US3288029A - Closure device for a casing discharge port of a gun - Google Patents

Closure device for a casing discharge port of a gun Download PDF

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Publication number
US3288029A
US3288029A US444627A US44462765A US3288029A US 3288029 A US3288029 A US 3288029A US 444627 A US444627 A US 444627A US 44462765 A US44462765 A US 44462765A US 3288029 A US3288029 A US 3288029A
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US
United States
Prior art keywords
coupling
casing
door
gun
pawl
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
US444627A
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English (en)
Inventor
Birath Ake Johan Arthur
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.)
Saab Bofors AB
Original Assignee
Bofors AB
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Filing date
Publication date
Application filed by Bofors AB filed Critical Bofors AB
Application granted granted Critical
Publication of US3288029A publication Critical patent/US3288029A/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
    • 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

Definitions

  • the present invention relates to a device for opening and closing a closure member such as a door for a port in a protective wall encasing the loading and cartridge casing ejection mechanism of a gun, in particular an automatic recoiling gun.
  • a prolonged opening of the port entails the danger of damage to the gun by pieces of material propelled through the port and against the gun parts to be protected by the protective wall.
  • the device comprises, in combination, a closure member such as a door for opening and closing the port, an energy storing means linked to the door to apply a force thereto actuating the door to move it from an open position to a closed position, the energy storing means being arranged to store, during a motion of the door from the closed to the open position, the energy necessary for closing the door; a member for moving the door from the closed to the open position, said member including a first pawl coupling means arranged for releasable cooperation with a gun component which is movable during the operational cycle of the gun between the firing of two successive rounds shortly prior to the rearwardly ejection of an empty cartridge casing, preferably a gun component which is movable together with the gun barrel during the run-out and run-in movement thereof due to the recoil.
  • a closure member such as a door for opening and closing the port
  • an energy storing means linked to the door to apply a force thereto actuating the door to move it from an open position to a closed
  • This gun component has a movable actuating member arranged to cooperate with said first pawl coupling means in the position thereof in which the door occupies its closed position so as to engage the member for moving the door into the open position and to be released from cooperation with said pawl coupling means after the door has been brought into open position.
  • a second pawl coupling means is arranged to retain the door in the open position against the action of the force executed on the door by said energy storing means and comprises a first coupling member connected to the door and a second coupling member connected to a coupling releasing means, said coupling releasing means being pivotal into and out of the path of a casing ejected from the barrel towards and through the port to release said second pawl coupling when actuated by an empty casing during the ejection thereof.
  • the discharge port will be opened by action of a movable gun component actuating the door shortly before the ejection of a casing during a firing cycle.
  • the door will then be retained in open position by action of the second pawl coupling means, the first pawl coupling means after the opening of the door having released the member for opening the door from its cooperation with the actuating member of the reciprocating gun component.
  • the door will be retained in open position during the following ejection of the casing; the casing, when moving rearwardly from the cartridge chamber, actuating the coupling releasing means of the second pawl coupling means to release the door and to free it for return to closed position by action of the force of the energy storing means.
  • the releasing means of the second pawl coupling is preferably arranged with in the space closed by the door and, if this is the case, the empty casing may strike against the releasing means before having passed through the port and past the door.
  • the second pawl coupling is arranged, in a preferred embodiment according to the invention, in the manner of a mechanical escapement.
  • the component of the pawl coupling connected to the door and also as the component thereof connected to the coupling releasing means comprises each two stop noses, arranged for pairwise coopera-tion.
  • the components of the coupling comprise two first stop noses, one on each of the two components, arranged for mutual cooperation to hold the door in the open position after the motion thereof into this position by the action of the actuating member of the reciprocating or recoiling gun component as long as the releasing means is still protruding into the path of an ejected casing, and the two second stop noses, one on each of the two components, arranged relative to each other so as to engage each other after the disengagement of the first two noses when the releasing means, by the action of a casing, is swung out of the path of the casing.
  • the two components of the coupling are thus entirely disengaged from each other when the releasing means returns to its previous position clear of the path of an ejected casing.
  • the releasing means is actuated by a directional force tending to hold it in this position.
  • FIG. 1 is a perspective view showing a device according to the invention in a preferred embodiment thereof;
  • FIGS. 2-6 diagrammatically illustrate components for opening the door in dependence of actuating means reciprocating together with the gun barrel, and the energy storing means for closing the door after ejection of a casing and charged during the opening of the door;
  • FIGS. 79 illustrate the releasing means for the door to move into closed position after the ejection of a casing.
  • FIG. 1 illustrates components of the device according to the invention arranged in part on a support 1, a gun barrel 2, a breech ring 3 and a cartridge ramming guide 4 for cartridges to be fired.
  • the gun barrel 2 during firing, perfonns a recoil movement in its longitudinal direction in relation to the support.
  • the gun components illustrated in FIG. 1 are enclosed by armor plate 5 comprising a rear wall 6 having an outlet port 7 for empty casings ejected rearwardly from the cartridge chamber of the gun barrel along a casing guide 8.
  • a door 10 is hinged to the rear wall 6 by a hinge 9, the
  • an energy storing means which, in its simplest form, may comprise a spring mechanism, against the action of which the door may be opened.
  • a spring 12 FIG. 6, arranged in a spring housing 11, abuts at one end against a wall of the housing secured to the support 1, and at the other end against a collar 13 of a displaceable rod 14.
  • This rod 14 is connected by links 15, 16 and 17, and pivotal levers 18 and 19 to a bracket 20 on the door.
  • the door is pivotal from the closed to the open position and vice versa by a movement of rod 14 in the respective direction, spring 12 biasing the door into its closed position.
  • the means for opening the door are so arranged that the door is opened during a forward motion of the gun barrel and the components connected thereto, and these means are common to the means for closing the door, except for the means directly affecting storing of energy for closing the door, namely spring housing 11, spring 12 and collar 13.
  • the forward free end of the extension mounts a coupling means including a pivotal pawl 27 which cooperates with an actuating member 23 attached to a component, which participates in the recoil movement of the gun barrel.
  • this actuating member 23 is secured to a rod 24 which is lengthwise displaceable in a bracket 25 against the action of a shock absorbing spring 26.
  • the actuating member 23, is arranged relative to the pawl 27 so as to engage this pawl when moving backwardly to a rear position, and is then taking the rod 14 with it forwardly, while at the same time loading the spring 12, whereby the door is opened during a following run-in of the barrel.
  • the pawl 27 is actuated by a spring 22 to a position to engage with the actuating member 23 (FIG. 4).
  • a coupling releasing means as illustrated, comprise an edge defining a cut-out 28 in a bracket 29 secured to the support 1. This edge is located in the way of the pawl 27 so as to move the same out of engagement with the actuating member 23 against the action of spring 22 when the actuating member, after having returned from the rearward or recoil position, has reached a certain front position and the door is consequently opened.
  • the second coupling comprises a pawl 31 carried by a pivot 30 secured to arm 19.
  • Pawl 31 has two noses, 32 and 33, one of which cooperates with a nose 34 and the other with a nose 35 of a coupling member 36 which is pivotal about a pivot 37 mounted on a coupling releasing means 38 arranged to be swung into and out of the way of a cartridge casing along the casing guide 8.
  • This coupling releasing means 38 is normally held in a position extending into the guide by action of a spring 40 arranged between an abutment member 39 and the coupling releasing means 38 so as to protrude into the path of a cartridge casing 41 being ejected from the cartridge chamber of the barrel 3 towards the port 7, as illustrated in FIGS. 7 and 9, but when it is passed by an ejected casing, FIG. 8.
  • the coupling releasing means 38 When having been passed by the casing, the coupling releasing means 38 returns into the space within the cartridge casing guide 3, by action of spring 41 whereby the nose 35 releases nose 33, the second coupling means 31 to 36 of the device thus being released to free the door for being moved back into closed position by action of spring 12, as illustrated in FIG. 8. Thus, the starting position of the device as illustrated in FIG. 1 is restored.
  • a closure device for opening and closing a discharge port for empty shell casings ejected by the ejecting mechanism of a gun, said device comprising, in combination, a movable closure member for opening and closing a casing discharge port in a protective wall for a gun; energy storing means coupled to the closure member, said means being loaded by an opening of said closure member and urging the same into its closed position; a linkage means coupled with the closure member for moving the same from the closed position into the open position; a casingejecting mechanism including an actuating member movable in response to an activation of said ejection mechanism by firing a round from the gun; first coupling means supported by said linkage means and coupling the same to said actuating member in the closed position of the closure member for moving said member into its open position by a movement of said actuating member; first coupling-release means coacting said coupling means for releasing the same from the actuating member upon movement of the closure member into the open position; second coupling means coacting with said closure member
  • said ejection mechanism comprises a guide means for guiding an ejected casing toward said port
  • said second coupling-release means comprises a pivotally mounted actuating arm biased to protrude into the path of a casing passing through said guide means, engagement of said arm with a passing ejected casing causing a pivotal movement of the arm, said pivotal movement activating said coupling-release means for release of the second coupling means.
  • said second coupling means comprise an escape mechanism, said mechanism including a member linked to said linkage means and a means linked to said second coupling-release means, each of said two members having a first and a second catch nose, said first noses of the two members engaging each other to hold the closure member in its open position when and while said second couplingrelease means are inactive and being released when said second coupling-release means are activated by said engagement with an ejected casing, and said second noses of the two members engaging each other when the second coupling-release means are activated and being released when the second coupling-release means return into the inactive position upon passage of the casing.
  • said second coupling-release means comprise a pivotally mounted actuating arm biased to protrude into the path of an ejected casing, engagement with a passing ejected casing pivoting said arm out of the path of the casing, said protruding arm position constituting the inactive positive of the second coupling-release means, and said pivoted arm position constituting the activated position of the second couplingrelease means.
  • a device according to claim 3 and comprising spring 15 S. C. BENTLEY, Assistant Examiner.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Sheet Holders (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
US444627A 1964-04-08 1965-04-01 Closure device for a casing discharge port of a gun Expired - Lifetime US3288029A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE435964 1964-04-08

Publications (1)

Publication Number Publication Date
US3288029A true US3288029A (en) 1966-11-29

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ID=20264016

Family Applications (1)

Application Number Title Priority Date Filing Date
US444627A Expired - Lifetime US3288029A (en) 1964-04-08 1965-04-01 Closure device for a casing discharge port of a gun

Country Status (8)

Country Link
US (1) US3288029A (de)
AT (1) AT260731B (de)
BE (1) BE662188A (de)
CH (1) CH446121A (de)
DE (1) DE1281315B (de)
ES (1) ES311600A1 (de)
GB (1) GB1099951A (de)
NL (1) NL6504476A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3640177A (en) * 1969-06-18 1972-02-08 Oerlikon Buehrle Ag Firing button for releasing a trigger and opening a cartridge ejection gate
US4398447A (en) * 1981-02-19 1983-08-16 Fmc Corporation Vertical loading system for a gun mount
US4700609A (en) * 1985-10-04 1987-10-20 Fmc Corporation Autoloader for military vehicle
US4823676A (en) * 1985-10-04 1989-04-25 Fmc Corporation Autoloader for military vehicle
US4860633A (en) * 1985-10-04 1989-08-29 Fmc Corporation Autoloader for military vehicle
US9360264B2 (en) * 2014-05-01 2016-06-07 Joseph Rosenthal Universal firearm mounted receiving apparatus for casings
RU2851863C1 (ru) * 2025-06-24 2025-12-01 Акционерное общество "Конструкторское бюро приборостроения им. академика А.Г. Шипунова" Орудийная установка

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2190819C1 (ru) * 2001-11-22 2002-10-10 Открытое акционерное общество специального машиностроения и металлургии "Мотовилихинские заводы" Затвор артиллерийского орудия

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2781696A (en) * 1949-01-13 1957-02-19 James G Shonts Automatic ammunition loading device
GB703320A (en) * 1950-10-05 1954-02-03 Desmond Walter Molins Improvements in or relating to ordnance

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3640177A (en) * 1969-06-18 1972-02-08 Oerlikon Buehrle Ag Firing button for releasing a trigger and opening a cartridge ejection gate
US4398447A (en) * 1981-02-19 1983-08-16 Fmc Corporation Vertical loading system for a gun mount
US4700609A (en) * 1985-10-04 1987-10-20 Fmc Corporation Autoloader for military vehicle
US4823676A (en) * 1985-10-04 1989-04-25 Fmc Corporation Autoloader for military vehicle
US4860633A (en) * 1985-10-04 1989-08-29 Fmc Corporation Autoloader for military vehicle
US9360264B2 (en) * 2014-05-01 2016-06-07 Joseph Rosenthal Universal firearm mounted receiving apparatus for casings
US9945626B2 (en) 2014-05-01 2018-04-17 Joseph Rosenthal Universal firearm mounted receiving apparatus for casings
RU2851863C1 (ru) * 2025-06-24 2025-12-01 Акционерное общество "Конструкторское бюро приборостроения им. академика А.Г. Шипунова" Орудийная установка

Also Published As

Publication number Publication date
GB1099951A (en) 1968-01-17
CH446121A (de) 1967-10-31
DE1281315B (de) 1968-10-24
ES311600A1 (es) 1965-07-01
BE662188A (de) 1965-08-02
NL6504476A (de) 1965-10-11
AT260731B (de) 1968-03-25

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