Abstract: The invention uses a carriage that is longitudinally displaceable with respect to a cutting table, and a light transporting band whose width is at least equal to that of the sheets. The carriage is comprised of two separable movable members, one of which is motorized and comprises an image device for recording an optimized disposition of pieces to be cut out, while the other is towed and comprises a transversal clamping device into which is engaged a free end of the sheet. The towed member is coupled at its rear portion to the light transporting band, the latter serving to support and protect the sheet of patterned material when it is being drawn out.

Abstract: There is disclosed a sheet handling apparatus capable of stapling discharged for example from a copying machine in which stapling operation is prohibited in certain cases, for example if the desired copy consists of one page only, or if the sheet folding is conducted defectively.

Abstract: A kit for handling undersized signatures in a packer box having a signature feeding station, a main drum assembly, a delivery drum assembly and a continuous signature carrying chain. The kit includes a pair of register stop extensions adapted to be disposed in cooperative relation with spaced apart register stops. It also includes at least one guide roller extension bracket adapted to carry a guide roller which is removable from the bracket normally supporting the guide roller and is securable on the guide roller extension bracket for rolling movement relative thereto. The kit further includes a timing adjustment feature for causing grippers to release signatures at a point generally corresponding to the remote end of the guide roller extension bracket. With this arrangement, a packer box can be modified for handling undersized signatures.

Abstract: During the first pass across a field of row-planted sugar or red beets, the apparatus digs the beets from a specific number of rows (six being illustrated but the apparatus herein disclosed can be structured for four or five rows as well), elevates the beets at one side of the apparatus to a given height and discharges the elevated beets into a tank from which they are periodically re-elevated and discharged into a truck at the side of the apparatus opposite the side at which they are elevated and re-elevated, the truck trailing the apparatus over rows form which beets have been removed when not receiving re-elevated beets. On the next pass in a reverse direction across the field, the truck runs in the swath where the beets have been removed during the first pass, and the beets during the second pass are continually discharged into the the truck without resort to storage and without re-elevating the beets as done on the first pass.

Abstract: An automatic variable pitch propeller comprising a central hub defining an axis of propeller rotation and a plurality of blades connected to and extending from said central hub substantially normal to the axis of rotation, each blade being mounted for rotation about a pitch axis, means to translate outward movement of that blade resulting from centrifugal forces imposed on that blade by rotation of the propeller into a force tending to rotate that blade about its pitch axis toward a feathered pitch condition, the force being opposed by a feathering force acting at a center pressure of the blade offset from the pitch axis, caused by resistance to rotation of said propeller and tending to decrease blade pitch toward a feathered condition.

Abstract: The penetrating members (21, 35, 37, 38, 39) are disposed inside the cooling passage (8) at positions so as to penetrate through the cooling passage (8), and have both of ends thereof fixed to the rear side wall (17) and the body side wall (18). The projecting members (33) (34A, 34B) are disposed inside the cooling passage (8) so as to project from the rear side wall (17) or the body side wall (18). The rectification ribs (36) are disposed at intermediate positions between the penetrating members (21, 35, 37, 38, 39) or the projecting members (33, 34A, 34B). The penetrating members (21, 35, 37, 38, 39) or the projecting members (33, 34A, 34B) disturbs the main stream (3a) of the cooling fluid (3) near the internal partition (19) in both directions of the leading edge wall (16) and the first internal partition (19) and make the main stream (3a ) non-uniformly or causes its channelling.

Abstract: The baler has an internal chamber within which crop materials are coiled up into a cylindrical bale by fore-and-aft spaced-apart, oppositely moving web stretches, the forwardmost stretch of which is looped around a forward drive roll. A special bale supporting roller adjacent the bottom of the chamber keeps the bale from riding against the web wrapped around the forward roll. The support roll includes a cylindrical shaft and a plurality of resilient flaps extending tangetially outward from the periphery of the shaft. During baler operation, crop material tends to be carried downwardly by the forwardmost stretch into a zone located between the forward roll and the support roller, but is immediately ejected from the zone by the roller flaps and into the baling chamber, thereby preventing crop materials from wedging between the forward roll and the support roller.

Abstract: The turbine comprises orientable vanes or flaps (10b, 10a) respectively forming the distributor and a movable part of the volute of the turbine. These vanes are disposed in such manner that (a) the intrados (15) of one thereof directs the fluid which travels thereover in a path which is no longer in contact with the other, (b) the extrados (14b) of one of the vanes is travelled over by a fluid current which feeds the other vane and (c) the extrados (14a) of the other of the vanes is travelled over by a fluid current entering directly into the turbine only between its shaft (11a) and its trailing edge (13a). The turbine has application in the supercharging of engines of motor vehicles.

Abstract: A pump having a heat exchanger including a rotating baffle sleeve secured to the pump shaft. A seal baffle on the rotating baffle sleeve extends over the pump seal assembly cartridge. A cooling cylinder containing circulating component cooling water is suspended within the rotating baffle sleeve and defines a flow passageway therein for cooling heated product water, before the product water contacts the shaft seal. A seal injector distributor ring uniformly distributes seal injection water to the seal. A thermal shield in the heat exchanger reduces thermal stresses in the heat exchanger. A slotted keyway spacer ring facilitates replacement and alignment of a hydrostatic bearing.

Abstract: The vane of the impeller in a high-speed or mixed-flow centrifugal pump for the conveying of liquids which contain high or low concentrations of strands or strips of vegetable, plastic or other material has a convex inlet edge whose curvature increases gradually in a direction radially outwardly from the axis of rotation at such a rate that the resultant of the centrifugal force and the resistance encountered by a strip or strand at a particular point of the inlet edge is invariably tangential to the respective point of the inlet edge. This ensures that the strips or strands do not overlie and circulate with the inlet edge but are entrained by the resultant force to become separated from the vane. The stagnation paint of the vane in a region which is remote from the axis of rotation is disposed at the suction side of the vane; this also contributes to prevention of accumulation of strips or strands along the inlet edge.

Abstract: The invention relates to improvements to air propellers in so far as the profile of their blades is concerned. The law of evolution of the curvatures of the extrados 2 is the following: the curvature, maximum at the leading edge A, increases first of all rapidly to reach a value of about 4 at the point B at about 4% of the length of the chord, and then decreases regularly to reach a substantially zero value at the trailing edge F. The law of evolution of the curvatures of intrados 3 is the following: the curvature, maximum at the leading edge A, decreases first of all rapidly to reach a value of about 8 at a point D at about 3.5% of the length of the chord, then decreases less rapidly to reach a zero value at a point E situated between 10% and 60% of the length of the chord, decreases further to a slightly negative value and then remains practically constant as far as the trailing edge F.

Abstract: A signature feeder comprises an in-feed table for conveying signatures disposed in a stack adjacent one another and each in an almost vertical aspect to a signature separator operating to separate the signatures one at a time from the stack and transfer them to a signature elevator operating to raise them to an upper horizontal conveyor on which they are disposed in a partly overlapping shingle configuration.

Abstract: A variable displacement motor control responsive to the pressure differential across the motor, with provisions for reverse motor operation and for aiding load conditions.

Abstract: A carrier ring for a large diameter propeller system fabricated from a composite material having metallic blade mounting insert members in which are fastened roots of the propeller blades. The carrier ring has an annular ring member formed of a composite material which defines a plurality of radially extending openings, in which openings metallic blade mounting insert members are attached. The blade mounting insert members are retained in assembled relationship with the composite annular ring member by one or more fastening belts which extend around the circumference of the annular ring member in one or more grooves defined by the blade mounting inserts. The fastening belts may be formed by a plurality of turns of a fibrous filament, such as carbon filaments, so as to provide the necessary strength to retain the metallic blade mounting inserts in the composite annular ring member.

Abstract: A turbine ring comprises an annular support in two parts and a ring of ceramic sectors for sealing purposes. The two parts of the support are interconnected by an axial groove and a sliding male part. Each part comprises an axial annular groove in which is engaged a respective axial edge portion of each sector. The cooperating internal radial faces respectively of the edge portion and of the groove are circumferential, while the radially outer radial face of each sector comprises at least one flat zone. The corresponding face of each groove may be polygonal.

Abstract: Method and apparatus for delivering cooling fluid flow to the internal blade cooling passages in a gas turbine engine, wherein cooling flow is injected into a radial side face of the hub of the turbine wheel and is ported therefrom through internal passages in the hub to the blade internal cooling passages.

Abstract: A liquefied gas pump wherein a vessel contains a supply of liquefied gas which is pumped from its inlet to its outlet by a multi-stage upright centrifugal pump whose first stage is immersed in the supply of liquefied gas in the vessel. The shaft seal at the upper end of the pump housing is held out of contact with liquefied gas by a first flow restrictor above the last stage of the pump, an expansion chamber which is filled with liquefied gas and is located above the first flow restrictor, a gas collecting chamber between the expansion chamber and the seal, and a second flow restrictor which is disposed between the two chambers and prevents penetration of liquefied gas from the expansion chamber into the collecting chamber. The latter is connected with the vessel and/or with a gas collecting tank. The expansion chamber is connected with the second and/or third stage of the pump in order to ensure that it is filled with liquefied gas.

Abstract: A safety valve assembly for regulating the flow of a fluid under pressure to a fluid operated system e.g. a double acting cylinder element includes a housing with an inlet port, outlet ports and working ports and accommodating a pair of parallel valve spindles which are controllable by respective pilot valves so as to be shiftable between two valve positions. Each valve spindle is provided with a working piston, valve piston and a control piston which cooperates with a respective valve seat as defined by the housing. The control pistons of the valve spindles are successively disposed in a passageway extending between one of the working ports and one of the outlet ports.

Abstract: The invention pertains to a fan blade and a method for making a fan blade wherein the stresses within the blade material are substantially constant throughout the length of the blade and the unique construction of the blade reduces the concentration of loading on the blade material. Preferably, the blade is molded of a synthetic plastic material and includes a ribbed structure locating material offset from the concave convex configuration of the blade air flow portion such that the section modulus of blade sections from the air flow portion toward the root portion increases by increasing the distance of the blade material from the neutral bending axis in such a manner that no abrupt changes occur and the stresses imposed upon the blade material throughout its length are substantially constant.

Abstract: The invention concerns a method and an apparatus for the mixing of liquid or gas into pulp stock. In the method the pulp is fed into a centrifugal pump, into which, at the same time, the material to be mixed is fed into the zone between the center and the outer circumference of the rotor wheel. The apparatus is preferably provided with rotor blades consisting of two parts and with feed pins extending into the gap between the said parts.