baber/WOPTO huggingface dataset:
Patent GB-887313-A (GB)
Title: Polymerisation catalysts
Inventor: SMALL PERCY ARTHUR
IPC: C08F10/00
Filed: 1957-12-31
Abstract: A polymerization catalyst is prepared by treating a Group IVa-VIIa or VIII transition metal compound (preferably a halide, e.g. chloride of preferably Group IVa, Va, or Mo or W, particularly of Ti or V, especially TiCl4, VCl4 or TlCl3 and including AlTi3Cl12 made by the method of Specification 877,050 with a compound of formula R R1R2Al(CH2)AlR3R4 wherein the R groups, which may be identical or different are alkyl, cycloalkyl, aryl or aralkyl and n is an integer. It is preferred that:-(a) the Al compound is prepared by reacting an alpha omega dialkali metal derivative of a linear aliphatic hydrocarbon with an Al dihydrocarbon halide; (b) the R groups are alkyl, particularly of up to 4 carbon atoms each; (c) n is 3-6; (d) the mole ratio of the Al compound to transition metal compound is 0,1-1:1; (d) the catalyst is prepared in the presence of a hydrocarbon liquid, e.g. a petroleum ether whose boiling point is over 120 DEG C., said liquid being preferably free from sulphur-containing impurities.  In examples, (Et2Al)2(CH2)5 and (Et2Al)2(CH2)4 are used as the aluminium compounds.ALSO:Ethylene, vinyl hydrocarbons (including propylene, styrene, butadiene and isoprene) and vinyl chloride are polymerized by contact with a polymerization catalyst prepared by treating a Group IVa-VIIa and VIII transition metal compound with R1R2Al(CH2)nAlR3R4 (see Group III).  The following transition compounds are preferred for polymerizing the respective monomers:- (a) ethylene -TiCl4; (b) propylene, giving an isotactic polymer-aTiCl3, including the AlTi3Cl12 of Specification 877,050; (c) styrene, giving an isotactic polymer-VCl4; (d) butadiene-TiCl3 for a rubbery polymer, VCl4 for a crystalline polymer; (e) isoprene -TiCl4 for a rubbery polymer, VCl4 for a crystalline polymer.ALSO:a  : o -bis(diethylaluminium)butane and -pentane etherates are obtained by treating powdered Li with 1 : 4-dibromobutane or 1 : 5-dibromopentane in diethyl ether at about -20 DEG C., adding the dilithium compound obtained to Et2AlBr, removing the LiBr formed and evaporating off the ether under reduced pressure. Specification 877,050 is referred to.
Patent GB-1312337-A (GB)
Title: Method for heat treating polyamide fibres
IPC: D01F6/60
Filed: 1970-08-24
Abstract: 1312337 Heat treatment of polyamide fibres BRIDGESTONE TIRE KK 24 Aug 1970 [26 Aug 1969] 40721/70 Heading B5B In a method for heat treating polyamide fibres the fibres are subjected at least three, and preferably at least five, times alternately to a heat treatment at a temperature in the range 180- 220‹ C. under a tension of 0À60 to 1À59 grams/ denier and to a relaxation treatment at a temperature in the range 180-220‹ C. under a tension of not more than 0À40 g./den. Preferably the heat treatment and the relaxation treatment are carried out for up to 36 seconds each time. Examples relate to the treatment of nylon-6 fibres. The process renders fibres more suitable for use as tyre cord.
Patent GB-1001052-A (GB)
Title: Improvements in or relating to irregularly operating control motions
Inventor: ROSCOE SAMUEL
IPC: D01H5/36
Filed: 1960-11-26
Abstract: In a machine for spinning a carpet yarn of longitudinally varying colour character two sets of back drafting rollers are provided to alternately feed yarns of different colour to a single pair of front drafting rollers, the two sets of back rollers being fed through two clutches which are alternately caused to engage by an irregularly operating control motion (see Division F2). Specification 743,335 is referred to.
Patent GB-1490300-A (GB)
Title: Washing device for cleaning the blanket cylinder of an offset printing machine
IPC: B41F35/06
Filed: 1975-10-06
Abstract: 1490300 Cylinder cleaning in situ HEIDELBERGER DRUCKMASCHINEN AG 6 Oct 1975 [10 May 1975] 40811/75 Heading B6C In a blanket cylinder washing device two axially reciprocating washing rollers 6, 7 supported in floating bearings, operatively engage the blanket cylinder 3 and a doctor roller 58 and inoperatively are disengaged from cylinder 3 and roller 58. A handle 82 operates the device and turns a control rod which has cams on its end, which cams engage the floating bearings of rollers 6, 7, and simultaneously a doctor blade 90 is shifted towards or away from roller 58. A distributor roller 33 supplies washing solution from nozzles 51 which are controlled by a valve 56. Reciprocation of the rollers 6, 7 is produced by angled cams.
Patent GB-1517402-A (GB)
Title: Recliner chair
IPC: A47C1/032
Filed: 1976-10-01
Abstract: 1517402 Reclining chairs HOMECREST INDUSTRIES Inc 1 Oct 1976 [7 Jan 1976] 40844/76 Heading A4J A reclining chair comprises a supporting frame 16 connected for rotational movement to a base 18, a chair back 10 pivotally connected to frame 16 by pins 34, a chair seat 11 pivotally connected to the back 10, and a cam member 65 attached to seat 11 which engages a cross-member 30 of frame 16, so that when the back 10 is tilted backwards the seat 11 is moved forwards and the front of seat 11 is forced upwards by cam member 65 riding over cross-member 30. A bolt (73), Fig. 5 (not shown), engages in a slot (85) within member 65 to limit the travel of the cam member. Springs 57 and 58 connecting a rotatable plate 54 to frame 16 to allow normal rocking of the chair relative to the base 18.
Patent GB-1043398-A (GB)
Title: Improvements in temperature-standard apparatus
IPC: F25B49/00
Filed: 1963-10-16
Abstract: 1,043,398. Automatic temperature control systems. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Oct. 16, 1963 [Oct.19, 1962], No. 40857/63. Heading G3R. A temperature standard apparatus comprises a resistance element 3 formed by an electrically conductive liquid such as water, a thermo-electric Peltier means 6, 7 for withdrawing heat from the element, and a circuit to control the current through the Peltier means in accordance with the temperature of the element. A side view of the apparatus is shown in Fig. 1 which comprises silver plated copper plates 1, 2 having terminals a, b serving as electrodes separated by insulating material 20. The Peltier element comprises p and n type semi-conductor material 6, 7 to which current is fed by copper conductors 8, 9 supported on a copper base plate 11 through a thin layer of insulating material. When the water 3 freezes to ice the ohmic resistance increases from approximately 10 K# to a few M#, this property being used in a circuit (Fig. 3) wherein 3 is the water resistance connected in an A.C. bridge circuit which switches a transistor 13 and through a transistor amplifier 16-17 controls the current in the Peltier element 19. The soldered cold junction of a thermo couple 4, 5,the output of which serves as a reference to another circuit (not shown) is housed in a bore in the plate 2 which is in thermal contact with the resistance element 3.
Patent GB-1106513-A (GB)
Title: Sieve machines
IPC: B07B1/48
Filed: 1965-09-27
Abstract: 1,106,513. Screening apparatus. A. WEHNER. 27 Sept., 1965 [26 Sept., 1964], No. 41007/65. Addition to 1,035,711. Heading B2H. [Also in Division B8] The two sets of parallel carrying members I, II of the parent Specification are mounted for relative movement and linked together by screening members 1 which deform as the distance between adjacent carrying members varies. The carrying members are gyrated by an eccentric shaft (W), Fig. 1 (not shown), so that the screening members 1 alternate between the positions shown by full and broken lines 2. In Figs. 6, 7 and 8 (not shown), the carrying members (8), (9) are mounted in frames (3), (5) respectively, the frame (3) carrying an eccentric shaft for gyrating the other frame on 'its spring-supports (6). An unbalancing weight may be added to set the machine oscillating on springs (7). If desired, the machine may be used in an inclined position. In Fig. 9 (not shown), the carrying members (8), (9) lie parallel to the direction of travel of the material being screened. In Fig. 10 (not shown), the frame (5) carrying one set of carrying members is driven through springs (11), (11<SP>1</SP>) from the other frame (3) which is driven by an unbalance drive (12), (12<SP>1</SP>). The screening members may take the form of rigid portions (15), Figs. 12 and 13 (not shown), joined by elastic elements (16). In Fig. 15 (not shown) the screening members are formed by rods (19) which pass through holes, which may be clearance holes, in elastic longitudinal members (17). In Figs. 17 and 18 (not shown), the screening members are arched, hinged by beads (23) and, if desired, supported by members (21). In some embodiments, the screen may take the form of a perforated rubber plate. The screen may be rapped clean by balls (18), (18<SP>1</SP>) Fig. 16 (not shown), suspended below the screen. A cleaning action also occurs in Fig. 19 (not shown) where a cross-member (24) is arranged to strike the bottom of the screening member (22); if desired the cross-member (24) may support a fine screen.
Patent GB-1487016-A (GB)
Title: Sulphated castor oil substitutes
IPC: D06M13/224
Filed: 1975-10-07
Abstract: 1487016 Sulphated castor oil substitute DIAMOND SHAMROCK CORP 7 Oct 1975 41071/75 Heading DIP A sulphated mixture of 10-70% by wt. of at least one aliphatic alcohol (4-30C) and 90-30% by wt. of at least one unsaturated oil is used as a substitute for sulphated castoroil for treating textiles. The alcohols may be derived from many sources but (8-16C) Oxo process bottom alcohols are preferred. Many oils, animal, vegetable and fish, are specified, mustard seed oil and peanut oil being preferred. The sulphated mixture may be extended with up to 4 times its weight of mineral oil. Natural, man-made and synthetic fibre textiles may be softened using the products. Examples relate to the treatment of 100% unmercerized cotton. 50/50 polyester/ cotton blend and 100% nylon taffeta fabrics.
Patent GB-1414723-A (GB)
Title: Method of filling water bearing shot holes with explosives
IPC: F42D1/10
Filed: 1973-08-31
Abstract: 1414723 Blasting DYNAMIT NOBEL AG 31 Aug 1973 [1 Sept 1972] 41209/73 Heading E1F In a method for filling water-filled shot holes with uncased explosives of powder form, the explosives, e.g. ammonium nitrates, swelling agents and/or water-repelling agents, are blown by compressed air through a flexible tube that is entered into the shot hole and is so subsequently withdrawn therefrom, either continuously or intermittently, that the discharge end of the tube is below the water present in the shot hole at a spacing not exceeding 50 cms, preferably 10 cms, from initially the bottom of the shothole or subsequently the surface of the introduced explosive. Thus water is forced back as the explosive is discharged in a sheath of air from the tube into the shot hole. The ammonium nitrate may be present both in the form of prills and powder, the wet ratio of prills to powder by weight being 2:1. The prills preferably have a screened size range of 0.2 to 20 mm. Two explosives compounded as stated to have different energies may be introduced into a shot hole, the higher energy explosive being entered into the shot hole first. These powder explosives reach the tube from the bottom of a hopper in which the lower energy explosive is piled on the higher energy explosive.
Patent GB-1124945-A (GB)
Title: Improvements relating to pre-payment systems
Inventor: HAIGH JAMES DURHAM
IPC: G07F7/02
Filed: 1964-10-09
Abstract: 1,124,945. Ticket cancelling; token-freed apparatus. PLESSEY-UK Ltd. 24 Sept., 1965 [9 Oct., 1964], No. 41217/64. Headings G4T and G4V. [Also in Division B8] In pre-payment equipment capable of accepting, in the payment of charges, magnetic tickets each comprising a support member bearing spaced magnetically coded parts each corresponding to the same value, magnetic, field sensing means responds to theinsertion ofa ticket and sensing of a first coded part to. initiate operation of apparatus with which the equipment is associated and. the ticket is drawn further into theequipment at predetermined timed intervals for the sensing of further coded parts. As illustrated, when the magnetic ticket 2 is introduced into slot 1 of a telephone coinbox the foremost end engages stop means so that a first magnetically coded strip on the ticket is read by sensing heads 3. At the end of a: first timed period, rolls 5 advance the ticket to a position at which a second, magnetically coded strip is read by heads- 3 and so on. At the end of a telephone call, the used. strips may be severed by a knife 6 or may be erased. The coded strips; may be of ferrite material, e.g. barium ferrite. The equipment may be applied also to television and radio-pre-payment meters or to payments for car parking or public travel.
Patent GB-957307-A (GB)
Title: Spacer members for paper slitting and similar machines
IPC: B26D7/26
Filed: 1960-12-01
Abstract: 957,307. Washers. D.E.K. GRANT. Sept. 15, 1961 [Dec. 1, 1960], No. 41249/60. Heading F2H. [Also in Division G1] A washer 1 for spacing the knives of a paperslitting &c. machine has a slot 2 extending from the periphery of the washer so that it may be positioned laterally on the knife-shaft. The base of the slot may be shaped to engage a square &c. shaft, and the periphery is notched at 6 and knurled or serrated &c. to facilitate handling. The metal, synthetic resin &c. washer may bear an indication of its thickness and have its horns 4 rounded or chamfered.
Patent GB-1222046-A (GB)
Title: Method of preventing rack plating in continuous plating cycle for non-conductive articles
IPC: C23C18/16
Filed: 1969-08-19
Abstract: 1,222,046. Coating with metals. MACDERMID Inc. Aug. 19, 1969 [Dec. 2, 1968], No.41403/69. Heading C7F. In a process of plating plastics articles by first forming a Ni or Cu electro-less coating and then electro-plating Ni or Cr, in which the articles are carried by racks sheathed in plastics, the racks are immersed in an aqueous solution containing hexavalent chromium to prevent electro-less plating on the plastics sheaths. The electro-less plating may be conventional using activating and sensitizing palladium and stannous chloride solutions and copper sulphate, formaldehyde, triethomolamine or nickel chloride, aminocetic acid, sodium hydroxide, sodium hypophosphate solutions. Examples are described of plating nylon, polystyrene, polysulphone, A.B.S., and polypropylene articles on p.v.c. plastisol sheathed racks or A.B.S. articles on polypropylene sheaths. The plastics articles may be etched before plating in a 14% wt. chromic and 40% sulphuric acid solution.
Patent GB-926436-A (GB)
Title: Improved spring assembly for mattresses and the like
IPC: A47C27/07
Filed: 1961-11-20
Abstract: 926,436. Mattresses &c. F. H. JACOBS, and I. W. LEVINE, [trading as SPRING PRODUCTS DEVELOPING CO.]. Nov. 20, 1961 [April 7, 1961], No. 41447/61. Class 52 (4). A mattress spring assembly has spiral compression-springs 10 in rows and columms connected by tie wires 16, 18 and links 20, the wires 16 having sets of three loops 22, 24, 26 formed at spaced intervals to receive the end portions 12 of the springs 10 and the co-operating straight tie wires 18.
Patent GB-1461866-A (GB)
Title: Measurement of optical  properties of surfaces
IPC: G01B11/30
Filed: 1974-09-24
Abstract: 1461866 Reflectometers A R L ROSS 18 Sept 1975 [24 Sept 1974] 41468/74 Heading G2J Surface roughness is measured by an optical system in which light from source e is reflected from a first test surface S on to a second test surface S (in Fig. 2, the two surfaces are identical) e.g. by the use of a retro-reflecting sheet R. The arrangement is such that translation and/or rotation of the surfaces S has substantially no effect on the positional and/or angular distribution of reflected radiation in the regions where it is measured. Roughness may be assessed according to:- (1) The spread of reflected radiation about the specular direction, (2) The variation in reflectivity with wavelength, or (3) the depolarisation of the radiation. In Fig. 3 (not shown) the retro-reflecting sheet R of Fig. 2 is replaced by a cube-corner reflector and in Fig. 4 (not shown) by an array of cubecorners. In Fig. 5 (not shown) the two test surfaces form a corner reflector. In Fig. 6 (not shown) a polarizer and an analyzer are added to the system of Fig. 2 while in Fig. 7 (not shown) an optical modulator is used to separate the retro-reflected signal from that due to diffusely reflected radiation.
Patent GB-1416926-A (GB)
Title: System for controlling the speed of a vehicle constrained to follow a predetermined path
IPC: B61L27/04
Filed: 1973-09-05
Abstract: 1416926 Train control REGIE AUTONOME DES TRANSPORTS PARISIENS and INTERELEC 5 Sept 1973 [5 Sept 1972] 41760/73 Addition to 1358358 Heading B7N The safety arrangement described in Specification 1,358,325, in which emergency braking is applied to a railway vehicle when a comparator, comparing a fixed voltage which is a function of speed limit with a pulsed signal having an amplitude which is a function of the time taken by the vehicle to travel a track section, ceases to provide a pulsed output signal A, is modified by delaying the emergency braking until the vehicle has travelled a length of track greater in length than the largest track section. As the vehicle passes the end of a track section a pulsed signal A is applied to charge a capacitor 3 which discharges via transistor 17 when this is biased on by a pulse B developed in source 1 each time the vehicle travels a set distance (small compared with the length of a track section). During the discharge periods the transistor circuit oscillates providing a pulsed high frequency signal having an amplitude which is a function of the charge on capacitor 3 and this is applied via demodulating and impedance matching circuits to a comparator 41 where it is compared with a voltage applied to terminal 42. As the amplitude of the demodulated signal is a measure of distance travelled by the vehicle after the capacitor 3 is charged by a pulse A the fixed voltage is arranged at a level to which the amplitude of the demodulated signal will drop after the vehicle has travelled the distance greater than the largest track section. When the vehicle is travelling within its speed limit, pulses A are continuously provided so that the comparator provides output pulses (at the rate of pulse B) which are shaped in flip-flop 47 and charge a capacitor 49 which continuously discharges via transistor high frequency oscillator 52 maintaining this in oscillation. The high frequency signal is amplified and rectified to provide a signal which holds off the emergency brake. If the vehicle exceeds its limit the next pulse A ceases so that after the said distance has been travelled the input voltage to the comparator 41 drops below the set level so that the comparator output ceases, stopping the oscillation and removing the signal which holds off the emergency brake. The discharge path via transistor 52 of the capacitor 49 is such that should the vehicle speed drop to a very low level the capacitor discharges completely stopping the oscillation and initiating emergency braking so that the vehicle is stopped when there is any danger of it stopping on, e.g. a hill and running backwards.
Patent GB-1294005-A (GB)
Title: Trailers
Inventor: SLAUGHTER PETER MICHAEL
IPC: B62D53/06
Filed: 1970-09-01
Abstract: 1294005 Trailers CRANE FRUEHAUF TRAILERS Ltd 1 Sept 1970 41770/70 Heading B7B A low bed trailer is of the kind having front and/or rear end assemblies which can be detached to facilitate loading. The trailer has a main frame 1 having a sloping end 2 carrying a heel 3 engaging an inverted U-shaped member 7 between side members 6 forming part of the detachable end assembly. The assembly has a reaction pad 9 and a plate 10 spaced a distance B from the frame 1 and a removable locking pin 14 fitting between recesses 12 and 13 to prevent relative vertical movement between the frame and end assembly.
Patent GB-1103992-A (GB)
Title: Adaptive process controller
IPC: F22B35/18
Filed: 1965-10-01
Abstract: 1,103,992. Automatic control. LEEDS & NORTHRUP CO. Oct. 1, 1965 [Oct. 20, 1964(2)], No. 41821/65. Heading G3R. In a system for automatically restoring a variable to a set point, the magnitudes of proportional and rate and/or integral control signals developed from an error signal are automatically modified in dependence on a further variable to produce a desired response. Boiler pressure. In Fig. 1 (not shown), a gauge 50, responsive to the pressure in a boiler 30 supplying steam to a turbine 32, actuates a potentiometer 56 in a D. C. bridge circuit 60 having a further potentiometer 64 to set a desired pressure. Output e 2  from the bridge, when boiler pressure differs from the desired value, is applied through a gain setting potentiometer 100 and an amplifier 114 to operate a servomotor 40 which corrects the pressure by adjusting a valve 36 controlling the fuel supply to the boiler. A relay 10 energized from a pulse generator 152 operates switches 10A, 10B to periodically introduce an error rate signal from an adjustable resistancecondenser network C 1 , 106 and a correction rate signal from a resistance-condenser network C 2 , 140 associated with a potentiometer 120 operated by servomotor 40. To produce a suitable modification of the response of the control system under different load conditions, a wattmeter 90, measuring the power output of a generator 94 driven by the turbine, adjusts a potentiometer 84 to vary the voltage applied to the bridge circuit and to vary the mark-space ratio of pulse generator 152 so that the rate components are effectively reduced with increase of load. Relay 10 instead of operating in an on/off manner as shown may operate between two positions which select resistance-condenser networks having different time constants. A suitable pulse generator involving a transistor-controlled integrating amplifier and single-shot circuits is described with reference to Fig. 4 (not shown). Thickness of rolled metal. In Fig. 2 (not shown), a gauge 210 responsive to metal thickness controls the vertical position of a roll 200 by means of a control system similar to that described above for boiler pressure but differing in that (a) a filter 201, described with reference to Fig. 3 (not shown), eliminates noise (b) no error rate component is provided and (c) the mark-space ratio of relay 10, which controls the correction rate signal and the time constant of the filter, is controlled by a single short circuit responsive to a contact 240 operated magnetically in dependence on the speed of travel of the metal. Analogue or digital control. A control system is described in which three adjustable components of control are produced from the error signal by (a) differentiation (b) multiplication of the error and adaptive signals and (c) multiplication of the error signal by the square of the adaptive signal and integrating the product.