US2594770A - Feed and rammer arrangement at automatic firearms - Google Patents

Feed and rammer arrangement at automatic firearms Download PDF

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Publication number
US2594770A
US2594770A US626643A US62664345A US2594770A US 2594770 A US2594770 A US 2594770A US 626643 A US626643 A US 626643A US 62664345 A US62664345 A US 62664345A US 2594770 A US2594770 A US 2594770A
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US
United States
Prior art keywords
cartridge
feed
rammer
recoil
bridge
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
US626643A
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English (en)
Inventor
Hammar Victor
Dahlback Hedvig Irene
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.)
AKTIELBOLAGET BOFORS
Original Assignee
AKTIELBOLAGET BOFORS
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.)
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Publication date
Application filed by AKTIELBOLAGET BOFORS filed Critical AKTIELBOLAGET BOFORS
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Publication of US2594770A publication Critical patent/US2594770A/en
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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
    • F41A9/49—Internally-powered drives, i.e. operated by propellant charge energy, e.g. couplings, clutches, energy accumulators
    • 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
    • F41A9/01—Feeding of unbelted ammunition
    • F41A9/02—Feeding of unbelted ammunition using wheel conveyors, e.g. star-wheel-shaped conveyors
    • 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
    • F41A9/38—Loading arrangements, i.e. for bringing the ammunition into the firing position
    • F41A9/39—Ramming arrangements
    • F41A9/40—Ramming arrangements the breech-block itself being the rammer
    • F41A9/41—Ramming arrangements the breech-block itself being the rammer pushing unbelted ammunition from a box magazine on the gun frame into the cartridge chamber
    • 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
    • F41A9/54—Cartridge guides, stops or positioners, e.g. for cartridge extraction
    • 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

Definitions

  • the present invention relates to a feed and rammer arrangement for automatic rearms, in which the magazine is provided above the loading bridge and from which a cartridge fed downward thereto is delivered and set up in the breech by an automatically operating rammer, and the invention substantially characterized by two c successively operating feed-down mechanisms, Y .one ofwhich is actuated at the recoil of the tube and is; so ⁇ arranged that it feeds down onto the loading bridge the undermost cartridge in the magazine, while the other feed-down mechanism is actuated at the counter-recoil of the tube and is so arranged that it Ifeeds down one step, whereas the other cartridges remain in the magazine.
  • Figs. .la and 1b taken together, illustrate an automatic cannon in longitudinal section wherein the parts are shown in the position where the recoilablesystem is returning to its rear position.
  • Figs. 2a and 2btaken together show a similar section but viewed from the opposite side and .with the parts in the position where the rammer has been thrown forward and the cartridge is on its way to the breech. o o
  • Figs. 3a and 3b illustrate, also inA longitudinal section, the cannon in position of counter-recoil and viewed from the same side asin Figs. 2a. and 2b.
  • 3 Y Fig. ⁇ 4 is finally a section along the line Ivt-IV
  • the tube ⁇ I y is provided with a breech block 2 of knownA kind which is automatically opened after shooting, whereby the empty cartridge-case is ejected, and thereafter is automatically closed as soon as the next cartridge has been delivered.
  • the automatic loading arrangement consists partly of a rammer arrangement and partly of a; feed down ⁇ arrangexnent and is enclosed in the mechanism box 3 forming a continuation ofthe y vrecoil mantle 4.
  • the loading bridge is xed to the rear end of the tube and consequently takes part in the recoil movement of the tube.
  • Said bridge ⁇ 5 consists of a rear cartridge iiute 6 provided at the front with a flute 'I journaled for up and down rotation about a pin 8. Behind the rst cartridge flute 6 is another cartridge flute All xed to the mechanism box 3 which conse- V quently does not take part in the recoil movement.
  • the rotatable cartridge iiute 'I abucsat the front against the breech block and is consequently held in raised position when the breech is closed, i. e. when the breech block is in its upper position.
  • the cartridge flute l When the breech block is opened, the cartridge flute l, however, is held for a predetermined time (see Fig. l) in its raised position by means of a pawl 36 and serves therefore as a carrier for the empty cartridge-case.
  • this cartridge-case When ejected this cartridge-case is carried obliquely downwards below the cartridge flute 1 and is removed by the deflector I2 (see Fig. 2) lixed to the lower side of the mechanism box 3.
  • the cartridge flute 1 As soon as the cartridgecase has been removed, the cartridge flute 1 is ⁇ disengaged. and falls down into a position parallel to theaxis of the tube, thus forming a oontinuation of the cartridge flute 6.
  • the breech block When the next cartridge has been delivered to the breech,4the breech block is 4closed automatically in known manner whereby the flute 1 is once more raised V by the breech-block to its initial position (Fig.
  • Therammer mechanism that throws the cartridge fed down on the cartridge flutes 6 and 9 into the breech I3 is arranged at the rear of y the mechanism boxm and consists of the rammer I4, the guide bar l5, the rammer spring ⁇ l6and the pawl arm I1.
  • the rammer I4 consists of a carriage displaceably journalled in two guides I I fixedl to the inner walls of the mechanism box A member I8 .extending downwardly from l the rammer carriage encloses the guide bar I5.
  • the rammer springA ⁇ I6 ⁇ is arranged about the guide bar I5 and Vabuts at the front against the members I8 of therammer carriage andat the rear against the rear wall of the mechanism v box 3.
  • the rammer When the tube recoils the rammer is actuated by an extension of the loading bridge v5 and is displaced -backwards while simultaneously commovement.
  • the feed down mechanism operating during the counter-recoil movement is placed according to the embodiment illustrated in the attached drawings on the right side of the mechanism box 3 and consists of ve spring urged cartridge guides swingably'journaled in the feed down arm 2I.
  • This arm is vertically displaceable and its lower end is connected to a double arm lever 22 swingably journalled in the mechanism box about the shaft 23.
  • the fore end of the lever 22 is provided with a roller 24 running in a guide groove 25 at the right side of the loading bridge 5.
  • the guide groove 25 is so shaped that the lever 22 is given a swinging movement corresponding to the to and fro movement of the loading bridge during the recoil and counter# recoil, whereby the feed-down arm 2l connected to the lever 22 is given an upward and downward
  • the cartridge guides 20 are withdrawn during upward movement of arm 2l but are held extended during downward movement whereby they feed the cartridges in the magazine one step down.
  • the undermost cartridge isv delivered to the cartridge supports 25 and 21 (Fig. 4). This cartridge was resting before delivery against three rotatable star-shaped support wheels 28 arranged on a common, freely journalled shaft 29 and so arranged that, upon downward movement of the cartridge guides 20 said shaft 29 is displaced somewhat to the side and simultaneously rotated permitting the cartridge to fall down on the supports 2S, 21.
  • a spring loaded lever 26, 21 returns shaft 23 with the support wheels 28 to initial position.
  • the feed-down mechanism operating during the recoil movement is placed on the opposite side of the mechanism box and is substantially of the same construction as the right feed-down mechanism. It consists of a cartridge guide 30 (Fig. 4) connected to the feed-down arm 3l in turn connected to a double arm lever 33 journalled on a shaft in the mechanism box and provided at its fore end with a roller 34 running in a guide groove 35 on the left side of the loading bridge.
  • the feed-down arm 3i is displaced with the cartridgeguide downwards and then feeds down to the loading bridge the undermost cartridge positioned on the supports 26 and 21. This is made possible by the supports 26 and 21 being swingably suspended and subjected to the action of spring 26a so that they are forced to the side as the cartridge is fed downward.
  • cartridge holders 32 (Fig. 4). All the cartridge holders are adapted to swing aside so that the cartridges can pass down and are spring urged in spread out position.
  • a feed and rammer device comprising a loading bridge, a magazine located above the bridge, an automatically operating rammer adapted to propel into the breech of the firearm a cartridge resting on the bridge, and two successively operating feed-down mechanisms adapted to feed cartridges from the magazine to the bridge, one mechanism being actuated by recoil and the other by counter-recoil of the tube
  • the recoil actuated mechanism comprising means engaging the lowermost cartridge in the magazine and means for moving said first means toward the bridge as the tube recoils, whereby the lowermost cartridge in the magazine is fed to the bridge when the tube recoils
  • the counterrecoil actuated mechanism comprising means engaging al1 but the lowermost cartridge in the magazine, and means for moving the last-mentioned means toward the bridge as the tube is moved by counter-recoil, whereby all the other cartridges are fed down one step in the magazine.
  • a device as claimed in c aim 1 further comprising at least one spring biased cartridge support and wherein said counter-recoil actuated mechanism is adapted to feed the undermost cartridge in said magazine onto said support.
  • a device as claimed in claim 1 wherein said recoil actuated mechanism comprises a groove in said bridge, a double arm lever guided in said groove, a feed arm actuated by said lever for vertical reciprocating movement, and a cartridge guide connected to said feed arm.
  • said recoil actuated mechanism comprises a 'groove in said bridge, a double arm lever guided in said groove, a feed arm actuated by said, lever for vertical reciprocating movement, and a cartridge guide connected to said feed arm, said feedarm and cartridge guide being displaceable downwardly during recoil to deliver to said bridge the cartridge resting on said support.
  • a device as claimed in claim l wherein said rammer comprises a carriage journaled for displacement intwo fixed'guiding supports, a guide bar, on which said carriage is slidably mounted, and a compression spring surrounding said guide bar and abutting against a fixed member of said carriage at the forward end and against a fixed support at the rear end.
  • breech block mechanism adapted for automatic actuation and comprising a vertically reciprocable key, said second cartridge ute' n raised position abutting against said key wh n said mechanism is closed, and a pawl arranged to hold said flute in raised position for a short interval of time after said mechanism is opened.
  • a cartridge ute is stationarily arranged below said magazine, said bridge being arranged in froftfof said cartridge ute and consisting of a first :cartridge ute and a second cartridge ute journaled for rotation about a horizontal axis transversely of said bridge.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
US626643A 1942-02-07 1945-11-05 Feed and rammer arrangement at automatic firearms Expired - Lifetime US2594770A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE248237X 1942-02-07

Publications (1)

Publication Number Publication Date
US2594770A true US2594770A (en) 1952-04-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
US626643A Expired - Lifetime US2594770A (en) 1942-02-07 1945-11-05 Feed and rammer arrangement at automatic firearms

Country Status (4)

Country Link
US (1) US2594770A (de)
CH (1) CH248237A (de)
FR (1) FR914479A (de)
GB (1) GB608966A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2792762A (en) * 1954-01-20 1957-05-21 Franklin E Niess Feed and stop pawl depressor arrangement for a gun
US2868082A (en) * 1955-10-13 1959-01-13 Robert G Nutting Drop lock bolt for gun
US3500718A (en) * 1967-08-23 1970-03-17 Stoner Eugene Recoil operated automatic gun
WO2004025209A1 (en) * 2002-09-13 2004-03-25 Denel Ltd Ammunition feeding system
US20110174149A1 (en) * 2008-10-07 2011-07-21 Yurij Igorevich Donetsky Dynamic firearm

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2608135A (en) * 1946-11-13 1952-08-26 Bofors Ab Loading apparatus for automatic firearms
CH670697A5 (en) * 1985-09-03 1989-06-30 Oerlikon Buehrle Ag Automatic firearm with wedge breech - uses recoil to operate two separate cam systems controlling cartridge insertion and ejection
DE3618267C1 (de) * 1986-05-30 1987-07-30 Rheinmetall Gmbh Zufuehreinrichtung fuer huelsenlose Munition
DE69734366T2 (de) 1996-07-01 2006-07-13 The Procter & Gamble Company, Cincinnati Verfahren zur Herstellung getrockneter Kartoffelflocken
US7976889B2 (en) 2001-11-08 2011-07-12 The Procter & Gamble Company Doughs containing dehydrated potato products
US8336442B2 (en) 2008-11-21 2012-12-25 The United States Of America As Represented By The Secretary Of The Army Automatically-reloadable, remotely-operated weapon system having an externally-powered firearm

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US453702A (en) * 1891-06-09 maxim
US644969A (en) * 1899-08-21 1900-03-06 Vickers Sons & Maxim Ltd Automatic gun.
US702240A (en) * 1902-01-31 1902-06-10 W G Armstrong Whitworth & Company Ltd Automatic gun.
US1525065A (en) * 1923-12-15 1925-02-03 John M Browning Automatic firearm
GB398081A (en) * 1932-01-12 1933-09-07 Bofors Ab Improvements in and relating to automatic fire arms
US2192677A (en) * 1936-06-20 1940-03-05 Automatic Guns Inc Cartridge feed for guns

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US453702A (en) * 1891-06-09 maxim
US644969A (en) * 1899-08-21 1900-03-06 Vickers Sons & Maxim Ltd Automatic gun.
US702240A (en) * 1902-01-31 1902-06-10 W G Armstrong Whitworth & Company Ltd Automatic gun.
US1525065A (en) * 1923-12-15 1925-02-03 John M Browning Automatic firearm
GB398081A (en) * 1932-01-12 1933-09-07 Bofors Ab Improvements in and relating to automatic fire arms
US2192677A (en) * 1936-06-20 1940-03-05 Automatic Guns Inc Cartridge feed for guns

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2792762A (en) * 1954-01-20 1957-05-21 Franklin E Niess Feed and stop pawl depressor arrangement for a gun
US2868082A (en) * 1955-10-13 1959-01-13 Robert G Nutting Drop lock bolt for gun
US3500718A (en) * 1967-08-23 1970-03-17 Stoner Eugene Recoil operated automatic gun
WO2004025209A1 (en) * 2002-09-13 2004-03-25 Denel Ltd Ammunition feeding system
US20110174149A1 (en) * 2008-10-07 2011-07-21 Yurij Igorevich Donetsky Dynamic firearm
US8347777B2 (en) * 2008-10-07 2013-01-08 Yurij Igorevich Donetsky Dynamic firearm

Also Published As

Publication number Publication date
FR914479A (fr) 1946-10-09
CH248237A (de) 1947-04-30
GB608966A (en) 1948-09-23

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