Abstract: A gun sighting rest having a support body of foam plastic material which is unitarily molded to have a base with front and back end spaced upwardly extending U-shaped rests or placement grooves for supporting and engaging the forearm grip of a firearm, such as a rifle or shotgun in spaced relationship. An elevation wedge also molded of the same plastic foam is provided for insertion under the front or back end of the base for adjustably elevating either end as desired. An interlocking tongue and groove friction engagement retainer is provided to adjustably retain the elevation wedge and the base of the gun rest together when in use.

Abstract: A snow making tower which includes an elongated tower conduit combination having an elongated air conduit extending within an elongated first water conduit. Air and first water discharge nozzles are respectively provided adjacent the upper end of these conduits for producing a plume of atomized water for external interacting air and water discharged under pressure from these air and first water discharge nozzles to produce snow in subfreezing ambient conditions. Multiple second water discharge nozzles are also provided adjacent the upper end of the tower and positioned for directing at least a portion of their water spray discharge for ultimate interaction with the plume. The air and first water discharge nozzles are detachably mounted in respective nozzle housings at the top of the tower structure. These nozzle housings are independently connected to the tower structure at its upper end with respective air and water metal connecting tubes.

Abstract: A vibrator for vibrating an object. The vibrator is provided with a rotary housing mounted on a frame for rotation about an axis. Multiple rotary eccentric masses are mounted at equally spaced intervals in this housing about the housing axis and they are mounted for rotation on their respective axes which are parallel to the housing axis. A rotary drive is connected for simultaneously rotating the eccentric masses in the same direction and in synchronism such that all masses are directed simultaneously to their inner most and their outer most positions of movement relative to the housing axis. This generates a force moment about the housing axis which rotatably oscillates the housing.

Abstract: The invention comprising an apparatus for evaporating water in a mixture of water and solids derived from the organic output from a waste water treatment plant. A low cost source of gaseous heat (as the exhaust from a gas turbine driver and in combination with an auxiliary combustor) is used for evaporating the water and safe conditioning the evaporated water vapor after being combined with the exhaust from the gaseous heat source. The solids portion of the organic output from the waste water treatment plant is segregated and safe conditioned separately.

Abstract: A resilient static seal for sealing the closure on a pressure vessel. The seal is provided with a curved cross section with the convex side of the curve exposed to the higher pressure which may exist within the interior or exterior of the pressure vessel. The seal is also provided with opposed inwardly curved side edges which engage the side walls and a bottom wall of a vessel closure seal groove in which the continuous seal is seated.

Abstract: A universal motorized scaffold truck with a horizontal support frame adapted for removably supporting scaffold or "A" ladders thereon and supported by wheels for lateral movement on a ground surface. A vertically extendable steering mast is provided which is secured at its lower end to the frame and adapted for steering selected of the wheels from the upper end of the mast. An electric motor is mounted on the frame and adapted for driving desired wheels and a switch is provided at the upper end of the mast for selectively engaging the electric motor to drive the truck in either direction. The steering mast is adapted to fold down horizontally for storage on the frame and may be locked into position in its upright position and secured to the scaffold or ladder for security.

Abstract: A stationary coal nozzle for a burner on a pulverized coal fired furnace having an elongated tubular nozzle with an inlet for receiving a flowing stream of coal/air mixture and an outlet for discharging the flowing stream into a combustion zone of a furnace for burning. A multiple of transversely extending rib segments protrude into the nozzle from its inside wall and are circumferentially arranged for distributing and diffusing a flowing stream of pulverized coal in the coal/air mixture upon exiting the nozzle outlet. A deflector plate may also be provided which closes off an upper portion of the nozzle inlet to prevent pulverized fuel roping.

Abstract: A combination question-answer book and a separate answer display for reading and displaying the answers to each question provided on the respective pages of the book. Microprocessor chips are secured to protruding ears extending from an edge of each page for being read by a digital microprocessor chip reader. Each microprocessor chip is programmed with answer information specific to the page with which it is associated and a portable handheld digital display reader may be positioned relative to each chip to respectively read the chips and display the respective answer information for each associated page.

Abstract: A pressure washer having a frame supporting a heat exchanger for heating liquid passing therethrough under pressure for delivery to a nozzle for pressure cleaning. A burner unit is positioned for applying flame heat to the heat exchanger for heating liquid in the heat exchanger and a blower is provided for delivering combustion air under pressure to the burner unit. A fuel pump is also provided for supplying fuel under pressure to the burner unit. The burner unit is modular and remotely mounted on the frame from the blower and is readily removable and connected to the blower unit remotely through a duct. The burner unit includes a burner gun contained in a removable burner throat housing having a base with an air inlet for registration with the duct and an outer flame port for exposure of the flame from the burner gun to the heat exchanger. The fuel pump for supplying fuel to the burner is driven directly from the blower.

Abstract: A portable snow making system for home use which is mounted on a wagon for easy portability. An elongated telescoping support pole is detachably supported from the base of the wagon and a snow making gun is mounted on the upper end of this support pole. Snow making nozzles are provided in the gun for ejecting air and water under pressure into the ambient subfreezing atmosphere for manufacturing snow. A high pressure water pump and an air compressor are also mounted on the wagon to provide sources of water and air under pressure to the snow gun. The snow gun is provided with a housing with a water inlet and an air supply tube passes through this housing for exposure of its exterior surfaces to the interior of the housing in order to warm the air tube and prevent freeze-up of the air tube and the air nozzle.

Abstract: The present invention pertains to a drill bit tip portion (3) comprising a drill bit body having an axis of symmetry (1). The drill bit body having lands (2) symmetrically displaced around the symmetry axis (1) has axial clearance faces (6) forming main cutting edges (5) and back edges (7). The main cutting edges (5) are connected with axial rake faces (4). The axial clearance faces (6) are crossed beginning from the axial rake faces (4) throughout the back edges (7) till the drill apex (9) by the oval cross section grooves (10) forming symmetrically central cutting edges (11). The central cutting edges (11), being connected to one another at a drill apex (9), are connected to corresponding main cutting edges (5). The corresponding surfaces of the grooves (10) are smoothly connected with the axial rake faces (4), and the central cutting edges (11) are smoothly connected with the corresponding main cutting edges.

Abstract: A snow making tower which includes an elongated tower pipe mounted on a support with a first water discharge nozzle adjacent the upper end of the tower pipe. A water connection is provided at the lower end of the tower for connection of a source of water under pressure to supply the water under pressure to the first water nozzle at the upper end of the tower. An air conduit coextends within the tower pipe with the bottom end of the air conduit extending externally of the pipe tower for connection to a remote source of air under pressure. The top end of the air conduit terminates within or inside the tower pipe adjacent the upper end where the air and water are then intermixed adjacent the water nozzle and then ejected through the water nozzle. An air nozzle may also be provided at the upper end of the tower for ejecting a stream of air into the ambient atmosphere under pressure into the throat of an air/water spray from the water nozzle or nozzles to further atomize the water spray.

Abstract: An economic snow making tower and method of manufacture wherein the snow making tower includes an elongated upright aluminum tower pipe which is mounted on a support. Snow making nozzles are provided at the upper end of the tower for discharge of air and water under pressure into ambient atmosphere for manufacture of snow in subfreezing conditions and air and water connectors are provided at the lower end of the tower pipe for the supply of air and water under pressure to the tower. The support includes a vertical ground support post and a steel T fitting as welded to this support cap and has three threaded connecting necks wherein the upper threaded connecting neck threadably receives the bottom end of the tower pipe and supports the tower pipe in its upright position. The air and water connectors are connected respectively to the two remaining threaded necks of the T fitting.

Abstract: A waste water treating system which has an incline pipe for passing waste water therethrough by gravity flow. This aeration pipe has tuyere perforations penetrating the pipe along a portion and a sealed jacket surrounds this perforated portion of the pipe. An access conduit is connected to the jacket for access to the interior of the jacket and an air fan is mounted at the upper in the access conduit for forcing air under pressure from its inlet into the interior of the jacket and through the perforation as tuyeres for agitating and aerating waste water passing through the perforated aeration pipe. Additional aeration may be accomplished by gravity flow of the waste water by connecting the downstream end of this perforated pipe to a vertical riser pipe for flowing waste water by gravity flow from an upper open end of the riser pipe to assist in further aeration of the waste water.

Abstract: A snow making tower including a vertical ground support post having its bottom end anchored into the ground and a tower support pole is coaxially mounted on this ground support post for free axial rotation thereon. An upwardly extending support arm is secured intermediate its ends to the upper end of the tower support pole for pivotal movement from horizontal to vertical. An elongated pipe snow making tower is provided with snow making nozzles adjacent its upper end and supply connections at the lower end for connection to remote sources of air and water under pressure for supply thereof to the nozzles for discharge into ambient atmosphere for manufacturing snow in subfreezing conditions. The elongated snow making pipe tower is pivotally secured intermediate its ends to the upper end of the support arm for pivotal movement in a vertical plane from parallel alignment with the support arm to positions below horizontal.

Abstract: A variable orifice dual gate valve having two opposed slidable valve gates in overlapping sliding contact relationship. Inner orifice edges of these plates coact to form a variable size orifice in the valve body upon simultaneously sliding of the valve gates in opposite directions through manipulation of a gear and screw drive mechanism. The gear and screw drive mechanism includes a handle drive shaft connected at an exposed end to a valve handle and a drive gear is secured to the other end of the handle drive shaft for axial rotation. This drive gear is meshed in driving engagement with two driven gears that in turn are respectively secured to drive right hand lead screw and left hand lead screw shafts. A right hand follower nut and a left hand follower nut are respectively threadably received on these lead screw shafts and gate slide drive shafts are in turn secured to these nuts respectively for follower movement with the nuts.

Abstract: The present invention pertains to RF (radio frequency) inductive coupling plasma (ICP) inductors having an actual primary winding (powered directly by an RF source) wound around a closed ferrite core, and a virtual closed secondary winding formed around this ferrite core in a plasma contained within a discharge chamber. The present invention enables one to maintain a uniform plasma with no limitation in process sizes and assumes a variety of embodiments. The simplest is merely an annular ferrite core having a primary winding (a few turns) which is placed into the discharge chamber filled with a necessary gas. The plasma sources based on the present invention can be applied in plasma processing technology: etching, deposition, ion implantation, abatement, etc. in plasma devices from ten Watts to a few kW, at an operating frequency from 100 kHz to a few MHZ, and at linear sizes from a few centimeters to a few meters.

Abstract: An interactive audience participation system which utilizes audio command signals, such as loudness or sound intensity, transmitted by different audience groups. These respective audio command signals are detected to determine the aggregate of the signals for each group and then the detected aggregates are converted into data. An audience sensed interactive communication medium device, such as a large stadium video screen, is correspondingly manipulated by the detected data so that the audience may play a competitive or collaborative game.

Abstract: An athletic shirt and backpack combination in the form of a vest of stretchable fabric having a back panel and a split access front panel with a conventional zipper closure and which snugly fits the upper torso of a body with a stretch fit. A backpack pocket panel of stretchable fabric is secured at its side and bottom edges to the back panel for providing a stretchable backpack pocket for containing objects with a stretch fit therein. Two horizontal wide straps of elastic material are secured across the front panel of the vest and connected to the side seams or side portions of the panel. The straps may be stretched and then connected with conventional hook and loop fasteners to securely hold the backpack with its load in position during athletic events.