1
Sothcott Peter, Smith Sydney Francis: Exchange cabling. Standard Telephones Cables, January 19, 1983: GB2101828-A (11 worldwide citation)

In a complex electronic system, such as a telephone exchange, inter- rack cabling is a substantial part of the system's cost. To reduce this cabling, inter rack communication, at least in respect of information, uses beams of free space electro-magnetic radiation. In the present case infra-red beams ...


2
Russell Michael John, Bishop Michael Timothy John, O& 039, Connell John Richard, Smith Sydney Francis: Provision of analogue telephone exchange supplementary services. Northern Telecom, March 23, 1994: GB2270814-A (5 worldwide citation)

An automatic telecommunications system includes one or more analogue exchanges, such as a TXE 4 exchange with a switching network 1, and at least one digital exchange 3, such as a System X exchange, there being PCM transmission links therebetween. In order to provide supplementary services to analog ...


3
Smith Sydney Francis, Latin Robert Vincent: Telephone exchange. Int Standard Electric, November 5, 1982: FR2505123-A1

To provide additional services, e.g. data, information processing, an exchange 1 such as a telephone exchange is enhanced by the provision of one or more so-called by-pass circuits (5). Such a by-pass circuit (5), which may be a closed ring with separate transmission paths for two directions, interc ...


4
Smith Sydney Francis: Improvements relating to fault signalling in telephone systems. Siemens Brothers &, August 17, 1955: GB735138-A

735,138. Exchange systems. SIEMENS BROS. & CO., Ltd. March 5, 1954 [March 13, 1953], No. 7060/53. Class 40 (4). An unattended exchange is connected to an attended exchange over a plurality of junctions normally connected to provide a conversational path between the two exchanges, and on the occurren ...


5
Smith Sydney Francis: Improvements in and relating to co-ordinate switching systems. Ass Elect, March 20, 1963: GB921224-A

921,224. Electromagnetic relays. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Sept. 14, 1960 [Oct. 9, 1959], No. 34353/59. Class 38 (5). [Also in Group XXXIX] A relay has two windings L1 and L2, both of which require energizing before contacts 16, 17 are operated. The pivoted armature 5 of winding L1 contr ...


6
Smith Sydney Francis: Improvements relating to electromagnetic relays. Ass Elect, March 20, 1963: GB921225-A

921,225. Electromagnetic relays. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Sept. 14, 1960 [Oct. 9, 1959], No. 34354/59. Class 38 (5). In a relay having an E-shaped core and windings on the middle and on one outer limb of the core, the armature is carried on one or more moving contact springs and rockabl ...


7
Drake Bernard, Smith Sydney Francis: Improvements relating to telephone exchange systems. Ass Elect, June 6, 1963: GB928172-A

928,172. Automatic exchange systems. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Feb. 2, 1962 [March 10, 1961], No. 8853/61. Drawings to Specification. Class 40 (4). Contact-wetting and/or pad-switching potentials are applied to a switching connection in a transmission path at an exchange but are insuffic ...