US3363564A - Primer assembly - Google Patents

Primer assembly Download PDF

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Publication number
US3363564A
US3363564A US519557A US51955766A US3363564A US 3363564 A US3363564 A US 3363564A US 519557 A US519557 A US 519557A US 51955766 A US51955766 A US 51955766A US 3363564 A US3363564 A US 3363564A
Authority
US
United States
Prior art keywords
primer
cap
support
rim
annular
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
US519557A
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English (en)
Inventor
Gawlick Heinz
Stahlmann Rudolf
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.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
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 Dynamit Nobel AG filed Critical Dynamit Nobel AG
Application granted granted Critical
Publication of US3363564A publication Critical patent/US3363564A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F42C19/083—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition characterised by the shape and configuration of the base element embedded in the cartridge bottom, e.g. the housing for the squib or percussion cap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/26—Cartridge cases
    • F42B5/36—Cartridge cases modified for housing an integral firing-cap
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles

Definitions

  • the present disclosure relates to a fuse or primer assembly and more particularly, to a manner of securing a primer element on a primer support, especially in the bottom of cartridges for mortar and artillery ammunition.
  • a cup-shaped cap with an outer annular flange overlies the primer and an annular deformation of the support engages the flange outwardly of the primer rim, which is clamped between the bottom of the cup shaped portion of the cap and the support.
  • primer or fuse element a screw-threaded screw member with a pressed-inprimer composition which is threaded from the outside into a corresponding threaded bore of the cartridge bottom.
  • a threaded nipple with a pressed-in primer composition which is threaded from the inside into a dead-end bore provided with a thread of the cartridge bottom.
  • Both types of primer or fuse elements are relatively complicated and costly as regards the manufacture of the parts thereof. It is considerably more simple and less costly to manufacture another type of fuse or primer element, in which the primer composition is accommodated in a casing closed on one side by means of a bottom having a laterall projecting rim.
  • the present invention is concerned with primer or fuse elements of the last-mentioned type and aims, under elimination of the aforementioned disadvantages, at a simple solution for the securing thereof on the primer carrier or support, which not only assures a moisture-tight closure and sufiicient safety against falling out but also enables by means of simple mechanical measures to utilize one and the same primer element in the same, unchanged construction with different primer carriers or supports and to match the same also to differing sensitivity requirements.
  • a further object of the present invention resides in a primer assembly which is not only relatively inexpensive and simple but which also assures a completely satisfactory moisture tightness coupled with completely satis factory safety against any possible falling out of the primer or fuse element.
  • Still another object of the present invention resides in a primer assembly of the type described above which realizes the aforementioned aims and objects without exposing the primer element to the danger of unintentional ignition owing to its high sensitivity.
  • FIGURE 1 is a partial crosssectional view through one embodiment of a primer assembly in accordance with the present invention
  • FIGURES 2 and 3 show modified details of FIGURE 1 with like numerals for corresponding elements.
  • reference numeral 1 designates therein the primer support or carrier of any conventional construction which is provided with an aperture 2 and an adjoining ignition channel 3.
  • the primer element consisting of the case 4 and of the primer composition arranged therein (not shown in the drawing) is inserted into the aperture 2 of the primer support 1.
  • the primer element 4 abuts with the forward end surface 6 of the laterally projecting rim 5 thereof against the end surface 7 of the ring-shaped enlargement 8 of the aperture 2.
  • the cap 10 abuts flush against the bottom surface 9 of the case 4 and overlaps the rim 5 of the case 4 with lateral play.
  • the cap 10 is retained on the primer support 1 with its flange-like rim 11 by means of the inwardly flanged-over annular lip 12.
  • the conditions and relationships are chosen exactly in such a man ner that the outer surface 13 of the cap 10 terminates eX- actly flush with the surface 14 of the primer support 1.
  • This is achieved in that the height or depth of the enlargement 8 is selected equal to the height of the rim 5 plus the wall thickness of the cap 10. At most the height of the cap 10 can be made equal to the height of the recess 8 if a flush termination of the cap 10 with the primer support 1 is to be assured.
  • the height or depth of the recess 16 of the cap 10 can, of course, under no circumstances be larger than the height of the rim 5 whereby always the minimum height of the rim 5, determined within the range of the permissive manufacturing tolerances has to be used as basis for such consideration.
  • the cap 10 is arranged in the illustrated embodiment with some radial play in the enlargement 8; of course, the dimensions can also be so chosen fitting accurately. At least with the illustrated embodiment this is not necessary, as in this case the annular lip 12, whose initial configuration prior to its deformation is indicated only schematically and obviously only for exemplary purposes by the dash line, prevents with certainty a radial displacement of the cap 10. However, also in the case when the annular lip 12 should extend only over a smaller portion of the flange rim ll of the cap 10, any undesired lateral displacement of the cap 10 can be avoided if care is taken that the cap 10 is pressed sufficiently strongly against the bottom surface 9 of the case 4.
  • Other shapes and dimensions of the original cross section of the annular lip 12 are, of course, within the frame of the present invention and readily within the scope of a person skilled in the art. It is essentially above all that for the end shape of the annular lip 12 intended to be achieved in a given case a corresponding material cross section is available which can be readily calculated.
  • a recessed arrangement of the illustrated type is, of course, not necessary in every case though it appears appropriate and is also recommended if the securing of the primer element is realized approximately directly in the bottom of a cartridge.
  • the assembly relates to the securing of the fuse or primer element in a fuse or primer screw member which, in its turn, can be threaded to a greater or lesser extent intO the bottom of the cartridge by means of a thread, it is quite feasible and suflicient if the cap It the annular lip 12 and possibly also the rim project to a more or less large extent or also completely over the primer support 1 whose surface 14 may then extend corresponding to the dash and dot line indicated in the drawing.
  • the ignition sensitivity of the primer element is determined essentially by the thickness of the cap 10. Accordingly, one is in a position to vary the ignition sensitivity within wide limits and independently of the primer element by changing the thickness of the cap and possibly by a corresponding matching of the individual parts of th arrangement and to thus adapt the ignition sensitivity to the given application purpose.
  • the illustrated axial extent of the aperture 2 as well as the arrangement and construction of the ignition channel 3, which may additionally be filled with a booster charge, are to be construed only in an illustrative sense and can also be selected differently. It is only essential that the axial extent of the aperture 2 is so great that the forward end of the case 4 does not abut against the primer support 1 as otherwise a flush abutment of the forward end surface 6 of the rim 5 against the end surface 7 of the enlargement can no longer be assured safely.
  • a securing arrangement of a primer element on a primer support comprising: a primer having an axis, a forward axial end and a rearward axial end; said primer having a main forward body portion and a rearward annular rim extending transversely outwardly from said main body portion with respect to the axis to define a rim forwardly facing substantially annular support shoulder and a rearwardly facing surface; a relatively rigid primer support having a rearwardly open axially extending main aperture receiving therein said primer body; said primer support having a relatively rigid rearwardly facing substantially annular support surface substantially annularly engaging said rim forwardly facing substantially annular support shoulder; a cap having a central portion defining a forwardly facing surface engaging said primer rearwardly facing surface; said cap having a flange transversely extending outwardy from said central portion and outwardly with respect to said primer rim to define a rearwardly facing surface; said primer support having a portion out
  • said primer support has an annular enlargement aperture enlarged with respect to and rearwardly of said main aperture receiving therein said rimer rim and defining said primer support rearwardly facing substantially annular support surface;
  • said cap central portion is cup-shaped with a generally forwardly extending annular side wall axially overlapping said primer rim;
  • said cap flange is annular and extends outwardly from the forward end of said cap side wall;
  • said primer support portion is an annular lip rearwardly extending to outwardly axially overlap said cap flange and is annular inwardly deformed to rearwardly overlap said cap flange.
  • said primer main forward body is cylindrical; said rim forwardly facing substantially annular support shoulder extends in a plane substantially perpendicular to the axis; said primer rearwardly facing surface extends in a plane substantially perpendicular to the axis; said primer support rearwardly facing substantially annular support surface extends in a plane substantially perpendicular to the axis; said cap forwardly facing surface extends in a plane substantially perpendicular to the axis; said cap flange extends in a plane substantially perpendicular to the axis; said cap annular side wall extending generally axially.
  • said primer main forward body is cylindrical; said rim forwardly facing substantially annular support shoulder extends in a plane substantially perpendicular to the axis; said primer rearwardly facing surface extends in a plane substantially perpendicular to the axis; said primer support rearwardly facing substantially annular support surface extends in a plane substantially perpendicular to the axis; said cap forwardly facing surface extends in a plane substantially perpendicular to the axis; said cap flange extends in a plane substantially perpendicular to the axis; said cap annular side wall extending generally axially.
  • said primer main forward body is cylindrical; said rim forwardly facing substantially annular support shoulder extends in a plane substantially perpendicular to the axis; said primer rearwardly facing surface extends in a plane substantially perpendicular to the axis; said primer support rearwardly facing substantially annular support surface extends in a plane substantially perpendicular to the axis; said cap forwardly facing surface extends in a plane substantially perpendicular to the axis; said cap flange extends in a plane substantially perpendicular to the axis; said cap annular side wall extending generally axially.
  • cap flange has a forwardly facing annular surface tightly engaging said primer support rearwardly facing substantially annular support surface.
  • said primer support enlargement aperture has an axial depth substantially equal to the axial depth of said primer rim and said cap central portion.
  • cap cupshaped central portion has an inside axial dimension at most equal to the axial height of said primer rim.
  • cap central portion is substantially cup-shaped with an inside axial depth at most equal to the axial dimension of said primer rim.
US519557A 1965-01-15 1966-01-10 Primer assembly Expired - Lifetime US3363564A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED0046249 1965-01-15

Publications (1)

Publication Number Publication Date
US3363564A true US3363564A (en) 1968-01-16

Family

ID=7049593

Family Applications (1)

Application Number Title Priority Date Filing Date
US519557A Expired - Lifetime US3363564A (en) 1965-01-15 1966-01-10 Primer assembly

Country Status (7)

Country Link
US (1) US3363564A (ja)
BE (1) BE675108A (ja)
DE (1) DE1453820C3 (ja)
FR (1) FR1463298A (ja)
GB (1) GB1089652A (ja)
IL (1) IL24499A (ja)
NL (1) NL145950B (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3577923A (en) * 1969-01-16 1971-05-11 Us Army Percussion-electric primer and radiation shield
US5329855A (en) * 1993-07-20 1994-07-19 The Whitaker Corporation Cartridge for explosively operated industrial tools
US5388499A (en) * 1994-03-15 1995-02-14 The Whitaker Corporation Cartridge for explosively operated industrial tools
US9322625B1 (en) 2011-10-24 2016-04-26 F. Richard Langner Systems and methods for launching water from a disrupter cannon

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US855958A (en) * 1906-01-30 1907-06-04 Gottlob E Loeble Cartridge.
US932562A (en) * 1907-08-26 1909-08-31 Peters Cartridge Company Shell.
US2522208A (en) * 1946-06-26 1950-09-12 Remington Arms Co Inc Ammunition

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US855958A (en) * 1906-01-30 1907-06-04 Gottlob E Loeble Cartridge.
US932562A (en) * 1907-08-26 1909-08-31 Peters Cartridge Company Shell.
US2522208A (en) * 1946-06-26 1950-09-12 Remington Arms Co Inc Ammunition

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3577923A (en) * 1969-01-16 1971-05-11 Us Army Percussion-electric primer and radiation shield
US5329855A (en) * 1993-07-20 1994-07-19 The Whitaker Corporation Cartridge for explosively operated industrial tools
AU674952B2 (en) * 1993-07-20 1997-01-16 Whitaker Corporation, The Cartridge for explosively operated industrial tools
US5388499A (en) * 1994-03-15 1995-02-14 The Whitaker Corporation Cartridge for explosively operated industrial tools
US9322625B1 (en) 2011-10-24 2016-04-26 F. Richard Langner Systems and methods for launching water from a disrupter cannon

Also Published As

Publication number Publication date
DE1453820C3 (de) 1974-09-19
BE675108A (ja) 1966-05-03
NL6514250A (ja) 1966-07-18
DE1453820B2 (de) 1974-02-21
IL24499A (en) 1969-09-25
GB1089652A (en) 1967-11-01
NL145950B (nl) 1975-05-15
FR1463298A (fr) 1966-12-23
DE1453820A1 (de) 1969-02-20

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