Child resistant utility lighter
US7581947B2 (en) * 2007-06-29 2009-09-01 Xinhua Huang Child resistant utility lighter
US20100304315A1 (en) * 2009-05-29 2010-12-02 Gulkanat Bektas C Combination Safety Valve and Ignition Trigger For Gas Burners
US10801667B2 (en) 2015-04-29 2020-10-13 Graco Minnesota Inc. Lubrication injector with energy harvesting

Also Published As

Publication number Publication date
CA961080A (en) 1975-01-14
BR7209050D0 (pt) 1974-09-10
FR2211628A1 (enrdf_load_stackoverflow) 1974-07-19
GB1366178A (en) 1974-09-11
FR2211628B1 (enrdf_load_stackoverflow) 1976-04-23
SE351286C (sv) 1979-07-30
AR196223A1 (es) 1973-12-10
SE351286B (enrdf_load_stackoverflow) 1972-11-20

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