Abstract: The invention concerns a system for controlling an aircraft propeller. A hydraulic motor controls pitch of the propeller blades. The propeller blades are characterized by the absence of feather-inducing counterweights. An overspeed governor senses when propeller speed exceeds a limit, and, in response, assumes control of the hydraulic motor and drives the blades toward a coarsened pitch position, which reduces the propeller speed. In another form of the invention, a mechanical brake can override the hydraulic motor and mechanically retard a rotating gear, which causes the propeller blades to move toward a coarsened pitch.

Abstract: An apparatus and method to provide confidentiality for the message content in copy received from an electrographic device is disclosed. Confidentiality is communicated to the apparatus by utilizing a confidentiality code mark on the first and last sheets of a set of copy for which privacy is desired. The confidentiality or non-confidentiality of the copy may also be communicated by using a last sheet of copy containing predetermined code marks. In one embodiment, the apparatus receives sheets of copy output from the elctrographic device and directs sheets of copy that are not confidential in nature into one output tray for removal. The apparatus directs sheets of copy that are confidential in nature into an assembly station for binding. After the last sheet of the confidential document is delivered to the assembly station, the bundle of copy sheets is advanced into a storage tray. The sides of the bundle of copy sheets are bound during its travel.

Abstract: A rotor for an air motor is constructed with a central, milled, aluminum disc having a peripheral flange to which is integrally molded an outer ring of epoxy compound or a composite material, the outer ring defining the series of buckets arranged in an annular ring which are driven by an air nozzle to rotate the rotor. The rotor construction utilizes a combination of old and new materials in a configuration designed to avoid rotor breakup under runaway speed conditions and minimize the damage should such breakup occur.

Abstract: A sheet material discharging apparatus includes a stopper member for stopping at least one edge of each of sheet materials sequentially discharged to align the discharged sheet materials at the edges; a sheet binder actable on a plurality of discharged sheet materials overlaid one another with the leading edges aligned by the stopper member to bind the plurality of the sheet materials; wherein the stopper member is effective to stop movement of the sheet materials in the direction of sheet discharge.

Abstract: A folding machine for both inside and outside three folding operations comprising a cutter drum (1) having a saw blade (1a) thereon, a folding drum (2) having saw blade receivers (2a), needles (2b), and folding blades (2c), a first holding drum (21) having holding devices (21a) and folding blades (21c), a second holding drum (22) having holding devices (22a), and raising devices (23) for preventing the interference of web A disposed in proximity to the saw blade receivers (2a) on the folding drum (2) so that both inside and outside three folding operations can be performed.

Abstract: The folded products are not completely creased across their width in a folding apparatus but, rather, leaving an open loop or bulge or end portion (101). A separating cylinder (100) includes gripper or holding elements (38-41) located spirally about the circumference of the cylinder, in groups, and axially shiftable, for insertion of the grippers, sequentially, into said open loop. After the first gripper moves to an insertion position, it opens the sides of the folded products for insertion of subsequent grippers or holding elements along the length of the folded sheet.

Abstract: A centrifugal compressor including a vaned diffuser provided with a plurality of stationary vanes disposed around an impeller for converting into kinetic energy of a discharged fluid into pressure. The diffuser further includes rotatable vanes unevenly distributed in the stationary vanes.

Abstract: A method of inserting supplements into newspapers or magazines (20) and a general method of opening newspapers or magazines prior to the insertion process entail separate newspapers being transported in open state through an insertion station. The spines of the newspapers are held in firm contact with pocketlike holders (14, 45) on a conveyor (10) and the holders (14, 45) are caused to temporarily open when they pass the insertion station (60, 61), the firm contact between newspaper (20) and holders being still maintained. Apparatus for performing the method comprises a conveyor (10) and an insertion arrangement (60, 61) with means (14, 21, 22, 23, 25, 26) to open each newspaper (20) and means (60, 61) to insert a supplement into the opened newspaper. The appartus may also include a second conveyor (40) with separate grippers (45) for each newspaper. The conveyor (40) extends through the conveyor (10).

Abstract: An improved plow construction for a signature printing system wherein a collating conveyor chain moves past a plurality of signature feeder stations which cooperatively build-up books on said chain and wherein a signature lifting plow device and a signature printer cooperate to effect printing on an inside page of signature. The improved plow device is constructed with a configured-sheet deflection element having: (i) a lead edge region located at an upstream position and extending generally radially below said conveyor chain; (ii) a trail end region located at a downstream position and extending generally radially from said conveyor chain, above said lead edge region and (iii) an intermediate section having a curved surface joining said lead and trail edge regions.

Abstract: A turbine engine includes axially adjacent compressor and turbine rotors which define a groove therebetween. Into the groove between the rotors radially extends an annular interstage seal assembly. The seal assembly includes a thermally insulative cellular wall structure which resists thermal and pressure included distortions. At its radially inner extent the cellular wall defines a seal structure in cooperation with the rotors, and also carries heat shield members on an axial fore disposed toward the turbine rotor.

Abstract: A method and apparatus of in-line die-cutting in saddle signature gathering wherein signature sets are gathered on a gathering chain to form signature sets. The signature set is grasped by a pair of belts which lift the signature off the gathering line so that a portion of the signature set along the spine thereof may be removed by a die-cutting pair of plates located above the gathering line. The signature sets may be stopped as lifting and cutting occurs. After lifting and cutting the signature set is replaced on the gathering line for further processing.

Abstract: The present invention relates to a compressor casing for a gas turbine engine in which an inner casing is radially adjustable so as to maintain a radial clearance between the casing and a rotor as the rotor undergoes radial expansion and contraction. The compressor casing has an outer casing and a concentrically arranged inner casing with a plurality of generally radially extending arms interconnecting the inner and outer casings. The volume between the casings is sealed so as to form a chamber and heated air bled from a downstream stage of the compressor is directed into this chamber such that the heated air contacts the exterior surfaces of the hollow radial arms. The invention also has a system for supplying cooling air to the interior of each of the radial hollow arms including a regulating device so that the cooling air can be selectively applied to the arms.

Abstract: A jam detector in an inserting station of an inserter comprises horizontal and vertical photosensors and therewith associated retroreflective targets; the horizontal sensors have a light beam directed across and above an envelope positioned in the inserting station, and the vertical sensors have a pair of vertical light beams directed toward opening fingers while the fingers are positioned in the inserting station for holding envelopes open. The jam detector detects jam malfunctions during the inserting cycle by sensing interruption of the horizontal beam and uninterrupted retroreflection of the vertical beams.

Abstract: A sheet sorting apparatus with a stapler includes a plurality of bin trays which are arranged substantially vertically with predetermined clearances between adjacent bin trays, which are inclined to provide an inclined sheet receiving surfaces and which are independently movable substantially in the vertical direction, wherein the bin trays are so disposed that those ends of adjacent ones of the bin trays which are closer to the sheet inlet are deviated when seen in a direction substantially perpendicular to the sheet receiving surface; bin tray shifting device for moving the plurality of the bin trays stepwisely substantially in the vertical direction to oppose the respective bin trays to a sheet inlet of the sorting apparatus; stapling device, disposed substantially on an extension of the inclined sheet receiving surface and having a stapling head movable to above the sheet receiving surface and an anvil movable to below the sheet receiving surface, for stapling the sheets interposed between the stapling he

Abstract: A sorter for stapling is provided with an arrangement of a plurality of sorting bins and a paper guide means which discharges the papers to predetermined bins. A stapling means is provided to move to the positions corresponding to the predetermined bins. The stapling means moves to a position corresponding to a bin in which are held the papers to be stapled among the predetermined bins, and effects the stapling process under the condition where the papers are held in said bin. The stapling number setting means sets the number of bins in which are held the papers that are to be stapled. A control means is provided which, after the papers are discharged to the predetermined bins by the paper guide means, causes the stapling means to effect the stapling process for only those papers that are held in the bins of a number corresponding to the number of said bins.

Abstract: A web separator is provided that cuts a web at predetermined separation locations. Downstream of the cutting, the web is folded at predetermined fold locations. A continuously swinging director, downstream of the folding, guides advancing sections of web to opposing fold edges of a supported zig-zag stack. The web is driven into the continuously swinging director by a driving member. The driving member is deactivated selectively by a clutch, while other elements of the separator continue to operate. A central drive motor may be interconnected with each of the drive member, swinging director, folding and support elements. Fold and separation locations may be determined by a bar code detector and selectively operable upper and lower conveyor belts may be disposed below the supported zig-zag stack.

Abstract: An apparatus changes a sheet stack 11, formed on a conveying element, in a sheet deliverer with continuous sheet supply. To divide the stack into a lower composite stack to be conveyed away and an upper smaller component stack, two pushers 17, 20 are provided, of which the first pusher 20 is an edge pusher having a cutting edge 22 which is directed at a perpendicular front edge 23 of the stack 11 and from which an air jet is delivered which lifts the stack corner, forming a gap for the introduction of the edge pusher 20. During the further advance of the edge pusher, the smaller stack is separated over its whole width from the rest of the stack, so that the second pusher 17, constructed as a surface pusher, can be inserted perpendicularly to the direction of advance of the edge pusher 20.

Abstract: The invention provides a method and apparatus for folding lengthwise and clamping a flexible binding, while leaving the edges of the clamped binding free to be separated such that the edge of a length of extensible netting may be inserted between the free edges. A progressive linear clamp is provided for progressively clamping the combined netting and binding material as the netting is inserted to thereby permit an operator to obtain a substantially uniform stretch of the edge of the netting material, and to apportion the netting evenly along the binding. With the netting material thus inserted and clamped between the edges of the binding, a feed mechanism is positioned to engage the combined binding and netting and feed it to a sewing machine to permanently secure the materials together.

Abstract: A method and apparatus provide for the personalization of magazines and like "book" publications. A book, having a cover which provides address information, is formed from a number of signatures. This is accomplished by automatically printing at least one personalized signature with variable personalized printing (such as by ion deposition), assembling the personalized signature with at least one other signature, detecting the personalized printing on the personalized signature (as by optically scanning OCR characters), and in response to such detecting, printing address information on the cover. The personalized printing can be the addressee's name, photograph, or identification number. The personalized signature may be assembled with other business documents, such as a business reply envelope, and may be perfed to provide a return form.

Abstract: A rotating impeller for stirring liquids contained in tanks. Strip-like blades of simple form radiate from a central hub, in swept-back configuration relative to the direction of rotation. The blades are angled relative to the hub so as to exert a forward and downward force upon the liquid as the impeller rotates, and the blade curvature is such that the area projected upon the liquid by the solid structure of the rotating blade is less than the corresponding area that would be projected by an otherwise similar blade in which imaginary straight lines connected all adjacent vertices, and any void areas lying within the boundaries of those imaginary lines had been filled in. The preferred arrangement of the blades is such that when the impeller is arranged with its axis vertical, curvature of each blade along its length is such that it extends away from the hub in a diminishing downward curve, reaches a lowest point, and then rises again before the blade tip is reached.