Abstract: An apparatus to indicate unauthorized manipulation of at least one protected device enclosed in a housing is provided. The apparatus includes a structure attached to a first portion of the housing and a token switch attached to a second portion of the housing. The token switch is operably positioned with reference to the structure. The token switch includes a plunger, and a register programmed with a value. The register is communicatively coupled with a processor in a circuit. The circuit is communicatively coupled to drive the device. The structure, the token switch, and the circuit are internal to the housing when the housing is in a closed position. The plunger and the structure are positioned to generate a current when the housing is opened. The programmed value in the register is changed by the generated current and the processor takes an action responsive to the change in the programmed value.

Abstract: Flame produced vapors for combustion chemical vapor deposition are redirected from the direction of the flame by differential atmospheric pressure, such as positive pressure provided by a blower or negative pressure provided by a vacuum. This allows, for example, lower surface temperatures of substrates being coated with flame-produced vapors and coating of interior surfaces.

Abstract: A thermal spray method and apparatus for applying a coating on to a substrate is provided comprising the steps of: (1) providing powder particles to be deposited on to the substrate; (2) providing a plasma spray apparatus for depositing the powder particles; (3) providing structure for preheating the powder particles prior to the particles entering the plume; (4) preheating the powder particles prior to entraining the particles within the plasma; and (5) depositing the molten powder particles on to the substrate.

Abstract: A thermal spray apparatus for depositing a coating on to a substrate is provided which includes a plasma generator for selectively changing gas from a gaseous state to a plasma, and apparatus for filtering plasma. Powder particles entrained in the plasma change from a solid state to a molten state. The apparatus for filtering the plasma permits only a high intensity region of the plasma to pass through to the substrate.

Abstract: Ceramic fibers may be produced by the electrophoretic deposition of metal oxide upon a conductive fiber core, which core may be subsequently removed.

Abstract: An oxide dispersion strengthened metal coating is applied to a substrate by positioning a laser spray apparatus over the substrate such that a laser in the spray apparatus forms a hot zone at a distance above the substrate sufficient to prevent the substrate from melting. An oxide dispersion strengthened metal powder coating material is injected into the hot zone to heat the coating material such that it will be in a plastic state when it impinges against the substrate. The coating material is then caused to impinge against the substrate to form a uniform coating on the substrate. The microstructure of the coating on the substrate is substantially identical to the coating material's microstructure before it is injected into the hot zone.

Abstract: A method is taught for the preparation of ceramic fibers by electrophoretic deposition of metal oxide upon a conductive fiber core, which core may be subsequently removed.

Abstract: A method is taught for the preparation of ceramic fibers by electrophoretic deposition of metal oxide upon a conductive fiber core, which core may be subsequently removed.

Abstract: Ceramic coated fibers may be produced by the electrophoretic deposition of metal oxide coatings on a conductive fiber core.

Abstract: A method is taught for the preparation of metal oxide sols particularly suited for the electrophoretic deposition of metal oxide coatings upon a fiber core.

Abstract: A method is taught for the electrophoretic deposition of metal oxide coatings upon a conductive fiber core.

Abstract: A method of ceramic coating a substrate by thermodeposition from a sol made by hydrolyzing and peptizing organometallic compounds in water. The sol contains colloidal particles having a size between about 0.0005 micron and about 10 microns and the deposited coatings have good packing characteristics as well as smoothness. Composite coatings are also deposited which contain reinforcing materials such as SiC embedded in the coated matrix. These coatings afford the substrate onto which they are coated excellent wear, anti-corrosion and insulating characteristics.

Abstract: A novel method for preparing sols from metal oxide precursors by using inorganic salts as the peptizing agent is disclosed herein. Sol-gels prepared from the sols are also disclosed. Ceramic coatings, monoliths, bodies and are formed. These structures have a particle size of down to 0.0001 micron and are endowed with excellent packing characteristics as well as smoothness.