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Sethi Rajinder Singh, Brettle Jack, Watson Lauren Diana, Lowe Christopher Robin, Cullen David Charles: Biosensor device. Plessey Co, November 9, 1988: GB2204408-A (239 worldwide citation)

A biosensor device, comprises a pair of substantially parallel electrical conductors 12 laid on a surface 11 of electrical insulation material on a silicon substrate 1 and an immobilised reagent 13 containing an enzyme coated over the pair of conductors. Addition of an analyte to the reagent materia ...


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Goodfellow Robert Charles, Griffiths Richard John Mostyn, Hodson Peter David: Terminating dislocations in semiconductor epitaxial layers. Plessey Co, September 20, 1989: GB2215514-A (59 worldwide citation)

A semiconductor assembly comprising a substrate 11 and a lattice parameter mismatched epitaxial layer (5, 7) is arranged such that dislocations (3) which span the epitaxial layer, are terminated by dislocation termination regions (10) constructed in the epitaxial layer. A region of the semiconductor ...


3
Bennion Ian, Stewart William James: Optical detection of specific molecules. Plessey Co, October 16, 1985: GB2156970-A (57 worldwide citation)

An optical method for detecting the presence and/or behaviour of a first form of specific molecules in various substances comprises the steps of applying a sample 6 of the substance (e.g. blood) to a molecular adsorbed layer 4 formed on an appropriate boundary surface of light transmitting device 2. ...


4
Dakin Dr John Philip, Wade Christopher Anthony: An optical sensing system. Plessey Co, March 28, 1984: GB2126820-A (52 worldwide citation)

An optical sensing system comprises an optical fibre (4) arranged to be subjected along its length to fibre deforming forces during operation of the system and means (1) for producing coherent light signals for transmission along the optical fibre (4). The optical fibre (4) is provided along its len ...


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Jackson Derek Ronald: Portable radio/transmitter. Plessey Co, July 11, 1990: GB2226931-A (45 worldwide citation)

A portable radio transmitter and receiver construction which is arranged for being carried entirely on the head of a user, the radio 1 comprises an adjustable headband 2 which supports two earpieces, in which a first earpiece 3 includes a battery compartment, a power lead from said compartment exten ...


7
Heller Harry George, Oliver Stephen Nigel, Whittall John, Tomlinson Ian: Photochromic spiropyran compounds.. Plessey Co, November 19, 1987: EP0246114-A2 (44 worldwide citation)

A series of novel photochromic spiropyrans are disclosed in which a spiro-adamantane group is introduced into the 2-position of the benzopyran or naphthopyran ring. The spiropyran compounds of the invention exhibit heliochromic properties, i.e. they colour in sunlight and fade rapidly at ambient tem ...


8
Eddison Ian Gregory, Swift John Benedict: Integrated electrical transformer. Plessey Co, October 22, 1986: GB2173956-A (39 worldwide citation)

A planar transformer comprises an insulating or semiconductor substrate 1, such as gallium arsenide, in which the primary and secondary conductor turns of spiral configuration are formed at different levels within a dielectric layer 2,3 applied to the substrate. This configuration enables the primar ...


9
Dakin John Philip: Temperature measuring arrangement. Plessey Co, November 28, 1984: GB2140554-A (35 worldwide citation)

A temperature measuring arrangement comprises means 2 for generating and launching light pulses into one end (i.e. launch end) of an optical fibre 1 which serves as a temperature sensing element and optical directional coupling means 6 located at the launch end of the temperature sensing element for ...


10
Joy Andrew Keith, Leslie Thomas Coutts: Analogue-to-digital converters. Plessey Co, April 4, 1990: GB2223369-A (34 worldwide citation)

An analogue-to-digital converter comprises a plurality of comparators (not shown) coupled to a decoder, Fig 2A (Fig 2B). The decoder has a plurality of decoding stages connected together such that in operation each decoding stage transmits a Gray code output. The Gray code output is achieved by coup ...