Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02K—JET-PROPULSION PLANTS
  • F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
  • F02K9/95—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by starting or ignition means or arrangements
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F42—AMMUNITION; BLASTING
  • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
  • F42B3/00—Blasting cartridges, i.e. case and explosive
  • F42B3/10—Initiators therefor
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F42—AMMUNITION; BLASTING
  • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
  • F42B3/00—Blasting cartridges, i.e. case and explosive
  • F42B3/10—Initiators therefor
  • F42B3/12—Bridge initiators
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F42—AMMUNITION; BLASTING
  • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
  • F42B3/00—Blasting cartridges, i.e. case and explosive
  • F42B3/10—Initiators therefor
  • F42B3/12—Bridge initiators
  • F42B3/121—Initiators with incorporated integrated circuit
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F42—AMMUNITION; BLASTING
  • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
  • F42B3/00—Blasting cartridges, i.e. case and explosive
  • F42B3/10—Initiators therefor
  • F42B3/18—Safety initiators resistant to premature firing by static electricity or stray currents
• • 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
• • 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
  • F42C19/0823—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F42—AMMUNITION; BLASTING
  • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
  • F42B3/00—Blasting cartridges, i.e. case and explosive
  • F42B3/10—Initiators therefor
  • F42B3/14—Spark initiators

Definitions

• the present disclosure relates to an igniter. More specifically, the disclosure relates to an igniter as defined in the introductory parts of the independent claims.
• Pyrotechnic initiators e.g., bridgewire technology is often used to ignite other materials, which is more sensitive for mechanical load.
• a problem with the solutions of the prior art is fault related to detonation, i.e., unintentional detonation, and explosives that does not detonate at all. These faults may be caused since the igniter ignite at relatively low energy, and the fact that prior art solution is sensitive to, for example, electrostatic discharge (ESD), shock sensitive, temperature sensitive, i.e., sensitive to cold weather, and/or not hermetically sealed.
• ESD electrostatic discharge
• shock sensitive i.e., shock sensitive to temperature sensitive, i.e., sensitive to cold weather, and/or not hermetically sealed.
• an igniter for igniting explosives and/or pyrotechnic composition, comprising a container for housing explosives and/or pyrotechnic composition; and an electronic circuitry comprising,
• each first end is located inside the container
• each second end of the electrodes is arranged to be connected to the EMF source, and
• control circuit configured to, based on obtained data, determine if a predetermined condition/criteria for ignition is fulfilled, and the control circuit is arranged to connect the EMF source with said each second end of the conducting electrodes; wherein, each first end of the conducting electrodes is arranged to, upon obtaining EMF, provide energy into said container; and wherein the container and the electronic components of the electronic circuitry are at least partly integrated.
• the container and the electronic components of the electronic circuitry are partly integrated such that they define a common body.
• This design has a plurality of advantages. For example that reduced currents between the electric circuits and the container. Other advantages are reduced ESD sensitivity, less expensive, improved sealing, reduced shock sensitivity, reduced temperature sensitive, i.e., sensitive to cold weather, less complex construction.
• the first ends are exposed in said container, i.e., they are exposed at an inner surface of the container, thereby defining a gap between them.
• the gap has the advantages of reducing the risk of malfunction ignition of an explosive or pyrotechnic composition.
• the claimed igniter can use more environmentally friendly explosives, e.g. silverazide compared to less environmentally friendly explosives e.g., leadazide.
• more environmentally friendly silverazide compared to less environmentally friendly explosives e.g., leadazide.
• prior solutions which are using the more environmental friendly silverazide has shown increased fault and malfunction during cold weather in comparison to leadazide. This has led to the use of the latter despite the fact that leadazide is less environmental friendly.
• the European Union regulation REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) has declared restrictions regarding some chemicals, e.g., leadazide.
• the control circuit when the control circuit, based on obtained data, has determined that a predetermined conditions/criteria is fulfilled, the control circuit is configured to delay a triggering signal, before enabling detonation, e.g., the control circuit delays a triggering signal before letting the igniter be ignited.
• the first ends of the conducting electrodes are separated by a distance defining a gap, wherein said distance is in the range of 1-15 mm, preferably l-5mm.
• said electronic circuitry is mounted on a printed Circuit Board, PCB.
• the igniter comprises a housing encapsulating the PCB, the EMF-source and at least a part of the container.
• the EMF source comprises a capacitor and/or a transformer.
• the EMF source is a controllable power source.
• a controllable power source can be any type of energy source that can be controlled, e.g. the controllable power source can comprise a battery.
• the igniter comprises explosives and/or pyrotechnic composition housed in said container.
• the container houses a pyrotechnic composition.
• the container houses a primary explosive and a secondary explosive, wherein the conducting electrodes are configured to ignite the primary explosive, and the primary explosive is configured to ignite the secondary explosive.
• the container houses a primary explosive, wherein the conducting electrodes are configured to ignite the primary explosive, and the primary explosive is further configured to ignite a secondary explosive located outside the container.
• each first end of the conducting electrodes is arranged to, upon obtaining EMF, generate a spark between said first ends of the conducting electrodes
• the igniter comprises at least one sensor, wherein said sensor(s) is connected to said control circuit, and configured to provide, to said control circuit data for determining if a predetermined conditions/criteria is fulfilled.
• said predetermined condition is at least one of a pressure (for example measured by measuring activation of a piezoelectric crystal) or a predetermined position or change of position of a grenade carrying the igniter in relation to a gun barrel (for example indicating that the grenade carrying said igniter has passed through a gun barrel, which indicates that the grenade has been fired).
• the first aspect of this disclosure shows an igniter 100, for igniting explosives and/or pyrotechnic composition.
• the igniter 100 comprising a container 102 for housing explosives and/or pyrotechnic composition 102a (indicated by dots inside container 102).
• the igniter 100 also comprises electronic circuitry 104 comprising two conducting electrodes 106. Each conducting electrodes 106 having a first end 106a and a second end 106b. Each first end 106a is located inside the container 102.
• the electronic circuitry 104 further comprising an electromotive force, EMF, source, 108, wherein each second end 106b of the electrodes 106 being arranged to be connected to the EMF source 108.
• the electronic circuitry 104 further comprises a control circuit 110.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Computer Hardware Design (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Air Bags (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=90454790

Family Applications (1)

Country Status (5)

Family Cites Families (11)

• 2022
  • 2022-09-19 SE SE2200103A patent/SE546845C2/en unknown
• 2023
  • 2023-09-18 EP EP23868702.4A patent/EP4591024A1/de active Pending
  • 2023-09-18 WO PCT/SE2023/050912 patent/WO2024063684A1/en not_active Ceased
  • 2023-09-18 KR KR1020257011604A patent/KR20250067865A/ko active Pending
  • 2023-09-18 CA CA3265228A patent/CA3265228A1/en active Pending

Also Published As

Similar Documents

Legal Events