Patent application title: Center fire pistol and rifle cartridge case polishing apparatus
Inventors:
Paul D. Calhoun (Winona, MN, US)
IPC8 Class: AF42B3310FI
USPC Class:
86 24
Class name: Ammunition and explosive-charge making ammunition loading implements, including resizing, reconditioning
Publication date: 2012-02-16
Patent application number: 20120036984
Abstract:
What is new in the art of the invention is that it will accommodate all
sizes of, Boxer style, spent center fire brass pistol and rifle casings
faster, safer, more economically, more environmentally sound, with less
parts (see Mancini/Galloway), and far better than the use of a media
tumbler currently used for this purpose.Claims:
1. A device that will allow for the attaching of a spent, de-primed
center fire pistol and rifle cartridge cases of all sizes up to 0.50 cal.
to a drill and turned longitudinally for cleaning and polishing prior to
reloading same comprising: A cone shaped restrainer bored axially that is
at least partially internally threaded ; A threaded rod with external
threads along a portion of its surface that mate with the threads of the
retainer; A body piece that is drilled axially through the center with a
set screw perpendicular to the axis for restraining the rod ; A body
piece that is machined on one end to fit the jaws of a drill chuck; A
body piece that is machined on the opposite end to fit into the primer
pocket of large pistol and rifle primers;
2. A device in accordance with claim 1, that automatically aligns the spent casing axially and checks that the flash hole is centered in primer pocket;
3. A device in accordance with claim 2, that will function on all center fire casings without the need for additional parts or shell holders;
4. A device in accordance with claim 3, that is intended to be used in the art of reloading spent rifle and or pistol center fire casings with boxer primer style flash holes and any other similar application.
5. A device that is intended to be used in the art of case preparation, specifically, cleaning, polishing to minimize scratches, remove excessive tarnishing, discoloration, allowing easier inspection for case defects, and greatly improve general appearance through the use of a mild abrasive such as steel wool, scotch brite, and/or brass cleaners while rotating in a drill the steps are; thread rod onto cone so rod is flush with flat end of cone, insert rod from case neck end through flash hole and out primer pocket, insert rod into axial bore of body at end nearest set screw, allow rod to slide through bore until casing is in full contact with both body and cone, tighten set screw, snug cone to secure casing, place three sided end of body in drill and rotate drill while using steel wool to clean and polish casing. Remove cone by counter rotating drill, remove casing. The apparatus is now set to clean casings of the same caliber by inserting casing onto threaded rod through the flash hole and screwing the cone onto the threads contacting the neck opening of the casing with the conical end of the cone. Repeat for subsequent casings.
Description:
[0001] A tool used to turn spent, Boxer type, center fire pistol and rifle
cartridge casings using a tail stock a rod and a cone shaped piece to
hold the casing while being turned and polished with a piece of steel
wool.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0002] U.S. Patent Documents
TABLE-US-00001 [0002] 4,178,189 December 1979 Mancini/Galloway
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH
[0003] Not applicable
BACKGROUND OF INVENTION
[0004] 1. Field of Invention
[0005] The present invention is intended to be used in the art of reloading spent rifle and pistol center fire cartridge casings with boxer primer style flash holes and any other similar application. The principal intent of the invention is in the art of case preparation, specifically, cleaning, polishing to minimize scratches, remove excessive tarnishing or discoloration, allow for more careful examination of cartridges, and greatly improve general appearance prior to reloading same.
[0006] 2. State of the Art
[0007] The current method for cleaning or polishing spent casings is through the use of a media tumbler that uses ground corn cobs or crushed nut shells that may contain a polishing agent. This method is time consuming, noisy, dirty, and in some cases leaves pieces of media in the flash hole and primer pockets that could be dangerous if not removed. Another method would be the use of a tool invented by Mancini and Galloway that requires the user to buy additional parts (shell holders) in order to accommodate various sizes of casings and that it is possible for the user to place a loaded cartridge in the tool which could be very dangerous and cause bodily harm.
BRIEF SUMMARY OF THE INVENTION
[0008] The present invention provides an apparatus that can be used to clean and polish the outside of spent pistol and rifle casings in conjunction with a rotary hand drill and a mild abrasive contacting the outer surface while turning same, faster, safer, and more economically. The invention solves the problem of having small pieces of media stuck in the primer pockets and flash holes. It also acts as a gauge to detect misaligned flash holes and prevents the possibility of placing a loaded casing in the device.
BRIEF DESCRIPTION OF DRAWING
[0009] FIG. 1 is a cross-sectional view of the Invention
[0010] FIG. 2 is a cross-sectional view of the Invention with a casing installed
DETAILED DESCRIPTION OF THE INVENTION
[0011] Referring to the drawings: [0012] The preferred embodiment of the device of this invention is shown in FIGS. 1 and 2 comprising the cone shaped retainer #10 having a bore #11 extending axially from one end to the other. A portion of the bore #11 is internally threaded #11a. The tapered sides of the cone #10a are angled so as to restrain a casing. [0013] A shaft #12 is provided that at least a portion of which is threaded externally #12a which will engage the partial internal threads of the bore #11a
[0014] The other end of the shaft #12 is plain #12b and will easily slide into the bore #14 of the main body #15. A set screw #16 will engage internal threads #16a that are perpendicular to the axis bore #14 of the main body #15. The rear portion of the body #15 is machined #17 equally on three sides to accept the jaws of a drill chuck. The front portion of the body #15 has been machined #18 to access the primer pocket of rifle and pistol casing using large primers. A cartridge case #19 is shown engaged on the machined front portion #18 end of the body #15 with the shaft #12 through the primer hole #19a and the cone #10a of the retainer #10 engaging the mouth #19b of the casing.
[0015] While there have been shown in the drawings and description what is at present considered the preferred design of the Invention, it will obvious to those skilled in the art that various changes or modifications can be made without departing from the original scope of the invention as defined in the specifications and claims.
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