US2415952A

US2415952A - Extractor-ejector for firearms

Info

Publication number: US2415952A
Application number: US582655A
Authority: US
Inventors: Crawford C Loomis
Original assignee: Remington Arms Co LLC
Current assignee: Remington Arms Co LLC
Priority date: 1945-03-14
Filing date: 1945-03-14
Publication date: 1947-02-18
Anticipated expiration: 1964-02-18

Description

- Feb. 18, 1947. i c, c, ooms 2,415,952

EXTRACTOR-EJECTOR FOR FIREARMS 7 Filed march 14, 1945 s Sheets- Shet 1 I l I I 56 53153, 25 45 INVENTOR 55 50 v BRP VFURD E1. Lnumra Feb. 18, 194% c. c. LooMls 2,415,952

EXTRACTOR-EJECTOR FOR FIREARMS Filed March 14, 1945 s' Sheets-Sheet 2 INVENTOR DRA RD E. Lam [r5 ATTORNEY Feb. 18, 1947. c, c oo s 2,415,952

EXTRACTOR-EJECTOR FOR FIREARMS Filed March 14, 1945 5 Sheets-Sheet 3 INVENTOR EggMFDRD BLBUME ATTORNE7 m Patented Feb. 18, 1947 UNITED STATES NT GFFICE EXTRACTOR-EJECTOR FOR FIREARMS Application March 14, 1945, Serial No. 582,655

8 Claims.

The present invention relates to firearms, and

particularly to that type of firearms known as. a cement kiln gun and which is adapted to be removably mounted upon one end of a cylindrical cement kiln for the purpose of removing clinker rings and other obstructions adhering to the inside of the kiln. Ihis type of gun is disclosed in its general principles of design and operation in, the United States patent to G. H. Garrison for Burning kiln, No. 1,767,281, granted June 24, 1930.

An object of the invention is to provide an improved extractor-elector mechanism for the positive extraction of the shell after firing, and whereby the shell is initially pried loose from the chamber of the barrel and is thereupon automatically elected under spring action. It is particularly proposed to provide an extractoreiector mechanism cooperatively related to a vertically movable breech block, wherein cooperating cam means is provided upon the breech block for actuating an extractor-ejector and an ejector releasing sear through the opening movement of the breech block, and in such a manner that the shell which has been initially loosened is not ejected under spring action until the breech block is in its fully open position with the loading and ejecting channel thereof in line with the barrel chamber.

With the above and other objects in view, an embodiment of the invention is shown in the accompanying drawings, and this embodiment will be hereinafter more fully described with reference thereto, and the invention will be finally pointed out in the claims.

In the drawings:

Fig. 1 is a side elevation of a firearm, according to the invention, shown mounted in its operative relation upon the end of a cement kiln.

Fig. 2 is a side elevation, on an enlarged scale, of the breech block end of the firearm, the extractor-ejector mechanism cover plate being removed, and the breech block being shown in its raised closed position and with the hammer cocked preliminary to firing.

Fig. 3 is a plan view of the breech block of the firearm as shown in Fig. 2.

Fig. 4 is a horizontal sectional view, taken along the line 4-4 of Fig. 2;

Fig. 5 is a vertical sectional the line 5-5 of Fig. 2.

Fig. 6 is a side elevation of the breech block yoke member detached from the firearm, and with the extractor-ejector mechanism parts removed.

view, taken along Fig. 'l is a side elevation of the extractor-ejector member.

Fig. 8 is a plan view of the extractor-ejector member.

Fig. 9 is a side elevation of the extractor-ejector releasing sear.

Fig. 10 is a plan view of the extractor-ejector releasing sear.

Fig. 11 is a side elevation, partially in vertical section, showing the extractor-ejector mechanism as initially operated through opening movement of the breech block to pry the shell loose.

Fig. 12 is a side elevation, partially in vertical section, showing the extractor-ejector mechanism in its fully actuated position to automatically eject the shell under spring action.

Similar reference characters indicate corresponding parts throughout the several figures of the drawings.

Referring to the drawings, the cement kiln I0 is provided in its end with an opening ll, below which there is secured an I-beam l2 upon which is mounted a bolster l3. Removably engaged in the bolster are the trunnion supports M of the bed N5 of the gun assembly, a supporting arm l5 being pivotally connected to the trunnion supports l4 and adapted to rest at its lower end against the face of the kiln, and an extensible turn buckle connection I! being pivotally connected between the underside of the bed and the lower end of the arm l6, which upon being turned by means of the hand wheel l8 imparts vertical swinging movement to the bed I5 about the trunnion supports I4 to pivotally shift the axis of the gun vertically.

Upon the bed l5 there is mounted a cradle l9, pivotally connected thereto at its forward end by a pivot stud 2B, and adapted to be laterally shifted about the stud 28 by means of a traverse screw 2| connected to a traverse bolt 22 engaged through an arcuate slot 23 in the bed and secured in the base of the cradle. A handle 24' is provided upon the lower end of the bolt 22, to tighten it to secure the position of lateral adjustment of the cradle, and to loosen it to permit actuation of the traverse screw to impart lateral swinging movement to the cradle. The cradle is provided with a rearwardly projecting platform portion 25, having a flat horizontal upper surface upon which the yoke member 26 of the gun is mounted for sliding movement under recoil action of the gun, a

handle extension 21 being provided at its rearward end for the convenient manipulation of the gun. The gun barrel 28 is secured in a pocket 29 in the yoke by means of a barrel nut 36, and extends forwardly through apertured standards 3| and 32 provided upon the cradle, recoil and

counter-recoil springs

33 and 34 being en aged about the barrel between the standards 3| and 32 at each side of a spring spacer 35 removably secured upon the barrel.

The yoke 26 is provided with a. vertically disposed breech block passage 36, of rectangular outline and with its forward wall coincidental to the rearward end of the gun barrel with the shell receiving chamber 3! of the barrel opening therein. Rearwardly of the passage 36 the yoke is provided with a shell loading and ejecting channel 38, in the base of which there is provided a slot 39 in which the hammer releasing sear 40 is pivotally mounted upon a pivot pin 4!, being pivotally connected to a shackle 42 provided with a lanyard eye bolt 43 extended through a passage 44, and to which the lanyard 45 is connected, the sear being normally pressed forwardly by means of a spring 46.

The breech block 41 is of rectangular crosssection and is mounted for vertical reciprocation in the passage 36, its lower end projecting below the yoke into an opening 25 in the platform extension 25 of the cradle, where it is provided with a transverse rotary stud shaft 48 having its projecting bearing stud end 49 engaged in the slot 50 of an operating arm this arm being engaged at its forward end in a slot 52 extended forwardly from the opening 25 and mounted for swinging movement therein upon a transverse operating shaft 53 provided upon its outer end with an operating hand lever 54. A detent recess 55 is provided in the forward' end of the arm 5|, and is engaged by a spring pressed plunger 56 which normally maintains the arm in its horizontal raised position, the detent plunger being released through rearward swinging of the hand lever 54 to swing the operating arm 5| to thereby impart downward opening movement to the breech block. Upward movement of the operating arm and the breech block is limited by engagement of the rearward end of the arm with the under side of the yoke, while downward movement is limited by a stop pin 51 provided in the yoke and projecting into a vertical slot 58 in one side of the breech block, engagement of the upper end of this slot with the pin determining the limit of downward movement of the breech block.

I The breech block is provided with a spring retractible firing pin 59 and a hammer 60, the latter being pivotally mounted upon a pin 6| within a pocket 65*- in the rearward side of the breech block and adapted to be engaged with the end of the firing pin through the action of a vertically movable spring actuated plunger 62 provided in the breech block. The hammer is provided with a tooth 63 which in the lowered open position of the breech block is in vertical line with the tooth of the sear 40, so that as the breech block is raised to its closed position the tooth 63 is engaged by the sear and the hammer is swung in clockwise direction to its cocked position preliminary to firing, as shown in Fig. 2, being released through pull of the lanyardand retraction of the sear 40.

. In one side wall of the yoke 26 there is provided a rectangular recess 64 for receiving the cover plate 65 of the extractor-ejector mechanism, this cover plate being normally secured in place by screws 66.- Within the recess 64 there is provided a pocket formation including an upper horizontal slideway portion 61 for receiving the extractorejector member and a lower sear receiving portion 68, the slideway portion 6'! being provided with a slot 63 opening to the breech block passage 36 and to an extractor-ejector receiving notch III in the end of the gun barrel, the forward end wall ll of the slot 69 being diagonally inclined and in line with the diagonally inclined forward wall of the notch 15. The pocket portion 68 is provided at one end with a pivot stud receiving pocket 12 and at its other end with a circular hole 13 opening into the breech block passage 35. The upper and lower walls of the slideway pocket portion El are provided with transversely disposed notches M, and extending rearwardly from these notches adjacent the vertical wall of the pocket there are provided channel grooves 15, for the purpose of receiving retaining lugs provided on the extractor-ejector member, as will presently more fully appear. The upper pocket portion 61 is connected to the lower pocket portlon 68 by a neck portion 16.

The extractor-ejector member 11 is of rectangular cross-section and is engaged for horizontal sliding movement in the slideway portion 61, being provided at its upper and lower sides with pairs of lugs 18 transversely engaged through the notches M in assembling the slide, and slidably engaged in the channel 15 in the operative position thereof. A longitudinal pocket 19 extends forwardly from the rearward end of the extractor-ejector member and is engaged by a plunger 85 upon which outward pressure is exerted by a spring 8|, this plunger bearing upon the forward end of the slideway B1 and exerting rearward spring pressure upon the extractor-ejector member.

Upon the inner face of the extractor-ejector member there is provided a longitudinal rib 82 slidably engaged in the slot 69, and upon the rearward end of this rib and projecting inwardly therefrom there is provided an extractor-ejector finger 83 normally seated within the notch 10 of the gun barrel and projecting into the shell receiving chamber to engage behind the extraction flange 84 of the shell 85. Upon the rearward end of the rib 82 there is provided an inwardly projecting stud 86 engaged in a vertical cam groove 8? in the side wall of the breech block, this cam groove being provided near its upper end with an upwardly and rearwardly inclined cam surface 88 extending to a rearwardly ofiset vertical cam surface 89, the latter forming the forward wall of a horizontally widened upper end portion of the cam groove, its rearward wall being formed by a a downwardly and forwardly inclined cam surface Forwardly of the upper end of the cam groove 8'? the breech block is provided with an extractorejector receiving opening 9! extending from the side wall of the breech block inwardly along the forward wall to the loading and ejecting channel 92 in the upper end of the breech block, the bot-Y,

tom wall of this channel being inclined downwardly at its forward end as at 93, and extending horizontally from this inclined portion to the rearward wall of the breech block.

Upon the lower side of the extractor-ejector member there-is provided a downwardly projecting tooth 94 for cooperation with the extractorejector releasing sear. The extractor-ejector releasing sear 95 is of rectangular cross-section and is provided at one end with an inwardly projecting pivot stud 93, pivotally engaged in the pocket 12,

and at its other end with an inwardly projecting stud 91 engaged through the hole 13 with a vertically disposed cam groove 98 in the side wall of the breech block. Engagement of the upper end of the cam groove with the stud 91, through lowerin movement of the breech block, depresses the sear to release the extractor-ejector member, and as will hereinafter more fully appear. Upon the upper side of the sear there is provided a looking tooth $9 normally disposed in rearwardly opposed spaced relation to the tooth 94 of the extractor-ejector member, and in its lower side there is provided. a pocket it!!! in which is engaged a spring Iill, which normally maintains the sear in its raised locking position.

In operation, the breech block is closed in its upwardly raised position, as shown in Fig. 2, and in this position the extractor-ejector member 11 is in its forwardly moved position where it is retained through engagement of its stud 86 with the vertical parallel walls of the cam groove 81. The extractor-ejector releasing sear 95 is in its raised position under the pressure of its spring "H, with its tooth 59 in rearwardly opposed spaced relation to the tooth 96 of the extractorejector member. After firing of the gun the breech block is opened by pulling the operating hand lever 54 rearwardly, as shown in Fig. 11, and as the stud 8B of the extractor-ejector member is engaged with the inclined cam surface 88 of the cam groove 81 the extractor-ejector member is positively shifted in ejection direction until the stud reaches the upper vertical portion 89 of the cam groove and the tooth 94 of the extractorejector member comes into contact with and is restrained by the tooth 99 of the extractor-ejector releasing sear. Thus the shell is forcibly pried loose from the chamber 3? of the gun barrel. At this point the upper end of the cam groove 9% is in contact with the stud 91 of the extractor-ejector releasing scar, and as the final downward opening movement of the breech block is completed, as shown in Fig. 12, the sear is swung downwardly, releasing the extractor-ejector member, which thereupon is projected rearwardly through. the action of the spring pressed plunger Bil, causing the shell to be ejected through the channels $2 and 38 of the breech block and yoke. Upon upward closing movement of the breech block the rearward inclined cam surface 953 at the upper end of the cam groove 8'! forces the extractor-ejector member forwardly, so that the extractor-ejector finger 83 is clear of the breech block passage 36 as the breech block is moved to closed position. At the same time, the extractor-ejector releasing sear springs upwardly to its normal position, with its tooth 99 in rearwardly opposed spaced relation to the tooth 94 of the extractor-ejector memher.

The form of the invention illustrated in the drawings and described herein is typical and illustrative only, and it is evident that the invention is capable of embodiments in other forms, all falling Within the scope of the appended claims, which are to be broadly construed.

What is claimed is:

1. In a firearm, a yoke having a vertical breech block passage, a barrel engaged in said yoke having a shell receiving chamber opening into said passage and an extractor-ejector receiving slot extending to said chamber and also opening into said passage, a breech block vertically movable in said passage to open and close said chamber, a spring pressed extractor-ejector movably mounted in said yoke and having an extractorejector finger normally engaged in said slot of said barrel, cam means carried by said breech block engaged with said extractor-ejector to impart extracting movement thereto through opening movement of said breech block, a scar movably mounted in said yoke and normally opposed to said extractor-ejector to block the initial extracting movement of said extractor-ejector to a predetermined extent, and cam means on said breech block constructed and arranged to engage said sear to move it into extractor-ejector releasing position to permit ejecting movement of said extractor-ejector under spring action.

2. In a firearm, a yoke having a vertical breech block passage, a barrel engaged in said yoke having a shell receiving chamber opening into said passage and an extractor-ejector receiving slot extending to said chamber and also openinginto said passage, a breech block vertically movable in said passage to open and close said chamber, a spring pressed extractor-ejector movably mounted in said yoke for horizontal extracting and ejecting movement and having an extractorejector finger normally engaged in said slot of said barrel, cam means carried by said breech block engaged with said extractor-ejector to impart horizontal extracting movement thereto through opening movement of said breech block, a sear movably mounted on said yoke and normally opposed to said extractor-ejector to block the initial extracting movement of said extractorejector to a predetermined extent, and cam means on said breech block constructed and arranged to engage said sear to move it into extractor-ejector releasing position to permit ejecting movement of said extractor-ejector under spring action. 7

3. In a firearm, a yoke having a vertical breech block passage, a barrel engaged in said yoke having a shell receiving chamber opening into said passage and an extractor-ejector receiving slot extending to said chamber and also opening into said passage, a breech block vertically movable in said passage to open and close said chamber, a spring pressed extractor-ejector movably mounted in said yoke for horizontal extracting and ejecting movement and having an extractor-ejector finger normally engaged in said slot of said barrel, cam means carried by said breech block engaged with said extractor-ejector to impart extracting movement thereto through opening movement of said breech block, a sear pivotally mounted in said yoke and normally horizontally opposed to said extractor-ejector in, predetermined spaced relation to block the initial extracting movement of said extractorejector to a predetermined extent, and cam means on said breech block constructed and arranged to engage said sear to swing it into extractor-ejector releasing position to permit ejecting movement of said extractor-ejector under spring action.

4. In a firearm, a yoke having a vertical breech block passage, a barrel engaged in said yoke having a shell receiving chamber opening into said passage and an extractor-ejector receiving slot extending to said chamber and also opening into said passage, a breech block vertically movable in said passage to open and close said chamber, a spring pressed extractor-ejector movably mounted in said yoke for horizontal extracting and ejecting movement having an extractorejector finger normally engaged in said slot of said barrel, and having an actuating stud, said breech block having a vertically arranged cam groove engaged by said extractor-ejector stud and including a parallel walled extractor-ejector retaining portion and an inclined movement imparting portion constructed and arranged to impart extracting movement to said extractorejector through opening movement of said breech block, a sear movably mounted in said yoke and normally opposed to said extractor-ejector to a predetermined extent, and cam means on said breech block constructed and. arranged to engage said sear to move it into extractor-ejector releasing position to permit ejecting movement of said extractor-ejector under spring action.

5. In a firearm, a yoke having a vertical breech block passage, a barrel engaged in said yoke having a shell receiving chamber opening into said passage and an extractor-ejector receiving slot extending to said chamber and also opening into said passage, a breech block vertically movable in said passage to open and close said chamber, a spring pressed extractor-ejector movably mounted in said yoke for horizontal extracting and ejecting movement having an extractor-ejector finger normally engaged in said slot of said barrel, and having an actuating stud, said breech block having a vertically arranged cam groove engaged by said extractor-ejector stud and including a parallel walled extractorejector retaining portion and an inclined movement imparting portion constructed and arranged to impart initial extracting movement to said extractor-ejector through opening movement of said breech block, and further including a horizontally extending space in which said stud may have ejecting movement, a sear movably mounted in said yoke and normally opposed to said extractor-ejector to block the initial ex-- tracting movement of said extractor-ejector to a predetermined extent, and cam means on said breech block constructed and arranged to engage said sear to move it into extractor-ejector releasing position to permit ejecting movement of said extractor-ejector under spring action.

6. In a firearm, a yoke having avertical breech block passage, a barrel engaged in said yoke having a shell receiving chamber opening into said passage and an extractor-ejector receiving slot extending to said chamber and also opening into said passage, a breech block vertically movable in said passage to open and close said chamber, a spring pressed extractor-ejector movably mounted in said yoke and having an extractorejector finger normally engaged in said slot of said barrel, cam means carried by said breech block engaged with said extractor-ejector to impart extracting and ejecting movement thereto through opening movement of said breech block, and a sear pivotally mounted in said yoke and normally opposed to said extractor-ejector to block the initial extracting movement of said extractor-ejector to a predetermined extent and having an actuating stud, said breech block having a vertical cam groove engaged by said stud constructed and arranged through opening movement of said breech block to depress said stud to move said sear into extractor-ejector releasing position to permit ejecting movement of said extractor-ejector under spring action.

7. In a firearm, a yoke having a vertical breech block passage, a barrel engaged in said yoke and having a shell receiving chamber opening into said passage and having an extractor-ejector receiving slot extending to said chamber and also opening into said passage, a breech block vertically movable in said passage to open and close said chamber, said yoke having a horizontal slideway having transverse notches and channel grooves extending longitudinally from said notches, a spring pressed extractor-ejector slidably engaged in said slideway having lugs transversely engageable with said notches and longitudinally engaged in said channel grooves and having an extractor-ejector finger normally engaged in said slot of said barrel, cam means car-- ried by said breech block engaged with said extractor-ejector to impart movement thereto through opening movement of said breech block, a sear movably mounted in said yoke and normally opposed to said extractor-ejector to block the initial extracting movement of said extractor-ejector to a predetermined extent, and cam means on said breech block constructed and arranged to engage said sear to move it into extractor-ejector releasing position to permit ejecting movement of said extractor-ejector under spring action.

8. In a firearm having a barrel, a frame, and a breech block slidably mounted in said frame; means to extract and eject a shell from said barrel comprising a spring loaded extractorejector and an extractor-ejector retaining sear mounted in said frame; and cam means carried by said slidable breech block arranged initially to actuate said extractor-ejector to efiect extraction of a shell from said barrel and subsequently to actuate said sear to release said extractorejector and permit ejection of said shell.

CRAWFORD C. LOOMIS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 669,520 Fyrberg Mar. 12, 1901 1,322,287 Burton Nov. 18, 1919