US2228873A - Electric blasting initiator - Google Patents

Electric blasting initiator Download PDF

Info

Publication number
US2228873A
US2228873A US292590A US29259039A US2228873A US 2228873 A US2228873 A US 2228873A US 292590 A US292590 A US 292590A US 29259039 A US29259039 A US 29259039A US 2228873 A US2228873 A US 2228873A
Authority
US
United States
Prior art keywords
plug
initiator
insulation
shell
electric blasting
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
US292590A
Other languages
English (en)
Inventor
English Myrle Hardt
Nydegger Roland Roswell
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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
Priority to BE461595D priority Critical patent/BE461595A/xx
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to US292590A priority patent/US2228873A/en
Application granted granted Critical
Publication of US2228873A publication Critical patent/US2228873A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • F42B3/103—Mounting initiator heads in initiators; Sealing-plugs
    • 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
    • F42B3/103—Mounting initiator heads in initiators; Sealing-plugs
    • F42B3/107—Sealing-plugs characterised by the material used

Definitions

  • the present invention relates to the art of electric blasting initiators.
  • the electric blasting initiators known to the art have been characterized by several outstanding defects. They have not been completely im-' 1 pervious to water and/or moisture, especially under storage conditions and other rigorous conditions imposed in the field. Consequently these initiator structures of the prior art have not been' sufliciently durable to withstand the physical 35 wear encoui ltered in the field, including forces tending to pull the leg wires out of the cap, such. as severe tamping and the like. Furthermore their lack of resistance to abrasion, especially at the locus of the entrance of theleg wires into 0 the mouth or the shell, has been recognized as productive of many difllculties including short circuits, accidental firing, misflres, and the like.
  • the object of the present invention is the pro-f .duction of a new and improved electric blasting initiator.
  • a further object is an electric blasting initiator-so constructed that the leg wires are firmly gripped toresist forces which would otherwise tend to pull them out of the initiator.
  • An additional object is an electric blasting initiator 0 of enhanced water resistance.
  • Another object is such an initiator with improved abrasion resistonce at the locus of the emergence of the leg wires from the mouth of the shell.
  • Figure 1 is a view in cross-section of the improved electrlc'blasting initiator of our'in- 65 vention.
  • Figure 2. is an enlarged view of the rubber-like plug formed about the leg wires bearing plastic insulation.
  • Figure 3 is a'similar view wherein the plug takes a different form.
  • Fig. 4
  • FIG. 3 is a bottom end view of the modification shown 5 in Fig. 3.
  • the numeral I designates a metal shell into which the plug 2, formed about the leg wires 3, is crimped in water impervious relationship at 4.
  • These leg wires 3 are provided with durable plastic insulation 5, preferably comprising an ethyl cellulose composition.
  • This insulation preferably terminates within the body of the plug, as shown at locus 6.
  • the rubber-like plug material is molded and/or vulcanized about both the exposed and insulated portions of the wires to form a. water impervious juncture at the interface between plug and insulation. This operation may be carried out by any molding process. We prefer to employ the pressure molding process described and claimed in our copending application, Serial Number 181,647, filed December 24. 1937, from which much of the subject matter of the present application was derived, pursuant to a requirement for division.
  • compositions comprising cellulose derivatives except nitrocellulose, compositions comprising, respectively,
  • polyvinyl acetals polyvinyl acetals, methacrylic acid derivatives, polythene compositions, and similar durable plastic and/or thermoplastic materials.
  • This material preferably is disposed about the conductor as a solid sheath, extruded sheaths being preferred.
  • the electric blasting initiator product of our invention possesses several outstanding advantages.
  • the combination of the rubber-like plug molded about the thermoplastic insulation produces an electric blasting initiator of enhanced water resistance due to the effective juncture of the plug material with the insulation as a result of the vulcanizing and/or molding process in which the plug is formed.
  • remarkably improved abrasion resistance results at the locus in which the leg wires emerge from the plug at the mouth of the shell, perhaps due to the slight, temporary give in the plug when pressure is exercised on the leg wires and due in particular to the effective seal between plug material and plastic insulation on said wires.
  • thermoferred embodiments of our invention It will be loaded shell, spaced leg wires provided with insulation comprising a thermoplastic material entering the mouth of said shell, a plug of rubberloaded shell, the closure elements comprising leg 7 wires provided with insulation comprising a thermoplastic material, a plug of rubber-like material of the character described formed about said leg wires and in contact with said thermoplastic insulation substantially in the absence of the intermingling of said thermoplastic insulation with said rubber-like composition, said wires and plug being disposed in a position closing the mouth of said shell, and a cn'mp extending around the circumference of said shell in the region enclosing said plug forcing the shell wall into and deforming said rubber-like plug to complete a water impervious juncture.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Insulated Conductors (AREA)
US292590A 1939-08-30 1939-08-30 Electric blasting initiator Expired - Lifetime US2228873A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE461595D BE461595A (zh) 1939-08-30
US292590A US2228873A (en) 1939-08-30 1939-08-30 Electric blasting initiator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US292590A US2228873A (en) 1939-08-30 1939-08-30 Electric blasting initiator

Publications (1)

Publication Number Publication Date
US2228873A true US2228873A (en) 1941-01-14

Family

ID=23125332

Family Applications (1)

Application Number Title Priority Date Filing Date
US292590A Expired - Lifetime US2228873A (en) 1939-08-30 1939-08-30 Electric blasting initiator

Country Status (2)

Country Link
US (1) US2228873A (zh)
BE (1) BE461595A (zh)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10309199B2 (en) * 2014-05-05 2019-06-04 Dynaenergetics Gmbh & Co. Kg Initiator head assembly
US10845177B2 (en) 2018-06-11 2020-11-24 DynaEnergetics Europe GmbH Conductive detonating cord for perforating gun
US10844696B2 (en) 2018-07-17 2020-11-24 DynaEnergetics Europe GmbH Positioning device for shaped charges in a perforating gun module
US11021923B2 (en) 2018-04-27 2021-06-01 DynaEnergetics Europe GmbH Detonation activated wireline release tool
US11125056B2 (en) 2013-07-18 2021-09-21 DynaEnergetics Europe GmbH Perforation gun components and system
US11225848B2 (en) 2020-03-20 2022-01-18 DynaEnergetics Europe GmbH Tandem seal adapter, adapter assembly with tandem seal adapter, and wellbore tool string with adapter assembly
US11339614B2 (en) 2020-03-31 2022-05-24 DynaEnergetics Europe GmbH Alignment sub and orienting sub adapter
US11480038B2 (en) 2019-12-17 2022-10-25 DynaEnergetics Europe GmbH Modular perforating gun system
US11648513B2 (en) 2013-07-18 2023-05-16 DynaEnergetics Europe GmbH Detonator positioning device
US11713625B2 (en) 2021-03-03 2023-08-01 DynaEnergetics Europe GmbH Bulkhead
US11753889B1 (en) 2022-07-13 2023-09-12 DynaEnergetics Europe GmbH Gas driven wireline release tool
US11808093B2 (en) 2018-07-17 2023-11-07 DynaEnergetics Europe GmbH Oriented perforating system
USD1010758S1 (en) 2019-02-11 2024-01-09 DynaEnergetics Europe GmbH Gun body
USD1019709S1 (en) 2019-02-11 2024-03-26 DynaEnergetics Europe GmbH Charge holder
US11946728B2 (en) 2019-12-10 2024-04-02 DynaEnergetics Europe GmbH Initiator head with circuit board
US11952872B2 (en) 2013-07-18 2024-04-09 DynaEnergetics Europe GmbH Detonator positioning device
US11988049B2 (en) 2020-03-31 2024-05-21 DynaEnergetics Europe GmbH Alignment sub and perforating gun assembly with alignment sub
US12000267B2 (en) 2022-09-07 2024-06-04 DynaEnergetics Europe GmbH Communication and location system for an autonomous frack system

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11125056B2 (en) 2013-07-18 2021-09-21 DynaEnergetics Europe GmbH Perforation gun components and system
US11952872B2 (en) 2013-07-18 2024-04-09 DynaEnergetics Europe GmbH Detonator positioning device
US11788389B2 (en) 2013-07-18 2023-10-17 DynaEnergetics Europe GmbH Perforating gun assembly having seal element of tandem seal adapter and coupling of housing intersecting with a common plane perpendicular to longitudinal axis
US11661823B2 (en) 2013-07-18 2023-05-30 DynaEnergetics Europe GmbH Perforating gun assembly and wellbore tool string with tandem seal adapter
US11648513B2 (en) 2013-07-18 2023-05-16 DynaEnergetics Europe GmbH Detonator positioning device
US11608720B2 (en) 2013-07-18 2023-03-21 DynaEnergetics Europe GmbH Perforating gun system with electrical connection assemblies
US11542792B2 (en) 2013-07-18 2023-01-03 DynaEnergetics Europe GmbH Tandem seal adapter for use with a wellbore tool, and wellbore tool string including a tandem seal adapter
US20210363863A1 (en) * 2014-05-05 2021-11-25 DynaEnergetics Europe GmbH Initiator head assembly
US11549343B2 (en) * 2014-05-05 2023-01-10 DynaEnergetics Europe GmbH Initiator head assembly
US10669822B2 (en) * 2014-05-05 2020-06-02 DynaEnergetics Europe GmbH Method of making an initiator head assembly
US10309199B2 (en) * 2014-05-05 2019-06-04 Dynaenergetics Gmbh & Co. Kg Initiator head assembly
US11078764B2 (en) * 2014-05-05 2021-08-03 DynaEnergetics Europe GmbH Initiator head assembly
US11634956B2 (en) 2018-04-27 2023-04-25 DynaEnergetics Europe GmbH Detonation activated wireline release tool
US11021923B2 (en) 2018-04-27 2021-06-01 DynaEnergetics Europe GmbH Detonation activated wireline release tool
US10845177B2 (en) 2018-06-11 2020-11-24 DynaEnergetics Europe GmbH Conductive detonating cord for perforating gun
US11385036B2 (en) 2018-06-11 2022-07-12 DynaEnergetics Europe GmbH Conductive detonating cord for perforating gun
US10844696B2 (en) 2018-07-17 2020-11-24 DynaEnergetics Europe GmbH Positioning device for shaped charges in a perforating gun module
US11339632B2 (en) 2018-07-17 2022-05-24 DynaEnergetics Europe GmbH Unibody gun housing, tool string incorporating same, and method of assembly
US11525344B2 (en) 2018-07-17 2022-12-13 DynaEnergetics Europe GmbH Perforating gun module with monolithic shaped charge positioning device
US10920543B2 (en) 2018-07-17 2021-02-16 DynaEnergetics Europe GmbH Single charge perforating gun
US11808093B2 (en) 2018-07-17 2023-11-07 DynaEnergetics Europe GmbH Oriented perforating system
US11773698B2 (en) 2018-07-17 2023-10-03 DynaEnergetics Europe GmbH Shaped charge holder and perforating gun
USD1019709S1 (en) 2019-02-11 2024-03-26 DynaEnergetics Europe GmbH Charge holder
USD1010758S1 (en) 2019-02-11 2024-01-09 DynaEnergetics Europe GmbH Gun body
US11946728B2 (en) 2019-12-10 2024-04-02 DynaEnergetics Europe GmbH Initiator head with circuit board
US11480038B2 (en) 2019-12-17 2022-10-25 DynaEnergetics Europe GmbH Modular perforating gun system
US11814915B2 (en) 2020-03-20 2023-11-14 DynaEnergetics Europe GmbH Adapter assembly for use with a wellbore tool string
US11225848B2 (en) 2020-03-20 2022-01-18 DynaEnergetics Europe GmbH Tandem seal adapter, adapter assembly with tandem seal adapter, and wellbore tool string with adapter assembly
US11339614B2 (en) 2020-03-31 2022-05-24 DynaEnergetics Europe GmbH Alignment sub and orienting sub adapter
US11988049B2 (en) 2020-03-31 2024-05-21 DynaEnergetics Europe GmbH Alignment sub and perforating gun assembly with alignment sub
US11713625B2 (en) 2021-03-03 2023-08-01 DynaEnergetics Europe GmbH Bulkhead
US11753889B1 (en) 2022-07-13 2023-09-12 DynaEnergetics Europe GmbH Gas driven wireline release tool
US12000267B2 (en) 2022-09-07 2024-06-04 DynaEnergetics Europe GmbH Communication and location system for an autonomous frack system

Also Published As

Publication number Publication date
BE461595A (zh)

Similar Documents

Publication Publication Date Title
US2228873A (en) Electric blasting initiator
ES8202412A1 (es) Un metodo de fabricar una junta de empaquetadura
ZA763322B (en) Impact-resistant thermoplastic molding compositions with increased stress crack resistance
US3487574A (en) Expansible sleeve
ES277177A1 (es) Un método para fabricar un recipiente de transporte
ES262909A1 (es) Mejoras introducidas en la fabricaciën de cartuchos de caza
US2515780A (en) Blasting cap manufacture
JPS5578079A (en) Superior packing material and said manufacture
US2532770A (en) Assembly of electric explosion initiators
US2382921A (en) Explosive
GB648923A (en) Improvements in metal cartridges
US2695563A (en) Electric blasting cap
US2212474A (en) Electric blasting initiator
DE1113880B (de) Patronenhuelse aus Kunststoff
US2237932A (en) Electric blasting initiator
US2431871A (en) Electric explosion initiator
US2212118A (en) Electric blasting initiator
GB191222534A (en) Improvements in the Covering of Electric Conductors with Plastic Material.
US3285172A (en) Booster device
JPS57195761A (en) Thermoplastic resin composition
US3285173A (en) Booster device
JPS54145758A (en) Manufacture of cap with packing and its product
CN208158830U (zh) 耳机线控装置以及耳机
GB527355A (en) Improvements in or relating to the manufacture of electric detonators
JPS51138740A (en) Chlorine containing vinyl resin composition