baber/WOPTO huggingface dataset:
Patent GB-818308-A (GB)
Title: Improvements in and relating to the production of polymerisation catalysts and of polyethylenes
Inventor: ROBINSON ROBERT
IPC: C08F10/00
Filed: 1956-11-20
Abstract: A polymerization catalyst is prepared by mixing (i) a titanium tetrahalide; (ii) less than a molar proportion (in relation to the tetrahalide) of an aluminium dialkyl monohalide; and (iii) an aluminium monoalkyl dihalide.  The molar ratio of aluminium dialkyl monohalide to the titanium compound may be between 0.3 and 0.9, and the molar ratio of the aluminium dialkyl halide to the aluminium alkyl dihalide may be between 0.15 and 1.  The catalyst components are mixed in a non-aromatic hydrocarbon solvent in a concentration such that there are between 5 and 15 millimols. of titanium tetrahalide per litre of solvent.  In examples, ethylene is polymerized using catalysts obtained by mixing titanium tetrachloride, aluminium diethyl chloride, and aluminium ethyl dichloride, in iso-octane.ALSO:Ethylene is polymerized in the presence of a catalyst prepared by mixing (i) a titanium tetrahalide, (ii) less than a molar proportion (in relation to the tetrahalide) of an aluminium dialkyl monohalide, and (iii) an aluminium monoalkyl dihalide. The molar ratio of aluminium dialkyl monohalide to the titanium compound may be between 0.3 and 0.9, and the molar ratio of the aluminium dialkyl halide to the aluminium alkyl dihalide may be between 0.15 and 1.  The catalyst components are mixed in a non-aromatic hydrocarbon solvent in a concentration such that there are between 5 and 15 millimols. of titanium tetrahalide per litre of solvent.  Polymerization is effected at 30 DEG  to 50 DEG  C. and at a pressure of up to 5 atmospheres.  In examples, ethylene is polymerized using catalysts obtained by mixing titanium tetrachloride, aluminium diethyl chloride, and aluminium ethyl dichloride, in isooctane.
Patent GB-812539-A (GB)
Title: Tool holder
IPC: B23C5/24
Filed: 1957-11-15
Abstract: 812,539. Cutters. HAHN, E., [trading as INDEX-WERKE K.G. HAHN & TESSKY]. Nov. 15, 1957 [Jan. 29, 1957], No. 35616/57. Class 83 (3). A tool-holder comprises a pair of screws 37, 38 at an acute angle to each other, bearing on seatings on a bit clamping member 30, the seatings being at an obtuse angle to each other. The holder body 21 is clamped to a rotatable head 12 by a screw 22 engaging a nut 14 sliding in a T-groove 13. The position of the body is determined by a screw 25 abutting a stop 16. The body 21 and head 12 have interengaging serrations on their abutting surfaces. Similar serrations are provided between the bit 29 and the member 30. The body 21 may be removed, rotated through 180 degrees and re-clamped to the head 12. The bit may also be reversed and re-clamped by inserting the screws 37, 38 in bores 40, 41. Two similar holders are provided on the head 12.
Patent GB-485742-A (GB)
Title: An improved process of preparing products from c, c-disubstituted barbituric acids and 1-phenyl-2, 3-dimethyl-4-dimethylamino-5-pyrazolone capable of being formed into tablets
Filed: 1937-12-24
Abstract: Compounds of C : C-disubstituted barbituric acids and 1-phenyl-2 : 3-dimethyl-4-dimethylamino-5-pyrazolone are prepared in a form capable of ready conversion into tablets by melting the components together in the molecular ratio of 1 : 2 at water-bath temperature, with the addition of 10-20 per cent of their total weight of water or of a dilute aqueous solution of gelatin or agar-agar, after which the mass is cooled, granulated and dried. Examples are given of the use of diethyl-, diallyl- and phenylallyl-barbituric acids.
Patent GB-175490-A (GB)
Title: Method of and apparatus for taking and reproducing kinematographic pictures with musical accompaniment
IPC: G03B31/02
Filed: 1920-12-21
Abstract: 175,490. Springefeld, O., and Czerny, L. Dec. 21, 1920. Metronomes a n d other time-indicators.- Kinematograph films bearing pictures and a representation of the musical accompaniment are produced by arranging a travelling band bearing the representation either below, above, or at the side of the scene photographed; in projection, the musical representation is hidden from the public, but is visible to the orchestra. The band is carried by rollers, and may be driven through worm gearing by a motor controlled by a rheostat. Fig. 3 shows a projection screen 12, of which the part 13 bearing the projected musical representation is hidden from the public by a wall 14 but is visible to the conductor of the orchestra.
Patent GB-433358-A (GB)
Title: Improvements in spectacle or like cases
IPC: A45C11/06
Filed: 1934-12-14
Abstract: 433,358. Spectacle &c. cases. LESSAR BROS., Ltd., and LESSAR, H. L., Hylton Street, Birmingham. Dec. 14, 1934, No. 35894. [Class 18] [See also Groups XX and XXII] A spectacle &c. case formed of stiff material e.g. metal, and provided with an ornamental covering, has a U-shaped strip 3, Fig. 1, fixed around the free edge of the lid so as to lie on each side thereof and also outside the covering material. The strip is formed with recesses 3b or inturned edges to grip the covering material. The outside covering is carried round the edge of the lid where the inside covering overlies it, or, alternatively, both coverings may be carried round giving a thickened edge. In fixing the metal strip, it is bent to U -form and each end is shaped to correspond with the outline of the lid on a former 6, Fig. 4, where one end of the strip is placed against a stop 10, and a sliding presser 7 actuated by a handle 9 presses the strip around the former. After the strip has been positioned round the lid 1, Fig. 7, the latter is placed in a female die 13 and a male die 14 descends and presses on the edge of the lid to clamp the strip in position. Indentations can be formed in the strip by means of projections on the press tools.
Patent GB-805332-A (GB)
Title: Improvements in or relating to buffer couplings for railroad vehicles
Inventor: LODGE EDWARD
IPC: B61G1/14
Filed: 1954-12-11
Abstract: 805,332. Couplings. INGHAM & SONS, Ltd., J. March 12, 1956 [Dec. 11, 1954], No. 35924/54. Class 103(5) A coupling head 1 is provided with a coupling member 4 pivoted about a vertical shaft 6 and rotatable by means of a handle 8. The enlarged head 5 of the coupling member engages a slot in the head of a mating coupler and is retained therein by a catch member 13. The spring 10 is connected between extensions 9 and 11 secured to the catch member and coupling member to hold them in the engaged or disengaged positions.
Patent GB-1099438-A (GB)
Title: Improvements in or relating to electrical cables
IPC: H01B9/00
Filed: 1965-08-21
Abstract: 1,099,438. Electric cables. G. H. HAWKRIDGE. Aug. 8, 1966 [Aug. 21, 1965], No. 35965/65. Heading H1A. The domestic wiring cable shown has two conductors, one, A, separately insulated at B serves as the current carrying conductor and the other, a bare conductor D, acts as the earth wire. Both conductors are embedded in an outer sheathing C. An arrangement with a figure eight cross-section is also described (Fig. 2, not shown). The insulation is P.V.C.
Patent GB-497707-A (GB)
Title: Improvements relating to gyroscopic instruments
IPC: G01C19/38
Filed: 1937-06-17
Abstract: 497,707. Bearing mounts. SPERRY GYROSCOPE CO., Ltd., HARDING, W. G., and NISBET, R. H. June 17, 1937, No. 36009/38. Divided out of 497,584. [Class 12 (i)] [Also in Group XX] The bearings in a gyroscopic instrument have resiliency in three perpendicular directions in order to reduce damage due to the vibrations of the rotor. As shown, conical pivots 89 on the rotor casing 1 form the inner races of ballbearings 90, the outer races 91 of which are housed in conical plugs 92. The latter are held in conical hollows in socket members 93 by flanged nuts 94 screwed into the plugs 92 and secured by split pins 96. Resiliency is provided by thin layers of rubber or cork 95 interposed between the co-operating surfaces of the plugs 92 and socket members 93. The latter are screwed into the vertical ring 2 and clamped by screws 97. Specification 497,584 is referred to.
Patent GB-1496605-A (GB)
Title: Automotive internal combustion engine
IPC: F02B15/00
Filed: 1975-09-02
Abstract: 1496605 Spark ignition IC engines NISSAN MOTOR CO Ltd 2 Sept 1975 [19 Sept 1974]  36065/75 Heading F1B In a multi-cylinder engine in which some of the cylinders are supplied with a weak fuel-air mixture while others of the cylinders are supplied with a rich fuel-air mixture, the power output from each of the weak mixture cylinders is adjusted to be the same, or to be as near the same as possible as the power output of the rich mixture cylinders by the following measures taken singly or in combination:- (1) The bottom dead centre volumes (i.e. swept volume plus clearance at TDC) of the cylinders are adjusted by enlarging the bores of the weak mixture cylinders or by increasing the stroke lengths of the pistons. (2) A higher compression ratio is provided for the weak mixture cylinders than for the rich mixture cylinders. (3) The ignition timing in the rich mixture cylinders is retarded as compared with the ignition timing in the weak mixture cylinders. The exhaust gases from both weak and rich mixture cylinders are combined and after-burnt in a thermal reactor.
Patent GB-737257-A (GB)
Title: Improvements in or relating to mechanical handling appliances
IPC: B66F9/18
Filed: 1953-12-29
Abstract: 737,257. Grab attachments for fork lift trucks. NAAMLOOZE VENNOOTSCHAP DE BATAAFSCHE PETROLEUM MAATSCHAPPIJ. Dec. 29, 1953 [Dec. 29, 1952], No. 36098/53. Addition to 725,941. Classes 78 (3) and 78 (4). The lift truck grab arms of the parent Specification are modified in that they each comprise a plurality of thin substantially vertical spring leaves which are free for relative longitudinal sliding movement when the arm is flexed by clamping engagement with the load. The arms 33, 34 are moved towards one another by a pair of rams 31, 32 mounted in the lifting carriage 30 which slidably supports guide bars 28a, 29a secured to the arms. Each arm consists of an inner lamination 35, which extends the full length of the arm, and two outer laminations 36, 37 which extend over part of the length of the arm and so produce extra flexibility at the end. Sliding contact between the laminations is obtained by clips 40, 41 (Figs. 6 and 9) arranged at the top and bottom of each arm, which clips are each secured to lamination 35 by a screw 44 and embrace laminations 36, 37. In a modification (Figs. 10, 11, not shown) this is effected by a bolt passing through longitudinal slots in the laminations. The arms and carriage 30 are faced with rubber or expanded metal sheet 50. Instead of bending inwardly the ends of the arms only, each arm can be inclined inwardly throughout its length as shown in Fig. 14 which illustrates a modification in which the laminations are retained in sliding contact by bending the end of the inner lamination 60 over the ends of the other laminations 61, 62 which extend the full length of the arm and taper throughout their length to provide extra flexibility at the free end of the arm. To facilitate handling a drum with its longitudinal axis arranged parallel with the arms the planes of the arms converge downwardly and longitudinal barrel hoop-engaging slots (not shown) are provided with bevelled edges on the inner faces of the arms. The Specification states the optimum dimensions of these slots for loads of a given size. Specification 737,256 is referred to.
Patent GB-500830-A (GB)
Title: A process for the simultaneous manufacture of calcium nitrate and carbon dioxide
IPC: C01B32/50
Filed: 1937-12-30
Abstract: 500,830. Apparatus for generating gases. MONTECATINI SOC. GENERALE PER L'INDUSTRIA, MINERARIA, ED AGRICOLA. Dec. 30, 1937, No. 36102. Convention date, Dec. 31, 1936. [Class 2 (i)] [Also in Group III] In apparatus for the production of calcium nitrate and carbon dioxide under pressure, limestone, broken into suitably sized pieces, falls onto grating 3 disposed in chamber 1 from hopper 2 constructed with a double closure, and nitric acid is sprayed thereonto through perforated pipe 10. Calcium nitrate solution flows into chamber 5, escaping therefrom through float-controlled valve 6. Carbon dioxide is withdrawn through outlet 7, and impurities, chiefly silica, through valve 8. The chambers 1, 5 are made of stainless steel.
Patent GB-1401323-A (GB)
Title: Multi-circuit protective valve assemblies
IPC: B60T11/32
Filed: 1972-08-03
Abstract: 1401323 Brake valves ROBERT BOSCH GmbH 3 Aug 1972 [4 Aug 1971] 36218/72 Headings F2F and F2V A multicircuit protective valve assembly for a vehicle brake system comprises a plurality of spill valves 7, 8, 9, 10 with a common inlet 1 connectible to an air compressor and separate outlets connected to air reservoirs or other pneumatic equipment, each valve having a closure member 18 having separate faces A, B of different effective areas acted on by air pressure, the member 18 being acted on in the opposite directions by a spring 20 the sp ing constant of which is such that at a pressure of 0-bar acting on area B the pressure acting on area A is 0À3 to 0À5 bar higher at a flow through quantity of 200 L/min than at a flow through quantity of 50 L/min. In the embodiment shown valves 9, 10 are connected by outlets 13, 14 respectively to a spring applied fluid pressure released braking system and to an arrangement for tipping the vehicle. The assembly ensures that if one circuit connected to an outlet fails, compressed air can still pass to the remaining circuits.
Patent GB-1160031-A (GB)
Title: Trifunctional Epoxy Crosslinking Agents
IPC: C08F8/00
Filed: 1967-08-07
Abstract: 1,160,031. Propellants. UNITED AIRCRAFT CORP. 7 Aug., 1967 [2 Sept., 1966], No. 36226/67. Heading C1D. [Also in Divisions C2 and C3] Moulded propellants for rocket motors comprise a particulate oxidiser dispersed through a binder comprising a carboxy-terminated polymer which is cured with a cross-linking agent of formula wherein R 1 , R 2 , R 3  and R 4  are each H or C 1-4  alkyl, and X which contains up to 11 C atoms has one of the formulµ wherein R 7  . . . R 13  are each H or C 1-5  alkyl, n is 1-5, a is 1-9, W and Y are each H or an aliphatic group, and Z is a branched-chain aliphatic group. Specified ingredients of the composition (bends the binder) are NH 4 ClO 4 , Al, chromium 2-ethylhexanoate and tris (2- methylaziridinyl) phosphine oxide.
Patent GB-418331-A (GB)
Title: Improvements in clutch operating mechanism for road rollers or other vehicles
IPC: F16D21/02
Filed: 1933-12-23
Abstract: 418,331. Reversing-gearing. FOWLER & CO. (LEEDS), Ltd., J., and OWEN, W. A., Steam Plough & Locomotive Works, Leeds. Dec. 23, 1933, No. 36268. [Class 80 (ii).] In reversing-gearing for road rollers or other vehicles, a pair of coaxial friction clutches 7, 8 giving forward and reverse drives respectively are controlled by pivoted levers 3, 4 pivotally connected at their free ends to sleeves 13 adjustably secured on a cross-rod 10. The bifurcated end of one arm 23 of a bell-crank lever, pivoted at 22, straddles a central collar 18 on the rod and engages sliding abutments 24 of adjustable springs 19. The other arm 23<a> of the bell-crank is connected by a link 23b to a pivoted hand lever 25 which is shiftable through a gate 26 having end notches for the forward and reverse positions and a central notch for the neutral position. In neutral position, both clutches are free. When the lever 25 is moved to one of its end positions, the rod 10 is caused to move axially in the appropriate direction through one of the springs 19, the abutment 24 of the other spring being held against the collar 18.
Patent GB-1273096-A (GB)
Title: Manipulator apparatus
IPC: B25J9/10
Filed: 1970-07-27
Abstract: 1,273,096. Electric correspondence control systems. WESTINGHOUSE ELECTRIC CORP. July 27, 1970 [Oct. 30, 1969], No.36283/70. Heading G1N. A manifpulator 10, Fig. 1 having a shoulder joint 28, an elbow joint 30 and wrist joint 32 for moving e.g. a brush 24, is remotely controlled by a lever 39 and signal processor 35 to move in a desired pattern. In the embodiment described, wherein the brush is moved over a plane surface, two mathematical relationships are developed between the angles made by sections 17, 19, 21 and the perpendicular from joint 28 on to the plane, one of these angles is controlled by lever 39 and the other two angles are determined by a computer network in processor 35. Angular position actuators and sensors are located at the joints, the latter feeding back signals to processor 35 to energize the actuators with the individual differences between the desired and actual angular position signals.
Patent GB-1469193-A (GB)
Title: Process and apparatus for the manufacture of basic iron iii sulphate
IPC: C01G49/14
Filed: 1975-09-03
Abstract: 1469193 Basic ferric sulphate HOECHST AG 3 Sept 1975 [28 Sept 1974] 36283/75 Heading C1A [Also in Division F4] Basic ferric sulphate, FeOHSO 4  is obtained by heating ferrous sulphate heptahydrate in the presence of an oxygen containing gas heated at a temperature in the range 46 to 480 C., not more than 25% by weight of the product being recycled to the reaction zone. Heating may be provided electrically and hot air may be passed over the heated reaction material to maintain the temperature at a maximum of 420 C. The heating is preferably carried out in an elongated reaction zone rotating on its longitudinal axis, the reaction zone being subdivided into a plurality of longitudinal compartments.
Patent GB-1181185-A (GB)
Title: Circuit for Stabilizing the Amplitude in a Directly Driven Mechanical Oscillatory System
IPC: H03B5/30
Filed: 1968-07-30
Abstract: 1,181,185. Transistor electro-mechanical oscillators. KIENZLE UHRENFABRIKEN G.m.b.H. 30 July, 1968 [22 Aug., 1967], No. 36291/68. Heading H3T. [Also in Division G3] An electro-mechanical oscillator of the type maintained in oscillation by a transistor 1 having a driving coil 4 connected to its collector and a pick-up coil 3 connected to its base, more particularly for a clock, has an amplitude stabilizing transistor 2 connected with its emitter-collector circuit in series with the driving coil and first transistor and its base-emitter circuit connected through a diode 6 to the driving coil. Excessive swing of the mechanical oscillator induces a sufficient voltage in the driving coil 4 (or part 4<SP>11</SP> thereof) to overcome the threshold of diode 6 and so increase the resistance of transistor 2. Increase of supply voltage also increases the resistance of transistor 2; 7 and 8 provide a starting bias and 9 suppresses high-frequency oscillations. The opposite conductivity type transistors may be used (Fig. 2, not shown).
Patent GB-931410-A (GB)
Title: Improved waveform generator
Inventor: BENDER FRIEDRICH
IPC: H04N/
Filed: 1959-10-27
Abstract: 931,410. Transistor saw-tooth wave generators. FERNSEH G.m.b.H. Oct. 27, 1959, No. 36377/59. Class 40 (6). A low impedance saw-tooth generator feeding a load 21 through a cable 20 comprises a resistor connected to the cable and in series with an inductor 17 coupled to a source of rectangular voltage. In the circuit shown the rectangular voltage is produced by rendering the transistor conducting to produce the sweep portion of the saw-tooth wave, and non- conducting to produce the flyback. The flyback current flowing into the stray capacitance 15 and circuit 18, 22 produces the rectangular portion of the saw-tooth wave necessary to provide a saw-tooth current in deflection coils 23.
Patent GB-841388-A (GB)
Title: New polymerisation method and new polymers produced thereby
Inventor: SMALL PERCY ARTHUR
IPC: C08F20/14
Filed: 1957-11-22
Abstract: Crystalline polymethyl methacrylate having a molecular weight greater than 40,000, which exhibits no infra-red abosrption band at 955 cm,-1 and which exhibits and X-ray diffraction pattern, may be prepared by a process which comprises polymerising methyl methacrylate by bringing it into contact with a compound of formula MgR1R2 where R1 and R2 may be alkyl, cycloalkyl, aryl or aralkyl radicals.  The crystallinity of the products may be increased, or recovered after the polymers have been melted, by treating with a liquid which swells the polymer, e.g. diethyl ether, methanol or xylene.  The magnesium compound may be magnesium diisopropyl, magnesium diethyl, magnesium di-t-butyl or magnesium diphenyl, and solvents, e.g. petroleum ether, diethyl ether and dioxane, may be present.  The products may be purified by washing and macerating with methanol, with or without hydrochloric acid.  They may be incorporated in mixtures comprising butadiene-acrylonitrile copolymers, zinc oxide, sulphur, benzothiazolyl disulphide and stearic acid, and the compositions vulcanised.  Specification 837,227 is referred to.ALSO:Magnesium dialkyls may be prepared by adding dioxane to solutions of Grignard reagents in dry ether.  In examples: (1) isopropyl iodide is reacted with magnesium in dry ether, dioxane added and the magnesium iodide complex removed from the solution of magnesium diisopropyl; and (6) dioxane is added to a solution of ethyl magnesium bromide in ether, and the solution of magnesium diethyl decanted from the magnesium bromide complex. Specification 837,227 is referred to.
Patent GB-1313561-A (GB)
Title: Typewriters
IPC: B41J25/12
Filed: 1970-07-28
Abstract: 1313561 Typewriters BROTHER KOGYO KK 28 July 1970 [4 Aug 1969] 36468/70 Heading B6F Letter spacing escapement mechanism in a typewriter includes a repeat-spacing key 55 whereby the platen carriage is repeatedly stepped while the key is depressed. The key 55 is linked to a bell-crank lever 46 and when depressed pivots the lever 46 clockwise to urge a nose 18c of a feed pawl 18 into engagement with an escapement wheel 16 through a spring 48 acting against a spring 21. The pivotal movement of the pawl 18 disengages a keep pawl 19 from the wheel 16 by engagement of a stop 18f on the pawl 18 with an arm 19c of the pawl 19. The escapement wheel 16 is thus permitted to rotate half a tooth increment under urging by a spring drum 33 until a successive tooth of the wheel 16 strikes the nose 18c. The impact urges the nose 18c out of engagement with the tooth, the pawl 19 being brought back into engagement by a connecting spring 23. The spring 48 then urges the pawl 18 back into engagement with the wheel 16 for a repeat spacing cycle. In normal operation, a space bar 45 or character key (not shown) acts through a lever 38 or 37 respectively to rock an actuator 24 having a roller 26 engaging an arm 18d of the pawl 18 to urge the pawl nose 18c into engagement with the wheel 16, impact disengagement of the nose 18c being prevented by the actuator 24 resisting clockwise pivotal movement of the pawl 18. The tension of the spring 48 may be adjustable.