Abstract: In the liquid side of sewage treatment process, a combination aerobic/anoxic stage is closely monitored such that phosphorus can be removed as well as nitrogen. As in a known process, the aerobic/anoxic stage is monitored as to a coenzyme of the active bacteria. When the bacteria of flocs within this stage show a switch to anaerobic condition via such coenzyme, the low dissolved oxygen level in the stage is maintained for a preselected period of time or to a preselected extent of the anaerobic condition, before oxygen is added. This somewhat brief anaerobic condition within the flocs is sufficient to release significant amounts of phosphorus into the liquid. When aeration then is increased, enhanced biological phosphorus uptake is effected. A small aerobic stage is included after the aerobic/anoxic stage to ensure maximum phosphorus uptake, and in one embodiment this stage includes a membrane separator, allowing downstream secondary clarification to be eliminated.

Abstract: The cooking apparatus comprises a heat source within an enclosure, and a hollow chamber with an open upper and lower end which sits on or above the heat source. The hollow chamber together with the enclosure provide a cooking apparatus which has a bulbous, convex form. The chamber may be an accessory which can be removably attached to a barbecue, and it is preferably made from clay or metal. Optionally, skewers may form part of the apparatus, and they may be positioned vertically within the chamber to cook any food thereon. The skewers are preferably solid or hollow, and are longer than the height of the hollow chamber. A lid may be provided for the upper end of the chamber, and holes may be formed in the boundary of the upper opening to support the skewers. A vent may be provided in the lower region of the hollow chamber, or in the enclosure which is adjustable to regulate the size of the opening.

Abstract: A binding for a snowshoe has a base secured to a footbed connected to the snowshoe frame, and a tongue piece above the footbed, connected at front to the footbed in a flexible hinge and positioned to engage the top of a user's boot, from the toe to the arch. At each side of the binding, between the tongue piece and the footpad, lacing extends in zig-zag configuration from the front to the back of the binding, passing through lacing eyes and slidable through the eyes with relatively low friction, for drawing the tongue piece down onto the boot. At the back of the binding, a heel strap is positioned to extend around the heel of the foot, and this heel strap is connected to the lacing at both sides, such that when the heel strap is tightened via slip-through type adjustment buckles, this pulls on the lacing to tighten the lacing at both sides and snug the tongue piece down against the boot, firmly engaging the boot in the binding.

Abstract: A modular plastic conveyor belt has upright support members at ends of each row and, in some cases, at intermediate positions, to support a conveyor tier above such that the belt is self-supporting in a helical stack in a spiral conveyor system. Modular rows can be made up of one or more modules, and the modules can be in various different configurations. The support members or spacer frames are either integral or securely connected to heavier link ends in end members of the modules. Preferably there are teeth and notches in the support frames and the bottom of the end member of the tier above, to hold the tiers of the helical stack in registry, preventing sliding and misalignment.

Abstract: A portable construction layout tool generates laser beams in two or more directions related by a specific angle, such as 90°. The instrument emits two fans of light in such a way as to project a pair of lines on the floor, wall or other surface on which the instrument is mounted or placed, with the intersection of the two being visible rather than being a virtual intersection hidden beneath the instrument itself, enabling easier setup. Compared to rotating-beam instruments, the disclosed device is simpler by avoiding moving parts and provides for better visibility. In a preferred embodiment the non-collimated beam from a laser diode is used, and is passed through a cylinder lens to converge the beam on the narrower axis to generate the desired fan of light to be projected as a line.

Abstract: An underdrain filtration system has improved perforation structure, the perforations being positioned to admit the filtrate into a plenum defined by elongated underdrain rib structures of the system. Instead of drilled or laser-cut holes or slits, the slits are formed by stamping discs from the stainless steel plate, such that the discs extend parallel to the surrounding flat area but are raised just sufficiently to define a plurality of slits under each disc, preferably two to four slits, each being an arc of slightly less than 180°, 120° or 90°, respectively. A pair of metal bridges remain to integrally connect the raised disc and the surrounding flat field. Consistent perforation width is achieved, at, for example, 0.010″ width varying by less than 0.001″ in either direction, improving consistency of pressure drop.

Abstract: In a method of manufacturing a miniature multilayer device 10 a low open area dielectric layer 18 is selectively etched through to an underlying conductive region 16 using an electrically conducting medium such as a plasma 24. The endpoint of the etch process is determined by detecting the abrupt change in capacitance across the device 10 just as the final portion of the dielectric layer is removed.

Abstract: An electronic lock device includes provision for setting different bolt or latch extension lengths, to accommodate different door lock situations. In addition, the bolt or latch itself preferably is interchangeable for bolts or latches of different sizes or configurations, including switching a latch for a bolt or vice versa. The bolt or latch extension can be settable via a keypad or ibutton. In the preferred embodiments the lock units include a D.C. geared micromotor, which is also included in other electronic lock units disclosed.

Abstract: A process for treating and storing freshly cut pineapple greatly enhances flavor and increases shelf life. The freshly cut pineapple is first surface-disinfected. Its Brix and acid, and thus Brix/acid ratio, are measured or estimated. Then selection is made from batches of previously stored juice or other liquid medium, which may be pineapple juice from a different season or different part of the same season, or which may be white grape juice, acidified high fructose corn syrup, or blends. The juice or medium is selected to have a Brix/acid ratio which counterbalances that of the fresh fruit, so that the combined fruit/juice has a Brix/acid ratio of around 19. The cut pinapple, preferably chilled to just above freezing, is immersed in the selected juice and is stored and shipped, preferably close to freezing.

Abstract: The invention relates to a towing vehicle which moves on rollers or sliding bodies, for towing persons. The towing vehicle is provided with a motor drive which drives a driving wheel (1) that is mounted in a chassis (2). The towing vehicle can be controlled by the person through a steering column (8). According to the invention, the chassis (2) also has a supporting wheel (4) which is located behind the driving wheel (1). The steering column (8) is fixed to the chassis by a pitch joint (7) running parallel to the axis of rotation of the driving wheel (1), said pitch joint being situated in front of the axis of the driving wheel (1). The invention enables the towing vehicle to be used especially for towing inline skaters at high speeds.

Abstract: Disclosed is a windshield wiper protector which lifts up the wiper from the surface of the front window when car is stopping or parking through collaborated action of a car engine initiation switch, a motor, a relay, and two stage gear speed reduction so as to keep the wiper away from contamination and prolong its lifetime.

Abstract: Apparatus and methods for preventing overlap of coils on a cable of a rotatable winch drum have a rotatable roller which is mounted at a certain location with respect to the axis of rotation of the winch drum. The rotatable roller has an outer surface which is engageable with a side surface of the incoming coil of the cable as the incoming coil is being formed. The rotatable roller exerts a sufficient force through the roller and the body of the cable at the incoming coil to maintain the roller engaged portion of the incoming coil at the location of the rotatable roller and to shift all previously formed engaging adjacent coils of the cable sufficiently longitudinally on the surface of the winch drum in a direction along the axis of rotation of the winch drum so as to make room for the formation of the incoming coil directly on the surface of the winch drum.

Abstract: An adjustable wrench has a ratcheting feature by which its movable jaw retracts away from its fixed jaw when the handle is pulled in one direction, enabling the wrench to slip over the facets of a polygon-shaped nut, but which locks the jaws in position when the wrench handle is turned in the opposite direction. A jaw adjustment screw is positioned for rotation in the wrench head and is axially movable with the lower jaw, but only when a support wedge is slidingly retracted out from its normal position supporting the bottom end of the adjustment screw. The tool can have a ruled edge adjacent to the jaw for indicating jaw opening size. Another feature is a slidable fence device on the fixed jaw, to be moved slidably over a face of the nut when the wrench is in place, providing a stop against sliding of the wrench off the nut.

Abstract: A child's seat is especially adapted for mobile use in an aircraft. The seat has a support frame which can be fixed by a belt. A seat pan (9) and a back pan (10) are fixed to the support frame in an articulated manner. The lateral lower ends of the back pan (10) are displaceably accommodated in lateral guiding elements (15) of the support frame. The back pan can be fixed in an upright position by a fixing device and can be displaced in the guiding elements of the support frame once the fixing device has been released. The seat pan can be folded against the back pan and can be made of two pieces. The child's seat can be folded in a compact manner and can be packed in an aircraft in a space-saving manner. The child's seat can especially be used in a conventional passenger set in or against the flying direction.

Abstract: An underdrain filtration system has improved perforation structure, the perforations being positioned to admit the filtrate into a plenum defined by elongated underdrain rib structures of the system. Instead of drilled or laser-cut holes or slits, the slits are formed by stamping discs from the stainless steel plate, such that the discs extend parallel to the surrounding flat area but are raised just sufficiently to define a plurality of slits under each disc, preferably two to four slits, each being an arc of slightly less than 180°, 120° or 90°, respectively. A pair of metal bridges remain to integrally connect the raised disc and the surrounding flat field. Consistent perforation width is achieved, at, for example, 0.010″ width varying by less than 0.001″ in either direction, improving consistency of pressure drop.

Abstract: A laser beam projecting instrument primarily for construction purposes, and preferably self-leveling, produces four or five orthogonal output beams. The high-intensity central portion of a collimated elliptical beam from a laser diode is partially diverted by a beam splitter periscope device to produce one output beam, and the remainder of that central beam region is transmitted to produce another output beam in the straight-a-head direction. Two additional beams are produced from outer portions the beam's long dimension. In another embodiment, a five-beam instrument utilized two such periscopes in succession, thus producing three beams from the high intensity central region of the collimated beam.

Abstract: A mechanical lock and key includes an electronic access control feature for preventing opening of the lock unless prescribed conditions are met. The lock cylinder, preferably the cylinder plug, is fitted with a small ID or “serial number” chip which is read when a voltage is applied. A connected addressable switch is connected to a solenoid capable of withdrawing a blocking pin, when the switch is activated. The mechanical key has a key head with a battery, microprocessor and database. When the key is inserted into the lock, a one-wire bus connection sends the lock ID to the key's microprocessor, a comparison is made by the microprocessor to determine whether the lock is authorized to be opened, and if so; a code for the addressable switch, determined from the key database, is sent via the one wire bus to the switch, powering the solenoid, withdrawing the blocking pin and enabling opening of the lock.