Abstract: A damper for tunably damping acoustic waves in an ultrasonic waveguide is provided which may be used in a hostile environment such as a nuclear reactor. The area of the waveguide, which may be a selected size metal rod in which acoustic waves are to be damped, is wrapped, or surrounded, by a mass of stainless steel wool. The wool wrapped portion is then sandwiched between tuning plates, which may also be stainless steel, by means of clamping screws which may be adjusted to change the clamping force of the sandwiched assembly along the waveguide section. The plates are preformed along their length in a sinusoidally bent pattern with a period approximately equal to the acoustic wavelength which is to be damped. The bent pattern of the opposing plates are in phase along their length relative to their sinusoidal patterns so that as the clamping screws are tightened a bending stress is applied to the waveguide at 180.degree.

Abstract: An areal array of tubular electron sources is disclosed for producing multiple directed electron beams. Sources (10) are located in a parallel array between a conductive back plate (12) at a closed end of the tubes and a conductive face plate (14) having holes therein aligned with the second open end of each of the electrode tubes (10). An electrical current source (30) is connected between the back plate (12) and face plate (14) to resistively heat each of the sources (10) to a temperature high enough for thermionic electron emission. Electron beams (34) are produced from within each of the tubular electrodes (10). Extraction means which may include a magnetic field from a coil (29) and an extraction lens (18) tends to withdraw the electrons from within the sources (10) in an intense, collimated beam (34). Beams (34) are accelerated toward a target (28) through a beam deflection unit (22) having holes (24) associated with each of the electron beams (34 ).

Abstract: Bayer process caustic liquors are purified by treating the liquors with an organic solvent of relatively low boiling point, such as methanol, which causes the precipitation of inorganic carbonate and/or sulfate salt from the treated liquor. The treating solvent can be readily recovered for reuse.

Abstract: A three-way, wall-avoiding, recliner chair having an improved actuation system which minimizes the effort and attention required of the chair occupant to actuate the chair to reclining position from the normal generally upright position of the chair. The improved actuation system is achieved by a novel seat linkage mechanism mounting the seat and backrest to a fixed base such that when the occupant sits in the chair when the chair is in the normal generally upright position with the footrest closed, the seat linkage mechanism is urged by the occupant's weight to extend the footrest while moving the seat and backrest forwardly relative to the base into the TV position. However, a releasable lock mechanism is provided to restrain the seat linkage mechanism from moving to the TV position as aforementioned.

Abstract: A device for full depth hand routing characterized by a two piece base including a foot block and an attachment block, the attachment block being held to the foot block by a connector bolt and two adjusting screws to enable attaining parallel planes for a tool in the base of the block; a cantilevered holder extending from the attachment block; a tool on a shaft that is powered by a motor within a housing that has a substantially cylindrical barrel and a protruding threaded male part threaded engaging a threaded aperture on the cantilevered holder; an indicator scale around the base of the barrel and above the threads; and indicator carried by the attachment block and extending upwardly adjacent the depth scale such that accurate depth positions can be attained for routing to a desired depth. In a preferred embodiment, the cantilevered holder comprises a ring that allows 270.degree. visibility about the routing tool. Also in the preferred embodiment, the foot block has an upstanding flange at 90.degree.

Abstract: A portable boat hull scrubber for detachably mounting onto a boat and adapted to scrub the adhering debris from the underwater portion of the hull, said scrubber functioning with the boat stationary in the water.

Abstract: A recliner chair having a seat and backrest rigidly interconnected to move as a unit and being mounted on a stationary frame for movement into reclining positions by the chair occupant pulling-off the armrests which are included as part of the stationary frame. The footrest mechanism is actuated to extended position when the seat and backrest unit is moved into reclining position by means of the linkage mechanisms which mount the seat and backrest unit to the main frame; the latter being effected through a drive transmission linkage interconnecting the footrest mechanism with the mounting mechanism of the seat and backrest unit. The footrest mechanism provides dual footrest or leg supports which are positioned generally in vertical planes one behind the other at the front of the chair when in the retracted position.

Abstract: A three-way, wall-avoiding, reclining chair having an improved actuation system which minimizes the effort and attention required of the chair occupant to actuate the chair to reclining position from the normal generally upright position of the chair. The improved actuation system is achieved by a novel seat linkage mechanism mounting the seat and backrest to a fixed base such that when the occupant sits in the chair when the chair is in the normal generally upright position with the footrest closed, the seat linkage mechanism is urged by the occupant's weight to extend the footrest while moving the seat and backrest forwardly relative to the base into the TV position. However, a releasable lock mechanism is provided to restrain the seat linkage mechanism from moving to the TV position as aforementioned.

Abstract: A three-way, wall-avoiding, reclining chair having an improved actuation system which minimizes the effort and attention required of the chair occupant to actuate the chair to reclining position from the normal generally upright position of the chair. The improved actuation system is achieved by a novel seat linkage mechanism mounting the seat and backrest to a fixed base such that when the occupant sits in the chair when the chair is in the normal generally upright position with the footrest closed, the seat linkage mechanism is urged by the occupant's weight to extend the footrest while moving the seat and backrest forwardly relative to the base into the TV position. However, a releasable lock mechanism is provided to restrain the seat linkage mechanism from moving to the TV position as aforementiond.

Abstract: A three-way, handle-operated, wall-avoiding, recliner chair with dual footrests. From closed position, the chair is operated to TV position by means of a handle connected to the footrest mechanism. The handle is also connected to a rear seat mounting link to move the seat forwardly to the base during which time a restraining mechanism prevents the backrest from moving relative to the seat. Once in the TV position, the restraining mechanism is no longer effective, and the occupant may exert pressure on the backrest to recline the seat further relative to the base while also moving the backrest forwardly relative to the seat as well as the base to avoid striking any nearby wall. Novel linkage mechanisms are provided for carrying out the above, and a spring mechanism is provided to lock the footrest closed against inadvertent actuation such as when the chair is being relocated and is being pulled by its armrests.

Abstract: A thread protector for the external threads of pipes comprising a thread cap structure that is composed of plastic material and defines internal threads that are adapted to receive the externally threaded pin portion of a pipe. The outer extremity of the thread cap is formed to define a reduced diameter receptacle portion that receives a mating metal cap structure in such a manner that the thread cap and metal cap define a substantially contiguous annular outer surface. The metal cap is formed to define an annular body portion that defines a plurality of spaced apertures that are adapted to receive the plastic material of the thread cap to establish an interlocked relation between the plastic and metal cap structure. The metal cap defines a substantially planar circular end wall flange forming an opening through which an end wall portion of the plastic inner body protrudes.

Abstract: A universal joint includes a unitary face seal and retainer assembly which provides a face seal for retaining lubricant and excluding contamination. The assembly determines the limits of relative movement between the trunnion and bearing block during assembly, shipment and installation such that the seal members are not damaged during assembly and the face seal is not broken during shipment and installation.

Abstract: An areal array of tubular electron sources is disclosed for producing multiple directed electron beams. Sources (10) are located in a parallel array between a conductive back plate (12) at a closed end of the tubes and a conductive face plate (14) having holes therein aligned with the second open end of each of the electrode tubes (10). An electrical current source (30) is connected between the back plate (12) and face plate (14) to resistively heat each of the sources (10) to a temperature high enough for thermionic electron emission. Electron beams (34) are produced from within each of the tubular electrodes (10). Extraction means which may include a magnetic field from a coil (29) and an extraction lens (18) tends to withdraw the electrons from within the sources (10) in an intense, collimated beam (34). Beams (34) are accelerated toward a target (28) through a beam deflection unit (22) having holes (24) associated with each of the electron beams (34 ).

Abstract: An electric busbar installation comprises at least one busbar comprising a rigid bare elongate conductor housed within and rigidly secured to and spaced from a rigid tube, arranged with its axis substantially vertical by longitudinally spaced rigid insulators, the space between the busbar and the tube containing an electrically insulating fluid which is in direct contact with the bare conductor of the busbar, at least one duct which is in thermal association with the bare conductor throughout the length of the busbar and which forms part of a closed circulatory system for evaporable refrigerant; and interconnected in the circulatory system, condensing means for receiving evaporated refrigerant from, and for delivering liquid refrigerant to, the duct.

Abstract: A three-way, handle-operated, rocker-recliner chair includes a base, a rocker frame mounted on the base, a carrier link pivotally mounted on the rocker frame, a seat and armrest unit pivotally mounted on the carrier link through a linkage which includes a backrest link fixed to the backrest, a footrest linkage mounted to the seat and armrest unit and actuated by a manual control handle. When moving from upright to TV position where the footrest is extended, a sequencing linkage prevents relative movement between the seat and backrest and the carrier link during an initial phase of such movement but later permits the seat and backrest to be moved into various advanced reclining positions when the occupant exerts pressure on the backrest which fulcrums about the carrier link. Because of chair styling and leverage requirements, the seat has a seat link with an upwardly projecting V-shaped rear portion which is pivotally connected to the backrest link.

Abstract: Adjoining edges of sheets of pre-coated metal or other rigid material may be interlocked against movement transversely apart by forming the edge of a first sheet with a lock member constituted by a transversely offset reverse flange having at its extremity an outwardly directed first hook member and forming the adjoining edge of the second sheet with a transversely offset projecting flange whose extremity forms a second hook member directed inwardly. The sheets may be locked together by superposing the second hook member over the first hook member with the projecting flange behind the reverse flange and with orthogonal flanges spaced slightly apart and relatively rotating the sheets to a fully interlocked position defined by abutment between the orthogonal flanges. The above arrangement can advantageously be used in the vertical rear corner joints of a pre-coated steel cabinet where it is helpful to be able to assemble the cabinet from its major components without the need for pop-riveting or the like.

Abstract: Plural liquid containing bottles of differing sizes are simultaneously held in a cabinet in an inverted position so that the liquid flows by gravity from an orifice at the top of each bottle. A tension spring controls the vertical position of a first, fixed bearing surface for the top of each bottle relative to a second bearing surface for the bottom of the bottle to facilitate insertion of different sized bottles between the surfaces. A valve is selectively opened to enable liquid to be dispensed by gravity from the bottle through a dispensing tube extending through a stopper in the orifice. A vent tube attached to the stopper has an open end exposed to the atmosphere above a liquid-air interface in the bottle to assure the flow of liquid to the valve. The second surface carries the stopper and is on a plate that is detachable from the remainder of the holding structure and is horizontally slidable toward and away from a door through which bottles are inserted into the cabinet.