baber/WOPTO huggingface dataset:
Patent GB-430734-A (GB)
Title: Improved apparatus for the manufacture of pipes and or the lining thereof with cementitious material
IPC: B28B21/26
Filed: 1933-09-19
Abstract: 430,734. Moulding pipes. BISHOP, E. H., 13, Kenilworth Street, Waverloy, near Sydney, Australia. Sept. 19, 1933, No. 25857. Void [Abridged as open to inspection under Sect. 91 of the Acts, March 21, 1934]. [Class 87 (ii)] In pipe-making apparatus a rotatable forming core traversing from end to end of the mould is used in conjunction with a helical feeding screw terminating adjacent to the former and an arcuate sectioned mould having end plates to retain the material during moulding. Fig. 1 shows one construction in which material supplied to the hopper 6 is fed by the worm 11 through the tube 7 and delivered adjacent to the forming core 12 which is fixed on the worm shaft. The mpuld 19 is formed in three arcuate sections, and is mounted on track wheels 16 so that when the pressure of the packed material reaches a predetermined limit, it moves longitudinally over the former 12 against the action of the counterweight 23. Sliding doors 40, Figs. 1 and 4, on the end of the mould are operated by the hand lever 42 to fit tightly over the former 12 at the end of the moulding operation. The mould and pipe are run out of the machine on rollers 53 which are eccentrically mounted so that they can be raised into mouldcontacting position by worm gear 61 operated by a common hand wheel 62. The tube 7 is used as the guide for the reinforcement where such is used. The cable from the counterweight 23 is fed to a winch drum on the mould carriage which can be rotated by a hand wheel for adjusting purposes and is fitted with ratchet retaining-gear. In a modified construction, the hopper 6 and tube 7 are vibrated longitudinally by a connecting rod 68, Fig. 7, from a crank shaft 67, the shaft 8 being made a sliding fit in the hopper wall 66. A construction in which the mould is vertical instead of horizontal, also is described..
Patent GB-1385561-A (GB)
Title: Method for producing monomethyl terepthalate
IPC: C07C67/08
Filed: 1972-06-02
Abstract: 1385561 Preparation of monomethyl terephthalate DYNAMIT NOBEL AG 2 June 1972 [4 June 1971] 25878/72 Heading C2C The invention comprises a method of preparing monomethyl-terephthalate which comprises (a) oxidizing p-xylene in the presence of a polyvalent heavy metal catalyst at 90-140‹ C. and a pressure of 1-15 atmospheres and under an oxygen partial pressure of <3 atmos., stopping the oxidation when a maximum achievable selectivity for p-toluio acid is reached; (b) esterifying the resulting acid to methyl-p-toluate; (c) oxidizing the methyl-p-toluate to monomethyl terephthalate in the presence of a heavy metal polyvalent catalyst at 130-200‹ C. and 1-6 atmospheres, stopping the oxidation when maximum achievable selectivity for monomethyl terephthalate is reached; (d) purifying the resulting monomethyl terephthalate. The preferred polyvalent catalyst is a polyvalent cobalt salt.
Patent GB-994748-A (GB)
Title: Process for the manufacture of new oxido-steroids
IPC: C07J5/00
Filed: 1961-07-17
Abstract: 6b ,19-oxido-steroids are prepared by oxidation of 19-unsubstituted 6b -hydroxy-steroids with a lead tetraacylate. The steroids may be of the androstane, pregnane, cholane, cholestane, stigmastane, spirostane or cardanolide series and may contain, as ring or 17-side chain substituents, free, ketalized or enolized oxo groups, esterified or etherified hydroxyl groups, alkyl groups, free or lactonized carboxyl groups or halogen atoms, and double bonds or oxido groups, for example in the 4,5- or 9,11- or 16,17-positions. Particularly they may contain a D 4-3-oxo grouping or in positions 3 and S substituents that enable such a grouping to be formed, such as protected 3a ,Sa -dihydroxy compounds e.g. cyclic carbonates, sulphites, acetonides or benzal compounds, or esterified or etherified D 4-3-hydroxy compounds, or esters or ethers of 3-hydroxy-Sa -halogeno-steroids or ketals or 3-oxo-5a -halogeno-steroids.  The process is advantageously performed in a solvent and in the presence of a weak base, such as calcium carbonate.  The products may be oxidized with a strong oxidant to give lactones of 6b  - hydroxy - steroid - 19 - acids; in the products aryloxy groups may be hydrolysed and the resulting hydroxy compounds oxidized to ketones, a D 4-double bond may be introduced by bromination and dehydro bromination or by dehydrohalogenation of the 5a -halo compounds; 17-oxo groups in the products may be reacted with hydrocarbon metal derivatives to give 17b -hydroxy - 17a  - alkyl -, alkenyl - or - alkynyl-androstane compounds, or they may be reduced to 17-ols with or without concomitant reduction or 3-oxo groups to 3-ols; 17a - and/or 21-hydroxy groups may be introduced into 20-oxo-pregnanes; and spirostane products may be degraded via pseudo-sapogenins to D 16-20-keto-pregnenes. Detailed examples are given. Specifications 994,747 and 994,749 are referred to.
Patent GB-283996-A (GB)
Title: Improvements in weighing apparatus
IPC: G01G21/00
Filed: 1926-10-18
Abstract: 283,996. Wollaston, H. J. Buchanan-. Oct. 18, 1926. Addition to 234,985 and 257,698. Pendulum-weight apparatus; bearings.-The balance described in the parent Specification is provided with bearings of hard material mounted in or on the upper parts of the supporting frame. The bearings comprise cylindrical rods C of polished steel or agate disposed in horizontal grooves B in the supporting members or in the interspace between two parallel rods or tubes. The bearings are held in place by clamps D and may be rotated to provide new bearing surfaces. The roller R of the balance may be provided with annular grooves to engage the bearing rods.
Patent GB-910890-A (GB)
Title: Improvements in or relating to drive means for driving a rotatable member at substantially constant speed
IPC: H02P7/06
Filed: 1959-07-28
Abstract: 910,890. Gramophone &c. cabinets, supporting. CHABOCHE, C. July 28, 1959, No. 25925/59. Class 40 (2). [Also in Group XXXV] A resilient mounting enabling a recordplayer, tape-recorder &c. to be used in a vehicle, comprises pairs of arms 17 projecting from a rigid frame 16 and between which are stretched rubber bands 18. Rubber air-cushions 19, 20, upon which the gramophone &c. is placed are secured by adhesive to the bands. The frame itself stands on rubber feet 22. The driving motor may have speed-governing means (see Group XXXV].
Patent GB-1384604-A (GB)
Title: Reel control for a tape transport system
IPC: G11B15/58
Filed: 1972-06-02
Abstract: 1384604 Tape transport MOHAWK DATA SCIENCES CORP 2 June 1972 [22 July 1971] 25993/72 Heading G5R [Also in Division G3] In a buffer chamber tape transport system, a supply reel R 2  is controlled such that it continuously pays out tape/intermittently pays out tape/coasts/continuously takes up tape, when the associated loop extends into the respective regions 1, 2, 3, 4 of a chamber L 2 , whilst a take up reel R 1  continuously pays out tape/coasts/ intermittently takes up tape/continuously takes up tape, for corresponding loop positions in a chamber L 1 . Logic circuitry (detailed in Fig. 2, not shown) is activated by signals from photocells S 1 -S 6  positioned in the chambers L 1 , L 2  to produce command signals T 1 , T 2  and P 1 , P 2  to cause the reel drive motors M 1 , M 2  to produce take up/payout of tape, as required, each motor being arranged in a circuit as in Fig. 3 (not shown), wherein a feedback voltage is obtained (at 8) to ensure that the motor speed is limited.
Patent GB-1433935-A (GB)
Title: Welding device for a sheet-welding appliance
IPC: B29C53/00
Filed: 1973-06-01
Abstract: 1433935 Seaming non-metallic sheet material ROBERT BOSCH HAUSGERATE GmbH 1 June 1973 [2 June 1972] 26204/73 Heading B5K [Also in Division H5] A unit 13 for welding plastics sheets comprises a sheet-supporting rail 14, a wire-type heating element 15, a switch 16 for the element 15 and a regulator 17 for regulating the temperature of the element 15, all such component parts being combined to form an integral unit which is adapted to be detachably fixed within an opening 11 in a housing 10. As shown, the unit 13 is attached to a plastics holder 12 detachably fixed to the housing 10 by a screw 18. The element 15, which is covered by a polytetrafluoroethylene sheet, is attached at one end to the regulator 17 and at the other end by a rivet 19 to a contact 20 of the switch 16. The contact 20 has a stem 21 which extends through a partition 22 on the holder 12 into the switch 16. A helical spring 23 extends around the stem 21 and acts between the partition 22 and the contact 20 to tension the element 15. The spring 23 is connected to the switch 16 by an electrically insulated wire 24. An adjusting member 27 of the regulator 17 is connected to the element 15 and is displaceable longitudinally of this element by rotation of a set screw 29 by a knob 36 having indicating marks 35 thereon. The screw 29 is in electrical contact with the member 27 and has a projection 31 which engages a contact sheet 33 connected by a wire 34 to the switch 16. By rotation of the knob 36, the stem 21 is moved into or out of the switch 16 to alter the switching point thereof. In operation, the sheets are pressed against the element 15 by lowering a hinged presser bar 37 which depresses a push-button 38 to close the primary circuit of a transformer (not shown). The element 15, which lies in the secondary circuit, is heated to effect welding. Expansion of the element 15, which is under constant tension, causes the stem 21 to be moved by the spring 23 towards the partition 22. After a predetermined expansion corresponding to a desired temperature as set by the knob 36, a contact (not shown) of the switch 16 opens to interrupt the primary circuit. When the element 15 has cooled, the switch 16 is closed again and, due to the continuing depression of the button 38, the element 15 is re-heated.
Patent GB-481912-A (GB)
Title: Improvements relating to tools for cutting circular holes in metal
IPC: B23K7/10
Filed: 1936-09-28
Abstract: 481,912. Perforating by fusion. CHILLCOTTS, Ltd., and STEWARD, W. A. B. Sept. 28, 1936, No. 26253. [Class 83 (iv)] A device for cutting circular holes in metal consists of a graduated radius bar slidably mounted and clamped in a cross-head supported rigidly in a bearing detachably secured to the work, one end of the bar being formed or provided with a ring to receive the cutter tip of a blowpipe. A graduated radius bar a provided with a ring b to hold the tip c of a blowpipe is adjustable in a cross-head d, which is adjustably secured to a spindle e supported in a bearing f. The bearing has a threaded extension passing through, the work k which it clamps on a centre g secured to the member h of the bed. The bed is provided with longitudinally adjustable work supporting crossmembers j.
Patent GB-1423266-A (GB)
Title: 2-substituted thio-s-triazolo-1,5-a pyrimidines
IPC: C07D249/14
Filed: 1973-06-01
Abstract: 1423266 Thio-substituted triazolo-pyrimidines ICN PHARMACEUTICALS Inc 1 June 1973 [7 June 1972] 26279/73 Heading C2C Novel compounds (I) where R is optionally substituted alkyl, aryl or aralkyl, R 1  is Me, halogen, mercapto or an amine group (including hydrazino and saturated N-containing heterocyclic groups) optionally in salt form, R 2  is H or ethoxycarbonyl and R 3  is H or Me provided that when R 2  is ethoxycarbonyl, R 3  is H, are made by reacting (II) with acetylacetone, diethyl ethoxymethylenemalonate or ethyl acetoacetate and, if necessary, alkylating a compound obtained or reacting it with POCl 3  followed optionally with an amine, N 2 H 4 , a substituted hydrazine or NaHS. Pharmaceutical preparations capable of inhibiting the action of phosphodiesterase enzymes contain (I) as active ingredient.
Patent GB-725114-A (GB)
Title: Improvements in and relating to refrigerating systems
IPC: F25B47/02
Filed: 1953-09-25
Abstract: 725,114. Refrigerating. GENERAL ELECTRIC CO. Sept. 25, 1953 [Sept. 27, 1952], No. 26491/53. Addition to 715,002. Class 29. In the arrangement of the main invention for defrosting refrigerant evaporators, a check valve 29 is provided in the trap 20 between the header 13 and the horizontal evaporator 17 to prevent surges of refrigerant up pipe 19 during defrosting or when evaporator 17 is heavily loaded.
Patent GB-289109-A (GB)
Title: Undercarriages for aeroplanes
IPC: B64C25/00
Filed: 1926-10-25
Abstract: 289,109. Gray, W. E. Oct. 25, 1926. Land wheels; shock-absorbers and brakes, applications of; steering.-An undercarriage for an aeroplane comprises two sets of wheels, one set being used for steering, one or both sets being braked, and one or both sets being vertically adjustable to vary the angle of attack, while both sets are mounted on shock-absorbers. Each set may comprise any number of wheels, and where two wheels are used, they are arranged to have a wide track. The rear wheels 1, Fig. 1, are mounted on axles 3 carried by bars 4, and shock-absorbers 5 and are fitted with brakes. The front wheel 10 is mounted in a forked rod 12, which is journaled at 15, Fig. 1, in a bush 22, Fig. 4, flexibly mounted between a rubber disc 24 and a cover-plate 23, and which passes through a screwed tube 33, journaled at 16, Fig. 1. Collars 25, 34 on the rod 12 and the tube 33 are spaced by a spring 36 and connected by a shock-absorber 37, and forked arms 26, 35 on the collars engage a bar 27 operated by the rudder bar 30. The tube 33 passes through a nut 38, Fig. 5, held in a bush 39 between a rubber pad and a housing 40. A screw 45 locates the bush 39 within small limits. The nut is rotated to raise and lower the wheel 10 by chaingearing 43, 44, Fig. 4, which may be powerdriven. The top of the tube 12 is supported by a spring 46. Specifications 9413/07, 19261/10 and 125,695 are referred to.
Patent GB-230752-A (GB)
Title: Improvements in or relating to metallic heads for wooden kegs
IPC: B65D8/00
Filed: 1924-11-07
Abstract: 230,752. Mittinger, G. E. Nov. 7, 1924. Barrels made from slaves; heads.-A wooden keg, barrel, &c. for nails, nuts, rivets &c. is provided with a metal head having an inverted U- shaped periphery which is first forced over the barrel end as shown in Fig. 2 after which a part 12 is forced into a croze groove 3 as shown in Fig. 1. To remove the head the periphery of the part 7 is deformed by hammer blows to draw the part 12 out of the groove.
Patent GB-1034696-A (GB)
Title: Improvements in traps for mice, rats or the like vermin
Inventor: EVANS RICHARD HENRY
IPC: A01M23/30
Filed: 1964-06-27
Abstract: 1,034,696. Animal traps. SELFSET Ltd. May 28, 1965 [June 27, 1964], No. 26696/64. Heading A1M. A vermin trap comprises a jaw 15 having transverse hinge parts biased into hookform pivot members 13, 14 by helical spring means 22 which also bias the jaw to a 'trap-sprung' position. A detent 17 holds the jaw 15 in the set position by engagement with a trigger 24, the jaw 15 when it is swung over to the set position striking the tail 25 of the detent causing it to swing over and engage the trigger. Bait-holding prongs are provided on the trigger.
Patent GB-644285-A (GB)
Title: Improvements in or relating to commutators
Inventor: WILSON CECIL BURNHAM
IPC: H01R43/06
Filed: 1945-10-12
Abstract: 644,285. Commutators for dynamo-electric machines. WATLIFF CO., Ltd. Oct. 12, 1945, No. 26713. [Class 35] The segments 1 of a commutator are each secured by an adhesive film 4 to a core 2. The adhesion surface may be plain or scarfed as shown, heat and pressure being used during adhesion if necessary. The core, which may be of synthetic resin moulded on a bush 5 may have end flanges to give additional purchase to the adhesive or considerable lengths of core may be, fitted with segments and parted off to give separate commutators. For commutators having numerous segments the scarfed surface is replaced by a single V-shaped ridge on the inner surface of the segment secured in a corresponding groove in the core. The segments may be assembled on to the core by placing them at intervals on a flat surface and rolling the core over them. For small commutators having few segments a conical bush may be pressed with adhesive into a metal tube having a tapered bore and, when set, the tube is sawn into separate segments. Disc commutators may be made similarly and the air spaces between the segments may be filled with insulating strips. Specification 644,300 is referred to.
Patent GB-186924-A (GB)
Title: Improvements in the production of enzymes for use in the manufacture of bread
IPC: A21D8/04
Filed: 1922-10-03
Abstract: In producing diastatic and proteolytic enzymes for use in bread-making by cultivating a fungus, especially Aspergillus oryzae, on a cereal medium such as hominy boiled in water, acid is added to the culture medium to inhibit the growth of organisms which produce "ropiness."  The invention is particularly described with respect to lactic acid or a mixture of lactic and phosphoric acids, but sulphuric, tartaric, and citric acids are also mentioned as suitable. In preparing the seeding stock a smaller proportion of water is used than in producing the enzyme, and common salt is added.
Patent GB-658475-A (GB)
Title: Improvements in and relating to self-clamping chucks
IPC: B23B31/22
Filed: 1949-10-18
Abstract: 658,475. Chucks. WEDEVAGS BRUKS AKTIEBOLAG. Oct. 18, 1949, No. 26753. Convention date, Dec. 15, 1948. [Class 83 (iii)] In a spring - closed chuck in which clamping members 5 mounted in a chuck body 1 are controlled by means of cam surfaces 6 provided on a rotatably - mounted sleeve 2, a rotatable and axially slidable sleeve ring 13 is mounted on the sleeve, the ring being adapted frictionally to engage the sleeve when displaced axially so that when so moved, while held against rotation during rotation of the chuck, the sleeve is retarded and caused to rotate relative to the chuck body to release the clamping members against the action of the spring. The sleeve ring is provided with a conical portion adapted to co-operate with a conical portion 14 of the sleeve when the ring is axially displaced. The conical portions may be provided at the lower end of the sleeve and sleeve ring. In a modification, Fig. 5 (not shown), the lower or upper end of the sleeve ring is provided with a friction disc adapted to be pressed against a friction disc at the lower or upper end of the sleeve. In a further modification, Figs. 6 and 7 (not shown), a pressure member is provided between the sleeve and sleeve ring. The Specification as open to inspection under Sect. 91 comprises also a sleeve ring so constructed that it may be compressed radially around the sleeve. This subject-matter does not appear in the Specification as accepted.
Patent GB-488633-A (GB)
Title: Wireless receiver
IPC: H03B5/34
Filed: 1936-10-03
Abstract: 488,633. Valve circuits for wireless reception. OPTIQUE ET PRECISION DE LEVALLOIS. Oct. 3, 1936, No. 26848. Void. Convention date, Dec. 12, 1935. [Class 40 (v)] In a radio receiver in which a local generator is used the local frequency generated is kept constant by means of a quartz or like piezoelectric crystal. The invention may be applied to a heterodyne telegraphic receiver or a superheterodyne receiver. The Figure shows an amplifier 7 and generators 8<1>, 8<11> stabilized by crystals 4<1>, 4<11> in which the secondary frequencies of the beats between the signal and each local oscillator beat together to provide the desired signals.
Patent GB-828543-A (GB)
Title: Improvements in electric motor control systems
IPC: H02P25/32
Filed: 1956-09-03
Abstract: 828,543. Automatic speed control systems. IGRANIC ELECTRIC CO. Ltd. Sept. 3, 1956 [Sept. 2, 1955], No. 26880/56. Class 38 (4). Relates to a D.C. motor voltage and currentlimit control system whereby an A.C. source supplies unidirectional current through thyratron control means. The D.C. motor comprises a field winding 52, supplied by rectifiers 54, 56 from A.C. supply lines L 3 , L 4 , and armature 66 supplied through reversing switch 67 by bridge rectifiers 54, 56, 60, 62. Variation of the gridcathode voltage of thyratrons 60, 62 exerts control over armature voltage. The gridcathode voltage comprises, in series, a negative D.C. feed-back voltage across potentiometer 68 proportional to armature voltage, a positive D.C. reference voltage across potentiometer 70, a positive I.R. drop compensation voltage across potentiometer 77, a negative fixed D.C. bias voltage across resistor 78 and, from the centre-tapped secondary winding 86a in series with each grid, an A.C. bias voltage. The thyratron cathodes are connected through current transformer primary 64a; the secondary circuit comprises rectifiers with load resistors 77, 106 the volt drop across them depending on armature current. The reference voltage circuit comprises transformer 76 and thyratron rectifiers 72, 74 with load resistor 70. D.C. grid control voltage is determined by armature current from potentiometer 106 the grid A.C. bias being provided via transformer 108 from phase-shift circuit-90 degrees advance-112, 114, 116, 118 and resistor 110. The reference voltage across load 70 contributes positive bias in the grid-cathode circuit of thyratrons 60, 62 and current limiting in the control system is achieved by removing the reference voltage by switching off thyratrons 72, 74 due to excessive rise in the current-controlled volt-drop across potentiometer 106. The fixed bias across resistor 78 is provided by rectifiers 82, 84 supplied by transformer 80. A phase lag of about 100 degrees is produced in the A.C. grid bias voltage for thyratrons 60, 62 by components 88, 90, 92, 94, 96, 98. A dynamic braking facility comprises resistor 120 switched in parallel with the motor armature by solenoid 124 when thyratron 126 conducts due to considerably reduced voltage drop across resistor 106. A simpler embodiment of the invention described (Fig. 1, not shown), provides only half-wave thyratron rectifiers for the armature and reference voltages and omits the fixed D.C. bias and the dynamic braking circuit.
Patent GB-204534-A (GB)
Title: Improvements in and relating to means for extracting beer or liquids from barrels or vessels
IPC: B67D1/08
Filed: 1922-10-05
Abstract: 204,534. Smith, F., Hardman, G., Manning, G. W., and Riley, D. Oct. 5, 1922. Relief devices; suction pipes. - The pipe c through which beer &c is drawn from a cask a passes through a hollow member k provided with a valve m for admitting air to the cask and a valve o for the relief of excessive pressure. The pipe c is provided with a tap or cock and a ball &c. valve controlled by a stop. The perforated end s of the pipe c is enclosed in a perforated sleeve c<1>.
Patent GB-807740-A (GB)
Title: Improvements in foam latex slab making apparatus
Filed: 1956-09-04
Abstract: 807,740. Moulding latex from slabs. FIRESTONE TIRE & RUBBER CO. Sept. 4, 1956 [Nov. 25, 1955], No. 26986/56. Class 87(2). A method of contouring the surface of foamed latex carried on a conveyer belt comprises the steps of passing the latex along a converging path comprising means adapted to contour the latex and simultaneously removing heat from the latex to maintain it below the gel temperature. Foamed rubber latex compound of known composition and manner of preparation is fed through a nozzle 26 to form a bank 23 on a conveyer belt 1 which, with co-operating side belts 2, 3 carries the foamed latex beneath an inclined scraper 5 from the rear of which arched walls 6, 7 extend and embrace the path of the latex. The scraper 5 is hollow for the circulation of coolant, e.g. water, alcohol or glycerine to maintain the temperature below the gelling temperature of the latex, i.e. in the range 40‹-60‹F., thereby preventing the formation of gelled particles against the edge of the scraper and thus ensuring that the surface of the produced slab 22 is smooth. Condensate which forms on the cooled scraper from the atmosphere collects in troughs formed between the inclined scraper and an upright plate 12 inclined top surfaces of the walls 6, 7 and upright plates 11, 10, and in a trough formed between the plate 12 and an inclined plate 19 so that it does not drip into the latex and cause blow holes. The scraper is braced in position by straps 13, 14, 15 and is mounted on posts 16, 17 for vertical adjustment.