Abstract: A hydraulic filling device for filling control elements with a hydraulic fluid. The device has a tank that contains the hydraulic fluid and, a pump and the hydraulic control element to be filled is always provided with a filling connection and a ventilation connection so that the device is connectible to the filling connection of the hydraulic control element to be filled. The tank of the filling device containing the hydraulic fluid is connectible to the ventilation connection of the control element to be filled by way of a ventilation line.

Abstract: A front-loading mortar mounted on a base, such as the top of an armored vehicle, includes a weapon tube having a muzzle; a trunnion axis about which the weapon tube is pivotal for setting an elevation of the weapon tube; a cardan ring surrounding the weapon tube or cradle tube and being circumferentially displaceable about the weapon tube relative thereto; an additional pivot axis defined in the cardan ring at a location situated in front of the trunnion axis; and a loading manipulator, including a loading tray, for moving a round of ammunition to a loading location in front of the muzzle. The loading manipulator includes a loading rocker articulated to the cardan ring for pivotal motion about the additional pivot axis; an elongate positioner articulated to the cardan ring for pivotal motion about the additional pivot axis; and a bearing affixed to the base and receiving an end of the positioner for longitudinal sliding motion and pivotal motion therein.

Abstract: An improved velocity simulator which simulates the control movements of a large caliber gun barrel recoil and counter-recoil in a constricted chamber where there is provided a mechanism for controlling and checking the recoil and counter-recoil moving parts, in particular for controlling and checking the movements of the breech mechanism and the loading process. These movements generally have variable velocities and the control movements thereof can be interrupted randomly and without danger, which velocity simulator is adapted to be placed in operation whereby the gun barrel is adapted to be moved to its initial position by the velocity simulator against the force of a counter-recoil mechanism.The velocity simulator consists of a modular construction which connects hydraulically the driven control part and piston cylinder unit to a hydraulic power supply source whereby the control movement of a recoil and counter-recoil mechanism have an adjustable velocity, as well as a rapid operable movement.

Abstract: A testing and/or practice projectile assembly for preselected use in an artillery weapon in lieu of conventional live ammunition. The projectile assembly includes a casing which has an axial length which is less by a predetermined distance than that of the conventional live projectile. An insert member is operatively mounted in said casing. The length and diameter of the insert member is such that the exterior contour and total length of the projectile assembly (insert member and casing) corresponds to that of a conventional live projectile when the insert member is operatively mounted on the casing. The insert member has an annular recess and guide band segments are mounted in the recess. The guide band segments are pressed outwardly to conform to a predetermined exterior guide band diameter and can be selectively retractably released. A pull rod is coaxially connected to the insert member and band segments via a biasing cone so as to selectively release the band segments.

Abstract: A muzzle loading mortar constructed for mounting on a protected enclosure, for example, an armored vehicle. The mortar includes a mortar tube having an open end for receiving and discharging a projectile, and mounting means, including a tube cradle connected with a recoil-return means, are provided for mounting the tube on the enclosure. The recoil-return means includes a hydraulic member which cooperates with a spring for reducing the forces introduced into the enclosure during development of a shot from the mortar. A loading means is mounted for relative movement between the open end of the tube and the protected enclosure for muzzle loading the open end of the tube with a projectile. The loading means can be operated from within the protected enclosure to load a projectile into the mortar tube.

Abstract: A dental chair has its backrest connected to the seat by a scissor linkage arrangement which effects the moving together of the contiguous portions of the backrest and seat concurrently with movement of the backrest from an upright to a reclined position.

Abstract: A legrest for a dental chair has a telescopically nested section. A cable and pulley system automatically extends the nested section from the legrest as the legrest is moved from a generally vertical position to a generally horizontal position. Bias springs return the section to its nested position as the legrest moves back towards its near vertical position.

Abstract: A tilt-equalization arrangement for steep angle firing guns. The barrel of the gun has secured to its rear end a ball pin which is swivelably mounted within a ball socket. The ball socket is secured to a base plate. Forwardly of its rear end the barrel is provided with at least one longitudinally adjustable aligning post. The aligning post is slidably movably mounted on a circular ring segment forming a guide rail for the aligning post. This guide rail is vertically adjustable at its opposite ends so that it forms an adjustable leveling plane for the aligning post, with the ball pin forming a fixed support point and also being situated at the center of the circular ring segment forming the guide rail.

Abstract: A tank mortar having a magazine receiving a plurality of fin-stabilized projectiles which can be selectively aligned with the barrel. The barrel is movable relative to the magazine to enable sealing engagement of the barrel with the selected magazine chamber. The weapon frame which rotatably receives the magazine has an upper portion in which the bottom of the barrel is axially shiftable, e.g. by a bayonet arrangement, and a lower portion which sealingly engages the bottom of the munition chamber which is aligned with the barrel includes the firing element which triggers the displacement of the projective from the round chamber through the barrel. The base of the weapon frame is also provided with a ball received in a socket which is shiftable to traverse the weapon.

Abstract: A device is disclosed for guiding rifle cartridge cases during the loading and ejecting processes, thereby facilitating the two processes.