Abstract: A small, single action revolver having a spring-biased, floating firing pin which is retained within a bore in the frame of the revolver by a lip on the inside surface of a side cover plate which, in turn, is attached to the frame and encloses the hammer and trigger mechanism within a recess in the frame.

Abstract: A firearm, especially of a type accommodating multiple caliber cartridges. In a preferred form, a revolver incorporates an axially revolvable barrel having plural bores of different caliber. The barrel is preferably selectively detachable and reversible top for bottom. A separately mounted means is provided for shell ejection. The revolving cylinder employed is provided with cartridge receiving bores of different caliber and is reversible end for end, being provided at opposite axial extremities mutually displaced sets of teeth accommodating appropriate cylinder rotation, this depending upon the caliber then selected. Means are provided for regulating different cylinder placements for the individual cylinder bores as to each set and as to the respective bores of each set. A safety feature is included for insuring that firing can occur only when proper cylinder and barrel registration exists.

Abstract: A tool for extending the barrel of a revolver crane and for checking the alignment of the crane barrel and cylinder locking aperture in a revolver frame. The crane barrel is inserted over an alignment stud and an adjustable stylus is threaded into contact with the crane barrel near its end. Rotation of the crane barrel causes a groove to be worn on the outer surface of the crane barrel and thus cause the barrel to elongate to its desired length. Additionally, the alignment stud may be used to align the crane barrel to the revolver cylinder locking aperture.

Abstract: A replaceable barrel which screws into a threaded aperture in the frame of a handgun in the form of a single action revolver is properly positioned with respect to the front sight thereon and rigidly secured to the frame by an arrangement which utilizes the base pin for the cylinder and which includes a lug formed on the outside of the barrel adjacent the frame. The cylinder base pin couples to the lug to provide the barrel with the proper angular position relative to the frame and to index the lug and included barrel relative to the frame to compensate for any play therebetween. In a first arrangement for securing the cylinder base pin to the lug a set screw having a threaded exterior is screwed into a threaded aperture in the lug so as to force a conical shaped end thereof within an aperture for the base pin in the frame while at the same time receiving a necked-down front end of the cylinder base pin within a hollow interior thereof.

Abstract: The hand gun has a barrel tht may threadedly be supported from the hand gun frame and which is covered by a shroud surrounding the barrel and extending substantially the entire length of the barrel from the frame to the barrel end. A barrel to shroud nut secures the shroud in place about the barrel and against the frame and has a conical or spherical surface in engaged cooperation with a like conical or spherical seat in the shroud to accurately concentrically align the barrel within the shroud to provide more accurate firing and in particular rapid firing.

Abstract: A firearm having interchangeable barrels and ammunition cylinders for changing the caliber of ammunition used therewith includes a plurality of ammunition cylinders and a plurality of barrels, each barrel being threadedly mountable on the firearm frame with each barrel including a longitudinal barrel extension for interfering with the mounting and revolution of the ammunition cylinders for ammunition having a larger caliber than that of the respective barrel, and the improvement therein includes alignment marks on the barrels and frame for alignment under the full threaded engagement of each barrel in the frame, a plurality of sight ribs with each sight rib corresponding to a different barrel, means for attaching each sight rib to its corresponding barrel at a predetermined location to enable each sight rib to its corresponding barrel at a predetermined location to enable each sight rib to be operatively oriented with the rear sight for aiming the firearm when each barrel is fully threadedly engaged in the fr

Abstract: A firearm having interchangeable barrels and ammunition cylinders for changing the caliber of ammunition used therewith includes a plurality of ammunition cylinders and a plurality of barrels, each barrel being threadedly mountable on the firearm frame width each barrel including a longitudinal barrel extension for interfering with the mounting and revolution of the ammunition cylinders for ammunition having a larger caliber than that of the respective barrel, and the improvement therein includes alignment marks on the barrels and frame for alignment under the full threaded engagement of each barrel in the frame and forward sights on each of the barrels for cooperation with a rear sight on the frame to allow aiming of the firearm when the barrel is fully engaged in the frame thereby insuring that the weapon will only be used when a barrel is fully threadedly engaged in the frame and therefore that the longitudinal extension thereof will be operative to interfere with any ammunition cylinders intended for larg

Abstract: A semi-automatic double action revolver having an axially slidable and rotatable barrel aligned with a lower chamber of a top pivotal swing-out cylinder. The trigger mechanism includes a safety rod to prevent the opening of the cylinder while the hammer is cocked, or not in the rest position, and a transfer bar is provided between the hammer and the firing pin so that the firing pin can only be actuated when the trigger has been pulled all the way back, beyond the double action and single action hammer cock position.

Abstract: An improved revolver with a reduced barrel/cylinder gap (34) employs cylinder-chamber passages (54) through which bullets travel on route to the barrel bore (62) having diameters which are at least 0.005 inch greater than the diameter of the bullets. In this revolver the forcing cone (41) of the barrel bore (62) is at least one-half inch long and has a large-end diameter which is 0.025 to 0.035 inch larger than the bullet diameter. The cylinder/barrel gap (34) is less than 0.004 inch.

Abstract: Improved means for releasably locking the cylinder of a small, single action revolver in proper rotatable position within the frame of the revolver. A cylinder axis pin is adapted to extend through a first bore in the front portion of the frame, then through a central bore in the cylinder, and into a bore in the rear portion of the frame which is axially aligned with the first bore. A counterbore is provided in the front portion of the frame extending inwardly into the front portion of the frame coaxially with the first bore therein. A lip extends downwardly over the top portion of the counterbore at its open end, i.e., at the front or barrel side of the front portion of the frame. A cylindrical coil spring is positioned in the counterbore so that the cylinder axis pin can slide longitudinally through the open cylindrical portion of the spring.

Abstract: Disclosed is a firing mechanism for revolvers having a firing pin and a limit pin each movable by the hammer to engage the cartridge and cooperable to limit the extent of penetration of the firing pin into the cartridge. The limit pin engages the rim of the cartridge casing substantially simultaneously as the primer cup is struck and the cartridge is fired. The extent of penetration of the firing pin into the primer cup is predetermined and does not vary between long and short cartridges. The limit pin further retains the cartridge casing in the revolver chamber initially upon firing to permit maximum radial expansion of the casing while the cartridge casing lies fully seated in the forwardmost position in the chamber. Upon postfiring rebound, the cartridge casing elastically recovers sufficiently to provide a clearance space between the walls of the casing and the cylinder chamber to prevent jamming of the casing in the chamber.

Abstract: A trigger guard assembly preferably for a revolver which is removable from the frame of the firearm includes a trigger guard frame for carrying a trigger, a trigger spring and actuating rod, a cylinder actuating hand and hammer transfer bar assembly and hammer pivot holes in the trigger guard frame. The trigger guard assembly is removably secured to the frame preferably by three support points whereby the trigger guard assembly may be removed from and returned to the revolver frame as a totally assembled unit. Lug and socket means at the front of the trigger guard frame provide a first support point and a second support point is provided by a spring-biased plunger at the rear of the trigger guard assembly having a wedged end coacting with the slot in the frame. The spring biased plunger is preferably operable from outside of the bottom of the frame to release the trigger guard assembly.

Abstract: A single-action revolver is disclosed which includes a cylinder frame and a cylinder to be mounted in the cylinder frame and a barrel removably connected to the cylinder frame. A center pin extends through the cylinder frame for rotatably mounting the cylinder within the cylinder frame, and a release plunger is provided for retaining the center pin in engagement with the cylinder frame in a conventional manner. The improvement is directed to interlocking means for retaining the center pin in engagement with the cylinder frame and includes a slot formed in the barrel and a collar formed on the center pin for engagement with the barrel slot to prevent release of the center pin. In addition, the center pin includes an additional notch for receiving the release plunger when the collar is rotated into engagement with the barrel slot. In this manner, the interlocking means prevent the center pin from being jolted loose during firing of the revolver.

Abstract: The benefits of a dual caliber gun have been set forth in various periodis. Dual caliber revolvers come into consideration as training weapons. Dual caliber revolvers are also important in survival situations, for example downed aircraft or lost hunters. Prior art dual caliber pistons have one barrel below the other one. Such guns possess an inherent accuracy disadvantage. In addition the internal mechanisms of the guns differ so drastically from standard guns that manufacture is expensive and reliability questionable. A more reliable dual caliber gun is provided herein which has a single trigger, normal spring action, and an unmodified firing mechanism.

Abstract: The invention disclosed is a man-portable multi-shot weapon capable of firing relatively large caliber projectiles e.g. 38-40mm at a rapid rate and to the conversion of a similar existing single-shot weapon to multi-shot capability. The multi-shot weapon comprises a barrel, a breech frame on which the barrel is mounted, said breech frame defining a lateral opening through opposite sides of the frame for receiving a magazine having a plurality of chambers to accomodate relatively large caliber projectiles, said magazine being rotatably mounted in said opening in such a manner that the chambers may be successively brought into a firing position in alignment with the barrel, and firing means for firing a projectile when in the firing position.

Abstract: A double action revolver has a frame on which is mounted a cylinder, a trigger and a hammer. A hammer or main spring is interposed between the trigger and hammer such that pulling the trigger causes the spring to compress and bias the hammer toward its fired position. The position of the hammer remains essentially unchanged during initial trigger pull by virtue of a toggle spring device interposed between the frame and the hammer. When the hammer spring is sufficiently compressed, a surface on the trigger contacts and engenders a deflection or buckling of the toggle spring device. Buckling of the toggle spring device permits the hammer spring to drive the hammer to the fired position in which a cartridge is fired.A spring loaded cylinder stop, having a projection adapted to be received in a locking recess on the cylinder, is adapted to be displaced forwardly, against the bias of its spring load during initial trigger return from the pulled position to its normal or released position.

Abstract: A revolver pistol which ejects the spent cartridge after each shot. The gun block is fitted with an open side port. The recoil of the cartridge during firing drives back the hammer and breechblock, with the cartridge ejecting through the open port. The breechblock is spring-biased to return forwards and index the revolver cylinder on the forward stroke, with the hammer remaining in the rear position until released by the trigger mechanism.

Abstract: A pistol of the revolver type having two vertically spaced barrels having bores of different diameters, a cylinder having chambers for two different sized cartridges, the bullets therein being adapted to fit, respectively, the barrels of different diameter, and means for selectively firing cartridges in said cylinder chambers.

Abstract: A firearm construction includes a housing mounting at least one, and preferably a plurality, of barrels, each having a firing bore terminating in an inner projectile charging end and including a magazine compartment in the housing around the projectile charging end of the barrel. A cartridge sealing sleeve is associated with each barrel and extends concentrically behind the projectile charging end and provides a centering for the projectile and the propelling charge therefor. The propelling charge and projectile are carried in a cartridge holder in the form of a plate having a plurality of circumferentially and preferably also radially spaced bores each of which includes a cartridge holder. The cartridge holders advantageously comprise short members having a rear end with a chamber defining a priming cap chamber which communicates through a central passage to an opposite front end in the form of a concave or recessed end which contains the propelling charge and the projectile.

Abstract: A revolver-type pistol has a cylinder formed of a front section rotatably mounted on the pistol frame and a removable rear section formed with a plurality of throughgoing chambers each adapted to receive a respective cartridge. This rear section can be removed from the front section with the spent cartridges and replaced by another section so as to allow quick reloading of the pistol. A coupling is provided between the two sections to rotationally link them together and a spring-loaded mechanism is provided to hold the rear section tightly against the front section. The chambers in the rear section may terminate at the front face of the rear section in small holes alignable with similar holes in the front section so that the blank cartridges exploded in the rear section will discharge through these holes. The front section may have a rearwardly extending stem formed with teeth operated by the mechanism of the pistol to rotate the cylinder.