US2188046A - Firing mechanism for automatic firearms - Google Patents

Firing mechanism for automatic firearms Download PDF

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Publication number
US2188046A
US2188046A US162735A US16273537A US2188046A US 2188046 A US2188046 A US 2188046A US 162735 A US162735 A US 162735A US 16273537 A US16273537 A US 16273537A US 2188046 A US2188046 A US 2188046A
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United States
Prior art keywords
trigger
trigger rod
interrupter
sear
arm
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Expired - Lifetime
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US162735A
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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.)
Ceskoslovenska Zbrojovka A S
Ceskoslovenska Zbrojovka As
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Ceskoslovenska Zbrojovka As
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Expired - Lifetime legal-status Critical Current

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    • 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
    • F41A19/06—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms
    • F41A19/25—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins
    • F41A19/27—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block
    • F41A19/29—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block propelled by a spring under tension
    • F41A19/30—Mechanical firing mechanisms, e.g. counterrecoil firing, recoil actuated firing mechanisms having only slidably-mounted striker elements, i.e. percussion or firing pins the percussion or firing pin being movable relative to the breech-block propelled by a spring under tension in bolt-action guns
    • F41A19/33—Arrangements for the selection of automatic or semi-automatic fire

Definitions

  • This invention relates to firing mechanism for automatic firearms which are adjustable for continuous firing and also for firing a single shot.
  • the chief object of the present invention is to provide an arrangement of the ring mechanism which will simplify the same not only with regard to its construction but also with regard to its manipulation.
  • an adjustable device which co-operates with the sear and is operated by the trigger and controlled by means thereof on adjustment for continuous firing or for firing a single shot.
  • Vthe trigger not only for the operation of the said adjustable device but also for adjusting the latter
  • the auxiliary devices which have hitherto been used and are separately operated and require an independent zo' member for this purpose, are dispensed with.
  • the firing mechanism is specially simplified by an arrangement in which the device that operates the sear is arranged on the trigger which carries out pushing and rotary movements, and, in which arrangement, the Sear-operating device is operated by means of the trigger during the pushing movement Whilst, during the rotary movement, it is controlled in such manner that it is adjusted either to a position for continuous ring or to a position for ring a single shot.
  • Figure 1 is a longitudinal sectional View of ring mechanism embodying the invention, the parts being shown in the safety position;
  • Figure 2 is a similar View to Figure l but showing the mechanism adjusted to a position for continuous firing
  • Figure 3 is a cross-section taken on the line III-III of Figure 2;
  • Figures 4 and 5 are views similar to Figures 2 and 3, but showing the mechanism adjusted to a position for firing a single shot;
  • Figures 6, 7 and 8 show the trigger button in sectional elevation looking in the direction of the 5o arrow p, Figure 1, the button occupying dilerent positions;
  • Figure 9 is a plan View of the button.
  • l denotes the trigger casing, the said casing having mounted therein,
  • a two-armed sear one arm 3 of which is provided with an aperture 4 and is loaded by a ⁇ spring 8, Whilst the other arm 5 of the sear extends into the path of the breech mechanism and, in the example shown, co-operates with a projection 6 on the breech block 1.
  • the trigger is constituted by a trigger rod I0 which is axially displaceable and rotatably mounted in bearings II and I2 in the casing I.
  • One end of the rod Ill is formed as a press-button I4 which is provided With a projection I5 and facilitates the operation of the trigger during the rotary movement thereof.
  • the press-button Ill is provided on the periphery thereof with an opening I6, Figure 9, which merges into two 1ongitudinal grooves I8 and I9 arranged on two sides of an end face I1 and disposed 90 apart.
  • a tooth or projection formed on the bearing II of the trigger button engages in the opening I6.
  • Rockably mounted on the trigger rod I0 is a device Y which co-operates, on the one hand, with the sear and, on the other hand, with the breech mechanism, the said device permitting the firing of a single shot to be effected.
  • This device which constitutes a so-called interrupter, consists of a yoke-like or other form of body which is mounted concentrically on the trigger rod I0 and is provided with a transverse Wall 26 having a bearing 21 for the trigger rod ID.
  • the bearing 21 is formed in such manner that it enables the interrupter to be rocked.
  • the body 25 is provided with arms 28 and 29.
  • the arm 28 passes through an aperture I3 in the bearing I2 and co-operates with the arm 3 of the sear, whilst the arm 29, which terminates in a rounded head 30, projects into the path of the breech mechanism and co-operates with a projection 3
  • the interrupter Upon adjustment into a position for continuous ring or for ring a single shot, the interrupter is controlled by means which are arranged on the trigger rod I0 and come into operationt during the rotary movement of the said rod.
  • the interrupter then acts as a lever of the rst order one arm of which is in two parts of which the part 28 co-operates with the sear and the part 29 co-operates with the breech mechanism, whilst.' the body 25, which co-operates with the controlling means arranged on the trigger rod, forms y the second arm of this lever.
  • the said controlling means consists of projections 36 and 31 which are formed on a disc on the trigger rod and are disposed at 90 to each other.
  • the projection 3B co-operates with a surface 33 on the body 25 and the projection 31 co-operates with a surface 34 also on the said body.
  • the pushing movement of the trigger rod is transmitted to the interrupter by means of a ring 39 on which the interrupter, which is loaded by the spring 46, bears by means of the wall 26.
  • a sleeve 4B or the like which is provided with a ring 4I having a projection 42 which, in the safety position of the firing mechanism, co-operates with a projection 43 on the sear.
  • the sleeve 4I) is provided with adjusting means for the ring mechanism and, for this purpose, has on its end face a radial tooth 44 which co-operates with radial grooves 45 formed on the adjacent end :face of the bearing I2.
  • a spring 46 which, with its other end, loads the interrupter and thus forms not only the returning spring of the interrupter and of the trigger rod during the pushing movement of the recoil, but also a 'resilient stay for the interrupter during its rocking movement and restores the interrupter to its original position after it has been rocked.
  • the breech mechanism is released and is moved in the direction of the arrow q, Figure l, under the action of the compressed projecting spring and a shot ⁇ is fired.
  • the arm 2B of 'the interrupter keeps the Sear in the rocked position as long as the finger of the operator presses on the trigger button.
  • 'Ihe arm 5 of the sear does not extend into the path of the breech block and therefore there is no interference with the movement of the said block.
  • the gun is set with the ring mechanism for automatic firing (series ring).
  • the gun When the trigger rod is located in the position shown in Figures 4, 5 and 8, the gun is adjusted for firing a single shot.
  • the firing mechanism is adjusted in this position by rotating the button I4 on the trigger rod III.
  • the groove I3 comes opposite the tooth 2l), so that the pressing of the trigger is rendered possible.
  • the projection 3l on the disc 35 presses on the lower surface 34 of the body 25, so that the interrupter is rocked in such manner that the head Sii on the arm 29 enters the path of movement of the projection 3i on the breech block '1.
  • the trigger rod I0 By pressing on the trigger, the trigger rod I0 is displaced and takes the interrupter with it, the arm 28 of which rocks the sear which in turn releases the breech block for forward move- 5 ment and iiring is effected.
  • thereof strikes the rounded head 35 of the interrupter and presses it downwards in opposition to the action of the spring 46 so that the arm 28 10 cornes opposite the aperture 4 in the arm 3 of the sear. Since the sear is pressed by the action of the spring 3, it is rocked back into the original position, the outer end of its arm 5 entering the path of movement of the breech block which it 15 holds securely after the recoil has taken place.
  • a trigger mechanism for automatic firearms vhaving a reciprocating breech block comprising 35 a slidable trigger rod, a sear cooperating with said trigger rod, an interrupter pivotally mounted on said trigger rod, an arm'on said interrupter cooperating with said sear, a second arm on said interrupter cooperating with said breech .40
  • a trigger mechanism for automatic firearms having a reciprocating breech block comprising a slidable trigger rod, a sear cooperating with said trigger rod, an interrupter pivotally mounted on, 50
  • said trigger rod two control surfaces on said interrupter displaced substantially 180 from each other, cooperating with said sear and said breech block, means for rotating said trigger rod to said predetermined positions and cooperating means ⁇ 5ron said trigger rod and said interrupter to cause a pivoting of said interrupter upon a rotation of said trigger rod in order to set said trigger mechanism for safety, continuous or single're.
  • a trigger mechanism for automatic iirearmsno having a reciprocating breech block comprising a slidable trigger rod, a sear cooperating with said trigger rod, a sleeve loosely mounted on said trigger rod so as to pivot thereon, two control surfaces on said sleeve displaced substantially 180165 from one another cooperating with said sear and said breech block, means for rotating said trigger rod and cooperating means on said trigger rod and said sleeve for pivoting said sleeve upon a rotation of said trigger rod in order to set said trigger mechanism in the safety position or for continuous or single re.
  • a ⁇ trigger mechanism for automatic firearms having a reciprocating breech block comprising a slidable trigger rod, a sear cooperating with said* trigger rod, an interrupter pivotally mounted on said trigger rod cooperating with said Sear and said breech block, means for rotating said trigger rod, a disc xed to said trigger rod having projections thereon relatively displaced about 90, a pair of surfaces on said interruptor relatively displaced about 180 cooperating with said projection to cause a pivoting of said interrupter upon a rotation of said trigger rod in order to set said trigger mechanism for continuous or single re.
  • a trigger mechanism for automatic Firearms having a reciprocating breech block comprising a slidable trigger rod, a sear cooperating With said trigger rod, a sleeve member loosely mounted on said trigger rod so as to pivot Within predetermined limits thereon, two arms mounted on said sleeve, one of said arms cooperating With said sear and the other arm cooperating with said breech block, a fixed ring on said trigger rod bearing against one face of said sleeve, resilient means bearing against the other face of said sleeve, means for rotating said trigger rod and cooperating means on said trigger rod and said sleeve to cause a pivoting of said sleeve and said arms upon a rotation of said trigger rod in order to set said trigger mechanism for continuous or single nre.
  • a trigger mechanism in accordance with claim 6 in which an abutment is provided for said resilient means so as to return said trigger rod to the initial position after a sliding movement thereof and said resilient means thereby forming a recoil spring for said trigger rod and a support for said sleeve.
  • a trigger mechanism for automatic firearms having a reciprocating breech block comprising a slidable trigger rod, a pivoted sear cooperating with said trigger rod having a recess therein, an interrupter pivotally mounted on said trigger rod, an arm on said interrupter cooperating with said Sear, a second arm on said interrupter cooperating With said breech block, means for rotating said trigger rod, cooperating means on said 'trigger rod and said interruptor to cause a pivoting of said interrupter upon a rotation of said trigger arm in order to set said trigger mechanism for continuous or single fire and When said trigger mechanism is set for single re said arm cooperating with said sear passes through said recess so as to interrupt the cooperation between said Sear and said arm while said interrupter is pivoted by said breech block acting upon said second arm.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Toys (AREA)
  • Blinds (AREA)
US162735A 1936-09-24 1937-09-07 Firing mechanism for automatic firearms Expired - Lifetime US2188046A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS197896X 1936-09-24

Publications (1)

Publication Number Publication Date
US2188046A true US2188046A (en) 1940-01-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
US162735A Expired - Lifetime US2188046A (en) 1936-09-24 1937-09-07 Firing mechanism for automatic firearms

Country Status (7)

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US (1) US2188046A (enrdf_load_html_response)
BE (1) BE423178A (enrdf_load_html_response)
CH (1) CH197896A (enrdf_load_html_response)
DE (1) DE706037C (enrdf_load_html_response)
FR (1) FR826371A (enrdf_load_html_response)
GB (1) GB485726A (enrdf_load_html_response)
NL (1) NL57379C (enrdf_load_html_response)

Also Published As

Publication number Publication date
DE706037C (de) 1941-05-16
NL57379C (enrdf_load_html_response)
CH197896A (de) 1938-05-31
FR826371A (fr) 1938-03-30
BE423178A (enrdf_load_html_response)
GB485726A (en) 1938-05-24

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