USA As Represented by Secretary of the Navy

Wayne C Tucker

Maria G Medeiros

Richard W Brown

Earl S Nickerson

Nicholas J Jones

James C Butts

Matthew T Roberts

Leonard E Burgmyer

Emily L Guzas

Russell R Bessette

William S Wilkinson

Raymond A St Amand

Francis C Spicola

Edward P Baker

Lucie Maranda

The magneto-optical Kerr effect (MOKE) is used to capture variations in magnetic permeability and magnetization to determine the presence of sensitization. MOKE-magnetometry-based systems and apparatus may be used to provide in-field magnetic measurements, and may be particularly useful in methods for assessing changes in composition, crystal structure, and grain size in magnetic materials.

Apparatus, systems, and methods for measurement using magneto-optical Kerr effect

An apparatus and method for determining the adhesive strength of a biofilm formed on an underwater optical surface and for determining the pressure, velocity and configuration of a water jet directed at the biofilm to wash away the biofilm and restore hydrophobicity to the optical surface, with a view to providing removal of such biofilms by underwater travel of a submarine without a need to surface for biofilm removal.

Apparatus and method for determining the adhesive strength of biofilms on underwater protective coatings

The present invention uses titanate compounds to replace chromates in metal primer paints used for corrosion protection on metal substrates.

Non-chromate primer for painting

Using a &#xbc; inch end mill a grid pattern of one inch squares or lands separated by concave troughs or grooves 0.025 inches deep is milled on to the surface of a one quarter inch thick magnesium plate. A conductive barrier such as a titanium foil is then laid over the magnesium plate, and is then pressed into the pattern with a one inch thick 80 durometer rubber sheet. Pressure of 250 pounds per square inch is then applied to the rubber to create indentations in the foil creating the same pattern as the one on the magnesium plate. The foil is then removed. An electrically conductive adhesive is then screen printed on the magnesium lands only, avoiding the grooves. The titanium foil is oriented to the pattern on the magnesium plate and mated to the magnesium plate by applying 200 pounds per square inch of pressure.

Fabrication of magnesium-titanium template for a magnesium hydrogen peroxide fuel cell

Non-chromate solutions for treating and/or etching metals, particularly, aluminum, aluminum alloys, steel and titanium, and method of applying same wherein the solutions include either a titanate or titanium dioxide as a 'drop-in replacement' for a chromium-containing compound in a metal surface etching solution that otherwise would contain chromium.

Chromate-free method for surface etching of stainless steel

Chromate-free method for surface etching of titanium

Chromate-free method for surface etching of aluminum and aluminum alloys

Non-chromate solutions for treating and/or etching metals, particularly, aluminum, aluminum alloys, steel and titanium, and method of applying same wherein the solutions include either a titanate or titanium dioxide as a &ldquo;drop-in replacement&rdquo; for a chromium-containing compound in a metal surface etching solution that otherwise would contain chromium.

Non-chromate metal surface etching solutions

A non-chromate conversion coating and method of applying same wherein the coating comprises a titanate, such as potassium titanate or sodium metatitanate, as a &ldquo;drop-in replacement&rdquo; for a chromate in an otherwise chromate-containing conversion coating.

Non-chromate conversion coatings

An isolated mechanical fastening system, which includes an exterior first section having a first transverse bore. The system also includes an exterior second section having a second transverse bore, wherein the second transverse bore is aligned with the first transverse bore. There is also an interior third section having a third transverse aperture. This third section is interposed between the first section and the second section and the third transverse bore is aligned with the first and second transverse bores. A fastener is positioned in the first, second and third transverse bore and is fixed to the first section. A polymeric material is positioned in the third section between the fastener and the peripheral wall of the third section.

Isolated mechanical fastening system

A platform for servicing of vertically positioned missiles in a ballistic ssile submarine. The platform includes a vertically inclined rail and a horizontal frame. In the frame there is a first element having a first and a second end superimposed over the inclined rail. This first element is movably mounted directly on the rail at the first end and movably mounted in vertically spaced relation above said inclined rail at said second end. At least one second element is spaced laterally from the first element to enclose a missile tube access opening. A vertical support means is also positioned in opposed relation to the inclined rail. The vertical support means is adjustable to the curved hull surface of the submarine to maintain the frame horizontal. The platform is constructed from a lightweight material such as aluminum, and it can be carried and assembled by two men for the efficient servicing of VLS equipped submarines and other similar vessels.

Two man loading platform for use on submarines

An apparatus for testing adhesive shear strength having a cylindrical adhve bond between test specimens which is subjected to pure shear. The test specimens are two cylindrical rods. One rod has a bore and counterbore reamed into one end along its longitudinal axis. The other rod has a diameter essentially equal to the diameter of the bore. The adhesive to be tested is placed within the bore and counterbore and the smaller diameter rod is inserted into and seated at the base of the bore. The adhesive fills the space between the smaller rod and the counterbore, creating a uniform, cylindrical layer of adhesive between the exterior surface of the smaller rod and the inner surface of the counterbore. When the adhesive cures, the assembly is subjected to a tensile load along its longitudinal axis, tending to pull the inserted rod from the bore and subjecting the cylindrical adhesive bond to a pure shear load.

Adhesive shear strength test apparatus

The present invention relates to an improved etchant for iron materials and method for etching iron materials. The etchant is an aqueous solution of ferrous chloride and phosphoric acid. The etchant preferably consisting of essentially of 20.6 gm FeCl.sub.2 .multidot.4H.sub.2 O, 88 ml H.sub.3 PO.sub.4 (concentrated 85%) and deionized water sufficient to make a 500 ml solution total. The method of etching includes the steps of preparing the surface of the iron material to be etched by degreasing and abrading the surface and etching the surface by immersing the iron material in the ferrous chloride and phosphoric acid solution. After the surface has been completely dried, an epoxy material may be bonded thereto. The method and etchant of the present invention provide an iron surface which bonds well with an epoxy, but does not destroy any existing epoxy bond in the material as would be present in a wound iron core material bonded with an epoxy cement.

Surface preparation for bonding iron

The present invention relates to a method for preparing a titanium or titum alloy surface and a primer for use in the method. The method broadly comprises the steps of grit blasting portions of the surface to which an adhesive will be applied and thereafter applying an acid wash primer to the surface portions. The acid wash primer preferably consists essentially of 70% by weight isopropyl alcohol, 5% by weight ethyl alcohol, 15% by weight n-butyl alcohol, 5% by weight zinc chromate and 5% by weight phosphoric acid.

Growing community of inventors

Exeter, RI, United States of America

Wayne C Tucker