baber/WOPTO huggingface dataset:
Patent GB-801959-A (GB)
Title: Differential servo control
IPC: G05D3/14
Filed: 1955-12-28
Abstract: 801,959. Selsyn machines. COLLINS RADIO CO. Dec. 28, 1955 [Jan. 14, 1955], No. 37142/55. Class 35. [Also in Group XXXVIII] The Specification describes a synchro and a resolver arrangement for producing a pair of voltages representing the positional error between two shafts and differing in phase by 90 degrees. In Fig..3 the rotor of a conventional synchro 20 is coupled to the load shaft 39 and the servo is connected through lines 23, 24, 25 to the stators of a corresponding pair of synchros 42, 43 at the controlling end. The rotors 54, 59 of these synchros are provided at one end and provide the two error voltages Ea, Eb. These rotors are both coupled to input shaft 28 and are angularly spaced by 90 electrical degrees. In Fig. 4, resolvers are used, the rotor of resolver 71 being coupled to the load and the rotor 76 being provided with two coils 79, 81 spaced at 90 electrical degrees. The junction of the two coils is earthed and the error voltages are derived across the two windings.
Patent GB-1151122-A (GB)
Title: Adjustable Type Construction.
IPC: B41F27/00
Filed: 1966-08-19
Abstract: 1,151,122. Selective printing. REYNOLDS PRINTASIGN CO. 19 Aug., 1966 [22 April, 1966], No. 37263/66. Heading B6F. Type assembly having an adjustable type head 24 comprises a support 12 provided with a flat, rectangular base 14 which carries releasably a clip 30 supporting a rigidly attached type face 26. Clip 30 is provided with depending spring fingers 32 having detents 34 which engage firmly the undersurface of base 14 to hold the typehead 24 in any one of adjusted positions with respect to sides 18, 20 of the base 24.
Patent GB-325051-A (GB)
Title: Improvements relating to spinning machinery for artificial silk
IPC: D01D7/02
Filed: 1928-12-17
Abstract: 325,051. Harben's (Viscose Silk Manufacturers), Ltd., and Goodwin, L. C. Dec. 17, 1928. Spinning-machines; spindle apparatus. - In machines for spinning artificial silk having spinning-boxes arranged in separate compartments communicating with a common exhaust duct, each compartment b is constructed so that, in conjunction with the top of the box a, it constitutes a fan casing with an exit e to the chambers f of the ventilating duct at about the level of the cover of the box and at one side of the compartment, so that the air entering by the opening c for the guide funnel impinges on the cover of the box which acts as an impeller, such action being assisted by filling in the corners of the compartments b with shaped blocks so that a substantially volute form is produced around the boxes.
Patent GB-635268-A (GB)
Title: Improvements in or relating to methods of wrapping blocks of butter, margarine, edible fat, and similar fatty substances, and wrapping material therefor
IPC: A23C15/18
Filed: 1946-12-19
Abstract: 635,268. Compound sheet materials. SORENSEN, C. Dec. 19, 1946, No. 37346. Convention date, June 13, 1944. [Class 140] A laminated material suitable for wrapping butter or margarine comprises two layers of aluminium foil of thickness between 0.006 mm. and 0.01 mm. and a central layer of paper of thickness between 0.03 mm. and 0.07 mm., the layers being secured together by glue or lacquer, and both outer surfaces of the laminate are coated with a lacquer, preferably a cellulose lacquer or one soluble in ethyl alcohol.
Patent GB-1349697-A (GB)
Title: Quartz oscillator more especially for a clock drive
IPC: H03K3/283
Filed: 1972-08-11
Abstract: 1349697 Transistor oscillator circuits DIEHL 11 Aug 1972 [17 Sept 1971] 37518/72 Heading H3T [Also in Division G3] A quartz crystal oscillator stabilized against supply voltage changes is characterized by the provision in the output of the drive circuit of loading-changing and non-linear resistance means, the latter being in series with a fixed resistance and the crystal input being connected to the common point. The loading- changing means causes the crystal to have different loadings in different parts of the oscillation cycle. Means are also provided for changing the width of the drive impulses to vary the durations of the parts of the cycle, and the arrangement is such that the phase rotation between input and output of the crystal is 360 degrees or an integral multiple thereof. In a first embodiment, a two-stage transistor amplifier 14, 15 is coupled to the oscillator crystal 11 via an emitter follower 20; resistor 18 varies the negative feed back around transistor 14, and so adjusts the drive pulse width. The latter may alternatively be varied by means of a variable resistor connected between collector and emitter of the emitter-follower, or between the positive supply line and base of the first transistor (14, Fig. 4, not shown). Alternatively a variable emitter circuit resistor may be used (Fig. 5, not shown). Instead of the emitterfollower, a diode may be used as coupling means (Fig. 3, not shown).
Patent GB-935706-A (GB)
Title: Fluorocarbon resin compositions
IPC: C08L27/18
Filed: 1960-11-02
Abstract: Compositions comprise a homogeneous colloidal blend of 65 to 99% by weight of polytetrafluoroethylene and complementally 35 to 1% of a copolymer of hexafluoropropylene and tetrafluoroethylene containing 6,5 to 27% by weight of the former and having a specific melt viscosity of between 1,5 X 103 and 3 X 105 poises.  The composition is stated to have better sintering properties than polytetrafluoroethylene alone. Blending may be effected by mixing aqueous dispersions of the polymer, coagulating, and separating the aqueous medium.  The blend may be stabilized, e.g. by end capping by treatment with water as described in Specification 929,970.  In powder form the blends may be paste extruded, e.g. to form sheets, films, pipes, rods and coatings on wire (in an example 19% of a commercial petroleum hydrocarbon mixture is added to form the paste) and as dispersions the blend may be used for casting films, spinning fibres and impregnating and coating woven and non-woven fabrics. Specifications 686,438 and 829,600 also are referred to.
Patent GB-1357563-A (GB)
Title: Torque limiting tools
IPC: F16D43/286
Filed: 1971-08-12
Abstract: 1357563 Power tool RATCLIFFE ENG CO Ltd 14 Aug 1972 [12 Aug 1971] 37856/71 Heading B3N A torque limiting tool comprises a motor M, a torque clutch having members 66, 68 arranged to vary an hydraulic pressure proportional to torque transmitted through the clutch, and means sensitive to said pressure attaining a predetermined value, arranged to stop drive to the clutch. In operation fluid pressure in reservoir 52 forces the members together. As torque transmitted increases member 66 is moved axially which in turn moves piston 36 to produce a back pressure in hydraulic line 57. This is transmitted via intensifier 56 and hydraulic line 90 to pressure switch 92. At a predetermined pressure switch 92 is tripped to cut off power to motor M. Clutch members 66, 68 do not completely disengage. The embodiment of Fig. 2, has the piston replaced by bellows 224 to which a rod 230 is connected. This rod can activate a trip valve not shown. In a further embodiment the motor moves in a casing to produce a pressure change or trip a switch in response to movement apart of two clutch members.
Patent GB-858986-A (GB)
Title: An improved projectile toy
Inventor: COLEMAN STEPHEN
IPC: A63H27/14
Filed: 1958-11-25
Abstract: 858,986. Projectile toys. COLEMAN Ltd., C. Oct. 5, 1959 [Nov. 25, 1958], No. 37889/58. Class 132(3). A projectile toy, such as a rocket, torpedo or gun, comprises a base section including a propulsion spring and a projectile section adapted to be telescoped with a part of the base section in such a manner as to compress the spring whereby, when the projectile is released, it is at first moved slowly outwards by the spring under the control of friction and/or suction after which it is hurled suddenly away from the base when the spring reasserts itself. As shown in Fig. 3, a toy rocket 8, which carries a satellite 9, is telescoped on a tube 2, integral with a launching platform 1, against the action of a spring 3 and is releaseably retained by interengaging lugs 14 and latches 15. On release, the rocket moves slowly due to frictional and suctional restraint until it has left a lower part 6 of the tube 2 of greater diameter than a part 7 when it moves quickly. The platform may be formed from polystyrene and the rocket from polythene and the rocket may have slightly projecting beads 16, Fig. 4, which act as an air seal.
Patent GB-1506331-A (GB)
Title: Liquid crystal display devices
IPC: G02F1/133
Filed: 1976-09-14
Abstract: 1506331 Matrix displays SIEMENS AG 14 Sept 1976 [22 Sept 1975 (2)] 37957/76 Heading G5C [Also in Division G2] In a display device in which cholesteric liquid crystal material with positive anisotropy is converted to a nematic phase by a magnetic or electric field above a threshold E cn , may be converted back to the cholesteric phase below a threshold E nc , and may have either phase at an intermediate field Eh, where E nc #E h <E cn , means are provided which can selectively apply any of the three field values to an addressed region of the liquid crystal material such that when the field E h  is applied, material surrounding the region receives a field greater than E cn . This maintains a border of nematic phase material which prevents more outlying cholesteric regions expanding into the addressed region when it is in its nematic state (the latter being only quasi-stable at E h ). The preferred embodiments are electrically addressed X-Y transmissive matrices, but alphanumeric segmented electrodes are also referred to. One or both sets of column and row electrodes are provided either with overlying electrode members (e.g. in the form of a ladder or longitudinal ribs at either side of each electrode strip), or an overlying dielectric island centred on each addressed region, or overlying continuous dielectric strip central of each electrode strip. Fig. 7 shows dielectric strips 11 and electrodes 3, arranged with tapering side edges, formed by etching two continuous superimposed layers for a limited period. The angle between the tapering edges is preferably greater than 20 degrees. The associated field distribution is shown at 16.
Patent GB-917427-A (GB)
Title: A process for lacquering metals
IPC: C08L67/06
Filed: 1959-11-09
Abstract: 917,427. Coated metals. DEUTSCHE GOLDUND SILBER-SCHEIDEANSTALT. Nov. 9, 1959 [Nov. 18, 1958], No. 37973/59. Class 140. A process for lacquering metals comprises coating the metals with a lacquer comprising at least one aliphatic ester of acrylic, methacrylic or ethacrylic acids the aliphatic residue of which contains 1 to 6 carbcn atoms, at least one unsaturated polyester resin, at least one polyvinyl ether, and a hardening catalyst. Catalysts specified are organic peroxides, optionally in combination with aromatic tertiary amines and/ or alpha-amino sulphones and promoters, e.g. compounds with labile halogen atoms and/or heavy metal compounds. Optional ingredients are non-polymerizable solvents, e.g. ethyl or butyl acetate, toluene or acetone; other monomers and polymers, e.g. styrene, vinyl toluene, vinyl acetate or other acrylic esters, polyvinyl chloride or acetate, or ketone-aldehyde resins; cross-linking monomers, e.g. glycol dimethacrylate, allyl methacrylate, diallyl phthalate or triallyl cyanurate; fillers, e.g. ground shale, barium sulphate or silica; paraffin. wax and pigments. The metal is preferably freed from grease, oil or dirt before applying the lacquer, which may be used as a prime coat for another lacquer. The lacquers may be prepared in two portions, the first containing the binding agents and perhaps the reducing portions and co-catalysts of a Redox system and the second the peroxidic catalysts and perhaps alpha-amino sulphones in a solvent or plasticizer, the two being mixed during or shortly prior to lacquering. Specification 830,835 which describes similar compositions and their use as adhesives is referred to.
Patent GB-1002624-A (GB)
Title: Improvements in or relating to type composing apparatus
Inventor: MAUCHEL DEREK JOHN
IPC: H04N3/02
Filed: 1963-09-27
Abstract: 1,002,624. Photographic composing-machines. COMMUNICATIONS PATENTS Ltd. Sept. 27, 1963, No. 38117/63. Heading B6W. [Also in Division H4] Relates to a type-composing apparatus in which selected alphanumeric characters are produced on the screen of a cathode-ray tube 10 and photographed by a reel of film 12, the characters being formed by scanning the tube under the control of frame- and line-component deflection signals applied at terminals 27-32 respectively, so as to form a conventional television-type scanning raster with the line direction transverse the length of reel 12, and by modulating the beam intensity in response to signals applied at terminal 44 which are derived by the photo-electric scanning of selected alpha-numeric characters in a matrix of such characters. In accordance with one aspect of the invention the reel is moved steadily in the direction 15 so as to permit the progressive build-up of a line of characters, and in order to prevent distortion of the recorded characters resulting from the movement, the raster traced on the screen of tube 10 is modified as shown in Fig. 3, by causing successive lines to be displaced through an appropriate distance 8 in the direction of movement 14 of the reel. The displacement is produced by an additional deflection signal which is added to the linecomponent signal in an amplifier 24. The signal is obtained by applying a direct potential of appropriate magnitude from a potentiometer 39 to an intergrating circuit comprising an amplifier 34 with a capacitor 35 connected between input and output. A relay 38 with contacts 37, 40 is controlled in accordance with a programme of operations to discharge capacitor 35 and set the additional signal to zero at the start of the scanning and reproduction of each character. At the end of the recording of a line of characters the reel is returned in the direction 15<SP>1</SP> to its initial position and is advanced in the direction 16 through the height of one line. Distortion of characters by variation in the speed of the transport mechanism of reel 12, due, for example, to fluctuations in voltage of the electric supply to a motor for the mechanism, is reduced by a D.C. feed-back signal obtained from a tacho-generator 45 coupled to the motor shaft 46. According to another aspect of the invention (not illustrated), the reel is not subjected to movement in the direction 15, the necessary displacement of successive characters being produced instead by an arrangement of moving mirrors or prisms. Distortion of the recorded characters is prevented by an arrangement as described above. Reference is also made to apparatus in which both the film and optical apparatus move.
Patent GB-1123028-A (GB)
Title: Electrical control device
Inventor: HARVEY ERIC ALFRED
IPC: H01C10/32
Filed: 1965-09-07
Abstract: 1,123,028. Electrical control devices. ILFORD Ltd. 5 Oct., 1966 [7 Sept., 1965], No. 38182/65. Heading H3Q. [Also in Divisions F2 and H1] A control device 10 comprises two relatively rotatable members 11, 12 the relative angular position of which determines the value of an electrical parameter (e.g. resistance or voltage), and a rotatable control member (a knob attached to shaft 21) for effecting relative rotation of members 11, 12, whereby the relative angular displacement of members 11, 12 varies logarithmically with the amount of rotation of the control member. In the embodiments described, a linear variable potentiometer 10 having a casing 11 and a rotatable spindle 12 is employed, the spindle 12 being rigidly attached to an arm 20 which is rotated by the control member attached to shaft 21. An arm 26 is rigidly attached to casing 11 and pivoted at 29 to one end of a further arm 27, the other end of which is pivoted to a fixed point 28. The linkage 26, 27 is arranged such that the relative angular displacement of spindle 12 and casing 11 bears a logarithmic relation to the amount of rotation of the control member (shaft 21). For reasons of convenience of space shaft 21 and spindle 12 may be unitary (Figs. 8, 9, not shown) and also rotate, through a gear train (35, 36, 37), an arm (33) in the same direction as shaft 21. The arm (33) has pivoted at its extremity one end of link 27, the other end of which is pivoted to the extremity of arm 26.
Patent GB-902308-A (GB)
Title: Improvements relating to the production of nickel carbonyl
Inventor: TOWNSHEND STANLEY CHARLES
IPC: C01G53/02
Filed: 1960-06-08
Abstract: In the production of nickel carbonyl by reducing oxidic nickel-containing material, introducing sulphur into the reduced material to give a sulphur content of 0,8 to 2,5% by weight and treating the resultant sulphur-containing reduced material with carbon monoxide at atmospheric or fairly low superatmospheric pressure, e.g. 5 atmospheres, the reduction is effected at 350 DEG to 500 DEG  C., with the introduction of sulphur if necessary, to yield a reduced material containing a minor proportion of the final sulphur content, amounting to at least 0,3%, e.g. 0,4 to 0,8%, the remainder of the final sulphur content being introduced into the reduced material at below 300 DEG  C. during reduction.  Sulphur may be introduced by adding SO2 or other gaseous sulphiding agent, e.g. H2S, to the reducing gas employed, or by adding elemental sulphur, or reduction may be carried out using water gas containing sulphur, or the oxidic nickel-containing material may be an incompletely roasted material containing some or all of the minor proportion of sulphur. The introduction of sulphur into the reduced material may be effected by treating it with hydrogen containing between 0,5 and 25% SO2 at a temperature of 60 DEG  to 300 DEG C., e.g. 100 DEG -200 DEG C. Specification 347,208 also is referred to.
Patent GB-926318-A (GB)
Title: Improvements in or relating to gas cookers
Inventor: BULLOCK ARTHUR DANIEL JOSEPH
IPC: F24C3/08
Filed: 1960-11-08
Abstract: 926,318. Gas cooking ovens. GAS COUNCIL. Dec. 12, 1961 [Nov. 8, 1960], No. 38387/60. Class 126. In a gas fired cooking apparatus of the kind wherein a burner is disposed adjacent the bottom of at least one of the upright walls of the oven, the burner is of a single jet type of approximately the same heating capacity as a normal multi-jet burner tube employed in an oven of similar proportions. In the form shown the invention is applied to a domestic cooker, the oven chamber having top, bottom, and rear walls 10, 11, 13 respectively. A trough 16 extends downwardly from the bottom 11 of the oven adjacent to the back wall 13 and has its front wall extended a short distance above the bottom 11 of the oven compartment as shown at 19. A single non-aerated, flat-flame burner 17 extends centrally through the bottom of the trough. The axis of the jet tube may be inclined upwardly and forwardly with or without a deflector plate between it and the rear wall. In a modification, for a gas cooking apparatus of commercial application, a single burner is arranged below the oven and at the front thereof and is arranged to project a single substantially horizontal flame towards the centre of the oven and wherein a horizontal baffle is disposed above the flame and a vertical baffle is disposed away from the rear wall of the oven so that the flame or products of combustion sweep upwardly after initially avoiding contact with the material being cooked.
Patent GB-1524027-A (GB)
Title: Colour radiographic silver halide process
IPC: G03C7/30
Filed: 1974-09-03
Abstract: 1524027 Colour radiographic silver halide process AGFA-GEVAERT 3 Sept 1975 [3 Sept 1974] 38487/74 Heading G2C A radiographic process comprises (1) imagewise exposing to penetrating radiation a screenfilm system comprising, between 2 fluorescent intensifying screens for absorbing penetrating radiation and converting it to light to which the photographic material (below) is sensitive, a photographic material comprising on each side of a transparent support at least one silver halide emulsion layer, the aggregate amount of silver halide in the material being equivalent to 1À3-5À0 g AgNO 3  per m<SP>2</SP>, the silver halide grain size distribution being such that at least 50 wt. per cent of the silver halide at each side of the support has a mean grain size smaller than 0À55 Ám, the silver halide emulsion layer(s) on each side of the support containing at least at the development stage a colour coupler(s) capable of forming with an oxidized p-phenylenediamine colour developing agent a dye, such coupler(s) being present in an amount sufficient to permit a combined dye and silver image having in respect of visual filter light (defined) an integrated optical density of at least 2À0 to be formed in the material by exposure and colour development at 41‹C for 45 seconds in a bath of p-phenylenediamine developing agent defined in the Specification and (2) colour developing to produce a combined dye and silver image having an integrated optical density in respect of such visual filter light. The silver halide emulsion layers may contain an amount of AgCl grains with a photographic speed so low that no visible image is produced by means of such grains as a result of the exposure and development steps above. Details of the silver halide emulsions used are disclosed. The silver halide may be spectrally sensitized with a sensitizing dye (see Example 3). For a given silver halide coverage the small grain size used in the present invention reduces cross-over effects (i.e. light from one intensifying screen irradiating the emulsion layer on the opposite side of the support).
Patent GB-1151824-A (GB)
Title: Improvements in or relating to Coke Oven Doors.
IPC: C10B25/12
Filed: 1967-08-24
Abstract: 1,151,824. Coke oven doors. SIMONCARVES Ltd. 24 Aug., 1967 [25 Aug., 1966], No. 38963/67. Heading C5E. A door assembly for a horizontal coke oven includes a plurality of first catch devices 20 . . . 22 each adapted in the closed position to engage a second catch device 15 fixed to the door frame 12, each device 22 being adapted to engage pressure-distributing means which contact the door 50 above and below the device 22 so that the weight of the door provides sealing pressure via the devices 15, 20 . . . 22, and the pressure-distributing means. These means comprise pairs of plates 30 extending above and below pins 20, 22, see Fig. 4 (not shown), and secured as by pins 32 to limbs 17 on the door, the plates 30 being joined at the level of the pins 22 by a plate 35 bearing spaced members 37. Pressure is transmitted from the pin 22 via parts 37, 35, 30 to the door parts 17, 16. Conventional means 24 . . . (29) are provided for equalizing the pressure exerted by the different pins 20, see Fig. 1 (not shown). In a modification, see Figs. 7 to 10 (not shown), the parts 37 are omitted and the pin 22 bears against the walls of slots (142) in the plates 30.