US2998756A - Ramming device for firearms - Google Patents

Ramming device for firearms Download PDF

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Publication number
US2998756A
US2998756A US779641A US77964158A US2998756A US 2998756 A US2998756 A US 2998756A US 779641 A US779641 A US 779641A US 77964158 A US77964158 A US 77964158A US 2998756 A US2998756 A US 2998756A
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US
United States
Prior art keywords
ramming
lug
cross
bar
firearm
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
US779641A
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English (en)
Inventor
Christiansson Carl Mauritz
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.)
Saab Bofors AB
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Bofors AB
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Publication date
Application filed by Bofors AB filed Critical Bofors AB
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Publication of US2998756A publication Critical patent/US2998756A/en
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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
    • F41A9/00—Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
    • F41A9/38—Loading arrangements, i.e. for bringing the ammunition into the firing position
    • F41A9/39—Ramming arrangements
    • F41A9/42—Rammers separate from breech-block

Definitions

  • ramming devices are provided with a ramming lug that is actuated by a spring forcewhich executes the ramming movement of the lug and which is intended to be cocked by the recoiling parts ofthe firearm. Since the length of movement of the recoiling parts varies, it is necessary to design the ramming device in such a way that the cocking of the ramming lug is always completed, even at the recoil length. It is also important that the recoiling parts execute their maximum movements without damaging any parts of the ramming assembly. Proper design and cooperation between associated parts are even of greater importance in automatic weapons of large calibers that are designed for a high rate of fire.
  • Another object of the present invention is to provide a ramming device for automatic firearms in which the movement of the ramming lug is cushioned in, both the ramming and cocking directions so as to impart minimum shocks to the operating parts.
  • An additional object of the present invention is to;
  • a cocking assembly for automatic firearms in which the length of travel of the ramming lug toward the ramming position is automatically adjusted in response to changes in the firing elevation of the firearm soas to provide for theaddit'ional amount of-ener-gy-that is re-' quired to move a round from a ramming position to a chamber position at increased firing elevations.
  • Still a further object of the present invention is to provide a ramming assembly for recoiling type automatic; firearms which will automatically relieve the cocking parts of the ramming lug from the continued application.
  • FIGURE 1 is a fragmentary perspective view of an automatic firearm embodying a ramming device made in accordance with the present invention
  • FIGURE 2 is a transverse cross-section taken along line 22 of FIGURE 1 showing the cross-bar forming a part of the present invention in an initial position;
  • FIGURE 3 is similar to FIGURE 2, showing the crossbar in a cocking position
  • FIGURE 4 is a side view of a firearm embodying a cocking mechanism made in accordance with the present invention in several elevated .positions.
  • a cocking mechanism made in accordance wth the present invention is shown in operative association within an automatic type firearm.
  • This mechanism includes a frame 1 that is fixed to the elevating non-recoiling parts of the firearm, and is provided with a pair of elongated slots 2 which support a cross-bar 3 for reciprocating longitudinal move- United States a Patent ment therewithin.
  • the center rearwardly facing portion of the cross-bar 3 has a buffer device 4 of any desired type that serves as a cushion when engaged by the ramming lug 12 which will be hereinafter more fully described.
  • the ends 3a of the cross-bar 3 extend outwardly through the slots 2 and are provided with obliquely formed bearing surfaces, 5, facing in opposite directions, that are intended to coact with mating surfaces 6 on actuated bars 7 that are fixed to recoiling parts of the elevating mass that includes the barrel and breech easing of the firearm.
  • a pair of rods 8, having head 9 at one end'and piVotally connected to actuating levers 10 by means of pins 10a at the opposite end extend alongside and parallel to the frame 1.
  • - ramming lug 12 is slidably' supported within inwardly opening grooves 13 in the opposite sides of the main frame 1 for reciprocating longitudinal movement between an initial cocked position illustrated in FIGURE 1, and an actuated ramming position in abutment with the bufier device 4 of the cross-bar 3.
  • the ramming lug 12 In the initial position, the ramming lug 12 is releasably locked in the retracted cocked .position against the action of a spring force source 12a by a suitable latch mechanism that may be automatically controlled by associated parts of the firearm.
  • the ramming ing As soon as the ramming ing is released, it'moves forwardly under the action of the spring force source 12a to drive the next round into the firing chamber of the. firearm, the forward ramming movement of the lug 12 being limited by the position of the buifer device 4 car-; ried by the cross-bar 3.
  • the recoiling bars 7 move rearwardly into driving engagement with the outer ends 3a of the crossbar 3 and move the cross-bar 3 rearwardly against the action of the compression coil springs 14. Such rearward move- As the cross-bar 3 approaches the rearmost part of its.
  • the oblique surfaces 6 of the recoiling bars 7 direct the opposite ends 3;: of the cross-bar 3 into oppositely directed oblique terminal portions'15, 16 of the slots 2,' whereby continued rearward movement of the recoiling bars 7 bypasses the ends 3a of the cross-bar, as shown in phantom lines in FIGURE 1, and in FIGURE 3.
  • the cross-bar 3 is held in the position shown in phantom lines in FIGURE 1, the cross-bar then being pressed againstthe oblique terminal portions 15 and 16 under the influence of the spring force source 12a of the ramming lug.
  • the springs 14 strive to move the cross bar 3 towards the said oblique terminal portions 15 and 16. Due to the obliquity of these portions, the said spring forces also strive to turn the crossbar 3 towards the bars 7.
  • the oblique surfaces 6 of the bars 7 pass the oblique surfaces 5 on the ends 3a of thecross-bar 3 during the runout movement, because of the turning of the cross-bar 3 the oblique surfaces 5- will immediately follow the obliqu'e surfaces '6, without;
  • cam means are provided in accordance with the present invention which serve to adjust the ramming stroke of the ramming lug 12.
  • the levers 10 to which the rear ends of the rods 8 are pivota'lly connected are secured to one or more rock shafts 11 that are rotatably carried by the main frame of the firearm which may be rotatably supported by bearings upon a stationary mount 19 for movement between selected fin'ng angles.
  • a follower 23 eccentrically carried by each such rock shaft 11 is in sliding or rolling engagement with an arcuate cam or guide rail 20 that has a center of curvature 21 which is eccentric with the pivot axis 18 of the main frame of the firearm.
  • the follower 23 secured to the outer end of the lever 22 of each such rock shaft 11 automatically adjusts the position of the rods 8 relative to the main frame or breech casing 17 of the firearm.
  • the movement of the rods 8 is such that as the firing angle of the firearm is increased, the stops or heads 9 are moved forwardly to increase the length of stroke of the ramming lug 12, and as the firing angle of the firing arm is decreased, the limit stops 9 of the rods 8 are moved relatively rearwardly so as to decrease the forward ramming stroke of the ramming lug 12.
  • FIGURE 1 The entire mechanism shown in FIGURE 1 is arranged within the firearm. Only the shaft 11 extends outside the breech casing, as shown in FIGURE 4, with the arms 22 and follower 23 disposed on the exterior of the casing.
  • a recoiling automatic firearm pivotally supported upon a mounting for adjusting firing elevation thereof, said firearm having a main frame slidably supporting a ramming lug for retractable ramming movement in one direction by a spring force source acting between said lug and said main frame, a cross-bar slidably supported for reciprocating longitudinal movement upon said frame for moving said ramming lug in an opposite direction into a cocked position, abutment means carried by said cross-bar for driven movement by recoiling parts of the firearm in said opposite direction from an initial position, guide means carried by said frame effecting partial rotation of said cross-bar out of the path of movement of the recoiling parts of the firearm upon complete retraction of said ramming lug into said cocked position, limit stops carried by said frame in the path of return movement of '4 said cross-bar in said one direction limiting the return movement of said cross-bar relative-te-said cocked position of said ramming lug, a buifer
  • said limit stops comprise a pair of rods each having heads at one end adjacent to the released position of said lug, the opposite ends of said pair of rods being pivotaily supported upon said 'frame adjacent to the cocked position of said lug,-the opposite endear said cross-barbeing slidablysupported upon said rods, and a compression coil spring encircling each of said rods yieldably urging said cross-bar in a direction toward said heads of said rods to return said cross-bar to said initial position.
  • a recoiling automatic'firearm asset forth in claim 2 further comprising arock shaft pivotally'supported upon said man frame, a-pair of'ievers-each secured at one end upon said rock shaft and pivotally seeured'at the opposite end ofsaid opposite end of each said red, a stationary cam carried by said main frame, and a follower eecentricailysecured upon said rock shaft acting against said cam during-changes in said firing ele vation of said firearm.
  • a ramming device for a recoiling'automatic having a main frame, a ramming lug slidably supported upon said mainframe for retractable rammingmovement in one direction, a spring forcesourceacting between said ramminglug andsaid main frame yield.
  • said guide means including a pair of longitudinal slots in said main frame slidablyreceiviflg' the opposite ends of said cross bar therethrough, each of said slots being a terminalportion adjacent; to said cocked, position of said ramming lug 'angularly relatedto the line of movement of said cross bar, said terminal portions of both of said slots extending'inoppositel d rections to a commodate limited turning movement of said cross bar out of the path of movement of said recoiling parts of the fuearm.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Escalators And Moving Walkways (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
US779641A 1957-12-14 1958-12-11 Ramming device for firearms Expired - Lifetime US2998756A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1136057 1957-12-14

Publications (1)

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US2998756A true US2998756A (en) 1961-09-05

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US779641A Expired - Lifetime US2998756A (en) 1957-12-14 1958-12-11 Ramming device for firearms

Country Status (6)

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US (1) US2998756A (en:Method)
BE (1) BE573111A (en:Method)
CH (1) CH366217A (en:Method)
FR (1) FR1208800A (en:Method)
GB (1) GB844990A (en:Method)
NL (2) NL105396C (en:Method)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112350109A (zh) * 2020-11-02 2021-02-09 江苏国美特实验设备有限公司 一种内置定位器可分离式智能模块管理装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1217959A (en) * 1916-06-15 1917-03-06 Franciszek Klaput Breech-loading ordnance.
US2564360A (en) * 1939-11-09 1951-08-14 Hammar Victor Balancing system for gun elevating mechanism
US2660928A (en) * 1946-04-15 1953-12-01 Owen W Marlow Rammer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1217959A (en) * 1916-06-15 1917-03-06 Franciszek Klaput Breech-loading ordnance.
US2564360A (en) * 1939-11-09 1951-08-14 Hammar Victor Balancing system for gun elevating mechanism
US2660928A (en) * 1946-04-15 1953-12-01 Owen W Marlow Rammer

Also Published As

Publication number Publication date
CH366217A (de) 1962-12-15
GB844990A (en) 1960-08-17
NL105396C (en:Method)
FR1208800A (fr) 1960-02-25
BE573111A (fr) 1959-03-16
NL234211A (en:Method)

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