US2642688A - Magazine-conversion unit for firearms - Google Patents
Magazine-conversion unit for firearms Download PDFInfo
- Publication number
- US2642688A US2642688A US199431A US19943150A US2642688A US 2642688 A US2642688 A US 2642688A US 199431 A US199431 A US 199431A US 19943150 A US19943150 A US 19943150A US 2642688 A US2642688 A US 2642688A
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- Prior art keywords
- magazine
- unit
- conversion
- box
- cartridge
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- 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
- F41A9/61—Magazines
- F41A9/64—Magazines for unbelted ammunition
- F41A9/65—Box magazines having a cartridge follower
Definitions
- the present invention relates in general to firearms of the box-magazine type and more particularly to a box-magazine conversion-unit for adapting a box-magazine to a single-column cartridge-feed.
- An object of the invention is to provide a superior conversion-unit for box-magazines.
- a further object of the invention is to provide a box-magazine conversion-unit of simple, durable and economical construction adapted to be readily attached to and detached from the hinged floor plate of a box-magazine.
- a still further object of the invention is to provide a box-magazine conversion-unit with fastening-means by which the conversion-unit may be readily attached to or detached from the hinged floor plate of a box-magazine in the field without the use of tools or special equipment.
- a still further object of the invention is to provide a box-magazine conversion-unit having fastening-means whereby the conversion-unit may be readily attached to and detached from ⁇ the hinged floor plate of a box-magazine to adapt the latter to single-column cartridge-feed.
- Fig. 1 is a right-side elevation of a bolt-action rearm of the box-magazine type with which the superior conversion-unit of the invention is adapted to be used;
- Fig. 2 is a fragmentary enlarged right-side elevation of the firearm of Fig. 1, partially broken away to show the action in its closed position and the assembly of the conversion-unit on the hinged oor plate, the latter being shown by broken lines in its unlatched position;
- Fig. 3 is a transverse section of the rearm on line 3-3 of Fig. 2;
- Fig. 4 is an enlarged fragmentary transverse section on line 4-4 of Fig. 2;
- Fig. 5 is an enlarged fragmentary right-side elevation of the firearm of Fig. 1 partly broken away to show the action open;
- Fig. 6 is a transverse section on line 6-6 of Fig. I5
- Fig. 7 is a right-side elevation of the improved box-magazine conversion-unit of this invention, with a portion of the lower side wall broken away;
- Fig. 8 is a bottom plan view of the conversionunit of Fig. '7 and Fig. 9 is a top plan View of the hinged oor plate of the firearm to which the conversionunit is adapted to be attached.
- box-magazine conversion-unit is shown as used in the box-magazine of a bolt-action type of firearm. It will be appreciated, however, that 1 the particular firearm illustrated herein is merely for the purpose of describing one application of the invention and that the latter is applicable to other firearms of the type having a boxmagazine and a hinged iloor plate.
- the bolt-action rearm embodies, in the main, a receiver indicated generally at II) and having threadedly secured to its forward end a barrel I3, the forward end of the receiver being provided with lockingshoulders I 4 for coaction with the locking-lugs I5 on the forward end of an upturn-and-pullback breech-bolt I6.
- the latter is adapted to reciprocate in the central bore I 'I of the receiver which has a loading-and-ejection opening I8 in the top wall thereof intermediate its opposite ends.
- the locking-lugs I5 of the bolt I6 are adapted to slide in guide-grooves of the receiver and to be rotated through a quarter turn when the bolt is in its extreme forward position, as shown in Fig. 2, to coact with the locking-shoulders I4 of the receiver to lock the bolt in breech-closing position.
- the receiver-and-barrel assembly is mounted on a solid stock I9 and secured thereto by assembling-screws ZIJ, the stock being provided with a vertical box-magazine receiving-aperture 2I which extends therethrough from its top side to its bottom side and is substantially in alignment with the loading-and-ejection opening I8 of the receiver.
- of the stock is adapted to be closed by a floor plate 22.
- the latter is hinged at its forward end to the underside of the stock by means of a hinge-strap 23 which is seated in a recess in the underside of the stock and secured therein by one of the aforesaid assembling-screws 2U.
- the rear end of the hinged floor plate is adapted to be engaged by a spring-loaded latch 24 which serves to hold the oor plate in its normal closed position, as shown in Fig. 2.
- a top-loading box-magazine body comprising a substantially-rectangular sheet-metal sleeve-like member 25 having 3 side walls and end walls arranged to engage securely against corresponding walls of the boxmagazine receiving-aperture 2
- the bottom of the box-magazine body 25 is normally closed by the hinged oor plate 22.
- the box-magazine is of the topp-leading type adaptedy to accommodate a "double ⁇ column of staggered cartridges for feeding the "cartridges successively into the breech of the barrel form ⁇ chambering by the breech-bolt, the feed-means' of the box-magazine body including acartridge-v follower (not shown) and a follower-spring126. for supporting and actuating the follower.
- the width of the respective apertures 36, 31 and 38 being substantially the same and slightly wider than the lower leaf 30 of the follower-spring 26 as and for the purpose hereinafter described.
- the width of the respective apertures 36, 31 and 38 being substantially the same and slightly wider than the lower leaf 30 of the follower-spring 26 as and for the purpose hereinafter described.
- the aperture 35 is relatively narrow as compared to the apertures 36, 31 and 38 and is formed forl the purpose of providinlg a down-turned lip 33 (
- the aforesaidaprture'36iand' the 'aperture 38 in the bottdm'wall of the conversion-'unit constitute cle'a aiicereces'sesfor accommodating th'fc'ylinii driaf'erilarenients'of 'the' reverse" bends" of the lowermost leaf 3U and the next-succeeding upper leaf "4l” vof the 'follower-spring a's illustrated: in Figs.
- Each longitudiinalbend 42 thus'serves asfa'vfulcrum" for 'lateral displacement of tliieiipl'ier halves of the sidewalls 34-34 of the conversion-unit when loading car-I tridges into theA top'ther'eof lin the 'manner characteristic'bf magazinesfoff-the top-loading type.
- iAs shownl esr' 'ecially"wellA Fig'.
- each side wall 34 of the'conversionunit is "provided iwith a "substantially-verticalf slot" d3 intermediate its'opposite ends', which Idivides the upper "'half 'of 'each”"respe'ctive side wall into a rear"portion and frntpotion," the rear 'portions ofthe side wallsoffthe*'conversionunit being symmetrical with ⁇ respect to the Verticalaxis' of' the conversioniunittand inclined 'inwardly so'that the transverse distance betw'eeen'" the upper angededges 4'4-44 1 of: the rear portions of the side walls 34-34 is slightly'less'thanitliediameter of a' cartridge.
- the upper edges 45-45 of the forward portions of the side walls 34--34 of the conversionunit are preferably cut down, as indicated especially well in Fig. 7, so as to increase the lateral spacing of the upper edges thereof so that these upper edges of the conversion-unit will permit a cartridge to pass upwardly freely therebetween whereby cartridges may be elevated by the follower and follower-spring assembly of the conversion-unit into position for chambering by the breech-bolt, as hereinafter described.
- the follower 46 of the conversion-unit comprises a strip of relatively-stiff sheet-metal stock, the opposite longitudinal edges of which are turned under, as shown especially well in Fig. 6, to provide stiffeningmeans, the follower having preferably a slight convex curvature in cross section.
- the turnedunder edges of the follower also include a pair of inwardly-projecting spring-retaining ⁇ lips 41-41 with which the free end of the uppermost leaf 48 of the follower-spring is adapted to be engaged for detachably securing the follower thereto.
- each side wall of the box-magazine body 25 is provided adjacent its forward end with an inwardly-struck substantially-vertical cartridge-guide rib
- each side wall 34 of the conversion-unit is provided in its forward portion with a clearance-aperture 49 for accommodating the cartridge-guide ribs of the box-magazine body when the conversion-unit is assembled therein.
- the maximum internal width of the conversion-unit is less than the Width of the box-magazine body 25.
- the upper half of each side wall of the conversion-unit is inclined inwardly, as hereinabove described, so that the resilient lips 44--44 of the conversion-unit will be spaced apart less than the diameter of a cartridge. Consequently, the conversion-unit holds one less cartridge than a double-column-feed type of box-magazine, the cartridges being arranged in the conversion-unit in a semi-staggered relationship with the uppermost cartridge held by the resilient lips 44--44 substantially in axial alignment with the bore of the barrel for achieving single-column feeding.
- the operation of the conversion-unit of the firearm is as follows: Let it be assumed that the shooter wishes to convert the double-column cartridge-feed. type of box-magazine in the rearm to single-column cartridge-feed so as to prevent malfunctioning of the firearm when using soft-nosed bullets.
- the shooter unlatches the hinged floor plate 22 of the box-magazine and allows it to swing downwardly into a substantially-vertical position, whereupon he disengages the leaf 3D of the follower-spring from the spring-retaining lips of the floor plate. He thereupon disengages the double-column-feed type of follower from the upper leaf 48 of the spring 26 and attaches to the latter the sheetmetal follower 46 of the conversion-unit 32.
- the shooter then swings the hinged floor plate up into its normal latched position thereby moving the conversion-unit up into the box-magazine body 25.
- the firearm is now converted for single-column cartridge-feed so that cartridges held in the conversion-unit of the boxmagazine will be fed therefrom in substantiallyaxial alignment with the bore of the barrel.
- the cartridge When the bolt has advanced sufficiently to bring the rim of the cartridge opposite the vertical slots 43-43 in the walls 34-34 of the conversion-unit, the cartridge is released from the resilient cartridge hold-down lips 44-44 of the conversion-unit and is thereupon moved upwardly by the force of the compressed follower-spring into engagement with the extractor on the face of the bolt, the upward and forward movement of the cartridge being concurrent with the forward movement of the breech-bolt, whereby the cartridge is chambered in the bore of the barrel.
- the bolt-operating handle is then swung down to engage the locking-lugs I5 of the bolt with the locking-shoulders I4 of the barrel for locking the bolt in breech-closing position preparatory to ring the piece.
- the action is opened by the upswing and pullback of the bolt-handle, whereupon the fired cartridge is extracted from the barrel by the rearward movement of the breech bolt and pulled rearwardly opposite the loading-and ejection opening I8 of the receiver, from which the fired cartridge is ejected in the usual manner.
- the next-succeeding cartridge in the conversion-unit of the magazine is moved upwardly by the follower and follower-spring assembly to project into the path of the front face of the breech-bolt, in which position it is resiliently held by the hold-down lips 44-44 of ⁇ the conversion-unit.
- the firearm is again ready for loading a new cartridge into the chamber of the barrel.
- a box-magazine firearm the combination with a box-magazine body of the doublecolumn cartridge-feed type having a hinged floor plate for closing the lower end of said box-magazine body: of a conversion-unit fitting snugly within said box-magazine body for converting said .$99111 '.bneureleaay anehered to. said-hinged $1991@ ,91am eed; releaeably interlecnee with.. said @Qrlvesien 1111.119 fer detaelzlable abtachmeml 9i-.bhe
- plat-.eY is nleYded. with. a. reess and snrinewetainmgflips eesiienegl; on genesis-.e sidesof said recess whieh DQjGnWaxdly eWardS.. eeen other ⁇ to.. oyerle the bett m. er.
- cartridge-feed said ⁇ cambridge, holder: being releasably ⁇ nterlocked with :saidileor plate. and said.springend held by thezlatterf in interlock with said oor platev to loe,l carried thereby immy and from; said magazine.
Description
June 23, y1953 M, M, JQHNSON'JR 2,642,688
msnm-CONVERSION UNIT PoR- FIREARMS Filed sec. e, 195o wlsneets-she'erl June 23, 1953 11M. MfJoHNoN, JR: 2,642,688r
MAGAZINE-CONVERSION I mn F012.FIREARMS Filed Dec. e. 195o a V2 sheets-sheet 2 Z? zg 30 1113128 zu 6 37 f/w H5 Patented `une 23, 1953 UNITED STATES asias TENT OFFICE MAGAZINE-CONVERSION UNIT FOR FIREARMS Application December 6, 1950, Serial No. 199,431
(Cl. A12- 50) 4 Claims.
The present invention relates in general to firearms of the box-magazine type and more particularly to a box-magazine conversion-unit for adapting a box-magazine to a single-column cartridge-feed.
An object of the invention is to provide a superior conversion-unit for box-magazines.
A further object of the invention is to provide a box-magazine conversion-unit of simple, durable and economical construction adapted to be readily attached to and detached from the hinged floor plate of a box-magazine.
A still further object of the invention is to provide a box-magazine conversion-unit with fastening-means by which the conversion-unit may be readily attached to or detached from the hinged floor plate of a box-magazine in the field without the use of tools or special equipment.
A still further object of the invention is to provide a box-magazine conversion-unit having fastening-means whereby the conversion-unit may be readily attached to and detached from` the hinged floor plate of a box-magazine to adapt the latter to single-column cartridge-feed.
Other objects and advantages will appear to those skilled in the art from the following, considered in conjunction with the accompanying drawings.
In the accompanying drawings, in which certain modes of carrying out the present invention are shown for illustrative purposes:
Fig. 1 is a right-side elevation of a bolt-action rearm of the box-magazine type with which the superior conversion-unit of the invention is adapted to be used;
Fig. 2 is a fragmentary enlarged right-side elevation of the firearm of Fig. 1, partially broken away to show the action in its closed position and the assembly of the conversion-unit on the hinged oor plate, the latter being shown by broken lines in its unlatched position;
Fig. 3 is a transverse section of the rearm on line 3-3 of Fig. 2;
Fig. 4 is an enlarged fragmentary transverse section on line 4-4 of Fig. 2;
Fig. 5 is an enlarged fragmentary right-side elevation of the firearm of Fig. 1 partly broken away to show the action open;
Fig. 6 is a transverse section on line 6-6 of Fig. I5
Fig. 7 is a right-side elevation of the improved box-magazine conversion-unit of this invention, with a portion of the lower side wall broken away;
Fig. 8 is a bottom plan view of the conversionunit of Fig. '7 and Fig. 9 is a top plan View of the hinged oor plate of the firearm to which the conversionunit is adapted to be attached.
For the purpose of describing the invention, the box-magazine conversion-unit is shown as used in the box-magazine of a bolt-action type of firearm. It will be appreciated, however, that 1 the particular firearm illustrated herein is merely for the purpose of describing one application of the invention and that the latter is applicable to other firearms of the type having a boxmagazine and a hinged iloor plate.
Referring especially to Fig. 2, the bolt-action rearm embodies, in the main, a receiver indicated generally at II) and having threadedly secured to its forward end a barrel I3, the forward end of the receiver being provided with lockingshoulders I 4 for coaction with the locking-lugs I5 on the forward end of an upturn-and-pullback breech-bolt I6. The latter is adapted to reciprocate in the central bore I 'I of the receiver which has a loading-and-ejection opening I8 in the top wall thereof intermediate its opposite ends. The locking-lugs I5 of the bolt I6 are adapted to slide in guide-grooves of the receiver and to be rotated through a quarter turn when the bolt is in its extreme forward position, as shown in Fig. 2, to coact with the locking-shoulders I4 of the receiver to lock the bolt in breech-closing position.
The receiver-and-barrel assembly is mounted on a solid stock I9 and secured thereto by assembling-screws ZIJ, the stock being provided with a vertical box-magazine receiving-aperture 2I which extends therethrough from its top side to its bottom side and is substantially in alignment with the loading-and-ejection opening I8 of the receiver. The lower open end of the boxmagazine receiving-aperture 2| of the stock is adapted to be closed by a floor plate 22. The latter is hinged at its forward end to the underside of the stock by means of a hinge-strap 23 which is seated in a recess in the underside of the stock and secured therein by one of the aforesaid assembling-screws 2U. The rear end of the hinged floor plate is adapted to be engaged by a spring-loaded latch 24 which serves to hold the oor plate in its normal closed position, as shown in Fig. 2.
Mounted in the box-magazine receiving-aperture 2i of the stock is a top-loading box-magazine body comprising a substantially-rectangular sheet-metal sleeve-like member 25 having 3 side walls and end walls arranged to engage securely against corresponding walls of the boxmagazine receiving-aperture 2|, as indicated in the drawings. The bottom of the box-magazine body 25 is normally closed by the hinged oor plate 22.
The box-magazine is of the topp-leading type adaptedy to accommodate a "double` column of staggered cartridges for feeding the "cartridges successively into the breech of the barrel form` chambering by the breech-bolt, the feed-means' of the box-magazine body including acartridge-v follower (not shown) and a follower-spring126. for supporting and actuating the follower. The
lower end of the follower-'spring 2li is'i'adaptd" to be detachably secured to"the"`hing"'e'd floor plate 22, and to this end the upper surfacef"th"e' hinged floor plate 22 is providedfwitharelatively shallow substantially-rectangular recess 21 extending longitudinally thereof, as shown e"s"pec'il ally well in Fig. 9, and having a front end-wall 2'81" andfrear end-wall `2 9 i the *overl-"all i lerv'igtlfV of the recess 2 1 being somewhat 'g'ater thaiiltlie' length-off-th'e lowermstea'f,Snf the followerspirg'.- Y l'The iwiith"v `f"the recess "21 corresponds substantially to the width oftlieaforesaidleaf 3U 'ofthe fllowerlspririg', wherebyfithe f lat'tefis afdapted to seatf'infthefrecess '2 Tfinfthef upper fcefofl-irie, hinged nominate:- #Fer-'deeper i 'the lowerleafft'efll.'off' the follower-'spring main,'"" "sheetmetal bottom wall Y3ft' andtwoupf standing laterallyespaced"sheet=metal"sidewalls 30W-#34,V forming" al holder fora* single' 'coluinn` oitca'rtridgesi vThe bottoni wallitof th'e'on-fi versioniuriitwis considerably narrowerLthanVf-thef box-magazine body 25., as"shownespecially-well* in Figi -'6,' -and is provided' with-'f a series-'ofsubstantially-rectangular Vapertures 35,733; 3l4 and generallybythe numeral 32 comprifsesfifrith' *ff 3 3` respectively spaced longitudinally tlfielere'go-f* asv 7,45" iness""fr"functi'onin'g`in the prescribedma Y.
i shown in Fig. 8, the width of the respective apertures 36, 31 and 38 being substantially the same and slightly wider than the lower leaf 30 of the follower-spring 26 as and for the purpose hereinafter described. The aperture 35 is relatively narrow as compared to the apertures 36, 31 and 38 and is formed forl the purpose of providinlg a down-turned lip 33 (fsee' Ei'g`.""7') which, as "s'hownespe'cially wellin' Fig. 5,`is" adapted to Y engage against the rear end wall 29 of the recess 21' in the hinged floor plate 22 to positively hold the"conversion=unit 32 against rearward displacement relative thereto when assembled thereon, as hereinafter described. Similarly, the
'aperture 'SSinitheforward end of the bottom wall 3 3 of the conversion-unit has a down-turned lip MVwhieli is"A adapted to engage against the frontmen'd "wal1r28jof the clearance-recess 21 of the hinged floor plate to positively prevent the conversion-unit from moving forwardly relative to the iioor plate when"as sembled thereon. The aforesaidaprture'36iand' the 'aperture 38 in the bottdm'wall of the conversion-'unit constitute cle'a aiicereces'sesfor accommodating th'fc'ylinii driaf'erilarenients'of 'the' reverse" bends" of the lowermost leaf 3U and the next-succeeding upper leaf "4l" vof the 'follower-spring a's illustrated: in Figs. 5`f"and 'j'so as`"toinsure'suii"icient-spacewithe in:4 vthe c"oni'/er'sio'n'''unit'l for 'accommodating at l'asttliree ct'trtridges'l"`r 1""lfh'e'"afiiesaidA aperture 37 in the bottom wall 33 offtheconversibn-unit is provided fo''permiti ting the free"end"off'thedowermost l'efaf 3ll^`ofv the ffollowerspring to project ltherethrough below f tueYV undersidefofrtnebpttem wants-brine `von: versioi'l-'imitfor detachable engagementin the IezeSsHZ'I Of'th'hged floor "plate,land;v in: par: ticiilai for'engagem'ent beneatli''tlie overhanging' upset-'3ith'ere'of; 'in' themannershown especially well in Figs. 2 and 5. Referring:especially-'to Figs. 6 and '7, it will be seen that thelower halfk ofz'eachside wa'l1341 of f the *conversion-unit isbent outwardly, `-while the 'pper'half "of each side "wall isbe'n'tV inwardly; the ber'id'at'the' juncture "of the' upper and' 'lower halves'of eacnside' `wall extendinglongitudinally ofthe conversion-'unit arranged'to engage'against the inner surface of thecorrespondingv iside# wallof"'th'e"`box=magazine 'body2 5 'when' the conver sion-unit is assembled therein. Each longitudiinalbend 42 thus'serves asfa'vfulcrum" for 'lateral displacement of tliieiipl'ier halves of the sidewalls 34-34 of the conversion-unit when loading car-I tridges into theA top'ther'eof lin the 'manner characteristic'bf magazinesfoff-the top-loading type. iAs" shownl esr' 'ecially"wellA Fig'. '7 the`- upper half of each side wall 34 of the'conversionunit is "provided iwith a "substantially-verticalf slot" d3 intermediate its'opposite ends', which Idivides the upper "'half 'of 'each""respe'ctive side wall into a rear"portion and frntpotion," the rear 'portions ofthe side wallsoffthe*'conversionunit being symmetrical with` respect to the Verticalaxis' of' the conversioniunittand inclined 'inwardly so'that the transverse distance betw'eeen'" the upper angededges 4'4-44 1 of: the rear portions of the side walls 34-34 is slightly'less'thanitliediameter of a' cartridge. r`TheV` upper Aflaifiged'edgesY Mii-"T114 of the lconifersion-uit thus serve resilient' lips for holding the cartridgesintheonversionunit f down Yagair'ist theupwardly'direote'd 'force' of the The upper edges 45-45 of the forward portions of the side walls 34--34 of the conversionunit are preferably cut down, as indicated especially well in Fig. 7, so as to increase the lateral spacing of the upper edges thereof so that these upper edges of the conversion-unit will permit a cartridge to pass upwardly freely therebetween whereby cartridges may be elevated by the follower and follower-spring assembly of the conversion-unit into position for chambering by the breech-bolt, as hereinafter described. In this connection, the follower 46 of the conversion-unit comprises a strip of relatively-stiff sheet-metal stock, the opposite longitudinal edges of which are turned under, as shown especially well in Fig. 6, to provide stiffeningmeans, the follower having preferably a slight convex curvature in cross section. The turnedunder edges of the follower also include a pair of inwardly-projecting spring-retaining `lips 41-41 with which the free end of the uppermost leaf 48 of the follower-spring is adapted to be engaged for detachably securing the follower thereto.
Inasmuch as each side wall of the box-magazine body 25 is provided adjacent its forward end with an inwardly-struck substantially-vertical cartridge-guide rib, each side wall 34 of the conversion-unit is provided in its forward portion with a clearance-aperture 49 for accommodating the cartridge-guide ribs of the box-magazine body when the conversion-unit is assembled therein.
As shown in Fig. 6, the maximum internal width of the conversion-unit is less than the Width of the box-magazine body 25. Moreover, the upper half of each side wall of the conversion-unit is inclined inwardly, as hereinabove described, so that the resilient lips 44--44 of the conversion-unit will be spaced apart less than the diameter of a cartridge. Consequently, the conversion-unit holds one less cartridge than a double-column-feed type of box-magazine, the cartridges being arranged in the conversion-unit in a semi-staggered relationship with the uppermost cartridge held by the resilient lips 44--44 substantially in axial alignment with the bore of the barrel for achieving single-column feeding.
The operation of the conversion-unit of the firearm is as follows: Let it be assumed that the shooter wishes to convert the double-column cartridge-feed. type of box-magazine in the rearm to single-column cartridge-feed so as to prevent malfunctioning of the firearm when using soft-nosed bullets. The shooter unlatches the hinged floor plate 22 of the box-magazine and allows it to swing downwardly into a substantially-vertical position, whereupon he disengages the leaf 3D of the follower-spring from the spring-retaining lips of the floor plate. He thereupon disengages the double-column-feed type of follower from the upper leaf 48 of the spring 26 and attaches to the latter the sheetmetal follower 46 of the conversion-unit 32. He then slips the single-column-feed follower 46 and the follower-spring 26 between the side walls 34--34 of the conversion-unit with the lower leaf 30 of the follower-spring projecting through the aperture 31 in the bottom wall 33 of the conversion-unit. The completely-assembled conversion-unit is then mounted on the hinged floor plate 22 by engaging the free end of the lower leaf 30 of the follower-spring beneath the springretaining lips 3l-3l of the floor plate, whereby the conversion-unit 'is detachably secured thereon, the unit being positively held against movement longitudinally relative thereto by engagement of the respective lips 39 and 40 with the corresponding end Walls of the recess 21 in the floor plate. The shooter then swings the hinged floor plate up into its normal latched position thereby moving the conversion-unit up into the box-magazine body 25. The firearm is now converted for single-column cartridge-feed so that cartridges held in the conversion-unit of the boxmagazine will be fed therefrom in substantiallyaxial alignment with the bore of the barrel.
Assuming cartridges have been loaded through the top of the conversion-unit, then upon moving the breech-bolt forwardly from its rearmost position, the forward face of the bolt will engage the upper edge of the uppermost cartridge in the conversion-unit of the magazine in the manner shown in Fig. 5, and advance the uppermost cartridge forwardly therein whereby the nose of the cartridge is brought into engagement with the mouth of the breech and is guided upwardly by the sloping surface thereof into the bore of the barrel. When the bolt has advanced sufficiently to bring the rim of the cartridge opposite the vertical slots 43-43 in the walls 34-34 of the conversion-unit, the cartridge is released from the resilient cartridge hold-down lips 44-44 of the conversion-unit and is thereupon moved upwardly by the force of the compressed follower-spring into engagement with the extractor on the face of the bolt, the upward and forward movement of the cartridge being concurrent with the forward movement of the breech-bolt, whereby the cartridge is chambered in the bore of the barrel. The bolt-operating handle is then swung down to engage the locking-lugs I5 of the bolt with the locking-shoulders I4 of the barrel for locking the bolt in breech-closing position preparatory to ring the piece. After firing the cartridge in the barrel, the action is opened by the upswing and pullback of the bolt-handle, whereupon the fired cartridge is extracted from the barrel by the rearward movement of the breech bolt and pulled rearwardly opposite the loading-and ejection opening I8 of the receiver, from which the fired cartridge is ejected in the usual manner. At the end of the rearward excursion of the breech-bolt, the next-succeeding cartridge in the conversion-unit of the magazine is moved upwardly by the follower and follower-spring assembly to project into the path of the front face of the breech-bolt, in which position it is resiliently held by the hold-down lips 44-44 of `the conversion-unit. The firearm is again ready for loading a new cartridge into the chamber of the barrel.
The invention may be carried out in other specific ways than those herein set forth without departing from the spirit and essential characteristics of the invention, and the present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, and all changes coming within the meaning and equivalency range of the appended claims are intended to be embraced therein.
I claim:
1. In a box-magazine firearm, the combination with a box-magazine body of the doublecolumn cartridge-feed type having a hinged floor plate for closing the lower end of said box-magazine body: of a conversion-unit fitting snugly within said box-magazine body for converting said .$99111 '.bneureleaay anehered to. said-hinged $1991@ ,91am eed; releaeably interlecnee with.. said @Qrlvesien 1111.119 fer detaelzlable abtachmeml 9i-.bhe
b9 Said. fleer plate.,
a.. bex-magazine nr-earm .1., Wheein sacl- 119er: plat-.eY is nleYded. with. a. reess and snrinewetainmgflips eesiienegl; on genesis-.e sidesof said recess whieh DQjGnWaxdly eWardS.. eeen other` to.. oyerle the bett m. er. sai@4 recess, one end ofsow`r folV mg being detahably anchqged to said o e 121,843.6 'Sliding' engagement under said .9,..-rlv-l6i 19g HRS; to. fratonally. hold; that epd O.`f,saigil follewerespring. against the bottom ofthe recess Qffsaid, 1.10.01? plate.
3. .'-Ijhee @Qmbinaton in a bex=magazine rearm as.; Qned in. elaim 2, vszhereinV sadconversion unit epmpses. a. lcnagafagme having-a bottomowall ang: gpstandng. side walls connected wsad hot-JA tem Wall; said. bettom .wellbeing aperturedfand Solid' free end ofy said followerespringprojecting therethrough for engagement with said springretail-gne lips.
4e Ina'rearm. oi the converted. box-magazine type, .the combination with. a.A m0untedbox-maga Zine of ,the deuble-.eolumn cartridgeffeed type, a ,hngedveox plate to..c1ose. the bottom of .said magazine. and a. .cartridge follower spring releasablyqlanhered. .teisaidz floer. plate, of a carbridge helderinsertable insana` magazine for con- Yertng Lthe latter tQ..s ing1e.-co1umn. cartridge-feed, said` cambridge, holder: being releasably` nterlocked with :saidileor plate. and said.springend held by thezlatterf in interlock with said oor platev to loe,l carried thereby immy and from; said magazine.
' MELVIN M JOHNSON, JR.
.Reienencee Qited inthe-file ofmhis. paemv UNITED STATES PATENTS Number Name. Date.
.5218.69 .Mauser oet. 23,J 18.94 1,306,912. Jbelson -M June. 175, 1919 145,512,457.. Sept. 8,1925 1.999,61!) Feb.. 21, 1.93.3 .Zofiflsza Harvey. Jan. 19,v 1948
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US199431A US2642688A (en) | 1950-12-06 | 1950-12-06 | Magazine-conversion unit for firearms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US199431A US2642688A (en) | 1950-12-06 | 1950-12-06 | Magazine-conversion unit for firearms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2642688A true US2642688A (en) | 1953-06-23 |
Family
ID=22737465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US199431A Expired - Lifetime US2642688A (en) | 1950-12-06 | 1950-12-06 | Magazine-conversion unit for firearms |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2642688A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2931120A (en) * | 1955-08-17 | 1960-04-05 | Kolin George | Automatic firearm with a spare magazine holder |
| US3019542A (en) * | 1958-06-13 | 1962-02-06 | Atlee G Manthos | Cartridge magazine conversion |
| US3509654A (en) * | 1966-12-08 | 1970-05-05 | Messrs Mauser Werke Ag | Rifle magazine having transversely acting spring means therein |
| US6367188B1 (en) * | 2000-09-05 | 2002-04-09 | Eugene T. Vargas Revocable Trust | Firearm with detachable magazine |
| US20100269388A1 (en) * | 2007-03-08 | 2010-10-28 | Browning | Firearm magazine |
| US20100281731A1 (en) * | 2007-08-30 | 2010-11-11 | Ra Brands, L.L.C | Pivoting, non-detachable magazine |
| US8418390B1 (en) * | 2010-01-05 | 2013-04-16 | Robert Wright | Magazine feed attachment for shotgun |
| US20140223790A1 (en) * | 2013-01-25 | 2014-08-14 | Sig Sauer, Inc. | Non-detachable magazine |
| US20160076840A1 (en) * | 2014-09-15 | 2016-03-17 | L&O Hunting Group GmbH | Removable magazine for a rifle |
| EP3066408B1 (en) | 2013-11-07 | 2018-09-26 | BAE Systems Bofors AB | Management system and method for sorting mixed ammunition types |
| US10151546B2 (en) | 2015-04-08 | 2018-12-11 | Ra Brands, L.L.C. | Shotgun with magazine loading system |
| US10371475B2 (en) | 2016-09-21 | 2019-08-06 | Browning | Firearm magazine |
| US10921075B2 (en) | 2018-07-09 | 2021-02-16 | Sturm, Ruger & Company, Inc. | Magazine for firearm |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US527869A (en) * | 1894-10-23 | mauser | ||
| US1306972A (en) * | 1919-06-17 | Cartridge-magazine for firearms | ||
| US1552457A (en) * | 1919-05-17 | 1925-09-08 | Marlin Firearms Corp | Firearm |
| US1898670A (en) * | 1932-04-15 | 1933-02-21 | Winchester Repeating Arms Co | Manually-operated bolt-action firearm |
| US2434269A (en) * | 1945-03-21 | 1948-01-13 | Earle M Harvey | Firearm magazine |
-
1950
- 1950-12-06 US US199431A patent/US2642688A/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US527869A (en) * | 1894-10-23 | mauser | ||
| US1306972A (en) * | 1919-06-17 | Cartridge-magazine for firearms | ||
| US1552457A (en) * | 1919-05-17 | 1925-09-08 | Marlin Firearms Corp | Firearm |
| US1898670A (en) * | 1932-04-15 | 1933-02-21 | Winchester Repeating Arms Co | Manually-operated bolt-action firearm |
| US2434269A (en) * | 1945-03-21 | 1948-01-13 | Earle M Harvey | Firearm magazine |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2931120A (en) * | 1955-08-17 | 1960-04-05 | Kolin George | Automatic firearm with a spare magazine holder |
| US3019542A (en) * | 1958-06-13 | 1962-02-06 | Atlee G Manthos | Cartridge magazine conversion |
| US3509654A (en) * | 1966-12-08 | 1970-05-05 | Messrs Mauser Werke Ag | Rifle magazine having transversely acting spring means therein |
| US6367188B1 (en) * | 2000-09-05 | 2002-04-09 | Eugene T. Vargas Revocable Trust | Firearm with detachable magazine |
| US8484875B2 (en) | 2007-03-08 | 2013-07-16 | Browning | Firearm magazine |
| US20100269388A1 (en) * | 2007-03-08 | 2010-10-28 | Browning | Firearm magazine |
| US8745912B2 (en) | 2007-03-08 | 2014-06-10 | Browning | Firearm magazine |
| US8156675B2 (en) * | 2007-03-08 | 2012-04-17 | Browning | Firearm magazine |
| US20100281731A1 (en) * | 2007-08-30 | 2010-11-11 | Ra Brands, L.L.C | Pivoting, non-detachable magazine |
| US7941955B2 (en) * | 2007-08-30 | 2011-05-17 | Ra Brands, L.L.C. | Pivoting, non-detachable magazine |
| US8418390B1 (en) * | 2010-01-05 | 2013-04-16 | Robert Wright | Magazine feed attachment for shotgun |
| US20140223790A1 (en) * | 2013-01-25 | 2014-08-14 | Sig Sauer, Inc. | Non-detachable magazine |
| US9212858B2 (en) * | 2013-01-25 | 2015-12-15 | Sig Sauer, Inc. | Non-detachable magazine |
| EP3066408B1 (en) | 2013-11-07 | 2018-09-26 | BAE Systems Bofors AB | Management system and method for sorting mixed ammunition types |
| US9618285B2 (en) * | 2014-09-15 | 2017-04-11 | L&O Hunting Group GmbH | Removable magazine for a rifle |
| US20160076840A1 (en) * | 2014-09-15 | 2016-03-17 | L&O Hunting Group GmbH | Removable magazine for a rifle |
| US10151546B2 (en) | 2015-04-08 | 2018-12-11 | Ra Brands, L.L.C. | Shotgun with magazine loading system |
| US10670357B2 (en) | 2015-04-08 | 2020-06-02 | R A Brands L.L.C. | Shotgun with magazine loading system |
| US10371475B2 (en) | 2016-09-21 | 2019-08-06 | Browning | Firearm magazine |
| US10921078B2 (en) | 2016-09-21 | 2021-02-16 | Browning | Firearm having a delay mechanism |
| US11614292B2 (en) | 2016-09-21 | 2023-03-28 | Browning | Detachable firearm receiver |
| US10921075B2 (en) | 2018-07-09 | 2021-02-16 | Sturm, Ruger & Company, Inc. | Magazine for firearm |
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