US1290835A

US1290835A - Cartridge-case extractor for guns.

Info

Publication number: US1290835A
Application number: US15140717A
Authority: US
Inventors: Herman Jakobsson
Original assignee: Individual
Current assignee: Individual
Priority date: 1917-02-28
Filing date: 1917-02-28
Publication date: 1919-01-07
Anticipated expiration: 1936-01-07

Description

H. JAKOBSSON. CARTRIDGE CASE EXTRACTOR FOR GUNS.

1,290,835. APPLICATION FILED FEB. 28. 1917. Patented Jan: 7 ,1919.

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H. .IAKOBSSON. CARTRIDGE CASE EXTRACTOR FOR GUNS. APPLICATION FILED FEB. 28. 1911.

1,290,835, Patented Jan. 7, 1919.

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I n ve nto r: 74/555; 7/gr'man (fl/{0.555072 Attorney.

HERMAN JAKOBSSON, OF PHILADELPHIA, PENNSYLVANIA.

CARTRIDGE-CASE EXTRACTOR FOR GUNS.

1,290,835. Specification of Application filed February 2 To all whom it may concern:

Be it known that I, HERMAN JAKoBssoN, a citizen of the United States, residing at Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented a new and useful Improvement in Cartridge-Case Extractors for Guns, of which the following is a full, clear, and exact description, refer ence being had to the accompanying drawings, which form a part of this specification.

The object of my invention is to provide a new and improved cartridge case extractor. The invention is particularly applicable to that well known type of gun in which the breech block moves in and out of the breech in a vertical, horizontal or inclined plane, the opening movement taking place, preferably, automatically during the counter recoil of the gun and the closing movement also taking place automatically on the insertion of a fresh projectile and cartridge case. The invention is also applicable to a gun inwhich the breech block is manually operated.

A preferred embodiment of the invention is shown in the accompanying drawings, in which,-

Figure l is a horizontal sectional view of the breech end of the with the breech block in its open position.

Fig. 2 is a transverse section through the breech end of the gun on the line 2-2 of Fig. 3. p I

Fig. 3 is a vertical section on the line 3-3 of Fig. 2.

Fig. 4 is a view, similar to Fig. 3, showing the parts in a different position.

Fig. 5 is a plan view of the cartridgeca'se extractor.

Fig. 6 is a perspective view of the breech block.

Fig. 7 is an inverted plan view of the breech block, together with the cartridge case extractor.

Fig. 8 is an enlarged perspective view of the cartridge case extractor.

Fig. 9 is' an enlarged perspective view of the cam plate for operating the cartridge case extractor.

30 is the gun with its chamber 31 and breech end 32. The latter is provided with a rearward opening 33 and a transverse opening or housing 34 in which the block or wedge 35 is arranged to slide in and out in the breech. The rear wall 36 of the housing is slightly" inclined in conformity with the Patented Jan.7, 1919.

8,1917. Serial No. 151,407.

Letters Patent.

taper of the block 35, so that when the mechanism is open, that is, when the block moves out transversely to the bore axis, it may have a slight rearward movement. To insure the breech block maintaining contact with the wall 36 in whatever position the breech block may be, a gib 37. and a cone spondin'g groove 38 are provided respectively in the housing and the block, the direction of the gib and groove being parallel with the wall 36.

. An operating crank 39, journaled in a lug on the breech 32 and engaging, by means of its head 40,.a cam. groove 41 in the block 35, controls the movement of the block. The crank 39 isactuated by a lever 42, having a handle 43 for manual operation, and c0nnections (not shown) at 44 with some non-recoiling part of the gun carriage, for automatic operation in a suitable manner.

In the center of the block is a bore or chamber for the firing gear, whichcomprises a firing bolt or hammer 45, a firing pin 46, a cocking sleeve 47 a trigger 64 for cocking and firing the gun, and other associated mechanism which need not be further described, the same not being embodied in the invention forming the sub ect-matter of this application, but being fully described, shown and claimed in an application of even date herewith, Serial No. 151,406.

The extractor 80 for the cartridge case 51 has a short arm 81 with a lip 81 fitting under the rim of the cartridge case 51. The long arm extends rearwardly and lies in a suitable guiding groove in the gun breech in such a manner that when the cartridge case is pushed fully in, the rear end of the long arm does not bottom in the groove, as shown in Fig.3. At the junction of the two arms is formed a rounded heel 82 which rests in a socket provided in the breech. This heel constitutes a rigid connection between the two arms. The extreme end of the long extractor arm has a lug 83 provided with a transverse slope 84 and a forward slope 85. When the breech block is moving out, the transverse slope 84 is first struck by a corresponding cam surface 86 on the block. As a consequence, the extractor will turn on its heel 82 which is unyielding and act as a crow-bar, thus loosening the cartridge case in the chamber. As the block proceeds to run out, the forward extractor slope 85 is acted upon by a similar cam surface 87 on the block, thereby 'ausing the extractor to prevent rattling ofthe" extractor when free and to insure move rapidly to the rear, thus imparting a quick e'ection of the cartridge case. To

full control between the inclined cam surfaces, 2. plunger 88, actuated by a spring 89, tends to push the extractor inward. The plunger'also acts as a latch to hold the extractor in its rearward position, as shown'in Fig. 4, and a small notch or recess '90 on the extractor is for this purpose providedfor the .pointof theplunger. The spring. 89 actuates a, t 'which constitutes a' latch for the collar of a second plunger 91,

*stop bolt 92. The endof'bolt 92 works in a r groove93 in the breech block (said groove being inclined-parallel with the wall 36),

thereby limiting the travel of the block in i I respectively the breech, The block and the extractor are 7 provided with abutmentsurfaces 94Lv andt95 hich, upon"contact,.act to hold the block open 7 v,

f'lfheoperation ofthe mechanism is as follows: o

' V ono aagthamahasa, which'wifl be accomplished either by hand, or, if an automatic-opemng device is employed by the latter, turning the operating crank 39 during therecoil or counter recoil of the gun, the

r slope 86 on I the lunderside of the breech bl0ckl3 5 operates'on'theslope 84: of the extractor, ;tilting, it in transverse direction,

7 thereby loosening the cartridge case. A moment laterthe slope 87 on thebreech bloick will hit the forward slope 85 on the extrac tor, which is, as a consequence, violently thrown back intothe position shown in Fig.

. 4; bringingwith' it the empty cartridge case,

- which is thus ejected from the breech. This 7 V 7 caused by the inclineddirection of the groove 93 engagingwiththe bolt 92.

7 empty cartridge case,this bein;1; sure' the engagement of the p I the extractor recess 90, whic 1 isidirectly after pushed inward by o movement of-the block. 7 I a g' Upon again loading the gun, .the ri'm,. of 1 the cartridge-case 51"engagesthe toe 81mm action is still more emphasized by the slightly rearward travel of;the'block,"syn'- chronously with its transversev ithdrawal,

thearm 81 of the extractor, drawing the lat ter--forward,-;thus releasing thej'block, which will how be pfishedi'in to 01036 15119 mechanism J o actuated; by theoperating crank-39. V

' The portion of-the breech' block carrying the sloping faces :and 87' maybe Tmadeiin correspondingly parallel to the gun axis a separate-piece 99, as shown Fig. 9, which may be inserted into the breech block and secured to :its under: surface, thus en- 7 abling it to be easily renewed when worn. Having now 'fullydescribed my invention, what I desireto claim and protect by Letters Patent is: I o 1. In acartridge case extracting mechanism for guns, the combination with a gun having a breech and a sliding'block therein, of an extractor'having two arms and a heel at the junction ofthearms,the breech .hav-

mg a longitudinal groove for the extractor and a socket for the heel, oneof the extractor arms engaging the cartridge case, and. cams. on 't e block adapted, as the block is withdrawn, to first tilt the. extractor. on its heel and then quickly move it, in itsgroove'. 7

it 2, An L-shaped cartridge. case: extractor for guns having; a. movable breech; block," 7 the two arms being of unequal length, a toe on the end of the short armto grip: under. the'cartridge case rim, a rounded heel forming-the connection between the two, arms of the extractor, the long arm tapering in the direction rof its rear end, a lug at the. end of the long arm, said lug being provided with inclined surfaces sloping transversely: and longitudinally to saidlong arm respectively the breechblock being provided withlcorre- 'spondingly inclined. surfaces, whereby the block when opened will contact first with the transversely inclinedtsurfaceito tilt the extractor around saidfiheel and thereupon I contact with the longitudinally. slopingsun face to give the extractor a sudden straight rearward movement in; the longitudinal din rectiori ofits long arm.

3. A combined cartridge-caseextractor and ejectorfor gunshaving a'slidable breech the principle of. a crowbar having a: long and ashortarm rigidly. connected ;;:the short arm having a thin edge; intended to engage the cartridge casefirim' a rounded heel formed at thecorner'of connection of- -;said arms atransversely sloping; surface and a longitudinally sloping surface on said long arm, the 'breechblock gbeing.provided with sloping surfaces vand the gun with a socket for said-heel and aihou'sing for said long "arm runningrinaiidirection lock being moved to open; said transversely sloping surfaces are first made' to contact,

thus swinging the. extractor on its heel, and said longitudinally.

sloping-j surfaces: thereuponmade to contact, thus sliding-gtheex tractorfrearwardly in said housing, thereby causing the jcartridge'case first to be extract ed andthen ejected fromjthegun' chamber.

4; A 'fcombined cartridge cas'e extractor ;'whereby,.upen the f and ejector forguns-having a slidable. breech V block; said: extractor being constructed on; the principle :ofa crowbar --hav1ng -aj long 105 block; vsaidTextractor being'constructed on and a short arm rigidly connected; the short arm having a thin edge intended to engage the cartridge case rim; a rounded heel formed at the corner of connection of said arms, a transversely sloping surface and a longitudinally sloping surface on said long arm, the breech block being provided with correspondingly sloping surfaces and the gun With a socket for said heel and a houslng for said long arm running in a direction parallel to the gun axis; a spring actuated plunger in the gun, the extractor having a recess for engaging with said plunger where the extractor stands in its retracted position;

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents,

Washington, D. 0.