baber/WOPTO huggingface dataset:
Patent GB-1049147-A (GB)
Title: Improvements in refractory metal articles
Inventor: LLEWELYN GEIRIONYDD
IPC: C23C10/56
Filed: 1964-02-19
Abstract: The subject-matter of this Specification is the same as that described in the parent Specification except that the chromium, silicon, and aluminium layer is provided on a body of at least 50% tantalum, instead of niobium, and the preferred composition of the layer (by weight) is 47.5% chromium, 47.5% silicon, and 5% aluminium.
Patent GB-575847-A (GB)
Title: Improvements in or relating to boiler furnaces
IPC: F23K3/00
Filed: 1944-04-15
Abstract: 575,847. Controlling air supply. HEYWOOD AIR-TIGHT DAMPER CO., Ltd., and HEYWOOD, T. April 15, 1944, No. 6974. [Class 51 (i)] In a boiler furnace wherein the opening of the firedoor closes the air supply valve and vice versa, the fire door 1 is provided with a pivoted arm 2 having a tooth 4 which, when the door is opened or closed, engages with a notch 6 in a quadrant 5 associated with the air supply valve 7. As the door opens the arm 2 slides through a guide 3 and the tooth 4 enters the notch 6 subsequently leaving it as the quadrant is rotated and the valve is closed. As the door is closed the tooth again enters the notch and serves to open the valve. A spring pressed plunger 8 engages with the arm, to ensure engagement of the tooth with the notch. The valve may be operated independently of the door by a handle 9.
Patent GB-660160-A (GB)
Title: The purification of tetraethyl thiuram disulphide
Filed: 1949-03-14
Abstract: In a process of purifying tetraethyl thiuram disulphide the tetraethyl thiuram disulphide is dissolved in a solvent which consists of carbon tetrachloride or contains at least a sufficient quantity thereof to secure the recrystallization of tetraethyl thiuram disulphide therefrom in the form of crystals containing two molecules of CCl4 to one molecule of tetraethyl thiuram disulphide, recrystallizing, removing the crystals from the mother liquor, and allowing them to give off the carbon tetrachloride.  The starting material is dissolved in the solvent at a temperature between room temperature and the boiling point of the solvent and then either the solution is cooled or evaporated at unchanged temperature until crystallization takes place or a supersaturated solution is obtained. Crystallization may take place spontaneously or may be induced by known methods. The crystals obtained contain 2 molecules of carbon tetrachloride of crystallization whether obtained by crystallization from carbon tetrachloride alone or in admixture with other solvents which do not change the solubility of tetraethyl thiuram disulphide unfavourably.  Mixtures containing 96 per cent ethyl alcohol and carbon tetrachloride in equal proportions or with less alcohol are suitable.  The crystals are purified particularly from contaminations with compounds of heavy metals.  In examples (1) and (2) tetraethyl thiuram disulphide is dissolved in carbon tetrachloride with warming, the solution is cooled and inoculated with a crystal of the desired product, the scales formed are removed, washed with carbon tetrachloride and dried at room temperature and then at 40 DEG  C.; (3) a similar purification is carried out using equal parts of carbon tetrachloride and 96 per cent alcohol.
Patent GB-794618-A (GB)
Title: Pyridine purification process
Inventor: BOWER JOHN DELL
IPC: C07D213/06
Filed: 1956-03-07
Abstract: 794,618. Purification of pyridine. DISTILLERS CO., Ltd. Feb. 13, 1957 [March 7, 1956], No. 7086/56. Class 2 (3). Crude pyridine produced by the vapour-phase reaction between formaldehyde, acetaldehyde and ammonia is purified by a process comprising heating the crude pyridine at an elevated temperature with an aqueous solution of an alkali metal hydroxide, distilling the resulting mixture to remove a distillate containing the impurities present in the crude pyridine and recovering the pyridine from the distillation residue. The pyridine is preferably recovered by azeotropic distillation, for example by cooling the residue, adding a suitable azeotroping agent, which is preferably benzene, refluxing the mixture until the conditions in the distillation column have reached equilibrium and separately collecting the several fractions of distillate obtained on gradually increasing the temperature. The preferred alkali metal hydroxides are sodium and potassium hydroxides.
Patent GB-610316-A (GB)
Title: Process and apparatus for converting a bundle of continuous filaments into a sliver or roving of staple fibre
IPC: D01G1/10
Filed: 1945-03-21
Abstract: 610,316. Stapling continuous filaments. RHODES. C., and McCART, I. N. March 21, 1945, No. 7090. [Class 120(iii)] A sliver of overlapped staple fibres is produced from a bundle of continuous filaments by the repeated steps of feeding the bundle in spread condition sufficiently to lay a holdable leading end thereof in the required overlapped relation onto a preceding severed length, holding such end thereon, then continuing feeding and laying the remainder of the required length, and finally severing such length whilst said leading end is still held. As shown, the end of a bundle 10, which has been spread fanwise by two or more rotating endless belt 'brushes (not shown) which diverge in the direction of motion, is held on the surface of a belt 25 by a foot 27 whilst the bundle is fed and laid on the belt by rollers 17 which are traversed on a carriage 20. The length is then severed by a rotating knife 32, and the belt is moved between each stapling operation so that the cut lengths are overlapped. Knife 32 is spring-influenced and sweeps across to coact with a fixed inclined cutting edge to sever the filaments. One of the rollers 17 is driven on the feeding stroke by racks and pinions 23, 22, ratchet clutches disengaging the drive on the return stroke. Foot 27 lifts during the feeding stroke of the carriage and belt 25 is advanced during the return stroke. The sliver formed by the successive overlapped cut lengths is taken off belt 25 for delivery to a suitable container. Carriage 20 may be double-acting with duplicate holding and cutting motions so as to lay successive lengths in both directions. The lapping may be arranged for take-off in either direction.
Patent GB-910730-A (GB)
Title: Method of purifying terephthalic acid
Filed: 1961-02-27
Abstract: Terephthalic acid containing p-toluic acid is purified by treating with an aqueous solution of a soluble calcium salt or with calcium hydroxide and separating insoluble calcium terephthalate from soluble calcium toluate, the terephthalate being treated with aqueous HCl to obtain the free acid. Preferably the crude terephthalic acid is first solubilized by dissolving in an aqueous alkaline or ammonia solution; it may be suspended in water and treated with aqueous NaOH.  By acidifying the filtrate, p-toluic acid is isolated.
Patent GB-684142-A (GB)
Title: Venetian blind bar and method for forming same
IPC: E06B9/386
Filed: 1951-03-27
Abstract: 684,142. Venetian blinds. LEVOLOR LORENTZEN, Inc. March 27, 1951 [March 27, 1950]. No. 7099/51. Classes 20 (ii) and 20 (iii). [Also in Group XXII]. Venetian blind bar stock is formed from strip stock which is zinc-coated and provided with a surface coating of thermoplastic resin paint. The bar stock 6 has a flat base 7, central ribs 10 and inwardly directed longitudinal edges 9. When incorporated into a Venetian blind, a cover member engages under the edges 9 and presses against the tops of the ribs 10. The paint may be, for example, enamel of the alkyl or vinyl resin type, and is preferably about 0.0008 inch thick on the outer surface and edges of the channel, and about 0.0001 inch thick on the inner surface. Specification 659,017 is referred to.
Patent GB-1459385-A (GB)
Title: Glass fibres
IPC: C03C3/076
Filed: 1973-02-14
Abstract: 1459385 Glass fibre composition; fibre reinforced cement TURNER & NEWALL Ltd 8 Feb 1974 [14 Feb 1973] 7151/73 Headings C1M and C1H [Also in Division C3] An alkali resistant glass fibre consists of, in weight per cent where R is Li, Na and/or K and R<SP>1</SP> is Mg, Ca, Sr and/or Ba. The fibres may be used as reinforcement for alkaline cementitious material, in an amount up to 30% by weight (based on total dry solids) of the material.
Patent GB-1327163-A (GB)
Title: Indoor-outdoor tennis game
IPC: A63B67/04
Filed: 1972-02-16
Abstract: 1327163 Table tennis game H HARTFORD 16 Feb 1972 [22 Feb 1971] 7176/72 Heading A6H An apparatus for playing a table tennis type ball game comprises two playing counts 10 supported above ground (e.g. on legs 11) and a ball deflector 16 extending between, but below the level of, the courts 10. The deflector 16 may be a net or inclined boards 40 (see Fig. 6). The courts 10 may each comprise two tables releasably connected. The courts may be permanently or releasably connected together by telescopic rods 15, 17. Each court 10 can have a ball storage rack 25. For outdoor games, the legs 11 may be provided with spikes (not shown).
Patent GB-450335-A (GB)
Title: A control system for beat valves in multi cylinder fluid pressure engines
IPC: F01L9/10
Filed: 1935-03-08
Abstract: 450,335. Engine cylinders, valves, and valve - gear. COMPAGNIE DES SURCHAUFFEURS, 3, Rue La Boetie, Paris. March 8, 1935, No. 7254. Convention date, March 13, 1934. [Classes 122 (i) and 122 (ii)] A multiple-cylinder engine has lift admission valves 2 coaxial with and closing the cylinder ends, which are actuated by auxiliary piston 8 raised or moved in both directions by liquid controlled by cam-operated slide valves or auxiliary rotary valves. The cams or the ports in the auxiliary rotary valves are shaped to permit adjustment. In the construction shown in Fig. 1, the exhaust ports 3 are controlled by the pistons, and the exhaust passes around the cylinders 1 which are surrounded by a common casing 4. The cover 6 of the cylinders forms a reservoir for pressure oil in which the camshaft 26 is mounted. Cams 27, 28, Fig. 3, are mounted on the shaft and operate rollers 23, 22 through a collar 21 connected thereto to reciprocate an auxiliary piston valve 20 which puts the ends of the auxiliary cylinder 9 alternately under liquid pressure, and to exhaust through port 17. The cams are of variable profile. In a modification, auxiliary rotary valves comprising a single member act as a reservoir, and are provided with admission controlling ports and exhaust controlling cavities so shaped as to permit adjustment by longitudinally moving the valve member. The oil pressure is greater than the steam pressure, so that leakage of oil, which may be of a definite magnitude, ensures lubrication. The time of admission may also be varied, and exhaust valves may be similarly operated.
Patent GB-623127-A (GB)
Title: Improvements in or relating to splitting or evening machines
IPC: A43D8/48
Filed: 1947-03-15
Abstract: 623,127. Leather splitting. BRITISH UNITED SHOE MACHINERY CO., Ltd., (United Shoe Machinery Corporation). March 15, 1947, No. 7255. [Class 31 (i)] A leather splitting or evening machine comprises a knife, a pair of power-driven rolls for feeding a work-piece to the knife and so located relatively to the knife that before a work-piece is presented to the bite of the rolls the knife edge lies relatively close to a plane including the axes of the rolls, yielding means for urging one of the rolls towards the other roll and means allowing pressure exerted on the knife during continued advance of the work, after the leading end. of the work-piece has passed between the rolls and has engaged the knife edge, to cause relative movement between the knife edge and the plane, increasing the distance between the knife edge and the plane and on completion of the operation the initial relation between the knife edge and the plane is restored. The yielding roll may be moved away from the knife or the knife away from the rolls. A gauge roll 5, Fig. 1, is mounted on blocks having upper wedge-shaped faces engaging corresponding faces on blocks on a bar 9. Movement of the bar 9 to the right or left by a hand wheel 13 through a screw and nut varies the vertical distance of the roll 5 from the knife blade. As shown in Figs. 1 and 3, when the roll may move away from the knife, applied to a skiving machine of the type described in Specification 21977/03, [Class 31], the pressure roll 6 is mounted at either end in bearing blocks 29 which are slidable in forked members 31, 131, springs 17, 117 tending to force the blocks and rolls upward. Upward movement is limited by bars 18 impinging on screws 16 on the members 31, 131. Each forked member is mounted at its lower end on a rotatable spindle 27 parallel to the roll 6. The pivoted movement of the forked members is limited by screws 41, 43 and is normally held to the right, Fig. 3, by a spring-loaded screw 45. In the non- working position the roll 6 is centred at 51, its upper periphery impinging on the knife blade 19. On work 100 being inserted by power rotation of the rolls 5, 6, the roll 6 is forced downward against the springs 17, 117 and is centred at 53. As the work 100 progresses through the machine by rotation of the rolls, the roll 6 runs along the work and becomes centred at 55. In the modification, Fig. 5, the plane of the rolls is fixed and the knife 161 moves away from the rolls 147, 153. The knife 161 is mounted on a carrier 163 capable of pivotal movement about a spindle 165 parallel to the rolls. The knife and its carrier are normally held to the left by a spring-loaded plunger 167 against an adjustable stop 173. On introduction of the work 102 the pressure roll 147, being spring-mounted, moves downward to accommodate it and the rolls force the work against the knife 161 which moves to the right against the action of the plunger 167 until the carrier 163 impinges on an adjustable stop 175.
Patent GB-370992-A (GB)
Title: Improvements in rotary cutters for lawn mowers
IPC: A01D34/42
Filed: 1931-01-03
Abstract: 370,992. Lawn-mowers. JERRAM, A. E., Inglenook, The Oval, Oadby, near Leicester. Jan. 3, 1931, No. 7385/32. Divided on 370,485. [Class 6 (ii).] Rotary cutters for lawn-mowers comprise a shaft A having steel discs B welded or brazed thereto and one or more series of spiral blades C somewhat longer than the distance between adjacent discs, each blade being electrically butt-welded at each end to the discs on that surface remote from its cutting edge. The blades C are made from wedge-shape section steel-strip being narrow at the edge and thickened at the base. Each blade in turn is held at each end for welding by clamping devices on the welder opposite the discs, the shaft being supported in insulated bearings. The electric circuit is completed by copper blocks contacting with the shaft, projecting forward from the side of the cutter opposite to the blade clamp. The blades are uneven in number to facilitate the insertion of the blocks. The heating may be prevented from spreading to the cutting edge by an air blast or water circulation.
Patent GB-681212-A (GB)
Title: Improvements in or relating to photomechanical reproduction
Inventor: GRESHAM DONALD CHARLES
IPC: G03F3/10
Filed: 1950-03-24
Abstract: 681,212. Photo - mechanical processes. McCORQUODALE & CO., Ltd. Feb. 9, 1951 [March 24, 1950], No. 7408/50. Drawings to Specification. Class 98 (ii). A process for the production of tone-corrected screen positives comprises exposing behind a half-tone screen in a process camera to light from an original subject a photographic element comprising a support carrying on one side two photographic emulsion layers in contact or separated by a thin layer, the outer layer being capable of recording light of a colour to which the inner emulsion layer does not record and being removable from the element thereby to form a latent screen negative image in the outer layer, developing said image to a low gamma, printing said image on to the inner emulsion layer, the printing exposure being purely to uniform light and partly in the camera to light from the original subject, developing the screen positive image thus obtained to a high gamma and removing the screen negative therefrom. The emulsion layers are preferably differentially sensitive. The outer layer may be green or red sensitive and the inner layer sensitive only to blue light and the original exposure may be made through a yellow filter and the printing exposure without a filter. Alternatively, a filter layer may be placed between the emulsions, this filter absorbing light to which the inner emulsion is sensitive and being removable by the first developer used. Preferably, the outer emulsion is panchromatic and formed in unhardened gelatine and the inner emulsion is formed in hardened gelatine and is also panchromatic, so that the outer emulsion can be removed by washing in warm water after the printing step. In another form, the filter layer comprises a wet or dry stripping layer. Colour separation screen positives may be produced by the process and the colour rendering thereof may be connected as described in Specifications 681,206 and 681,207. The screen negatives are preferably developed in a metol-hydraquinone developer containing benzotriazol and the positive images may be developed in a solution of hydroquinone, potassium metabisulphite, potassium bromide and potassium hydroxide.
Patent GB-759585-A (GB)
Title: Improvements in and relating to accelerometers
Inventor: MACKENZIE THOMAS HERBERT
IPC: G01P15/13
Filed: 1952-03-24
Abstract: 759,585. Electric measuring systems. BRITISH THOMSON-HOUSTON CO., Ltd. March 24, 1953 [March 24, 1952], No. 7519/52. Class 40(1) An accelerometer comprises a movable armature centrally mounted between two pairs of salient poles the axes of which are perpendicular, one pair of poles carrying A.C. energized coils and the other pair of coils in which current is induced when the armature is displaced from a mutual position along the axis of the first pair of poles, means being provided for producing from this current a voltage of such sense and magnitude that when applied to the coils on the first pair of poles creates a force tending to restore the armature, this voltage being used as a measure of acceleration along the axis of the first pair of poles. For measuring acceleration along the direction x-x only, Fig. 1, current from an A.C. source 4 flowing in the motor windings 14 and 15 induces an e.m.f. in opposing position-sensing coils 16 and 17, the resultant phase and magnitude of which correspond to the direction and magnitude of the armature displacement from its zero-central position. This e.m.f. is amplified at 5 and fed through a phase-sensitive detector 6 stabilizer network 7 and amplifier 8 to coils 14 and 15. The interaction of the flux produced by this current and by a fixed D.C., from source 12 in the opposed coils 16 and 17 causes a restoring force on the armature which balances the accelerating force. The output of detector 6, which is thus proportional to the acceleration, is measured at 9, 10. In a modification for measuring mutually perpendicular acceleration components Fig. 2, a further four coils 19, 20, 21 22 having similar functions to those described above are mounted so that the two pairs of motor coils 14, 15 and 20, 22 are on poles at right angles to each other as are the pairs 16, 17 and 19, 21 of position sensing coils. The two pairs of motor coils are supplied from respective sources 4, 4<SP>1</SP>, with currents of different frequency or of the same frequency but in phase quadrature so that the induced currents in the two pairs of position sensing coils, which are amplified together at 5, produce outputs only in appropriate detector 6, 6<SP>1</SP>, and motor coils, these outputs being proportional respectively to the components along the axes of these coils and measured at 9-10, 9<SP>1</SP>-10<SP>1</SP>.
Patent GB-1072921-A (GB)
Title: Improvements relating to function generators
Inventor: PERCIVAL WILLIAM SPENCER
IPC: G06G7/28
Filed: 1963-02-26
Abstract: 1,072,921. Electric analogue calculating. ELECTRIC & MUSICAL INDUSTRIES Ltd. Feb. 26, 1964 [Feb. 26, 1963], No. 7565/63. Heading G4G. A break-point diode function generator is provided with an oscillator 10 which causes the transfer function to oscillate between a first and a second value, to provide a smooth transition between adjacent linear approximations of the transfer function. Each group of resistors 5, 7, 8 determines a particular linear transfer function a, b, c, Fig. 2, approximating to the required transfer relationship, the transition point being S, T. Considering operation near point S, oscillator 10 produces a triangular waveform oscillation having peak amplitude H which is connected via resistor 11A to diode 6A, and an antiphase oscillation of amplitude K connected via resistor 11B to diode 6B. Due to the switching action of the diodes the output waveform produced corresponds to the full line portions h, k having an average value n, so that the working point corresponding to input r is N instead of L, the value LN being a function of LM. Any components of the output at the frequency of oscillator 10 are removed by filter 13. Waveforms other than triangular may be used, and the oscillator 10 may be connected to all diodes in the same phase, or may be connected only to alternate diodes.
Patent GB-1418934-A (GB)
Title: Apparatus for testing potentiometers
IPC: G01R31/28
Filed: 1973-02-15
Abstract: 1418934 Testing potentiometers BUNKER RAMO CORP 15 Feb 1973 [17 Feb 1972] 7567/73 Heading G1U In a device for testing potentiometers each potentiometer is conveyed successively (a) from a loading station Fig.1, to a first station at which its wiper is first set to its datum position and then moved forwards and backwards over its entire range so as to remove any surface oxide, (b) from the first station to a second station where a test signal is applied to the potentiometer and the resulting output signal is displayed on a c.r.t., (c) from the second station to an ejection station where it is ejected into an appropriate bin in accordance with whether an operator - in response to his assesment of the quality of the potentiometer from the c.r.t. display - depresses an 'accept' or 'reject' key. The test made upon the potentiometer 18, Fig.12, when it is at the second station, consists in applying a constant current J to the potentiometer, as shown, and then moving its wiper C over its full range. If the potentiometer is perfect, this will result in the display of a horizontal line of the correct length on the c.r.t. 4 since the potential across the y-plate should remain zero. However, if the potentiometer is noisy then the line will be fuzzy, Figs.13a, 13e (not shown), and if the initial position of the wiper does not correspond to the end of the resistive track the initial part of the line will be inclined, Fig.13c (not shown), and if there is a break in the resistive track there will be large bleeps in the line, Fig. 13d (not shown). The Specification outlines suitable mechanism for moving and manipulating potentiometers under test. This includes a disc 9, Fig.1, details Fig.6 (not shown) capable of holding four potentiometers at four equally spaced positions around its periphery. Potentiometers are loaded into the disc by a mechanism 11, and on depression of a foot-switch by an operator the disc is rotated by a quarter of a revolution by a geneva drive arrangement, Fig.5 (not shown), so as to advance each potentiometer held in the disc by one station, At the first station a screw-driver bit (54') Fig.10 (not shown) is protruded into the end of the wiper spindle of the potentiometer and the wiper is moved to its datum position, this being recognised by a circuit, Fig. 11, in which a constant voltage U is applied across the potentiometer 18, and the voltage from its wiper C is compared D with that from a pre-set reference potentiometer 18a, and a drive motor 70 is energized until equality in the voltages is obtained. The screw-driver bit is then rotated over a pre-set arcuate amount, determined by photo-electric limit detectors, so as to remove any surface oxide from the resistive track. At the second station another screw-driver bit rotates the wiper so as to perform the electrical test, and at the ejection station 8, Fig.1, a potentiometer is ejected into whichever bin the operation selects.