US2881703A - Spark generating device - Google Patents

Spark generating device Download PDF

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Publication number
US2881703A
US2881703A US384201A US38420153A US2881703A US 2881703 A US2881703 A US 2881703A US 384201 A US384201 A US 384201A US 38420153 A US38420153 A US 38420153A US 2881703 A US2881703 A US 2881703A
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US
United States
Prior art keywords
colloidal
electrodes
generating device
zone
spark
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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
US384201A
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English (en)
Inventor
Volpert Ludger
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Individual
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Individual
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Publication of US2881703A publication Critical patent/US2881703A/en
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Classifications

    • 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
    • H01T13/00—Sparking plugs
    • H01T13/52—Sparking plugs characterised by a discharge along a surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K5/00—Light sources using charges of combustible material, e.g. illuminating flash devices
    • F21K5/02—Light sources using charges of combustible material, e.g. illuminating flash devices ignited in a non-disrupting container, e.g. photo-flash bulb
    • F21K5/023—Ignition devices in photo flash bulbs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/12—Primers; Detonators electric

Definitions

  • This invention relates to spark generating device, and more particularly to such devices adapted to be used as ignitors for explosive mixtures, such as the priming of a shell.
  • the main object of the invention is to provide a spark generating device wherein, upon application of a relatively low. voltage, a spark of suflicient power is immediately generated to ignite the explosive mixture.
  • a further object of the invention is to simplify the construction and reduce the size and the cost price of such devices.
  • a spark generating device comprising two electrodes capable of beingconnected to the poles of a voltage source, a conductingzone disposed between the two electrodes and electrically connecting the same, said conducting zone consisting of at least one layer of a metal applied in a colloidal state to an insulating support, so that, upon application of the voltage to the electrodes, a spark immediately flashes across said conducting zone.
  • the spark generating device comprises a first central rod-shaped electrode surrounded by a second cylindrical electrode and in spaced relationship therewith, and an insulating annular sleeve arranged in the space between the two electrodes, one face of this insulating annular sleeve being coated with at least one layer of colloidal metal to form a .,conducting zone between the two electrodes.
  • Fig. 1 is a vertical axial sectional view of a spark generating device according to the invention
  • Fig. 3 is an axial section of an embodiment of the invention particularly adapted to be used as an ignitor for the priming of a shell.
  • Figs. 1 and 2 illustrate the principles of the invention.
  • the spark generating device consists of two electrodes 1 and 2 which are respectively connected to the poles of a voltage source T.
  • a switch I allows the voltage of source T to be applied to the electrodes 1 and 2 of the generating device, at the desired instant, to produce a spark.
  • the electrodes 1 and 2 are electrically connected to each other by a conducting zone P, consisting of a layer of a metal applied in a colloidal state on an insulating support 3.
  • the latter may also serve as a support for the electrodes 1 and 2, as shown.
  • the voltage capable of generating this spark on the zone P is relatively low, much lower in any case than the voltage it would be necessary to provide in order to obtain a spark of the same power if, other conditions remaining constant, the metal applied to the insulating support, in-
  • the electrodes 1 and 2 may be made either with ditferent metals (for example copper and zinc) or with the same metal (for example copper, iron, zinc, etc.).
  • the colloidal metallic zone P may consist of copper, gold, zinc or preferably silver, the latter material being available on the market in concentrated colloidal solutions.
  • the procedure to be followed in order to obtain the conducting zone P comprises thinning the concentrated colloidal solution to a diluted solution and spreading it on the insulating support 3, in the area where the zone P is desired, either with a brush or by spraying.
  • the colloidal metallic layer is then dried and, if desired, the drying operation may be activated by heating.
  • the insulating support 3 is now coated with a stable and dry layer of colloidal metal. If necessary, and according to the desired final thickness of the colloidal zone P and the extent of dilution of the solution, two or more layers of colloidal metal may be superimposed.
  • the insulating support 3 provided with the layer of colloidal metal is subjected to a heat treatment at a temperature of a few hundred degrees centigrade, preferably within the range from 600 C. to 700 C. The purpose of this heat treatment is to obtain a perfect adhesion between the colloidal layer and the insulation support and to remove any electrostatic stress between the same.
  • a spark generating device which is of particularly simple and inexpensive construction, and operates instantaneously upon application of a relatively low voltage. Moreover, since the discharge deteriorates the colloidal zone only locally, it is possible to use the spark generating device many times consecutively. For this purpose it is merely necessary to regenerate the damaged zone by applying a fresh colloidal layer in the way above described.
  • the spark generating device according to the invention is adapted to be used in many applications and particularly in those associated with flashing lamps and electric ignition for explosive mixtures.
  • Fig. 3 there is illustrated a particular embodiment of the spark generating device according to the invention, which is suitable to be used as an ignitor for the priming of a shell.
  • the spark generating device of Fig. 3 is provided with means capable of applying the voltage of the source T to the electrodes of the generator, at the right instant. If it is desired that the explosion of the shell takes place at the very instant of the impact, the head of the shell is provided with a switch consisting of two contact elements, 4 and 5 respectively, electrically insulated between them but adapted to engage each other at the instant of the imp-act. These contact elements 4 and 5 are inserted in series in the circuit of the electrodes 1 and 2, so that under the effect of the impact, they energize the spark generating device.
  • the spark generating device con sists of a first central rod-shaped electrode 1 surrounded by a second cylindrical electrode 2 in spaced'relationship therewith.
  • An insulating annular sleeve 3 is arranged in the space between the two electrodes 1 and 2, and a face of the insulating sleeve 3 is coated with a colloidal metallic layer in the manner described above, to form the conducting zone P.
  • An electrical discharge device particularly for use as an igniter for explosives, said device comprising spaced electrodes, an insulating support having a surface extending between said electrodes, a thin layer of colloidal metal covering an area of said surface extending from one of said electrodes to the other and consisting of 'a deposit of colloidal particles of metal produced by coating said surface area of said insulating support with a colloidal suspension of said metal and thereafter subjecting the coated support to heat, said layer forming an electrically conductive zone and being in electrical connection with said electrodes, at least one of said electrodes having an extended line of contact with said layer and said area covered by said layer having substantial width in a direction transverse to a line connecting said electrodes and means for applying a voltage differential of the order of 200 volts or less to said electrodes to produce instanta neously localized ionization of said colloidal metal to greatly increase the conductivity of said zone and cause an instantaneous discharge of explosive nature between said electrodes, said zone providing a multiplicity of electrical discharge paths between said electrodes to permit repeated
  • Electrodes comprise a central electrodev and an annular electrode surrounding said central electrode.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Spark Plugs (AREA)
  • Laminated Bodies (AREA)
  • Coating By Spraying Or Casting (AREA)
US384201A 1952-10-06 1953-10-05 Spark generating device Expired - Lifetime US2881703A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH735609X 1952-10-06

Publications (1)

Publication Number Publication Date
US2881703A true US2881703A (en) 1959-04-14

Family

ID=4532699

Family Applications (1)

Application Number Title Priority Date Filing Date
US384201A Expired - Lifetime US2881703A (en) 1952-10-06 1953-10-05 Spark generating device

Country Status (7)

Country Link
US (1) US2881703A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE522534A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH307005A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE973070C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR1083876A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB735609A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL105200C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059576A (en) * 1958-09-26 1962-10-23 Conax Corp Electrically fired detonator
US3082691A (en) * 1959-12-03 1963-03-26 Olin Mathieson Electric bridge
US3418372A (en) * 1960-01-29 1968-12-24 Navy Usa Preparation of 2,2',4,4',6,6'-hexanitrodiphenylamine
US3429260A (en) * 1967-02-13 1969-02-25 Sidney A Corren Miniature initiator for electroexploding device
US3462633A (en) * 1967-01-03 1969-08-19 Marcus A Mccoy Energy burst generating element
US3608492A (en) * 1969-10-02 1971-09-28 Gen Electric Ammunition high-voltage electrical ignition system
US3683811A (en) * 1970-06-22 1972-08-15 Hercules Inc Electric initiators for high energy firing currents
US3795195A (en) * 1970-01-21 1974-03-05 J Silva Electrical initiator
US3815507A (en) * 1970-01-21 1974-06-11 Olin Corp Electrical initiator
US4393779A (en) * 1977-10-20 1983-07-19 Dynamit Nobel Aktiengesellschaft Electric detonator element
US4525140A (en) * 1980-12-29 1985-06-25 Office National D'etudes Et De Recherches Aerospatiales Dit O.N.E.R.A. Ignition method and igniter device for igniting carburated gaseous mixtures
FR2599136A1 (fr) * 1986-05-22 1987-11-27 Detonix Close Corp Element de mise a feu de detonateur
US4976199A (en) * 1988-09-01 1990-12-11 Expert Explosives (Proprietary) Limited Blasting system and its method of control
FR2720494A1 (fr) * 1994-05-24 1995-12-01 Thomson Brandt Armements Amorce détonateur à éclateur intégré.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU35358A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1957-08-07

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US39542A (en) * 1863-08-18 Improvement in f
US319628A (en) * 1885-06-09 samuel eussell
AT122501B (de) * 1928-08-22 1931-04-25 Schaffler & Co Elektrischer Glühzünder.
US2424583A (en) * 1941-11-03 1947-07-29 Gunnar Edward Ferdinand Palm Plated article and method of manufacturing same
US2694016A (en) * 1950-06-01 1954-11-09 Du Pont Method of producing coated ceramic capacitor
US2719386A (en) * 1952-04-30 1955-10-04 Pittsburgh Plate Glass Co Method of electrically heating and welding glass elements

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE214705C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) *
DE216619C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) *
DE136746C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) *
DE377191C (de) * 1919-07-15 1923-06-11 Wilhelm Buschhueter Verfahren zur Darstellung von Initialzuendmasse fuer Spaltgluehzuender
US1832052A (en) * 1927-11-21 1931-11-17 Schmitt Nikolaus Electric mine firing device
GB627607A (en) * 1945-12-14 1949-08-11 Wijtze Beije Smits Improvements in or relating to low tension sparking plugs

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US39542A (en) * 1863-08-18 Improvement in f
US319628A (en) * 1885-06-09 samuel eussell
AT122501B (de) * 1928-08-22 1931-04-25 Schaffler & Co Elektrischer Glühzünder.
US2424583A (en) * 1941-11-03 1947-07-29 Gunnar Edward Ferdinand Palm Plated article and method of manufacturing same
US2694016A (en) * 1950-06-01 1954-11-09 Du Pont Method of producing coated ceramic capacitor
US2719386A (en) * 1952-04-30 1955-10-04 Pittsburgh Plate Glass Co Method of electrically heating and welding glass elements

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059576A (en) * 1958-09-26 1962-10-23 Conax Corp Electrically fired detonator
US3082691A (en) * 1959-12-03 1963-03-26 Olin Mathieson Electric bridge
US3418372A (en) * 1960-01-29 1968-12-24 Navy Usa Preparation of 2,2',4,4',6,6'-hexanitrodiphenylamine
US3462633A (en) * 1967-01-03 1969-08-19 Marcus A Mccoy Energy burst generating element
US3429260A (en) * 1967-02-13 1969-02-25 Sidney A Corren Miniature initiator for electroexploding device
US3608492A (en) * 1969-10-02 1971-09-28 Gen Electric Ammunition high-voltage electrical ignition system
US3815507A (en) * 1970-01-21 1974-06-11 Olin Corp Electrical initiator
US3795195A (en) * 1970-01-21 1974-03-05 J Silva Electrical initiator
US3683811A (en) * 1970-06-22 1972-08-15 Hercules Inc Electric initiators for high energy firing currents
US4393779A (en) * 1977-10-20 1983-07-19 Dynamit Nobel Aktiengesellschaft Electric detonator element
US4525140A (en) * 1980-12-29 1985-06-25 Office National D'etudes Et De Recherches Aerospatiales Dit O.N.E.R.A. Ignition method and igniter device for igniting carburated gaseous mixtures
FR2599136A1 (fr) * 1986-05-22 1987-11-27 Detonix Close Corp Element de mise a feu de detonateur
US4976199A (en) * 1988-09-01 1990-12-11 Expert Explosives (Proprietary) Limited Blasting system and its method of control
FR2720494A1 (fr) * 1994-05-24 1995-12-01 Thomson Brandt Armements Amorce détonateur à éclateur intégré.

Also Published As

Publication number Publication date
DE973070C (de) 1959-11-26
FR1083876A (fr) 1955-01-13
GB735609A (en) 1955-08-24
NL105200C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH307005A (fr) 1955-05-15
BE522534A (fr)

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