baber/WOPTO huggingface dataset:
Patent GB-815521-A (GB)
Title: Process for polymerizing olefinic hydrocarbons
IPC: C08F10/00
Filed: 1955-07-04
Abstract: Polymers of at least one 1-olefin are made by a continuous process which comprises contacting a solution of the olefin in a liquid solvent with a catalyst under polymerizing conditions, subsequently separating normally solid polymer from the solvent, unreacted olefin and volatile inert impurities, subjecting a stream of the solvent, unreacted olefin and volatile inert impurities to fractionation, separating from the <PICT:0815521/IV (a)/1> fractionation two streams the first consisting essentially of inert impurities and unreacted olefin and the second stream consisting essentially of solvent, and either withdrawing the first stream from the polymerization system when the conversion per pass through the polymerization zone or zones is at least 85 to 90 per cent or recycling unreacted gaseous olefin when the conversion per pass drops below 85 to 90 per cent.  When the conversion per pass drops below 85 to 90 per cent the unreacted olefin may be reccyled direct to the polymerization zone or concentrated and purified prior to recycling to the polymerization zone.  The olefin may be ethylene, propylene, 1-butene, 1-pentene or 1-hexene.  Suitable solvents are iso-octane, n-pentane, n-heptane, n-decane, or n-dodecane.  The preferred catalyst is a composite comprising chromium oxide and at least one oxide selected from oxides of silicon, aluminium, zirconium, or thorium, in which at least a portion of the chromium is in a hexavalent state.  The process may be carried out using the arrangement shown in the Figure, the olefin is absorbed in the inert solvent in tank 1, polymerized in zones 4 and/or 5, and the effluent therefrom flashed in zone 10 from which molten polymer is recovered via orifice 11, and the solvent, unreacted olefin, and inert volatiles withdrawn through condenser 13 and fractionated in column 14.  The solvent is withdrawn via pipe 25 and purified in accordance with the process of Specification 815,520 whilst the unreacted olefin and inert volatiles are withdrawn via pipe 15. These volatiles and unreacted olefin are according to the percentage per pass either removed from the system via pipe 16 or returned to the polymerization zones via pipe 17.  The olefin content in the mixture of volatiles and olefin may be determined automatically.  Specification 790,195 is referred to.
Patent GB-942745-A (GB)
Title: Process for the manufacture of polyoxymethylenes
IPC: C08G2/00
Filed: 1959-12-04
Abstract: Polyoxymethylenes are prepared by polymerising at 0 to -70 DEG C a polymeric acetal especially trioxane in the presence of a cation-active catalyst in a pure inert organic solvent which dissolves the monomer partially or completely and is a non-solvent for the resulting polymer. Specified catalysts are boron trifluoride, boron trifluoride-diethyl ether, boron trifluoride-tetrahydrofuran ferric chloride, zinc chloride, cadmium chloride, tin tetrachloride, antimony tri and penta chlorides and titanium tetrachloride. The catalysts may be used alone or with cocatalysts e.g. water, tertiary butanol, acetic acid, trichloracetic acid, perchloric acid, benzyl chloride and bromide, benzoylchloride, acetylchloride, benzotrichloride and trinitrobromomethane. The catalyst and the trioxane may be added continuously or may all be present at the start of the polymerisation.  Specified solvents are cyclohexane, aliphatic hydrocarbons, methylene chloride, chloroform, carbon tetrachloride, nitromethane nitroethane and mixtures thereof.
Patent GB-1275003-A (GB)
Title: Production of fluorosilicones
Inventor: BROWN ERIC DAVISON
IPC: H01G4/22
Filed: 1970-08-28
Abstract: 1275003 Clay-catalysed polymerization of fluoropropyl polysiloxanes DOW CORNING CORP 28 Aug 1970 [29 Sept 1969] 41449/70 Heading C3T [Also in Division C5] Linear poly - 3 : 3 : 3 - trifluoropropylmethylsiloxanes are prepared by heating (1) cyclotri (3:3:3 - trifluoropropylmethylsiloxane) with (2) a siloxane (CH 3 ) 3 SiO[CF 3 CH 2 CH 2 (CH 3 )SiO] 0-10 Si(CH 3 ) 3  in contact with (3) an acid aluminium silicate clay for at least one hour at 75-90‹ C., then at 120-140‹ C. until the cyclic siloxane is completely consumed. The viscosity of the product is determined by the ratio (1) : (2) and is generally 100-300,000 cS/25‹ C. There is preferably used 2-5 wt. per cent of catalyst (3), which may be removed by filtration, optionally from solution, e.g. in CH 2 Cl 2  as in Example 1.
Patent GB-898722-A (GB)
Title: High speed punch mechanism
IPC: F16H31/00
Filed: 1959-03-25
Abstract: 898,722. Selective punching machines. SOROBAN ENGINEERING Inc. March 25, 1959 [Dec. 9, 1958], No. 41734/59. Divided out of 898,721. Drawings to Specification. Class 31 (2). [Also in Group XXIV] The subject-matter is the same as Specification 898,721, but the claims are directed towards the cam and follower mechanism for reciprocating the punch bail. Specifications 840,114 and 876,324 also are referred to.
Patent GB-1525125-A (GB)
Title: Suspension device especially for a ceiling
IPC: E04B9/20
Filed: 1975-10-14
Abstract: 1525125 Suspended ceiling hangers HUNTER DOUGLAS INDUSTRIES BV 14 Oct 1975 [14 Oct 1974] 42049/75 Heading E1W A hanger for a suspended ceiling comprises a rod 2 which passes through apertures 6, 7 in arms 4, 5 of a device 1 made of resilient sheet material, the apertures each having a slot, e.g. 10 extending from one edge of the aperture and allowing material adjacent the slot to be bent to allow the edge of the aperture to take up a helical configuration. A downward movement of the rod will now tend to cause a rotation of device 1, and vice versa. Fingers 14, 15 at the bottom of device 1 are bent slightly out of the plane to allow them to be pushed into an overlapping configuration, whereupon they can both be pushed into an aperture 12 in a ceiling member 13, whereafter they open out when recesses (18, 19) (Fig. 3, not shown) engage the edge of the aperture 12. The portion 9 of device 1 may be bent out of the plane thereof, and the fingers may be bent out of the plane of portion 9 (Fig. 4, not shown) so as to be closer in line with rod 2.
Patent GB-1511487-A (GB)
Title: Loudspeaking telephone instruments
IPC: H04B3/20
Filed: 1974-09-27
Abstract: 1511487 Loudspeaking telephones GENERAL ELECTRIC CO Ltd 23 May 1975 [27 Sept 1974] 42099/74 Heading H4R In a loudspeaking telephone in which signals on the send or receive path are selectively attenuated in accordance with the relative amplitudes of the signals in those paths, as deteremined by a comparator fed with the rectified signals of the respective paths, at least one of the signals fed to the comparator is reduced by an amount proportional to the mean level of the signal in the respective path taken over a period of the order of a second to reduce the effect of ambient noise on the operation of the comparator. As described the send path 1 and receive path 2 each contain a variable attenuator comprising the source drain path of a FET, the impedances of the paths being differentially varied by the output of comparator 16 which compares the signal level in the two paths as determined by rectifier circuits 14, 15 connected to monitor the signals on either side of the attenuator circuits in each path. The rectifier circuits, Fig. 2, comprise operational amplifiers 19 having diodes 21 in their feedback circuits, to give them rectifier characteristics, together with additional diodes 25 which form signal limiters by increasing feedback on high signal levels. A D.C. voltage proportional to signal level appears on capacitor 26 as the signal to feed the comparator. This signal is also fed to the input of a second differential amplifier 29 and, via resistor 34 and capacitor 32 having a time constant of about 5 seconds, the output voltage of amplifier 29 is fed to the second input of differential amplifier 19, to be subtracted from the D.C. voltage resulting from the A.C. signal inputs at 17, 18. The diode 33 is arranged to be reverse biased by a fall in the voltage on capacitor 26, as when a speech signal ends, so as to remove the negative feedback from the amplifier 29, the resulting rapid decrease in voltage at the output of amplifier 29 causing diode 35 to conduct to rapidly discharge capacitor 32 so that the voltage fed to the second input of amplifier 19 rapidly follows decreases in the signal down to the ambient noise level, i.e. is primarily responsive to the ambient noise level. Similar circuits can be used for both rectifiers 14 and 15, Fig. 1, if circuit conditions require.
Patent GB-1236046-A (GB)
Title: Vacuum-cleaner mouthpiece
IPC: A47L9/06
Filed: 1968-09-05
Abstract: 1,236,046. Vacuum cleaner nozzles. LICENTIA PATENT-VERWALTUNGS-G.m.b.H. 5 Sept., 1968 [6 Sept., 1967], No. 42343/68. Heading A4F. In a vacuum cleaner mouthpiece, provided with a carpet nozzle 1, surrounded by an annular brush 2, mounted in a working tool 3, relatively movable to the nozzle into or out of the working positions, a pivotal movement of a suction nozzle 8 rotates a spindle 7, on the ends of which spindle are mounted cams 14, to a position in which an edge 22 on the nozzle 8 engages a projection 21 on the working tool 3 to move the tool 3 downwardly relative to the nozzle 1 and to rotate the cams 14 to a position in which the ends of supporting arms 16, projecting through slots 17 in a plate 9 of the tool 3, engage the top of the plate 9 to hold the tool 3 in the lowered position, Fig. 4 (not shown). A projection 19 on one of the arms 15 lifts a release knob 20 when the tool 3 is lowered and manual depression of the knob 20 permits the tool 3 to be returned to the inoperative position by springs 13. An indicator flap 23, Fig. 3 (not shown), is visible through a window 24 to show if the nozzle 1 or tool 3 is in the operative position. A lip-seal 27 is provided between the nozzle 1 and tool 3, Fig. 4 (not shown).
Patent GB-1484922-A (GB)
Title: Cutting rings from a tube
IPC: B23D21/04
Filed: 1974-09-30
Abstract: 1484922 Tube-cutters PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 30 Sept 1974 [3 Oct 1973] 42346/74 Heading B3J A device for cutting rings from a cylindrical tube 21 comprises a frame 2 supporting an annular die 1. Co-operating with one or more disc cutters 9 mounted with axial play in radially movable slides 8, means for moving the tube longitudinally within the die and a guide plate 27 carrying pins 37 engaging the die 1 by means of pins 39 and a flange 38 pressing the cutter(s) 9 against the action of spring(s) 10 towards the die 1 to maintain the required cutting clearance. The slides are carried by a cutter head 3 mounted on a shaft 5 rotatable by an hydraulic motor 16 and are moved radially via levers 11 by hydraulic cylinder 14. The tube is slid along the die by pins 22 on a pneumatically driven yoke 23 and is clamped against the die by hydraulically driven pistons acting on a lever 19. The guide plate 27 is connected by links 28 to a shaft 29 which is rotatable by rack and pinion 32, 33 to move the plate away and allow a new workpiece to be inserted. The plate is moved into operative position by an hydraulically driven draw bar 34. The length of the pins 39 is equal to the thickness of the disc cutter(s) and the length of the pins 37 equals the length of the flange 38 plus the cutting clearance.
Patent GB-1012724-A (GB)
Title: Improvements in or relating to driving-belt shifting apparatus
IPC: F16H7/22
Filed: 1961-11-29
Abstract: 1,012,724. Electric motor driving arrangements. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Nov. 29, 1961 [Dec. 2, 1960], No. 42666/61. Heading H2A. [Also in Division F2] A tape recorder or other constant speed apparatus for reproducing sound or pictures is driven by an induction motor 1, which may run at either of two speeds depending on the mains frequency (50 c/s. or 60 c/s.), through changespeed belt gearing (see Division F2). The motor 1 drives a pair of coaxial pulleys 3, 4, and a belt 6 is shifted from one to the other, according to the mains frequency, by a single revolution of a manually-operable member 8 having a cranked part 12 extending between the belt runs. A stop lever 23 ensures alternate clockwise and anticlockwise revolutions of the member 8.
Patent GB-1059734-A (GB)
Title: Improvements in or relating to manual control means
Inventor: BAGSHAW GEORGE WILLIAM
IPC: H03J1/14
Filed: 1962-11-12
Abstract: 1,059,734. Adjusting radio apparatus. PLESSEY-U.K. Ltd. Jan. 16, 1964 [Nov. 12, 1962], No. 42687/62. Heading H3Q. A tuning control for a radio receiver comprises a knob, Fig. 1, mounted upon the shaft of the tuning capacitor and comprising in a recess in its inner surface a ball 17 which during rotation of the knob engages in elongated recesses 16d in the sprung portion 16b of a spring plate, Fig. 3, whose central portion 16a is secured to the front surface of an escutcheon plate 13 mounted beneath the knob 12. Thus when tuning-in, the approximate location of a pre-selected station may be determined by feel as the ball 17 drops into the respective recess 16d, the length of the recess being sufficient to permit subsequent fine. tuning.
Patent GB-1112632-A (GB)
Title: Stainless steel
IPC: C22C38/28
Filed: 1966-09-26
Abstract: 1,112,632. Stainless steels. CRUCIBLE STEEL CO. OF AMERICA. Sept. 26, 1966 [Sept.27, 1965; Sept. 8, 1966], No.42834/66. Heading C7A. A ferretic (less than 5% martensite) stainless steel has the following percentage composition: - Cr 10 - 14 C up to 0-1 Mn up to 1 N less than 0À05 Ti 0À2 - 1 A1 less than 1À5 Si 0À8 - 3 Fe the balance. The steel may be used for I. C. engine silencers and for cargo boxes.
Patent GB-1103320-A (GB)
Title: Improvements in or relating to spectrometric apparatus
Inventor: WEBB ROBERT JOHN
IPC: G01J3/12
Filed: 1965-10-08
Abstract: 1,103,320. Spectrometers. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Sept.19, 1966 [Oct. 8, 1965j, No.42886/65. Heading G2J. Spectrometric apparatus comprises a Czerny- Turner mounting in which the conventional object and image slits 25, 31 are both used as object slits and an image slit 30, 35 is positioned optically close to each of the object slits so as to provide a double beam instrument. The image slits 30, 35 are defined by apertured mirrors and photocells 32, 36 are positioned to receive light of selected spectral lines which passes through the image slits, while further photo-cells 33, 37 receive reflected background light. The apparatus is used, for example, to determine the oxygen and nitrogen contents of steel samples. The oxygen and nitrogen spectra of a sample are excited in a chamber having two windows through each of which one of the spectra is observed. Light from the two windows is passed through the object slits 28, 31 into the spectrometer.
Patent GB-1058004-A (GB)
Title: Rotary burnt paper and fly ash arrestor
IPC: F23J15/00
Filed: 1964-10-21
Abstract: 1,058,004. Spark arresters. K. R. MORTON. Oct. 20, 1965 [Oct. 21, 1964], No. 42992/64. Heading F4J. A paper and fly ash arrester for insertion in a chimney comprises an openwork horizontally rotatable drum 2 mounted within a housing 1 to which are attached, on opposite sides thereof, hoppers 7 into which paper &c. is swept by two wire brushes 17, diametrically opposed around the drum 2, when said drum is rotated by means of a pulley 12 and chain 14 or a geared electric motor. The openwork drum 2 is formed from perforated stainless steel sheet or stainless steel wire mesh wound on a frame, half the projected area of the apertures being substantially equal to the cross-sectional area of the chimney so as not to impose any restriction on the gas flow.
Patent GB-1480779-A (GB)
Title: Apparatus for determining the position of an object
IPC: G01S5/04
Filed: 1974-10-04
Abstract: 1480779 Position measurement COAL INDUSTRY (PATENTS) Ltd 28 Aug 1975 [4 Oct 1974] 43129/74 Heading H4D The position of an object along a fixed path is determined by transmitting a modulated RF signal at that position; receiving the signal at the two ends of a leaky feeder line which picks up the RF signal; demodulating the signals received at both ends; sending the demouldated signal at one end along the line to the other end; and measuring the phase difference between the two demodulated signals at said other end. The object may be a railway wagon, a lift cage, an object on a conveyer, or coal-cutting machinery moving along a coal face. In the embodiment shown, a leaky coaxial cable or twin conductor line 1 picks up an RF signal (e.g. of 30-500 MHz) from 2, modulated at, e.g. 200 kHz. This signal is demodulated at 6 and 9. Phase comparator 10 receives the output of demodulator 9 directly, and the output of demodulator 6 via line 1 and RF chokes 4, 7. The phase difference is represented on meter 11, which is calibrated in distance units. The modulation frequency has two selectable values to provide "coarse" and "fine" distance resolution respectively and to resolve ambiguity if the phase difference exceeds 180 degrees (or 360 degrees, depending on the type of phase comparator 10 used).
Patent GB-1058232-A (GB)
Title: Improvements in garments for aviators
Inventor: SIMPSON ROBERT EMMERSON
IPC: B64D10/00
Filed: 1963-11-01
Abstract: 1,058,232. Pressure suits. MINISTER OF AVIATION. Dec. 10, 1964 [Nov. 1, 1963], No. 43245/63. Heading A3V. A pressurized suit for airmen comprises a double-walled jerkin 11 and helmet 12 with breathing compartment supplied with oxygen via a pipe 17 and an integral airpressurized, single-walled suit 10, including wrist and neck seals 14-16 and boots 13, which can be temporarily de-pressurized at will by means of a relief valve 24 and discharge valves 21 to give greater freedom of movement. During normal flight, conditioning air is supplied to the suit 10 by a pipe 19 and escapes through valves 21. On loss of cabin pressure oxygen is supplied to the jerkin and helmet and passes through a flow restriction 22 and pipe 23 to a pressure chamber in each valve 21 which closes their respective obturating members. With the valves 21 closed, air supplied by pipe 19 pressurizes the suit 10 outside the jerkin 11. If this supply fails oxygen passes from the jerkin to the suit through a valve 20. To obtain greater mobility, the wearer can, by depressing a spring loaded plunger (not shown), open a relief valve 24 which exhausts to atmosphere the oxygen supply to the discharge valves 21 which thus open to depressurize the suit 10. Release of the plunger reverses the operation. In a further embodiment, not described in detail, a sleeved double-walled jerkin has air pressurized bladders at the shoulder which can be depressurized in the same way as the suit 10.
Patent GB-1405652-A (GB)
Title: Process for the preparation of amines suitable for incorporation as additives into lubricatns and fuels
IPC: C10L1/22
Filed: 1972-09-19
Abstract: 1405652 Polyolefin derivatives SHELL ININTERNATIONALE RESEARCH MAATSCHAPPIJ NV 19 Sept 1972 [21 Sept 1971] 43294/72 Heading C3P [Also in Division C5] Polyamines suitable for use as lubricant and fuel additives are prepared by reacting a halogen-substituted polyolefin of molecular weight at least 500 and a polyamine, with liberation of hydrogen halide, in the presence of successively a basic alkali metal compound and a basic alkaline earth metal compound, and removing solid constituents from the resulting mixture. The polymer may be a chlorinated polyethylene, polypropylene, polybutene or ethylene/propylene copolymer. The polyamine may be an ethylenediamine, propylenediamine, butylenediamine, N,N-dimethylpropylenediamine, diethylenetriamine, triethylenetetramine or tetraethylenepentamine. Specified metal compounds are sodium, potassium and lithium hydroxides and carbonates, and calcium, strontium and barium oxides, hydroxides and carbonates. Solids may be removed by filtration, optionally after adding a C 1-3  alkanol. In examples chlorinated polyisobutylene is reacted with (I) tetraethylene pentamine and (III) N,N-dimethyl propylene diamine in the presence of sodium carbonate with subsequent addition of calcium hydroxide, and the products diluted with heptane and methanol and filtered.
Patent GB-1391744-A (GB)
Title: Tubular carton
IPC: B65D17/34
Filed: 1973-09-14
Abstract: 1391744 Cartons H REISMAN 14 Sept 1973 [31 Jan 1973] 43322/73 Headings B8P and B8D A tubular cardboard' carton has an end closure 12 adapted to be secured within the tubular wall by means of tabs 18 and formed with lines of weakness 20 which divide the end closure into a major portion 26 and at least one other portion 22, 24. To open the carton the lines of weakness are broken and the portion 26 is hinged upwards about a tab 18. The portions 22, 24 may be hinged downwardly into the carton. Handholes 29 are provided in the portion 22.
Patent GB-1141342-A (GB)
Title: Hydrazine composition
Inventor: GARCIA HENRI
IPC: C01B21/092
Filed: 1966-01-04
Abstract: 1,141,342. Absorbing hydrazine. CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE. 4 Jan., 1966 [6 Jan., 1965], No. 43510/68. Divided out of 1,141,341. Heading C1A. N 2 H 4 .H 2 O is absorbed on a porous support. The composition liberates anhydrous N 2 H 4  in a reaction medium, and retains the water of hydration. The support is preferably granulated activated SiO 2  gel, and may contain up to 17 wt. per cent N 2 H 4 . The gel may be prepared by neutralizing Na silicate with HCl, drying the ppt. at 120‹ C., roasting at 300‹ C., washing, and drying at 400‹ C. The gel is then granulated, and N 2 H 4 .H 2 O is added with cooling. The product is used to liberate N 2 H 4  for reaction with S 4 N 4  or S 4 N 3 Cl in an inert anhydrous organic liquid as described in Specification 1,114,341.
Patent GB-1458170-A (GB)
Title: Linear drives
IPC: B21C1/30
Filed: 1975-10-24
Abstract: 1458170 Toothed gearing FRIEDRICH KOCKS 24 Oct 1975 [28 Oct 1974] 43717/75 Heading F2Q A toothed rack 1 is mounted in a guide bed 2 and is adapted to be longitudinally displaced by a plurality of drive motors 4 each rotating a pinion 6 meshing teeth 7 located on the underside of the rack 1. The motors 4 are all disposed on one side of the rack and are alternately staggered relatively to one another. The mechanism is applied to a tube push bench.
Patent GB-1069788-A (GB)
Title: Improvements in or relating to electric accumulators
IPC: H01M50/103
Filed: 1963-11-06
Abstract: The solar energy collector disclosed in Specification 1,043,783 comprising a thermally conductive base, a barrier layer of a thermally refractory material and a receiver layer comprising a fused mixture of gold and glass is modified by the application of a thin optically interfering layer of a solar energy transmitting thermally refractory material over the receiver layer.  The optically interfering layer consists of a refractory oxide such as alumina, silica or ceria or mixtures thereof and is 0.1 to 0.4 microns thick.
Patent GB-1067950-A (GB)
Title: A device for fastening and directionally setting a headlight
IPC: B62J6/00
Filed: 1965-10-18
Abstract: 1,067,950. Vehicle lamp mountings. PROJECTEURS CIBIE. Oct. 18, 1965 [Oct. 16, 1964], No. 44105/65. Heading F4R. [Also in Division E2] A device for adjustably mounting a vehicle lamp consists of a pair of brackets each having a flange 2a, 2b secured to the lamp and a second flange 3b having a hole to receive a pin 11a, 11b on opposite ends of a body 9 having a bolt 8 extending at right-angles to the axis of the body to pass through a hole 13 in a block 12 which is seated on a flat part of the vehicle. The block 12 is first adjusted on the vehicle surface and the inclination of the beam from the lamp is then adjusted by tilting it about the axis of the body, a nut being finally tightened to secure the assembly in adjusted position.