US3898534A - Piezoelectric lighter with impact mechanism - Google Patents

Piezoelectric lighter with impact mechanism Download PDF

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Publication number
US3898534A
US3898534A US387380A US38738073A US3898534A US 3898534 A US3898534 A US 3898534A US 387380 A US387380 A US 387380A US 38738073 A US38738073 A US 38738073A US 3898534 A US3898534 A US 3898534A
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United States
Prior art keywords
hammer
magnetically
magnet
piezoelectric
conductive
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Expired - Lifetime
Application number
US387380A
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English (en)
Inventor
Walter Mohr
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.)
Braun GmbH
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Braun GmbH
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Filing date
Publication date
Priority claimed from DE2243727A external-priority patent/DE2243727C3/de
Priority claimed from DE19732302638 external-priority patent/DE2302638C3/de
Application filed by Braun GmbH filed Critical Braun GmbH
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Publication of US3898534A publication Critical patent/US3898534A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F23Q3/00—Igniters using electrically-produced sparks
    • 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

  • the hammer cooperates with 3 l7/D /67 F; 1/132, 255 an energy storage spring which is Compressible by an actuation member and which is retained in a rest posi- [56] Refer n s Cited tion by one or more magnets.
  • Such piezo electric igniters are generally known. They include a fixed permanent magnet to which adheres a hammer consisting of a ferromagnetic material in the rest position of the mechanism. Such a piezoelectric igniter has the drawback that a relatively large magnet must be used in order to generate the necessary holding forces. Furthermore, there is a disadvantage that the hammer after it has been removed from the magnet remains very long in the region of its attraction so that a large portion of the energy stored in the energy storage spring cannot be used for accelerating the hammer but must be used to overcome the attractive force between magnet and hammer.
  • Piezoelectric igniters for lighters are mass produced articles which cannot be too expensive in manufacture. Permanent magnets, which are presently available in the trade which can be used for this purpose, considering their price, do not generate the necessary holding force.
  • a magnetically-conductive member is disposed at both poles of each magnet.
  • the hammer forms a pot-shaped magnetically-conductive member in which is disposed a magnet.
  • a fixed magnetically-conductive yoke or frame is disposed adjacent to the open side of the potshaped magnetically-conductive member.
  • the pot-shaped magnetically-conductive member may be guided in a housing which is magnetically nonconductive.
  • the magnet consists of two individual members shaped like a parallelepiped, two sides of which are provided with magnetically conductive plates, the plates being longer than the parallelepiped blocks of the magnet.
  • This unit is secured to a housing.
  • a disk-shaped hammer At the lower side of the plates there is provided a disk-shaped hammer, the lower side of which is convex while its upper side carries a guide pivot which may slide in the free space between the magnets.
  • the magnetic circuit includes a permanent magnet, a magneticallyconductive member adjacent to the magnet and a magnetically-conductive yoke, the yoke being relatively movable with respect to the other two parts of the magnetic circuit.
  • the magnetically-conductive member and the permanent magnet may form the hammer.
  • the magnetically-conductive member and the permanent magnet may be fixed so that the yoke forms the hammer.
  • the yoke must have a sufficiently large mass, but this construction may be relatively easily achieved.
  • Such an embodiment consists preferably in that the yoke is tiltably arranged with respect to a unit consisting of the magnetically-conductive member and the permanent magnet. Additionally, an energy storage spring may be secured to the yoke.
  • the energy storage spring is arranged as a leaf spring, one end of which is secured to the yoke while the other end operates as an actuation element.
  • a further preferred embodiment includes a permanent magnet and a magnetically-conductive element having an axial opening in which is disposed the energy storage spring and a ram serving as the actuating element.
  • the magnetic circuit includes a shunt circuit including at least one air gap, the magnetic resistance of which is at least three times as large as the magnetic resistance of the closed magnetic circuit.
  • the shunt circuit may also be formed by an air gap between the magnet and the magnetically-conductive member.
  • a special embodiment consists in that the hammer is formed by a magnetically-conductive member having a T-shaped cross section. At the side faces of the member there is provided at least one axially polarized magnet.
  • FIG. 4 is a side elevational view in perspective of a preferred embodiment of the piezoelectric igniter of the invention.
  • FIG. 5 is a longitudinal sectional view through another piezoelectric igniter embodying the invention.
  • FIG. 6 is a longitudinal sectional view through a modified construction of a piezoelectric igniter.
  • the piezoelectric igniter illustrated in FIG. 1 includes a cylindrical housing which consists of a material which is magnetically non conductive. In the lower portion of the housing there is provided a piezoelectric transducer 2 hereinafter referred to as a transducer.
  • the transducer includes two piezoelectric crystals 3 between which is disposed a high voltage electrode 4. Within the transducer there is also disposed an impact plate.
  • the surface of the transducer is surrounded by an insulating layer 5. Its lower surface is disposed adjacent to the bottom 6 of the housing 1. Above the plate 7 there is disposed a pot-shaped magnetically-conductive member 8 in the interior of which is secured a permanent magnet 9 spacedfrom the side walls of the magnetically-conductive member 8. The pot-shaped magnetically conductive member 8 and the permanent magnet 9 form the hammer of the piezoelectric igniter.
  • a yoke 10 which is magnetically conductive and which is formed as a plate adjacent the hammer and which extends into a pin-shaped extension.
  • the yoke 10 consists of a ferromagnetic material.
  • the lower plate-like region of the yoke 10 covers the upwardly open surface of the potshaped magnetically-conductive member 8 and in the rest position rests on the member 8 so that the magnetic circuit is closed consisting of the magneticallyconductive member 8, the permanent magnet 9 and the yoke 10. This means that there is essentially no air gap in the magnetic circuit.
  • the shaft of the yoke 10 is fixedly connected with a pot-shaped body preferably of a synthetic material or resin 11.
  • the body 11 is provided with a transverse bore 12 in its upper region through which extends a holding pin 13 which in turn extends through openings 14 in the housing 1 and which fixes the yoke 10 and the synthetic resin body 11 with respect to the housing.
  • an actuation cap 15 which is provided with at least two diametrically opposite longitudinal apertures 16 which are traversed by the holding pin 13 and which limit the movement of the actuation cap.
  • the lower edge 17 of the actuation cap 15 serves as a support for an energy storage spring 18, the other end of which rests against the pot-shaped magnetically'conductive member 8.
  • the piezoelectric igniter further includes a return spring 19 which is disposed between the plate 7 and a shoulder-like recess in the bottom of the pot-shaped magnetically-conductive member 8.
  • Such a piezoelectric igniter operates as follows: When the actuation cap 15 is depressed the energy storage spring is compressed and tensioned so that a force is exerted on the pot-shaped magnetically conductive member 8. As soon as the reactive force generated in the energy storage spring by means of the actuation cap exceeds the holding force of the hammer consisting of the magnetically-conductive piece 8 and the permanent magnet 9 by the yoke, the hammer suddenly moves away from the yoke and is accelerated by the liberation of the energy stored in the energy storage spring 18 in the direction toward the pivot of the transducer 2. The hammer only has to overcome the, attractive force which rapidly decreases with distance from the yoke as well as the force necessary for compressing the return spring 19.
  • This high voltage impulse may, for example, be utilized for generating a spark in a spark gap.
  • the spark in turn may be used for igniting the fuel of an igniter.
  • FIG. 2 shows a longitudinal sectional view of the piezoelectric igniter of FIG. 1 in a plane rotated through and illustrates a slightly modified embodiment.
  • the return spring 31 is not disposed between the hammer and the transducer but is disposed in the interior space of the actuation cap 15.
  • the actuation cap 15 consists of a ferromagnetic material so that a magnetic shunt circuit is formed by the pot-shaped magnetically-conductive member 8 through the energy storage spring 18 and the actuation cap 15 which is sufficient to lift the hammer 8 and 9 again into its rest position.
  • the energy storage spring 18 is fixedly connected with the magnetically-conductive member 8, for example, by means of one or several pins disposed in a circular recess of the magnetically-conductive member 8. Furthermore, the energy storage spring 18 is fixedly connected at its upper end with the actuation cap 15 in the same or similar manner. Otherwise, the construction corresponds to that illustrated in FIG. 1.
  • FIG. 3 illustrates the upper part of a further embodiment of a piezoelectric igniter according to the inven tion.
  • the magnet consists of two individual blocks shaped like a parallelepiped 39 which is surrounded on two sides by plates 42 of magnetically-conductive material, the plates being longer than the parallelepiped blocks 39 of the magnet.
  • the thus formed unit is secured to the housing 41, for example, by pressing.
  • a disk-shaped hammer 21 rests against the lower surface of the plates.
  • the lower surface of the hammer is convex as shown while its upper portion carries a guide pivot 22 which can slide in the free space between the magnets.
  • Y It is feasible to provide a disk, not illustrated, having a lower convex surface and disposed between the guide pin 22 and the energy storage spring 38. This disk ensures that the force of the energy storage spring 38 acts against the guide pin 22 along the axis of movement.
  • the energy storage spring 38 In the central space between the two blocks 39 of the magnet there is disposed the energy storage spring 38, the lower end of which rests against the disk 21 while its upper end bears against an actuation stem 23 which is prevented from falling out of the housing by a radially inwardly directed flange 24 of the housing 41.
  • the energy storage spring 38 When the actuating stem 23 is depressed the energy storage spring 38 is tensioned. Since the reactive force of the spring is greater than the holding force of the disk-shaped hammer 21, the hammer moves easily from the magnetically-conductive plates 42 and is accelerated in the direction of the transducer whereby the return spring 19 is compressed. When the actuation stamp 23 is released, the energy storage spring 38 returns into its neutral position. Thereafter the disk 21, the energy storage spring 38 and the actuation stem 23 are returned to their rest position by the force of the re turn spring 19.
  • the parts of the magnetic circuit are formed axially symmetrically with respect to the axis of motion of the movable plates, in this case the disk 21, there are no forces acting on the hammer at an angle so that the hammer is not substantially twisted from its axially symmetrical orientation during its accelerated motion.
  • FIG. 4 illustrates a simple embodiment of a piezoelectric igniter according to the invention.
  • the magnetic circuit includes an L-shaped magneticallyconductive member 25.
  • a permanent magnet 26 shaped like a parallelepiped is secured in such a manner that the two elements form a U.
  • a yoke 27 of a ferromagnetic material which also serves as the hammer.
  • a leaf spring 29 at an inclined surface 28 of the yoke.
  • a U-shaped holding sheet 30 consisting of a magneticallynonconductive material.
  • the piezoelectric transducer 2 In the base region 31 of the holding sheet 30 there are arranged the piezoelectric transducer 2 in such a manner that its impact plate 32 is opposite the hammer 27.
  • the piezoelectric igniter of FIG. 4 operates in the following manner. In order to actuate the igniter the leaf spring 29 is pressed in the direction indicated by the arrow so that the spring is bent.
  • the hammer 27 lifts off the free leg of the magneticallyconductive member 25 and is accelerated by the force of the leaf spring 29 in the direction toward the impact plate 32 of the transducer 2.
  • a pressure wave is generated in the transducer 2 which generates a high voltage impulse at the high voltage electrode 4.
  • the leaf spring 29 When the leaf spring 29 is released the hammer 27 is returned into its rest position illustrated in FIG. 4 by the leakage field lines of the magnetic circuit. In order not to impede this return motion the leaf spring 29 should consist of a material which is magneticallynonconductive or should be sufficiently far removed from the permanent magnet 26 in its actuated position.
  • the piezoelectric igniter illustrated in FIG. 5 includes a cylindrical housing 51 consisting of a material which is magnetically nonconductive. In the lower portion of the housing there is disposed a piezoelectric transducer 52 containing two piezoelectric crystals 53 between which is disposed a high voltage electrode 54. At the upper surface of the transducer there is disposed a semispherical impact plate 57. Above the impact plate 57 there is disposed a pot-like magnetically-conductive member 58 in the interior of which is secured a permanent magnet 59 spaced from the side wall of the magnetically-conductive member. The potshaped magnetically-conductive member 58 and the permanent magnet 59 form the hammer of the piezoelectric igniter.
  • a magnetically conductive yoke plate 60 which is secured by pins 61 to the wall of the housing 51.
  • the yoke plate 60 is provided with a central bore 62 through which extends the shaft of a mushroom-shaped pressure transfer member 63, the head 64 of which can slide within the housing 51 with a certain play.
  • a return spring 65 At the upper surface of the head 64 is disposed the energy storage spring 66 disposed in the actuation cap 67.
  • the permanent magnet 59 is provided at the pole surface adjacent the yoke plate 60 with a magnetically-conductive plate 68 into which is secured the end of the shaft 62 of the mushroom-shaped pressure transfer member 63.
  • the thickness of the permanent magnet 59 and of the magnetically-conductive plate 68 are so selected that the free upper surface of these elements is disposed in the plane of the edge of the potshaped magneticallyconductive member 58 adjacent the yoke plate 60.
  • the energy storage spring 66 When the actuation cap 67 is depressed the energy storage spring 66 is tensioned so that the force exerted on the pressure transfer member 63 increases. As soon as the force exerted by the energy storage spring 66 becomes larger than the holding force of the permanent magnet 59, the unit consisting of the members 58, 59, 68 and 63 are removed from the yoke plate 60 and moved with acceleration against the pressure plate 57. As soon as the pot-shaped magnetically-conductive member 58 impacts the plate 57, a pressure wave is created in the piezoelectric transducer 52 which results in a high voltage impulse at the high voltage electrode 54.
  • the magnetic resistance of the magnetic surface is increased because the circuit now contains an air gap between the magnetically-conductive plates 68 and the magnetically-conductive member 58.
  • the magnitude of this air gap may be so selected that only a small leakage flux extends outwardly beyond the housing 51.
  • FIG. 6 utilizes instead of a pot-shaped, a mushroom-shaped magneticallyconductive member 70, the shaft 71 of which is surrounded by an annular magnet 72 in such a manner that an air gap 84 remains between the two parts.
  • This air gap may be filled with a nonconductive material.
  • a magnetically-conductive conductive annular member 73 Disposed on the surface of the pole of the permanent magnet not connected with the mushroom-shaped magnetically-conductive member 70 there is disposed a magnetically-conductive conductive annular member 73, the face of which is flush with the face of the shaft 71.
  • the yoke 74 is secured in its upper region by a pin 75 to the housing 51.
  • the yoke 74 is so formed that an annular space is provided between it and the housing 51.
  • an energy storage spring 76 In this annular space there is provided an energy storage spring 76, one end of which rests against the magneticallyconductive ring 73 and the other end against the face of an actuating cap 77.
  • the actuating cap fits into the annular space and is provided at diametrically opposite points with longitudinal apertures 78 through which the pins 75 extend. The actuating cap 77 can accordingly be moved only to a limited extent which is defined by the length of these apertures.
  • a return spring 79 Between the piezoelectric transducer 52 and the mushroomed-shaped magnetically-conductive member 70 there is further provided a return spring 79.
  • the energy storage spring 76 When the actuating cap 77 is depressed the energy storage spring 76 is tensioned. Accordingly, it exerts an increasing force on the magnetically-conductive ring 73 and the parts connected thereto. As soon as the force developed by the energy storage spring 76 is greater than the holding force of the magnet and the force of the return spring 79, the unit consisting of parts 70, 72 and 73, that is the socalled hammer, moves away from the yoke 74 and impacts the impact plate 80 of the transducer 52.
  • the described piezoelectric igniters have the advantage that they develop a relatively large holding force.
  • the attractive force rapidly reduces even at a small distance of the hammer from the yoke 74 so that the energy stored in the energy storage spring 76 can be transformed to a major portion into kinetic energy of the hammer.
  • a piezoelectric igniter of the type normally used in a lighter comprising a magnetically non-conductive housing;
  • an electric circuit including electrical leads and electrodes connected to the piezoelectric transducer for ignition purposes;
  • spring means being operable to exert a force against said hammer in a direction toward said transducer when the potential energy of the spring means is increased;
  • a magnetic circuit comprising a fixed part, a movable part, one of said parts including a magnet having pole faces and both said parts being magneticallyconductive, said parts being sufficiently closely adjacent each other in the rest position of the hammer for closing the magnetic circuit substantially free from any air gap, said movable part being connected to the hammer and being movable therewith and being operable due to the magnetic force exerted between said parts to hold said hammer in said rest position against the force of said spring means throughout that portion of the increase in potential energy of said spring means which is at least inferior to said magnetic force;
  • said hammer including a pot-shaped magneticallyconductive member disposed in said hammer and having an open side, said movable part being a magnet disposed in said member, said fixed part comprising a magnetically-conductive yoke, the open side of said magnetically-conductive member being disposed next to said yoke in the rest position of said hammer.
  • Piezoelectric igniter as claimed in claim 1 wherein a magnetically-conductive member is disposed adja cent each of the poles of said magnet during said predetermined rest position but not at other times.
  • Piezoelectric igniter as claimed in claim 1 wherein the magnetically-conductive yoke is secured to said housing.
  • Piezoelectric igniter as claimed in claim 1 wherein said hammer is formed by said magnetically-conductive member and said permanent magnet.
  • a Piezoelectric lighter as claimed in claim 1 said movable part including said magnet and an additional magnetically-conductive member in contact with said magnet at all times and movable therewith together with said hammer, said magnet being a permanent magnet.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Air Bags (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Lighters Containing Fuel (AREA)
US387380A 1972-09-06 1973-08-10 Piezoelectric lighter with impact mechanism Expired - Lifetime US3898534A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2243727A DE2243727C3 (de) 1972-09-06 1972-09-06 Piezozünder mit Schlagmechanik
DE19732302638 DE2302638C3 (de) 1973-01-19 1973-01-19 Piezozünder mit Schlagmechanik

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US3898534A true US3898534A (en) 1975-08-05

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US387380A Expired - Lifetime US3898534A (en) 1972-09-06 1973-08-10 Piezoelectric lighter with impact mechanism

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JP (1) JPS4967768A (enrdf_load_html_response)
AR (1) AR206995A1 (enrdf_load_html_response)
AT (1) AT324743B (enrdf_load_html_response)
AU (1) AU5999573A (enrdf_load_html_response)
CA (1) CA984885A (enrdf_load_html_response)
CH (1) CH556002A (enrdf_load_html_response)
DD (1) DD107336A5 (enrdf_load_html_response)
ES (1) ES193813Y (enrdf_load_html_response)
FR (1) FR2198094B1 (enrdf_load_html_response)
GB (1) GB1432685A (enrdf_load_html_response)
IE (1) IE38575B1 (enrdf_load_html_response)
IT (1) IT992212B (enrdf_load_html_response)
NL (1) NL7312161A (enrdf_load_html_response)
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963966A (en) * 1973-05-14 1976-06-15 Braun Aktiengesellschaft Hammer for a piezoelectric igniter
US4015151A (en) * 1974-05-14 1977-03-29 Braun Aktiengesellschaft Piezoelectric igniter with a striking mechanism
US4015152A (en) * 1974-08-12 1977-03-29 Braun Aktiengesellschaft Impact mechanism for piezoelectric transducers
US4076491A (en) * 1975-08-21 1978-02-28 Braun Aktiengesellschaft Lighter with swingable actuator
US4078187A (en) * 1976-08-18 1978-03-07 Oki Electric Industry Co., Ltd. Piezoelectric switching device
US6591524B1 (en) 1996-10-15 2003-07-15 Buztronics, Inc. Advertising article with automatically activated flasher or sound module
US20030164662A1 (en) * 2002-03-01 2003-09-04 Enric Amoros Piezoelectric ignition mechanism
US6765338B2 (en) 2001-05-29 2004-07-20 Bic Corporation Child-resistant piezoelectric lighter
US20110169271A1 (en) * 2010-01-11 2011-07-14 Chia-Li Chen Micro power generating device
US20140209599A1 (en) * 2013-01-25 2014-07-31 Energyield, Llc Energy harvesting container

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112547731A (zh) * 2020-11-24 2021-03-26 古格亚(温州)网络科技有限公司 一种水泥运输用自清洁沉淀水泥提高输送效率的辅助设备

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3364451A (en) * 1964-07-13 1968-01-16 Siemens Ag Switching device without spring contacts
US3366808A (en) * 1966-01-03 1968-01-30 Friden Inc Keyboard key transducer
US3389275A (en) * 1967-01-19 1968-06-18 Army Usa Piezoelectric generator unit for space vehicles
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
US3509388A (en) * 1967-03-25 1970-04-28 Matsushita Electric Ind Co Ltd High voltage generating device
US3541360A (en) * 1968-05-21 1970-11-17 Matsushita Electric Ind Co Ltd Device for importing multiple spaced impacts to a piezoelectric crystal
US3540823A (en) * 1968-03-28 1970-11-17 Crown Sangyo Kk Piezoelectric spark generator
US3586888A (en) * 1969-10-16 1971-06-22 Sperry Rand Corp Impact transducer switch
US3729639A (en) * 1971-04-02 1973-04-24 Murata Manufacturing Co Piezoelectric igniter
US3758262A (en) * 1972-07-14 1973-09-11 Dunhill Lighters Ltd Portable gas lighter with magnetically operated lid

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3364451A (en) * 1964-07-13 1968-01-16 Siemens Ag Switching device without spring contacts
US3366808A (en) * 1966-01-03 1968-01-30 Friden Inc Keyboard key transducer
US3449637A (en) * 1967-01-06 1969-06-10 Clevite Corp Pushbutton piezoelectric igniter
US3389275A (en) * 1967-01-19 1968-06-18 Army Usa Piezoelectric generator unit for space vehicles
US3457461A (en) * 1967-02-22 1969-07-22 Bosch Gmbh Robert Piezoelectric igniter for gaseous fuels or the like
US3509388A (en) * 1967-03-25 1970-04-28 Matsushita Electric Ind Co Ltd High voltage generating device
US3540823A (en) * 1968-03-28 1970-11-17 Crown Sangyo Kk Piezoelectric spark generator
US3541360A (en) * 1968-05-21 1970-11-17 Matsushita Electric Ind Co Ltd Device for importing multiple spaced impacts to a piezoelectric crystal
US3586888A (en) * 1969-10-16 1971-06-22 Sperry Rand Corp Impact transducer switch
US3729639A (en) * 1971-04-02 1973-04-24 Murata Manufacturing Co Piezoelectric igniter
US3758262A (en) * 1972-07-14 1973-09-11 Dunhill Lighters Ltd Portable gas lighter with magnetically operated lid

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963966A (en) * 1973-05-14 1976-06-15 Braun Aktiengesellschaft Hammer for a piezoelectric igniter
US4015151A (en) * 1974-05-14 1977-03-29 Braun Aktiengesellschaft Piezoelectric igniter with a striking mechanism
US4015152A (en) * 1974-08-12 1977-03-29 Braun Aktiengesellschaft Impact mechanism for piezoelectric transducers
US4076491A (en) * 1975-08-21 1978-02-28 Braun Aktiengesellschaft Lighter with swingable actuator
US4078187A (en) * 1976-08-18 1978-03-07 Oki Electric Industry Co., Ltd. Piezoelectric switching device
US6591524B1 (en) 1996-10-15 2003-07-15 Buztronics, Inc. Advertising article with automatically activated flasher or sound module
US6765338B2 (en) 2001-05-29 2004-07-20 Bic Corporation Child-resistant piezoelectric lighter
US20030164662A1 (en) * 2002-03-01 2003-09-04 Enric Amoros Piezoelectric ignition mechanism
US6856074B2 (en) 2002-03-01 2005-02-15 Bic Corporation Piezoelectric ignition mechanism
US20110169271A1 (en) * 2010-01-11 2011-07-14 Chia-Li Chen Micro power generating device
US20140209599A1 (en) * 2013-01-25 2014-07-31 Energyield, Llc Energy harvesting container
US9913321B2 (en) * 2013-01-25 2018-03-06 Energyield, Llc Energy harvesting container

Also Published As

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FR2198094B1 (enrdf_load_html_response) 1977-08-05
ES193813Y (es) 1975-03-16
GB1432685A (en) 1976-04-22
ES193813U (es) 1974-12-01
AU5999573A (en) 1975-03-06
SU578909A3 (ru) 1977-10-30
DD107336A5 (enrdf_load_html_response) 1974-07-20
CH556002A (de) 1974-11-15
CA984885A (en) 1976-03-02
IE38575L (en) 1974-03-06
AT324743B (de) 1975-09-10
AR206995A1 (es) 1976-09-09
FR2198094A1 (enrdf_load_html_response) 1974-03-29
IT992212B (it) 1975-09-10
JPS4967768A (enrdf_load_html_response) 1974-07-01
NL7312161A (enrdf_load_html_response) 1974-03-08
IE38575B1 (en) 1978-04-12

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