US3619929A - Magazine with anti-double-feed indentations in the side walls - Google Patents

Magazine with anti-double-feed indentations in the side walls Download PDF

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Publication number
US3619929A
US3619929A US806806A US3619929DA US3619929A US 3619929 A US3619929 A US 3619929A US 806806 A US806806 A US 806806A US 3619929D A US3619929D A US 3619929DA US 3619929 A US3619929 A US 3619929A
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US
United States
Prior art keywords
cartridge
magazine
cartridges
uppermost
feeding
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
US806806A
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English (en)
Inventor
Robert D Fremont
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.)
Colt Industries Inc
Original Assignee
Colts Inc
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25194884&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US3619929(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Colts Inc filed Critical Colts Inc
Application granted granted Critical
Publication of US3619929A publication Critical patent/US3619929A/en
Assigned to COLT INDUSTRIES, INC., A CORP. OF PA reassignment COLT INDUSTRIES, INC., A CORP. OF PA MERGER (SEE DOCUMENT FOR DETAILS). 10-28-86 Assignors: CENTRAL MOLONEY INC., A CORP. OF DE, COLT INDUSTRIES OPERATING CORP. A CORP. OF DE
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
    • F41A9/00—Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
    • F41A9/61—Magazines
    • F41A9/64—Magazines for unbelted ammunition
    • F41A9/65—Box magazines having a cartridge follower
    • F41A9/69—Box magazines having a cartridge follower characterised by multiple-row or zigzag arrangement of cartridges

Definitions

  • FIG. 1 A first figure.
  • a primary object of this invention is to provide an improved magazine ensuring smooth, rapid feeding of cartridges to a firearm and which virtually eliminates any possibility of so-called double feeding of the cartridges causing the firearm to malfunction or jam.
  • Another object of this invention is to provide such a magazine incorporating an anti-double-feeding feature in a magazine body which is both quick and easy to manufacture and assemble while also providing significantly improved and more dependable service.
  • FIG. 1 is a side View, partly broken away and partly in section, showing a magazine fitted into a receiver of a rifle;
  • FIG. 2 is a cross-sectional view of a magazine incorporating this invention.
  • FIG. 3 is an enlarged, partly broken away, section view of the magazine of FIG. 2, taken generally along line XX, with cartridge noses shown in full lines and cartridge casings shown in superimposed sections taken generally along lines XX, YY and Z-Z of FIG. 2.
  • a preferred embodiment of a magazine constructed in accordance with this invention is shown in operative position in a receiver 12 of a firearm such as a rifle.
  • a cartridge 14 is shown entering a firing chamber 16 of a rifle barrel extension 18 upon being removed from the magazine 10 by an advancing bolt 20.
  • a face of the bolt 20 engages an upper rim portion of the cartridge 14 to force it forwardly to ride up a ramp 22 at the entrance to the barrel extension 18 to guide the cartridge 14 into firing chamber 16.
  • the bolt 20 is held in battery position by cooperative locking action of barrel extension lugs 24 and bolt lugs 26 to lock the breech against the pressure of firing.
  • a suitable base plate closes the magazine 10 at its lower end and provides a seat for a follower spring 28 which continuously biases a follower 30 into engagement with the stacked cartridges 14.
  • the latter are shown arranged in a staggered double column with in the magazine 10, and each cartridge is shown having a conventional tapered configuration.
  • the illustrated magazine 10 has an elongated body of generally rectangular cross section including a front wall 32, a back wall 34 and a pair of side walls 36 and 38.
  • the side Walls 36 (and 38) are preferably fluted with grooves such as at 40 extending longitudinally of the body to provide linear guide surfaces 42, 44, 46 (and 42', 44', 46') for engaging the casings 48 of the cartridges 14 within the magazine 10.
  • each set of linear guide surfaces such as between 42 and l2 and between 44- and 44, e.g., is sufficient to conventionally permit a limited play among the cartridges as they are fed upwardly from the lower end of the magazine to ensure trouble-free feeding of the cartridges without binding against the magazine side walls.
  • a vexatious problem particularly of concern in the use of such conventional magazines in connection with semi-automatic and automatic magazine-fed rifles is that of double feeding of cartridges. This problem occurs when a cartridge 14]), following an uppermost cartridge 14a, is partially removed from the magazine 10 during the advance of the bolt 20. Upon bolt 20 being blocked, the rifle malfunctions or jams and must be cleared, which may result in an extremely dangerous delay if encountered under stress in a combat situation.
  • T 0 ensure a smooth and rapid cartridge feeding action with minimal fractional drag, wihle continuously providing positional control of at least the upper two cartridges 14a and 14b to eliminate any possibility of double feeding cartridges, the cartridge 14b following the uppermost cartridge 14a is intentionally misaligned in the opposite column within the magazine 10 in accordance with this invention and positioned in line contact engagement substantially along the entire length of the adjacent uppermost cartridge casing.
  • Such continuous positional control over the upper two cartridges 14la, 14b not only automatically positions the uppermost cartridge 14a in feeding position with its longitudinal axis substantially parallell to the bore of barrel extension 18, but also ensures that the following cartridge 14b is captured against movement past the front magazine wall 32.
  • the following cartridge 14b is longitudinally misaligned relative to the magazine 10 by the provision of an anti-double-feed indentation 50, 50' formed in each side wall 36, 38 to protrude inwardly toward the center of the magazine 10.
  • the anti-doublefeed indentations 5'0 and 50' are positioned in spaced opposed relation adjacent the front wall 32 and below its upper edge 52.
  • each uppermost cartridge 14a is successively removed from the magazine 10 by the bolt 20, the cartridges of each column on opposite sides of a longitudinal center plane AA of the magazine 10 ascend under the bias of the spring 28 to ride up ramp portions 54, 54' of the indentations 50, 50', which taper toward a lower end of the magazine 10, and are then nosed in upon reaching flat engagement surfaces 56, 56' formed in continuation with the ramp portions 54-, 54.
  • Each flat engagement surface 56, 56' is shown extending parallel to the longitudinal center plane AA of the magazine 10 and protruding inwardly a suflicient distance to engage'a casing neck portion 58 of each ascending cartridge 14 in the adjacent column causing it to nose in toward the longitudinal center plane AA of the magazine 10.
  • the nosed in cartridge is then pressed upwardly into uppermost position by the spring biased follower 30 upon removal of the preceding Cartridge in the opposite column.
  • Each fiat engagement surface 56, 56' additionally serves to direct the cartridges 14 in the opposite column into an uppermost feeding position in the magazine such as that illustrated as being occupied by cartridge 14a.
  • the cartridges 14 of each column thus respectively seat against bottom edge portions of arcuate lips 62 and 64 of the side walls 36 and 38 in parallel alignment with the bore of the barrel extension 18.
  • the only other contact between the uppermost cartridge 14a and the magazine 10 is provided by localized contact engagement of rear and middle portions of the cartridge casing 48 with upper terminal portions of the guide surfaces 42 and 44.
  • each groove 40 is preferably indented to a greater extent in the neck of the magazine 10 such as indicated by the inwardly and upwardly directed guide surfaces 65, 65' to maintain both the uppermost cartridge 1 4a and that cartridge 14c directly below it against any tendency to float or to be laterally displaced.
  • cartridge 14b With the uppermost cartridge 14a in feeding position, cartridge 14b is not only nosed in toward the center of the magazine 10, but is also tilted upwardly due to its substantially continuous line contact engagement with the tapered cartridge casings in the opposite column. That cartridge 14c directly below the uppermost cartridge 14a is similarly tilted upwardly under the bias of the follower spring 28 but is maintained in a plane parallel to the longitudinal center plane A-A by the guide surfaces 42, 44 which, as previously described, are indented a maximum distance in the neck of the magazine.
  • each cartridge 14a is automatically repositioned into a feeding position as it emerges at the top of the magazine 10 while the following cartridge 14b is positively captured below the front wall 32 in interfering confronting relation thereto to eliminate any possibility of overtravel during the advance of the bolt 20.
  • an elongated body for storing and feeding a staggered double column stack of cartridges having tapered casings and includes a pair of side walls and a front wall having an upper edge defining in part an opening in an upper end of the body for feeding an uppermost cartridge to a firearm
  • an improvement which comprises an anti-double-feed indentation protruding inwardly from each side wall adjacent the front wall and below its upper edge, the anti-double-feed indentations providing cartridge engaging surfaces in opposed alignment operative to engage a cartridge following an uppermost cartridge without engaging an uppermost cartridge and a cartridge immediately below it when such cartridges are positioned in a column adjacent each said cartridge engaging surface, the cartridge engaging surfaces each being spaced apart a distance sufficient to alternatively engage successive cartridges being fed to a cfirearm and misalign each said following cartridge in a position with its nose directed inwardly toward a longitudinal center plane of the body below the upper edge of the front wall and with its cartridge casing in line contact engagement substantially
  • anti-doublefeed indentations each include a ramp portion formed in continuation with its cartridge engaging surface and tapering toward a lower end of the body.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Vending Machines For Individual Products (AREA)
US806806A 1969-03-13 1969-03-13 Magazine with anti-double-feed indentations in the side walls Expired - Lifetime US3619929A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80680669A 1969-03-13 1969-03-13

Publications (1)

Publication Number Publication Date
US3619929A true US3619929A (en) 1971-11-16

Family

ID=25194884

Family Applications (1)

Application Number Title Priority Date Filing Date
US806806A Expired - Lifetime US3619929A (en) 1969-03-13 1969-03-13 Magazine with anti-double-feed indentations in the side walls

Country Status (4)

Country Link
US (1) US3619929A (de)
CH (1) CH500462A (de)
DE (1) DE2003610A1 (de)
GB (1) GB1279911A (de)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3726038A (en) * 1969-10-22 1973-04-10 D Bredbury Rectilinear magazine
US4139959A (en) * 1977-05-13 1979-02-20 Howard William J Cartridge magazine
US4472900A (en) * 1982-12-22 1984-09-25 Howard William J Telescoping magazine
US4831761A (en) * 1988-06-09 1989-05-23 Kulakow Eric M Gun magazine and spring assembly
US4888900A (en) * 1988-03-09 1989-12-26 Howard William J Magazine
US4888899A (en) * 1987-04-03 1989-12-26 Ram-Line, Inc. Magazine for housing cartridges using a spirally wound conforce spring
US5099595A (en) * 1990-06-05 1992-03-31 Ram-Line, Inc. Magazine for a firearm
US5153359A (en) * 1989-12-05 1992-10-06 Lishness Bryant L Catridge magazine for use with different type cartridges and method of dispensing cartridges
US5272828A (en) * 1992-08-03 1993-12-28 Colt's Manufacturing Company Inc. Combined cartridge magazine and power supply for a firearm
WO2009131709A1 (en) * 2008-04-24 2009-10-29 Barwick Billie John Jr Loading pellets in pellet guns
US20110173857A1 (en) * 2010-01-15 2011-07-21 Hogan Jr R Russell Increased capacity ammunition clip
EP2302316A3 (de) * 2009-09-25 2013-07-24 O.E. Technology LTD Magazin für eine Handfeuerwaffe
USD735831S1 (en) 2013-11-07 2015-08-04 Sagi Faifer Magazine for a firearm
US20150338180A1 (en) * 2013-01-11 2015-11-26 Howa Machinery, Ltd. Magazine lock and portable firearm
US9255749B2 (en) 2013-11-07 2016-02-09 Sagi Faifer Ammunition magazine and resilient member
USD765813S1 (en) 2014-12-31 2016-09-06 Magpul Industries Corporation Drum magazine for a firearm
US10317153B2 (en) 2016-07-11 2019-06-11 Sagi Faifer Apparatus and method for increasing capacity of an ammunition magazine
US10401105B2 (en) * 2017-01-13 2019-09-03 Sig Sauer, Inc. Multi-caliber magazine for a firearm and a method of forming the same
US11306985B2 (en) * 2017-02-14 2022-04-19 Taurus Holdings, Inc. Magazine of a pistol for cartridges with a case rim, and pistol having such a magazine
US11747102B2 (en) * 2019-10-29 2023-09-05 Shield Arms, LLC Increased capacity ammunition magazine
US11913748B2 (en) * 2022-03-21 2024-02-27 Sig Sauer, Inc. Magazine for rimmed ammunition
US12281868B2 (en) 2019-10-29 2025-04-22 Shield Arms, LLC Increased capacity ammunition magazine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT368807B (de) * 1981-04-30 1982-11-10 Glock Gaston Pistole

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3726038A (en) * 1969-10-22 1973-04-10 D Bredbury Rectilinear magazine
US4139959A (en) * 1977-05-13 1979-02-20 Howard William J Cartridge magazine
US4472900A (en) * 1982-12-22 1984-09-25 Howard William J Telescoping magazine
US4888899A (en) * 1987-04-03 1989-12-26 Ram-Line, Inc. Magazine for housing cartridges using a spirally wound conforce spring
US4888900A (en) * 1988-03-09 1989-12-26 Howard William J Magazine
US4831761A (en) * 1988-06-09 1989-05-23 Kulakow Eric M Gun magazine and spring assembly
US5153359A (en) * 1989-12-05 1992-10-06 Lishness Bryant L Catridge magazine for use with different type cartridges and method of dispensing cartridges
US5099595A (en) * 1990-06-05 1992-03-31 Ram-Line, Inc. Magazine for a firearm
US5272828A (en) * 1992-08-03 1993-12-28 Colt's Manufacturing Company Inc. Combined cartridge magazine and power supply for a firearm
WO2009131709A1 (en) * 2008-04-24 2009-10-29 Barwick Billie John Jr Loading pellets in pellet guns
US8291894B2 (en) 2008-04-24 2012-10-23 Barwick Jr Billie John Loading pellets in pellet guns
EP2302316A3 (de) * 2009-09-25 2013-07-24 O.E. Technology LTD Magazin für eine Handfeuerwaffe
US20110173857A1 (en) * 2010-01-15 2011-07-21 Hogan Jr R Russell Increased capacity ammunition clip
US8365454B2 (en) 2010-01-15 2013-02-05 Hogan Jr R Russell Increased capacity ammunition clip
US9513077B2 (en) * 2013-01-11 2016-12-06 Howa Machnery, Ltd. Magazine lock and portable firearm
US20150338180A1 (en) * 2013-01-11 2015-11-26 Howa Machinery, Ltd. Magazine lock and portable firearm
USD735831S1 (en) 2013-11-07 2015-08-04 Sagi Faifer Magazine for a firearm
US9255749B2 (en) 2013-11-07 2016-02-09 Sagi Faifer Ammunition magazine and resilient member
USD765813S1 (en) 2014-12-31 2016-09-06 Magpul Industries Corporation Drum magazine for a firearm
US10317153B2 (en) 2016-07-11 2019-06-11 Sagi Faifer Apparatus and method for increasing capacity of an ammunition magazine
US10401105B2 (en) * 2017-01-13 2019-09-03 Sig Sauer, Inc. Multi-caliber magazine for a firearm and a method of forming the same
US11306985B2 (en) * 2017-02-14 2022-04-19 Taurus Holdings, Inc. Magazine of a pistol for cartridges with a case rim, and pistol having such a magazine
US11747102B2 (en) * 2019-10-29 2023-09-05 Shield Arms, LLC Increased capacity ammunition magazine
US11927419B2 (en) 2019-10-29 2024-03-12 Shield Arms, LLC Increased capacity ammunition magazine
US11927418B2 (en) 2019-10-29 2024-03-12 Shield Arms, LLC Increased capacity ammunition magazine
US12228363B2 (en) 2019-10-29 2025-02-18 Shield Arms, LLC Increased capacity ammunition magazine
US12281868B2 (en) 2019-10-29 2025-04-22 Shield Arms, LLC Increased capacity ammunition magazine
US11913748B2 (en) * 2022-03-21 2024-02-27 Sig Sauer, Inc. Magazine for rimmed ammunition

Also Published As

Publication number Publication date
GB1279911A (en) 1972-06-28
CH500462A (de) 1970-12-15
DE2003610A1 (de) 1970-10-01

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Legal Events

Date Code Title Description
AS Assignment

Owner name: COLT INDUSTRIES, INC., A CORP. OF PA

Free format text: MERGER;ASSIGNORS:COLT INDUSTRIES OPERATING CORP. A CORP. OF DE;CENTRAL MOLONEY INC., A CORP. OF DE;REEL/FRAME:004740/0482

Effective date: 19870706