Abstract: A tillage tool appendage which includes a base plate or shank portion, adapted to be connected to the frame of the tillage tool, and a plow point bar-overcap welded to the base plate or shank portion. The plow point bar-overcap includes a leading edge lip which overhangs the base plate or shank portion so as to extend past the lower or bottom surface of the base plate or shank portion, and an overcap which lies atop the base plate or shank portion. Weld metal is deposited between the leading edge lip and the base plate or shank portion in a shielded location and is utilized for joining the plow point bar-overcap to the base plate or shank portion.

Abstract: A method for locating and catching fish in which a pH measuring device is lowered from the surface of a body of water constituting a fish habitat. During the lowering of the device, the depth at which the device is located is measured periodically, and the pH of the water at the several measured depths is determined. The several measured depths and the corresponding pH values are compared to determine the rate of change of pH per unit of depth. One or more discrete intervals of depth of the water over which the greatest rates of change of pH occur are identified. Upon completion of the lowering, the pH measuring device is removed from the water. A fish catching device is lowered in the water to a point located from about one to eight feet above a depth interval at which a marked increase in the rate of change of pH in the water has been identified as occurring.

Abstract: An electrical outlet box optionally having in combination therewith, a connector fitting for connecting a corrugated conduit to the box, the box having a back wall and at least one side wall of synthetic resin. A pressure removable plug is displaced out of the plane of the side wall so as to provide a precisely delineated zone of weakness surrounding the plug. When one preferred type of connector fitting is used in combination with the box, a wedge-shaped end portion of the fitting, having a relatively small surface area, is manually pressed against the pressure removable plug along a pressure zone immediately radially inwardly from the zone of weakness. This pops the plug out of the wall of the box, leaving a neat, smooth hole into which the connector fitting may be inserted by continued manual pressure applied thereto.

Abstract: Improved power cycles for improving the production of power and refrigeration and for conserving thermal energy, utilizing as a common basic characteristic, a hydride-dehydride-hydrogen power cycle in which hydrogen is reversibly combined with a hydride-forming material at a relatively low temperature and pressure, the hydrided material is then heated at constant volume to chemically compress the hydrogen, and finally the material is dehydrided by further heating the material to release hydrogen gas at relatively high pressure and temperature. The pressurized high temperature hydrogen gas as thus developed is used in various ways for producing power and refrigeration, including functioning as a low temperature heat sink for certain auxiliary or ancillary power cycles, prior to recycling the hydrogen gas for reuse in the described hydride-dehydride-hydrogen cycle.

Abstract: An electrode cap for use in encephalographic analysis which includes a flexible head cover having a plurality of spaced electrode anchor tabs disposed on the inner side thereof. Flexible electrode lead wires extend through the head cover and are attached to electrodes inside the cover. Each electrode is mounted in an independently positionable engaging tab which is adapted to be selectively positioned by finely adjustable contact engagement with one of the anchor tabs at a pre-selected locus. The head cover is preferably of multi-panel construction, including a crown flap which can be folded between opened and closed positions, thereby facilitating ready access to the interior of the head cover and ease of replacement or repair of one or more of the electrodes and the respective lead. An electrode board adapter is provided for connecting the electrodes to the E.E.G. amplifier and readout instrument.

Abstract: A puzzle which includes five interfitting pieces, four of which can be interfitted to collectively form a square and all five of which can be interfitted to collectively form a larger square.

Abstract: A tillage tool appendage which includes a base plate or shank portion, adapted to be connected to the frame of the tillage tool, and a plow point bar-overcap welded to the base plate or shank portion. The plow point bar-overcap includes a leading edge lip which overhangs the base plate or shank portion so as to extend past the lower or bottom surface of the base plate or shank portion, and an overcap which lies atop the base plate or shank portion. Weld metal is deposited between the leading edge lip and the base plate or shank portion in a shielded location and is utilized for joining the plow point bar-overcap to the base plate or shank portion.

Abstract: A rack for supporting and retaining garbage cans which includes a vertically extending supporting member, a pair of vertically spaced, horizontally extending arms each attached at a central portion of the respective arm to the supporting member, a pair of arcuate, generally semi-circularly curved, supporting elements each secured at a point on the periphery thereof to the lower of said two horizontally extending arms, and a pair of horizontally spaced handle retention tabs secured to the upper of said horizontally extending arms above the points of securement of the lower of the horizontally extending arms to the arcuate supporting elements.

Abstract: A security system for preventing theft of the liquid contents of storage tanks, such as those used for storing crude oil. The security system includes a first selectively locked access way, a second locked access way and a discharge valve security control subassembly accessible from outside the tank only by way of both access ways when both are unlocked. The discharge valve control subassembly is operatively associated with a housed, inaccessible discharge valve which can be opened only when the discharge valve security control subassembly is actuated. The discharge valve controls flow of the tank contents from inside to outside the tank through a discharge pipe.

Abstract: A system of flexible conduit and fittings useful particularly, though not exclusively, for conveying, supporting and connecting electrical service cables and wires. The system includes a corrugated, synthetic resin conduit which is flexible and mechanically strong, connector sleeves for clampingly engaging sections of the corrugated conduit in end-to-end relation, and hanger sleeves for clampingly engaging the conduit and suspending it from a wall or similar surface. A novel electrical outlet box is provided and includes internally toothed conduit-receiving inlet fittings for securely engaging an end of the conduits in inlets to the box.

Abstract: Isotopically enriched helium-4, that is, helium-4 which is low in helium-3, is useful as a nuclear reactor coolant. It is produced from liquefied natural gas source helium by distilling helium-3 therefrom. The coolant is preferably enriched in hydrogen up to about 6 percent by volume to thereby improve the heat transfer characteristics of the coolant, and to reduce the power requirements for circulation of the coolant.

Abstract: A tillage tool for forming an underground tunnel communicating with the surface by a narrow slot while effecting minimal surface tillage of the soil, the tool including a vertically extending shank plate having a lower edge joined to an elongated cylindrical mounting bar. A slotted forward cylindrical sleeve is demountably telescoped over the forward end of the mounting bar and receives the shank plate in a slot formed therein. The forward end of the cylindrical sleeve has a hardened wear plate secured thereto and positioned so that the wear plate lies in a plane extending at an acute angle to the longitudinal axis of the forward cylindrical sleeve. A rear cylindrical sleeve having a diameter equal to the forward cylindrical sleeve is demountably telescoped over the rear end of the mounting bar and has an end which abuts a rear end of the slotted forward cylindrical sleeve. A sharp edged slicer bar is detachably secured to the forward or leading edge of the shank plate.

Abstract: A vibrating earth ripping machine which includes a main frame and a vibrating frame which is pivotally connected to the main frame by a pair of movable thrust absorbing arms. The vibrating frame extends beyond the main frame rear end, and is secured to a transversely extending tool bar having a plurality of downwardly projecting ripper tines detachably secured thereto. A mass is rotatably mounted on the tool bar for eccentric mass distribution during rotation about a horizontal axis. A resilient vibration damping system is mounted between the main frame and vibrating frame to damp vibratory movement imparted to the vibrating frame by the rotating mass.

Abstract: A synthetic resin pipe which includes two identical complementary, extruded semi-cylinders joined by electromagnetic bonding along abutting longitudinal edges to form a smooth walled cylindrical pipe. In one embodiment of the invention, the smooth walled pipe forms an internal sleeve or liner within an external corrugated pipe having contiguous circumferential corrugations over its length, and having the troughs of the corrugations bonded to the outer surface of the internal sleeve.In the method for forming the pipe, two identical flat plastic sheets are extruded, then vacuumed formed into semi-cylinders each having radially outwardly projecting longitudinal flanges extending from opposite side edges thereof. A paste or dispersion containing ferro-magnetic particles is then applied to the flanges on the sides thereof adjacent the concavity of the respective semi-cylinder. The semi-cylinders are next arranged in registry to form a cylinder with the flanges abutting.

Abstract: A mattress cover for use on, and in combination with, a waterbed, including a rectangular fabric panel dimensioned to be longer and wider than the sleeping surface of the waterbed, and having a notch removed from at least two of the corners of the panel at one of the sides of the panel. Elastomeric retainer bands extend across each of these notches and each band has its opposite ends connected to parts of the panel on opposite sides of the respective notch. When the cover is used in combination with a waterbed of right parallelepiped configuration, the panel is superimposed on the upwardly facing sleeping surface of the waterbed, with the peripheral edge portion of the panel overhanging the sides, head and foot of the waterbed, and with the notches in the pad located at corresponding corners of the waterbed.

Abstract: A chain-powered pipe tong device for spinning up and torquing drill pipe and casing when making up or disconnecting a string of tubular elements in the drilling and casing of oil wells, the tong device including a chain sprocket drivingly connected through a clutch subassembly to a gear train which drives an open centered main gear. The main gear is rotatably supported in a gear housing having an open center aligned with the open center of the main gear. The main gear and gear housing each have aligned radially opening pipe receiving slots at one side thereof. Pipe engaging dog subassemblies are mounted in the gear housing for radial reciprocation relative to the main gear and the gear housing. Each dog subassembly includes a cam rod which has one edge bearing against a V-shaped cam surface defined by the main gear.

Abstract: A connector fitting by which corrugated conduit can be quickly connected to an electrical box. The fitting includes a pair of hingedly interconnected semi-cylindrical collars. Two spaced, box engaging projections are carried on, and extend axially from each of the semi-cylindrical collars, and the inner side of each semi-cylindrical collar is grooved to mate with and engage corrugations carried exteriorly on a corrugated conduit to be connected to an electrical box by the use of the fitting. Each of the box engaging projections includes a wedge shaped free end portion and a web portion by which the wedge shaped free end portion is connected to one of the respective collars. Each wedge-shaped end portion, its associated web portion and the collar to which the web portion is connected define an arcuate channel or relief for receiving and engaging the portion of the wall of an electrical box which surrounds an opening into which the connector fitting is snapped.

Abstract: An expanding gate valve having a pressure-secured seat. The valve includes a valve body having a cavity formed therein and an inlet and outlet formed in the body, both of which intersect the cavity. A counterbore is formed about the circumference of both the inlet and the outlet at their respective intersections with the cavity. An annular seat having a rear surface and a front seat surface is received within the inlet counterbore. An annular seal is formed on the front seat surface and a second annular seal is disposed between the rear surface and the valve body. The front annular seal has a sealing diameter greater than the rear annular seal and an annular recess is formed on the front seat surface on the radially inward side of the annular seal. A second annular seat having a planar front seat surface is received within the outlet counterbore.

Abstract: A system for passing long fan-folded documents and correspondingly lengthy copy paper through a reproducing apparatus, and including a frame attachable to the reproducing apparatus and adapted to support a roll of copy paper, and further including a feed tray detachably mounted on a reproducing apparatus and having a partition plate selectively positionable in the feed tray to facilitate containment in the tray of a fan-folded document to be reproduced. The feed tray includes a bottom plate having downwardly projecting ribs to detachably mount the tray on the reproducing machine, and upwardly projecting ribs spaced from a paper discharge slot at the front side of the tray, and acting as an indexing abutment for contacting and positioning the fan-folded document in the tray. The copy paper roll supporting frame has mounted thereon a cutting wire detent stud and a pivotable cocking lever. A spring biased cutting wire has one end connected to the supporting frame and its other connected to the cocking lever.