A surface decking or mat-like sheet material is provided having a lower surface with generally flat portions adapted to lie on a floor, ground or other generally flat surface, and an upper surface having a plurality of parallel spaced unidirectional recessed passageways separated by upwardly extending portions having spaced parallel unidirectional sides which also form the sides of said passageways, said recessed passageways having bottom portions extending between said parallel sides, the exter...

An oil boom for sweeping and collecting oil from the surface of a body of water is constructed of a framework of structural members arranged in the form of a box beam, the framework supporting two parallel rows of floating barrier screen panels and being connected to end floats. Flow diverter vanes beneath the barier screen panels cause a surface transport current to flow between the two rows of the panels towards a surface skimmer located adjacent one end of the boom when the boom is towed in a...

A surface bolt which is latched against retraction when in a latching position and requires movement transverse to its length in order to unlatch the bolt for retraction.

The light source comprises an elongate arc lamp surrounded by a paraboloidal reflector which, in one embodiment, projects an annular beam of light onto an annular reflector, or mirror, which in turn projects the light onto a workpiece. Reflected light from the workpiece is projected backwardly through an opening in the center of the mirror and is projected in known manner onto a viewing screen. In a second embodiment the mirror comprises a transparent member having a reflective spot (e.g., silve...

A surface of an article adapted for relative motion with a fluid environment is finished by coating the surface with a fluid adhesive, covering the adhesive with a sheet of flexible film material under tension, and setting the adhesive while maintaining tension on the film material whereby the tensioned film material is bonded to the surface by the adhesive.

A surface sterilization method and blowtorch or burner for used in connection therewith. Jets of an ignited combustible mixture and a sterilizing fluid are projected toward a surface to be sterilized. The sterilizing fluid is heated by the flame of the burner and then contacts the surface to be sterilized in order to achieve sterilization. In a preferred form, saturated steam is used as the sterilizing fluid. The saturated steam becomes superheated as it expands when it leaves the burner and as ...

A method and apparatus for locating the center of a non-circular, such as a rectangular, face of a workpiece to permit the boring or drilling of an opening in the workpiece at the center of said face. The workpiece is adapted to be mounted in a rotatable chuck and locating blocks are firmly held, as by permanent magnets, against diametrically opposite surfaces of the workpiece adjacent said face. The locating blocks have planar reference surfaces which project beyond the said face of the workpie...

The growth of algae can be retarded or prevented by bringing the algae in contact with a surface which is coated with an organosilicon compound of the unit formula ##SPC1## The method is particularly useful for preventing the growth of algae in aquariums by passing the aquarium water through a porous filter, the filter elements of which are coated with the siloxane. Specifically by continuously passing water of a household aquarium through a polyester filter, the filter element of which has been...

A composition for providing a protective coating, comprised of a solution containing phosphate ions, chromate ions, ammonium ions, silicate ions and cations. The molar concentration of the phosphate ions, chromate ions, ammonium ions and cations is between 0.01 and 1 mole per 100 ml. of solvent, and the molar concentration of the silicate ions is from 0.01-33 percent of the molar concentration of the phosphate ions, chromate ions, ammonium ions and cations. The phosphate ions, chromate ions, amm...

A surface cooler for interposing in ram air or the like. Aerodynamic devices at the leading end of the cooler capture high energy air from the free air stream outwardly of the cooler mounting surface and divert the more stagnant air at the mounting surface away from the cooler inlet, the function being to reject heat to this captured air from a fluid used as a coolant in a location remote from the cooler. At the trailing end of the cooler other aerodynamic devices utilize the air flowing over th...