US1770135A - Automatic firearm with sliding barrel and locked breech - Google Patents

Automatic firearm with sliding barrel and locked breech Download PDF

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Publication number
US1770135A
US1770135A US401867A US40186729A US1770135A US 1770135 A US1770135 A US 1770135A US 401867 A US401867 A US 401867A US 40186729 A US40186729 A US 40186729A US 1770135 A US1770135 A US 1770135A
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US
United States
Prior art keywords
breech
piece
barrel
head portion
spring
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
US401867A
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English (en)
Inventor
Herlach Fritz
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 US1770135A publication Critical patent/US1770135A/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
    • F41A3/00—Breech mechanisms, e.g. locks
    • F41A3/12—Bolt action, i.e. the main breech opening movement being parallel to the barrel axis
    • F41A3/14—Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively
    • F41A3/16—Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively the locking elements effecting a rotary movement about the barrel axis, e.g. rotating cylinder bolt locks
    • F41A3/26—Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively the locking elements effecting a rotary movement about the barrel axis, e.g. rotating cylinder bolt locks semi-automatically or automatically operated, e.g. having a slidable bolt-carrier and a rotatable bolt

Definitions

  • the breech piece In a particular type of breech piece with rotary ribs for automatic firearms with sliding barrel, the breech piece consists of a body portion guided rectilinearly in the casing of the weapon, and with a rotatable head por tion carrying the devices looking it with the barrel, the head portion being rotated by means of a torsion spring into the locking position.
  • the breech is unlocked during the recoil of the barrel by a cam on the head of the breech piece, which in co-operation with a circularly formed guiding groove on a fixed portion of the weapon, for example on the casing, rotates it into the unlocked position relatively to the body portion of the breech piece, at the same time stressing the torsion spring.
  • the head portion of the breech retains this position until the end of theforward movement of the breech piece, when the latter is again released by the torsion spring which is kept in the stressed position along the guiding groove and rotates the head portion and locks it with the barrel
  • This device has, however, the drawback that the guiding members of the two part breech piece, after the breech has been unlocked during the whole further forward and backward movement, are pressed by the stressed torsion spring against the guides on the casin of the weapon. Considerable additional rictional resistances are thus produced which retard the movement of the breech piece and thereby reduce the rapidity of firing.
  • the invention obviated this drawback by the provision of a locking device between the two parts of the breech piece, which, after the head portion of the breech has been unlocked spring has been stressed, is automatically inserted and prevents any relative rotation between the two parts'of the breech and the spring from exerting any outward force.
  • the invention enables a simpler construction of the guiding groove in the casing of the Weapon to be obtained.
  • the groove need not then have the circular form which is difiicult to manufacture. It is sufiicient to provide a simple recess in the casing with a single inclined surface for unlocking the head of the breech, so that the controlling switch necessary in the previously known guiding groove-is also no longer required.
  • Figure 1 is a longitudinal section through the still unlocked breech parts shortly before the end of its forward movement.
  • Figure 2 is a cross-section through the breech seen in the direction A-A of Figure 1.
  • Figure 3 is a'lcross-section seen in the direction B-B.
  • Figure 4 is a section on the line CC of. Figure 2.
  • the breech consists of a body portion 0 guided rectilinearly in the casing b of the weapon, and a head portion 0 carrying locking ribs 0 and rotatable relatively to the part 0
  • Both-parts 0 and 0 are secured by a bayonet joint 0 t t' -fr from the barrel therefore after the I agains separa ion om the barrel during the relative rotation, taking place in the normal manner in the course of the firing period, but which separation occurs later against the action or with the aid of a torsion spring 6 inserted between the two parts.
  • the breech at which the head 0 takes up the position shown dotted in Figure 2 and is locked with the barrel 0: is at first impelled rearwards with the barrel until the arm 0 encounters an inclined surface b of the recess of the :asing b.
  • the part 0 is thereby rotated relatively to the rectilinearly controlled part 0 whereby the breech c a is unlocked from the barrel a and the locking spring 6 is stressed.
  • an inclined surface 0 ( Figure 4 formed in the arm 0 encounters a locking olt 0-, projecting, under the action of a spring, from the part 0 and presses it back, until, when the breech has been completely unlocked, the bolts 0 c of the two parts 0 c of the breech come into register, and the bolt 0 enters the arm 0 thereby displacing the bolt 0 to some extent forward.
  • the whole force of the locking spring 6 is now confined to the locked parts 0 c of the breech.
  • Automatic firearm with a sliding barrel and two part breech piece comprising in combination a body portion of said breech piece guided rectilinearly in the casing of said weapon, a head portion of said breech piece, a torsion spring inserted intermediatel and controlling the rotation of the said head portion of said breech piece, locking means intermediate the two parts of the said breech piece,
  • said lockin means connecting the two parts of the breec piece against relative rotation, which locking means 1s again automatically ejected.
  • Automatic firearm with a sliding barrel and two part breech piece comprising in combination a body portion of said breech piece, means for rectilinearly guiding said reech piece" in the casing of said weapon, a head portion of said breech iece, a torsion spring inserted intermediate y and controlling the rotation of the said head portion of the said breech piece, lockin means intermediate the two parts of the said breech piece, which are automatically inserted on the recoil of the said breech piece after the said head portion has been rotated and unlocked from the barrel of the weapon against the resistance of the said spring, said lockin means connecting the two parts of the breec piece against relative rotation, means for automatically ejecting said locking means and means for returning the head portion of the breech piece into the osition in which it is again locked with the arrel.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Adornments (AREA)
  • Toys (AREA)
US401867A 1928-09-21 1929-10-23 Automatic firearm with sliding barrel and locked breech Expired - Lifetime US1770135A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE141354X 1928-09-21

Publications (1)

Publication Number Publication Date
US1770135A true US1770135A (en) 1930-07-08

Family

ID=5668623

Family Applications (1)

Application Number Title Priority Date Filing Date
US401867A Expired - Lifetime US1770135A (en) 1928-09-21 1929-10-23 Automatic firearm with sliding barrel and locked breech

Country Status (4)

Country Link
US (1) US1770135A (enrdf_load_html_response)
CH (1) CH141354A (enrdf_load_html_response)
GB (1) GB319586A (enrdf_load_html_response)
NL (1) NL32130C (enrdf_load_html_response)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0226660D0 (en) * 2002-11-15 2002-12-24 Bosher Gilbert F C Breech loaded gun

Also Published As

Publication number Publication date
CH141354A (de) 1930-07-31
GB319586A (en) 1930-11-13
NL32130C (enrdf_load_html_response)

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