US1784325A - Barrel of firearms - Google Patents

Barrel of firearms Download PDF

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Publication number
US1784325A
US1784325A US408059A US40805929A US1784325A US 1784325 A US1784325 A US 1784325A US 408059 A US408059 A US 408059A US 40805929 A US40805929 A US 40805929A US 1784325 A US1784325 A US 1784325A
Authority
US
United States
Prior art keywords
barrel
insertion piece
furrows
grooves
firearms
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
US408059A
Other languages
English (en)
Inventor
Witzell Karl
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.)
Rheinische Metallwaaren and Maschinenfabrik AG
Original Assignee
Rheinische Metallwaaren and Maschinenfabrik 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 Rheinische Metallwaaren and Maschinenfabrik AG filed Critical Rheinische Metallwaaren and Maschinenfabrik AG
Application granted granted Critical
Publication of US1784325A publication Critical patent/US1784325A/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
    • 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

Definitions

  • the new piece inserted into the barrel can easily be brought in the proper angular position and may then be fixed in this position, so that it is abs-olutely prevented from moving during firing and turning under the influence of the grooves or furrows.
  • the insertion piece must also be easily replaceable or exchangeable.
  • the insertion piece snugly fitting the correspondingly bored barrel, carries at its front face one or more projections which engage correspondingly shaped openings provided in the adjoining front face of the barrel.
  • the adjoining faces of the insertion piece and of the barrel are formed as helicoidal surfaces of equal pitch the direction of which is opposite to that of the grooves or furrows of the barrel.
  • Each of the helicoidal surfaces is provided with a stepped face or shoulder extending in the direction of the axis of the bore.
  • the helicoidal sur- 40 faces are easy to make and the stepped face or shoulder of the insertion piece may, without any difliculty, be arranged in such a position that, when it is brought into contact with the counter-face of the barrel, the
  • a spare tube'or insertion piece a which contains the loading chamber and a portion of the grooves or furrows.
  • the adjoining faces of the barrel 6 and of the insertion piece a are formed as single helicoidal surfaces 03 of equal flat pitch the direction of which is opposite to that of the grooves or furrows.
  • the shoulders or stepped faces 0 of the helicoidal surfaces are of the same direction as the axis of the bore and occupy such a position at both parts that, when the shoulders engage each other, the grooves or furrows of both parts exactly fit or merge into each other.
  • the forward movement of the projectile causes the helicoidal surface d of the insertion piece a to be firmly pressed against the helicoidal surface of the barrel.
  • the torque caused by the grooves or furrows and acting upon the insertion piece a is transferred to the barrel 2) by means of the stepped faces or shoulders 0 without any possibility of relative rotation or displacement of the two tube-like parts a and b. If it is desired to remove the insertion piece a, it is, for the purpose of loosening, first turned with regard to the barrel .7) in the direction of the grooves or furrows, whereupon the helicoidal surfaces 01 disengage the two parts, so that the insertion piece a may easily be pulled out to the rear of the barrel.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Harvester Elements (AREA)
US408059A 1928-06-01 1929-11-18 Barrel of firearms Expired - Lifetime US1784325A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1784325X 1928-06-01

Publications (1)

Publication Number Publication Date
US1784325A true US1784325A (en) 1930-12-09

Family

ID=7743157

Family Applications (1)

Application Number Title Priority Date Filing Date
US408059A Expired - Lifetime US1784325A (en) 1928-06-01 1929-11-18 Barrel of firearms

Country Status (2)

Country Link
US (1) US1784325A (xx)
NL (1) NL32133C (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2780019A (en) * 1952-02-19 1957-02-05 George C Sullivan Gun barrel of aluminum alloy with metallic coatings

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2780019A (en) * 1952-02-19 1957-02-05 George C Sullivan Gun barrel of aluminum alloy with metallic coatings

Also Published As

Publication number Publication date
NL32133C (xx)

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