baber/WOPTO huggingface dataset:
Patent GB-522818-A (GB)
Title: Improvements in or relating to olefine polymerisation
IPC: C07C11/02
Filed: 1938-12-17
Abstract: 522,818. Polymerizing olefines. USINES DE MELLE. Dec. 17, 1938, Nos. 36835 and 36836. Convention dates, Dec. 23, 1937 and May 9, 1938. [Class 2 (iii)] Gaseous olefines are converted into dimers and only small amounts of higher polymers by treating with hot aqueous polymerizing agent of at least 50 per cent. strength and removing the polymers from the polymerizing agent by azeotropic distillation substantially as soon as they are formed. Industrial mixtures of olefines with other gases may be passed through a battery of elements containing cold inert polymerizing agent to absorb the olefines, the solution then being passed to the polymerizing vessel; the gases not dissolved are preferably drawn off before reaching the polymerizing vessel, and they and/or excess olefines may be passed through similar polymerizing apparatus, maybe containing a stronger polymerizing agent or operated at a higher temperature and/or pressure. The polymerization may be effected at other than atmospheric pressure, but the distillation is preferably at atmospheric or reduced pressure and assisted by injection of inert gas, the olefines, or superheated or other steam. The process is especially applicable to the production of di-isobutene to be hydrogenated to iso-octane for motor fuel; it may be used to separate an olefine from another by selective absorption. Using the apparatus shown, isobutylene is forced by a blower v through a pipe t into a vessel A containing 50 per cent. sulphuric acid at 95‹C.; the polymers with aqueous and alcoholic vapours pass through a trap B for entrained liquid to a condenser C and a separator E, any gases separating in a vessel D being passed back by a pipe a to the blower V or to a blow-off pipe t<SP>1</SP>; from the separator the aqueous (lower) layer is returned to the vessel A ; the polymer (upper) layer is passed to a distillation column F, from which alcohol is evaporated to a condenser K and returned to vessel A and the polymers pass to a rectifying column H; the dimer is removed at I and the higher polymers from the base of the column. In a modified apparatus operated under pressure, e.g., 7-8 kg. per cm. the liquid overflows from the polymerization vessel to a separator for gases and through a reducing valve to a column still operating at atmospheric pressure. Specifications 474,831 and 487,166 are referred to.
Patent GB-883371-A (GB)
Title: Apparatus for dispensing granular material
IPC: A01K39/01
Filed: 1959-10-30
Abstract: 883,371. Powder &c. distributers. WESTMACOTT, I. B. Aug. 30, 1960 [Oct. 30, 1959], No. 36862/59. Class 18. An apparatus for dis pensing granular materia such as chicken corn corn prises a container 1, a har ness 9 by which the con tainer may be carried on the operator's back, a dis charge tube 4 connected to an outlet in the base of the container by a flexible con nection 3, and a closure 5 a the outlet end of the tube 4 adapted to be opened and closed by means of a cable 6 and a lever 7 spaced fron the closure so as to b readily accessible. The base 2 of the container slopes down to the outlet and the carrying harness 9 is attached to the container 1 by means of webbing straps 8. The joint between the tubes 3 and 4 may be such as to allow adjustment of the effective length of the tube.
Patent GB-1490102-A (GB)
Title: Artificial and natural structures
IPC: E01D22/00
Filed: 1975-09-08
Abstract: 1490102 Repairing structures BALFOUR BEATTY Ltd 8 Sept 1975 [7 June 1974] 36897/75 Divided out of 1490101 Addition to 1399510 Heading E1S [Also in Division D1] A structure, e.g. a building or bridge having cracks or pores therein is repaired by the introduction of a hardenable material in a liquid or semi-liquid state, the method comprising applying over the surface of the structure a flexible porous reinforcing sheet 7, e.g. a glass fibre mat, applying over the sheet 7 a fluid-impermeable covering 8 (preferably of the form described in Parent Specification), sealing the boundary edges of the covering to the structure to form a fluid-tight enclosure, evacuating air from the cracks 6 or pores adjacent the covering and from the voids in the sheet 7, and admitting the hardenable material into the evacuated cracks or pores and into the voids in the sheet 7. Preferably, the covering 8 is spaced from the sheet 7, e.g. by projections on the sheet 7 or other spacers, and the hardenable material is allowed to fill this space, so that a surface layer of material is formed around the sheet 7. If the covering is not so spaced, a further layer of material can be applied to the sheet 7 afterwards.
Patent GB-321584-A (GB)
Title: Improvements in or relating to automatic ventilators for closed carriages and the like
IPC: F23L17/02
Filed: 1928-12-14
Abstract: 321,584. Ford, E. L., and Rew, R. J., (trading as Airvac Ventilators). Dec. 14, 1928. Addition to 228,602. Ventilators. - The exterior deflectors 1, 1<*> of the ventilator claimed in the parent Specification are each provided with an aperture 2. The sides of the apertures are arranged in substantially parallel relation to the sides of the deflectors, and from the inner edge of each aperture an auxiliary deflector 4, 4* is arranged to project outwardly and towards the centre of length of the ventilator.
Patent GB-1441496-A (GB)
Title: Process of manufacture of polyhydric alcohol bromohydrins
IPC: C07C31/42
Filed: 1974-08-22
Abstract: 1441496 Polyhydric alcohol bromohydrins NOBEL HOECHST CHIMIE 22 Aug 1974 [23 Aug 1973] 36966/74 Heading C2C Bromohydrins or hydrobromide salts of bromohydrins of polyhydric alcohols which may also contain an amino group are prepared by reacting an aqueous solution of HBr with the polyhydric alcohol or amino-alcohol in an acetic acid medium, eliminating the water during the course of the reaction by distilling off a wateracetic acid mixture rich in water by means of an apparatus comprising a distillation column enabling the vapours to be extracted at a temperature lower than 103‹ C., collecting the resultant acetylated product and subjecting it to a transesterification reaction with a monohydric alcohol such as methanol.
Patent GB-1235884-A (GB)
Title: Measuring the resistivity of semiconductors
Inventor: SAVIN ANATOLY IVANOVICH
IPC: G01N27/02
Filed: 1968-08-02
Abstract: 1,235,884. Measuring resistivity. A .I. SAVIN, A.I. GOLUBEV and V.M. LOMAKINA. Aug.2, 1968, No.36985/68. Heading G1U. The resistivity of a chip 20 of semi-conductor material is determined by bringing the chip into a gap 2 in a toroidal coil 1 which forms part of the tuned circuit of an oscillator, and measuring the resultant decrease in the Q-factor of the tuned circuit. The change in Q-factor causes the magnitude of the oscillations to decrease, and in the embodiment described this results in a corresponding change in the resistance on a non-linear element 4 coupled to the tuned circuit. Element 4 forms one arm of a bridge 4, 5, 6, 7, so that the change in Q-factor unbalances the bridge, causing an unbalance current to flow in detector 8. The unbalance current may be measured on an instrument calibrated to read the resistivity of the chip directly. For automatic sequential measurements, detector 8 is constituted by a D.C./A.C. converter whose output is passed through an amplifierlimiter 9 to a threshold detector 13. When the bridge becomes unbalanced detector 13 produces an output which triggers a ramp waveform generator 14 Fig.4 (not shown) and switches on a pulse generator 16. The ramp waveform is fed back to the tuned circuit in such a sense as to tend to rebalance the bridge, and when this occurs the output from amplitude detector 13 ceases, switching off pulse generator 16. The number of pulses that have been generated is indicated on counter 17 and is dependant on the initial unbalance of the bridge, which in turn is a function of the chip resistivity. Counter 17 may control an actuator 19 which directs the chip into one bin or another according to its resistivity. After each measurement the detector 13 is disabled by unit 21, while the amplifier 9 is connected to an automatic balancing unit 12 which, by controlling non-linear bridge resistor 5, keeps the bridge balanced until the next measurement. To check automatically and at regular intervals the operation of the apparatus, after a certain number of measurements the bridge is unbalanced by a controlled pulse from control unit 18. The resultant count recorded by counter 17 is then compared with limit values defining the permissible accuracy range.
Patent GB-302906-A (GB)
Title: Safety device for use in machine guns
IPC: F41A17/66
Filed: 1928-12-14
Abstract: 302,906. Soc. Italiana E. Breda. Dec. 22, 1927, [Convention date]. Machine guns.- A safety catch for preventing the forward movement of the firing pin 3 until the breech-block 8 has fully closed the breech, comprises a pair of teeth 1, 2 on the firing pin and another pair of teeth 4, 5 on a plunger 6, which, when the breech is open, is pressed in by a spring 7 to lock the firing, pin, but which, when the breech is closed, is lifted by the wedging action of inclined planes 9 on the breech-block against an inclined plane 10 on the plunger, the firing pin being thereby released. The engagement of either tooth of one pair with either tooth of the other pair will lock the firing pin. The provision of these two pairs of teeth therefore ensures the locking of the firing pin even when the inward movement of the plunger is delayed or the locking engagement is temporarily undone by accident.
Patent GB-1316054-A (GB)
Title: Process for the production of isothymol
IPC: C07C37/14
Filed: 1971-08-09
Abstract: 1316054 Isothymol UNION RHEINISCHE BRAUNKOHLEN KRAFTSTOFF AG 9 Aug 1971 [10 Aug 1970] 37284/71 Heading C2C Isothymol is prepared by alkylating m-cresol with propylene in the presence of an aqueous catalyst solution which contains zinc bromide or chloride and which is activated by the addition of a small quantity of hydrogen bromide or chloride, at a temperature of up to 140‹ C., followed by isomerization at a temperature of 140‹ to 200‹ C., the constituents of the reaction mixture which boil below the isomerization temperature being separated off by distillation either before or during isomerization. In one embodiment the mixture of m-cresol and catalyst solution is initially heated to a predetermined isomerization temperature to drive off materials boiling below the isomerization temperature, the resulting mixture is cooled to a predetermined alkylation temperature, propylene is added and the resulting mixture is alkylated and isomerized.
Patent GB-998087-A (GB)
Title: Yarn tension control device
Inventor: BARLOW GEORGE EDWARD
IPC: B65H54/54
Filed: 1960-10-31
Abstract: 998,087. Tension control device. IMPERIAL CHEMICAL INDUSTRIES Ltd. Oct. 20,1961 [Oct. 31, 1960], No. 37300/60. Heading D1D. A tension control device about which a yarn e.g. an elastic bulked yarn, panes from a constant speed delivery source to a wind up station comprises a rotary member such as a roller, capstan or, as shown, a grooved wheel 20 engaging the yarn, a pair of opposing ball or roller bearings 21, 22 of angular contact, deep-groove, or, as shown, thrust type for supporting the rotary member and means for applying an adjustable load between the balls or rollers and their bearing surfaces whereby the torque required to turn the rotary member 20 is adjustable. As shown the wheel 20 is mounted on a shaft 23 with the thrust bearings 21, 22 on either side. A fixed flange 23a on the shaft locates bearing 21 while a sleeve 24 threaded on shaft 23 may be screwed up to compress spring washers 25, 26, 27 and urge a sleeve against the race 22b of bearing 22. The sleeve 24 which is held in its adjusted position by lock nuts 28, 29 may be calibrated and a fixed pointer associated therewith so that a reading of the load on the bearings may be taken. In an alternative form in which a pair of angular contact bearings are used, a cylindrical extension is arranged on the rotary member to extend inside the sleeve 4 and thus act as a dust seal. A soft rubber band may be arranged in the yarn engaging groove of the rotary member. Groups are given of bearing torque against axial bearing load for different types of bearing running at different speeds. Specification 998,088 is referred to.
Patent GB-1218913-A (GB)
Title: A pigment concentrate for the production of plastics foils with the properties of paper, and the production of plastics foils with the use of such concentrate
Inventor: HUTT THOMAS GOUGH
IPC: C08J3/22
Filed: 1969-07-25
Abstract: 1,218,913. Polyethylene compositions. REIFENHAUSER K.G. 25 July, 1969 [29 July, 1968], No. 37505/69. Heading C3P. Plastics foils with the properties of paper are coloured with a pigment concentrate consisting of a mixture of 50-75% by wt. inorganic and/or organic pigment and 50-25% by wt. of wax. The concentrate is usually added in an amount 5-20% by wt. to the plastics material; a high pressure polyethylene with a low melt index may also be added to constitute up to 50% by wt. of the resultant mixture. The pigment is preferably TiO 2 , alone or with other pigments, e.g. zinc or cadmium sulphide, phthalocyanine, ultramarine blue or lampblack. Paraffin waxes having 33 + carbon atoms are preferred. Specified plastics are polystyrene, polyvinyl chloride, polytrifluorchlorethylene, polyethylene glycol terephthalate, polypropylene and polyethylene. In the example, a mixture of paraffin wax and titania is added to granulated low-pressure polyethylene and the mixture is extruded to form a foil.
Patent GB-322656-A (GB)
Title: Improvements in shaft couplings
IPC: F16D1/12
Filed: 1928-12-19
Abstract: 322,656. Ellis, G. O. Dec. 19, 1928. Shaft couplings.-In a coupling allowing infinite variable angular adjustment of two shafts a, b by a worm-wheel c, keyed to the shaft a and rotated by a worm g journaled in a casing d, and in which a flexible disc k is interposed between the casing d and a disc l secured to the shaft b, the faces of the parts d, l are provided with dog teeth which mutually overlap and place the disc in compression during the drive. To facilitate reassembly in a definite angular relationship, a tooth m<1> of each set is larger than the other teeth and large teeth m<1> are arranged diametrically opposite to preserve balance. Accidental rotation is prevented by a spring-pressed ball i engaging the worm g in axial grooves j so arranged that their angular distance corresponds to a rotation of the worm by one degree. The worm g is retained in the casing by a forked key h engaging a slot in the casing and a circumferential groove in the worm stem.
Patent GB-1198698-A (GB)
Title: Improvements in and relating to a Method of and a Tool for Removing a Bush from its Housing.
Inventor: QUICK THOMAS JOHN
IPC: B25B27/06
Filed: 1967-08-16
Abstract: 1,198,698. Bush extractors. R. W. CALVERT. 15 Nov., 1968 [16 Aug., 1967], No. 37569/67. Heading B4C. A tool for extracting a bush from a tubular housing comprises a tubular element 1 provided with a screw thread 7, which is adapted to cut into the inner surface of the bush, and with an internally screw threaded metal plug 5, and a screw threaded bolt 2. In use the element 1 is screwed into enagement with the bush by a bar inserted through a pair of apertures 9. The bolt 2 is then screwed into the element until the end portion 4 engages a rigid support. The element then moves axially of the bolt and the bush is removed.
Patent GB-1490028-A (GB)
Title: Apparatus for the surface treatment of workpieces
IPC: B05B13/02
Filed: 1975-09-15
Abstract: 1490028 Apparatus for spray cleaning metals OTTO DURR KG 15 Sept 1975 [16 Sept 1974]  37762/75 Heading C7E [Also in Division B8] Metal workpieces W to be treated by washing jets and thereafter drying jets, are conveyed to a station I of a rotary conveyer K<SP>1</SP> by the beams 11 of a walking beam conveyer. The conveyer K<SP>1</SP> carries each workpiece around a vertical axis X through stations I to V, at each of which it is rotated around a horizontal axis Y while being treated by spray jets as part of a washing operation. Washing vapour is removed by a suction device 17. When the workpiece arrives back at station I, it is picked up by the walking beam conveyer and is then conveyed to the station I of a conveyer K2. The latter is similar to the conveyer K 1  but carries the workpieces through drying stations I to V. A blower is provided at 18 in a casing (not shown) of the conveyer K 2 . Each conveyer K 1 , K 2  comprises a rotor 21 mounted on a bearing 20 to rotate about the axis X. Five angularly spaced (in the horizontal direction) bearings 22 are each mounted on the rotor 21, and carry a U-shaped frame 23 which is rotatable about the axis Y by the action of a pinion 27 and ring gear 28. A clamping bar 32 is urged by springs 33 to hold the workpiece W against portions 31, 31, of the holding frame 23. The bar 32 can be released by the action of cranks 37, 37. A stop 40 can be projected into an aperture 39 to hold the frame 23 from rotation. The ring gear 28 may either be rigid with the fixed frame of the conveyer K 1  (or K 2 ) or may itself be rotatable.
Patent GB-1118636-A (GB)
Title: Improvements in or relating to presses for forging or stamping
IPC: B21J9/12
Filed: 1965-09-06
Abstract: 1,118,636. Forging and stamping presses H. BECHE. 6 Sept., 1965 [26 Jan., 1965], No. 37935/65. Addition to 1,059,127. Heading B3H. In a drop forging or stamping press according to Specification 1,059,127, the tup cylinder chamber 3 is connected to a pair of cylinders 4 containing pistons 5 subjected to an upward force. Pistons 5 are connected by rods 6 to slides 7 linked at 11 to pistons 10 in hydraulic cylinders 9 connected to gas-loaded hydraulic accumulators 12. The two accumulators are interconnected on both their gas and liquid sides.
Patent GB-1351553-A (GB)
Title: Isomerization of cycloalkanebis-methylamines
IPC: C07C211/18
Filed: 1972-08-15
Abstract: 1351553 Isomerization of cycloalkane-bis- (methylamines) MONSANTO CO 15 Aug 1972 [16 Aug 1971] 38035/72 Heading C2C A mixture of the cis and trans isomers of a cycloalkane-bis-(methylamine) having a C 4  to C 12  cycloalkane ring wherein the ratio of one isomer to the other in the mixture is substantially lower than the equilibrium ratio at said temperature, is isomerized at 175 to 290 C., by contacting said mixture at said temperature with H 2  having a partial pressure between 10 and 5000 p.s.i.a. in the presence of a hydrogenation catalyst and at least 0À01 lb of NH 3  per lb of the mixture for a time sufficient to substantially alter the cis : trans isomer ratio in the mixture, and selectively separating the said one isomer from the contacted mixture leaving a residual mixture wherein the ratio of the said one isomer to the other isomer is substantially lower than the said equilibrium ratio, the residual mixture being recycled for more contacting. By repeating this process the other isomer can be converted to the desired isomer in a very high proportion.
Patent GB-1468842-A (GB)
Title: Pattern device for use in the manufacture of foundry moulds
IPC: B22C23/00
Filed: 1974-08-30
Abstract: 1468842 Foundry moulding E BUHRER 30 Aug 1974 [5 Sept 1973] 38111/74 Heading B3G A pattern device for the production of the upper part of a foundry mould comprises a mould pattern 1, an upper pattern 9 shaped to form a trough including a basin, two gate pins 3 with guide holes 4 and shaped to form two gates extending from the trough, with the trough connecting the basin with the gates, and two guide pins fixed to the mould pattern which extend into the guide holes 4 to support the pattern 9 during the production of the upper mould part. One of the guide pins 2 may be as shown in Fig. 1 and the other 25 as in Fig. 2. Each gate pin 3 includes a bushing 6 axially slidable thereon against a spring 7; the pattern 9 is secured to each bushing by a threaded cover 11. When moulding sand is compressed by a press, not shown, which acts downwardly on the pattern 9 the bushings are forced downwardly axially of the pins 3. Additional gate pins without guide holes and pins may be located between the two gate pins described.
Patent GB-1009723-A (GB)
Title: Improvements in or relating to portable building roof structures
IPC: E04B7/08
Filed: 1961-10-25
Abstract: 1,009,723. Portable building roofs. S. WOODING. Jan. 24, 1963 [Oct. 25, 1961; Sept. 25, 1962], Nos. 38134/61 and 36341/62. Heading E1A. A roof for a portable building comprises a plurality of arcuate roof span elements 10, incorporating a roof skin and secured in end-toend abutting relationship to form a roof supported only at its ends. The span element may be held in abutment by ground secured straps 27 in the form of semi-circular ridge covers engaging ridges at the lateral edges of adjacent span elements to secure the elements in lateral as well as longitudinal relationship. Adjacent elements may be dowel located. Straining wires 29 anchored to the foundations may have quick release strainers 43. Ventilation channels may be provided over the footing wall 40. The elements have inner and outer skins separated by a lattice construction and sealed by plastic strips. In another embodiment the laterally and longitudinally adjacent elements are held together, with the imposition of resilient sealing members, by toggle fasteners or by straining bolts bearing on chocks fixed to the elements.
Patent GB-1061455-A (GB)
Title: Lightweight building material
IPC: C04B28/20
Filed: 1965-09-07
Abstract: Porous lightweight building materials are made from a mixture of finely divided white lime obtained by burning pure CaCO3 and having a weight per litre of 1.03-1.15 kg., sand, water and an expanding agent, e.g. aluminium powder, by casting the mixture into a mould, causing or allowing it to set therein and then steam hardening the rigid porous structure so formed.
Patent GB-1013221-A (GB)
Title: Improvements in veterinary concentrates comprising nitroimidazoles
Inventor: PARNELL EDGAR WILLIAM
IPC: A61K33/04
Filed: 1961-10-25
Abstract: Solid concentrates for addition to drinking water for use in the treatment on prevention of histomoniasis comprise an admixture of a nitroimidazole of the general formula:  <FORM:1013221/A5-A6/1> wherein one of X and Y represents a nitro group and the other a hydrogen atom and R1 and R2 are the same or different and each represents a hydrogen atom or an alkyl group, the sum of the carbon atoms in R1 and R2 not exceeding four, together with a solid, water-soluble pharmacologically acceptable acid salt, or, a solid, water-soluble inorganic acid addition salt of a nitroimidazole of the above general formula together with a solid, pharmacologically acceptable base which is preferably a nitroimidazole base of the general formula but may be any non-toxic base e.g. rodium or potassium carbonate.  Suitable acid salts are those derived from polybasic acids e.g. potassium dihydrogenphosphate.  The relative amounts of the specified ingredients may be such that, when the composition (which may also comprise a neutral carrier) is dissolved in water, the pH of the aqueous composition is within the range 4.5-7.5.