US2845006A - Roller drum support for a revolver-type gun - Google Patents

Roller drum support for a revolver-type gun Download PDF

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Publication number
US2845006A
US2845006A US415989A US41598954A US2845006A US 2845006 A US2845006 A US 2845006A US 415989 A US415989 A US 415989A US 41598954 A US41598954 A US 41598954A US 2845006 A US2845006 A US 2845006A
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drum
revolver
weapon
support
chambers
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US415989A
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John F O'brien
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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
    • F41A9/00Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
    • F41A9/01Feeding of unbelted ammunition
    • F41A9/24Feeding of unbelted ammunition using a movable magazine or clip as feeding element
    • F41A9/26Feeding of unbelted ammunition using a movable magazine or clip as feeding element using a revolving drum magazine
    • F41A9/27Feeding of unbelted ammunition using a movable magazine or clip as feeding element using a revolving drum magazine in revolver-type guns

Definitions

  • My invention relates to a revolver-type automatic I weapon and more particularly to :adevice thereof for supporting a rotatable cartridge drum.
  • the drum is keyed to an axial shaft journaled in the recoil unit of the weapon for rotation of the cham- ⁇ bersto stations spaced correspondingly thereto including 'a six oclock station of the chambers immediately adja- 7 cent the barrel of the weapon for. firing the cartridges therein.
  • the forward bearing of the drum shaft therefore, must be located immediately above the barrel and the minimum pitch radius of the chambers equals the sum of the radii of the barrel and the drum shaft plus the thickness of a bearing wall therebetween.
  • the diameter of the drum is excessive, causing the weapon to present an unnecessarily' large silhouette since the thickness of metal between ,five or even six chambers therein is more than adequate for the strength required to withstand the discharges of cartridges in the chambers.
  • the silhouette of the weapon canbe reduced by reducing the pitch diam- 1 eter of the chambers.
  • Another object of my invention is to provide a weapon .of the kind described having a recoil unit with the car- ,tridge drum thereof rotatable within tangential rollers.
  • a further object of my invention is to provide the recoilunit of such a weapon with a bearing device for circumferential support of a rotatable cartridge drum.
  • a front wall of the housing and a rib of the recoil unit axially position the drum.
  • FIG. 1 isjan elevational view, partly ing sectio .-:,of a
  • Fig. 6 is a perspective view of the drum bearings.
  • V 7 is a perspective view of the drum bearings.
  • a revolver-typeweapon 12 includes a receiver 14 with a recoil unit 16 slidably disposed thereon, by means of feet '17 extending into recesses of the receiver.
  • Recoil unit 16 includes a barrel 18 and a support housing 20 for a drum 22 including chambers 24 :and corresponding index rollers 26.
  • Support 20 is provided with forward and rearward sets of rollers 28 journaled on pins 30 secured in bosses 32 of support 20 bymeans of needle bearings 34.
  • Drum 22 is provided with a pair of circumferential bands 36 for tangential engagement with hearing rollers 28 and the rollers are disposed to circumferentially restrain the drum v Support 20 is relieved by channels'29 in the support.
  • Drum 22 is restrained forwardly and rearwardly, respectively, by a front wall-38 secured to support 20 by means of bayonet lugs 39 and a stop 40 of recoil unit 16.
  • Barrel 18 is threadably secured to a boss 41 projecting forwardly from front wall 38.
  • the forward ends l of chambers 24 are usually provided with obturating sleeves to prevent escape of discharge gases :and, forward wall 38 includes a portion 42 for engaging the. forward end of drum 22 to retain the sleeves in place during rotation of the chambers. Portions of the wall may include.
  • An actuator 54 slidable with respect to recoil unit 16 :on feet 55 is biased by springs 56 in engagement with'a rear wall 58 of receiver 14 to a battery position in engagement 'with I I plunger 50.
  • Actuator 54 includes surfaces for engagement with index' rollers 26 for reciprocal operation responsive to discharge of firing station cartridges 45 to serially convey chambers 24 to stations including the firing station. Gases from the discharge force piston48, plunger 50, and actuator 54 rearwardly against springs 56 to rotate drum-22. When the projectile from cartridge 45 leaves barrel 18, the pressure on piston 48 drops and actuator 54 is returned to the battery position by springs 56 aided by the kinetic energy of drum 22.
  • a shaft 60 is engaged by drum 22 for rotation of a feeder generally shown at 62.
  • chambers 24 may be disposed in a pitch circle for minimum drum wall thickness therebetween to withstand the force of discharge in the firing station. If such a drum-were to be supported by a shaft, the shaft would interfere with barrel 18.
  • the axis of drum 22 coincides with the axis of support 20 and is independent of barrel Reduction of the diameter of drum 22 from the drum diameters required in prior weapons, results in a decrease of the transverse silhouette of the weapon that is only partially offset by the addition of the drum support.
  • a revolver-type automatic weapon comprising a barrel, a recoil unit for support thereof, a drum having spaced chambers for cartridges, a support for said drum secured to said recoil unit, forward and rearward sets of rollers axially jounaled in said support, and a pair of circumferential bands on said drum corresponding to said sets of rollers for engagement therewith for rotational displacement of said chambers.

Description

J. F. CBRIEN 2,845,006
- July 29, 1958 ROLLER DRUM SUPPORT FOR A REVOLVER-TYPE GUN File'd March 12. 1954 2 Sheets-Sheet 1 Wrran NEY5'.
' umszvrok Juhfi III L. O'Brien- July 29, 195 8 J. F. O'BRIEN 2,845,006
' ROLLER DRUM SUPPORT FOR A REVOLVER-TYPE sun Fliled March 12, *1954 2 Sheets-Sheet 2 'INZENTQR.
t Jul-1111i. EIEnman ROLLER DRUM SUPPORT FOR A a I v I REVOLVER-TYPE GUN 1] J hn F. OBrien, Springfield, Mass., assignor to the United States of America as represented by the Secretary of the I v Application March 12, 1954, Serial No. 415,989
1 Claim. (Cl. 89-155) 7 (Granted under Title 35, U. S. Code (1952), see. 266) 1 The invention described herein may be manufactured and used by or for the Government for governmental purposes withoutthe payment of any royalty thereon.
My invention relates to a revolver-type automatic I weapon and more particularly to :adevice thereof for supporting a rotatable cartridge drum.
In the usual weapon including five or six cartridge chambers the drum is keyed to an axial shaft journaled in the recoil unit of the weapon for rotation of the cham- {bersto stations spaced correspondingly thereto including 'a six oclock station of the chambers immediately adja- 7 cent the barrel of the weapon for. firing the cartridges therein. The forward bearing of the drum shaft, therefore, must be located immediately above the barrel and the minimum pitch radius of the chambers equals the sum of the radii of the barrel and the drum shaft plus the thickness of a bearing wall therebetween. Hence, the
surface of the drum extends above the remainder of the weapon'and since the drum is rotatably mounted, it
. usually overhangs the receiver of the weapon. The diameter ofthe drum therefore determines the transverse j .silhouette of the weapon.
- In a weapon so arranged, the diameter of the drum is excessive, causing the weapon to present an unnecessarily' large silhouette since the thickness of metal between ,five or even six chambers therein is more than adequate for the strength required to withstand the discharges of cartridges in the chambers. The silhouette of the weapon canbe reduced by reducing the pitch diam- 1 eter of the chambers. t
It is, therefore, an object of my invention to provide a revolver-type weapon with a low, narrow, transverse.
silhouette.
I Another object of my invention is to provide a weapon .of the kind described having a recoil unit with the car- ,tridge drum thereof rotatable within tangential rollers.
A further object of my invention is to provide the recoilunit of such a weapon with a bearing device for circumferential support of a rotatable cartridge drum.
bearing surfaces for rotation of the cartridge drum in the housing. A front wall of the housing and a rib of the recoil unit axially position the drum.
For a more complete understanding of my invention, attention is directed to the following explanation and the accompanying drawing in which:
- i m ten Fig. 1 isjan elevational view, partly ing sectio .-:,of a
revolver-type automatic weapon incorporating my invention; Figs. 2, 3, linesof Fig. 1;and
Fig. 6 is a perspective view of the drum bearings. V 7
According to the drawing, a revolver-typeweapon 12 includes a receiver 14 with a recoil unit 16 slidably disposed thereon, by means of feet '17 extending into recesses of the receiver. Recoil unit 16 includes a barrel 18 and a support housing 20 for a drum 22 including chambers 24 :and corresponding index rollers 26.
Support 20 is provided with forward and rearward sets of rollers 28 journaled on pins 30 secured in bosses 32 of support 20 bymeans of needle bearings 34. Drum 22 is provided with a pair of circumferential bands 36 for tangential engagement with hearing rollers 28 and the rollers are disposed to circumferentially restrain the drum v Support 20 is relieved by channels'29 in the support.
' to allow insertion of drum'22.
Drum 22 is restrained forwardly and rearwardly, respectively, bya front wall-38 secured to support 20 by means of bayonet lugs 39 and a stop 40 of recoil unit 16. Barrel 18 is threadably secured to a boss 41 projecting forwardly from front wall 38. The forward ends l of chambers 24 are usually provided with obturating sleeves to prevent escape of discharge gases :and, forward wall 38 includes a portion 42 for engaging the. forward end of drum 22 to retain the sleeves in place during rotation of the chambers. Portions of the wall may include.
48 secured to a plunger 50 and the cylinder is connected to the bore of barrel 18 through a passage 52. An actuator 54 slidable with respect to recoil unit 16 :on feet 55 is biased by springs 56 in engagement with'a rear wall 58 of receiver 14 to a battery position in engagement 'with I I plunger 50.
Actuator 54 includes surfaces for engagement with index' rollers 26 for reciprocal operation responsive to discharge of firing station cartridges 45 to serially convey chambers 24 to stations including the firing station. Gases from the discharge force piston48, plunger 50, and actuator 54 rearwardly against springs 56 to rotate drum-22. When the projectile from cartridge 45 leaves barrel 18, the pressure on piston 48 drops and actuator 54 is returned to the battery position by springs 56 aided by the kinetic energy of drum 22.
A shaft 60 is engaged by drum 22 for rotation of a feeder generally shown at 62.
As shown in Fig. 3, chambers 24 may be disposed in a pitch circle for minimum drum wall thickness therebetween to withstand the force of discharge in the firing station. If such a drum-were to be supported by a shaft, the shaft would interfere with barrel 18. However, in the device of applicant, the axis of drum 22 coincides with the axis of support 20 and is independent of barrel Reduction of the diameter of drum 22 from the drum diameters required in prior weapons, results in a decrease of the transverse silhouette of the weapon that is only partially offset by the addition of the drum support.
4 and 5 are .views along the: corresponding recoil unit showing Also, the drum with the reduced diameter requires less energy for rotation and the weapon is operated with less strain on the component parts.
Although a particular embodiment of the invention has been described in detail herein, it is evident that many variations may be devised within the spirit and scope thereof and the following claim is intended to include such variations.
I claim:
A revolver-type automatic weapon comprising a barrel, a recoil unit for support thereof, a drum having spaced chambers for cartridges, a support for said drum secured to said recoil unit, forward and rearward sets of rollers axially jounaled in said support, and a pair of circumferential bands on said drum corresponding to said sets of rollers for engagement therewith for rotational displacement of said chambers.
References Cited in the file of this patent UNITED STATES PATENTS 710,723 Smith Oct. 7, 1902 2,434,653 Holschuh et a1 Jan. 20, 1948 0 2,538,045 Ryan et a1. Jan. 16, 1951 FOREIGN PATENTS 285,180 Switzerland Dec. 16, 1952 863,614 Germany Jan. 19, 1953
US415989A 1954-03-12 1954-03-12 Roller drum support for a revolver-type gun Expired - Lifetime US2845006A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027673A (en) * 1957-03-26 1962-04-03 John R Oliver Low barrel revolver
US3101029A (en) * 1960-11-04 1963-08-20 Joseph L Johnston Feeding mechanism for drum-type firearm

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US710723A (en) * 1901-07-27 1902-10-07 Irving T Smith Magazine toy gun.
US2434653A (en) * 1941-10-24 1948-01-20 Sperry Gyroscope Co Inc Power-operated aircraft gun turret
US2538045A (en) * 1943-04-02 1951-01-16 Sperry Corp Gun mounting
CH285180A (en) * 1950-08-23 1952-08-31 Oerlikon Buehrle Ag Control device on automatic firearms with a revolver barrel.
DE863614C (en) * 1950-08-23 1952-11-17 Verwaltungsgesellschaft der Werkzeugmaschinen fabrik Oerlikon Zurich Oerlikon (Schweiz) Electric ignition device for automatic firearms with revolver barrel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US710723A (en) * 1901-07-27 1902-10-07 Irving T Smith Magazine toy gun.
US2434653A (en) * 1941-10-24 1948-01-20 Sperry Gyroscope Co Inc Power-operated aircraft gun turret
US2538045A (en) * 1943-04-02 1951-01-16 Sperry Corp Gun mounting
CH285180A (en) * 1950-08-23 1952-08-31 Oerlikon Buehrle Ag Control device on automatic firearms with a revolver barrel.
DE863614C (en) * 1950-08-23 1952-11-17 Verwaltungsgesellschaft der Werkzeugmaschinen fabrik Oerlikon Zurich Oerlikon (Schweiz) Electric ignition device for automatic firearms with revolver barrel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027673A (en) * 1957-03-26 1962-04-03 John R Oliver Low barrel revolver
US3101029A (en) * 1960-11-04 1963-08-20 Joseph L Johnston Feeding mechanism for drum-type firearm

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