Abstract: A firearm such as a semiautomatic pistol or handgun includes a barrel and a slide with a front aperture for rearward movement of the slide around the barrel during cycling of the slide between forward and rearward positions. A wire bushing is provided between the outer diameter of the barrel and the inner diameter of the aperture of the slide for positioning the barrel within the aperture during cycling. The wire bushing is a spring-like, generally round or O-shaped member (e.g., a bent metal wire) mounted within a groove provided in the slide aperture, with portions of the bushing being bent to lie out of the groove for contacting the barrel. The wire bushing reduces the tolerances between the slide and the barrel, thereby improving operation of the firearm, improves re-location of the barrel within the slide, provides for easier maintenance, and reduces mass, cost, and complexity.

Abstract: A rifle has a shoulder support and at least one barrel connected to the shoulder support. A trigger is provided and a chamber is arranged behind the trigger when looking in a direction from a front end of the barrel toward the shoulder support. A movable breechblock has a closed position in which the chamber is closed off. At least one firing pin for firing a cartridge inserted into the chamber when the trigger is triggered is provided. A coupling mechanism connects the shoulder support or a swivel arm to the breechblock. The breechblock is movable by a pivot movement of the shoulder support or the swivel arm transmitted by the coupling mechanism. An axis of rotation of the shoulder support or the swivel arm is arranged within a space delimited by the breechblock and the trigger viewed across a length of the rifle.

Abstract: A breech system for a firearm exhibits a breech which can be locked in its movement in the barrel block by at least one locking element, which is pressed against the rear end of the barrel by means of a breech spring surrounding the rigid barrel of the weapon, the barrel being enclosed with the exception of the front and rear apertures, whereby the breech spring is supported at the rear section of the barrel and at least one link element subjected to tension connects the front end of the breech spring and the breech. In order to guarantee precise function and in a manner which is safe for the user, by means of a simple arrangement which is reproducible in manufacture, a purely mechanical delay element is inserted in the link between the breech (10) and the breech spring (9).

Abstract: A pump gun is disclosed having a loading and firing mechanism which comprises a cartridge stop lever (21), that is not connected to the hammer, interacts with the cocking slide (22) associated with the cartridge magazine and is susceptible to rocking movements on an intermediate pin (30) between an operating interception position of a first cartridge in the magazine, when the cocking slide is in a retracted work position, and an idle release position of the same cartridge from the magazine tube, when the cocking slide is in the forward rest position.

Abstract: A firing mechanism for a firing pin striker operated semiautomatic handgun that includes a sear, a sear block housing, and a pivot arm. The sear is attached to the pivot arm and includes two angled surfaces and an edge portion for controlling the firing pin. The edge portion abuttingly engages an extension of the firing pin adapted to be in planar movement with the edge portion of the sear. The pivot arm and sear move together in an arcuate path about the pin in response to trigger firing movement. Unlike prior art firing mechanisms, the sear does not move vertically along an axis perpendicular to the bore of the handgun. The arcuate movement of the pivot arm causes the edge portion of the sear to disengage from the firing pin. The angled surfaces of the sear allow the firing pin extension to pass over the sear discharging the firearm.

Abstract: A safety lever (safety control member) is provided in its inner surface with first, second and third positioning holes. The tapered outer end part of a safety lock (trigger blocking member) is engaged in the first positioning hole of the safety lever to retain the safety lever at a perfect lock position. In this state, the forward turning of the upper arm of the trigger is blocked by the safety lock. Thus, the trigger cannot turn even if the same is pulled. Since the safety lock is fitted in a sliding hole formed in a casing so as to be slidable in directions perpendicular to a plane in which the trigger turns, and force applied to the trigger is born by the casing, the safety lock does not deform and is able to block the movement of the trigger with reliability even if the trigger is pulled strongly. In this state where the safety lever is at the perfect lock position, the bolt blocking part of the safety lever is engaged in a groove formed in a bolt.

Abstract: A semiautomatic handgun having multiple safeties includes a body made in two halves and a slide which can move lengthwise on a pair of rails. The hammer is cocked by rearward movement of the slide. The trigger, which has purely translation motion, is blocked from behind except when the user is wearing a special magnetic ring on his trigger finger. A decocker mechanism pushes the firing pin forward and slides the sear back, and prevents release of the hammer until the firing pin is blocked. The firing pin is normally blocked by a cup, which prevents the firing pin from moving forward if the gun is dropped. The cup is moved to an inactive position by a release lever only when the trigger is pulled. A safety lock, which is preferably operated by a special tool, prevents the transfer bar from moving. The firing pin block lever is locked in a downward position when the safety is activated. A hammer block bar prevents the hammer from moving when the safety is on.

Abstract: A firearm having a reciprocating bolt assembly comprising a spring biased ejection port cover operatively connected to the bolt assembly to cover the ejection port when the bolt assembly is in the forward breech closed position, and which moves with the bolt assembly to uncover the ejection port when the bolt assembly is in the rearward breech open position.

Abstract: An improved single-shot rifle is shown having a rifle barrel secured to a receiver and having a lever-activated falling block action. The action includes a hammer and trigger each pivotally connected to the lever. A breechblock is moveable downwardly within a breechblock mortise provided on a rear surface of the receiver from a safety position wherein a firing pin carried thereby is aligned with a recess in the hammer and a firing position in which the firing pin is aligned with a striking surface of the hammer so that pulling the trigger releases the hammer and allows the striking surface thereof to strike the firing pin and fire the rifle.

Abstract: A single shot falling breech block action that includes an upper receiver assembly, a lower receiver assembly, breech block assembly, a trigger assembly, a stationary rack, a movable rack, a pinion, an action plate, and pinion rotating apparatus.

Abstract: A sighting system for a shotgun useful for a user to align firing trajectory with a target. The system includes a sight rigidly fixed at a forward end of the shotgun barrel, and a rearward, transient sighting element which is utilized to establish concurrent sighting alignment on a single target for (i) a first line of sight coaxial with a shotgun bore and (ii) an adjustable, second line of sight defined by a line connecting the sighting bead of the forward sight and the aligned aperture of the rearward sighting element with the target. An adjustable comb is coupled to the stock of the shotgun and is raised to and locked at a proper height to define a contact reference location on the user's face. In this position, the shooter's eye is centered on the second line of sight and the transient sight element may be removed. Inter-changeable components permit selection of variable heights and sizes for both the forward sight, bead, blade and rearward sight element.

Abstract: A hand-operated opening lever in a gun is pivotal about an opener shaft to move a wedge-type breechblock between an open position and a closed position, and includes: a lever body which is movable between a first, rest position and a second position for respective manual opening and closing operations; the lever body including a manually displaceable locking bolt and an energy storing device which includes a receiving chamber; a transfer device in form-locking connection with the opener shaft for transferring stored energy between the opener shaft and the lever body for actuating the opener shaft to move the wedge-type breechblock between the open position and the closed position; the transfer device, during automatic opening of the breechblock, causing energy to be stored in the energy storing device in the lever body, and transferring stored energy from the energy storing device to the breechblock during automatic closing of the breechblock; the transfer device including a follower member selectively engage

Abstract: A decorrelated spur digital radio frequency memory (DRFM) system stores incoming radio frequency (RF) signals in a digital memory and at some later time replicates these RF signals at the output. The input RF signal to be stored is mixed with a local oscillator (LO) signal, which is coded with a decorrelation waveform, to produce an intermediate frequency (IF) signal which is next digitized with a multibit analog-to-digital (A/D) converter. This data is stored in a digital memory and is later retrieved from the memory and converted back to an analog IF signal. The IF signal is then mixed with the coded LO to produce a replica of the original RF signal. The code on the LO is the same decorrelation waveform used to produce the input IF signal. The resultant RF output spectrum can be made to be spectrally clean, i.e., containing no spurious harmonic signals arising from the signal's quantization.

Abstract: A double barrelled firearm includes first and second parallel barrels attached to a casing which includes a pair of spaced parallel arms. A firing lever is pivotable about a bearing extending between the spaced arms from a first non-firing position to second firing positions successively inwardly of the casing. A bolt is slidably mounted on the casing at a location rearwardly of the barrels. The bolt has first and second firing pins aligned with the first and second barrels. The first and second firing pins have extending therefrom respective first and second stops of different lengths. The first and second firing pins are urged toward the first and second barrels respectively. The firing lever has on a first end thereof a guard which, when the firing lever is in the first non-firing position thereof, acts on the first and second stops to maintain the first and second firing pins spaced from the first and second barrels, against the force of the urging means.