Abstract: An indexing line guide for a copy stand having an upright pallet for supporting sheets with horizontal lines of text to be copied. The pallet has a guide rail along one side edge, the rail having a row of rack teeth on the rearward side. A slide is received on and secured to the rail for longitudinal movement, the slide including a line guide that extends over and parallel to the lines of text on the sheet. The slide has an escapement that cooperates with the rack teeth as the guide rail and which is actuated by a lever adapted to be tapped by the user. When the lever is actuated, a pair of teeth in the escapement reverse their relation to the rack teeth momentarily and then reengage the rack teeth at the next lower position. With this operation, the line guide is repositioned immediately below the next line of text on the sheet to be copied.

Abstract: A hand-held, single-shot grenade launcher including a receiver and attached stocks for both hands, a barrel slidable in the receiver, an assembly of Belleville springs for absorbing recoil and a breech connected to the end of the barrel. A grenade round is manually inserted in a firing chamber defined by the breech and the inner end of the barrel and cammed into firing position by a sliding breech block that carries a pivotal firing lever operated by a striker mounted in the receiver. The striker is biased by a helical striker spring and is cocked by a cocking lever associated with the right hand grip. The weapon is fired by depressing the cocking lever and thus pulling the trigger to cam the striker upward and release it from a sear operated by the cocking lever. Upon release the striker impacts an arm of the firing lever to drive a firing pin carried by the other arm of the firing lever into the primer of the grenade round casing.

Abstract: A machine pistol with means for retarding blowback of the slide assembly. The device has both right hand and left hand stocks to enable the weapon to be fired from a comfortable visual sighting position at eye level with the wrist axes perpendicular to one another. The slide assembly includes a bolt that carries the firing pin, extractor and ejector and that reciprocates relative to the receiver and barrel, and a tubular cylindrical muzzle sleeve removably connected to the forward end of the bolt and that fits coaxially around the barrel. A coaxial helical spring fits between the barrel and muzzle sleeve to urge the muzzle sleeve (and bolt) to the forward firing position wherein the forward end of the muzzle sleeve extends outwardly beyond the end of the barrel.

Abstract: Dual shell feeding apparatus for a dual shell supply automatic gun and the like includes a shell rotor mounted in rotational shell transferring relationship between the two supplies and a shell pick up position of the gun. The rotor is stepped in one rotational direction to feed from one shell supply and the opposite direction to feed from the other supply, shells being fed into the rotor from the supplies according to rotor rotational direction. Selecting apparatus enables prefiring selection of rotor stepping direction and hence shell supply selection for a next firing. A shell accumulator is provided for temporarily holding shells left in the rotor when a firing sequence stops.

Abstract: Two stage shell feeding apparatus for a reciprocating bolt-type automatic cannon or gun, comprises a first stage shell rotor, having a plurality of shell cavities, rotatably mounted between a shell supply and a cannon shell pick up position, such that when a shell in one of the rotor cavities is in the shell pick up position, an empty rotor cavity is in shell receiving relationship with the shell supply. After firing of the cannon and while the bolt is recoiling rearwardly, barrel gas operated actuating means cause rapid partial rotation of the rotor to index a rotor carried shell into the pick up position. A spring actuated, second stage shell advancing slide is simultaneously cocked to enable subsequent spring powered transferring of a free shell from the shell supply into the aligned rotor cavity during the remainder of the firing cycle. Shell accelerator means are provided to cause shell acceleration before bolt pick up impact.

Abstract: Two handed holding apparatus for all types of hand held firearms, including handguns, rifles, submachine guns and the like, includes a first handle fixed to the firearm to one side of a barrel bore axis and a second handle fixed to the firearm to an opposite side of the barrel bore axis in alignment with the first handle. The two handles, adapted to be individually held by one of a user's hands, divide firing recoil between the user's hands in a generally symmetrical manner to eliminate muzzle jump. For handguns, having a preexisting handle, a frame extension is provided, to a projecting end of which the second handle is fixed in orthogonal relationship to the first handle. To convert existing handguns, the frame extension is attached to the first handle and replaces one of the existing handgrips. The frame extension is configured to receive a pistol scope or fixed sights. In a variation, the frame extension is permanently fixed to the pistol frame, as an addition or as part of the original frame.

Abstract: Dual shell feeding apparatus for automatic guns having two shell supplies adapted for holding different types of shells, comprises a shell feeding rotor formed with first and second sets of three peripheral shell holding cavities each, the cavities being arranged in alternating relationship at 60.degree. intervals. The rotor is rotatably mounted between the two shell supplies and a shell pick up position of the gun in a manner causing, when one of the shell holding cavities of either cavity set is in the shell pick up position, another cavity of the same cavity set is in shell receiving relationship with the corresponding one of the shell supplies, shells being fed from one of the supplies by one of the rotor cavity sets when the rotor is selectively rotated in one direction and from the other supply by the other cavity set when the rotor is selectively rotated in the opposite direction.

Abstract: Cross axis shell feeding apparatus for firearms comprises symmetrical shell pivoting or turnaround means having an internal pivoting chamber configured for receiving, and pivoting through 90.degree., shells from an associated linear shell magazine in which the shells are loaded in either cross axis direction. The shell pivoting chamber, formed having shell engaging, or camming surfaces which cam the shells through 90.degree. of rotation, is shown configured for pivoting tapered casing, rifle-type shells. Shells are pushed forwardly through the shell pivoting means by first and second stage rammers mounted to reciprocate with the firearm bolt assembly. To prevent jamming of shells being pivoted 90.degree. in the shell pivoting means, shell engaging portions of the first stage rammer swing aside after a shell has been pivoted from an initial cross axis orientation through approximately 75.degree..

Abstract: For an automatic cannon, a pneumatic bolt and sear buffer comprises a housing fixed rearwardly of a breech ring, a cylinder, an end plate and a low mass piston projecting forwardly through the cylinder. A pin transversely installed through the piston, into slots in the cylinder and housing, limits relative axial movement between the piston, cylinder and housing. A forward cylinder flange also limits rearward cylinder movement relative to the housing. Pressurization of gas in a pressure chamber defined by the cylinder, piston and end plate is through an end plate valve. A bolt sear is pivotally mounted to a sear bracket extension of the cylinder, forwardly of the piston. After firing, recoil impact of a reciprocating bolt assembly drives the piston rearwardly into the cylinder, and upon bolt searing the cylinder is pulled forwardly relative to the piston; in both cases the buffer gas is further compressed, acting as a massless spring.

Abstract: Anti-bounce apparatus for an automatic cannon reciprocating bolt assembly which includes a bolt, a bolt carrier and bolt mounted locking lugs, comprises means defining engagement surfaces contoured for enabling the forward moving carrier to cam the lugs into bolt locking relationship with a cannon breech at increasing velocity, without bouncing, carrier energy loss being thereby minimized and firing of a chambered shell by a carrier mounted firing pin being assured. Further comprising the anti-bounce apparatus is a plurality of inertially actuated locking collets connected to the bolt carrier for causing, responsive to impact of the carrier with the breech at the instant of firing, frictional locking between the carrier and portions of the cannon fixed to the breech, rearward bouncing of the carrier relative to the locking lugs, with consequent premature or erratic bolt unlocking, being thereby prevented.

Abstract: A shell feeding system comprising an endless loop, nondisintegrating link lt 14 within a magazine 12 for moving telescoped shells into an extraction position where they are side stripped and transferred to a ram load position. A hydraulic cylinder 48 is used to incrementally index belt 14 placing a round into position. Another hydraulic cylinder 76 accomplishes the transfer of an extracted shell 16' to the cannon load position.