baber/WOPTO huggingface dataset:
Patent GB-1493660-A (GB)
Title: Optical waveguide power dividers
IPC: G02B6/28
Filed: 1975-12-16
Abstract: 1493660 Light guides STANDARD TELEPHONES & CABLES Ltd 16 Dec 1975 51427/75 Heading G2J A waveguide power divider (e.g. for extracting a small amount of power from a main highway, with minimum insertion loss, in a multi-access ring or tree distribution system of a communications system) comprises a tube of transparent dielectric material having a portion of reduced diameter collapsed on to the outer surface of the cladding of an optical fibre extending therethrough, the R.I. of the tube being greater than that of the cladding, In one embodiment, Fig. 2, the power extracted is converted immediately into an electric signal. The divider is made by mounting the fibre 10, 11  within the tube 12 by means of spiders and then rotating the assembly in a lathe while heating the central portion of the tube 12 until it softens and collapses on to the fibre 10, 11. The spiders are removed and an annular photo-detector 20 is fitted against one end of the tube 12. Finally, the two ends of the fibre are provided with connector termination. Light is launched into the fibre from the left and a small amount is coupled into tube 12 over the region in which it contacts the fibre. The assembly may be potted in a resin of R.I. lower than that of cladding 11. In another embodiment, Fig. 3, the extracted power is conveyed as an optical signal to a point remote from the divider. The divider is made by drawing down one end of a glass tube 30, whose bore is lined with a glass layer 31 of higher R.I., to form a solid fibre 32. A hole 35 is then made as shown and a double crank is put into the waveguide in this region so that a straight fibre 39 having a core 36 and cladding 37 can be introduced through the hole 35 centrally within the uncollapsed tube 30. The assembly is then rotated in a lathe while the portion 38 of the tube is heated until it softens and collapses on to the fibre. The assembly may be potted in a resin of R.I. lower than that of cladding 37 and tube 30.
Patent GB-1371866-A (GB)
Title: Counting device
IPC: G06M1/14
Filed: 1972-11-08
Abstract: 1371866 Mechanical switches TRI-TECH Inc 8 Nov 1972 [10 Nov 1971] 51568/72 Heading H1N [Also in Division G4] A four-decade thumbwheel switch is provided with electrical switching means for indicating the switch position, the switching means being connected to conductors which are all mounted on the same printed circuit board. The switch comprises four decade drums (26-29 in order of increasing significance). Each drum has sets of lugs 35 which engage switch elements 45 (four per drum) and by breaking contact between the element 45 and conductor 56 when a lug is present indicate the position of each drum in binary code. All the switch elements 45 are mounted on a single printed circuit board 50 and when a voltage, either steady or pulsed is applied to conductors 63 in a predetermined order, the switch position can be read from lines 61 either in parallel or in series by scanning. In alternative embodiments, depressions in the drum or holes in a conductive layer thereof may replace the lugs.
Patent GB-1209777-A (GB)
Title: Heatable sheet of glass and methods for the manufacture thereof
IPC: C03C27/12
Filed: 1967-11-14
Abstract: 1,209,777. Stencilling. COMPAGNIE DE SAINT-GOBAIN. 14 Nov., 1967 [14 Nov., 1966], No. 51819/67. Addition to 1,145,367. Heading B6C. [Also in Division H5] The heatable glass sheet of the parent Specification has its resistance bands 2 initially deposited by a screen-printing process. The stencil is produced in the printing fabric by coating the fabric with a light-sensitive copying solution, which is exposed to light through a diapositive corresponding to the printed pattern, hardened in the areas exposed and washed out in the unexposed areas. The printing fabric is held with its threads at an angle of between 14 and 76 degrees, preferably 45 degrees, to the bands when printed. Since the meshes are either completely closed or fully open, the bands formed from this fabric have regularly spaced projections along their sides forming a sawtooth outline, Fig. 2. Since electrodeposition favours such projections, the reinforcing conductive coating thereafter formed is uniform. The fabric is adhered to a printing frame 10 with the threads running diagonally thereof and is evenly tensioned by pumping up a rubber tube (12) fitted in a channel 11 around the frame.
Patent GB-1483912-A (GB)
Title: Lubricant compositions lubricating method and concentrates therefor
IPC: C10N40/00
Filed: 1974-12-02
Abstract: 1483912 Lubricants LUBRIZOL CORP 2 Dee 1974 [15 April 1974] 52039/74 Heading C5F An additive combination in a lubricating composition or in an additive concentrate comprises a specified dithiocarbamate and a specified rust inhibitor. The dithiocarbamate has the formula where R 1 , R 2 , R 3  and R 4  are independently hydrogen or alkyl, or (R 1 R 2 N) or (R 3 R 4 N) are independently heterocyclic groups of 5 or 6 members and the total number of carbon atoms in R 1 , R 2 , R 3  and R 4  is at least 8, and X is an alkylene or aralkylene radical of not more than 8 carbon atoms. The rust inhibitor is a substituted succinic acid in which the substituent is a saturated or substantially saturated hydrocarbon group or may contain inert polar substituents that do not substantially alter its hydrocarbon character, or is the anhydride of such an acid, or the product of esterification of the acid or its anhydride with 0À1 to 1 mole per mole of acid or anhydride of an alkylene oxide or alkylene glycol or polyalkylene glycol containing not more than 20 carbon atoms. The base oil to which the additives are added may be animal, vegetable, mineral or synthetic. Other additives may also be present. The composition is particularly suitable for lubricating steam turbines, but other uses are referred to.
Patent GB-1365712-A (GB)
Title: Pierce nuts
IPC: F16B37/06
Filed: 1971-11-09
Abstract: 1365712 Making pierce nuts; jointing by forging; punching and shearing K SHINJO 9 Nov 1971 [19 Dec 1970] 52077/71 Headings B3A B3H and B3W A method of producing pierce nuts comprises shaping a metal strip 10 by pressing opposite edges of a first surface 22 to form depressions 18 along the edges, pressing side surfaces of the strip to form grooves 21 along the deressions, punching holes 24 in the metal strip and cutting the strip into nut-blanks. Pressing face 11 1  of upper press tool 11 applies pressure to the top surface of the strip to cause bulging of the strip edges, too much flow being prevented by sides 11 2  of the press tool and thus shaping edges 17 and flanges 16. Side press tools 12 engage dedepressions 18 and depress them to provide shaped grooves 21 and also to produce shoulders 23. A punch 13 then forms holes 24 at equal intervals along the centre of body 15 after which blanks 25 are formed by cutting the strip between shearing blades 14 1 , 14 2 . The holes of individual blanks are then tapped to provide screw threads 26.
Patent GB-1020939-A (GB)
Title: Improvements in or relating to paper feed mechanisms in typewriters and like business machines
IPC: B41J13/036
Filed: 1964-12-23
Abstract: 1,020,939. Typewriters. SPERRY RAND CORPORATION. Dec. 23, 1964 [Jan. 2, 1964], No. 52217/64. Heading B6F. A paper feed mechanism for a typewriter or like business machine comprises a feed roller 51, Fig. 3, mounted rotatably in end supports 59 on a pivot shaft 63 and disposed parallel to platen 27 and having a length substantially the same as the platen the mechanism being further provided with at least one support roller 107, mounted intermediate the length of the feed roller 51 on pivoted support 101, to urge the feed roller against the platen. The supports 59 and 101 are provided with control arms 85, Fig. 4, and 113 coacting with cam flats 83, 115, respectively, formed on a control shaft 81, whereby partial rotation of the shaft results in disengagement of the feed roller 51 from the platen 27. The feed roller 51 and support roller 107 are urged into engagement with the platen by springs 75 and 109, respectively.
Patent GB-1067783-A (GB)
Title: 1,3,5-tris-(3,4-dihydro-2h-pyran-2-methyl)-hexahydro-symm-triazine
Inventor: GAZZARD EDWARD GEORGE
IPC: C07D309/20
Filed: 1964-11-24
Abstract: The novel compound 1,3,5-tris-(3,4-dihydro-2H - pyran - 2 - methyl) - hexahydro - s - triazine is made by heating a mixture of formaldehyde and 2 - aminomethyl - 3,4 - dihydro - 2H-pyran, preferably using triethylamine as catalyst, in MeOH solvent.
Patent GB-1165536-A (GB)
Title: Improvements in or relating to Electronic Information-Storage Circuits, with special Application to Automatic Waveform Recognition
Inventor: MACKAY DONALD MACCRIMMON
IPC: G10L25/00
Filed: 1965-12-11
Abstract: 1,165,536. Electric analog storage; recognizing character forms. NATIONAL RESEARCH DEVELOPMENT CORP. 10 March, 1967 [11 Dec., 1965], No. 52722/65. Headings G4G and G4R. A multistage electronic analog shift register wherein the shift of a magnitude signal from one stage to a succeeding stage is initiated by a transfer signal received from the succeeding stage, comprises plural identical stages of which the ultimate and penultimate are shown (Fig. 1). A sign reversing amplifier 1 having feedback over capacitance C 2  between output and input operates in virtual earth mode, and its output at 2 is reset to a standard level by a trigger pulse on line 4. After reset, the amplifier generates a trigger pulse on line 5 to reset penultimate amplifier 6, whose output 7 is coupled to the input of 1 over capacitor C 1  and diode pump circuit D 1 , D 2 . A chain of similar preceding amplifiers (not shown) is provided, and the amplifiers may comprise pentodes with screensuppressor coupling negatively triggered by screen or suppressor pulses, or positively triggered by control grid or anode pulses; derived from the output over a differentiating circuit and inversion if necessary. On reset of any amplifier to standard output voltage, the amplitude of the resultant voltage step indicates the rest potential of the output prior to reset, so that on reset of amplifier 6, capacitor C 1  charges over diode D 2  and capacitor C 2  of amplifier 1 is in normal condition, so that if C 1  = C 2  the drop in potential at 2 equals that at 7 on the previous reset, so that equivalent changes pass through the chain. When the magnitudes to be registered are proportional to the time intervals between successive pulses of a series, the first stage (not shown) has C 1 , D 1 , D 2  replaced by a resistance from the input to predetermined potential, so that the output varies linearly with time and the voltage step on reset is linearly related to the time interval. An exponential variation is obtainable by returning the resistance to the first stage output. In waveform recognition (Fig. 2) the stage outputs are supplied (V 1 , V 2  . . . V n ) to a network of resistances R 1 , R 2  R n ; R 1 <SP>1</SP>, R 2 <SP>1</SP> . . . R n <SP>1</SP> also receiving voltages RV 1 , RV 2 , RV n  of opposite sign from a potentiometer; the pair junctions being connected to a device 8 generating signal when all inputs fall with preset limits # 0, to indicate the present of a predetermined pattern in the signal sequence applied to the shift register. A matrix of circuit enable automatic discrimination of a corresponding plurality of patterns and the potentiometer producing RV 1 , RV 2 , RV n  is controllable by the average output of detector 8 to automatically search for recurrent patterns.
Patent GB-1423250-A (GB)
Title: Production of liquid crystal devices
IPC: G02F1/1333
Filed: 1973-11-14
Abstract: 1423250 Modulating light SIEMENS AG 14 Nov 1973 [16 Nov 1972] 52760/73 Heading H4F In a display device in which a (nematic) liquid crystal layer 10 is disposed between two plates 1, 2 provided with patterned electrodes 5, 6 on their internal surfaces, transparent electrically insulating films 8, 9 are applied over each electroded surface and subsequently have a plurality of close parallel grooves formed therein, whereby a uniform orientation of the nematic liquid crystal molecules parallel to the adjacent surface is promoted. It is said that forming the grooves in the uniform film surface gives more uniform orientation than is obtained if the grooved surface contains more than one material, i.e. plate and electrode material. Advantageously the films 8, 9 are softer than the plate and electrode materials. As particularly described, the plates are of glass, the electrodes of tin dioxide and the nematic material exhibits optical scattering when electrically energized. The films 8, 9 may be of magnesium fluoride which is subsequently grooved with diamond paste. Alternatively they may be of a thermoplastic material, electrically charged at its opposite surfaces, exposed to an interference fringe pattern formed by two coherent light sources and heated during or after exposure to develop the groove system. They may also be of photovarnish material which is exposed to interference fringes and subsequently developed. A further grooving method is by oblique particle bombardment, e.g. ion bombardment, or a spray of glass balls. In the preferred embodiment, groove width is 1 Á, and spacing is less than 10 Á.
Patent GB-1443342-A (GB)
Title: Checking correct correlation of two data strips
IPC: G03B31/04
Filed: 1973-11-14
Abstract: 1443342 Film drive control K VOCKENHUBER and R HAUSER 14 Nov 1973 [14 Nov 1972] 52765/73 Heading G2E [Also in Division G5] Passage of a film 8 through a projector is stopped by energization of an electromagnet 35 which tilts the claw 27 away from the film. Detection of a mark 13', Fig. 4, on the stationary film then lights an indicator lamp 49, or keeps the projector motor circuit (64) closed, Fig. 6 (not shown).
Patent GB-1187868-A (GB)
Title: Improvements in Digital Counters.
Inventor: DIEDERICH MARIE ALPHONSE PAUL
IPC: H03K23/00
Filed: 1967-11-21
Abstract: 1,187,868. Electric counters. DECCA Ltd. 14 Nov., 1968 [21 Nov., 1967], No. 52908/67. Heading G4A. A counter designed to count in Gray code has a number of stages 19, 20, 21 connected by And gates 23, 25, the input being from a moving scale member having alternate opaque and translucent portions sensed by photo-cells 16, 17 spaced one unit distance apart, the scale portions being twice this distance in length. If the position shown represents an even number, the cell 16 changes from "0" to "1" when the number changes to the odd number above it, but does not change when the number changes to the odd number below it. Cell 17 does not change in the first case, and does change in the second. The lowest significance stage 19 responds directly to the input from cell 16 which is shown as i in Fig. 3. The output from photo-cell 17 is differentiated at 22 and applied to And gates 23 and 24. The "1" output from stage 19 is applied to And gate 23 and the "0" output to gate 24. Stages 20, 21 &c. change state whenever a "1" input is received. State 20 can therefore change only when stage 19 is in the "1" state, and cell 17 changes from "1" to "0". If stage 19 is in the "0" state, gate 24 is enabled so that an output from differentiator 22 is transmitted to stage 21 instead of stage 20. If both stages 19 and 20 are in the "0" state, the change signal is passed on to the next stage again by gate 26. Specification 1,176,556 is referred to.
Patent GB-1493954-A (GB)
Title: Charge effects in doped silicon dioxide
IPC: H01L21/316
Filed: 1974-12-09
Abstract: 1493954 Semi-conductor devices WESTERN ELECTRIC CO Inc 9 Dec 1974 [10 Dec 1973] 53087/74 Heading H1K A silicon dioxide layer formed on a semiconductor body contains one or more of the metals tantalum, niobium and uranium in an at least partially oxidized state, the total number of the metal ions per sq. cm. ranging from 10<SP>13</SP> to 1À5 Î 10<SP>15</SP> and being distributed through a region at least 50 Š thick. The ions provide non-annealable fast surface states, getter sodium ions present in the layer, or provide a stable negative charge in the layer. As described, tantalum is introduced into the silicon dioxide layer forming the gate insulation of a silicon MOSFET by ion implantation into the layer itself or into the surface silicon which is oxidized to provide the layer, or is deposited on the oxide by beam evaporation or chemical vapour deposition, or shallowly implanted and diffused in by heat treatment, the preferred method depending on where in the layer the tantalum is required. To create surface states it should be adjacent the silicon surface, for permanent storage of negative charge as close to that surface as is consistent with the avoidance of tunnelling of charges to and from the surface, e.g. 100 Š from it, while for gettering alone it should be remote from the surface to avoid unwanted electrical effects. Thus to produce surface states ions are implanted into the silicon prior to oxidation which concentrates the tantalum at the silicon-oxide interface, and at the surface of the oxide which is then removed chemically or mechanically. Gettering and charge storage are effected by specified heat treatments in helium with an electrical field across the layer.
Patent GB-1123016-A (GB)
Title: Substituted pyridazones and the use thereof as herbicides
IPC: C07D237/16
Filed: 1965-12-15
Abstract: The invention comprises pyridazones of the formula <FORM:1123016/C2/1> wherein R1 represents a phenyl or cyclohexyl radical, optionally substituted by a methyl group or halogen atom, and R2 represents a methyl, ethyl or acetyl radical.  The compounds are made by reacting an alcoholate with a 1 - substituted - 4,5 - dibromopyridazone - (6) or by reacting an alkyl or acetyl halide with a 1 - substituted - 4 - hydroxy - 5 - bromopyridazone - (6). The compounds are used as herbicides (see Division A5).  Specified compounds are 1 - cyclohexyl - 4 - methoxy - , 1 - phenyl - 4 - methoxy -, 1 - phenyl - 4 - ethoxy -, 1 - phenyl - 4 - acetoxy -, and 1 - p - fluoro - phenyl - 4 - methoxy - 5 - bromopyridazones.ALSO:Compounds of the formula <FORM:1123016/A5-A6/1> wherein R1 represents a phenyl or cyclohexyl radical, optionally substituted by a methyl group or halogen atom, and R2 represents a methyl, ethyl or acetyl group, are used as herbicides, either alone or in admixture with a liquid or solid carrier.  The herbicidal compositions may also include wetting agents, emulsifiers, glue, alginates or resins and may be used in conjunction with other active substances such as fertilisers. Examples relate to the use of 1 - phenyl - 4 - methoxy - 5 - bromopyridazone - (6) in aqueous dispersion.  The herbicides may be applied to the plants or to the soil in which they grow.
Patent GB-1292954-A (GB)
Title: Improvements in the operation of furnaces to obtain delivery therefrom of molten metal
Inventor: GLOVER MICHAEL JAMES
IPC: B22D17/30
Filed: 1968-11-09
Abstract: 1292954 Discharging molten metal by gaseous pressure WILMOT-BREEDEN Ltd 16 Jan 1970 [9 Nov 1968] 53184/68 Heading F1R A pump for transferring molten metal from a pot 35 comprises a pump chamber 2 which depends into the molten metal and having a gravity-closing inlet valve 8. The chamber 2 is supported from a plate 5, which rests on a frame 23, and through which projects a dip-tube 27 which communicates with a heated outlet tube 28. The plate 5 has an air inlet 16 cyclically connected to a supply of compressed gas. A sub-assembly 25 comprising a block 26, tubes 27 and 28, is separately removable.
Patent GB-1378154-A (GB)
Title: Components for constructing building walls or partitions
IPC: E04B2/78
Filed: 1971-11-16
Abstract: 1378154 Panel clips; structural elements C R ALLEN 16 Nov 1971 [14 Jan 1971] 53188/71 Addition to 1375047 Headings E1K and E1W A partition wall panel 200 has a flat strip 204 secured to one face, the strip having means for retaining the base 214 of a plurality of clips 206 for resiliently engaging one of at least two grooves in a stud to thereby releasably secure the panel to the stud. The means on the strip 204 may comprise key-hole slots 210 or slats for receiving hooks on the clips. The stud may be of extruded aluminium with the grooves so arranged that the edges of adjacent panels are abutting. A double wall may be formed. The conduit 232 in the stud may receive wiring.
Patent GB-1462380-A (GB)
Title: Bending apparatus
IPC: B21D11/06
Filed: 1973-11-16
Abstract: 1462380 Bending tubes KESTEVEN COPPER CYLINDERS Ltd 18 Nov 1974 [16 Nov 1973] 53361/73 Heading B3E A tube bender comprises a first forming member of generally cylindrical shape having a helical channel on its periphery, a second forming member between a non-operative position and an operative position in which it defines with the channel an aperture of ovoid shape, and means to retain the tube in the channel, whereby relative rotation of the two members bends the tube to helical shape. In Fig. 1, a frame 11, 12, 13 supports a shaft 14 on which former 15 is rotatable by fitting 28, and movable axially. The former has a helical groove 16 of semicircular cross-section, and an arm 30 for initially retaining the tube on the former. Roller 21 is mounted on shaft 20 on a lever 19 pivoted to frame arm 18 about an axis parallel to and offset from shaft 20, and has a groove of parabolic cross-section. The mounting is such that when the roller is in the operative position, outward pressure on the roller urges lever 19 against stop 19a. As shown in Fig. 2, flanges 24 on the roller engage a helical groove 25 in the former to advance the latter as it is rotated.
Patent GB-1401509-A (GB)
Title: Insertion of stator lamination stacks in housings of electrical  machines
IPC: H02K1/18
Filed: 1972-11-17
Abstract: 1401509 Dynamo-electric machines LICENTIA PATENT-VERWALTUNGS GmbH 17 Nov 1972 [18 Nov 1971] 53364/72 Heading H2A A rotary electrical machine comprises a housing 3 in which a stator core 6 can be inserted as a whole from above at right angles to the machine axis, end plates of the core resting on supporting protrusions 1 formed in the housing and the core being secured to the housing by bolts 7 passing through oblong holes 4 in the housing, bearing brackets for the machine rotor being mounted in apertures in end walls 2 of the housing, these apertures having been machined simultaneously with the protrusions 1 to ensure correct centering of the stator and rotor. The core is axially positioned by distance pieces 5 bolted to the protrusions 1. Thus cores of different length may be inserted in housings of a particular length by employing appropriate distance pieces. The bolts 7 are accessible from outside the housing to facilitate assembly and disassembly of the machine.