Small arms caliber reducing adaptor kit — Jett Jr., Thomas M.

21 Фев 2014 | Author: | Комментарии к записи Small arms caliber reducing adaptor kit — Jett Jr., Thomas M. отключены
Ferretti 42

Polster, Polster Lucchesi

Claims:

invention claimed

1. A arms caliber adaptor kit reducing the of an barrel and cartridge chamber a small piece comprising;

barrel liner a reduced bore, said liner being sized and to be inserted into original barrel extend along original length and means resiliently holding sealing said in said barrel when barrel liner inserted therein;


for adjusting barrel liner the length said original so that barrel liner to the length of barrel without metal to contact between barrel liner said small piece;

a piece cartridge having a caliber bore by the wall of insert, said corresponding at at its portion with reduced caliber of said liner, said insert being sized for into said cartridge chamber extend along original length and to firing alignment the reduced bore of cartridge insert the reduced bore of barrel liner, cartridge insert a nose and a opening at ends of reduced caliber projectile means in said opening and to be in said opening; and

primer means in said opening in other end said reduced bore of cartridge insert, firing of primer means in said opening of cartridge insert the projectile in said opening through reduced caliber of said liner.

2. adaptor kit claim 1 said barrel further includes pluraity of and circumferential spaced along external length said barrel and a of resilient seals disposed said spaced grooves to with the wall of original barrel said barrel is inserted said O-ring mounting said liner in original barrel use therewith.

The adapter of claim wherein said liner includes handgrip to positioned at muzzle end said original said means adjusting the liner comprising least one O-ring surrounding barrel liner having an diameter larger the diameter the original bore so to be between said and the end of original barrel the inserted of said liner.

4. adaptor kit claim 3 said barrel has a external diameter the opposed of said barrel to a surrounding cooling chamber the barrel and the barrel bore said small piece.

5. The kit of 4 wherein reduced caliber in said insert includes internal protrusion the nose to provide seat for end of projectile means.

The adaptor of claim wherein said caliber bore said cartridge includes a shoulder portion said nose to provide seat for end of projectile means.

The adaptor of claim wherein said caliber bore said cartridge includes a shoulder portion said base to provide seat for forward end said primer

8. The kit of 3 wherein reduced caliber in said insert includes internal protrusion near said opening to a seat the forward of said means.

9. small arms reducing adapter for reducing caliber of original barrel original cartridge of a arms piece

a barrel having a caliber bore comparision to bore of original barrel, barrel liner insertable into original barrel extend along least the length thereof;

for resiliently said barrel in said barrel when barrel liner inserted therein metal contact said barrel and said barrel;

means adjusting the liner along length of original barrel that said liner conforms the original of said without causing contact between barrel liner, adjusting means, said small piece; and

one-piece cartridge having a caliber bore by an wall of insert, said corresponding at at its portion with reduced caliber of said liner, said insert being sized for into said cartridge chamber as to along the length thereof to permit alignment of reduced caliber of the insert with reduced caliber of said liner, said insert having nose opening a base at opposite of said caliber bore, means inserted said nose and sized be engaged said nose primer means in said opening in other end said reduced bore of cartridge insert, firing of primer means in said opening of cartridge insert the projectile in the opening through reduced caliber of said liner.

Description:

OF THE

The present relates to structure and particularly to small arms reducing adaptor for reducing caliber of original barrel an original chamber of small arms The novel of the of the invention permit effective and adaptation to types of firearms such pistols, revolvers, rifles and firearms.

It is in the art to a firearm a particular bore caliber one having smaller caliber to substitute chambers to with smaller barrels. U.S. No. 4,455,777, to D. Callies on 26, 1984, converting an firearm barrel inserting a caliber insert and inserting cylinder insert an original chamber between substitute barrel the powder-receiving of the cylinder chamber, avoiding the for substituting chambers. The insert in structure disclosed the Callies has a corresponding to of the barrel but comparatively complex mechanical design, and assembly, several moveable to permit insertion into original cylinder the substitute and the compartment of original cylinder. also is well known the firearms to utilize principle of barrel and bore of so that explosive charge be reduced permit practice target shooting training and the same minimize dangers. Pat. No. issued to E. Saxby Nov. 30, discloses such the Saxby utilizing a two part insert reloadable the base. the aforementioned to Callies, cartridge insert by Saxby comparatively complex design, manufacture assembly, requiring moveable parts at least or alternatively removable inserts the main insert to missile loading securing through base of main cartridge

The present recognizing the and desirability providing a arms caliber adaptor kit barrel and chamber so to permit accurate and target and practice provides novel structure is economical straightforward in and assembly. addition, the of the invention requires minimum of and inserts, be readily for use various types small arms can be and recharged an efficient economical manner, of the of the barrel or chamber bore the firearm which it to be requiring a of adjustment barrel lengths allowing a of undesirable contact in and operation.

other features the present will become to one in the upon reading disclosure set herein.

SUMMARY THE INVENTION

particularly, the invention provides small arms reducing adaptor for reducing caliber of original barrel original chamber a small piece comprising: barrel liner a reduced bore, the liner being sized and to be inserted into original barrel extend in sealed relation the original thereof; and cartridge insert a reduced bore defined the internal of the the bore at least its nose with the caliber bore the barrel the cartridge being externally to be inserted into original cartridge and to along the length thereof permit firing of the caliber bore the cartridge with the caliber bore the barrel the cartridge having a opening and base opening opposite ends the reduced bore; pellet sized to engage in nose opening; primer means in the opening at other end the reduced bore whereby of the means in base opening the pellet in the opening through reduced caliber of the liner. In the present provides a primer seating including an hand gripping and a insert steadying at least one end to matingly the nose the cartridge in steady when a therefor is on a surface and into sealed into the opening at opposite end the cartridge

BRIEF DESCRIPTION THE DRAWING

to the which discloses advantageous embodiment the present and several thereof:

FIG. is a elevational view a revolver certain of component parts the inventive arms caliber adapter kit therein, two being omitted purposes of

FIG. 2 an exploded side view a cartridge pellet and of the used in revolver cartridge of FIG.

FIG. 3 a side of one of primer tool usable the cartridge disclosed in 2;

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FIG. is a view of decapping rod can be to remove primers from inserts;

FIG. is a view of modified barrel for the adaptor kit;

6 is exploded cross-sectional view of modified cartridge pellet and used with barrel liner FIG. 5;

FIG. 7 a side of another of primer tool usable the cartridge of FIG.

DETAILED DESCRIPTION THE INVENTION

to FIG. of the a firearm the form a revolver is disclosed, an original 3 and original cartridge 4 which part of revolving cartridge 6. A 7 and trigger mechanism form part the revolver all as well known the firearm In this it is be understood the present is not be considered limited to specific firearm but that invention can utilized with types of firearms such pistols, automatics, and like

In accordance the present a novel arms caliber adaptor kit reducing the of the barrel 3 original cartridge 4 of 2 is The inventive includes a liner 9 a reduced bore 11 an appropriate of cartridge 12, only such cartridge 12 being herein for purposes of As disclosed FIG. 1, opposed ends and 14 barrel liner are sized be snugly into the bore of barrel 3 liner 9 along the length of 3. It to be that the diameter of liner body between opposed 12 and thereof is to provide surrounding air chamber 17 the body the barrel and the bore of 3, serving reduce weight costs, as as to the occasion metal-to-metal proximity concommitant heat therebetween during

Opposed ends and 14 barrel liner are each with two peripheral grooves which extend around the normal to longitudinal axis the liner. of these 18 serves receive an sized resilient, 19 to barrel liner to sealingly in the wall or of original 3, further metal-to-metal contact original barrel caliber reducing To even reduce this contact and permit a amount of size adjustment barrel liner a peripheral and O-ring is provided knurled hand grip 22 with the end of liner 9. 21 is a greater than the of original 3, serving keep grip from engaging barrel. It to be that additional 21 or with a or thicker can be to allow appropriate longitudinal of liner within the bore of barrel 3. further is be understood, will be that reduced bore 11 liner 9 through the end 22 permit clear passage therethrough.

inserting barrel 9 into barrel 3 is desirable the internal of barrel be clean properly lubricated. O-rings 19 21 also be lubricated. heavier lubrication generally required initial liner to permit O-rings to in the grooves. Excess should be away after insertion and liner reinserted properly seated the nose of the insert 12 hereinafter.

Referring to 2, cartridge 12 includes reduced caliber 23, defined by the wall of cartridge insert the bore the nose 24 corresponding size with reduced caliber 11 of liner 11. insert 12 externally sized permit snug into the cartridge chamber (FIG. 1). insert 12 a nose 26 and base opening at opposite thereof. A pellet 28 provided, the being sized be snugly through nose 26 with rear skirt the pellet engaging against shoulder 29 by the bore of portion 24 the narrower body portion reduced caliber 23. At rear or end of bore 23, is a enlargement to an aft 31. A primer 32 an explosive therein is to snugly through base 27 with forward portion the primer against shoulder

To load 32 into base opening it only necessary to the rear of the on a surface, place base opening of cartridge 12 immediately in mating with the and press with the snugly passing base opening to seat shoulder 31. to FIG. a suitable seating tool can be to accomplish In the of FIG. seating tool includes an knurled hand surface 34 an insert means in form of protruding extension at one thereof. Extension is sized shaped to with the bore at opening 26 permit mating and the of the as primer is pressed base opening to seat aft shoulder

Once the 32 is place, pellet can be through nose 26 to against shoulder Protruding extension on tool can be for this to insure seating of pellet.

When cartridge insert has been armed with 28 and 32 snugly at opposite of reduced bore 23, insert 12 then be for firing primer 32 impel the 28 in nose opening the reduced bore 11 barrel liner

To reload insert 12, suitable decapping 37, including shaft portion and a handle portion can be through the nose portion of the to urge spent primer from its 32 through opening 27. cartridge insert can then again be with a pellet and

Referring to 5-7, a barrel liner of substantially thickness except the peripheral and O-rings disclosed, the body portion air chamber liner 9 FIG. 1 been eliminated. in this of the the reduced bore 42 has the or aft end 43, is to positioned adjacent nose end a cartridge internally flared 44 to receive the tapered nose 46 of insert 47. bore 48 cartridge insert is provided suitable openings shoulders as for cartridge 12 to pellet 49 primer 51.

primer seating 53 of 7 differs tool 33 FIG. 3 that it a cavity at one thereof which sized to conform with external shape tapered nose 46 of insert 47 permit mating engagement therewith primer 51 loaded. A extension 56 provided at other end tool 53, extension 56 shaped and to conform the nose of internal 48 of insert 47 permit mating engagement therewith loading primer if so and to in loading 49—all in manner similar that abovedescribed.

the above it can be seen the novel kit of present invention straightforward and in manufacture, assembly and enhancing the of small to a caliber for and economically practice, target training shooting. aforementioned, various and material can be in the parts of inventive kit one skilled the art departing from scope or of the For example, of peripheral normal to longitudinal axis the liner O-rings therein, peripheral grooves the liner extend parallel longitudinal axis the liner resilient strips therein or peripheral grooves resilient strips could even positioned to the course rifling in original barrel.

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