US3359856A - Gun barrel with variable capacity chamber - Google Patents

Gun barrel with variable capacity chamber Download PDF

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Publication number
US3359856A
US3359856A US547863A US54786366A US3359856A US 3359856 A US3359856 A US 3359856A US 547863 A US547863 A US 547863A US 54786366 A US54786366 A US 54786366A US 3359856 A US3359856 A US 3359856A
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US
United States
Prior art keywords
bore tube
bore
chamber
barrel
barrel member
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
US547863A
Other languages
English (en)
Inventor
Grosschopf Herbert
Zehfeld Paul
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.)
Rheinmetall Industrie AG
Original Assignee
Rheinmetall GmbH
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 Rheinmetall GmbH filed Critical Rheinmetall GmbH
Application granted granted Critical
Publication of US3359856A publication Critical patent/US3359856A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/08—Brake cylinders other than ultimate actuators
    • 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
    • F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
    • F41A21/02—Composite barrels, i.e. barrels having multiple layers, e.g. of different materials
    • F41A21/04—Barrel liners
    • 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
    • F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
    • F41A21/12—Cartridge chambers; Chamber liners

Definitions

  • a gun barrel having an outer supporting barrel member and a bore tube within the barrel member longitudinally disp-laceable with relative movement between the barrel member and t-he bore tube. Means are provided mounted on the gun to adjust the barrel member and bore tube relative to each other, and the bore tube has a tapering bore portion at the inner end thereof.
  • the invention relates to gun barrels which consist of an outer barrel as supporting member and a bore tube exchangeably arranged in the outer barrel.
  • a gun has a much longer barrel than a howitzer giving a greater muzzle velocity and thus a very flat trajectory and a long range. Howitzers have shorter barrels, a medium muzzle velocity, a very sharp trajectory and a shorter range. Howitzers are, therefore, particularly suitable for attacking targets behind cover and at short range.
  • a barrel with a variable capacity chamber is created.
  • the cubic capacity can be adapted t the size of the propelling charge of the round to be red. This makes it possible to re according to a ring table at all ranges.
  • a barrel embodying the invention consists of an outer barrel member as supporting member and a bore tube so arranged in the outer barrel so that the bore tube is longitudinally displaceable with respect to the outer barrel member and capable of being xed in position, in such a way that the cubic capacity of the chamber can be altered by longitudinal displacement of the bore tube.
  • the rear end of the bore tube projecting into the chamber has a bore expanding from the internal diameter or calibre of the bore tube almost to the outside diameter of the tube and ⁇ forms a variable section of the chamber.
  • the axial displacement of the bore tube can be eifected in various ways.
  • the bore tube is pref- ICC ferably provided over part of its length with an external thread and is guided in a threaded nut rotatably supported in the outer barrel member.
  • the nut By rotation of the nut, which can be eiected, for example, by means of a crank by way of a worm gear, the bore tube is displaced longitudinally, in such manner that the chamber is altered in length and thus in cubic capacity.
  • the bore tube may be
  • the bore tube can be provided on its periphery with an annular piston, to either side of which pressure can be applied in a cylinder chamber provided in the outer barrel.
  • the cylinder chamber may take the form of a cylindrically-widened section yon the outer barrel.
  • FIG. 1 is a vertical longitudinal section through the gun:
  • FIG. 2 is a horizontal longitudinal section taken on line II-II of FIG. 1 in the direction of the arrows, and,
  • FIG. 3 is a top view partly in section looking in the direction of arrow III, FIG. 1, of part of the gun.
  • the barrel consists of an outer barrel member 1 as supporting member and a bore tube 2 arranged in the latter so that it is longitudinally displaceable with respect to the outer barrel.
  • the outer barrel member 1 is connected by means of the screw joint 3 to a breech section 4. Over the greater part of its length, the outer barrel member 1 has a cylindrical bore 5 in which the bore tube 2 is supported and guided. A further support is provided by a guide bearing 6 which is attached to the front end of the outer barrel member 1. In the region between the cylindrical bore 5 and the guide bearing 6, the outer barrel has two sections 7 and 8 of enlarged diameter and of which the widened section 8 serves to support a threaded nut 9.
  • Engaged with the threaded nut is a thread 10 -on the external surface of the boretube in the region of section 7.
  • the threaded nut has on its periphery a toothed section 13 in which is engaged a pinion 14 supported on the outside of the outer barrel.
  • the pinion is driven by a crank drive 15 via a universal joint 16.
  • the crank drive 15 is mounted upon the breech section 4.
  • the rear end of the bore tube projecting into the chamber 11 has a tapered bore portion 12 which expands from the internal diameter or calibre of the bore tube approximately to the outside diameter of the latter and defines the chamber at the front. In that way there is formed a chamber which is variable in length and thus in cubic capacity.
  • the barrel is shown with asmall chamber, as is suitable for the smaller propellent charge of a howitzer shell.
  • the bore tube is shown at the limit of its movement to the left as seen in FIG. 1.
  • the bore tube is displaced in a longitudinal direction to the right, whereby the chamber is enlarged until it has the cubic capacity required for the prescribed range and corresponding to a larger propelling charge of a gun shell.
  • the cubic capacity of the chamber set in each case can be indicated by means of markings provided either on the front section of the bore tube projecting out of the outer barrel or on the crank drive.
  • a gun barrel comprising in combination an outer supporting barrel member, a bore tube positioned in the barrel member and longitudinally displaceable relatively thereto in such manner as to vary the capacity of the chamber of the weapon, and means for adjustably holding the boretube in a required position in the barrel member, said bore tube having an end inside said barrel member and a tapering bore portion at said end, said taper bore increasing in size from the internal diameter of said bore tube to substantially the external diameter of the latter and forming a variable position part of said chamber.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Toys (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
US547863A 1965-05-15 1966-05-05 Gun barrel with variable capacity chamber Expired - Lifetime US3359856A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER40646A DE1243052B (de) 1965-05-15 1965-05-15 Geschuetzrohr

Publications (1)

Publication Number Publication Date
US3359856A true US3359856A (en) 1967-12-26

Family

ID=7406123

Family Applications (1)

Application Number Title Priority Date Filing Date
US547863A Expired - Lifetime US3359856A (en) 1965-05-15 1966-05-05 Gun barrel with variable capacity chamber

Country Status (6)

Country Link
US (1) US3359856A (hu)
BE (1) BE680904A (hu)
DE (1) DE1243052B (hu)
GB (1) GB1121890A (hu)
NL (1) NL6605871A (hu)
SE (1) SE307312B (hu)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3730050A (en) * 1970-06-05 1973-05-01 Hughes Tool Co Variable volume firing chamber
US4722261A (en) * 1986-09-22 1988-02-02 United Technologies Corporation Extendable ram cannon
US10890405B1 (en) * 2019-07-01 2021-01-12 Sang su Yoon Non-tilting outer barrel for toy gun
CN114963865A (zh) * 2022-04-14 2022-08-30 中国人民解放军陆军工程大学 一种增容式火炮初速连续化装置及控制方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19841671A1 (de) 1998-09-11 2000-03-16 Rheinmetall W & M Gmbh Geschützrohr

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US121455A (en) * 1871-12-05 Improvement in submarine ordnance
US834341A (en) * 1905-12-02 1906-10-30 Albert Napoleon Tucker Device for adapting service rifles to reduced ranges.
US1480957A (en) * 1923-06-29 1924-01-15 Schneider & Cie Device for permitting variation of the capacity of explosion chambers in guns
FR739776A (fr) * 1932-07-08 1933-01-17 Tube en bronze à rapporter à l'intérieur du canon des armes de chasse, de tir ou servant à la défense nationale

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE348052C (de) * 1922-01-30 Ehrhardt & Sehmer Akt Ges Pulverfluegelminenwerfer
FR575488A (fr) * 1923-02-13 1924-07-30 Schneider & Cie Matériel d'artillerie démontable pour accompagnement de troupes d'infanterie
FR585216A (fr) * 1923-11-02 1925-02-23 Ateliers Et Chantiers Loire Sa Dispositif pour la réalisation des variations de volume de la chambre à poudre dans les canons

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US121455A (en) * 1871-12-05 Improvement in submarine ordnance
US834341A (en) * 1905-12-02 1906-10-30 Albert Napoleon Tucker Device for adapting service rifles to reduced ranges.
US1480957A (en) * 1923-06-29 1924-01-15 Schneider & Cie Device for permitting variation of the capacity of explosion chambers in guns
FR739776A (fr) * 1932-07-08 1933-01-17 Tube en bronze à rapporter à l'intérieur du canon des armes de chasse, de tir ou servant à la défense nationale

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3730050A (en) * 1970-06-05 1973-05-01 Hughes Tool Co Variable volume firing chamber
US4722261A (en) * 1986-09-22 1988-02-02 United Technologies Corporation Extendable ram cannon
US10890405B1 (en) * 2019-07-01 2021-01-12 Sang su Yoon Non-tilting outer barrel for toy gun
CN114963865A (zh) * 2022-04-14 2022-08-30 中国人民解放军陆军工程大学 一种增容式火炮初速连续化装置及控制方法
CN114963865B (zh) * 2022-04-14 2024-05-14 中国人民解放军陆军工程大学 一种增容式火炮初速连续化装置及控制方法

Also Published As

Publication number Publication date
NL6605871A (hu) 1966-11-16
BE680904A (hu) 1966-10-17
SE307312B (hu) 1968-12-23
DE1243052B (de) 1967-06-22
GB1121890A (en) 1968-07-31

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