US643984A - Magazine bolt-gun. - Google Patents

Magazine bolt-gun. Download PDF

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Publication number
US643984A
US643984A US1897664364A US643984A US 643984 A US643984 A US 643984A US 1897664364 A US1897664364 A US 1897664364A US 643984 A US643984 A US 643984A
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Prior art keywords
bolt
sleeve
breech
receiver
extractor
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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
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Inventor
Charles H A F L Ross
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Charles H A F L Ross
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41AFUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A3/00Breech mechanisms, e.g. locks
    • F41A3/12Bolt action, i.e. the main breech opening movement being parallel to the barrel axis
    • F41A3/14Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively
    • F41A3/32Rigid bolt locks, i.e. having locking elements rigidly mounted on the bolt or bolt handle and on the barrel or breech-housing respectively the bolt being rocked about a notional axis transverse to the barrel axis

Description

N0. 643,984. Ea'en'sd Feb. 20, |9.

C. H. F. L. RGSS.-

'MAGAZINE BLT GUN.

(Application led Dec. Q9, 1697.

.7. Sheets-Sheet' l.

(Na Mode.)

Witne 5 5 a 5;

@MM5 @Magg im@ L RGSS:

(No Model.)

Witnesses; l

Patented Feb. 2G, i900.

C. H. A. F. L. RUSS.

MAGAZINE BLT GUN.

(Application led Dec. 29. 1897.

2 sheets-sheet 24 Inventor, harles H-FL. R o s s Ciiiiiitll i A. F. L. ROSS, Oi? BALNAGOVVAN CASTLE, ROSS COUNTY,

SCOTLAND.

VlIGAZI N E BO LT=G U N.

srncrsrcarron' forming part of Leners restent no. ceases, dates rebma'ryeo, ieoo. Application filed December 29,1897. Serial hln. 664.384. (No model.)

To @ZZ whom it may concern.-

Beit known that .'1CHARLES li. A. F. L.

` Ross, haronet, asubject of the Queen of Great Britain, andaresiilent of Balnagowan Castle, county of ess, Scotland, have invented certain new and useful improvements in Fire arrnsxof which the following is a specification.

invention is intended to be used particularly with magazine-guns and in general form is a straight-pull breech-action.

The parts of the breech-action are, first, a receiver, in.the forward end of which the gunnarrel is attached and along which the breech mechanism is-slidbaclrward and forward in opening and ciosing the 'breech to throw out cartridge-shells .hd reload, and, second, the breech. mechanism, which ismade np of a breech-bolt and extractor and a sleeve for rotating and thereby locking and unlocking the breech-bolt and sliding it and the extractor along the receiver. On the sleeve is also cover-piste or dust-guard for closing the' receiver when the breech mechanism is pushed heine.

The invention consists inthe general coinbination of these parts.

in the accompanying two sheets ci' drawings, which ferm a part of this specification,

Figure-1 is a plan view ci that part of the gun containinfr 'the brcechaction and showing the breech' closed, he receiver being in section along the line c ef Fig. 2 and the breech v inecnanisni'being partly broken away. Fig.

i is a perspective view oi the seine with the breech closed, the parts being partly broken away. Fig. 3 is a perspective view of the saine with the breech open, the receiver and stock being in section on the line y g/ of Fig. lV and the other parts being partly broken away. Fig. et is a section on the line g/.y of g. l, showing; the pcsit-ioner" thepnrts when e is tired. 1nig. 5 a section across the un on the iine .e of Fig. l. Fig. 6 is a perspective view of the receiver, partly broken away. ifig. I is a perspective view of the breech bolt 'with the tiring pin contained therein. Fig. 8 is a perspective view ci the cover-plate or dust-guard. Fie. 9 is a perspective View of the sleeve and breech-bolt, and fig. l is a perspective view of the extractor'.

in its general forni the receiver' A is a hollow cylinder' and has a threaded portion l, into which the rear end ot' the gun-barrel is screwed.' Along the top the receiver is out away behind the threaded end to forni an opening' through which there is access into its interior. There is a longitudinal opening 2 through the under side of the receiver just back of the barrel, through which the cartridgespass from the magazine. At the rear end there is another opening 3, through-Which theharnnler passes. The receiver is provided with a suitable tail 4 for fastening it to' the gun-stock. There is a narrow slot 14 in one side, th rough which a spring-actuated ejector P projects to throw the exploded shell out of the receiver when the breech mechanism has been drawn hack. The receiver is provided on its inner surfaces with suitable guides extending iroxn its rear end forward nearly to its front end to guide the breech mechanism as it is slid backward and forward. These guides consist of grooves 5 G, one on each side of the receiver, a guide-face 7 for the sleeve on one side., and a-guide-face for the sleeve and extractor on the other side, the 1astnamed guide-face'being formed by an extension of the under side of the groove 6. Immediately back of the threaded end of the reL ceiver and adjoining the rear end of the barrel is a cylindrical chamber limited at its rear by locking-shoulders 8 9, which lie in a plane accurately at right angles to the axis of the gun. it is intended that the bolt-head of the breech-bolt shall revolve Within this chamber and shall be locked by the shoulders.

The breechbolt consists of a bolt-head Il and a stein 10, which is a hollow cylinder through which the liring-pin passes. On the bolt-head are two lugs l1 l2, which extend outwardly on opposite sid'es. The height of these lugs is such that they will just clear in the chamber at the forward end of the receiver, and their rear ends are accurately faced, so as to bear evenly against the shoul-` ders at the rear of the chamber to lock the holt-head and prevent it from being driven back by the explosion of the cartridge. The bolt-head is recessed in front, so as to provide a rim 13 to center the cartridge. There is a groove 1i in the bolt-head at the proper place, as indicated, to permit the ejector P IOO by which it is rigidly attached to the sleeve,-

to strike the cartridge. Hack of the bolt-head and on the stem are spiral ribs 15, forining parts of screw-threads. Their purpose is to rotate thebolt-head as the sleeve is pushed forward after the lugs on lthe bolt-head have cleared the locking-shoulders in the receiver.

The bolt-actuat yr consists of a cover-plate or dust-guard C anda sleeve D. The coverplate has on its under side a dovetail groove 16, formed by two in\ va`rdly-proje`cting ribs,

so as to leave a space between it and the breech-bolt within which the blade of the extractor lies. This cover-plate has a tongue 17, which-slides in the groove 6 of the receiver.

On the top of the sleeve is a dovetail rib 18, which engages the dovetail groove of the cover-plate. The rib 18 and a portion of one side of the groove are cut away to receive the tailpiece 2.2 of the extractor. There isalso a tongue 19 on the side of the sleeve, which -slides in the groove 5 of the receiver and, in'

conjunction with the tongue 17 on the coverplate, guides the bolt-actuator. This tongue 19 is cut away except at its en'ds, and in the notch thus formed a latch L, posit-ioned in the side of the receiver, engages and limits the range of movement of the sleeve in both directions. In the forward end of the sleeve and on the inner wall thereof are cut spiral grooves 20, into which the spiral ribs 15 ou the stem of the bolt-head slide. ribs should be of such 'a length that when the bolt-head is su'fliciently rotated to unlock it the ribs shall still engage withl the spiral grooves in the sleeve. It is not material whether the sleeve or the bolt is grooved. Either may carry the spiral ribs and the other the spiral grooves. It is, however, preferable to place the ribs upon the bolt-stem close to the bolt-head and the grooves in the forward part of the sleeve, .as shown, as thereby the point of application of the power to rotate the bolt-head is brought into close proximity to the locking-lugs thereon, avoiding the yielding that might result were the power trans-v mitted through a long stem. ly having the. forward end of the grooves extending to and opening on the front endof the sleeve, as is shown, this arrangement of the parts is permitted with the use of a bolt-stem of reduced diameter and an enlarged bolt-head, for were the grooves formed inthe forward end of the bolt-head stem the stem would necessarily be inserted-in vthe sleeve from the rear thereof or the grooves be continued throughout the length of the stem, necessarily weakening it. The extractor E censists`of a steelblade with a hooked end 2.1 to engage the rim on the end ofthe cartridge and a projecting piece 22 to'engage with the stops 23 2%, formed 'by cutting away the dovetail joint betweenthe cover-plate and the sleeve. These stops are so placed as to admit of a longitudinal movement of theextractor relatively to the sleeve which is equal to the longitudinal movement of the sleeve relatively to the Aloreeeh-bolt The spiral while the latter is being rotated. It is important that the extractor shall not change its position longitudinally with respect to the bolt-head nor move on the head of the cartridgethat is to say, it should not rotate with the bolt-head. It is, moreover, advantageous to have the extractor free to be disengaged from the other parts of the breech mechanism when the latter is removed from .the receiver, so that the parts can be readily separated and cleaned.

The tiring-pin F, which passes through the center of the breech -'bolt, is normally held rearwardly therein by the springf with the /rear shoulder of the tiring-pin against the nut f, closing the rear of the bolt-stem; but when the gun is fired it is driven forward and strikes vand explodes the cartridge which lies in the The rear .end of end of the gun-barrel G. the firing-pin is struck by the hammer H, which is pivoted in the stock K. A thumbpiece is shown on the hammer for operating it byhand, and of course the hammer can be arranged to be set at half-cock, if desired. In order to prevent the hammer from striking the firing-pin, and thereby exploding the cartridge, unless the bolt-head is locked, there is the following arrangement: The hammer is engaged by the lower edge of the rim of the sleeve and is cocked by the latter when it is drawn back, and the firing-pin projects backward but'a slight distance beyond` the end of the sleeve when the latter is pushed\ roo explained, and therefore not traveling backj ward while the bolt-head is being rotated. Thus unless the breech-bolt is pushed home far enough for the bolt-head to be at least partly engaged with its retaining-shoulders the tiring-pin is covered completely by the rear end of the sleeve, and the "head of the hammer is so shaped that it cannot strike the firing-pin unless Ythe firing-pin extends substantially to the maxim um distance back from the end of the sleeve. Therefore if the trigger should be pulled without the sleeve being first pushed home either the `cartridge would not be exploded or 'the breech-bolt would 'be pushed home before the explosion could take place.

T o assemble the parts of the breech mechanism, thesleeveis slipped onto'the breech# bolt in such position that its spiral grooves fall over the spiral ribs in the breech-bolt, and the bolt-head is then pushed forward s uffieiently to permitthe extractor to be slid under the cover-plate with its hooked end in positionv over the front edge of the bolt-head. These parts, it will be' seen, areiall held together without a screw; but it may be desirlIO able to secure the cover-plate in position by locking it to the sleeve by ascrew. To insert` -oel the iatch L in the side of the receiver sed down, and they breech mechanism hed fo i fd.

o ther sideface of the same lug bears inst the head ci the extractor, which lies een it and the guide-face on the lower of the groove 6, the latter thus forming abutment for 'the extractor. So long as e bolt-head cannot be rotated it must travel y'ard or baci; witlinthe sleeve, owing to the gement of the spiral ribs and grooves; when the bolthead has traveled far gh forward for the lugs to clear the lockncnlders in the receiver the bolt-head n the extractor are stopped from forward in by the end of the gun-barrel, and as Lcere is pushed farther forward the boltrotates and is locked in the receiver. hen the breech mechanism is fully withn, a cartridge is forced up from the magalubvdasuitable spring into no sition to 'en i'orwardinto ine barrel, tne rini ot e cartridge passing between the hooked end the extractor and the bolt-head. Owing to c' ence of the ejector it will no-t rise fully lin ment with the barrel until the bolta traveled forward slightly. The front the ring-stud N, which the bolt-head pushes the way on reaching the forward end ts movement. After the explosion the ech mechanism is drawn back. During ai movement of the sleeve the boltheld from movement longitudinally. been rotated far enough to free from the shoulders in the receiver urther "on is prevented bya lug thV extractor, it enters the guides of einer and follows the sleeve backward. the breech mechanism has been drawn ly Athe full distance, the ejectorPstrikes rim of the cartridge and keels it out at the top or the receiver, and the latch L on the f machine-gun of the general stylede- 'crlbeff in my other application,'Seriai No. April 30, 1897, for an automatic ll be seen'that the functionof the boltis to push the cartridge forward into the id hold it there against the recoil of ...osiom The function of the extractor ent with the guiding-grooves in the recartridge is guided into the barrel is to draw the cartridge-shell back with the bolt-head and prevent the latter from rotating farther than is necessary to free it from the locking-shoulders. The function of the rest of the breech mechanism is to cover the slot in the receiver, so as to protect the interior from the weather, and also to effect the rotation of the bolt-head and in the construction shown to draw the bolt-head backward cndforward..

lVhat 1 claim, and desire to secure byLetters Patent of the United States, is-

l. The combination, with a receiver, of a breech-bolt, means for rotating the breechbolt to unlock it from the receiver, and an eX- tractor contacting with the breech-bolt to prevent undue unlocking rotation of the breechbolt, substantially as described.

2. The combination with a receiver, of a breech-bolt provided with a bolt-head havingI locking-lugs thereon, a slegaye encircling theA breech-bolt, means for moving the sleeve longitudinally relative to the breech-bolt, and means located vnear the front of the breechbolt and immediately behind the bolt-head thereon for rotating the breech-bolt relative to the slee Je upon the longitudinal motion of the sleeve,.substantially as described.

In a breech mechanism for firearms, the combination with a receiver, of a sleeve and having spiral ribs formed thereon behind and adgaceiit to the forward end thereciF the sleeve having spiral grooves, the forward ends of which open upon the forward end of the sleeve, the ribs and grooves cooperating to rotate the breech-bolt upon a longitudinal motion of the sleeve, substantially as described.

l. The combination with a receiver, of a sleeve, an extractor, a breechbolt, means for rotating the breech-bolt relatively to both the sleeve and extractor, the extractor acting as apositive stop to limit rotation of the breechbolt, and means for moving the sleeve longi-v tudinally relative to the breech-bolt and extractor, substantially as described.

5. 4In a straight-pull breech mechanism for firearms, the combination with a receiver, a sleeve, an extractor, a breech-bolt, means to unlock. the breech-bolt from the receiver by rotating it relatively to the sleeve and to the extractor and against the extractor as a stop, and a fixed abutment for the extractor adapted. to prevent the displacement thereof when struck by the breech-bolt, substantially as described.

6. ln a breech. mechanism for lirearms, the combination with a receiver having guides fora sleeve therein, a sleeve sliding in the receiver, a breech-bolt, means for imparting a rotary locking or unlocking motion to the breech-bolt by the longitudinal motion of the sleeve, and an extractor, limiting the unlocking motion of the breech-bolt by having its one edge in engagement therewith and its opposite edge in engagement with guides 4upon the receiver, substantially as described.

'a breech-bolt located within the sleeve and I'Io 7. In a breeclimechani'sm for rearms, the combination with a centrally-recessed receiver 'havin g a shoulder thereon and having a longitudinal slot in one side, of a rigidly-connected sleeve and cover plate, the sleeve sliding within the central recess of the receiver and the' cover-plate in the longitudinal slot thereof, and closing it when the breech-bolt closes the breech, a breech-bolt having locking-lugs upon its foi-Ward end, means for rotating the breech-bolt by the longitudinal motion of the sleeve and cover-plate, and an extractor limiting the unlocking rotation of the breechbolt, contained between the cover-plate and sleeve and having a limited longitudinal mo tion in relation thereto, theextractor bearing upon the shoulder formed upon the receiver to prevent its displacelnent by the rotating` breech-bolt, substantially as described.

y8. In a. breech mechanism for firearms the combination with a breech-bolt, of a firingpin, a hammer and a movable safety-stop preventing the contact of the hammer with the ring-pin While the breech-bolt is unlocked and moved by the ham mer to lock the breechbolt and to uncover the firing-piu for conireechfbolt, lsubstantially as described.

`10. In a breech mechanism for iirearms,the nnblnation with a sleeve, of an extractor,

longitudinally movable in respect thereto, a

breech-bolt longitudinally movable and revoluble in respect to the sleeve and revcluble in respect to the extractor, and coacting abutting faces on the extractor and sleeve whereby the sleeve imparts a longitudinal motion to the extractor,substantially as described.

11. In a breech mechanism for firearms, the combination, with a sleeve, an extractor longitudinally movable in respect thereto, a breech-bolt longitudinally movable and revoluble in respect to both the sleeve and eX- tractor and coacting abutting faces on the eX tractor and sleeve whereby the sleeve imparts a longitudinal motion to the extractor, substantially as described.

12. In a breech mechanism for firearms, the combination,with asleeve havinga slot thereh in,a longitudinally-sliding extractor having a projecting piece contained in the slot and engaging the sleeve by which it is moved, a breech-bolt, and means for rotating the bolt and moving it longitudinally by the longitudinal movement of the sleeve, substantially as described.

13. In a breech mechanism for firearms the combination, with a longitudinally-moving and rigidly-connected sleeve and cover therefor, of a breech-bolt, means for causing arotary motion of thebreech-bolt by the longitudinal motion of the sleeve, and an extractor having its stem slidingly held between the sleeve and cover and a projection on the sleeve, to engage and move the extractor,- substantially as described.

Signed by lne iny New York city this lOth day of December 1897.

CHARLES H. A. F. L. ROSS. WVitnesses:

SAMUEL W. BALCH, I-IY. H. WHITMAN.

US643984A 1897-12-29 1897-12-29 Magazine bolt-gun. Expired - Lifetime US643984A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3368298A (en) * 1967-01-03 1968-02-13 Browning Ind Inc Breech bolt carrier assembly and slide cover therefor
US20040200110A1 (en) * 2001-05-24 2004-10-14 Greenhut Paul M. Cartridge chambering system for firearms

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3368298A (en) * 1967-01-03 1968-02-13 Browning Ind Inc Breech bolt carrier assembly and slide cover therefor
US20040200110A1 (en) * 2001-05-24 2004-10-14 Greenhut Paul M. Cartridge chambering system for firearms
US6898888B2 (en) 2001-05-24 2005-05-31 Paul M. Greenhut Cartridge chambering system for firearms

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