Abstract: In this improved ball-and-socket trailer hitch, the heavy coil spring, conventionally utilized to forwardly bias a latching collar, is eliminate; instead threaded means are provided to move the collar back and forth when it is rotated manually. Unlatching is much easier in the absence of strong spring bias on the collar, so the need for additional collar-actuating mechanism such as levers, handles and linkages, often required is conventional hitches, is eliminated. The collar may locked in a forward latched position by the inclusion of a pivoted, thumb-operated lock lever, which is spring loaded to automatically drop into the rear edge of the collar when the collar is moved into its latched position, and thus lock the collar in this latched position, constrained against rearward or rotational movement, to eliminate risk of trailer uncoupling due to unintended unlatching of the hitch. The lock lever may be adapted to accept a padlock to avoid trailer theft.

Abstract: There is provided a mixing and blending apparatus having an axial impeller mounted for rotation in a container. A removable stationary baffle is spaced radially outwardly of the impeller blade with at least a portion extending upwardly from the plane of rotation of the impeller. The baffle has at least two axially spaced aperture means located intermediate the inner and outer edges of the baffle at a location in the upwardly extended portion of the baffle means to permit a portion of the mixable material to which rotational motion has been imparted to flow through the baffle. The baffle is held in position in the container by means of a screw and wing nut.

Abstract: A lid is provided for an open top container. The lid is made from a frangible material such as plastic. A tearable tab is defined by a pair of score lines each of which is on two spaced sections of the lid. The sections are located at least partially in different planes of the lid. The spacing between the sections defines a wall portion including at least another plane of the lid. This spacing is free of score lines to form a gap in each of the pair of score lines. The spaced sections of each of the pair of score lines are otherwise in alignment.

Abstract: Unanchored fluid storage tanks rely primarily on the weight of fluid resting on an uplifted portion of the base plate to balance seismically induced overturning moments. Local uplift is therefore necessary to develop the resisting moment. This has often resulted in buckling and other damage. These problems are reduced or eliminated by inserting a ring filler under the tank wall, so that the base plate is partly preuplifted. The weight of fluid resting on the preuplifted portion of the base plate can contribute to the resisting moment without any additional uplift of the tank wall. It is shown by static analysis and by experiment that preuplift significantly improves the lateral load capacity of unanchored tanks.

Abstract: According to this invention, there has been provided an inline final filter unit for the filtration and administration of intravenous fluids or the like wherein a flexible, nonporous intravenous tubing member contains microporous hollow fibres arranged within the tubular member parallel to the longitudinal direction of such tubing. The fibres are closed at one end and open at the opposite end. A flow blocking material is arranged around the fibres for blocking fluid flow through the flexible tubular member, other than through the material of said hollow fibres. At least one gas permeable hydrophobic fibre is arranged to extend into the tubing member in proximity to the microporous hollow filter fibres. One end of the hydrophobic fibre(s) is in communication with the atmosphere.

Abstract: A mixer assembly including a container having a rotatable impeller therein and a motor base having a casing and a drive shaft in the casing adapted to be coupled to and drive the impeller in the container. The drive shaft in the casing extending through an opening in the casing and having a disk fixed to the shaft for rotation therewith. The disk being positioned above the opening in the casing and extending radially outwardly over the opening whereby liquid contacting the upper surface of the disk will be spun off as the disk rotates.

Abstract: A hermetically sealable enclosure for an electronic device. Layers of solder glass bond the lead frame to the enclosure base and to a metallic seal ring. The base and ring can be coated with thin layers of aluminum to promote bonding. The surfaces of the base and ring can be roughened to promote bonding.

Abstract: A method and apparatus for illuminating a surface to provide a desired light intensity. The light intensity at discrete points along the illuminated surface is measured through a light transparent material, and opaque materials are applied to the transparent material to block out some of the light and thereby produce a light filter such that the desired intensity at each of the discrete points along the surface is obtained. An oscilliscope, or alternatively, a computer display to indicate light intensity are used.

Abstract: An electrodeposition method and apparatus wherein improved efficiency in the operation of an electrodeposition cell is obtained by providing an electrolyte confining area around the cathode in the cell and inducing positive flow of the electrolyte into and out of the confined area to increase the volume of electrolyte per unit time coming into contact with the cathode when the cell is operating.

Abstract: A cleaning unit including a stay cleaning means such as a brush is mounted in the housing and is permitted to freely rotate around the axis of the stay. When the housing is moved up and down the length of the stay in a fixed angular position, the cleaning unit is free to rotate with the wind of the stay and thus the stay is cleaned.

Abstract: An electrodeposition method and apparatus wherein improved efficiency in the operation of an electrodeposition cell is obtained by providing an electrolyte confining area around the cathode in the cell and inducing positive flow of the electrolyte into and out of the confined area to increase the volume of electrolyte per unit time coming into contact with the cathode when the cell is operating.

Abstract: A vapor degreasing method and apparatus wherein a second cooling coil is used to prevent escape of solvent or solvent vapor from a degreaser. Gaseous refrigerant from the second coil can be released to the freeboard space above the solvent vapor zone to provide a barrier layer.