US3364393A - Arrangement for igniting combustible fluid - Google Patents

Arrangement for igniting combustible fluid Download PDF

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Publication number
US3364393A
US3364393A US485510A US48551065A US3364393A US 3364393 A US3364393 A US 3364393A US 485510 A US485510 A US 485510A US 48551065 A US48551065 A US 48551065A US 3364393 A US3364393 A US 3364393A
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US
United States
Prior art keywords
piezo
discharge
electric
capacitor
spark gap
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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
US485510A
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English (en)
Inventor
Peter Rabe
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.)
Heinrich Maltner GmbH
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Heinrich Maltner GmbH
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 Heinrich Maltner GmbH filed Critical Heinrich Maltner GmbH
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Publication of US3364393A publication Critical patent/US3364393A/en
Anticipated expiration legal-status Critical
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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
    • F23Q3/00—Igniters using electrically-produced sparks
    • F23Q3/002—Igniters using electrically-produced sparks using piezoelectric elements

Definitions

  • Piezo-electric means are provided for generating a piezo-electric current in response to a change in its existent stress condition.
  • Capacitor means is connected in parallel with the piezo-electric means and is charged by the current generated by the latter, and is arranged to discharge in response to the change in the existing stress condition of the piezo-electric means reaching a predetermined limit.
  • Electrode means is connected in circuit with the capacitor means and defines a spark gap for discharge of the capacitor means.
  • Means is provided for heating a combustible fluid to the vicinity of the spark gap so as to be ignited upon discharge of the capacitor means across the same.
  • the present invention relates to an arrangement for igniting combustible fluids. More particularly, the invention relates to an arrangement for igniting such fluids by means of an electrical discharge. Still more specifically, the invention relates to an arrangement of the abovementioned type in which the electrical current for the igniting spark is generated by piezo-electric means.
  • Piezo-electric ignition arrangements are already known in which the piezo-electric crystal is subjected to a change in an existing stress condition, thereby causing a flow of staticor piezo-electricity across the two poles of the crystal. This electricity is then discharged via a spark gap and serves to ignite a combustible fluid fed to the vicinity of the spark gap.
  • known piezo-electric ignition arrangements have been suffering so far from the drawback that they are not capable of igniting ditficult-to-ignite fluids.
  • the reason for this is that, as the stress-condition of the piezoelectric body is varied, for example by application of pressure to the body, the total electrical energy the piezoelectric body is capable of yielding is not produced suddenly and at once, but in a series of steps because, as the voltage for which the spark gap is designed is reached, the piezo-electric body will discharge across the spark gap.
  • the spark discharge in known arrangements of this type is not strong enough to ignite fluids which are not readily combustible, such as butane or propane.
  • a more specific object of the invention is to provide an arrangement for igniting combustible fluids in which the spark discharge will be strengthened so that it will ignite not-readily-combustible fluids.
  • Still a more specific object of the invention is to provide a piezo-electric ignition arrangement in which a capacitor means is connected in parallel with the piezoelectric body and is charged by the current created upon compression of the piezoelectric body, so that the capacitor means will discharge in response to the charge reaching a predetermined limit.
  • piezoelectric means which is adapted to generate a piezo-electric current in response to a change in its existing stress condition
  • capacitor means which is connected in parallel to the piezoelectric means and is to be charged by said current, and which is to discharge in response to the change in the existing stress condition of the piezoelectric means reaching a pre-determined limit
  • electrode means connected in circuit with the capacitor means and defining a spark gap for discharge of the capacitor means thereacross
  • the invention is based on the realization, as has been briefly mentioned before, that piezoelectric bodies generally generate suflicient energy to ignite even fluids which are not readily ignitable. However, this energy is discharged not all at once, but in stages which correspond to the ignition potential of the spark gap with which the piezoelectric body is connected. As soon as this potential is reached at the poles of the piezo-electric body, the spark is discharged across the gap, and it therefore can have only as much energy as is available at the piezo-electric body at this moment. Generally speaking, the first discharge occurs long before maximum compression of the piezo-electric body is reached; in other words, if discharge at this time can be avoided, then the continued compression of the piezoelectric body will produce additional current, thereby increasing the strength of the spark.
  • Reference numeral 1 indicates the piezo-electric body having a given capacitance and which is compressed by a force acting in the direction of the arrow against a support or the like indicated by reference numeral 3.
  • the body 1 is provided with a pair of electrodes 4 and 5 at its respective poles, and these electrodes are connected by conductors '7 and 8 to the discharge electrodes 6' and 7' of the spark gap 8.
  • a capacitor 9, which has a capacitance greater than the body 1, is connected in parallel with the electrodes 4 and 5 of the piezo-electric body 1.
  • a conduit 10 serves to feed a diflicult-to-ignite fluid, such as a mixture of butane and propane gas, to the vicinity of the spark gap 8 so that, when this mixture of games is ignited, the flame 11 will result.
  • a diflicult-to-ignite fluid such as a mixture of butane and propane gas
  • the capacitive impedance must not necessarily be a commercially available capacitor but can also be provided thru a capacitor in form of a metal part in or at the ignition device, or thru use of air as the dielectric or'as the insulating part in or at the ignition device. It is also possible to achieve the same result by increasing the capacitance of the conductor or cable, by differential arrangement of several such members, and finally thru pure earth or space capacitances.
  • piezo-electric means having a predetermined capacitance and being adapted to generate a piezoelectric current in response to a change in its existing stress condition; capacitor means having a capacitance greater than said predetermined capacitance and being connected in parallel with said piezo-electric means to be charged by said current, and to discharge in response to said change in the existing stress-condition of said piezoelectric means reaching a predetermined limit;
  • piezo-electric means having a predetermined capacitance and an existing stress condition and being adapted to generate a piezoelectric current in response to a change in its existing stress-condition;
  • capacitor means having a capacitance greater than said predetermined capacitance and being connected in parallel with said piezo-electric means to be charged by said current, and to discharge in response to reaching a predetermined condition of charge;
  • piezo-electric means having a predetermined capacitance and being adapted to generate a piezo-electric current in response to a change in its existing stresscondition;
  • capacitor means having a capacitance greater than said predetermined capacitance and being connected in parallel with said piezo-electric means to be charged by said current, and to discharge in response to said change in the existing stress-condition of said piezoelectric means reaching a predetermined limit;
  • a pieZo-electric element having a predetermined capacitance and being adapted to generate a piezo-electric current in response to mechanical compression
  • a capacitor having a capacitance greater than said predetermined capacitance and being connected in parallel with said piezo-electric element to be charged upon generation of said current, and to discharge upon reaching a predetermined condition of charge;
  • a piezo-electric element having a predetermined capacitance and being adapted to generate a piezo-electric current in response to mechanical deformation
  • a capacitor having a capacitance greater than said predetermined capacitance and being connected in parallel with said element for charging thereby upon generation of current in response to said mechanical deformation, and for discharging upon reaching a predetermined condition. of charge;
  • a method of igniting a combustible fluid including the step-s of mechanically changing the existing stress-condition of a piezo-electric means so as to generate piezo-electric charge in the latter;
  • a method of igniting a combustible fluid including the steps of mechanically changing the existing stress-condition of a piezo-electric means so as to generate piezo-electric current in the latter;

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Coloring (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
  • Air Bags (AREA)
US485510A 1964-09-07 1965-09-07 Arrangement for igniting combustible fluid Expired - Lifetime US3364393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM0062356 1964-09-07

Publications (1)

Publication Number Publication Date
US3364393A true US3364393A (en) 1968-01-16

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ID=43365443

Family Applications (1)

Application Number Title Priority Date Filing Date
US485510A Expired - Lifetime US3364393A (en) 1964-09-07 1965-09-07 Arrangement for igniting combustible fluid

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US (1) US3364393A (de)
CH (1) CH421871A (de)
GB (1) GB1056606A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3454346A (en) * 1967-09-25 1969-07-08 Robertshaw Controls Co Ignition means for cooking apparatus and the like
US3462234A (en) * 1967-09-25 1969-08-19 Robertshaw Controls Co Ignition means for cooking apparatus and the like
US3920375A (en) * 1973-12-04 1975-11-18 British Domestic Appliances Burner units for gas appliances
US3927354A (en) * 1973-07-23 1975-12-16 Braun Ag Device for generating electric sparks for igniting flammable vapors containing gas and air
US4054936A (en) * 1976-03-16 1977-10-18 Matsushita Electric Industrial Co., Ltd. Gas ignition device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2917670A (en) * 1958-06-17 1959-12-15 Joseph W Crownover Electrostatic generator and ignition system
US2944204A (en) * 1957-04-12 1960-07-05 Plessey Co Ltd Charging device for electrometers
US3030548A (en) * 1960-03-07 1962-04-17 Gen Motors Corp Ignition circuit
US3136355A (en) * 1962-12-14 1964-06-09 American Gas Ass Gas ignition system employing piezoelectric element
US3185869A (en) * 1961-12-01 1965-05-25 Endevco Corp Transducer
US3196794A (en) * 1959-06-18 1965-07-27 Robert C Meade Piezo-electric fuse device
US3200295A (en) * 1962-12-26 1965-08-10 Honeywell Inc Manually operable piezoelectric lighters

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2944204A (en) * 1957-04-12 1960-07-05 Plessey Co Ltd Charging device for electrometers
US2917670A (en) * 1958-06-17 1959-12-15 Joseph W Crownover Electrostatic generator and ignition system
US3196794A (en) * 1959-06-18 1965-07-27 Robert C Meade Piezo-electric fuse device
US3030548A (en) * 1960-03-07 1962-04-17 Gen Motors Corp Ignition circuit
US3185869A (en) * 1961-12-01 1965-05-25 Endevco Corp Transducer
US3136355A (en) * 1962-12-14 1964-06-09 American Gas Ass Gas ignition system employing piezoelectric element
US3200295A (en) * 1962-12-26 1965-08-10 Honeywell Inc Manually operable piezoelectric lighters

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3454346A (en) * 1967-09-25 1969-07-08 Robertshaw Controls Co Ignition means for cooking apparatus and the like
US3462234A (en) * 1967-09-25 1969-08-19 Robertshaw Controls Co Ignition means for cooking apparatus and the like
US3927354A (en) * 1973-07-23 1975-12-16 Braun Ag Device for generating electric sparks for igniting flammable vapors containing gas and air
US3920375A (en) * 1973-12-04 1975-11-18 British Domestic Appliances Burner units for gas appliances
US4054936A (en) * 1976-03-16 1977-10-18 Matsushita Electric Industrial Co., Ltd. Gas ignition device

Also Published As

Publication number Publication date
CH421871A (de) 1966-10-15
GB1056606A (en) 1967-01-25

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