Abstract: The color balance of photographic printing paper is determined by making three successive exposures of the same portion of a sample sheet of photographic color printing paper. Two of the exposures are made through a neutral-color optical wedge of linear density gradient. The third exposure is not made through the wedge. Each exposure consists essentially of a different primary color of light of predetermined intensity and duration selectively to stimulate each of the three color-sensitive emulsion layers in the printing paper. The composite image produced upon development provides a means for visually matching a known color standard such as a neutral gray card to a definite small area of the print produced. The position of the discovered matching area of the print relative to a central point of the composite print, such central point being automatically demarcated in the procedure, provides a direct correction to the trial color analyzer printing program to produce a fully corrected printing program.

Abstract: A double beam photometric flow cell for high pressure liquid chromatography having illuminated sample and reference passageways therein, the sample passageway receiving flowing fluid sample fractions for analysis. Regulating apertures control the relative amount of light passed through the passageways such that the light energy through the reference passageway exceeds that through the sample passageway. This reduces the contribution of the reference path to "shot noise" in the photometer output signal.

Abstract: In such batchwise production of a paving mix of mineral particles and bituminous binder, in which a coarse-grained portion of the mineral aggregate batch is first introduced in measured quantity into a container and then discharged through a discharge opening in the container, controlled by a discharge door into an asphalt mixer where the coarse-grained portion of the mineral aggregate batch is mixed with a batch of binder, whereupon the remaining, fine-grained portion of the mineral aggregate batch is introduced in measured quantity into the container and then discharged through the discharge opening into the mixer the time needed to discharge the fine-grained portion of the mineral material batch is controlled.

Abstract: Screw feeder or Archimedian screw for pasty materials, such as soap, wherein the winding angle of the screw ranges between 15.degree. and 25.degree., and the screw height, diameter and thrust length depend on the section of bar extrusion and/or free passage area of the refining holes.

Abstract: A method and apparatus is provided for obtaining mixtures in predetermined proportions of a primary liquid and secondary liquid while the stagnation pressure and mass flow of the primary liquid are varying. The apparatus comprises a passive device having a passageway extending therethrough. A first section of the passageway for receiving the primary liquid has a decreasing area. A second section of the passageway for receiving the secondary liquid has an area substantially equal to the minimum area of the first section.

Abstract: A continuous conveyor composting apparatus to provide a method of completely mixing semi-solid sewage sludge, compost material and refuse into a non-compacted, readily compostable material. A variable capacity mixing chamber is provided to receive a partially mixed product from several hopper bins which are equipped with variable speed auger systems. The mixing chamber is equipped with a compost-throwing member which mixably engages the product to lift, separate and fluff the material.

Abstract: Apparatus for mixing particulate material carried in separable containers or process modules rotated with the longitudinal axis thereof at an angle other than 90.degree. to the axis of rotation thereof so that the container rotates asymmetrically with respect to the longitudinal axis thereof. The containers have mixing or process bars rotatably mounted therein and extending also at an angle other than 90.degree. so as to be horizontal when the container is in position for asymmetrical rotation during mixing operations. A docking station of the apparatus has a column connected to the drive shaft at the angle other than 90.degree., an upper arm and a lower arm which is connected to the column and to actuators which tilt the lower arm from a horizontal, container receiving position to a position essentially parallel to the upper arm for clamping the container therebetween.

Abstract: The mixing of liquid and liquid suspensions in vessels is obtained by a mixing impeller mounted on a shaft and rotated by a drive which delivers selected speed and torque. The torque and power needed to obtain given flow is minimized by a low-cost impeller having a plurality of blades, each formed from a plate of constant thickness except for a leading edge of rounded profile. Each blade has camber which decreases from the tip to the base thereof. The base can be flat to facilitate the attachment of the blades to the shaft. The blades are oriented and twisted to be at the threshold for flow separation along the width of the blades from the leading to the trailing edge thereof, thereby providing maximum flow in the axial direction before the onset of flow separation.

Abstract: An electronic watch having a case and a case back, a digital display, an integrated circuit, a battery and a fixed photo-electric pick-off placed on the module facing a window. The pick-off is for preference a photo-diode and its functioning is controlled by obstructing with a finger the window so as to prevent the ambient light from lighting the pick-off. According to the invention, the control system of the watch has the advantage of being insensitive to electrical parasites, of consuming little current, of being only slightly dependent upon the intensity of ambient light and of being simple to fabricate.

Abstract: A whole body swingable clock wherein a clock body itself swings. This whole body swingable clock includes: a clock body swingably supported on a pendulum fulcrum and solidly secured thereto with a clock mechanism case housing therein a movement case; and a stationary receiving plate provided thereon with a magnet or a driving coil to be electromagnetically connected to a driving coil or a magnet provided on the movement case for generating a swinging driving force in the clock body. In this whole body swingable clock, the stationary receiving plate with the magnet or the driving coil is housed in a space formed in the movement case, whereby the clock body can swing with the stationary receiving plate with the magnet or the driving coil being hardly exposed to outside from the clock body.

Abstract: An electronic timepiece has a reference signal generator for generating a 1/10 seconds reference signal which is fed to a static counter which counts the 1/10 seconds reference signal and produces a reference count signal. A read only memory stores a system program which executes and controls a time count. An arithmetic and logic unit executes the time count and a random access memory stores the time counting data. A bidirectional data bus line is connected between the random access memory and the static counter, and a decoder is connected to the bidirectional data bus line for decoding the contents of both the random access memory and the static counter and providing corresponding decoded time data signals. A display device responds to the decoded time data signals and indicates the contents of the random access memory and the static counter.

Abstract: A watch assembly is disclosed which includes a watchcase that has frames along opposite sides which define the perimeter of the watchcase platform on which is mounted a crystal having at least one opening which receives a rocker switch for controlling watch functions. The recess formed by the opening in the crystal when the crystal is attached by adhesion substantially to the entire top surface of the watchcase platform has at least one hole at the bottom of the recess to provide for the rocker switch to have access to at least one switch contact inside the case. The rocker switch includes a manually-operated actuator arm disposed in the recess and having at least one projecting leg extending through at least one hole in the platform in the watchcase to actuate at least one switch contact mounted on a timekeeping circuitry module inside the case.

Abstract: A device is provided which simulates heat transfer into a flexible pouch in which food or like product is cooked and sterilized. The simulator is a block of polymeric material having a thickness approximately that of a food pouch and a thermal diffusivity generally equal to or slightly above that of food product. A thermal sensor is disposed centrally within the block of polymer material and is connected to electrical leads extending externally of the retort to apparatus that records temperature change as a function of time. A plurality of simulators are placed at various regions in the retort, and the uniformity of the heat transfer under certain operating conditions is determined by measuring the heating rates of the several simulators. Operating conditions, such as flow rates or location of introduction of water, steam and air are changed until a sufficiently uniform heat transfer environment is achieved.

Abstract: The present invention provides a thermal imaging method to evaluate the surface and subsurface properties of a material and is based on techniques of optical beam deflection thermal imaging. The invention uses a localized excitation source, such as an optical beam, to provide localized heating of the sample surface. A surface thermal gradient is induced on the sample surface as heat flows, in three dimensions, from the area of localized excitation into the test material. The surface temperature gradient causes a thermal refractive lens to be generated in the fluid (gas or liquid) adjacent to the sample surface. An optical probe beam is directed through the thermal lens and is deflected by changes in a refractive index of the thermal lens. Changes in the refractive index are induced by variations of the surface temperature. In this manner, a detailed surface temperature profile can be generated which reveals surface and subsurface properties of the material tested.

Abstract: A temperature indicating device comprising a series of liquid crystal cells each of which contains a liquid crystal material having a different composition, the composition varying from cell-to-cell, and each of which cells exhibits the grandjean state whereby temperature is indicated by iridescence of the cells, the cells being such that the liquid crystal material in each has a clearing point at a different selected temperature in a series of temperature in a temperature range of interest and that each of the cells is such that its liquid crystal material does not revert immediately to the grandjean state on cooling from the isotropic liquid state wherein the improvement comprises the cells having a construction such that the liquid crystal material of each cell undergoes, on cooling from the isotropic liquid state, the transition isotropic liquid state to focal conic state, without reverting immediately to the grandjean state.

Abstract: In the manufacture of diamond bearings consisting of a supporting plate/ring having a plurality of recesses equally spaced therearound with insert members consisting of hardmetal or carbide studs, with planar faces of polycrystalline diamond, positioned therein, the diamond bearing faces are made co-planar by placing metal pads, preferably of brazing metal, in the bottom of each recess before insertion of the bearing studs, placing the assembly with the bearing faces on a smooth planar support, heating the assembly to a temperature at which the metal pads soften or melt and allowing the metal pads to extrude around and braze the bearing inserts in place. When the assembly has cooled, the bearing inserts have their diamond bearing faces locked in co-planar relation by the extruded metal from the metal pads.

Abstract: A printer using a ribbon having an ink layer thermally transferable to a sheet of paper. The printer comprises a thermal print head having plural heat generating elements, and a carriage carrying the print head. The carriage is pivotable between its printing position at which the print head is in contact with the paper, and its release position at which the print head is spaced from the paper. The printer further comprises a ribbon cassette removably mounted on the carriage and accommodating a supply and a take-up spool. The ribbon from the supply spool is fed in contact with the sheet of paper relative to the ribbon cassette while the carriage is moved relative to the sheet of paper. The printer includes a stationary rack extending along the printing line, and a pinion rotatably supported on the carriage. The pinion which is connected to the take-up spool is engageable with the rack while the carriage is in the printing position.

Abstract: A dot matrix printer has a programmable interval counter which produces motion control pulses for stepping the stepper motor of a print head carriage and/or of a paper advance system. The same motion control pulse which is used to control the carriage step motor is also input to a microprocessor, in an open loop fashion, to request further print head data for driving the wire array(s) of the dot matrix print head. A programmed time delay may be introduced between the programmable interval counter and the carriage step motor to compensate for wire flight time of the print head wires in a manner which is substantially independent of carriage velocity. A variable delay may also be introduced between the programmable interval counter and the microprocessor to compensate for carriage motor shaft lag/lead.

Abstract: A character generator for generating characters which are transferred to a recording medium by a dot-matrix print head. In the character generator there is stored for each character the information required for the activation of the printing needles of the print head. The information comprises two parts, one of which contains a length description, i.a. indicating the total length of the character, and an address to the memory area in which the second part of the information is stored, the said second part constituting the graphic representation of the character. The first part of the information for all characters comprises four bytes while the second part of the information occupies a memory area adapted to the length of the character.

Abstract: A solenoid-type print wire actuator includes a unitary one-piece bobbin formed of a magnetically permeable material and having two axially spaced-apart annular grooves in the outer surface thereof. An electromagnetic coil is wound on the bobbin. A dumbbell-shaped armature is disposed coaxially within the bobbin and is connected to the print wire for axial movement thereof, the armature having two cylindrical piston portions respectively disposed adjacent to the bobbin grooves. The ends of the bobbin are respectively supported in bores in the leg portions of a U-shaped member, the leg portions being interconnected by another piece to form a frame of magnetically permeable material to define a flux path.

Abstract: Apparatus for guiding an ink ribbon for a printer, with top edges standing perpendicularly to and inclined forward toward the printing plane, over which the ink ribbon laid on flange plates which act as slides when fed further and threads in itself. At the same time means for the quick fixing of the print head are provided on the apparatus serving for the guiding of the ink ribbon.

Abstract: A detachable carriage assembly for a printer having a frame for supporting a cylindrical platen and a drive motor for moving said carriage assembly and comprising first and second parallel supports mounted in spaced apart relationship on the frame of the printer parallel to the platen, a pulley support assembly movably mounted on one of the supports and connected to the drive motor for movement parallel to the one support, a bearing assembly slidably mounted on the other of the supports and a carriage assembly detachably mounted to the pulley support assembly and the bearing assembly for moving parallel to the platen as the pulley support assembly moves.

Abstract: A keyboard has a space bar centrally mounted on a plunger and supported at its ends by a torsion rod. The torsion rod has crank arms at its ends which are connected to the space bar and serve to distribute the actuating force on the space bar so that the plunger will move smoothly up and down and not bind. An attachment element in the nature of a yoke is provided for connecting the crank arms of the torsion rod to the space bar. A spring connected to the space bar flexibly engages the crank arm. The attachment element accommodates the natural, arcuate motion of the crank arm while simultaneously maintaining engagement with the crank arm to secure the space bar to the torsion rod and prevent the space bar from rattling or vibrating.

Abstract: The crayon holder includes a hollow body telescoped with respect to a collet member having jaws at one end. The collet member at a location remote from the jaws is threaded to a cylindrical portion of the body. A sleeve is telescoped over each of said body and collet member. Cooperating structure is provided on the body and sleeve to facilitate rotation of the sleeve without moving the sleeve in a longitudinal direction. The sleeve has a tapered portion for camming said jaws inwardly. A key on the sleeve cooperates with a groove on said collet member for rotating the collet member and moving it longitudinally relative to the sleeve as the sleeve is rotated about its longitudinal axis.

Abstract: A writing wick for felt markers and pens is formed by an elongate bundle of individual monofilament thermoplastic strands. Longitudinal channels are defined between the strands. The strands are selectively merged parallel to the direction of the longitudinal axis of the bundle sealing and isolating the longitudinal channels from each other and outwardly enclosing the channels. The longitudinal channels defined by selectively merged strands are operatively interconnected by radial capillary ring grooves (14) or by axially extending capillary incisions 15 penetrating from the outside of the bundle inwardly in the vicinity of the writing tip of the wick. Several longitudinal channel and interconnecting capillary ring grooves (14) or capillary incisions (15) may be used.

Abstract: In an assembly including components clamped together and in which one or both of the components is subject to a relatively high and variable tensile stress, fretting due to vibration at abutting surfaces of the components can start cracks in the surfaces which is then accentuated in the stressed surface.FIG. 1 of the specification shows a fan turbine rotor disc 4 clamped on a shaft 2 by nut 12 and interposed between confronting surfaces 14 and 16 on the disc and an adjacent bearing is a stress-reducing collar 6 which is slotted at 18 to define struts 20 extending between the surfaces. The struts 20 transmit the clamping load while allowing torsional flexibility to reduce the shear stress and hence fretting between contacting surfaces.In an alternative embodiment the surfaces themselves may be slotted which gives the added advantage that the tensile stress in the surfaces can be reduced or eliminated.

Abstract: An assembly for anchoring an element to a concrete slab (10) through means of a bore (22) extending through the slab and a bolt (26) removably received within the bore (22). The bolt (26) has a laterally extending foot (28) engageable with one side of the slab (10). A tapered spike (30) having a length greater than the thickness of the slab (10) is extended through the bore (22) to force the foot (28) into underlying engagement with the slab (10) and maintain the bolt (26) in such engagement and secure the bolt (26) against rotation.

Abstract: The present invention entails an adjustable boat cradle for supporting a boat. There is disclosed a rectangular base frame structure with a plurality of adjustable vertical support assemblies strategically located and connected to the base frame structure. Typically said vertical support assemblies extend generally upwardly from at least the corner areas of the base frame structure and includes an upper cradle pad that actually engages a side portion of the boat's hull while the keel of the boat is directly supported by an underlying support. To accommodate hulls of various sizes and shapes, the effective length and angle of orientation of the vertical support assemblies can be conveniently adjusted. In addition, the cradle pads are universally mounted about the vertical support assemblies such that they will rest adjacent the hull irrespective of the orientation of the support structure comprising the respective vertical support assemblies.

Abstract: An assembly for damping sea waves that constitutes a floating breakwater for protecting a sea wall. A plurality of vertical pilings extend into the sea bed and are spaced apart from each other and extend parallel to the sea wall. Automobile tires are positioned about the pilings and are supported by a platform made of struts on opposite sides of the pilings that extend parallel to the sea wall, with transverse stringers maintaining the struts in parallel and spaced relationship and also free to move vertically with respect to the pilings. The combined buoyancy of the tires and platform is such that the top surfaces of the tires are positioned substantially at the surface of the sea. A support beam structure is attached to the pilings generally along the tops thereof and interconnects the pilings, together with rigid tieback members that connect the pilings to the sea wall, all to aid in maintaining the pilings in vertical and spaced-apart relationship.

Abstract: The invention relates to an icebreaker system for marine platforms wherein the system includes two rings of obstacles: a lower ring and an upper ring fixed around pillars of the platform to be protected. The lower ring has obstacles showing a portion sloping upwardly and rearwardly. The upper ring has obstacles staggered with those of the lower ring and showing a portion sloping downwardly and rearwardly. A ring of obstacles is mounted rotatably and/or movably in the vertical direction. The obstacles are of truncated pyramid shape and asymmetrically shaped in front elevation.

Abstract: A tidal station includes a plurality of turbine/generator sets removably insertable along the central axis of a caisson to provide a symmetrical installation. Fixedly disposed basin side and sea side diffusers include inlets alternately juxtaposed opposite ends of the turbine/generator sets as the sets are rotatably displaced 180 degrees between ebb and flood tides. Ballasting/deballasting structure contained in the caisson permits self-portability of the caisson to its site and subsequent positioning thereat.

Abstract: A method of disposal or temporary storage of fine particulate solid waste material or a mixture of such solid material with liquid including pumping the solid material entrained in liquid through a pipeline by means of a piston pump into a natural or artificial dump space above ground or below ground. To pump fine grained waste materials, for example dusty or paste-like and sludge-like waste materials, without incurring problems regarding the entrainment liquid and to prevent, in the case of underground storage, the production of a geologically insufficiently stable packing in a natural or artificial cavity, a high-consistency mixture containing less than 20% by weight of liquid, which is generally water, is pumped into the space by means of the piston pump.

Abstract: Method for placing two submerged elements in a relative determined position, particularly in view of their mutual connection, comprising a first step of controlling the relative displacement of said elements on the basis of the measurement of electric values so as to ensure the alignment of a central point of one end of one element with the longitudinal axis of the other and a second step of progressively bringing the two elements in contact with each other by their relative displacement controlled on the basis of the measurement of their relative distance and mutual inclination angle, by means of acoustic emitters-receivers.

Abstract: The invention relates to a method of constructing a free standing structure in a body of water, comprising the steps of attaching an impervious membrane to a floating formwork, filling the membrane with water thereby expanding it, partially filling the expanded membrane with non-hardenable particulate material which settles to form a body within the expanded membrane resting on the bed of the body of water, removing water from the particulate body so that the body of water exerting a confining pressure on the particulate body renders it coherent, and filling a remaining upper portion of the expanded membrane with a material which hardens.

Abstract: A tension-leg offshore platform comprises a positively buoyant, floating upper unit in which an operations platform is supported above an ocean surface by a plurality of spaced vertical columns defining buoyancy chambers. The lower ends of the columns are connected to the ocean floor by a corresponding plurality of tension-leg assemblies. Each tension-leg assembly is comprised of a plurality of positively buoyant tubular members having their lower ends connected securely against upward movement to the ocean floor. The tubular members are of substantially equal length less than the pertinent water depth by an amount adequate to cause their upper ends to be located below the area of significant surface wave action yet substantially above the ocean floor. A separate flexible tension member for each tubular member connects the lower ends of the columns to the upper ends of the corresponding tubular members.

Abstract: Apparatus for inplace refinishing of the annular seating surfaces in top ded ball valves which comprises a locating ring adapted to be mounted on the top surface of the valve housing. An alignment gage is provided for precisely positioning the locating ring. A cutting apparatus is mounted on the precisely positioned locating ring. The cutting apparatus includes a carriage plate for mounting on the locating ring, channel-forming means mounted on the carriage plate and a cutting tool having a housing adapted to side in the channels and having a cutting head oriented to cut the seating surface at the desired angle.

Abstract: A drill press and stand providing an improved apparatus for cutting holes in plate vitreous material. The drill press includes a drill motor, a drill tool attached to the drill motor for cutting through the work piece, and a motor support interconnecting to and supporting the drill motor on the stand. The stand includes a base which is attachable to the work surface by a large suction cup which is attached to the lower surface of the stand base. The stand also includes a collar integral to and generally perpendicular to the upper surface of the base into which a mating drill press standard, a part of the motor support may be inserted. The motor support also includes a positioning mechanism for longitudinally moving the drill motor along the standard and may include a biasing spring to counteract the weight of the motor, etc.

Abstract: The workpiece supporting bed of the present machine is provided with a ballast filled frame structure therebelow for forming a solid unitary support structure to dampen operational vibrations normally transmitted to the bed. A gantry extends above and across the workpiece supporting bed and includes a cast main beam formed of lightweight material to facilitate rapid movement, particularly rapid acceleration and deceleration during forward and rearward movement of the gantry. Integrally cast longitudinally and laterally extending ribs are provided on the main beam to provide additional stiffness and rigidity thereto. A single drive motor is provided to drive opposed sides of the gantry simultaneously and in accurate alignment with each other. A rearwardly extending housing is attached to the main frame and is filled with a lightweight plastic material for adding further rigidity and stiffness to the gantry, without substantially increasing the weight thereof.

Abstract: In a preferred embodiment, a metal nut compacted and welded within the thickness of a metal sheet, within a sheet-aperture of lesser diameter than a top of the nut, spaced-apart compacted edge portions of the nut's top having a larger diameter than the nut's top at other edge locations in the compacted state, and the sheet's malleable metal of bottom portions thereof adjacent the aperture being compacted against and welded to malleable metal of a circumscribing side wall of the nut.

Abstract: A control lever structure for a mechanical finger clamp having a grip and first and second members projecting therefrom in opposite directions from each other. The mechanical finger clamp comprises a mounting member, and a plurality of articulate fingers pivotally connected to the mounting member, each articulate finger having a base portion and a leading end portion pivotally connected to the base portion. Pivotal movements of the articulate fingers are caused by hydraulic cylinders. A plurality of switches are mounted on the grip and the first and second members for selectively operating the hydraulic cylinders via solenoid-operated control valves. The arrangement of the plurality of switches is such that the movements of operator's fingers for operating the switches are similar to the movements of the articulate fingers.

Abstract: A method and apparatus for loading nuclear fuel pellets in levels onto a horizontally and vertically indexing tray string-by-string. The apparatus includes a belt feeder assembling each string at a location on pivotal blades over the tray. Arrival is optically noted and a pusher delivers the string to a drop site, completely loading the string onto the blades for delivery to the indexing tray.

Abstract: The feeding of batch material to a melting furnace is disclosed. The batch materials are choke fed to keep the total batch crust plus molten glass depth constant. The batch level keeps the arc electrodes submerged and helps promote arc stability and melting efficiency.

Abstract: Sorted stacked matter in a plurality of stacking boxes arranged in an array in a vertical plane is transferred to a plurality of trays supported on a plurality of horizontal endless conveyor belts arranged one above another. These trays are transferred to a tray lowering unit including a plurality of elevators and are lowered by the unit to a position at the same level as the lowermost first horizontal endless conveyor belt. These trays are then transferred to a second horizontal endless conveyor belt. At the forward end of the second horizontal endless conveyor belt, the transported matter is transferred from each tray to a next process section. The empty tray that results is transported on a third horizontal endless conveyor belt to an empty tray raising unit which is disposed adjacent to the starting end of the first horizontal endless conveyor belts to be re-distributed thereto.

Abstract: A telescoping boom assembly having novel and inexpensive apparatus for extending and retracting the boom assembly and for extending and retracting an articulated pipeline mounted on the boom assembly. A total of three winches can be used to move a multiple section boom assembly between a retracted position and an extended position regardless of the number of movable boom sections, and the same three winches can independently move the articulated pipeline between a folded and an extended position.

Abstract: A method of operating a water-turbine or a pump water turbine in which, when the runner is idling for phase modification running or stand-by running, the main machine is tripped by means of a main machine tripping circuit when the flow rate of cooling water supplied to the seal portions of the runner is maintained below a predetermined limit for a predetermined period of time. The main machine tripping circuit is excited to become operative only after the pressure around the runner comes down to a level approximating the water pressure in the draft pipe.

Abstract: An annular friction seal device to be disposed around the impeller of a turbine or high pressure compressor is disclosed. The turbine or compressor is of the type comprising, from the periphery inward, a support-ring surrounding the impeller, a first air-permeable annular layer fastened to the support-ring, and a second annular layer joined to the first layer and coming into immediate proximity with the impeller blade ends, and being abaradable by these ends. To simplify production of the annular seal device, it is provided with two annular layers provided within a single superalloy seal ring with channels bored through the entire seal ring. The channels are open to air in one zone and are closed in at least the upstream end of the other zone.

Abstract: An improved horizontally mounted wind wheel is provided which comprises a framework mounted for rotation in a horizontal plane on a central upright drive shaft, a plurality of secondary shafts supported for rotation on said framework near the periphery thereof, a vane mounted near one end thereof to each secondary shaft, a plurality of vane stops on the framework positioned radially inwardly of the secondary shafts for limiting the rotation of the vanes, each of said secondary shafts being mounted for rotation about an axis which is tilted with respect to a vertical to said horizontal plane whereby each vane has a preferred predetermined rest position defined by the direction of tilting of each axis from a said vertical.

Abstract: A low level indicator and warning device is provided wherein a diaphragm is provided directly in a line for drawing liquid from one container to another. Liquid flowing in the line washes directly across the diaphragm so that it remains clean and thus operative even in the presence of materials which might form a crust on the diaphragm.

Abstract: The air flow rate of a fan driven by a motor controlled by an adjustable speed control equipment is automatically controlled by stopping the adjustable speed control equipment in response to a fault signal therefrom during operation with an inlet vane installed upstream of the fan in fully open state, simultaneously throttling the inlet vane at a preset speed to a degree of opening appropriate for the load by means of a control circuit, and, after a period for reduction of residual voltage of the motor, changing over to operation of the fan by a commercial power supply thereby to shift to control by the degree of opening of the inlet vane.

Abstract: A jet pump plug for a multi-nozzle jet pump is disclosed wherein the nozzles are accessible through a relatively small opening in the pump structure. The plug comprises a plurality of sections, each including a closure plate and a lever coupled thereto. Each plug section is constructed so as to allow that section to be separately introduced into the opening to the vicinity of the nozzles from a location which may be remote from the pump. The closure plates are manipulated through their attached levers from a remote location to the end of sealing the nozzles with them. The first plug section introduced through the opening includes means for alignment relative to the jet pump structure so as to orient its closure plate with respect to the nozzles. The remaining plug section is supported by the first plug section upon being introduced into the opening.