US2982550A - Rifle pellet - Google Patents
Rifle pellet Download PDFInfo
- Publication number
- US2982550A US2982550A US747189A US74718958A US2982550A US 2982550 A US2982550 A US 2982550A US 747189 A US747189 A US 747189A US 74718958 A US74718958 A US 74718958A US 2982550 A US2982550 A US 2982550A
- Authority
- US
- United States
- Prior art keywords
- pellet
- bore
- rifle
- ribs
- outside diameter
- Prior art date
- 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
Links
- 239000008188 pellet Substances 0.000 title description 40
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000003380 propellant Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B6/00—Projectiles or missiles specially adapted for projection without use of explosive or combustible propellant charge, e.g. for blow guns, bows or crossbows, hand-held spring or air guns
- F42B6/10—Air gun pellets ; Ammunition for air guns, e.g. propellant-gas containers
Definitions
- This invention relates to a rifle pellet and particularly to a pellet for rifles using carbon dioxide or compressed air as a propellant.
- An object of this invention is to provide a pellet which is accurately produced within close limits and which is always uniform in size and dimensions so that it will accurately fit the bore of the rifle and operate with a maximum degree of accuracy and uniformity.
- a further object of this invention is the provision of a pellet which can be produced from a material, such as soft steel, so that it can be manufactured in large quantities on standard type. screw machines and which is adapted to engage with the rifling Within the bore of a rifle so as to impart rotary motion to the pellet as it is being propelled through the bore.
- a still further object is to provide such a pellet which will continue to be rotated aerodynamically as it is moving through air and until it strikes its target.
- Fig. 1 is a side view showing two of my improved pellets in nested position.
- Fig. 2 is an enlarged side view, partly in central vertical section, showing the details of construction of my improved pellet.
- Fig. 3 is a rear view thereof.
- Fig. 4 is a further enlarged sectional rear view of a modified form of said pellet.
- my improved pellet includes a one-piece body 5 having a head portion 6 which is pointed at 7.
- the said body has a cavity 8 which extends forwardly fromthe rear of the pellet to a point well forward of the center of the body to within a short distance of the head 6 to provide for applying the pressure from the gas propellant near the front of the pellet and thereby preventing it from tumbling and keeping it straight on its course. to form an annular shoulder having a taper conforming to the taper at the front of the head 6 whereby a plurality of'said pellets may be nested together, as shown in Fig. 1, and they will follow in a straight line in the magazine of the rifle.
- the intermediate portion of the pellet is preferably reduced in diameter to provide a waist portion 9 and a rearwardly diverging skirt 10 which terminates at the rear of the pellet around the periphery of the cavity 8.
- the said skirt is provided, around its near trailing edge portion, with a knurl having an annular row of ribs 11 which extend longitudinally of the pellet and are spirally disposed and pitched to conform with the pitch of the rifling in the bore of the rifle.
- the outside diameter of said knurl is greater than the outside diameter of the head portion 6 and said ribs are preferably tapered inwardly towards the head of the pellet to provide a low portion 11-a at the front of said ribs and a high portion 11-h at the rear thereof.
- the said cavity 8 is countersunk at S-a of said knurl, is slightly larger than the diameter of the bore of the rifle so that, upon being propelled through said bore, those of said ribs which do not register with the rifling in said bore will crush against the surface of the bore, while those which do register with said rifling will extend into it and thereby impart the rotary movement as the pellet is being propelled through the bore.
- the pitch of the ribs will power the pellet aerodynamically so that it will continue to rotate until it strikes its target or ends its flight.
- the head of the pellet is slightly tapered annularly at 6-a. This will allow the pellet to enter the bore of the rifle easily and still permit a close fit between the outer diameter of said tapered portion and the inside diameter of the bore.
- the ribs 12 are so formed that each will have a groove 13 running along its outer edge and the entire pellet is coated, by a suit-' able process, with a layer oflead or other soft material forming a shield 14 which is bonded to the ribs 12 by the grooves 13 to resist the inertia as the pellet is rotated by the rifling.
- the outside diameter of the ribs 12, independently of the lead coating, is of a slightly smaller diameter than the inside of the bore, while the outside diameter of the lead coating on said ribs is slightly larger so that the lead coating only will enter the rifling of the bore and impart the rotary motion to the pellet, while the thin coating of lead remaining on the other surfaces of the pellet which contact the inside surface of the bore will shield said surface against contact with the core material of the pellet.
- a pellet including a'one-piece body having a head portion at its forward end and a bore extending lengthwise into the rear end of said pellet, a skirt portion surrounding said bore, and a knurl surrounding said skirt adjacent the trailing edge thereof and including a plurality of spaced ribs extending radially from said skirt and disposed spirally thereon to thereby aerodynamically rotate said pellet as it is projected through air; the outside diameter of said knurl being less at its forward edge than at its trailing edge and greater than the outside diameter of said head portion.
- a pellet for a rifle including a one-piece body having a head portion, an open axial cavity in the rear end of said body, a trailing skirt portion surrounding said cavity, and a knurl comprising a row of spirally disposed ribs surrounding said skirt portion and disposed adjacent said rear end; the outside diameter of said knurl being greater than the outside diameter of said head portion.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
y 2, 1961 N. B. FRANCIS 2,982,550
RIFLE PELLET Filed July 8, 1958 INVENTOR. /V/cH0/ H5 5 Haw/v0.5.
I HTTOIPNEY.
United States Patent 2,9825% Patented May 2, 1961 RIFLE PELLET Nicholas B. Francis, 33 Rundelane, Bloomfield, Conn.
Filed July 8, 1958, Ser. No. 747,189
2 Claims. (Cl. 273-106) This invention relates to a rifle pellet and particularly to a pellet for rifles using carbon dioxide or compressed air as a propellant.
An object of this invention is to provide a pellet which is accurately produced within close limits and which is always uniform in size and dimensions so that it will accurately fit the bore of the rifle and operate with a maximum degree of accuracy and uniformity.
A further object of this invention is the provision of a pellet which can be produced from a material, such as soft steel, so that it can be manufactured in large quantities on standard type. screw machines and which is adapted to engage with the rifling Within the bore of a rifle so as to impart rotary motion to the pellet as it is being propelled through the bore.
A still further object is to provide such a pellet which will continue to be rotated aerodynamically as it is moving through air and until it strikes its target.
Further objects and advantages of the present invention will be more clearly understood from the following description and the accompanying drawing in which:
Fig. 1 is a side view showing two of my improved pellets in nested position.
Fig. 2 is an enlarged side view, partly in central vertical section, showing the details of construction of my improved pellet.
Fig. 3 is a rear view thereof.
Fig. 4 is a further enlarged sectional rear view of a modified form of said pellet.
As shown in the drawing, my improved pellet includes a one-piece body 5 having a head portion 6 which is pointed at 7.
The said body has a cavity 8 which extends forwardly fromthe rear of the pellet to a point well forward of the center of the body to within a short distance of the head 6 to provide for applying the pressure from the gas propellant near the front of the pellet and thereby preventing it from tumbling and keeping it straight on its course. to form an annular shoulder having a taper conforming to the taper at the front of the head 6 whereby a plurality of'said pellets may be nested together, as shown in Fig. 1, and they will follow in a straight line in the magazine of the rifle.
The intermediate portion of the pellet is preferably reduced in diameter to provide a waist portion 9 and a rearwardly diverging skirt 10 which terminates at the rear of the pellet around the periphery of the cavity 8. The said skirt is provided, around its near trailing edge portion, with a knurl having an annular row of ribs 11 which extend longitudinally of the pellet and are spirally disposed and pitched to conform with the pitch of the rifling in the bore of the rifle. The outside diameter of said knurl is greater than the outside diameter of the head portion 6 and said ribs are preferably tapered inwardly towards the head of the pellet to provide a low portion 11-a at the front of said ribs and a high portion 11-h at the rear thereof.
The outside diameter of the pellet, at the high portion The said cavity 8 is countersunk at S-a of said knurl, is slightly larger than the diameter of the bore of the rifle so that, upon being propelled through said bore, those of said ribs which do not register with the rifling in said bore will crush against the surface of the bore, while those which do register with said rifling will extend into it and thereby impart the rotary movement as the pellet is being propelled through the bore. After the pellet has left the bore, the pitch of the ribs will power the pellet aerodynamically so that it will continue to rotate until it strikes its target or ends its flight.
It will be noted that the head of the pellet is slightly tapered annularly at 6-a. This will allow the pellet to enter the bore of the rifle easily and still permit a close fit between the outer diameter of said tapered portion and the inside diameter of the bore. I
In the form illustrated in Fig. 4, the ribs 12 are so formed that each will have a groove 13 running along its outer edge and the entire pellet is coated, by a suit-' able process, with a layer oflead or other soft material forming a shield 14 which is bonded to the ribs 12 by the grooves 13 to resist the inertia as the pellet is rotated by the rifling.
The outside diameter of the ribs 12, independently of the lead coating, is of a slightly smaller diameter than the inside of the bore, while the outside diameter of the lead coating on said ribs is slightly larger so that the lead coating only will enter the rifling of the bore and impart the rotary motion to the pellet, while the thin coating of lead remaining on the other surfaces of the pellet which contact the inside surface of the bore will shield said surface against contact with the core material of the pellet.
It will be understood that, when a charge of propelling gas or air is applied to my improved pellet, the propelling pressure upon the pellet is placed upon the forward end of the cavity 8 and, since said end is well forward of the lengthwise center of the pellet, said pellet will be propelled forwardly with its knurled end trailing and the ribs 11 acting as an aerodynamic tail to prevent toppling of the pellet as it leaves the bore.
I claim:
1. A pellet including a'one-piece body having a head portion at its forward end and a bore extending lengthwise into the rear end of said pellet, a skirt portion surrounding said bore, and a knurl surrounding said skirt adjacent the trailing edge thereof and including a plurality of spaced ribs extending radially from said skirt and disposed spirally thereon to thereby aerodynamically rotate said pellet as it is projected through air; the outside diameter of said knurl being less at its forward edge than at its trailing edge and greater than the outside diameter of said head portion.
2. A pellet for a rifle including a one-piece body having a head portion, an open axial cavity in the rear end of said body, a trailing skirt portion surrounding said cavity, and a knurl comprising a row of spirally disposed ribs surrounding said skirt portion and disposed adjacent said rear end; the outside diameter of said knurl being greater than the outside diameter of said head portion.
References Cited in the file of this patent UNITED STATES PATENTS 1,512,993 McLean Oct. 28, 1924 1,959,737 Rigsby May 22, 1934 2,125,591 Smith Aug. 2, 1938 2,299,073 Beasley Oct. 20, 1942 2,581,505 Wells Jan. 8, 1952 2,618,254 Wells Nov. 18, 1952 2,635,599 Wells Apr. 21, 1953 2,818,056 Martin Dec. 31, 1957
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US747189A US2982550A (en) | 1958-07-08 | 1958-07-08 | Rifle pellet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US747189A US2982550A (en) | 1958-07-08 | 1958-07-08 | Rifle pellet |
Publications (1)
Publication Number | Publication Date |
---|---|
US2982550A true US2982550A (en) | 1961-05-02 |
Family
ID=25004040
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US747189A Expired - Lifetime US2982550A (en) | 1958-07-08 | 1958-07-08 | Rifle pellet |
Country Status (1)
Country | Link |
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US (1) | US2982550A (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3398682A (en) * | 1966-09-14 | 1968-08-27 | Michael F. Abela | Spinning projectile |
US3913487A (en) * | 1973-09-07 | 1975-10-21 | George H Scherr | Projectile |
US4449982A (en) * | 1976-11-10 | 1984-05-22 | Minnesota Mining And Manufacturing Company | Projectile |
JPS6375000U (en) * | 1986-10-29 | 1988-05-18 | ||
US4955620A (en) * | 1989-07-24 | 1990-09-11 | Reinke Thomas E | Aerial game projectile |
US8950334B1 (en) * | 2013-11-13 | 2015-02-10 | The United States Of America As Represented By The Secretary Of The Army | Pre-deformed obturator for tube-launched projectile |
US20150308799A1 (en) * | 2014-02-06 | 2015-10-29 | Sig Sauer, Inc. | Hollow point bullet and method of manufacturing same |
USD752703S1 (en) * | 2014-01-10 | 2016-03-29 | Gamo Outdoor, S.L. | Bullet |
USD752702S1 (en) * | 2014-01-10 | 2016-03-29 | Gamo Outdoor, S.L. | Bullet |
USD753258S1 (en) * | 2014-01-10 | 2016-04-05 | Gamo Outdoor, S.L. | Bullet |
US10330447B2 (en) | 2017-07-13 | 2019-06-25 | Sig Sauer, Inc. | Projectile with core-locking features and method of manufacturing |
US11067370B2 (en) | 2018-01-21 | 2021-07-20 | Sig Sauer, Inc. | Multi-piece cartridge casing and method of making |
US11262156B2 (en) * | 2019-06-17 | 2022-03-01 | Carl E Caudle | Air gun for conventional metal-jacket bullets |
USD955526S1 (en) * | 2018-12-13 | 2022-06-21 | Michael Douglas Hossack | Pellet |
USD980376S1 (en) | 2018-12-13 | 2023-03-07 | Jennifer R. Hossack | Pellet |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1512993A (en) * | 1922-05-05 | 1924-10-28 | Bertram S Fenner | Air gun |
US1959737A (en) * | 1933-03-02 | 1934-05-22 | Ben G Lindsey | Machine gun |
US2125591A (en) * | 1937-05-17 | 1938-08-02 | Oscar R Smith | Bow and arrow construction |
US2299073A (en) * | 1939-10-26 | 1942-10-20 | William F Beasley | Gun |
US2581505A (en) * | 1948-01-26 | 1952-01-08 | Daisy Mfg Co | Loading mechanism for pneumatic guns |
US2618254A (en) * | 1947-07-21 | 1952-11-18 | Daisy Mfg Co | Repeat loading mechanism for pneumatic guns |
US2635599A (en) * | 1949-08-04 | 1953-04-21 | Daisy Mfg Co | Uniform muzzle velocity pneumatic gun |
US2818056A (en) * | 1955-02-28 | 1957-12-31 | Robert S Martin | Compressed gas-operated propelling mechanism |
-
1958
- 1958-07-08 US US747189A patent/US2982550A/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1512993A (en) * | 1922-05-05 | 1924-10-28 | Bertram S Fenner | Air gun |
US1959737A (en) * | 1933-03-02 | 1934-05-22 | Ben G Lindsey | Machine gun |
US2125591A (en) * | 1937-05-17 | 1938-08-02 | Oscar R Smith | Bow and arrow construction |
US2299073A (en) * | 1939-10-26 | 1942-10-20 | William F Beasley | Gun |
US2618254A (en) * | 1947-07-21 | 1952-11-18 | Daisy Mfg Co | Repeat loading mechanism for pneumatic guns |
US2581505A (en) * | 1948-01-26 | 1952-01-08 | Daisy Mfg Co | Loading mechanism for pneumatic guns |
US2635599A (en) * | 1949-08-04 | 1953-04-21 | Daisy Mfg Co | Uniform muzzle velocity pneumatic gun |
US2818056A (en) * | 1955-02-28 | 1957-12-31 | Robert S Martin | Compressed gas-operated propelling mechanism |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3398682A (en) * | 1966-09-14 | 1968-08-27 | Michael F. Abela | Spinning projectile |
US3913487A (en) * | 1973-09-07 | 1975-10-21 | George H Scherr | Projectile |
US4449982A (en) * | 1976-11-10 | 1984-05-22 | Minnesota Mining And Manufacturing Company | Projectile |
JPS6375000U (en) * | 1986-10-29 | 1988-05-18 | ||
US4955620A (en) * | 1989-07-24 | 1990-09-11 | Reinke Thomas E | Aerial game projectile |
US8950334B1 (en) * | 2013-11-13 | 2015-02-10 | The United States Of America As Represented By The Secretary Of The Army | Pre-deformed obturator for tube-launched projectile |
USD752702S1 (en) * | 2014-01-10 | 2016-03-29 | Gamo Outdoor, S.L. | Bullet |
USD752703S1 (en) * | 2014-01-10 | 2016-03-29 | Gamo Outdoor, S.L. | Bullet |
USD753258S1 (en) * | 2014-01-10 | 2016-04-05 | Gamo Outdoor, S.L. | Bullet |
US20150308799A1 (en) * | 2014-02-06 | 2015-10-29 | Sig Sauer, Inc. | Hollow point bullet and method of manufacturing same |
US9383178B2 (en) * | 2014-02-06 | 2016-07-05 | Sig Sauer, Inc. | Hollow point bullet and method of manufacturing same |
US10330447B2 (en) | 2017-07-13 | 2019-06-25 | Sig Sauer, Inc. | Projectile with core-locking features and method of manufacturing |
US11067370B2 (en) | 2018-01-21 | 2021-07-20 | Sig Sauer, Inc. | Multi-piece cartridge casing and method of making |
USD955526S1 (en) * | 2018-12-13 | 2022-06-21 | Michael Douglas Hossack | Pellet |
USD980376S1 (en) | 2018-12-13 | 2023-03-07 | Jennifer R. Hossack | Pellet |
US11262156B2 (en) * | 2019-06-17 | 2022-03-01 | Carl E Caudle | Air gun for conventional metal-jacket bullets |
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