US20120036984A1

US20120036984A1 - Center fire pistol and rifle cartridge case polishing apparatus

Info

Publication number: US20120036984A1
Application number: US12/806,450
Authority: US
Inventors: Paul D. Calhoun
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-13
Filing date: 2010-08-13
Publication date: 2012-02-16

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.

Description

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

- U.S. Patent Documents


4,178,189	December 1979	Mancini/Galloway

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH

Not applicable

BACKGROUND OF INVENTION

1. Field of Invention
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.
2. State of the Art
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

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

FIG. 1 is a cross-sectional view of the Invention

FIG. 2 is a cross-sectional view of the Invention with a casing installed

DETAILED DESCRIPTION OF THE INVENTION

Referring to the drawings:

- 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 #11 a. The tapered sides of the cone #10 a are angled so as to restrain a casing.
- A shaft # 12 is provided that at least a portion of which is threaded externally #12 a which will engage the partial internal threads of the bore #11 a

The other end of the shaft # 12 is plain #12 b and will easily slide into the bore # 14 of the main body # 15. A set screw # 16 will engage internal threads # 16 a 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 #19 a and the cone #10 a of the retainer # 10 engaging the mouth #19 b of the casing.
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.

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.