US2113209A - Gun breech - Google Patents

Gun breech Download PDF

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Publication number
US2113209A
US2113209A US9946A US994635A US2113209A US 2113209 A US2113209 A US 2113209A US 9946 A US9946 A US 9946A US 994635 A US994635 A US 994635A US 2113209 A US2113209 A US 2113209A
Authority
US
United States
Prior art keywords
breech
nut
spindle
gun
plate
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
US9946A
Other languages
English (en)
Inventor
Hasek Jaroslav
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 Ltd Co FORMERLY
FIRM Ltd Co FORMERLY SKODA WORKS
Original Assignee
FIRM Ltd Co FORMERLY
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 Ltd Co FORMERLY filed Critical FIRM Ltd Co FORMERLY
Application granted granted Critical
Publication of US2113209A publication Critical patent/US2113209A/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
    • F41A3/02—Block action, i.e. the main breech opening movement being transverse to the barrel axis
    • F41A3/04—Block action, i.e. the main breech opening movement being transverse to the barrel axis with pivoting breech-block
    • F41A3/08—Block action, i.e. the main breech opening movement being transverse to the barrel axis with pivoting breech-block carrying a rotably mounted obturating plug of the screw-thread or the interrupted-thread type
    • 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
    • F41A3/02—Block action, i.e. the main breech opening movement being transverse to the barrel axis
    • F41A3/10—Block action, i.e. the main breech opening movement being transverse to the barrel axis with sliding breech-block, e.g. vertically

Definitions

  • This invention relates to a gun-breech in which a system of screw threaded parts is employed, that is to say a nut and a spindle which, when the breech is closed, occupies a position in which its geometrical axis coincides with the geometrical axis of the bore of the gun barrel. This position will hereinafter be referred to as the axial position.
  • the threaded spindle is screwed out of the nut until an axial pressure is developed which is suiiicient to effect the tight closure of the gun.
  • the spindle is first screwed into the nut, and then this system of screw threaded parts is shifted into a position which completely discloses the breech aperture, that is to say in which the breech is fully opened for re-loading.
  • the intrusion of the spindle into the nut on opening, and the withdrawal of the spindle from the nut on closing the breech is effected by a rotary movement of one of the two elements of the screw threaded system of parts when in the axial position.
  • the nut rotates while the spindle is locked against rotation and merely moves axially, or the spindle rotates in a fixed nut in which case the spindle is axially displaced simultaneously with its rotation.
  • the shifting of the screw breech could be effected either by rectilinear displacement or by rectilinear rolling movement.
  • the shifting of the breech system from the loading position to the axial position is effected on an arcuate path with the aid of members which are positively controlled by guiding means.
  • Fig. 1 is a longitudinal section of one form of construction of the breech according to the invention.
  • Fig. 2 is a section taken on the line II-II of Fig. 1.
  • Fig. 3 shows the breech screw alone, in elevation, as seen from the forward end, that is to say from the top in Fig. 1.
  • Fig. 4 shows, in longitudinal section, a modified form of construction of the invention which is of very special significance.
  • Fig. 5 is a substantially longitudinal sectional View of the coupling elements of a closure device according to Fig. 1, the view being illustrated on an enlarged scale, and
  • Fig. 6 is a substantially longitudinal sectional view of the coupling elements of a closure device according to Fig. 4, the view being illustrated on an enlarged scale.
  • the breech nut I0 together with the screw spindle II, is held in a spring 6 holder or rim I2 which is carried by the lower part (as viewed in Figure 1) of a hub I2 of square cross-section fitting over the squared upper portion I3 of a rocking shaft I5.
  • a band I4 10 Extending from the upper part of the hub I2 is a band I4 10 of polygonal shape which engages over the inner end of the spindle II, said inner end being similarly shaped. This looks the spindle II against rotation and, as a result, when the breech nut I0 is rotated, the spindle II moves only axially.
  • the holder I2 is resilient, preferably in the form of opposed spring arms, as shown most clearly in Figure 2, whereby there is always an adequate frictional resistance between'these 20 arms and the nut I I].
  • the shaft I5 is rotatably mounted in thebody I6 of the gun barrel, and carries at its outer end a lever Il terminating in a projecting pin I8, which may be in the form of a roller, or the like.
  • a cam plate I9 which is provided with a crank-handle 20. This plate I9 merges in the middle with a hollow screw spindle which is screwed into a threaded socket 2
  • the cam plate I9 When the crank-handle 20 is operated in the one direction of rotation, the cam plate I9 is retracted bodily, and conversely, is intruded when the bandle is turned in the opposite direction.
  • a groove 22 (see Fig. 3) engaged by the end I8 of the above-mentioned lever I1.
  • This groove is provided with a cam portion, whereby at a certain point in the rotation of the plate I9, the rocking member I3 is pivotally moved through an angle a which is required to swing the breech assembly from the axial position into the open position for loading.
  • the breech assembly is yieldably supported in the direction of closure by a spring 23 (see Fig. 2) secured to the body of the gun barrel.
  • This spring is preferably so dimensioned that it is capable of counterbalancing the weight of the breech assembly when the breech action involves vertical movement of this assembly.
  • the course and velocity of the breech-opening motion can be varied within wide limits by varying the shape of the cam groove 22.
  • the breech nut I0 is provided with teeth 24 adapted tobe engaged by corresponding teeth 24' on the hollow screw spindle extension 27 of the plate l9 when the breech is closed. (see Figs. 1 and 5).
  • This arrangement constitutes a dog clutch for a temporarily restricted driving of the breech nut, the mode of operation being as follows: When the breech is closed the said clutch 24, 24 is in full engagement. On opening, that is to say when the plate I9 is rotated, the dog clutch first causes the breech nut I 0 to be rotated along with the plate IS, with the result that the spindle H becomes axially displaced rear- Wardly In this nut, and the tight closure of the gun barrel is thus relieved.
  • FIG. 4 A modified form of construction of the invention is shown in Figs. 4 and 6.
  • the threading rocking member I 3 which projects through a hub of square cross-section, said hub being integral with the breech block 26.
  • the supporting spindle 21 effects the pressing of the breechblock 26 into the position of closure.
  • the breechblock consists of a sufiiciently ruggedly dimensioned disc which closes the end of the barrel 16 in the axial position, through being pressed up by the hollow supporting spindle 27.
  • the disc 26 is slackened back by virtue of the fact that the supporting spindle travels back and takes the disc with it by means of an overhanging rim 25 of semicircular shape engaging with an annular flange 26' on the breech block 26.
  • the rocking member I3 is connected with the lever I l which is provided with a pin I8 engaging in the cam groove 22 of the cam plate.
  • a breech block In a gun, a breech block, a rotatable cam plate mounted coaxially with the gun barrel, and means operable upon rotation of said plate for automatically effecting, in succession, an axial movement of the breech block and an arouate lateral bodily movement thereof, said plate having a cam groove therein, and said means including a rocking member eccentrically journaled in the gun barrel, means connecting said rocking member with said breech block, and a crank pin on said rocking member serving as a cam follower and riding in said cam groove.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
  • Mechanical Operated Clutches (AREA)
US9946A 1934-03-08 1935-03-08 Gun breech Expired - Lifetime US2113209A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS443751X 1934-03-08

Publications (1)

Publication Number Publication Date
US2113209A true US2113209A (en) 1938-04-05

Family

ID=5452871

Family Applications (1)

Application Number Title Priority Date Filing Date
US9946A Expired - Lifetime US2113209A (en) 1934-03-08 1935-03-08 Gun breech

Country Status (3)

Country Link
US (1) US2113209A (fr)
FR (3) FR700913A (fr)
GB (2) GB368243A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2327115B (en) * 1997-07-09 2001-06-06 Rheinmetall Ind Ag Transverse action breech block for a weapon

Also Published As

Publication number Publication date
FR45959E (fr) 1936-01-17
FR700913A (fr) 1931-03-07
GB443751A (en) 1936-03-05
FR43315E (fr) 1934-04-28
GB368243A (en) 1932-03-03

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