Abstract: This face protecting mask is intended to be used in general medicine and more particularly in surgery. In its preferred embodiment, the mask has a shell or top portion provided with an elastic band fitted in the rear portion of the trim thereof; a downward front shield provided with an eye-window covered by a strip of a transparent flexible material and a mouth-opening placed below the eye-window and closed by a wad of filtering material; two side protection flaps connected to the front shield; two pairs of string for tying the mask; means for preventing mist from forming on the transparent window; and means for keeping the front shield away from the operator's face.

Abstract: The present invention is a locking mechanism to prevent relative axial movement of concentric machine parts. In this invention, opposing annular grooves in the concentric members create an annular recess across the interface of the concentric members in which a deformable ring sits. By this configuration, the deformable ring engages the annular grooves in the concentric members and mechanically inhibits the concentric members from relative axial movement.

Abstract: This invention discloses a particle separator adapted for use in a pressurized lubrication system for mechanical drives to separate debris particles from the fluid. Fluid tangentially injected into the housing impinges on the inner cylindrical wall in a manner which develops a downwardly directed spiral flow pattern, which generates a centrifugal force which firstly causes the entrapped gases to coalesce substantially in the center of the flow pattern and secondly selectively propels debris particles to the outer reaches of the pattern where the debris particles are segregated and trapped in a debris channel for subsequent removal from the system. A debris exit extends tangentially through the cylindrical wall. Apparatus for detecting and indicating the presence of debris particles, e.g. a magnetic particle detector, eddy current sensor, or optical particle detector, is preferably connected to the debris outlet. Outlets for the injected fluid and separated gases are also provided.

Abstract: A linear capacitance displacement transducer for measuring absolute displacement is formed from a coaxial variable capacitor and a precision capacitance measuring electronic circuit. The plates of the coaxial capacitor are attached to the members of an assembly whose displacement relative to one another is to be determined. Linear displacement of the members causes a linear displacement between the capacitor plates which is reflected in a linear capacitance change. A capacitor controlled oscillator utilizes the coaxial variable capacitor at its input. The capacitor controlled oscillator whose period of oscillation is been determined by the capacitance and locked in phase with changes of capacitance is utilized as a precision measure of capacitance. The period of the square wave output of the oscillator is a linear function of the capacitance of the variable capacitor at any time. The transducer may be adapted to determine the absolute position of a piston rod in a hydraulic cylinder.

Abstract: A failure protected optical fluid monitor is disclosed that uses, in combination, a single prism paired systems of light sources and light detectors to determine whether or not liquid in a container is present at a predetermined level. A pair of light sources and coordinated photodetectors are fitted behind the flat end of a conical prism and each light source is adapted to direct a beam of light through the flat rear surface of the prism onto an angled face of prism. If a liquid is in contact with the conical surface of the prism, most of the light is refracted at the prism's surface and exits into the liquid. Under these conditions the light detector are not activated. If no liquid is in contact with the conical surface of the prism, the light beams will be totally internally reflected at both conical surfaces of the prism and will exit on the opposite sides of the prism from the light source parallel to its initial direction. Each light beam is then detected by a photodetector.

Abstract: A diagnostic debris sensor operating on the inductive pulse is triggered by ferrous particles floating by or attracted to a permanent magnet within a pulse-sensing coil and the entire sensor at that, the pulse-sensing coil is equipped with a second winding for either continuous monitoring or an occasional push-to-test checking of the pulse-sensing coil.

Abstract: A cyclonic separator, for use in a fluid flow system, e.g., a fluid lubrication system for a mechanical drive, comprises a housing containing an inlet, a moveble shroud, and at least one variable area outlet. The movement of the shroud and its location within the housing is determined by pressure equalization of fluid phases within the housing. Movement of the shroud causes a change in the discharge area of at least one of the outlets handling the discharge of one of the fluid phases. Changes in the discharge areas promote a more definitive "stable" interface between the two phases thereby increasing the effectiveness of separation of one phase from another. Also debris can be separated from the fluid.

Abstract: The present invention is an improved removable gun sight for shotguns, rifles and other firearms comprising a single, light weight part for screwless, snap on attachment to the tubular part of a gun. The device is pocket size and portable and is easy to install and adjust on a firearm.

Abstract: An anti-torque system for use in a helicopter has an aft mounted horizontal fan submerged within a fuselage mounted, upward facing plenum. The fan operates off the mainpower source. The plenum has two controllable exit ports for counter torque control, fuselage pitch control and yaw control. The controllable exit ports are located along the longitudinal direction of the fuselage and each are substantially opposite each other. One port has a sufficiently sized area to effectively offset the torque of the main rotor while the other port has a sufficiently sized area to effectively provide autorotative yaw control. Both ports can be used simultaneous or singly.

Abstract: An arrangement of a standardized filter element for placing into a housing which is provided with an automatic bypass and with a pop-up botton type by-pass differential pressure indicator, selectively, and a set of at least two annular magnets positioned so as to form at the liquid flow entrance a chip arresting and detention gap among them and along their own peripheries and followed by the action along that of the filter element. One of the filter element sleeves and the grounded housing are utilized as conductors for the chip retention gap, leading to an electric connector for external wiring to a power source and indicating means.

Abstract: A portable, battery operated cobweb vacuum cleaner is carried on a human's back or shoulder thereby permitting use of both hands. Extension means and other parts have an effective internal diameter whereby cobwebs do not substantially adhere to internal walls. Also, the internal walls can be coated with materials which minimize the adhesion of cobwebs.

Abstract: This invention relates to a device for detecting electrically inductive particles in a fluid medium and is of particular use for detecting ferrous particles in the lubricant of an engine or mechanical transmissions thereby giving warning of malfunction of the engine or the transmission. The invention is of particular importance for the operation of an internal combustion engine, especially highly stressed helicopter and aircraft engines wherein prior warning of a malfunction permits corrective action prior to a catastrophic failure.

Abstract: An automatic stacking machine is disclosed. The machine is designed to stack pieces of cloth, prior to the use of the cloth in the construction of garments. A conveyor, having a plurality of bands, transports the cloth pieces to a horizontally reciprocal carriage that reciprocates from a position under the conveyor. Located below the reciprocal carriage, when it is in its extended position, is an elevator table upon which the cloth pieces are deposited and stacked. A plurality of wheels, mounted above the retractable carriage, in its extended position, turn in the direction of outward movement of the carriage. When the carriage changes direction and begins to retract, the wheels, which only move in one direction, pull the fabric off the retractable carriage and the cloth drops neatly down on the table below.

Abstract: An apparatus for removing entrapped gas in a fluid is disclosed. The invention is particularly useful in separating air from oil used in engines and transmissions. The inlet for the oil and air, the exit for the air, and the oil exit are all located at the same end of the invention. This facilitates its use in a variety of engine and transmission configurations. Oil enters tangentially at the top of a cylindrical housing and is caused to cyclonically work its way down to the bottom of the housing. The oil is then forced to reverse its flow and travel upward with a downwardly projecting shroud. The oil is forced to enter an oil outlet tube which is connected to the top of the shroud and which passes through the top of the housing. An air outlet tube projects downwardly from the center of the top portion of the housing. The oil outlet tube is located concentrically within the air outlet tube.

Abstract: A method for preparing and using a certain conditioning and passivation composition on metals and the composition of matter used for such conditioning and passivation, which method involves immersing the metal in a bath consisting of specified quantities of nitric acid, sulfuric acid and chromium trioxide in water. The treatment produces a clean and bright surface on the metal that is resistant to corrosion, without attacking the substrate metal. The passivation composition of the present invention can be used as a final passivation and corrosion removal treatment for stainless steel and as a corrosion removal and passivation treatment for other non ferrous metals.