Johnson Matthey & Co., Limited

Johnson Matthey Public Limited Company

Alan E Heywood

Gordon L Selman

Robert Michael Hutchings

David J Stephenson

David C Bishop

Composite materials comprising, inter alia, a dispersion strengthened platinum-palladium-dispersion strengthened platinum sandwich have comparable properties of strength, ductility and electrical conductivity to the rhodium-platinum alloys used for fibre-glass bushings in the glass industry.

Composite material

This invention relates to catalyst units embodying or consisting of catalytic material in wire or strip (herein referred to simply as 'wire') form and especially to such units for catalytic oxidation of gases. The catalyst unit of the invention is particularly suitable for use in the manufacture of hydrocyanic acid comprises a pack of woven metallic gauzes wherein at least some of the gauzes disposed at or towards the front of the pack are made from wire (as herein defined) having a cross-sectional area greater than at least some of the gauzes disposed at or towards the rear of the pack.

Catalyst units for producing hydrocyanic acid

This invention relates to a laminated article, particularly to such an article comprising a gauze pack containing two or more gauzes such as are typically used as catalyst catchment or getter means in nitric acid production plants. Specifically, this invention provides a gauze pack segment suitable for locating in planar contiguous relationship with one or more further gauze pack segments to provide a gauze pack having a predetermined, for example, a regular geometric shape comprises a plurality of superposed gauze segments having at least when assembled substantially identical shape and area and held in fixed relationship one with another.

Foldable metallic gauze pack and segment

This specification describes an igniter, particularly for gas turbine engines, and comprising two or more electrodes separated by a body of insulating or semi-conducting material and having exposed working surfaces between which sparks may pass, at least part of the working surface or surfaces of at least one of the electrodes comprising a host material in which Co or Ni predominates alloyed or compounded with one or more additional metals selected from the group consisting of Ru, Rh, Pd, Ir, Pt, Ag and Au. Preferably, the additional metal is platinum which is present in an amount of 1 to 20 wt.% of the total metal content.

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St. Albans, United Kingdom

Alan E Heywood