U.S. Philips Corporation

Johannes T Klomp

Johannes T Van Roosmalen

Johannes M Van Esdonk

Joris J Oomen

Jacob Koorneef

Marcel Brouha

Peter Jozef Vrugt

Johan F Caers

Robert H Fastenau

Adrianus J Van De Ven

Gertraud Agnes Meden-Piesslinger

Michael D Martin

Matthijs J Baan Hofman

Inert non-magnetic metals are adhesively bonded to surfaces of metal oxides, for example ferrites, by means of a water vapor-hydrogen atmosphere. Reduction of the metal oxide only takes place at the interface of the inert metal and the metal oxide, after which the metal formed is partly dissolved in the inert metal.

Method of bonding a metal oxide to a metal

A method of manufacturing a color display tube having a magnetic quadrupole post-focusing mask, in which the mask is magnetized by magnetic field shaping means of soft iron, or the magnetic equivalent, having raised portions, for example strips placed against opposite sides of the mask sheet and subjected to an external strong magnetic field by an electromagnet to induce magnetic poles through the thickness of the mask sheet. The geometric arrangement of the raised portions of the field shaping means is such that cyclically a north pole, a south pole, a north pole and a south pole are induced into the sheet material surrounding each aperture. Using this technique, the entire area of a mask sheet can be magnetized in one operation. Also masks for small tubes and high definition tubes can be made.

Method of manufacturing a color display tube having a magnetic

For thermocompression sealing at least one of the materials to be joined is provided with an oxide skin before or during the sealing operation. The oxide skin can be formed, for example by firing in air. It has been found that the method is particularly advantageous for seals between a CrNi-alloy and, for example a second element which consists of aluminium, for example the seal between an Al entrance window and a CrNi-steel envelope of an X-ray intensifier tube. Notably by addition of an intermediate material, in particular aluminium, seals can thus be realized between many materials.

Vacuum-tight thermocompression seal involving the formation of an oxide

A cathode-ray tube of the post-focusing type comprising color selection means in the form of a ferromagnetic plate having a large number of apertures. The plate is magnetized so that a magnetic quadrupole lens is formed in each aperture. The ferromagnetic plate consists of an Fe-Co-Cr alloy having 25-27% by weight of Co and the remainder essentially Fe.

Cathode ray tube having an Fe-Co-Cr shadow mask and method of

Tools for the handling and shaping of glass, such as dies, moulds, shears. Sticking of the glass to the tool is prevented by the presence, at the tool surface, of a layer which has a low intrinsic strength with respect to the glass. This layer may be present as such or may be produced after oxidation. A number of possible materials are: boron carbide, Ni-Cr-B-alloys, tantalum boride.

Tools for the handling and shaping of glass

A composite body consisting of two or more formed parts of densely sintered aluminum oxide and a metal such as an envelope for a mercury vapor discharge lamp with a metal halide filling. The parts are connected together with material which comprises at least two of the oxides SiO.sub.2, Al.sub.2 O.sub.3 and B.sub.2 O.sub.3 and at least one of the trivalent oxides La.sub.2 O.sub.3 and Y.sub.2 O.sub.3. This material is applied at a relatively low temperature and is resistant to the gas filling up to approximately 1350.degree. C.

Growing community of inventors

Eindhoven, Netherlands

Johannes T Klomp