International Standard Electric Corporation

Itt Industries, Inc.

Standard Telephones & Cables Limited

Thomas M Jackson

Robert J Hodges

Rudolf A Heinecke

Sureshchandra Mishrilal Ojha

Jack R Peters

David J Moule

Alan D Brisbane

Peter Gordon Eldridge

Stephen L Amphlett

An optical fibre is provided with a moisture barrier layer by exposing a plastics coating on the fibre to a pulsed plasma in order to modify the surface, for instance by implantation of silicon and/or by the deposition on the plastics layer an inorganic layer such as a non-stoichiometric composition of silicon and carbon or silicon and nitrogen.

Optical fibre manufacture

A capsule for use as a temperature responsive element in a temperature sensitive electrical switch. The capsule is provided in a transistor mounting can configuration to facilitate printed circuit board mounting. The capsule contains a fluid and a concave disc. At a predetermined temperature, the disc snaps-over into a convex configuration. Movement of the disc is detected to provide an output signal which is temperature responsive.

Temperature sensitive capsules

A snap-action switch unit uses as its movable element a spring strip (23) mounted in a frame (20) such that the strip is bowed. A rod or the like (22) across the strip at its middle constrains the strip so that one half is bowed away from a flat surface (21) while the other half is adjacent to and roughly parallel with the flat surface.

Switch unit

A ferrule terminated optical fiber in which the fiber is held only approximately on the axis of the ferrule on the sides of which flat reference surfaces are subsequently machined. Machining is performed to a predetermined distance from the center of a fiber core, the position of which is revealed by launching light into the fiber from the other end. Providing the reference surfaces as a last manufacturing step avoids the problems of cumulative errors which arise from assembling parts having dimensional tolerances, together with the error resulting from distortion liable to occur during the setting of the adhesive holding a fiber in a ferrule.

Method of making optical fiber terminations

A method for making a black matrix type shadow mask color television tube. A shadow mask with standard size apertures is sprayed with a black brushing cellulose lacquer while at the same time drawing air, at high velocities, through the apertures to reduce the size of said apertures. A sufficient quantity of sprayed lacquer is utilized to obtain a 10% reduction in aperture size. The mask is then utilized to coat the tube's screen, i.e. its inside face, with a colloidal graphite paint to form the required adherent black matrix surface on said screen having a plurality of holes therein. The apertures of the shadow mask are then restored to their original size by rinsing the mask in acetone to remove the lacquer coating. The resultant original size apertures of the shadow mask are utilized to form the pattern of phosphor dots on the screen overlapping the holes in the black matrix.

Reducing aperture-size of shadow mask in painting black matrix CRT screen

This relates to an optically isolated switching device made by coupling the output of a light emitting diode into a thyristor. Sensitivity is determined by optical flux density rather than total flux. Improved sensitivity is obtained with a mesa construction of a diode mounted on and bonded to a thyristor at a window in its cathode via a glass preform having a high refractive index.

Growing community of inventors

Bishops Stortford, United Kingdom

Thomas M Jackson