Abstract: A method is disclosed which uses the Langmuir-Blodgett method to coat a substrate with multiple monomolecular single layers by immersing the substrate through a first layer of a first enclosure of a tank having first and second enclosures on a common subphase, and then withdrawing the substrate through a second layer in the second enclosure. The steps are repeatable to provide as many different single layers as required.

Abstract: A fuel leak detector for an aircraft system is shown as comprising a plurality of potential fuel leak sources where leaking fules are routed to a collector through a leak detector associated only with only one of the potential leak sources and the fule leak collector. Each detector permits the flow of leaking fuel into the collector, while at the same time maintaining a visual or other type of indication of the location of the fuel leak. Each detector comprises a small, light weight container which traps up to a predetermined amount of any fluid flowing through it. The level of the trapped fluid is indicated by a float. Fluid in excess of the predetermined amount flows through the container trap and into the collector. The contents of the collector are tested for fuel, and if fuel is detected, the maintenance personnel then search the individual traps for a visual indication of the location of the fuel leak.

Abstract: A disposable appliance for inhibiting the intake of food is disclosed. The appliance comprises first and second spaced pressure sensitive adhesive pads applied to the cheeks of a user at the corners of the user's mouth, the ends of one or more bands being connected to the pads. The bands are arcuate, so that they arch over the junction of the lips of the user. The appliance permits normal breathing and speech, while at the same time inhibiting the intake of food through the lips.

Abstract: The disclosed system produces liquid nitrogen from ambient air which is supplied under pressure to a membrane separator. Most of the gases other than nitrogen permeate the membranes, and are vented to the atmosphere leaving almost pure nitrogen gas. The nitrogen gas is then supplied to a Dewar container in the neck of which is mounted the cylindrical cold head of a miniature cryogenic refrigerator. The temperature of the cold head is maintained below the liquefaction temperature of the nitrogen so that the gas is liquified as it passes over the cold head in heat exchanging relationship.

Abstract: The invention disclosed herein comprises a hand held optical probe axially insertable into the fastener holes of a multilayered panel for measuring the gap between the edges of the panels at the hole site. The hand held probe includes a light source, two bundles of optical fibers for directing light axially into a fastener hole, the tip end of the bundles being directed at a right angle to the axis of the fastener hole so that the panel edges are illuminated. When the probe is at gap depth the light energy reflected from the panel edges is directed by a right angle prism through a lens system in the probe to a video scanning camera which provides an electronic video image of the gap size. A spring biased conical guide mounted on the housing of the probe, and through which the tip end of the probe projects serves to center the tip end of the probe in the fasterner hole.

Abstract: An improved deburring brush is presented which is useful in processing aerospace parts of considerable length and surface complexity. The brush includes a cylindrical hub for providing support during use. A multiplicity of brush elements of the channel strip type are attached at regular intervals around the periphery of the hub. Attachment is typically by use of retaining strips which hold the brush strips in lengthwise channels cut in the hub surface. Each brush element includes a longitudinal metal strip bent into a generally U-shape to form a rear wall and two converging sidewalls. Bristle fibers are then laid side by side in a row, then collectively folded at their middles around a core wire for insertion into the U-shaped channel which is then compressed so that the sidewalls press against the multiplicity of protruding bristles. Each bristle is flexible and has impregnated therein a plurality of abrasive particles. The outwardly extending ends of each bristle readily flex in the plane of rotation.

Abstract: An appliance for inhibiting the intake of food is disclosed. The appliance comprises first and second spaced adhesive strips applied above and below the upper and lower lips of a user and interconnected by lines, which may be elastic, and which provide relatively normal movement of the mouth to permit normal speech, while at the same time inhibiting, but not totally preventing the intake of solids and liquids.

Abstract: The disclosed apparatus provides a universal wheeled cart for carrying electronic devices to be stress tested in a sealed environmental chamber in which the temperature is varied between high and low limits while the power to the electronic components is being turned on and off. The cart is configured to substantially fully occupy the insulated heated chamber which is provided with tracks for the wheels of the cart. In addition to a front access door for admitting the cart, the chamber is provided with a rear rectangular aperture through which a novel rectangular bustle mounted on the cart extends. The bustle support a plurality of connectors through which power is supplied to the electronic devices. Complementary power actuated electrical connectors are mounted in fixed relation to the rear aperture, and when actuated, all power connections to the electronic components are made through the bustle and standardized busses on the cart.

Abstract: This patent discloses a playpen canopy comprising 4 universal mounting connectors which are readily removably attached to each of the corners of a conventional collapsible playpen of the type popularly in use. The depicted canopy is a dome shaped cloth fabric supported by two flexible poles which pass through elongated crossed pockets in the fabric. The poles are fixed to one another in the elongated pockets by means of a pivot extending through their centers. The ends of each pole are supported at diagonally opposite corners of the play pen by the 4 universal mounting connectors which are provided with latching means for securing the corners of the canopy thereto.

Abstract: A deburring method is presented wherein a cylindrical brush rotationally contacts the workpiece. The brush includes a mandrel having a central axle to provide support during use. To the mandrel is attached a multiplicity of long bristles. Each bristle is flexible and has impregnated therein a plurality of abrasive particles. The population density of the bristles on the brush is such that the outwardly extending ends can readily flex both in the plane of rotation and sidewise along the lengthwise dimension of the brush. Setting the brush so that the bristle ends overlap the surface of the workpiece being deburred, each bristle makes a slapping contact therewith. This results in one to two inches of each bristle being dragged endwise across the surface of the workpiece. The endwise movement of each bristle causes the abrasive particles imbedded therein to abrade the sharp edges of the workpiece. An automatic conveyor may be used to feed workpiece stock past the rotating brush at a predetermined rate.

Abstract: This invention discloses apparatus for controlling the throttle of an aircraft engine so that it is either in the fully automatic electronic fuel control mode or in the completely manual mode while using a single throttle lever. In the event of a power failure in the aircraft, automatic reversion to the manual throttle control mode of operation is provided. The apparatus for achieving this consists of an outer housing shell having a lever arm extending radially therefrom, the outermost end of the lever arm being pinned to a source of translational motion such as provided by a push rod attached to the manual throttle lever. Within one end of the outer housing shell there is an output spool having on its outward facing end a boring sized to accommodate the throttle shaft of the engine fuel metering system. An input spool is mounted for rotation within the second end of the outer housing shell. The outward facing end of the input spool is secured by a shaft to the electronic fuel control equipment.

Abstract: An approach is disclosed for accomplishing redundancy in the central processor units of a remote multiplexer terminal (RMT). Through execution of a stored software program the RMT receives data from input/output devices, processes that data and transmits it to external equipment. The system uses two central processor units (CPU's), each with its own input/output (I/O) bus. Both CPU's actively and continuously monitor the status of the I/O subsystems. The software program designates one CPU as the "Master", the other CPU as the "Slave". The CPU designated as "Master" performs active control functions so long as error detection circuitry within each CPU determines that the operational status of the "Master" is good. Error detection is accomplished by incorporation of a "Watch Dog Timer" in each CPU. A failing CPU is redesignated to be a Slave (and is halted) and the previously designated Slave CPU is redesignated as a Master.

Abstract: Measuring apparatus is presented which permits monitoring of current consumption of electronic equipment under operating conditions. The apparatus includes a probe-like element shaped to fit into the equipment fuse holder in place of the cartridge fuse and the cap which holds the fuse in place. A pair of test leads serve to encircuit the contacts within the fuse holder with the terminals of an ammeter. Subsequent to the completion of the monitoring act the probe-like element can be removed and the fuse and cap combination reinserted in the equipment.

Abstract: A printed circuit board modification and repair system is presented which functions under computer control. Modification is accomplished by securing the printed circuit board to an X-Y positioning fixture mounted on a work station table. After indexing to a reference point, the X-Y positioning fixture can be moved fore, aft and sideways by computer command to bring a specific location on the printed circuit board under any one of a plurality of heads mounted above the work station surface. One head will contain an etch cutting bit for making cuts in printed circuit connections. A second head has mounted thereon a laser beam discharge device for removing conformal coatings and wire insulation. A third head mounts a wire dispenser for making new conductive paths and a glue dispenser for securing the newly positioned wire to the board. A fourth head contains an ultra-violet lamp for achieving quick cures of glues and epoxy.

Abstract: Apparatus is disclosed for optically measuring the width of a gap between abutting panel surfaces of a multilayered structure that is to be assembled by bolts or rivets inserted through fastener holes. A scanning video camera having an optical image input and a voltage wavetrain output through a coaxial cable is used. The camera mounts on a rigid side viewing borescope which via sleeve adapters is inserted down the fastener hole under test. A fiber optic bundle within the borescope provides illumination of the test surface containing the gap. The information gathered by the video camera is displayed on a TV monitor mounted in a test console. Superimposed on the camera-obtained image is a pair of vertical cursors generated by a video electronic micrometer.

Abstract: A priority gating system is disclosed which is useful with a communication subsystem having a multiplicity of parallel input/output lines. To service these lines a priority address determination is made for all channels with 0 designating the highest priority and (n-1), the lowest in an n-channel system. Each signal line to the input/output devices will have a card select buffer serially inserted therein. All of the buffers will be enabled during the data transfer portion of the cycle. At the end of the service cycle for message transfer, the central processing unit initiates a dual pulse interrupt acknowledge command which first disables all buffers, then after a short delay, activates priority decoder circuitry. The priority decoder circuitry determines which of the n-channel input/output lines is to be serviced during the next data cycle.

Abstract: A deposit box for an automatic teller machine equipped with a deposit receiving chamber and an auxiliary or escrow chamber, both of which are provided with access doors communicating with the exterior of the box. Both doors are opened and closed automatically, by inserting and removing the box from the automatic teller machine. An internal door, communicating between the two chambers is provided, and the cover of the box is prevented from assuming a fully seated position unless the internal door is closed.

Abstract: A two-stroke cycle internal combustion engine has a sustained power stroke which results from delayed mixing of a stratified charge. Use of delayed mixing of an overall stoichiometric air-fuel mixture results in formation of a low amount of the oxides of nitrogen. Delayed mixing of a stratified charge is achieved by placement of a Helmholtz resonator cavity in the piston and peripherally just below the crown thereof. The Helmholtz resonator cavity communicates with the combustion chamber via a narrow slot made by undercutting the top edge of the piston. A port type intake valve is used. Pressurized air passing through the intake port during the exhaust phase of the cycle streams past the undercut top edge of the piston. After the engine cylinder has received a charge of fresh air the compression stroke is begun and the main chamber is filled with a slight fuel-rich gaseous charge. The companion Helmholtz resonator cavity receives only an air charge from the intake port.

Abstract: A single-bill currency dispenser incorporates a self-contained cartridge for storing a quantity of bills of a single denomination, and dispensing the bills singly in response to electrical control signals. The bills are loaded into the cartridge in a vertical stack of bills which may, if desired, be arranged in serial number order, and are dispensed one at a time from the top of the stack. The serial number of the bill next to be dispensed is visible through a window in the top of the cartridge case. A roller engages the topmost bill at the top of the stack and urges it forward to be received by a belt conveyor. Passage of a single bill through the conveyor triggers a switch to indicate that dispensing is occurring, and passage of two or more bills at the same time through the conveyor triggers a second switch, causing the bills to be ejected into an escrow tray.

Abstract: A compact automatic teller machine has an elevator assembly, a plurality of bill dispensers are located on one side of the elevator assembly for dispensing bills of one or more denominations to said elevator assembly, whereby the bills are made available to an operator at the upper part of the elevator assembly. A steel back plate assembly is provided with slides for supporting a front cover for sliding relationship relative to the back plate, and steel plates making up the back plate assembly, and the cover, define two separate secure compartments, for the bill dispensers and for a deposit box. Access to the sides of both secure compartments is permitted when the cover is opened. Multiple locking means is provided for locking the cover in closed relationship to the back plate.