US3356897A - Arc plasma generator with starter - Google Patents

Arc plasma generator with starter Download PDF

Info

Publication number
US3356897A
US3356897A US426453A US42645365A US3356897A US 3356897 A US3356897 A US 3356897A US 426453 A US426453 A US 426453A US 42645365 A US42645365 A US 42645365A US 3356897 A US3356897 A US 3356897A
Authority
US
United States
Prior art keywords
high voltage
starter
electrode
housing
arc plasma
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
US426453A
Inventor
Jr Thomas A Barr
Robert F Mayo
Thomas G Roberts
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 US426453A priority Critical patent/US3356897A/en
Application granted granted Critical
Publication of US3356897A publication Critical patent/US3356897A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/48—Generating plasma using an arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T2/00—Spark gaps comprising auxiliary triggering means
    • H01T2/02—Spark gaps comprising auxiliary triggering means comprising a trigger electrode or an auxiliary spark gap
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H05H1/36—Circuit arrangements

Definitions

  • This invention relates to an arc plasma generator starter which is simple in nature and inexpensive.
  • Arc plasma generators are finding extensive use now in various aerospace research projects.
  • An arc plasma can provide a high temperature, high velocity flow which is useful for testing missile nosecones, or may be employed for flame plating.
  • the starting, or ignition of arc plasmas in prior art devices has been difficult.
  • An object 'of the present invention is to overcome the above difliculty.
  • Another object of the invention is to provide an inexpensive arc plasma generator starter.
  • a further object is to provide an arc plasma generator starter which is simple to construct.
  • a still further object is to provide an arc plasma generator starter which may be accurately timed in operation.
  • Yet another object is to provide means whereby a plurality arc plasma generator starters may be accurately and simultaneously activated.
  • a high voltage as from a Tesla coil, may be used to cause a spark discharge within the arc plasma chamber, which discharge provides a conductive medium through which the arc plasma may be established and maintained.
  • This scheme has the disadvantage that the high voltage from the Tesla coil can damage the insulators of the arc plasma chamber and may eventually allow conductive paths to form through the insulators.
  • the invention is a starter for an arc plasma generator, which starter employs the ablation of a dielectric plastic by a high voltage spark-discharge to produce a small-scale plasma discharge.
  • FIGURE 1 is a view, partly in section, of the starter in accordance with the invention.
  • the normal ground electrode (not shown) of the plug is ground or filed off and a plastic insert 14 is inserted around the center insulator 12.
  • the numeral 12a designates the exterior extension of the center insulator I2
  • 11a is the exterior extension of center electrode 11, to which high voltage lead 15 with insulating boot 15a is connected.
  • the arc plasma generator metal housing wall is member 16, and member 17 is a noncorroding metal gasket inserted between the insert 14 and the bottom of a bore in which body 13 of the starter plug is screwed.
  • a bore 18 passes between the electrode 11 and the interior of the housing 16.
  • the insert 14, in the specific embodiment, is made of Lucite, but many other substances would be proper. Polyethylene or other linear polymers could be used, as well as Teflon and other flurocarbon polymers. Other polymers or substances may be used, the requirements being: a dielectric which does not shatter readily under the electrical or other stresses'developed in the starter, which is readily vaporizable by a spark discharge and which leaves no significant ash upon vaporization.
  • Gasket 17 may be brass, copper, stainless steel, tantalum or some other noncorroding metal. The gasket is not absolutely necessary, but is convenient because it prevents wear on housing 16.
  • FIGURE 2 shows the spark plug assembly in place in the housing 16, with the set up of the arc plasma generator shown.
  • the are plasma generator is known in the artv and consists of an anode 19 and a cathode 16 (the housing) surrounded by focusing electromagnets 21. Insulator 22 separates the electrodes 19 and 16.
  • a high voltage from high voltage supply 23 is applied between the electrodes but is ordinarily insufiicient to start an arc therebetween.
  • High voltage supply 23 includes a high voltage terminal 23a connected to cathode 19, and a ground (negative) terminal 231) connected to housing member 16 (the anode of the generator).
  • a sparking circuit 24, with a high voltage terminal 24a and a ground (negative) terminal 24 has its high voltage terminal connected to high voltage lead 15 by lead 27, and its ground terminal connected to housing member 16.
  • the details of circuit 24 are shown in the dotted line box labeled 24 in FIGURE 3.
  • FIGURE 3 shows a high voltage supply 240 connected to a solenoid operated switch S When in the position as shown, S allows capacitor C to charge through conductor 25 and conductor 26. When moved by solenoid 29 through insulator 29a to its other position, switch S allows the capacitor C to discharge through the spark lug 10 by way of conductor 28 and conductor 27.
  • the inductance L acts as a choke and prevents a high voltage surge from appearing on the ground conductor 26 as the capacitor C discharges
  • Switch S is a safety shorting switch for C and is normally closed when the device is not in use, and normally open when the device is in use.
  • Terminals 24a and 24b correspond to like designated terminals in FIGURE 2.
  • FIGURE 3 is drawn to show two spark plugs connected to the firing circuit, but obviously one, or more than two spark plugs could be connected to be fired simultaneously. With the arrangement as shown, the plugs are fired at substantially the same instant.
  • the spark plug fires, a portion of the plastic insert 14 is ablated and discharged as a plasma through the passage 18 into the interior of the housing 16. This plasma increases the conductivity of the space between the anode 19 and cathode 16, and allows an arc to ignite between them. Once such are is started, the high voltage supply 23 is of sufiicient voltage to maintain the arc.
  • FIGURE 4 shows a modified form of FIGURE. 1, but with a thyratron being used to complete the discharge circuit for the capacitor C. Operation of the FIGURE 4 system is the same as that of FIGURE 3, except that switch S is ganged to switch S but is so arranged that S closes after S breaks but before it can make the conductor 28 contact. This last contact for S could be omitted in this embodiment. The closure of S applies voltage from battery B to the thyratron 30 to cause it to conduct.
  • FIGURE shows a further modified form of the basic circuit of FIGURE 3.
  • Capacitor C is charged through conductors 25 and 31 and, when switch S is operated from right to left, discharges through conductors 25 and 32.
  • Inductor L acts as a choke to prevent a high voltage from appearing on conductor 33 when C discharges.
  • the operation of the circuit is otherwise similar to the FIG- URE 3 circuit.
  • FIGURE 6 shows a modified form of FIGURE 5 in which a thyratron 30' is used as a switch for applying the high voltage to the starters.
  • the operation of the circuit is substantially the same as that of FIGURE 5, except that switch S is ganged to switch S and makes contact after switch S opens but before S can make with its alternate contact. If desired, such alternate contact could be omitted.
  • switch S is ganged to switch S and makes contact after switch S opens but before S can make with its alternate contact. If desired, such alternate contact could be omitted.
  • both electrodes of the spark plugs are at ground potential during the charging of capacitor C, except for the small voltage developed across L or L during charging, such voltage being due to the IR drop across the finite resistances of the inductors.
  • the high voltage power supplies 23 and 24 have been shown as separate, but could obviously be tapped from the same high voltage supply source. Also, the voltage of the battery B could be tapped (with, for example,,a voltage divider) from the same source as 23 and 24. If desired, a current limiter for the charging current of C could be provided, in any one of several known ways.
  • Solenoid 27 could be electrically, mechanically, hydraulically, pneumatically or manually operated to activate rod 29, and no specific means is shown for its operation.
  • Thyratrons 30 and 30 could be fired by a separate accurately timed device (not shown), if desired.
  • An arc plasma generator having a housing with a first space therein; a centrally disposed electrode penetrating said space, but insulated from said housing; a first high voltage source having a first ground terminal, connected to said housing and a first high voltage terminal, connected to said electrode, a starting device having an outer electrode with a second space therewithin, and an inner electrode penetrating said second space, but insulated from said outer electrode; said other electrode connected to said housing, with a passageway between said spaces; a second high voltage source having a second ground terminal, connected to said housing and a second high voltage terminal, connected to said inner electrode.
  • the electrodes of said sparking device comprise a first rod shaped electrode and a second coaxial cylindrical electrode surrounding said first electrode and in which said dielectric surrounds one end of said first electrode, except for a coaxial perforation of less diameter than the first electrode.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Plasma Technology (AREA)

Description

T. A. BARR, JR.. ETAL 3,356,897
ARC PLASMA GENERATOR WITH STARTER Dec. 5, 1967 Filed Jan. 18, 1965 5 Sheets-Sheet 1 v a I2 A :7 l5 \w I I8 Ila I20 I3&
FIG. I
SPARKING 1 CIRCUIT -LLZ/ HIGH 23o VOLTAGE 23 FIG. 2
Thomas A. Bcrr,J|'. Robert F. Mayo Thomas G. Roberts, INVENTORS:
T. A. BARR, JR.. ETAL ARC PLASF-ZA GENERATOR WITH STARTER Filed Jan. 18, 1965 5 Sheets-Sheet 2 HIGH VOLTAGE 0.0. POWER SUPPLY I I U I r SI \24C I I I SOLENOID f #25 i 26A 28 0 I l I F STARTER I \L I: I A II I I I I 27 i K I 24b F r l. "I
I I m a I A) I L HI SC-LENOID HIGH VOLTAGE 0.0 POWER SUPPLY Thomas A. Borr,J|:
Robert F. Mayo Thomas G. Roberts,
INVENTORS. Z y
WE M 4 Dec. 5, 1967 T. A. BARR, JR, ETAL 3,355,897
I ARC PLASMA GENERATOR WITH STARTER 7 Filed Jan. 18, 1965 5 Sheets-Sheet HIGH VOLTAGE D.C. POWER SUPPLY SOLENOID T] I kzgA 7 s HIGH VOLTAGE 0.0 POWER SUPPLY SOLENOID Thgmas A. Burr,dr.
R0 err F. Mayo 7 FIG-6 Thomas G.Roberfs,
1NVENTORS.
United States Patent 3,356,897 ARC PLASMA GENERATOR WITH STARTER Thomas A. Barr, Jr., Robert F. Mayo, and Thomas G. Roberts, Huntsville, Ala., assignors to the United States of America as represented by the Secretary of the Army Filed Jan. 18, 1965, Ser. No. 426,453 2 Claims. (Cl. 315-238) ABSTRACT OF THE DISCLOSURE An arc plasma generator with a spark-plug type starter. The starter has a vaporizable dielectric between its electrodes, and injects vapor from the dielectric between the arc electrodes of the generator. This vapor allows an arc to be readily struck between the electrodes of the generator.
The invention described herein may be manufactured and used by or for the Government for governmental purposes without the payment of any royalty thereon.
This invention relates to an arc plasma generator starter which is simple in nature and inexpensive.
Arc plasma generators are finding extensive use now in various aerospace research projects. An arc plasma can provide a high temperature, high velocity flow which is useful for testing missile nosecones, or may be employed for flame plating. The starting, or ignition of arc plasmas in prior art devices has been difficult.
An object 'of the present invention is to overcome the above difliculty.
"Another object of the invention is to provide an inexpensive arc plasma generator starter.
A further object is to provide an arc plasma generator starter which is simple to construct.
A still further object is to provide an arc plasma generator starter which may be accurately timed in operation.
Yet another object is to provide means whereby a plurality arc plasma generator starters may be accurately and simultaneously activated.
Many are plasma generators operate in a high vacuum and some means must be provided to form a conductive path through the vacuum before an arc can be established. In the past, this has been done by any one of several different ways. A high voltage, as from a Tesla coil, may be used to cause a spark discharge within the arc plasma chamber, which discharge provides a conductive medium through which the arc plasma may be established and maintained.
This scheme has the disadvantage that the high voltage from the Tesla coil can damage the insulators of the arc plasma chamber and may eventually allow conductive paths to form through the insulators.
Other ways in which the arc plasma may be started are by the use of an exploding wire or cap within the arc chamber or by the use of a piece of steel wool between the arc electrodes to provide a low resistivity path for starting. Each of these ways has the disadvantage of requiring manual reloading after each starting, and they are somewhat diificult to control in time. The present invention requires only occasional reloading, can be accurately timed and does not harm the arc chamber insulators.
Basically, the invention is a starter for an arc plasma generator, which starter employs the ablation of a dielectric plastic by a high voltage spark-discharge to produce a small-scale plasma discharge.
The invention may be understood by reference to the drawings, in which the same numerals are used to designate the same parts appearing in different figures wherein:
FIGURE 1 is a view, partly in section, of the starter in accordance with the invention;
' ing a center electrode 11 and center insulator 12 which extends beyond the threaded metal body 13 of the plug. The normal ground electrode (not shown) of the plug is ground or filed off and a plastic insert 14 is inserted around the center insulator 12. The numeral 12a designates the exterior extension of the center insulator I2, and 11a is the exterior extension of center electrode 11, to which high voltage lead 15 with insulating boot 15a is connected. The arc plasma generator metal housing wall is member 16, and member 17 is a noncorroding metal gasket inserted between the insert 14 and the bottom of a bore in which body 13 of the starter plug is screwed. A bore 18 passes between the electrode 11 and the interior of the housing 16. The insert 14, in the specific embodiment, is made of Lucite, but many other substances would be proper. Polyethylene or other linear polymers could be used, as well as Teflon and other flurocarbon polymers. Other polymers or substances may be used, the requirements being: a dielectric which does not shatter readily under the electrical or other stresses'developed in the starter, which is readily vaporizable by a spark discharge and which leaves no significant ash upon vaporization. Gasket 17 may be brass, copper, stainless steel, tantalum or some other noncorroding metal. The gasket is not absolutely necessary, but is convenient because it prevents wear on housing 16.
FIGURE 2 shows the spark plug assembly in place in the housing 16, with the set up of the arc plasma generator shown. The are plasma generator is known in the artv and consists of an anode 19 and a cathode 16 (the housing) surrounded by focusing electromagnets 21. Insulator 22 separates the electrodes 19 and 16. A high voltage from high voltage supply 23 is applied between the electrodes but is ordinarily insufiicient to start an arc therebetween. High voltage supply 23 includes a high voltage terminal 23a connected to cathode 19, and a ground (negative) terminal 231) connected to housing member 16 (the anode of the generator). A sparking circuit 24, with a high voltage terminal 24a and a ground (negative) terminal 24 has its high voltage terminal connected to high voltage lead 15 by lead 27, and its ground terminal connected to housing member 16. The details of circuit 24 are shown in the dotted line box labeled 24 in FIGURE 3.
FIGURE 3 shows a high voltage supply 240 connected to a solenoid operated switch S When in the position as shown, S allows capacitor C to charge through conductor 25 and conductor 26. When moved by solenoid 29 through insulator 29a to its other position, switch S allows the capacitor C to discharge through the spark lug 10 by way of conductor 28 and conductor 27. The inductance L acts as a choke and prevents a high voltage surge from appearing on the ground conductor 26 as the capacitor C discharges Switch S is a safety shorting switch for C and is normally closed when the device is not in use, and normally open when the device is in use. Terminals 24a and 24b correspond to like designated terminals in FIGURE 2. FIGURE 3 is drawn to show two spark plugs connected to the firing circuit, but obviously one, or more than two spark plugs could be connected to be fired simultaneously. With the arrangement as shown, the plugs are fired at substantially the same instant.
Referring again to FIGURE 2, Whenthe spark plug fires, a portion of the plastic insert 14 is ablated and discharged as a plasma through the passage 18 into the interior of the housing 16. This plasma increases the conductivity of the space between the anode 19 and cathode 16, and allows an arc to ignite between them. Once such are is started, the high voltage supply 23 is of sufiicient voltage to maintain the arc.
FIGURE 4 shows a modified form of FIGURE. 1, but with a thyratron being used to complete the discharge circuit for the capacitor C. Operation of the FIGURE 4 system is the same as that of FIGURE 3, except that switch S is ganged to switch S but is so arranged that S closes after S breaks but before it can make the conductor 28 contact. This last contact for S could be omitted in this embodiment. The closure of S applies voltage from battery B to the thyratron 30 to cause it to conduct.
FIGURE shows a further modified form of the basic circuit of FIGURE 3. Capacitor C is charged through conductors 25 and 31 and, when switch S is operated from right to left, discharges through conductors 25 and 32. Inductor L acts as a choke to prevent a high voltage from appearing on conductor 33 when C discharges. The operation of the circuit is otherwise similar to the FIG- URE 3 circuit.
FIGURE 6 shows a modified form of FIGURE 5 in which a thyratron 30' is used as a switch for applying the high voltage to the starters. The operation of the circuit is substantially the same as that of FIGURE 5, except that switch S is ganged to switch S and makes contact after switch S opens but before S can make with its alternate contact. If desired, such alternate contact could be omitted. When 8;; makes contact, voltage from battery B is applied to the grid of 30' and the thyratron conducts, allowing discharge of capacitor C.
In ach of the embodiments of FIGURES 3, 4, 5 and 6, it should be noted that both electrodes of the spark plugs are at ground potential during the charging of capacitor C, except for the small voltage developed across L or L during charging, such voltage being due to the IR drop across the finite resistances of the inductors.
While specific embodiments of the invention have been disclosed, other embodiments may be obvious to one skilled in the art.
While a modified automobile spark plug has been specifically described, other types of sparking plugs may be used, if the required specifications are met.
The high voltage power supplies 23 and 24 have been shown as separate, but could obviously be tapped from the same high voltage supply source. Also, the voltage of the battery B could be tapped (with, for example,,a voltage divider) from the same source as 23 and 24. If desired, a current limiter for the charging current of C could be provided, in any one of several known ways.
Solenoid 27 could be electrically, mechanically, hydraulically, pneumatically or manually operated to activate rod 29, and no specific means is shown for its operation.
Thyratrons 30 and 30 could be fired by a separate accurately timed device (not shown), if desired.
While a specific use has been described for this starter, it may find other uses, such as a blasting cap for explosives, or a Vernier rocket for a space craft. The discharge from the starter could be used to cause a circuit interruption in response to high voltage surge on the starter, and could be used as a circuit break and/or surge protector.
We claim:
1. An arc plasma generator having a housing with a first space therein; a centrally disposed electrode penetrating said space, but insulated from said housing; a first high voltage source having a first ground terminal, connected to said housing and a first high voltage terminal, connected to said electrode, a starting device having an outer electrode with a second space therewithin, and an inner electrode penetrating said second space, but insulated from said outer electrode; said other electrode connected to said housing, with a passageway between said spaces; a second high voltage source having a second ground terminal, connected to said housing and a second high voltage terminal, connected to said inner electrode.
2. The starter of claim 1 in which the electrodes of said sparking device comprise a first rod shaped electrode and a second coaxial cylindrical electrode surrounding said first electrode and in which said dielectric surrounds one end of said first electrode, except for a coaxial perforation of less diameter than the first electrode.
References Cited UNITED STATES PATENTS 2,093,848 9/1937 Randolph et al. 3l3l30 X 2,125,035 7/1938 Smits 315-209 2,392,192 1/ 1946 Robinson 315-2-09 2,900,547 8/1959 Engel 313- 3,004,184 10/1961 Deans 313-131 X 3,049,644 8/1962 Bowlus et al. 315--209 3,287,590 11/1966 Andre 313- JOHN W. HUCKERT, Primary Examiner.
A. J. JAMES, Assistant Examiner.

Claims (1)

1. AN ARC PLASMA GENERATOR HAVING A HOUSING WITH A FIRST SPACE THEREIN; A CENTRALLY DISPOSED ELECTRODE PENETRATING SAID SPACE, BUT INSULATED FROM SAID HOUSING; A FIRST HIGH VOLTAGE SOURCE HAVING A FIRST GROUND TERMINAL, CONNECTED TO SAID HOUSING AND A FIRST HIGH VOLTAGE TERMINAL, CONNECTED TO SAID ELECTRODE, A STARTING DEVICE HAVING AN OUTER ELECTRODE WITH A SECOND SPACE THEREWITH, AND AN INNER ELECTRODE PENETRATING SAID SECOND SPACE, BUT INSULATED FROM SAID OUTER ELECTRODE; SAID OTHER ELECTRODE CONNECTED TO SAID HOUSING, WITH A PASSAGEWAY BETWEEN SAID SPACES; A SECOND HIGH VOLTAGE SOURCE HAVING A SECOND GROUND TERMINAL, CONNECTED TO SAID HOUSING AND A SECOND HIGH VOLTAGE TERMINAL, CONNECTED TO SAID INNER ELECTRODE.
US426453A 1965-01-18 1965-01-18 Arc plasma generator with starter Expired - Lifetime US3356897A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US426453A US3356897A (en) 1965-01-18 1965-01-18 Arc plasma generator with starter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US426453A US3356897A (en) 1965-01-18 1965-01-18 Arc plasma generator with starter

Publications (1)

Publication Number Publication Date
US3356897A true US3356897A (en) 1967-12-05

Family

ID=23690864

Family Applications (1)

Application Number Title Priority Date Filing Date
US426453A Expired - Lifetime US3356897A (en) 1965-01-18 1965-01-18 Arc plasma generator with starter

Country Status (1)

Country Link
US (1) US3356897A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3486062A (en) * 1969-01-13 1969-12-23 Gen Electric Electrohydraulic shock-wave generating apparatus with directing and shaping means
US3521105A (en) * 1967-09-25 1970-07-21 Harry E Franks Ignition device having elongated planar parallel electrodes between which a pulse of ionizable gas is passed
US3714510A (en) * 1971-03-09 1973-01-30 Hughes Aircraft Co Method and apparatus for ignition of crossed field switching device for use in a hvdc circuit breaker
FR2418541A1 (en) * 1978-02-27 1979-09-21 Comp Generale Electricite Electrical discharge generator into strip-line esp. gas laser - has toroidal spark gap, gas tight and semi-circular sealed enclosure set in line
US4714860A (en) * 1985-01-30 1987-12-22 Brown Ian G Ion beam generating apparatus
US4924102A (en) * 1987-12-25 1990-05-08 Mitsubishi Denki Kabushiki Kaisha Apparatus for generating negatively charged species
US4939425A (en) * 1987-06-12 1990-07-03 U.S. Philips Corporation Four-electrode ion source
US20060175306A1 (en) * 2005-02-07 2006-08-10 Pratt & Whitney Canada Corp. Variable arc gap plasma igniter
US20100284825A1 (en) * 2007-01-19 2010-11-11 Land Iii H Bruce Solid State Supersonic Flow Actuator and Method of Use
US20160121418A1 (en) * 2012-01-25 2016-05-05 Gordon Hanka Welder Powered Arc Starter

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2093848A (en) * 1933-05-22 1937-09-21 Donald W Randolph Method and apparatus for producing ignition
US2125035A (en) * 1935-10-18 1938-07-26 Smits Wytze Beye Electric ignition system and sparking plug for internal combustion engines
US2392192A (en) * 1946-01-01 Ignition system
US2900547A (en) * 1956-08-03 1959-08-18 Engel Edward Spark plugs and the like
US3004184A (en) * 1958-12-05 1961-10-10 Babcock & Wilcox Ltd Surface discharge multiple gap sparking plug
US3049644A (en) * 1960-05-02 1962-08-14 Chrysler Corp Ignition system
US3287590A (en) * 1961-10-20 1966-11-22 Euratom Electric spark gap with insulation which maintains its high insulative character throughout its operation

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2392192A (en) * 1946-01-01 Ignition system
US2093848A (en) * 1933-05-22 1937-09-21 Donald W Randolph Method and apparatus for producing ignition
US2125035A (en) * 1935-10-18 1938-07-26 Smits Wytze Beye Electric ignition system and sparking plug for internal combustion engines
US2900547A (en) * 1956-08-03 1959-08-18 Engel Edward Spark plugs and the like
US3004184A (en) * 1958-12-05 1961-10-10 Babcock & Wilcox Ltd Surface discharge multiple gap sparking plug
US3049644A (en) * 1960-05-02 1962-08-14 Chrysler Corp Ignition system
US3287590A (en) * 1961-10-20 1966-11-22 Euratom Electric spark gap with insulation which maintains its high insulative character throughout its operation

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3521105A (en) * 1967-09-25 1970-07-21 Harry E Franks Ignition device having elongated planar parallel electrodes between which a pulse of ionizable gas is passed
US3486062A (en) * 1969-01-13 1969-12-23 Gen Electric Electrohydraulic shock-wave generating apparatus with directing and shaping means
US3714510A (en) * 1971-03-09 1973-01-30 Hughes Aircraft Co Method and apparatus for ignition of crossed field switching device for use in a hvdc circuit breaker
FR2418541A1 (en) * 1978-02-27 1979-09-21 Comp Generale Electricite Electrical discharge generator into strip-line esp. gas laser - has toroidal spark gap, gas tight and semi-circular sealed enclosure set in line
US4714860A (en) * 1985-01-30 1987-12-22 Brown Ian G Ion beam generating apparatus
US4939425A (en) * 1987-06-12 1990-07-03 U.S. Philips Corporation Four-electrode ion source
US4924102A (en) * 1987-12-25 1990-05-08 Mitsubishi Denki Kabushiki Kaisha Apparatus for generating negatively charged species
US20060175306A1 (en) * 2005-02-07 2006-08-10 Pratt & Whitney Canada Corp. Variable arc gap plasma igniter
US8044319B2 (en) * 2005-02-07 2011-10-25 Pratt & Whitney Canada Corp. Variable arc gap plasma igniter
US20100284825A1 (en) * 2007-01-19 2010-11-11 Land Iii H Bruce Solid State Supersonic Flow Actuator and Method of Use
US7988103B2 (en) 2007-01-19 2011-08-02 John Hopkins University Solid state supersonic flow actuator and method of use
US20160121418A1 (en) * 2012-01-25 2016-05-05 Gordon Hanka Welder Powered Arc Starter

Similar Documents

Publication Publication Date Title
US2696191A (en) Electrically operated primer
US4493297A (en) Plasma jet ignition device
US3356897A (en) Arc plasma generator with starter
US3842818A (en) Ignition devices
US2708877A (en) Low tension igniter for explosives
US3351012A (en) Explosive bridgewire initiators
SE517737C2 (en) Cartridge with electrothermal ignition device
GB740195A (en) Improvements relating to projectiles and particularly hollow charge projectiles
US3117519A (en) Electric initiators for explosives, pyrotechnics and propellants
US3288958A (en) Electromagentic radiation proof plug and receptacle
US3343366A (en) Spark discharge monitoring device
US3245353A (en) Series spark gap initiator
GB960186A (en) Electrically triggered squib
US3052185A (en) Electric switch
US3728967A (en) Tri-pri three contact primer
GB660225A (en) Improvements in apparatus for firing pyrotechnic devices
CN103925856A (en) Explosion-wire detonating device
US3362158A (en) Arc ignition system
US3372642A (en) Internal firing switch means for electrically fuzed projectiles
US2909695A (en) Coaxial magnetohydrodynamics switch device
US3320889A (en) Detonation initiator
US2935648A (en) Bridge wire triggered spark gap
US3024728A (en) Delay electric explosion initiator
US3828677A (en) Electric ignition element with secondary ignition capability
US3314361A (en) Miniature triggered gap in coaxial squib