Abstract: A device comprises a cap formed by a body (4) provided with a base (8) which is biased outwardly by a spring (12) and carries an annular sealing element having a lip (10). The base is provided with a center orifice (14). Mounted on the outer face of the base (8) is a sealing element (20) which is also provided with a center orifice. A filtering element (18) is clamped between the element (20) and the lipped element (10) and closes the orifice (14) so as to substantially preclude the passage of the liquid while allowing the passage of air. The filtering element is formed for example by a tablet which may be partly protected by a thin and impermeable diaphragm (110).

Abstract: A filter for preventing the infiltration of contaminants into a kinescope envelope, includes a ring having a sloped surface to conform with the conical section of the kinescope neck. The ring also includes a support portion to which is affixed a non-oxidizable fluid permeative member. The ring is configured and dimensioned to rest against the inside surface of the conical neck section through a temperature range of approximately 20.degree. C. to 500.degree. C. so that fluid enters the envelope only through the permeative member. Specially configured clips remain resilient throughout the 20.degree. C. to 500.degree. C. temperature range to hold the filter in the conical section.

Abstract: A fiber bed element and process for removing aerosols from gas streams wherein a bed of fibers is packed to a desired packing density between two foraminous screens. A substantial portion of the fibers in the bed are positioned in a generally parallel arrangement such that the element can be mounted in an operative position with such substantial portion of the fibers extending in a generally vertical direction to enhance drainage of collected aerosols from the element to thereby allow-operation at even high bed velocities with reduced re-entrainment of collected liquid and thereby increase the total collection efficiency of the element. In the process, the bed element is mounted such that the parallel fibers extend in a generally vertical direction and the gas to be treated is passed through the bed at a predetermined velocity.

Abstract: A cylinder primary air filter element is coaxially disposed within a cylindrical shell between an air intake pipe and an outlet provided in the shell. A resilient secondary air filter element is deformably secured in an opening formed in a sidewall of the shell so as to be located outside the outer periphery of the primary air filter. The secondary filter element is secured in place by a filter element retaining plate which is arcuately shaped so as to be concentric with the primary filter element and is readily detachably attached to the shell. A sufficiently enlarged air flow passageway is thus defined between the outer periphery of the primary air filter element and the filter element retaining plate and consequently the resistance encountered by the air flowing through this passageway may be considerably reduced and the excessive bulging of the air cleaner may be avoided. A reed valve assembly is connected to the outlet of a housing which surrounds the secondary filter element.

Abstract: Gas filtration apparatus comprises a filter element mounted in a casing having an inlet and an outlet so disposed that gas flowing from inlet to outlet is constrained to pass through the filter element, an audible warning device operable by gas flowing through the inlet and means responsive to the difference between the gas pressure at the inlet and the gas pressure at the outlet and arranged to cause the audible warning device to operate whenever said difference exceeds a predetermined value.

Abstract: A distillation column packing in the form of a spherical body constructed by assembling a pair of hemispherical members of the same shape and structure. Each of the hemispherical members includes a suitable number of cutout openings formed in the hemispherical surface portion thereof to leave covering portions, a plurality of mating assembly posts and tubes formed in the hollow inside of the hemispherical member, and reinforcing and gas-liquid contact area increasing contact pieces formed to connect the posts and the tubes with one another but not to close the hollow inside of the hemispherical member. The packing thus constructed is best suited for use in distillation columns.

Abstract: A sheet of porous filter material folded into accordion pleats, the pleats having opposite edges folded over on diagonal fold lines to close the opposite edges of alternate pleats. The pleated and folded sheet is selectively disposed in flat panel form or formed into a tube with the pleats extending axially of the tube. When the filter is in its tubular form, the folded pleat ends are disposed at the exterior of the tube.

Abstract: An adsorbent unit including a container, adsorbent in the container, a resiliently flexible flap having a first portion attached to the container and having an aperture in a second portion thereof which is adapted to fit over a conduit, with the dimensions of the aperture and the conduit being such that the resilient flexibility of the flap will cause it to lock to the conduit in the area of the aperture.

Abstract: A filter suitable for filtering gases comprising a resilient foamed synthetic plastics filter element having a perforate support extending thereacross, and a peripheral resilient foamed synthetic plastics sealing frame, the edges of the element being located in a channel of the frame and secured therein by marginal portions of the perforate support extending into the frame.

Abstract: An air filter assembly is provided which comprises a multisided air filter panel and a multisided supporting frame therefor. The frame is of unitary construction and includes a foraminous center section, and a marginal section delimiting the center section. The center and marginal sections are in supporting engagement with one surface of the filter panel. The frame is provided with a plurality of peripheral sections which are foldably connected to the marginal section and cooperate with one another to delimit the center and marginal sections. Each peripheral section includes foldably connected first and second flange segments which are disposed in substantially face-to-face fold back relation. The first flange segment is foldably connected to a portion of the marginal section and extends angularly inwardly therefrom and forms an acute angle with the portion of the marginal section to which it is attached. A third segment is foldably connected to the second flange segment and extends angularly therefrom.

Abstract: A self-cleaning filter for a particulate-laden gas stream. A circular filter surface is positioned in the gas stream exhaust and includes a centrally mounted drive train. An elongate rotor transverses the face of the filter surface and is centrally coupled by a flexible joint to the drive train for rotative drive. Wheels mounted on each end of the rotor engage a circular track at the periphery of the filter surface; one wheel is spring biased to continually force the wheel at the opposite end of the rotor against the track. A vacuum cleaning head is associated with the arm of the rotor opposite the spring biased wheel to remove particulate matter collected on the filter surface.

Abstract: An improved turbine inlet screen for protecting the inlet to the turbine of an engine turbosupercharger and exposed to numerous substantial and rapid variations in exhaust gas temperature. The screen comprises a circular metal plate having an improved pattern of annularly arranged perforations providing radially non-linear mass relations from the plate center to its edge selected to reduce maximum thermal stresses, particularly at the plate edge, during transient gas temperature conditions.This invention relates to engine exhaust turbine inlet screens for protecting the exhaust turbine from the entry of potentially damaging foreign matter and, more particularly, to a plate type inlet screen having an improved pattern of perforations arranged to minimize internal stresses in the screen plate which are caused by the varying exhaust gas temperatures of transient engine operation.U.S. Pat. No. 3,286,459 Ephraim, Jr., assigned to the assignee of the present invention, discloses in FIGS.

Abstract: A hydrogen-purification filter has a closed chamber with a pure-hydrogen outlet. A coil made of thin palladium-alloy tubing is contained in this chamber and has an inlet end and an outlet end accessible from outside the chamber. This coil is of D-section so that in case a leak forms the turn of the coil containing the leak can be excised by cutting at the straight sections on both sides of the leak and the remaining coil rejoined at the straight sections.

Abstract: A replacable, sectionalized filter cartridge is received within a casing which is adapted to be inserted and removed from the nasal passage. The filter cartridge is preferably formed with two filter sections, one a nylon, cilia-like membrane, and one a polypropylene cilia-like membrane. If desired, in an alternate embodiment, a third honeycomb section separating the outer sections may be provided. The materials which form the outer filter sections are so chosen as to become electrostatically charged responsive to the movement of air thereby.

Abstract: A rigid foam hemisphere attaches to the air inlet of cylindrical convex air rigid foam straightener and to internal combustion engine to define air filter therefor.

Abstract: A compact nestable air filter of generally rectangular form comprising a frame formed of an integral suitable cut and scored blank of paperboard, which, when assembled, comprises planar frame members engaging a substantially sheet-form filter element therebetween, and having flared frame members disposed at an angle of less than 180.degree. permitting a plurality of frames to nest within each other, thereby reducing the bulk of the plurality of filters. The portions of the flared frame members may be connected together by several means, including glue flaps hingedly connected to one frame member and adhesively affixed to an adjacent member. In an improved embodiment a portion of the planar frame members on the bottom or downstream side of the filter is provided with an integral perforated cover sheet for retaining the filter element in place when subjected to an air current.

Abstract: A trough-type scale trap for use with a refinery or chemical plant reactor having a catalyst bed subject to plugging by fine particles. Compared to prior art traps, the trough-type scale trap of the invention is characterized by a larger volumetric capacity and screen area and is substantially easier to construct and to install or remove from closed reactor vessels than conventional traps. Its typical embodiment is as a series of parallel troughs having rectangular openings and disposed chordally across the reactor normal to the direction of flow. In one embodiment, the trough is a rectangular parallelepiped; in another embodiment, the substantially rectangular opening is reduced by tapering to a bottom significantly smaller than the inlet opening.

Abstract: A motorcycle spark arrestor comprising a cylindrical housing connectable to the motorcycle exhaust pipe and a screen positioned in the housing so as to intercept all the exhaust gases flowing therethrough, the screen including a planar, rectangular, central section positioned parallel to the longitudinal axis of the housing and contacting the opposite sides thereof, and first and second planar end sections made integral with the opposite ends of the central section and extending in opposite, parallel directions therefrom, at an obtuse angle thereto, the free ends of the end sections contacting the housing.

Abstract: A molecule separator comprising an evacuation chamber adapted to be connected to a vacuum pump, a pair of coaxially aligned input and output nozzles sealed within the chamber, the nozzles being formed of a single length of tubing having a transverse cut extending at least part way through the tubing so that the bore of the tubing communicates with the chamber, and means connecting the lengths of tubing on either side of the cut to maintain the cut sections of tubing in accurate axial alignment.

Abstract: A new filter structure is provided for removing particles from the exhaust gas of a large, single piston engine of low RPM, before passing the exhaust gas through a turbine for the purpose of driving a supercharger. The filter is so constructed as to be able to efficiently and reliably perform its filtering function over long periods of time in the high temperature environment of the piston engine exhaust. It comprises a cylindrical shaped housing having at one end longitudinally extending slits distributed around its circumference and at the other end an annular flange for mounting the filter in the exhaust line. The housing encloses a filter element comprising a hexagonal stacked array of cylindrical tubes and said filter element is retained in said housing by means of multiple resilient brackets, each formed in the shape of an open elongated loop so as to conform generally to the contour of the filter element on one hand and the inside of the housing on the other.

Abstract: An elongated tubular filter element prevents certain types of fluffy foreign matter entrained in an airstream admitted into the filter element from clogging the outlet of the tube during operation of a separator in which the filter element is installed. A major portion of the length of the tube tapers at a predetermined rate from one end, and a minor portion of the length tapers at a greater rate adjacent the other end of the tube to provide the tube with a flare at one end. The filter element is installed in the separator with its flared end down, so that the foreign matter falls freely through the bottom of the tube during operation of the separator or during cleaning of the tube.

Abstract: A sintered filter trap is adapted for insertion in a gas stream of sodium vapor to condense and deposit sodium thereon. The filter is heated and operated above the melting temperature of sodium, resulting in a more efficient means to remove sodium particulates from the effluent inert gas emanating from the surface of a liquid sodium pool. Preferably the filter leaves are precoated with a natrophobic coating such as tetracosane.

Abstract: A ram air filter for light aircraft comprising a parallelepiped housing and a replaceable filter element is disclosed. The housing comprises a base element and a cover element, which are injection molded of high impact plastic and are connected together in a snap-lock manner. The parallel faces of the base and cover elements include a plurality of ribs that define aligned apertures through which incoming air enters and leaves the housing. The ribs are formed such that they present a minimal amount of surface area to the incoming air stream during flight. A plurality of 90.degree. locking studs attach the housing to the air intake channel of the aircraft's carburetor. The replaceable filter element is also parallelepiped in form and lies in the space defined by the housing so as to filter the air flowing through the aligned apertures. The replaceable filter element is formed of a compressible foam, preferably having a porosity grade lying in the range of 20-50 pores per linear inch.

Abstract: A filtering attachment for the air intake of an automobile passenger compartment. A large rectangular sheet of laminated foil, vinyl and paper has a central opening over which is mounted a filter unit. The filter unit comprises two layers of non-woven paper heat sealed together to form a plurality of adjacent pockets, each of which contains pieces of activated charcoal. A fine mesh screen is mounted in overlying relationship to the filter unit. The attachment is mounted in overlying relationship to the air intake of the automobile so that all air entering the passenger compartment passes through the filter unit.