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Publication numberUS640070 A
Publication typeGrant
Publication dateDec 26, 1899
Filing dateMay 15, 1899
Priority dateMay 15, 1899
Publication numberUS 640070 A, US 640070A, US-A-640070, US640070 A, US640070A
InventorsJacob Gottfried Aeschbacher
Original AssigneeJacob Gottfried Aeschbacher
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 640070 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Patented Dec. 26, |899. J. G. ESCHBACHER.

FI R E A R fv'i (Application filed. May 15, 1899.)

(N0 Model.)

@Nieren raras niet" trice.;


SPEEFEATIGN forming part of Letters Patent No. 640,076, dated December 26,1899.

Application ned nay 15, 1899. serai no. 716,893. ou model.)

tridge of large caliber, thereby not only econoini-zing in ammunition, but reducing the noise of the explosion and enabling a marksman to become familiar with a certain Weapon and practice in places which would otherwise not A further object of 'the invention is to so construct the attachments that said attachments will not necessitate the alteration of the :Weapons to which they are to be applied, and, furthermore, to so construct the attachments as to insure accuracy of re.

Another object of the invention is to provide means for using the attachments in connection With either rim or center fire carridges.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, formin ga part of this specification, in which similarcharacters of reference indicate corresponding parts in all the figures.

Figure 1 is a side View of a revolver, parts thereof being broken away, illustrating the application of the attachments thereto, a portion of the hammer being in section. Fig. 2 is a bottom plan View of the auxiliary barrel employed. Fig. 3 is a rear end view'of the said auxiliarybarrel when in place in the firearm. Fig. 4 is a front elevation of the ejector employed. Fig. 5 is a side elevation of the said ejector. liig. Gis a perspective view of the hammer, and Fig. 7 is a detail perspective View of a stop used in connection with the firing-pin oi' the hammer. g

A represents the hammer of the attachment, l the barrel, and C the ejector.

D represents the body of a revolver of the Smith da Wesson type or that type of revolver that is broken for loading and for the ejection of the shell. G repris the ejector-stem; E, the barrel of the revolver; F, the cylinder, and H the trigger.

The hammer A, thatis adapted to be substituted for the ham mer belonging to the firearm, is provided at the upper portion of its front face with a recess 10, the rear wall whereof is usually concaved, as shown in Fig. 1, and at the upper portion of the rear Wall of the recess 10 a cavity 11 is produced. This recess is adapted to receive the ringpin12. The forward end of the striking-pin is more or less beveled, so as to form astriking-poiut 13 at one side of the center of said pin, and the ring-pin is centrally pivoted at its rear in the said recess l() by means of a suitable pin 15. The rear central portion of the firingpin is preferably cylindrical, as shown in Fig. 1, and a rearwardly-facing shoulder 16 is formed at the side of the pivot of said pin, so that said pin when in one position may be used upon center-fire cartridges and upon being reversed can be used with equally good 'results upon rim-fire cartridges. The firingpin is held in proper position to enter the opening 17 in the 'frame or" the weapon and strike the cartridge at a proper point by directing the iringpin through the medium of a stud 18, provided with a head 18a, as shown in Fig. 7, which head has bearing against the uppermost shoulder 16 of the firing-pin, as shown in Fig. 1, and the body of the stud enters the cavity 11 in the hammer and is encircled byaspring 19, having bearings against the head 18a and the rear yvallof said cavity 19.

The barrel B consists of a body-section 20, that is slightly longer than the length of the main barrel E of the weapon, and a rear section 21, that is adapted to enter a chamber in the cylinder F of the weapon. The outside diameter of the body portion of the auxiliary barrel B corresponds to the inner diameter of a chamber in the cylinder F, and the bore of the auxiliary barrel'througho'ut its length is suitably rilled and is of a diameter to properiy receive a bullet of small caliber-as, for example, caliber 22. The auxiliary barrel ii is provided with a flange 22 at its rear end, and the said rear end portion at the flange tion 26 at one end of the body, the upright section 26 terminating in" a finger 27adapt'ed to enter the slot 24 at the rear of the barrel and engage with the forward face of the rim of a cartridge.4

To accommodate the attachment to the requirements of a revolver of the type shown, the hammer A is substituted fertile ordinary hammer, or the said hammer A may-be actually the hammer of the revolver, as said hammer A can be used upon any weapon to as great advantage as the ordinary hammer; but in eitherevent the cylinder and ejector are removed from the revolver and the new After this has been accomplished the cylinlder is again placed in position inthe body.

The auxiliary barrel B is now pushed into the cylinder and through the main barrel E, the

. slet 24: at the rear of the auxiliary barrel facl hammer A is one that is provided with a re-v cess 10 and channel 11 the firing-pin 12 is tit-` or in direction of the center of The ejector is then cocked and ing downward the cylinder.

is permitted to spring into the said slot 2t in` .tberim of the auxiliary barrel. The flange 22' of the said auxiliary barrel will be thu's closeagainst the ,rear end of the main barrel, and in order to hold the auxiliary barrel firmly in place a nut 28 is screwed upon the outer end b of the auxiliary barrel, which end is reduced and exteriorly threaded, and if the ted into the said hammer. When these changes and additions have been made to a revolver, for example, a person may practice with a revolver of the desired weight, and at the same time a small-caliber cartridge only need be used in such Work. The loading is very rapidly accomplished, since the cartridge is placed directly in the auxiliary barrel from the rear, and as the barrel is continuous the Weapon must of necessity lire straight.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. A caliber-reducing attachment for [irearms comprising an auxiliary barrel having a body-section adapted to fit within the main barrel and a rear section adapted to fit within -a chamber of the cylinder carried by the weapon, the said auxiliary barrel being pro vided with an opening at its rear end for the admission of the ejecting-n ger of an ejector, Y

the auxiliary barrel bef the body-section of ing slightly longer the 'weapon and projecting than the main barrel of therefrom, and a fput screwing on the .projecting end of the auxiliarylbarrel to lock said barrel in placmin; the Weaponsubstantially as described.

2. In a caliber-reducing attachment for firearms, an auxiliary barrel having one section of au exterior diameter corresponding to the' interior diameter of the main barrel into which it is iitted, and a second section of an exterior diameter corresponding to the inner diameter of the chamber of a cylinder can y ried by the weapon, the bore of the auxiliary barrel being constant throughout,and a flange formed upon the rear end of the said barrel, having an opening therein communicating with the bore and adapted to receive a portion of the ejector, for the purpose specified. 3. lnacaliber-reducing attachment for firearms, a hammer having a recess in its front face, a reversible tiring-pin having its rear end arranged in the recess, the said ringpin extending beyond the front face of the hammer and the forward end ot' the said pin'being beveled to form a striking-point at one side of the center of the firing-pin, a pin extending transversely through the rear end of the iring-pinand pivoting vthe firing-pin in the recess in the hammer, and a spring-pressed stud engaging the rear end of said iiring-pin at onev side of the pivot-pin, for the purpose set forth.

4. ln a caliber-reducing attachment for iirearms, a hammer provided with a recess in its front face having its rear Wall concaved land a cavity at the upper portion of the rear wail of the recess, a tiring-pin provided with a strika ingpoint near one side, the said ring-pin having its rear end curved and terminating in a shoulder at the top and the bottom a pin extending through the rear end of the firingpin between the shoulders and pivoting said tiring-pin in the recess in the hammer and. a stud held in the cavity in the hammer and having a head adapted 'to hear against the uppermost shoulder of the firing-pin, for th purpose set forth.

5. The combination, with the main barrel, cylinder and ejector-spindle of a revolver, of an auxiliary barrel having a constant inner bore, its exterior being in sections of diierent diameters, the exterior diameter of one section corresponding to the interior diamsa ter of the barrel of the weapon, and the extee rior diameter of the other section correspond- KGO lid

ing to the interior diameter of the chamber of y the cylinder, said barrel being provided with a flange at its rear and with a depression to Yreceive the rim of a cartridge, the auxiliary barrel at its rearbeing likewise provided with an opening leading into said depressions, an ejector adapted for attachment to the ejector;

` spindle of the weapon and having one section arranged to enter the opening at the rear of the auxiliary barrel, and means for locking Ythe auxiliary barrel in place in thc weapon, as described.

, 6. The combination, with the main barrel, cylinder and ejector-spindle of a revolver, of

an auxiliary barrel having a Constant bore,"itsA exterior being in sections Qfdiferent. diameters, the exterior diameter of one section eorresponding to the interior diameter of the barrel of the Weapon, and the exterior diameter of the other section corresponding to the interior diameter of the chamber of the cylinder, said barrel being provided with a ange at its rear and with a depression to receive the rim of a cartridge, the auxiliary barrel at its rear being likewise provided with an opening leading into said depression, an ejector

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3384989 *Jul 21, 1966May 28, 1968Thurman R. ThomasShotgun bore reducer
US4123866 *Apr 11, 1977Nov 7, 1978Firma Cuno Melcher Kg Me-SportwaffenMuzzle-loading handgun
US4455777 *Jul 6, 1982Jun 26, 1984Callies David GCaliber-reducing kit for a revolver
US4638712 *Jan 11, 1985Jan 27, 1987Dresser Industries, Inc.Bullet perforating apparatus, gun assembly and barrel
US4907362 *Mar 8, 1988Mar 13, 1990Hobbie Edward HSub-caliber firearm
US5421114 *Jan 7, 1994Jun 6, 1995Gregory E. BondGun with improved barrel locking means and rebounding hammer
Cooperative ClassificationF41A21/10