Abstract: A waste cleanup kit is disclosed comprising a box and a plurality of kit contents. The contents include an absorbent material, a disinfectant and a scoop for scooping up waste material and a scraper for scraping waste material from a surface. The contents further include at least one glove for use by an operator and an absorbent towel. The contents further include a germicidal handwipe and a plastic bag sized to contain a scoop together with waste material. The absorbent material and the disinfectant are disposed in a separate material container and a disinfectant container, respectively. Each of the absorbent material container, disinfectant container, scoop, scraper, glove, towel, wipe and bag are disposed within the box.
Abstract: A grinding mill apparatus is disclosed comprising a grinding mill having a feed end head and a discharge end head and a shell disposed between said heads and secured thereto for rotation with the head. A feed end bearing and a discharge end bearing are provided for supporting the feed end head and the discharge end head for rotation about a generally horizontal axis. The bearings include a bearing element which pivots with the heads with the amount of pivot proportional to the increase or decrease of charge level within the mill. A proximity probe is secured to a stationary surface and aligned with a target which is secured to the bearing. The proximity probe detects changes in gap size between the probe and the target and generates a signal indicating an increase in charge level or a decrease in charge level within the mill.
Abstract: An apparatus for controlling a hydraulic turbine is disclosed comprising a hydraulic circuit to control the positioning of turbine runner blades and a hydraulic circuit to control the positioning of turbine wicket gates. The runner blade hydraulic circuit comprises a solenoid valve for normal operation of the blades and a slow rate servovalve for moving the blades when the actual blade position differs from a desired position by less than a predetermined tolerance. The wicket gate circuit comprises a solenoid valve for normal control of the gates. A diverter directs flow from the solenoid valve to a flow rate control valve when the difference between the actual and desired position of the gates is less than a second predetermined tolerance.
Abstract: An adjustable draft tube is disclosed for a hydraulic turbine installation. The draft tube includes a pair of fabricated box piers which are positioned in a tailwater with the turbine outlet disposed between the piers. The piers are anchored to a tailwater floor and a powerhouse foundation wall. A roof is provided extending between opposing surfaces of the piers with an edge of the roof pivotally secured to the piers above the turbine outlet. The roof is pivotable between a first position with a downstream edge of the roof disposed beneath a predetermined low tailwater elevation and a second position with the downstream edge disposed between the low tailwater elevation and a predetermined high tailwater elevation.
Abstract: A pump is disclosed having a damped dynamic vibration absorber for attenuating pump vibration in response to a periodic disturbing force generated when the pump is in operation. The vibration absorber comprises elastic means, an annular mass and an energy dissipative means. The elastic means are arranged around the pump in a plane generally normal to the axis of rotation having one end secured to the pump and one end free to vibrate relative to the pump. The annular mass is secured to the free end and the energy dissipative means comprising a squeeze film damper is secured to the annular mass. The annular mass has a predetermined mass, and the elastic means have a predetermined stiffness and the squeeze film damper has a predetermined damping ratio such that the absorber generates a compensating force acting on the pump out of phase with a periodic disturbing force which acts on the pump and is generated while the pump is operated.
March 16, 1984
Date of Patent:
April 22, 1986
James H. Ball, Pradip N. Sheth, Keith E. Rouch
Abstract: A hydraulic turbine installation is disclosed for a site comprising a dam having a floor and opposing sidewalls defining a spillway. The installation comprises a frame member which slideably engages the spillway floor on a downstream side of the dam. The frame member is slideable transverse to a direction of water flow through the spillway. A hydraulic turbine and connected generator are carried by the frame member. The frame member is provided with an intake such that when the frame member is in a first position within the spillway, water flow through the spillway is directed through the turbine runner. The frame member is slideable to a second position with the frame member out of the spillway and water flow through the spillway uninterrupted. Power actuated means such as hydraulic servomotors are provided for sliding the frame member between the first and second positions.
Abstract: A warehouse system employs a crane guided for movement along an aisle with storage racks on opposite sides thereof and mounting a carriage for vertical reciprocation thereon. An extractor supported on the carriage has a pair of narrow extensible arms which engage the undersides of lips formed on opposite sides of a tote pan. The extensible arms each include three rails nested in one-above-the-other relation with the intermediate rail having vertical load bearing rollers engaging the upper and lower rails. A harmonic drive causes extension and retraction of the extractor arms through a chain and pulley arrangement. The tote pans are nestable and have ribbed bottoms cooperatively engaging cantilevered brackets on the storage racks whereby the pans are releasably detained in their stored position in the warehouse.
May 31, 1983
Date of Patent:
February 18, 1986
Michael D. Dushenko, Harvey R. Castner, Robert T. Baugh, Paul T. Shupert
Abstract: A method for manufacturing stay rings for a family of hydraulic turbine installations is disclosed. The stay ring comprises a plurality of stay vanes axially extending between two concentric ring members. Stay vanes are formed from flat plates and aligned circumferentially on the rings with radially outer leading edges presenting an intake angle acceptable for any turbine installation within a predetermined family of turbine installations. The vanes are sized such that their length measured from the leading edge to a trailing edge is such that the vane presents a discharge angle equal to a predetermined minimum discharge angle for the family of turbine installations for a given turbine installation. A desired discharge angle corresponding with a desired power output is predetermined and the trailing edges of the stay vanes are trimmed an amount sufficient for the stay vanes to present the desired discharge angle.
Abstract: This invention relates to a method in the operation of magnetic separators comprising a plurality of canisters or like devices (4) containing magnetizable induction poles (41) arranged to pass through a magnetic field (1). While the canisters (4) are located in the magnetic field (1), a particle suspension is supplied (5) to the canisters, in which magnetizable particles are attracted to the induction poles (41). Rinsing fluid (6) may optionally be supplied to the canisters while the canisters are still located within the magnetic field (1), thereby to remove non-magnetic particles through discharge means (7a, 7b) for fluid and non-magnetic material. Outside the magnetic field flushing fluid is supplied in a flushing station (8, 56), this flushing fluid removing magnetic material through discharge means (8, 57) for magnetic material. The canisters (4) are provided with flexible sealing lips (36) as disclosed in U.S. Pat. No.
Abstract: An arrangement at rotating shafts with a wheel fixedly mounted to the shaft, which wheel rotates in a housing surrounding the wheel, an essentially pipe-shaped element surrounding the shaft, an with essentially axially sealing surface provided sealing device between the pipe-shaped element and the wheel and a passage in the housing for the shaft with a sealing device, which seals against the pipe-shaped element. There is mounted a fastening device on the shaft for axial displacement of the pipe-shaped element in order to cause a sealing effect by means of the sealing device between the pipe-shaped element and the wheel. The fastening device is fixed in sealing position by a locking device.
Abstract: A draft tube for discharging fluid from a hydraulic turbine is disclosed as having a draft tube wall surrounding a discharge passage which diverges from a turbine runner to a discharge opening. The draft tube includes a first region downstream of the runner which has a rate of divergence less than that at which boundary layer separation occurs. A second region, downstream from the first region, has a rate of divergence greater than that at which boundary layer separation normally occurs. The draft tube wall surrounding the second region is provided with a plurality of orifices. A plurality of nozzles are provided on the draft tube wall surrounding the first region. Piping connects the orifices with fluid inlets of the nozzles. The nozzles have fluid outlets which communicate with the discharge passage in the first region and open away from the turbine runner. Fluid along the wall in the second region passes through the orifices and piping and into the nozzles.
Abstract: An apparatus is disclosed for admitting atmospheric air to a bounded volume of air on a downstream side of a crest gate where the bounded volume is defined by the gate and a curtain of water spilling over the gate. The apparatus comprises a plurality of rigid conduits secured to the gate and sized sufficient to have a first opening in communication with atmospheric air and second opening in communication with the bounded volume of air. The rigid conduits are secured to the gate and spaced along the length of the gate to divide the curtain of water flowing over the gate into a plurality of separate water currents. Permitting communication between atmospheric air and the bounded volume of air, the rigid conduits act to abate damaging vibration to the gate caused by the flow of water over the crest of the gate.
Abstract: A bushing seal for a compressor for compressing wet chlorine. The bushing seal includes a bushing surrounding a rotary member of the compressor. Opposing surfaces of the shaft and the bushing define a first restricted fluid passage in communication with the interior of the compressor. Opposing surfaces of the bushing and a compressor casing define a second restricted fluid passage in communication with the interior of the compressor. Opposing surfaces of the rotary member and the bushing define a pumping chamber for receiving a sealing fluid having an initial pressure in excess of a pressure of a process gas within the compressor when the compressor is not operating. The pumping chamber increases the pressure of the sealing fluid to a pressure in excess of a pressure of the process gas when the compressor operates. The outlet of the pumping chamber is in fluid flow communication with the first and second restricted fluid passages.
Abstract: A reversible two-stage hydraulic machine, or pump/turbine, is disclosed having a rotary shaft. A first-stage Francis-type runner is fixed to the shaft with a spiral casing surrounding the first stage runner for distributing water to the runner from an upper reservoir. Stay vanes and wicket gates in the first-stage casing direct water to flow toward the first-stage runner in a spiral path having a direction in common with the rotational direction of the shaft. Water discharging axially from the first-stage runner is admitted to axial openings of a second-stage Fourneiron-type runner. Water is discharged from the second-stage runner in a radial plane. Second-stage stay vanes surrounding the discharge of the second-stage runner direct the water to flow in a spiral path having a rotational direction opposite of that of the shaft.
Abstract: An apparatus is disclosed for mounting a rotational signal transducer on a rotary shaft where the transducer generates a signal proportional to the shaft's rotational velocity. The apparatus includes a gear mounted for rotation with the shaft. A support platform is rotatably secured to the shaft by a roller bearing. The roller bearing permits the shaft and platform to rotate relative to one another but prevents relative axial motion between the shaft and platform. A transducer is mounted on the platform and operably aligned over the gear and generates a signal as gear teeth pass the transducer. A torque rod pivotally fixed to both the platform and a stationary support restrains the platform from rotating with the shaft. The pivotal connections of the torque rod permit the platform to move axially with the shaft.
June 28, 1982
Date of Patent:
December 18, 1984
Richard L. Orner, Jr., Charles W. Smith
Abstract: Apparatus for uniformly grinding the peripheral surface of a kiln ring of a rotating rotary kiln to axial flatness includes a grinder; an electrical motor for continually driving the grinder; a pneumatic cylinder for urging the grinder against the surface of the kiln ring; a current transformer for sensing the magnitude of current flow to the motor; and a controller which compares the magnitude of sensed motor current to a set point reference of desired current flow to the motor and supplies pressurized fluid to the pneumatic cylinder at a pressure which varies as an inverse function of the difference between sensed current and set point references and maintains the current flow to the motor equal to the set point reference.
Abstract: A bushing seal is disclosed for sealing a rotary member and having a face portion which engages a stationary housing and the pressure of a sealing fluid admitted to the bushing urges the face portion against the housing with a force sufficient to prevent freezing of the bushing when the pressure of the sealing fluid is high. A valve is provided for bleeding sealing fluid from a side of the bushing opposite a side against which the sealing fluid is exerting pressure. The valve permits variable flow rate of sealing fluid to atmosphere with the flow rate an inverse function of the pressure of the sealing fluid. By bleeding off fluid, the valve causes a pressure drop across the bushing with the sealing fluid urging the bushing against the housing with an additional force sufficient to prevent subsynchronous whirl when the pressure of the sealing fluid is low.
Abstract: A system for purging the lubricating oil from the oil connecting lines (27, 31) and cooler (23) of an oil circulating system for a flooded type screw compressor (10) when the compressor (10) is shut down whereby the lubricating oil is forced into a reservoir (18) which is positioned within a heated enclosure (22) so that upon restarting the compressor (10) in extremely cold weather, cold stiff oil will not be present in the oil connecting lines (27, 31) and cooler (23), thus avoiding delays in compressor start-up.
Abstract: A discharge ring for a hydraulic turbine is disclosed for reducing noise and vibration emanating from the discharge ring. The discharge ring comprises an inner and outer ring separated by spacer ribs. A plurality of cavities within the ring are provided, filled with a massive granular material such as sand. Removable plates along the outer ring permit filling and emptying the cavities to reduce the weight of the ring and facilitate removal of the ring for inspection and maintenance.
Abstract: An apparatus and method are disclosed for the recovery of sensible heat from a hot tar-free gas produced in a coal gasification process and in combined-cycle power generation. The recovered heat is utilized to generate a flow of superheated steam which may be used in the gasification plant. The apparatus includes a first boiler and a superheater fabricated from materials susceptible to damage from thermal shock when a flow of the tar-free gas having a temperature in excess of a predetermined safety temperature is introduced to the superheater when it is dry. The first boiler, filled with a flow of saturated water, initially receives the flow of gas. Within the first boiler, the gas indirectly heats the water converting it to a flow of saturated steam and reducing the gas temperature below the safety temperature. The reduced temperature gas is passed to the superheater and the saturated steam is passed to the superheater.