Showing papers on "Diffuser (sewage) published in 1971"

Speckle Removal by a Slowly Moving Diffuser Associated with a Motionless Diffuser

Abstract: A moving diffuser destroys the spatial coherence of laser light only partially when the integration time is finite; this can be expressed by the signal-to-noise (S/N) ratio in the observed illuminance, due to the residual speckle. The method can be improved by the use of a two-diffuser system of which one diffuser is motionless, the other moving. In this case, the integration time (or the displacement of the diffuser) required to obtain a given S/N ratio can be greatly reduced, allowing the use of a slowly moving diffuser. Moreover, the S/N ratio does not depend on the optical-system parameters, whereas it depends on these parameters when a single diffuser is used.

Method of and apparatus for disintegrating materials

Abstract: A disintegrator is composed of (1) a mulch plate with one or more raised diffusers composed of evenly spaced bars rising from the plate with spaces between them, and (2) one or more mulch bars each composed of a bar with teeth projecting from one surface spaced to pass through the spaces between the bars of the diffusers. The mulch bar is positioned to rotate with respect to a fixed location on the mulch plate so that the teeth will pass through the spaces between the bars of the one or more diffusers. The plate may be perforated or imperforate. In the preferred disintegrator, one or more narrow portions of the mulch plate in areas extending substantially radially from said fixed location are fabricated into diffusers. The bars and spaces of each diffuser are arranged substantially circumferentially of said fixed location so that the teeth of the mulch bar pass through them as it is rotated. The spaces between the bars of the diffuser extend through the plate, either as one long opening under the entire diffuser (which is the case when the diffuser is fabricated separately from the plate) or as separate openings (which may be the case when the diffuser is formed from the plate). The disintegrator is a multi-purpose disintegrator and is well suited for use in an implement such as an outdoor-area cleaner provided with a fan which sucks or blows leaves, twigs, etc. from an area such as a lawn, drive, parking area, etc. against the front face of the disintegrator where the teeth of the one or more mulch bars push them to, and through the spaces in a diffuser where they are disintegrated and go through the opening in the plate without further treatment. The implement is advantageously provided with a bag which catches the disintegrated material. The implement may be operated in any suitable manner. The mulch plate for a disintegrator used for this purpose is generally perforated so that the blower which sucks or blows the leaves through it can blow or suck a relatively uniform quantity of air through the plate at all times. There are various applications for the disintegrator.

Sewage disposal effluent purifier

Abstract: Liquid sewage, which preferably has been subjected to a primary sewage treatment phase to minimize its turbidity, is fed to a contact tank where it passes through a porous filter that removes any remaining solids, and then has ozone gas bubbled through it to oxidize impurities in the liquid and to remove objectionable odors. An ozone gas diffuser is mounted in the tank beneath the filter so that any excess ozone gas will pass upwardly through the filter to keep it purified. A plurality of ozone generators are used to supply the ozone gas continuously to the tank; and a stepper switch automatically and successively energizes the generators one by one in a continuous cycle.

Sewage treatment system

Abstract: A sewage treatment system especially adapted to be a conversion unit for existing septic tanks, comprising an inner tank to receive raw sewage, the inner tank being within the septic tank and spaced from the walls thereof with its upper surface open above the liquid line; with an air diffuser system delivering compressed air within the inner tank just above a slot along its bottom to aerate and circulate the influent sewage delivered into the inner tank, and also to draw activated solid portions settling from the clarifier zone in the outer tank toward the sludge zone at the bottom thereof, through the slot in the inner tank into the aeration zone therein for further aeration treatment, with a final V-notched weir discharge means attached to the outer wall of the inner tank, with or without a chlorinator, and finally with a float skimmer means that insures the return of floating solids from the clarifier zone to the interior of the inner tank for retreatment.

Centrifugal compressor diffuser

Abstract: The diffuser of a centrifugal compressor having an unshrouded rotor has boundary layer fences on the walls bounding the diffuser in advance of the diffuser vanes. These vanes are directed across the direction of flow of boundary layer air on the diffuser wall and curve into the direction of the diffuser vanes as they merge with the leading edge of the vanes.

Diffuser apparatus for pneumatic tools

Abstract: A diffuser apparatus to disperse a gaseous stream wherein the apparatus is formed as a single integral unit having an internally located supply passage, a gaseous exhaust passage surrounding the supply passage, a plurality of spaced apart annular openings communicating the ambient with the exhaust passage through the outer housing wall

Vacuum cleaner fan assembly

Abstract: A vacuum cleaner fan assembly consisting of a compressor and an electric motor. A diffuser housing is provided, comprising a ring of guide blades constituting a radial diffuser in which ducts are provided for bypassing the air in the axial direction. The guide blades are supported by sealing means between the housing and an appropriate lid.

Effect of various diffuser designs on the performance of an experimental turbojet combustor insensitive to radial distortion of inlet airflow

Abstract: Effect of various diffuser designs on performance of experimental turbojet combustor insensitive to radial distortion of inlet airflow

Diffuser with one or more attachment members for light guiding cables and provided with a light attenuating device

Abstract: A diffuser with one or more attachment members for light guiding cables, and provided with a device permitting to attenuate the quantity of light emitted by the luminous source.

Latch and hinge structure for diffuser of fluorescent light fixture

Abstract: A combination hinge and latch structure for the diffuser of a fluorescent light fixture, comprising at each end of the fixture two transversely spaced, transversely pivotable latch members on the housing of the fixture spring biased into engagement with two latch elements on the diffuser. The latch members are provided at their lower ends with transversely-outwardly-facing hooks and transversely-outwardly-facing cam surfaces which extend upwardly from the hooks to transversely-outwardly-facing notches in the latch members. The latch elements are engageable with the hooks to support the diffuser in a lowered position, and are slidable upwardly along the cam surfaces into the notches to support the diffuser in a raised position. When the diffuser is in its lowered position, one latch element of each pair can be disengaged from the corresponding hook to permit the diffuser to swing downwardly for access to the interior of the housing. Fingers on the latch members transversely outwardly from the notches therein are engageable with the diffuser to prevent unhooking of one side of the diffuser when the other side thereof is unhooked.

Air dryer/filtration unit

Abstract: 1,218,736. Adsorbent filter cartridge, DOMNICK HUNTER (ENGS.) Ltd. 8 April, 1968 [7 Jan., 1967], No. 1059/67. Headings B1L and B1T. A gas filtering cartridge comprises a transparent or transluscent casing 11 containing an adsorbent bed 14, a cylindrical diffuser 15 at the inlet end, a filtering medium 17 for retaining the dust, generated 'by the adsorbent, at the outlet end, and an indicator 18 which changes colour when the adsorbent reaches a certain level of saturation. The adsorbent may be silica gel, possibly with added manganese dioxide, copper oxide, cobalt oxide or silver oxide, which adsorbs carbon monoxide and/or activated alumina, molecular sieve or activated carbon to adsorb water or hydrocarbons. A non-reverse valve 13 prevents water vapour diffusing into the cartridge at the inlet end, before use. The outlet end could have a similar valve, or the cartridge is packed in an airtight container until required. The casing and perforate disc 19 are plastics. The cartridge may be disposable or is reactivated when required by hot air. The cartridge is used on the inlet side of a blower or compressor, in breathing apparatus, food processing, or the air suspension system of an automobile.

System and method for making multigraded tv masks

Abstract: A method for forming a multigraded negative by utilizing an arcuate shaped light diffuser of uniform thickness.

Metal cable terminal for light guiding cable

Abstract: A metal cable terminal for light guiding cable, particularly adapted for application to a light diffuser, provided with one or more attachment members.

Clean-operating baseboard heater

Abstract: A baseboard heater is provided with diffuser means having a series of apertures for causing heated air to the exit therefrom in a series of discrete upwardly flowing columns spaced from the wall against which the heater is mounted to reduce the tendency for the heated air to deposit entrained foreign matter on the wall. Preferred dimensional relations are disclosed for the apertures in the diffuser means to ensure satisfactory performance of the heater.

A Jet Flap Diffuser Ejector.

Abstract: : The use of a jet flap diffuser for recovery of ejector jet kinetic energy has been investigated in a two-dimensional experiment, utilizing an ejector which employs a Coanda inlet for ninety degree rotation of the primary flow. Performance is compared to a solid diffuser ejector of the equivalent power and channel width. The jet flap diffuser ejector appears to have an advantage over solid diffuser ejectors for the rapid application of additional thrust for control purposes, as well as for the utilization of engine power in the production of propulsive energy. (Author)

Device for aeration of a suspension or liquid, for example sludge or sewage water

Abstract: 1,247,395. Aerating liquids. STENBERGFLYGT A.B. 11 June, 1969, No. 29567/69. Heading B1C. A diffuser comprises a block 7 of open-cell elastic foamed plastics material the length of which is at least ten times its height, mounted on a rigid metal or plastics sheet base plate 1 with a cavity under the block between it and the baseplate. As shown the cavity comprises channels 2, 3, 4 formed in the baseplate with end plugs 8, 9, 10 of foam material. In other embodiments (see Figs. 2-4 not shown) the cavity may be formed by strips of plastics material cemented to the block and/or baseplate to provide channels or a single cavity the block being supported by a rigid perforated sheet; or channels cut out of the underside-of the block.

Computer cable shroud and air diffuser

Abstract: A computer cable shroud and air diffuser for efficiently utilizing conditioned air and for minimizing the loss of air circulation directed to a computer, having a square lower floor section or air diffuser tile juxtaposed to a plurality of floor tiles forming a floor slab or platform on which a computer is supported and at which location underfloor conditioned air is supplied. The shroud and air diffuser includes a rectangular upper section or air supply collar having openings enclosed by removable tabs whereby the unit is versatile in that a number of these tabs may be removed to direct conditioned air to desired predetermined locations of the computer and further including a plastic ribbon shroud for encircling cables directed from under the platform through the shroud and air diffuser to the computer which ribbon shroud is of a material which is pliable to take the configuration of the cables and can be hardened in said configuration and further being of the same material as the rectangular upper section of the diffuser for plastic bond to said upper section thereby preventing escape of conditioned air to undesirable locations of the computer to prevent waste of the conditioned air.

Improvements in or relating to light diffusers

Abstract: 1,242,331. Laminated light diffuser; injection moulding. IMPERIAL CHEMICAL INDUSTRIES Ltd. 23 Dec., 1969 [3 Jan., 1969], No. 476/69. Headings B5A and B5N. A light diffuser comprises a foamed core of clear methyl methacrylate polymer and surface skins of translucent opalescent methyl methacrylate polymer. The polymer may be a homopolymer or copoly (methyl methacrylateethyl acrylate) and the skins may include opacifying pigments. The diffuser may be made by injection moulding in a vertical flash mould. A charge of skin material is first injected into the mould, and before this has set, a charge of core material containing a blowing agent (which may be liquid or solid) is then injected, preferably through the same orifice, and the material is allowed to foam and set. Preferably a second charge of skin material is injected after the core material to avoid exposing the core on removal of the sprue. The core material is preferably injected at foaming temperature but at a speed and pressure that prevent foaming until the mould is filled, the mould cavity then being enlarged to allow foaming.

Liquid spray device with fixed and rotatable diffusers

Abstract: A floating aerator includes an axial flow impeller rotated by an electric motor and disposed within a tubular throat to pump a column of water from a pond upwardly through the throat and against a stationary or fixed diffuser positioned above the upper outlet of the throat. The fixed diffuser divides the column of water into a central core which passes through a neck portion of the diffuser and an outer sleeve which is deflected outwardly of the throat by an annular baffle encircling the upper end of the neck. The baffle extends outwardly from the neck in a generally horizontal direction to guide the deflected water in a relatively flat trajectory to cause the water to strike the surface of the pond with considerable force. A rotatable diffuser positioned above the fixed diffuser coacts therewith to sling the central core of water outwardly relative to the throat in a path above and converging downwardly into the water deflected by the baffle.