US3762087A - Electro-mechanical release device for percussion priming of cartridges - Google Patents

Electro-mechanical release device for percussion priming of cartridges Download PDF

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Publication number
US3762087A
US3762087A US00259573A US3762087DA US3762087A US 3762087 A US3762087 A US 3762087A US 00259573 A US00259573 A US 00259573A US 3762087D A US3762087D A US 3762087DA US 3762087 A US3762087 A US 3762087A
Authority
US
United States
Prior art keywords
armature
striker pin
cartridge
spring
magnet
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
US00259573A
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English (en)
Inventor
H Strubin
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
Bbc Brown Boveri & Cie
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 Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Application granted granted Critical
Publication of US3762087A publication Critical patent/US3762087A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
    • F41A19/58—Electric firing mechanisms
    • F41A19/59—Electromechanical firing mechanisms, i.e. the mechanical striker element being propelled or released by electric means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C7/00—Fuzes actuated by application of a predetermined mechanical force, e.g. tension, torsion, pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current

Definitions

  • ABSTRACT A release device for percussion priming of a propellant charge contained within a cartridge includes a striker pin for a detonator cap that primes the cartridge.
  • the striker pin is secured to the armature element of a holding magnet and is held in a position of rest away from the cap by magnetic attraction of the armature to a pole shoe ofthe magnet against a counter mechanical force created by compression of a spring. Release of the striker pin is effected by a temporary weakening of the effective magnetic field produced by the holding magnet which in turn releases the armature and striker pin assembly for movement under the force stored in the compressed spring to detonate the cap.
  • the present invention relates to an improved release device for percussion priming of propellant charges, particularly for switchgear drives.
  • the problem underlying the invention consists in providing a simple, inexpensive release device for priming cartridges provided with detonator caps, wherein at the same time a short inherent response time of the release device can be achieved.
  • this is achieved through the fact that the striker pin which, in the position of rest, is under the action of a stressed striker spring, is held in position by a holding magnet with the aid of an armature connected to the striker pin, the dropping of the armature being effected through a brief weakening of the holding magnet field.
  • the striker pin which, in the position of rest, is under the action of a stressed striker spring, is held in position by a holding magnet with the aid of an armature connected to the striker pin, the dropping of the armature being effected through a brief weakening of the holding magnet field.
  • 1 designates a holding magnet 1 which produces the magnetic force necessary to hold the strike pin assembly in a rest position until weakened by creation of a counter magnetic force.
  • Magnet 1 of the permanent type is provided with a soft iron pole shoe la secured thereto.
  • Attractable to the shoe la is an armature 3 which is mounted for guided longitudinal movement within a central opening provided in an iron base plate 10, and depending from this armature is a striker pin 6 surrounded by and spaced from a sleeve 30 provided at its lower end with a flange 3b.
  • a helical compression spring 2 Located between flange 3b and the underside of base plate 10 is a helical compression spring 2 which is in a compressed state when armature 3 is held by magnetic force in its upward, rest position against the pole shoe 1a.
  • a tubular housing 14 depending from the lower face of base plate 10 serves to enclose the striker pin assem bly and also serves to support at its lower end a mount 9 having a bore therein aligned with the striker pin 6 for receiving the end portion of a cartridge 8 and its detonator cap 7.
  • the chemical explosive forces released into space 15 by firing the cartridge 8 serve to drive pistons, not illustrated, which are mechanically coupled to and actuate the control mechanism of the electrical switchgear.
  • the mount 9 includes an upstanding cylindrical bored part 9a which extends partly within the sleeve 3a and receives the striker pin 6 so as to properly guide the latter in its longitudinal movement between the upward rest position depicted in the drawing and the lower released position in which the end of pin 6 strikes against and mechanically detonates the primer cap 7.
  • Mount 9 is also provided with a passage 911 leading from space 15 into the lower end of guide part 9a so that part of the explosion gases in a pressurized state pass through this passage and come beneath the lower end of the striker pin 6.
  • the striker pin 6 and its armature 3 are held in the rest position due to the attractive force produced by the holding magnet 1.
  • the path of the magnetic flux produced by magnet 1 passes downward from pole shoe la through armature 10, then laterally outward through base plate 10, then upward through an iron wall 11 which houses the magnet assembly and then laterally inward through an iron closure cap 12 which contacts the upper side of magnet 1.
  • the lower portion of pole shoe 1a tapers inwardly to a central circular end face of the same diameter as armature 3 which is held to, or released from it.
  • An annular support 13 of non-magnetic material resting upon the base plate 10 serves as a support for the shoe la, and support 13 in conjunction with closure cap 12 and base plate 10 serve to hold the magnet l and its shoe la in a fixed position.
  • Surrounding magnet 1 are two release coils 4 and 5 provided for effecting a reduction in magnetic attractive force necessary to release armature 3. If a control voltage pulse is applied briefly to one of these two coils (one always functions as a reserve), it generates a magnetic flux which has a direction counter to that produced by permanent magnet 1 with the result that the net attractive magnetic flux acting upon armature 3 is weakened to the point where pole shoe la is no longer able to hold armature 3 against the counter force stored mechanically within the compressed spring 2 with the result that armature 3 releases and striker pin 6 is driven downwardly to detonate the primer cap 7 and fire cartridge 8.
  • the explosion gases thus produced in space 15 which can be imagined as a cylinder drive pistons which in turn actuate the control mechanism of the switchgear, or perform some other desired function.
  • Part of the explosion gases are also returned through passage 9b into the lower end of the cylindrical guide part 9a at a point beneath the striker pin 6 and push the latter together with armature 3 back to the rest position, recompressing spring 2, and holding the armature against pole shoe la until the counter flux which had been produced by the brief pulse of current applied to either coil 4 or coil 5 has subsided to a value at which the permanent flux is once more sufficient to hold the armature in its attracted position.
  • a release device for percussion priming of a propellant charge contained within a cartridge comprising a holding magnet, an armature for the magnet, a striker pin assembled with said armature, said armature being normally attracted to said magnet by the force of the magnetic field produced by it thus to hold said armature and striker pin in a position of rest away from a detonator cap used to prime the cartridge, spring means coupled to said armature and striker pin assembly, said spring means being stressed when said armature and striker pin assembly is in said rest position thereby to store a counter mechanical force tending to displace said armature and striker pin assembly in the direction of said detonator cap, and means for temporarily weakening the magnetic force produced by said holding magnet thereby resulting in a release of said armature and striker pin assembly which then moves under the action of the counter force stored in said spring means to strike and detonate the cap.
  • a release device for percussion priming of a propellant charge contained within a cartridge by means of a detonator cap comprising a holding magnet structure including a base plate of magnetic material, a permanent magnet and pole shoe thereon supported by said base plate, an armature mounted within an opening through said base plate for attraction into engagement with said pole shoe, a striker pin depending from said armature, a sleeve surrounding said striker pin and likewise depending from said armature, a compression spring surrounding said sleeve, one end of said spring being fixed in position and the other end thereof engaging said sleeve, a tubular housing surrounding said spring means, one end of said housing being secured to said base plate and the other end having a mount secured thereto for receiving the cartridge and detonator cap associated therewith, said mount including a cylindrical bored portion extending partly into said sleeve and receiving said striker pin so as to guide the latter in its movement toward said detonator cap, said striker pin being normally held in a position of rest away from said de

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
US00259573A 1971-09-13 1972-06-05 Electro-mechanical release device for percussion priming of cartridges Expired - Lifetime US3762087A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1336871A CH535485A (de) 1971-09-13 1971-09-13 Auslösevorrichtung für das Schlagzünden von Patronen, insbesondere für Schaltgeräteantriebe

Publications (1)

Publication Number Publication Date
US3762087A true US3762087A (en) 1973-10-02

Family

ID=4391813

Family Applications (1)

Application Number Title Priority Date Filing Date
US00259573A Expired - Lifetime US3762087A (en) 1971-09-13 1972-06-05 Electro-mechanical release device for percussion priming of cartridges

Country Status (9)

Country Link
US (1) US3762087A (enrdf_load_stackoverflow)
JP (1) JPS4838000A (enrdf_load_stackoverflow)
AT (1) AT308885B (enrdf_load_stackoverflow)
CH (1) CH535485A (enrdf_load_stackoverflow)
DE (1) DE2148110A1 (enrdf_load_stackoverflow)
FR (1) FR2152836A1 (enrdf_load_stackoverflow)
GB (1) GB1373604A (enrdf_load_stackoverflow)
IT (1) IT967334B (enrdf_load_stackoverflow)
NL (1) NL7212299A (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4757629A (en) * 1984-12-06 1988-07-19 Austin Trevor A Gun firing mechanism
US20070084102A1 (en) * 2003-05-02 2007-04-19 O'dwyer James M Combined electrical mechanical firing systems
US20070215135A1 (en) * 2003-09-16 2007-09-20 Aj Acquisition I Llc Electronic paintball marker
US20100097166A1 (en) * 2008-10-16 2010-04-22 Claus-Peter Hasel Solenoid and actuating element with solenoid
US8915004B1 (en) * 2011-10-24 2014-12-23 F. Richard Langner Systems and methods for a firing pin
US9200881B1 (en) 2011-10-24 2015-12-01 F. Richard Langner Systems and methods for an improved firing assembly
US20200025471A1 (en) * 2016-01-11 2020-01-23 Martin Grier Firearm system and method
CN111765805A (zh) * 2019-04-02 2020-10-13 南京理工大学 基于线圈驱动击发的电磁自动步枪
GB2595313A (en) * 2020-05-14 2021-11-24 Eaton Intelligent Power Ltd Disconnect device with magnetic switch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5832626A (ja) * 1981-08-21 1983-02-25 Asahi Glass Co Ltd ポリウレタンポリウレアエラストマ−成形品の製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1844865A (en) * 1930-12-10 1932-02-09 George J Schladt Electrically controlled percussion firing mechanism
US1987912A (en) * 1933-02-27 1935-01-15 Rady Joseph Electromagnetic gun
US3063374A (en) * 1960-06-24 1962-11-13 Douglas J Robinson Electro-mechanical igniter
US3078803A (en) * 1961-03-17 1963-02-26 Harry J Margraf Electro-mechanical igniter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1844865A (en) * 1930-12-10 1932-02-09 George J Schladt Electrically controlled percussion firing mechanism
US1987912A (en) * 1933-02-27 1935-01-15 Rady Joseph Electromagnetic gun
US3063374A (en) * 1960-06-24 1962-11-13 Douglas J Robinson Electro-mechanical igniter
US3078803A (en) * 1961-03-17 1963-02-26 Harry J Margraf Electro-mechanical igniter

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4757629A (en) * 1984-12-06 1988-07-19 Austin Trevor A Gun firing mechanism
US20070084102A1 (en) * 2003-05-02 2007-04-19 O'dwyer James M Combined electrical mechanical firing systems
US7698849B2 (en) * 2003-05-02 2010-04-20 Metal Storm Limited Combined electrical mechanical firing systems
US20070215135A1 (en) * 2003-09-16 2007-09-20 Aj Acquisition I Llc Electronic paintball marker
US20080127957A1 (en) * 2003-09-16 2008-06-05 Campo John E Electronic Paintball Marker
US7624727B2 (en) * 2003-09-16 2009-12-01 Kee Action Sports I Llc Electronic paintball marker
US20100097166A1 (en) * 2008-10-16 2010-04-22 Claus-Peter Hasel Solenoid and actuating element with solenoid
US8138870B2 (en) * 2008-10-16 2012-03-20 Svm Schultz Verwaltungs-Gmbh & Co. Kg Solenoid and actuating element with solenoid
US8915004B1 (en) * 2011-10-24 2014-12-23 F. Richard Langner Systems and methods for a firing pin
US9200881B1 (en) 2011-10-24 2015-12-01 F. Richard Langner Systems and methods for an improved firing assembly
US20200025471A1 (en) * 2016-01-11 2020-01-23 Martin Grier Firearm system and method
US11047634B2 (en) * 2016-01-11 2021-06-29 Forward Defense Munitions, Co. Firearm system and method
CN111765805A (zh) * 2019-04-02 2020-10-13 南京理工大学 基于线圈驱动击发的电磁自动步枪
GB2595313A (en) * 2020-05-14 2021-11-24 Eaton Intelligent Power Ltd Disconnect device with magnetic switch

Also Published As

Publication number Publication date
DE2148110A1 (de) 1973-03-15
GB1373604A (en) 1974-11-13
JPS4838000A (enrdf_load_stackoverflow) 1973-06-04
CH535485A (de) 1973-03-31
NL7212299A (enrdf_load_stackoverflow) 1973-03-15
IT967334B (it) 1974-02-28
AT308885B (de) 1973-07-25
FR2152836A1 (enrdf_load_stackoverflow) 1973-04-27

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