Патент USA US3054216код для вставки
Sept. 18, 1962 E. J. RALEIGH MEANS FOR RETAINING MAGAZINE-FED FIREARM CARTRIDGES ‘IN BOLT PICKUP POSITION Filed Jan. 15, 1961 IN VEN TOR EdmnndIRn'lei h j}. Way-ma ¢ Q-JQWML United States Patent O?lice 3,054,206 Patented Sept. 18, 1962 1 2 MEANS FOR RETAINING MAGAZINE-FED FRE 3,054,206 zine 20 are forced by a spring 26 therein towards neck 24 as the leading cartridge therein is removed by bolt 14. Provided in receiver 12 is a chamber section 32 of ' ARM CARTRIDGES IN BOLT PICKUP PQSTTION rectangular cross-section, which extends rearwardly into Edmond J. Raleigh, ‘West Spring?eld, Mass., assignor to the United States of America as represented by the Secretary of the Army Filed Jan. 13, 1961, Ser. No. 82,660 4 Claims. (Cl. 42-18) (Granted under Title 35, US. Code (1952), see. 266) receiver 12 from the rear end of well 18 and which is open at the top to channel 16. Chamber section 32 is terminated at the rear end by a wall 34 which extends vertically upward to channel 16. A bore 36 extends longitudinally rearward from wall 34 to a bottom 37 10 and receives a compressible coil spring 38 for contact The invention described herein may be manufactured therewith. A buffer-retainer 40 includes a cylindrical shaft 42, ‘and used by or for the Government for governmental which is slidingly received by bore 36 forwardly of purposes without the payment of any royalty thereon. spring 38, and an integral plate 44 laterally disposed on This invention relates to magazine fed ?rearms with reciprocating bolts and more particularly to devices for 15 the front end of the shaft. Plate 44 has a rectangular supporting the top cartridges in a magazine so as to assure cross-section of approximately the same dimensions as those of chamber section 32 so that the plate is slidingly positive pickup by the bolt and to bu?er devices for resiliently stopping the bolt in the recoil position thereof and energizing the bolt for counterrecoil ?ight. received thereby. The top of plate 44 extends upwardly the recoil to the battery position, a non?ring condition ward displacement of buffer-retainer 44) is limited by the into channel 16 and is provided with an arcuate, mating With those ?rearms which ?re at a rapid rate and 20 relief 45 for bolt 14. The free end of shaft 42 contacts the front end of have a reciprocating bolt which transfers a cartridge from spring 3% to bias buffer-retainer 4t} forwardly. The for a magazine to the barrel chamber when traveling from contact of a stop 46 extending radially from shaft 42 oftentimes develops through the leading cartridge in the magazine being below the path of travel of the bolt when 25 with the front end of a slot 48 extending upwardly from bore 36 to channel 16. The rearward displacement of passing thereby. This condition is caused by the surge produced in the magazine spring, as it functions to move buffer-retainer 413 is limited by the contact of plate 44 the cartridges in the magazine upwardly therein when the leading cartridges are successively removed by the bolt, with wall 34. Extending forwardly from plate 44 is a pair of laterally and the rapid rate of ?re which does not permit time 30 spaced tines 5'0 which, when buffer-retainer 40 is rear wardly displaced, are retracted within chamber section for the surging to subside in the spring between the cyclic 32. When buffer-retainer 4-0 is forwardly displaced, functions thereof. tines 5d extend through an opening 51 in the rear side It is, therefore, an object of this invention to provide of magazine 2i) for engagement with the underside of a retainer device which supports the leading cartridge in a magazine to assure pickup by the bolt. 35 the base of cartridge 22 in neck 24. Tines 50 are spaced apart a distance slightly less than the diameter of the It is another object of this invention to provide such base of cartridge 22 and are vertically positioned so as a retainer device which is actuated by the bolt. to be insertable into the clearances on opposite sides of It is a further object of this invention to provide such the area of contact between the leading cartridge in a retainer device which also serves as a buffer for the bolt. The speci?c nature of the invention as well as other 40 neck 24 and the next succeeding cartridge when the objects and advantages thereof will clearly appear from leading cartridge is positioned for pickup by bolt 14. By tines 5% being so spaced apart the succeeding car tridge 22 in magazine 24} is displaceable a portion of the pitch of movement of the cartridges in neck 24 when FIG. 1 is a longitudinally cross-sectioned view of a ?rearm receiver showing the bolt disposed between the 45 the leading cartridge is removed therefrom. Whereby, such succeeding cartridge 22, now the leading cartridge, battery and recoil position thereof and the leading car has to be displaced only slightly more than a half-pitch tridge in the magazine engaged with the underside of the when released, as hereinafter described, by butter retainer; retainer 40 to the position in neck 24 for pickup by FIG. 2 is a fragmentary view similar to FIG. 1 but showing the bolt stopped in the recoil position by the 50 bolt 14. Provided on the front portion of each of the tines 50 buffer-retainer and the leading cartridge in the magazine is a spiral ramp 52 which extends rearwardly and up released by the retainer for displacement to the position a description of a preferred embodiment as shown in the accompanying drawing in which: for pickup by the bolt; wardly from the front end thereof. Ramps 52 assure the engagement of the base of the leading cartridge 22 in buffer-retainer forwardly displaced to extend the forward 55 neck 24 by tines 50 when buffer-retainer 40 is forwardly end thereof into engagement with the pickup position displaced. Tines 50 are disposed so that, when extended FIG. 3 is a view similar to FIG. 2 but showing the cartridge for support thereof and the bolt energized for under the base of the leading cartridge 22, the base is counterrecoil ?ight; raised so as to project upwardly into the path of bolt 14 to assure engagement thereby during displacement FIG. 4 is a view taken along line 4—'4 of FIG. 3; and FIG. 5 is an enlarged view of the butter-retainer. 60 from the recoil position. Buffer-retainer 40 is actuated rearwardly, against the Shown in the ?gures is a ?rearm receiver 12 in which a cylindrical bolt 14 is slidingly received by a channel bias of spring 38, by the contact of a radial ?ange 56 on bolt 14 with the front side of plate 44 during the 16 for longitudinal reciprocation in recoil and counter recoil strokes to and from a recoil position. Receiver recoil strokes of bolt 14. Flange 56 is disposed adja 12 is provided with a vertically disposed well 18 which 65 cent the front end of bolt 14 so that tines 50 extend forwardly therebcyond when the ?ange and plate '44 are extends therethrough to channel 16 and which is adapted to receive a cartridge magazine 20. Magazine 20 is of in contact. The contact of ?ange 56 with plate 44 dur double-stacked type wherein a plurality of stored car ing recoil travel of bolt 14, which displaces bu?er-retainer tridges 22 are moved alternately and in contact relation 4t) rearwardly against the bias of spring 38, releases car ship from the two stacks to a central neck 24 for suc 70 tridge 22 engaged with the underside of tines 50. When cessive removal by bolt 14 during the counterrecoil released, such cartridge 22 is moved under the bias of strokes thereof. The remaining cartridges 22 in maga spring 26 into pickup position in neck 24. Moreover, 3,054,206 3 through the engagement of buffer-retainer 40 by bolt 14, the energy therein is partially absorbed by spring 38, before being stopped in recoil position by the contact of plate 44 with wall 34, to provide a buffer for the bolt. The stored energy in spring 38 energizes bolt 14 for the succeeding counterrecoil stroke thereof. Thus, when bolt 14 is in battery, the rear end of the 4 as to resiliently stop said bolt in the recoil position and energize said bolt for ?ight therefrom. 2. In a ?rearm, the combination including a receiver, a bolt disposed in the receiver so as to be energized for longitudinal reciprocation to and from a recoil position, a magazine arranged for moving cartridges therein succes sively and in contact relationship to a neck of said maga leading cartridge 22 in magazine 20 is in engagement zine in position for pickup by said bolt during displace sive to discharge forces. \Vhen bolt 14- is adjacent recoil position during the recoil stroke thereof, ?ange 56 con tacts plate 44 to provide a buffer for the bolt and retract tines 50 within chamber section 32 for release of the tridges for retention thereof in position for pickup by said bolt during displacement from the recoil position and ment thereof from the recoil position, a bulfer-retainer with the undersides of tines 50 so as to project radially upward therebetween but so as to be clear of ?ange 56, 10 device mounted for longitudinal reciprocation in the re ceiver adjacent said magazine, said buffer device including as shown in FIG. 1, when the bolt travels in recoil respon engaged cartridge 22. retainer means engageable with the pickup position car spring means disposed for biasing said retainer means into engagement with the pickup position cartridges, and a ?ange disposed on said bolt for engagement with said buf fer-retainer device during displacement of said bolt to the The released cartridge 22 is immediately biased up wardly into pickup position in neck 24 and the contact recoil position for actuating said retainer means so as to of plate 44 with wall 34 stops bolt 14 in the recoil posi tion thereof. Spring 26 must have sufficient resiliency 20 be displaceable into engagement with the pickup position cartridges and for transferring recoil energy from said bolt and the reciprocation of bulfer-retainer 40 with bolt 14 must be su?icient to assure that the released cartridge 22 will reach pickup position in neck 24 by the time that the front end of tines 50 are positioned, during counter recoil of the bolt, for engagement with the underside of such cartridge. The ramps 52 on the front ends of tines 50 assure extension thereof beneath the leading to said spring means to resiliently stop said bolt at the re coil position and energize said bolt for ?ight therefrom. 3. The combination as de?ned in claim 2 wherein said cartridge 22. Therefore, the leading cartridge 22 is positively positioned by tines 50 so that, when stop 46 retainer means includes a pair of tines laterally disposed so as to be engageable with the pickup position cartridges on opposite sides of an area of contact of the pickup posi tion cartridge with a succeeding cartridge in said maga zine and so as to permit limited radial displacement of the contacts the front end of slot 48 to stop the forward displacement of buffer-retainer 4t} and bolt 14 continues in counterrecoil relative thereto, the base of such car 4. The combination as de?ned in claim 2 wherein the succeeding cartridge therebetween when the pickup posi tion cartridge is removed from said magazine by said bolt. receiver is provided with a vertical well for receiving said tridge is isolated by tines 5t? from the in?uence of spring magazine, a chamber section extending rearwardly from 26 and supported for positive contact by the front end of the bolt. When the leading cartridge 22 in magazine 35 the top of said well to a vertically disposed wall and a bore extending longitudinally rearward therefrom; wherein said 20 is transferred therefrom by bolt 14, the succeeding buffer-retainer device includes a shaft slidingly disposed in cartridge in the magazine is pressed upwardly by spring said bore, an integral plate laterally disposed on the front 26 into engagement with the undersides of tines 50. end of said shaft so as to be slidingly received by said From the foregoing it is clearly apparent that there is chamber section and be contactable with said wall to stop provided herein a device which serves the dual purpose rearward displacement of said buifer-retainer device and of retaining a cartridge in a magazine in position for means for stopping the forward displacement thereof to positive contact by a reciprocating bolt and of bu??ng limit the longitudinal reciprocation of said buffer-retainer the recoil strokes thereof, which buffer-retainer device is device; wherein said retaining means includes a pair of simple and rugged in construction and positive in its tines extending integrally forward from said plate so that functions. 45 when the forward displacement of said buffer-retainer is Although a particular embodiment of the invention stopped by said stopping means said tines extend into said has been described in detail herein, it is evident that many magazine for engagement with the pickup position car variations may be devised within the spirit and scope tridge to support the cartridge for contact by said bolt dur thereof and the following claims are intended to include ing displacement from the recoil position and so that when 50 said plate is in contact with said wall said tines are re such variations. I claim: tracted from said magazine into said chamber section; 1. In a ?rearm, the combination including a receiver, wherein said spring means is disposed in said bore rear a bolt disposed in the receiver for longitudinal reciproca tion to and from a recoil position, a magazine arranged wardly of said shaft for biasing said buffer-retainer device for moving cartridges successively from a stored supply therein to a neck of said magazine and in position for pick up by said bolt during displacement thereof from the re on said bolt adjacent the front end thereof so that when said ?ange and said plate are in contact said tines extend coil position, and a device disposed in the receiver so as to forwardly; and wherein said ?ange is integrally disposed forwardly beyond said bolt to engage the pickup position cartridge before contact thereof by said bolt during ?ight thereof from the recoil position. be engageable with the pickup position cartridges for re 60 tention thereof in position for pickup by said bolt and so No references cited.