Abstract: A method for chemically milling an etchable workpiece by exposure thereof to an etchant in order to mill selected etchant-active areas and thereby form a plurality of raised die elements separated and bounded by a plurality of recessed cavities is comprised of the steps of initially, partially etching the workpiece to form recessed die element precursors separated and bounded by recessed cavities, depositing a film of an etchant-resistant composition on the workpiece in at least selected ones of the recessed cavities, filling those selected cavities with an etchant-resistant filler and then subsequently processing the workpiece to form a die. The die is then completed by deposition of a film of a tribological composition, which may be the same as or different from the etchant-resistant composition, within those recessed cavities not theretofore bearing the etchant-resistant film.

Abstract: A cassette case adapted to be placed in the cassette recess of a video player/recorder. A cleaning ribbon is mounted in the case and is moved outwardly by tape-guides of the player/recorder to engage the video head and audio head of the player/recorder. To cause the cleaning ribbon to retract after the cleaning operation, there is provided a shut-off ribbon, operated by the drive spindle of the player/recorder, with the shut-off ribbon cooperating with the light/photocell already in the player/recorder. A tension ribbon is connected to the cleaning ribbon to move the cleaning ribbon out of engagement with the video playing/recording head and audio head to its retracted position.

Abstract: An improved gasket for a panel assembly to close an access opening for the wall of a wing mounted fuel tank in an aircraft. The gasket comprises a lubricant impregnated wire mesh material, having at its edge portions annular seal members, with the material of the seal members being impregnated in the mesh elements at the edge portions of the wire mesh material. The gasket is positioned between a clamping ring which is in bearing relationship against the panel and an edge portion of the wall of the fuel tank.

Abstract: A housing mounted to the side of a conventional rural mailbox by means of strap extending circumferentially around the mailbox. The housing has a signal flag movable between a down non-signalling position and an up signalling position. There is an elongate actuating rod extending between the front door of the mailbox and the pivot location of the signalling member. Opening of the mailbox door causes the actuating rod to move to a release position to permit the signal member to move upwardly to its signalling position.

Abstract: A turboprop engine having a variable pitch propeller driven through a speed reducing transmission. The engine has a compressor section with a low pressure component and a high pressure component. A flow control device is positioned between the low and high pressure components. During takeoff, air from the low pressure component is bypassed, and during cruise, the air from the low pressure component is passed directly through the high pressure component, thus obtaining improved matching of engine components for both takeoff and cruise.

Abstract: A modular thrust control lever assembly for manual pilot control of the forward/idle/reverse thrust operational modes of multiple engine aircraft and including manually manipulable pilot control levers (24L, 24R) each having a fixed lever portion (69L, 69R) and an integral crank (42L, 42R) mounted about a fixed pivot axis (44) and a radially extendable handle portion (85L, 85R and 26L, 26R) with the fixed pivoted lever portions (69L, 69R) and radially extendable handle portions (85L, 85R) being secured together by a slide assembly (70L, 70R) and a lever assembly (71L, 71R) having a roller (64L, 64R) movable in an arcuate slot (66L, 66R); pivotal inhibit means (48L, 48R, and 49L, 49R) for inhibiting motion of the roller (64L, 64R) within the slot (66L, 66R) when the engines are not properly configured; means (31L, 31 R, 60L, 60R, 58L, 58R, 55L, 55R) for disengaging said inhibit means when the engines are properly configured; a plurality of resolvers (30L, 30R) of opposite hand and disposed at different distanc

Abstract: There is disclosed a mobile cargo container for transporting fluid-like materials such as cannery waste. The cargo container includes a floor conveyor extending rearward of and beyond the container bottom for discharging materials from the container through a rear discharge outlet. A trailer door is connected to the container to pivot between an open position wherein the door is above the discharge outlet, and a closed position wherein the door seals the container in a fluid tight fit. The discharge outlet is defined by side walls of the trailer which are angled downwardly in a rearward direction from the top of the container to a point wherein the side walls project downwardly in a forward direction to meet with a bottom portion of the container.

Abstract: A thrust reverser blocker door assembly for a fanjet engine (34) wherein a plurality of blocker doors (10) are disposed aerodynamically about a peripheral circumferential zone of a central fan duct (46) of the engine in a cruise configuration and are pivoted radially into an annular ring interrupting the fan duct in a thrust reversing configuration for diverting air radially outward and forward through a concentric bypass duct (48), each of the blocker doors (10) being secured for pivotal displacement by an articulated linkage (50) comprising a drag link (62) disposed for arcuate motion about a fixed pivot point (64) at its proximal end, an overcenter link (12) spanning the blocker door (10) and the distal end of the drag link (62) at a longitudinally translatable pivot point (70), and a biasing member (100) for tensioning the articulated linkage (50) and the blocker door (10) radially outward about the translatable pivot point (70) when in the cruise configuration.

Abstract: A composite, lightweight, fire-retardant laminar structural panel (10, 10', 10", 30) of the present invention comprising: (i) a sheet-like central honeycomb core (11) formed of aluminum, paper treated to improve its fire resistance characteristics, or the like; (ii) upper and lower imperforate face sheets (15, 16) formed of lightweight fibrous materials impregnated with a phenolic resin; (iii) a pair of upper and lower phenolic adhesive films (18, 19) interposed between the honeycomb core (11) and respective ones of the imperforate face sheets (15, 16) for adhesively bonding the face sheets (15, 16) to opposite sides of the core (11); and (iv), a fire-retardant coating (20) comprising a copolymer of vinylidene fluoride and hexafluoropropene applied to at least the exposed surface of the lower face sheet (16).

Abstract: A lifting device adapted to lift an object, such as a metal block, having a threaded socket for engagement of a lifting device. The lifting device comprises a ring, to which is rotatably mounted a hub having three outwardly extending threaded studs of different sizes. The appropriate stud, having a diameter matching that of the socket of the object to be lifted, can be moved into the lifting position for threaded engagement with the socket.

Abstract: A unitary fastener insert (50) for structural sandwich panels (52) is comprised of a shaft (58) of a generally uniform circular cross section having a base (64) and a tip (62), a generally circular flange (68) extending radially outward from the base circumferentially peripheral the shaft, and a central stepped bore therethrough (72) including an enlarged fastener seat recess (78) disposed interiorly of the tip for receiving the head (90) of a fastener (54) merging to a reduced bore (82) for receiving the shank (94) of the fastener. The insert of the present invention is specifically configured for production by a forging technique, also described herein.

Abstract: An apparatus and method for cleaning a digitally encoded disc by moving a circumferential wiping surface in a circular path across the periphery of the disc toward the middle of the disc, and again outwardly toward the periphery of the disc. This is accomplished by having a gear drive connection between a rotatable disc support member and a rotatable wiping member positioned above and offset to one side of the support member. Rotation of the cleaning member causes a relatively slower rotation of the support member so that all parts of the disc are properly cleaned.