Abstract: The output of a fixed frequency local oscillator is multiplied in frequency by a frequency multiplier and used in the mixer of the first down-conversion stage of a heterodyne receiver. Receiver channel selection and tuning takes place at IF by means of a PLL, the phase detector for the receiver PLL being used also as the phase detected for the transmitter tracking loop PLL. The multiplied local oscillator output is also used in the mixer of the transmitter tracking loop.

Abstract: A method of performing roof construction work on a roof with inclined rafters using a work platform which includes a structural frame (10), an upper work surface (15) having multiple removable sections (16) mounted by the frame on which a worker can move about on the platform. A safety barrier (20) extends around the periphery of the upper work surface. Mounting feet (30) secured to the frame are located at predetermined positions enabling the feet to rest on the rafters and releasable fastening means (31, 41) are associated with the feet to secure the platform in position for work on the roof structure. The mounting feet (30) include abutment feet (40) which rest on the rafters of the roof structure and which are clamped to the rafters. At least one mounting foot (30) comprises a fixable mounting foot (31) which can be releasably fastened to the roof structure to prevent lifting movement, longitudinal sliding movement, and lateral displacement of the work platform relative to the associated rafter.

Abstract: Methods and apparatus for scrolling database records, particularly in a client-server computing system, are disclosed. A database (104) holds records, accessible by a server (102), that each include a unique identifier. A client (100) requests the server (102) to retrieve a set of database records. Records are retrieved from the database (104) and stored on the server (102) The server determines an upper context token and a lower context token corresponding to the end records for a subset of those records. The upper and lower context tokens include a reference to the respective unique identifier. The first subset records is passed to the client for display. The client then makes a scrolling request by a previous or next subset of data, and passes the relevant upper or lower context token to the server.

Abstract: Methods and apparatus at servicing-linked applications in a client-server environment are disclosed. A client 20 is in communication with a server 30, and both are running a main application (in one form a goods and services ordering application). An associated application (for example, On-Line Help) is supported by a second server 30′. When OLH is invoiced on the client 20, a unique identifier is passed to the main application server 30, which locates a corresponding URL string and passes the string to a browser 130 on the client 20. The browser 130 passes the URL to the OHL server 30′ where the respective OLH document is retrieved from a datastore 40, and returned to the client 20 for display on the screen 100.

Abstract: A tunable voltage controlled bandpass filter for a direct conversion receiver. A phase locked loop uses the phase change imparted by the bandpass filter to local oscillator breakthrough from the mixer for a measure of frequency difference between input RF and local oscillator output. An error voltage derived from the measured phase change is applied as a tuning control to the bandpass filter. A sample and hold arrangement allows disconnection of the tuning circuit for power saving. The filter is suitable for implementation as an integral part of an ASIC receiver.

Abstract: A calibrator for stabilization of a passband active filter firstly sets a low level of filter supply current to assure filter stability while the filter is tuned to the required passband. The supply current is then gradually increased until the filter becomes unstable. The supply current level is held constant when filter instability is detected and the current is then reduced by a pre-determined amount to maintain stability of the filter. Re-tuning of the filter may then proceed without risk of instability. May be used as part of a phase locked loop for operating channel selection in a radio.

Abstract: An antenna for a mobile telephone for applying to an ordinary gain antenna for GSM and a high gain antenna for ICO. The antenna comprises a strip of flexible insulating material having provided thereon a plurality of lines of conductive material, the strip is formed into a roll with one end at the outside of the roll and the other end inside the roll, the other end is drawable from the roll to extend the strip into an elongated conical shape.

Abstract: A process for the preparation of a compound of formula (I):HetSCH.sub.2 CH.sub.2 CH.dbd.CF.sub.2 (I)wherein Het is an optionally substituted 5- or 6-membered heterocyclic ring, which comprises reacting a compound of formula (II):HetSH (II)with a compound of formula (III):CF.sub.2 .dbd.CHCH.sub.2 CH.sub.2 L (III)wherein L is chlorine or bromine or a group --OSO2R.sup.a wherein R.sup.a is a C1-4 alkyl group or a phenyl group optionally substituted by a C1-4 alkyl group.

Abstract: The invention relates to benzoic acid derivatives being leukotriene antagonists. The compounds therefore are suitable as active ingredients in medicaments particularly in medicaments for the treatment of respiratory diseases.

Abstract: A process for the preparation of a compound of formula (I):HetSCH.sub.2 CH.sub.2 CH.dbd.CF.sub.2 (I)wherein Het is an optionally substituted 5- or 6-membered heterocyclic ring, which comprises reacting a compound of formula (II):HetSH (II)with a compound of formula (III):CF.sub.2 .dbd.CHCH.sub.2 CH.sub.2 L (III)wherein L is chlorine or bromine or a group --OSO2R.sup.a wherein R.sup.a is a C1-4 alkyl group or a phenyl group optionally substituted by a C1-4 alkyl group.

Abstract: Method and apparatus for capturing and saving recently dialed telephone numbers and for redialing automatically a telephone number from among the most recently dialed telephone numbers. Embodiments of the present invention: (a) capture an outgoing telephone number when it is dialed by a caller; (b) enter the telephone number into a database comprised of the last N telephone numbers that were dialed, where N is a predetermined number of telephone numbers, while eliminating duplicative entries for a particular telephone number; (c) display the telephone numbers in the directory in response to caller input; and (d) cause a telephone number in the directory to be redialed in response to caller input.