Abstract: A wheelmotor direct-drives the bucketwheel for wet underwater service in dredging. This eliminates the combination of an intervening gear box and a watertight chamber to house the rotating shaft hydraulic motor of conventional dry underwater service practice. In a preferred embodiment, a compression seal is provided which is adapted to create a chamber within the seal thereby providing a first line of defense against the intrusion of water into the junction of the stationary shaft and the rotating case. By injecting underwater lubricating grease into this chamber, displacing all of the air therein, the sliding contact surfaces are lubricated and a second line of defense against the intrusion of water is provided.

Abstract: The stand up articulated ski described herein consists of a steerable first ski in front, a combination of steering shaft with handlebars attached to the first ski, a second ski following the first with tandem, spaced, front and rear toe cups on top, a brake attached to the tail of the second ski, pivot pin assembly joining the second ski to the steering shaft, and a coil spring on the steering shaft, interposed between the pivot pin assembly and the first ski. The pivot pin assembly consists of a case tube assembly coaxial with the steering shaft, a pair of spaced pivot pin plates, each supporting an upwardly directed pivot pin coaxial with the rotational axis integrally attached to the case tube and adapted to engage corresponding ones of a pair of pivot bearings integrally attached to a bearing fixture that is attached to the tip of the second ski.

Abstract: In a combination of a top bedsheet with a bottom bedsheet that is fitted to a mattress, the improvement consists of providing a row of at least 3 buttons uniformly spaced along the foot end, plus one additional button on each side spaced about 12 inches from the foot end. All buttons are aligned with the bottom-perimeter edge of the mattress and are sewn to the bottom bed sheet. The top bed sheet is provided with a row of buttonholes in the bottom hem, appropriately disposed to engage corresponding buttons of the bottom sheet. For waterbeds, where the bottom bedsheet customarily is provided with 4 triangular corner pockets to receive the 4 corners of the mattress, a row of buttons is sewn to that portion of the foot end hem which is confined between the two corner pockets. The buttons may be sewn through reinforcing strips and tabs.

Abstract: In an infant-safe comforter fitted to the foot end of a crib mattress, the grasping power of the two boxed corners of the comforter on the corners of the mattress is controllably reduced by limiting the extent of an elasticized central segment of the free edge between the two corner seams in the foot end of the comforter. The terminal points of this elasticized central portion are spaced 11/2 inches inboard from each of the corner seams. The nudging head of an infant crawling under the comforter to the foot end raises the free edge above the bottom perimeter bead of the mattress to admit access of air under the comforter and releases the grasp at the corners to prevent asphyxiation under a comforter of low air permeability.

Abstract: The electrostatic recovery of gold in the drywasher is improved by providing means to scavenge the waste heat from the internal combustion engine that powers the air blower. This preheats the intake air to the air blower, whereby the equilibrium temperature of the compressed air delivered to the partially fluidized bed of ore particles on the riffle table is raised about 50.degree. F. above ambient temperature. The layer of fabric underlying the bed of particles is maintained at bone dryness, the ore particles are dried, and the electrostatic forces operate under most favorable conditions at low relative humidity.

Abstract: The obdurate hard cake, loaded with gold particles, that forms on the bottom and four sloping walls of the reciprocating deep rectangular jig pan by the compaction and dewatering of the suspended solids is eliminated, and the recovery of gold is significantly improved by a combination of:1. a rectangular pressurized water manifold spaced slightly above the plane of the pan bottom and provided with at least one row of jet orifices directed at the bottom;2. four steeply sloped walls at a dihedral angle of about 65.degree. with the plane of the open top of the pan;3. a V-bottom with the valley aligned parallel to the flow of slurry;4. a broad skimmer blade on the spillway gate, oriented coplanar with the surface of the slurry and directed backwardly against the flow;5. a connecting rod in the drive train which is resiliently biased, in thrust and in pull directions, by adjustable spring means;6.

Abstract: An improved multiple jet eductor assembly is described consisting of two parts:(1) a manifold ring with a pressurized water inlet and a plurality, preferably four, of radially-spaced, forwardly- and convergingly-directed jet nozzles, and(2) a tube having a bell end, near the bell end at a fixed axial distance therefrom a number of peripheral bosses radially disposed, equal in number to the plurality of nozzles, each boss containing a forwardly- and convergingly- directed porthole adapted to snugly receive a corresponding one of the jet nozzles.The eductor is assembled by forced simple coaxial translational motion of part 1 over the bell end of part 2, the nozzles engaging and entering the portholes with transitory snake-like flexure to reach a "home position" whereat the nozzles revert to their original, free of stress or distortion, molded, straight configuration, utilizing the unique memory property of viscoelastic materials, and securing part 1 to part 2 proximally in the "home position".

Abstract: A canteen adapted for mounting astride the cross brace of the handlebars of a motorcycle characterized by a deep rounded groove traversing the total length of the bottom wall of the main body of the canteen, the groove being of sufficient depth and width to completely submerge the cross bar when mounted astride thereof; a bracket affixed to the cross brace having top, front and rear flat faces adapted to wedgingly engage corresponding flat faces of a 2-level cavity formed in the mid-section of the groove when the canteen is placed thereon; a strap threaded through loops in the bracket for securing the canteen about its mid-section; a threaded neck extending from the right wall of the canteen with cooperating screw cap closure secured thereover, the axis of the neck being upwardly tilted in the vertical plane about 10.degree. above the horizontal major longitudinal axis of the canteen, whereby the screw cap closure clears the cross brace to which the canteen is straddingly secured.

Abstract: A method and train is disclosed for the highway safe transportation of a front loader implement, i.e., a back hoe or a skip loader, with the rear pair of wheels of same cradled above road level between the front and rear axles of a dolly and with the front lip of the scoop of the implement engaging a rearwardly-directed lip hook provided at the fork of a Y-shaped towbar. The two arms of said towbar extend rearwardly under the scoop, each arm with a length of chain and a terminal hook threaded under and behind the scoop, over the lift arms and there secured, each chain to the other, by means of its terminal hook. The forward-directed base of the Y is provided at its terminus with a trailer coupler engaging the trailer hitch of a towing vehicle. The front pair of wheels of the implement are raised above road level by downwardly uncurling the scoop.

Abstract: Improvements are disclosed in the conventional process for the laminated packaging of etched circuitry consisting of:(1) A unitized form tool which is produced by photomasking a metal plate, with the same pattern master transparency that is used for producing the photoetched circuitry, followed by chemical milling of the exposed areas to a depth equal to the thickness of the circuitry,(2) the manufacturer's low pressure dwell cycle in the press for prepreg containing epoxy resin or polyimide resin is for either resin changed to 210.+-. 15 secs. at 10.+-. 1 psi and 340.degree. F.

Abstract: In a rotary tool adapted for grinding under a flowing liquid film, wherein the particles of abrasive are metal-bonded to a rigid supporting surface, the improvement consists of a network in the supporting surface of grooves having constant depth and constant width and traversing said supporting surface to provide a continuum of centrifugal drainage grooves in the radial direction thereby subdividing said supporting surface into working elements. The ratio of the total area (A.sub.E) of said working elements to the total area (A.sub.G) of said network of grooves: A.sub.E /A.sub.G is at least 1.5. The configuration of the network of grooves is selected such that the angle of intersection of any side of any channel with the radius at any point is an acute angle between 0.degree. and 75.degree..