Abstract: A sensing head for sludge detectors for use in effecting accurate sludge level detection in settling tanks, clarifiers, digesters, and the like, wherein the head that serves as the device probe comprises a cylindrical housing centered in its longitudinally extending axis and defining a reentrant indentation at one side of the head which extends toward the head other side beyond the longitudinal axis and defines a pair of opposed upper and lower housing walls and a gap therebetween, with such walls respectively having a light source and a light sensitive device, both separately lens covered, in electrically connected relation with the detector cable of, for instance, portable detectors, to which cable the head is separately connected, for make-break light principal operation when the head is submerged in use; the head housing has upper and lower end caps sealingly secured thereto, an elastomeric bumper mounted on the lower end cap to protect the head lower end and sides from damage, a lens guard mounted in the

Abstract: An accordian type folding door of the type disclosed in Holloway U.S. Pat. No. 3,233,147 in which each cover of the door is in the form of consecutive cover sections, connected to the door lazytongs in side by side relation, each of which cover sections defines a fold or pleat of the door and includes a pair of relatively wide slats of substantially equal width disposed on either side of a relative narrow slat, with such slats being pivoted together by inner and outer flexible sheets that are respectively adhered to the opposite faces of the respective slats; for each cover section of the door covers, the flexible sheets extend beyond the relatively wide slats thereof to define sheet end portions, with such sheet end portions of adjacent cover sections being clamped together by a spline that extends the height of the cover that the cover sections define.

Abstract: A scraper blade for use in cleaning conveyor belts, the blade including one or more laterally extending fracture slits provided in the rear face thereof, extending part way between the rear face and front face, the slits forming predetermined fracture lines to ensure fracture and removal of the tip of the scraping edge after wear to a given depth of the blade has taken place.

Abstract: A building corner arrangement for the outer wall of homes and other buildings that are formed from prefabricated panels made from concrete or other cementitious materials, which panels are of the type in which the panel end walls at each corner of the building outer wall are formed to define an angle that lies in the range of from about 0 to about 90 degrees, relative to the panel outside and inside wall surfaces defined by the panel, that results in the formation of, when two such panels are placed in the usual right angle relation to define a building outer wall corner, a groove or opening that, at the building corner in question, extends the height of such adjacent panels, which corner arrangement involves concrete or other cementitious material filling the indicated groove or opening, and shaped exteriorly of same to define a cornerstone-like configuration that may be similar to that found in the more expensive French Provincial style home, and including a method and mold for making the indicated building

Abstract: A liquid fertilizer applicator is provided, designed to be pulled by a motive power source, for use in a variety of soil and tillage conditions. It includes a disc-shaped coulter and an associated applicator knife mounted in trailing relation to the coulter, with a feed tube fixed to the rear of the knife. The leading edge of the arcuate knife conforms to and lies in close proximity to the outer periphery of the coulter disc. An alternative arrangement includes a knife with an angled lower facing edge and a heel extension to protect the feed tube opening.

Abstract: A water purification arrangement which uses as the water treating agent ionized oxygen allotrope gas in multiple (multivalent) ion charge forms (as distinguished from common chemical treatment substances), in which the raw material for practicing the invention is ambient atmospheric air, and specifically its atmospheric oxygen content. The arrangement provided has a gas flow path having multivalent oxygen ion allotrope forming sites that each include a magnetic flux field energy zone within the ambient air flow path characterized by interacting multi-polar magnets that exert flux fields across the flow path, and one or more elongate oxygen photolysis lamps enveloping the flux with ultraviolet light wave length ionizing electronvolt radiant energy emissions. The ambient atmospheric air is passed in a continuous flow through the flow path and then is conveyed to and is interspersed in the water to treated in a continuous flow application.

Abstract: A resiliently mounted dual wheel caster is provided which includes an outer body including a hub with a transverse aperture, and an inner body member pivotally mounted to the outer body and mountable to an article to be supported by the caster. A resilient shock absorbing member is disposed between the inner body and the hub of the outer body. An axle is disposed through the aperture in the hub and resilient wheels are mounted one each end of the axle. The resilient wheels and the resilient member act in series to effectively absorb shock encountered by irregularities in travelled terrain and prevent such shock from reaching the supported article.

Abstract: A gas compressor is provided having a source of supersonic velocity gases acting to accelerate inlet gases through a mixing region and diffuser. The inlet gas is introduced into the mixing chamber through a converging-diverging nozzle, causing said gas to accelerate to supersonic velocity. An injection of coolant is provided into the resulting gas stream to cause a decrease in its stagnation temperature and an increase in its stagnation pressure. Also provided is a means for modifying the nuclear spin orientations of the gases involved in the mixing region upstream of the combustion chamber to increase the stagnation pressure and decrease the stagnation temperature of the gas flowing into the combustion chamber. The gas compressor can be utilized in a jet engine for producing a flow of pressurized gases which may be expanded through a thrust producing nozzle.

Abstract: A conveyor belt cleaning arrangement consisting of a transversely disposed support which includes a plurality of connector slots. One or more elastomeric cleaner blades, either of the arm and blade type, include a locking means to releasably connect the blade to the support without the use of fasteners and secure the blade against lateral motion and hold the blade in position for cleaning the belt.

Abstract: An office furniture desk arrangement for providing a CRT work station, in which the desk includes a desk top that along the front of the desk defines a broad and flat work surfacing that extends between the sides of the desk under which a computer keyboard may be retractably mounted, and that along the back of the desk extends a relatively narrow trackway that also extends essentially between the sides of the desk, the upper surfacing of which is in substantial coplanar relation with the desk work surfacing. Underlying the desk top trackway is an easily excessed horizontal trough for concealing electrical wiring, with the trackway shiftably mounting a carriage for movement therealong that includes a rear casing that is roller equipped for riding along the trackway cantilever mounted fashion, and a front casing that is disposed over the desk top work surfacing and is connected to the rear casing for hand adjustment movement by the desk user toward and away from the desk user at the front of the desk.

Abstract: An improvement in labeling machines of the type disclosed in Wesley U.S. Pat. No.

Abstract: A motorized treadmill exercising device comprising a generally planar frame equipped with a planar slider bed and head and tail rollers journalled respectively at the head and tail ends of the frame, over which an endless plastic belt is trained.

Abstract: A bin level sensor that includes a diaphragm operated switch arrangement for sensing the level of material in bins, and containers, comprising a housing of disc-like configuration that is recessed on one side of same to define a diaphragm chamber over which a flexible diaphragm is secured that has a diaphragm plate applied to the inside surfacing of same and centered thereon which seats against and is centered with respect to a thrust shaft shiftably mounted in the housing; the thrust shaft includes one end against which the diaphragm plate acts and an opposite end against which is applied a swing arm that is adjustably spring biased against the indicated opposite end of the shaft and is operably associated with an off-on operating switch. The sensing device is mounted on the wall of a bin or container to expose the device diaphragm to the bulk material contained therein.

Abstract: A labeling device in the nature of an attachment for application to a labeling machine of the type disclosed in Wesley U.S. Pat. No.

Abstract: Methods and apparatus for the recovery of petroleum origin hydrocarbons from ground water tables at sites of refineries, oil and gasoline storage and distributing facilities, and the like. Pursuant to the invention, separate liquid handling devices, each in the nature of a vessel or canister and having liquid trapping and ejecting facilities that are free of mechanical pumping action, are employed for raising the ground water and liquid hydrocarbons that accumulate on the ground water table, respectively, through which the well or wells extend, and under the static pressure of the compressed air.