US2115526A - Automatic firearm - Google Patents

Automatic firearm Download PDF

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Publication number
US2115526A
US2115526A US39387A US3938735A US2115526A US 2115526 A US2115526 A US 2115526A US 39387 A US39387 A US 39387A US 3938735 A US3938735 A US 3938735A US 2115526 A US2115526 A US 2115526A
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US
United States
Prior art keywords
breech
abutment
arm
breech mechanism
regulating device
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
US39387A
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English (en)
Inventor
Holek Vaclav
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.)
FIRM CESKOSLOVENSKA ZBROJOVKA
FIRM CESKOSLOVENSKA ZBROJOVKA AS
Original Assignee
FIRM CESKOSLOVENSKA ZBROJOVKA
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 FIRM CESKOSLOVENSKA ZBROJOVKA filed Critical FIRM CESKOSLOVENSKA ZBROJOVKA
Application granted granted Critical
Publication of US2115526A publication Critical patent/US2115526A/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
    • F41A19/00—Firing or trigger mechanisms; Cocking mechanisms
    • F41A19/03—Shot-velocity control

Definitions

  • This invention relates to automatic nre-arms, and has for its main object to provide a regulating device by which the rate oi' firing can be altered in a simple and reliable manner independently of the principle of action of the firearm.
  • a further object is to provide means of this nature which permit of setting the fire-arm for :L certain definite rate of firing without reguiating the pressure of the gases generated in firing. Still further objects of the invention will become apparent in the course of the ensuing description.
  • the rate of firing is l5 regulated by the arrangement that during a certain period of time some part of the breech mechanism, for example the breech-block or its carrier, is kept back in the open position, and is released again, after the lapse of the said predetermined length of time, for restoration into the firing position.
  • 'Ihe releasing mechanism in thiscase either makes use of the inertia of the moving masses of the device or is dependent on the action of resilient members, so that the rate of firing is determined by the duration of oscillation of a certain system of masses.
  • Another mode of regulating the rate of firing in automatic fire-arms consists in altering the inertia of the moving parts of the breech mechanism, and in the suitable selection of the resilient or spring elements employed for restoring the breech mechanism into the locked position.
  • One disadvantage of the devices working on this principle consists in the fact that the functioning of the regulating device, and therefore also the rate of firing, is aected by the angle of incidence of the longitudinal axis of the nre-arm to the horizontal, that is to say by the angle of elevation or depression of the fire-arm in use.
  • a further disadvantage of these known devices consists in their complicated design and their consequent liability to give trouble, more particularly in prolonged iiring, thus rendering the fire-arms to which they are tted, or in which they are used, less effective.
  • the abovementioned drawbacks are obviated by providing the fire-arm with an adjustable device for varying the length of the recoil of the breech mechanism and with it the rate of firing.
  • Fig. 1 shows the fire-arm with regulating device according to the present invention, diagrammatically, in part longitudinal section.
  • Fig. 2 is a longitudinal section taken through the breech casing and breech mechanism showa ing the regulating device in the operative position.
  • the fire-arm consists H5 of the barrel i firmly mounted within the casing 2, and of the breech mechanism y (Fig. l) comprising the breech 3 and its carrier
  • a piston 5 against the end surface of which, in the gas chamber 6, there act the gases which are generated by theexplosion of the charge and which expel the projectile from the barrel, these gases being admitted to the gas chamber 5 through the port l0.
  • a fetching up spring Il Figs. 2 and 3 which restores the carrier 4i together with the breech 3 into the forward position.
  • the device a which serves for regulating the rate of firing.
  • This device :t is adjustably disposed in the recoil path of the breech mechanism y, in the case of the constructional example shown in the drawing in the 35 recoil path of the breech carrier Il, in such a manner that the length of the recoil movement of the breech mechanism (breech carrier) can be varied (shortened or lengthened).
  • This device consists of two telescoped parts I2 and i3 which 4U are movable relatively to each other and forced apart by means of a spring I4.
  • the inner of these two parts, constituting the arm i2, is mounted on a pin I5 which is polygonal, for example rectangular, in cross-section, for the pur- 45 pose of more lrmly mounting the arm I2.
  • the pin I5 passes through the side Walls of the casing 2, and is provided at one end, outside the casing, with a thumb-latch i6 (Fig. 1) provided with suitable retaining means for securing it in a set 59 position.
  • the sleevelike member I3 (hereinafter called the abutment member) the internal recess of which, .together with the hollow Isocket portion of the arm I2, 55
  • abutment member I3 forms a space for the reception of the spring I4.
  • the extent o f the possible displacement of the abutment member I3 is limited by a longitudinal recess I1 (Fig. 2) in the side walls of this mem-
  • a projecting lug 20 with a sloping surface 2l.
  • 'Ihe position II of the regulating device x shown in Fig. 3, represents its neutral position.
  • the arm I2 together with the abutment member I3 is inclined upwards out of the recoil path of the breach mechanism y, so that neither the breech carrier 4 nor the breech 3 can come in contact with the regulating device :c during the recoil over the distance Z.
  • the distance through which the breech carrier recoils is reduced to 24-2.
  • the breech carrier 4 which is driven back after firing by the pressure of the gases upon the piston 5, compresses the restoring spring II, and, after recoiling through the distance z', strikes with its nose 22 against the forward end of the regulating device 3:. It is particularly advantageous to provide the forward end of the abutment member I3 with a projecting lug 20 having an oblique abutting surface 2
  • the kinetic energy of the recoiling masses is also stored up in the spring I4, so that the breech carrier4 4 reaches the rearward turning point of its course in a comparatively short time and is then forced forward by the force of the two compressed springs II and I4.
  • the recoil path Z of the breech mechanism y' is shortened to the distance 2*-1-2.
  • 'I'he4 time required for the forward movement of the breech carrier 4 into the locked position of closure is consequently also shortened, and at the same time the velocity of movement of the breech carrier increased, since the spring I4 acts additionally in forcing the breech carrier forward.
  • the regulating device a thus acts on the one hand as an abutment device, and on the other hand as an accelerator for accelerating the movement of the breech mechanism during its forward movement.
  • the regulating device consists essentially of an abutment element of a certain length. It Will be clear that there can equally well be associated with the pivoted arm of the regulating device an abutment member having a plurality of stepped abutment surfaces or a plurality of abutment elements of different or graduated length, for the purpose of obtaining a number of different rates of firing with one and the same regulating device.
  • the particular manner in which the regulating device is interposed in the recoil path of the breech mechanism is not necessarily limited to that shown in the drawing and described above.
  • the described pivotal movement of the regulating device could be replaced for example by sliding movement, or by a combination of sliding and n pivotal movement.
  • a firearm the combination with a. movable breech mechanism, of a movable abutment to receive the impact of the recoiling breech mechanism, said abutment being arranged to be moved selectively into and out of the recoil path of the breech mechanism, to shorten and lengthen said path, respectively.
  • a firearm the combination with a casing and a movable breech mechanism disposed therein, of an abutment to receive the impact of the recoilinglbreach mechanism, said abutment being movably mounted in said casing and adapted toV be moved into and out of the recoil path of the breech mechanism to selectively shorten and lengthen said path, whereby the rate of firing is increased and decreased, respectively.
  • said breech mechanism includes a breech carrier, and in which said abutment cooperates with said carrier to displace the rearward turning point of the recoil movement of the breech.
  • a casing a movable breech mechanism mounted therein, an arm adjustably mounted in said casing and carrying at least one abutment element to receive the impact of the recoiling breech mechanism, and spring means interposed between said arm and said element, the latter being adapted to be moved into and out of the recoil path of the breech mechanism to selectively shorten and lengthen said path.
  • a regulating device comprising a pivot pin extending through at least one Wall of said casing, an arm mounted on said pivot pin, a hand operating element attached to one end of said pivot pin, an abutment element to receive the impact of the recoiling breech mechanism, said abutment element being associated with said arm and adapted to be moved into and out of the recoil path of the breech mechanism to selectively shorten and lengthen the same, and means associated with said element and the breech mechanism for preventing unintentional displacement of the regulating device.
  • said means for preventing unintentional displacement consists of a plurality oi' elements provided With interengageable oblique surfaces, said elements forming part of the breech mechanism and the said abutment element respectively.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US39387A 1934-09-07 1935-09-06 Automatic firearm Expired - Lifetime US2115526A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS185454X 1934-09-07

Publications (1)

Publication Number Publication Date
US2115526A true US2115526A (en) 1938-04-26

Family

ID=5450145

Family Applications (1)

Application Number Title Priority Date Filing Date
US39387A Expired - Lifetime US2115526A (en) 1934-09-07 1935-09-06 Automatic firearm

Country Status (4)

Country Link
US (1) US2115526A (fr)
CH (1) CH185454A (fr)
FR (1) FR794544A (fr)
GB (1) GB449501A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465271A (en) * 1943-06-15 1949-03-22 Molins Machine Co Ltd Automatic breech block
US2982183A (en) * 1958-05-05 1961-05-02 Richard H Colby Firing rate conversion means for automatic firearms
US4889032A (en) * 1986-06-19 1989-12-26 Barbara Major Automatic firearm
US4972617A (en) * 1986-06-19 1990-11-27 Barbara Major Automatic firearm
US5038666A (en) * 1989-11-20 1991-08-13 Barbara Major Automatic firearm

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1157970B (de) * 1960-11-26 1963-11-21 Ignacio Del Riego Fernandez Automatische Feuerwaffe
RU2478177C2 (ru) * 2011-03-29 2013-03-27 Государственное унитарное предприятие "Конструкторское бюро приборостроения" Автоматическое стрелковое оружие
RU2549299C2 (ru) * 2013-09-17 2015-04-27 Открытое акционерное общество "Концерн "Калашников" Автоматическое стрелковое оружие

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465271A (en) * 1943-06-15 1949-03-22 Molins Machine Co Ltd Automatic breech block
US2982183A (en) * 1958-05-05 1961-05-02 Richard H Colby Firing rate conversion means for automatic firearms
US4889032A (en) * 1986-06-19 1989-12-26 Barbara Major Automatic firearm
US4972617A (en) * 1986-06-19 1990-11-27 Barbara Major Automatic firearm
US5038666A (en) * 1989-11-20 1991-08-13 Barbara Major Automatic firearm

Also Published As

Publication number Publication date
CH185454A (de) 1936-07-31
FR794544A (fr) 1936-02-19
GB449501A (en) 1936-06-29

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