baber/WOPTO huggingface dataset:
Patent GB-1201777-A (GB)
Title: Purification of polymers produced by peroxide-catalysed reactions
Inventor: WEICHSELBAUM THEODORE EDWIN
IPC: C08J3/09
Filed: 1967-10-25
Abstract: 1,201,777. Purifying peroxide-catalysed polymerization products. BRUNSWICK CORP. 25 Oct., 1967 [27 Oct., 1966],. No. 48541/67. Heading C3P. Trace amounts of free acid, oxidizing agent and/or reducing agent in thermoplastic polymers, prepared by a peroxide-catalysed polymerization reaction, are removed or deactivated by melting the polymer and adding to the melt from 0À01-1À0% (by weight of the polymer) of an oxide of a metal of group IA, IIA. IIIA, IVA, or VA of the Periodic Table (as defined in the Specification). The melt thus treated can be dissolved in an aromatic hydrocarbon solvent and, if desired, the metal oxide can be separated off. Oxides which can be used include those of Pb, Cu, Bi and Sn, lead oxide (litharge) being preferred. Polymers which can be treated include polyolefins (including diene polymers), polymers of vinyl aromatic compounds, polyallyl alcohol, polymers of halo-olefins, polyvinyl acetate, polyacrylates and polymethacrylates, the polymers having been prepared using a peroxide catalyst such as benzoyl peroxide, dicumyl peroxide, cumene hydroperoxide, hydrogen peroxide, t-butyl hydroperoxide, methyl ethyl ketone peroxide, peracetic acid, t-butyl perbenzoate and potassium persulphate. Solutions of thus purified thermoplastic acrylic polymers in aromatic hydrocarbon solvents (e.g. toluene) are useful as adhesive compositions for mounting biological specimens on surfaces such as glass. The acrylic polymer may be poly-n-butyl methacrylate or a copolymer of n-butyl methacrylate with isobutyl methacrylate, methyl methacrylate, ethyl acrylate or methyl chloroacrylate.
Patent GB-1507617-A (GB)
Title: Driver circuit for electro-optical display device
IPC: G04G9/00
Filed: 1976-11-22
Abstract: 1507617 Alphanumeric display and circuits therefor CITIZEN WATCH CO Ltd 22 Nov 1976 [1 Dec 1975] 48549/76 Heading G5C [Also in Divisions G2 and G3] In a multi-segment electro-optical, e.g. electrochromic display as Fig. 1 (not shown), e.g. in a timepiece, a consistent state is ensured by short circuiting each segment before it changes state. Segment 46a, one out of n in an electrochromic cell 46, facing common electrode 46<SP>1</SP> at potential V 0 , is switched briefly to V- or V+ to cause respectively colour or bleach conditions: degradation occurs in each state, corrected by regenerating pulses of the same polarity. A pulse A (Fig. 6, not shown) to the control electrode of switch 32, e.g. an N- channel MOSFET, causes colour, and a pulse B to switch 34, e.g. a P-channel MOSFET drain to drain with 32, the drains feeding segment 46a, causes bleach. A pulse C to switch 36, e.g. a further MOSFET, shorts segment 46a to the common electrode 46<SP>1</SP> at V 0 . Logic circuit 40 generates binary data signals decoded 42 into 1 or 0 logic signals X to each segment according to the state-colour or bleach required, and also generates clock squarewave train # 2 , half frequency clock # 1  edge-synchronized with # 1 , and a squarewave # 3  frequency divided from # 2  to control regeneration. Latch circuits 48 and 52 followed by respective exclusive OR gate 50, 54 produce a pulse E or Z lasting one # 1  pulse on change respectively of the level of X or of regeneration signal # 3 . X or its inverse via 60 pass gates A or B provided that gate 66 has been opened by a # 2  pulse. During the delay before the next # 2  pulse the E signal closes shorting switch 36 by a pulse C. Regeneration pulses Z can during a # 2  pulse pass gate 66 and either gate 62 or 64 according to the level of X, so repeating the last signal A or B without causing a short circuit.
Patent GB-1283357-A (GB)
Title: Improvements in or relating to measurement of length magnetically
Inventor: RAE JOSEPH BRIAN
IPC: A01K73/06
Filed: 1968-10-14
Abstract: 1283357 Measuring length UNITED KING- DOM ATOMIC ENERGY AUTHORITY 1 Oct 1969 14 Oct 1968] 48682/68 Heading G4H To measure the length of a moving magnetizable cable 11 (Fig. 1), a start pulse 14 results in the cable being initially magnetically marked by a write head 12, this mark being detected by a read head 13 as a substantial change in the rate of change of flux intensity with respect to length and resulting in the cable being re-marked. The marks sensed by the head 12 are counted, an audio indication of each mark also being given. Preferably the write head comprises coils wound on two opposed E-shaped yokes of laminated silicon iron. The write pulse, produced on receipt of a start or read pulse, renders conductive a silicon controlled rectifier to discharge a capacitor through the write coils. The read head 13 comprises a coil wound in the shape of the periphery of a saddle the output from which, which is equivalent to the subtracted outputs of two adjacent coils around the cable, is fed via an amplifier 35 to a zero crossing detector 36 the pulses from which control the counter 18 and write pulse generator 16. An erase head 22 closes the cable before it passes the write head. The apparatus may be used for ensuring that the length of two steel trawl warps paid out by a trawler are the same.
Patent GB-986960-A (GB)
Title: Unitary packaging for baking trays and the like
Inventor: NEWCOMB BRIAN ERNEST
IPC: B65D57/00
Filed: 1963-12-11
Abstract: 986,960. Packages. BOWATER RESEARCH & DEVELOPMENT CO. Ltd. Dec. 11, 1963, No. 48923/63. Heading B8C. A package comprises a stack of tray assemblies 3a-3e nested within each other with the bases spaced apart by rigid members 7a-7d, each tray assembly comprising individual trays nested closely within each other and an outer tubular cylindrical shell 1 of bendable material enclosing the stack. The spacer members are of zig-zag cross-section and stand upright parallel to the axis of the outer tube. A further spacer member placed on top of the top tray assembly protrudes beyond the tube 1 and comprises two members 8, 10, with a disc 9 between. The wall of the tubular shell 1 may be secured to enable the shell to take up the shape of the tray assemblies.
Patent GB-1125637-A (GB)
Title: Protection of propylene polymer fibers from deterioration by light
IPC: C08K5/57
Filed: 1966-11-01
Abstract: 1,125,637. Polymer compositions. ARGUS CHEMICAL CORP. 1 Nov., 1966 [26 Nov., 1965], No. 48979/66. Headings C3B and C3P. [Also in Division D1] Compositions for coating propylene polymer fibres to shield the fibres from light tending to produce deterioration, comprise a 2-hydroxybenzophenone and an oxidized polymeric wax of molecular weight above 750 in amount sufficient to enhance the light-absorbing protection afforded by the benzophenone and to improve adherence of the benzophenone to the fibres. Preferably, the compositions comprise an epoxidized fatty acid ester. The wax may be an oxidized polyethylene, polypropylene, polybutene, Fischer-Tropsch or microcrystalline wax. The compositions may also comprise cross-linking agents, e.g. aldehydes, acetals, amine/aldehyde resins, phenol/aldehyde resins, epoxy resins, tris-(aziridinyl) phosphine oxide and tetra-(hydroxymethyl) phosphonium chloride; and may be applied from solutions or aqueous emulsions which may be formed with the aid of non-ionic, anionic or cationic emulsifying agents. Conventional oil repellants, lubricants, stabilizers, flame-proofing agents, shrink-proofing agents, brightening agents, mildew-proofing agents, softening agents, dyes and pigments may also be present. Extensive lists of materials are given and examples describe coating compositions comprising (1) aqueous emulsions of oxidized polyethylene wax, 2 - hydroxy - 4 - decyloxybenzophenone, polyoxyethylene sorbitan palmitate, sorbitan monooleate and borax, together with (2-5) epoxidized soya bean oil.
Patent GB-1526488-A (GB)
Title: Case for a stack of paper sheets
IPC: B42F7/14
Filed: 1976-11-25
Abstract: 1526488 Sheet dispensers S A R L IMPRIMERIE OBERTHUR 25 Nov 1976 [25 Nov 1975] 49186/76 Heading B8P A case 1 from which sheets may be pulled from a pad includes an aperture 11 bounded by an outwardly turned edge 12 fixed to a closure plate 2 and a window 14 through which the sheets may be pulled. The case 1 is preferably of moulded plastics material and the plate 2 may be of cardboard or plastics attached by an adhesive or heat welding. A spiral spring 3 is provided to bias the pad towards the window and the pad may take the form of a block calendar.
Patent GB-1394317-A (GB)
Title: Plastic pipe thrust resistant joint
IPC: B29C57/06
Filed: 1973-10-24
Abstract: 1394317 Grooving pipes JOHNS-MANVILLE CORP 24 Oct 1973 [27 Oct 1972(2)] 49520/73 Heading B5A [Also in Division F2] A self-locking screwed pipe coupling (see Division F2) may be made by moulding. As shown, a p.v.c. pipe 160 is heated to a deformable state and placed on a mandrel 122, having retractable helical ribs 124 in their retracted position. As the ribs are extended radially outwardly against the inner wall of the pipe, flexible diaphragm 146 is filled with water from a supply 148. The pressure of the diaphragm results in sharply defined grooves being moulded in the inner pipe wall. To enable the pipe to be removed from the mandrel, both the ribs and the diaphragm must be retracted.
Patent GB-1075190-A (GB)
Title: Railway sleeper bracket and sleeper
IPC: E01B9/30
Filed: 1965-11-24
Abstract: 1,075,190. Rail fastening means. ELASTIC RAIL SPIKE CO. (PROPIETARY) Ltd. Nov. 24, 1965 [Nov. 25, 1964; Sept. 30, 1965], No. 49877/65. Heading E1G. A bracket 10, acting with a clip to retain a rail 24 to a sleeper 14, has at least one limb 28 embedded in the sleeper, a projecting portion 32 forming a recess 34 in conjunction with the upper surface of the sleeper to receive one limb of the rail clip and a shoulder 36 to support another limb of the clip. The bracket may have a second limb 26 embedded in a stressed concrete sleeper and two brackets may be joined integrally by a section 29. The bracket is shaped from flat metal and may be protected from corrosion.
Patent GB-1292455-A (GB)
Title: Ester derivatives of oxazolidines and oxazines
IPC: C07D263/04
Filed: 1969-10-10
Abstract: 1292455 Unsaturated oxazine and oxazolidine polymers ROHM & HASS CO 10 Oct 1969 [18 Oct 1968] 49932/69 Heading C3P [Also in Division C2] Compounds of the formula where n is an integer of at least two, Z is a C 2-3  alkenylene radical, A is (the left valence being connected to Z), X is the radical where m is 2, 3 or 4 and R<SP>5</SP> and R<SP>6</SP> are H or C 1-6  alkyl or a mixture thereof; R<SP>1</SP> and R<SP>2</SP> are either (1) the same or different and (a) hydrogen, phenyl, benzyl and C 1-12  alkyl groups in the case of R<SP>1</SP> and (b) hydrogen and C 1-4  alkyl groups in the case of R<SP>2</SP> or (2) joined together to form a single pentamethylene, tetramethy: lene or C 1-2  alkyl-substituted pentamethylene or tetramethylene group which together with the carbon atom to which the single group is attached forms a carbocyclic group, Y is the radical where m<SP>1</SP> is 2 or 3 and R<SP>3</SP> and R<SP>4</SP> are hydrogen, C 1-12  alkyl, aryl or alkaryl are hydrolysed in aqueous media in the presence of an acid to a secondary amine or complex thereof with ketone or aldehyde which forms a salt of the acid present and which carries a hydroxyalkyl group on the nitrogen atom. This salt is polymerizable in aqueous systems using catalysts such as ammonium persulphate optionally with a reducing agent such as potassium metabisulphite in a redox system. The addition polymers and copolymers of compounds of Formula I may be prepared by bulk, solvent or aqueous emulsion techniques using organic solvent such as acetone, dioxane, dimethylformamide and acetonitrile and azo catalysts such as diazodiisobutyronitrile and dimethylalpha,alpha<SP>1</SP>- azodiisobutyrate.
Patent GB-992836-A (GB)
Title: Latex recycling process and apparatus therefor
Inventor: LEFEVRE LLOYD EDWARD
IPC: B29B17/00
Filed: 1963-12-18
Abstract: <PICT:0992836/C3/1> The surface of a bath containing a latex is continuously renewed by process which comprises continuously metering in the latex through a surge and settling chamber "A" and then in continuous non-turbulent planar flow into the bottom-most portion of the bath at a rate in excess of that at which the latex is removed from the bath by the fabricating technique employed.  In the preferred embodiment of the bath the latex flows over weir 25 under baffle 26 into the bath 20 then the excess flows over weir 27-preferably of the same height as weir 25-into outlet 24 preparatory to being mixed with fresh latex and recycled.
Patent GB-1398024-A (GB)
Title: Corona discharge device
IPC: H05F3/04
Filed: 1972-10-31
Abstract: 1398024 Corona charging device INTERNATIONAL BUSINESS MACHINES CORP 31 Oct 1972 [3 Dec 1971] 50054/72 Heading G2H [Also in Division H1] A corona discharge device for charging a photoconductive surface in an electrostatic copying machine, comprises corona wires 21 suspended from insulating mounting blocks 30 the inner faces of which are formed with a groove 34 and a lip 36 so that the interior of the groove is shielded from the discharge thereby preventing breakdown of the insulation between the corona wires and adjacent metal parts of the device. A control grid composed of wires 51 is provided over the open end of the device.
Patent GB-1482759-A (GB)
Title: Multi-stripe continuous coating apparatus
IPC: B05C9/06
Filed: 1974-11-20
Abstract: 1482759 Coating apparatus BURROUGHS CORP 20 Nov 1974 [19 Dec 1973] 50209/74 Heading B2L [Also in Division Dl] Multi-stripe continuous coating head apparatus comprises a number of alternate blocks 12 and separators arranged side-by-side adjacent a movable pressure back-up member 60 of a device for feeding a sheet or web 46, each block having an internal cavity 22 opening outwardly and adjacent which a dam member 36 with a radiussed edge is adjustably mounted to define a slot for coating material, the separators being disposed between and flush with the bottom of each pair of adjacent blocks 12 to provide a wet seal between adjacent coating slots and the spring biassed backing plate 60 for an article or web 46 to be coated. The backing plate 60 is pivotted to a frame or table 64 for cleaning.
Patent GB-1093349-A (GB)
Title: Production of styrene/acrylonitrile copolymers using a redox catalyst system
Inventor: FISLER TEODOR MOREL
IPC: C08F4/30
Filed: 1965-11-26
Abstract: Styrene and acrylonitrile are copolymerized in aqueous emulsion using a redox catalyst comprising potassium persulphate as promoter and oxidizing agent, potassium ferricyanide as activator and in which the acrylonitrile acts as a reducing agent.  The copolymerization may be carried out in the presence of the sodium soap of C10- 20 fatty acids as emulsifier and the pH of the reaction mixture may be maintained at 11-14 using sodium hydroxide.
Patent GB-1413284-A (GB)
Title: Security communication devices
IPC: E06B7/30
Filed: 1971-11-01
Abstract: 1413284 Security communication device J DOUGAL 31 Oct 1972 [1 Nov 1971] 50664/ 71 Heading E1J A security communication device for fitting into a bullet-proof glass pane 3 comprises an elongate tubular casing 4 housing a plurality of corrugated sheets 12 defining a passage which permits verbal communication whilst preventing the direct transmission of a projectile or protected fluid. The casing has slots 10 at opposite ends interconnected by the sheets 12. A pivoted or slidable hatch 8 may be provided. The plates 12 may be saw-toothed and may be formed in a separate member inserted into the casing 4.
Patent GB-1277400-A (GB)
Title: Polyethylene compositions
IPC: C08F10/00
Filed: 1970-10-26
Abstract: 1277400 Polyethylene compositions WACKER-CHEMIE GmbH 26 Oct 1970 [29 Oct 1969] 50673/70 Heading C3P Moulding compositions comprise 90 to 99 weight per cent of low pressure polyethylene of specific gravity 0À940 to 0À965 and grader value 0À05 to 0À3 and 10 to 1 weight per cent of high pressure polyethylene of specific gravity 0À918 to 0À930 and grader value 0À05 to 0À3. The low pressure polyethylene may be prepared using a catalyst formed from titanium tetrachloride and a silane, optionally with aluminium chloride, and preferably has a broad molecular weight distribution, particularly a non-uniformity factor of 9 to 30. The compositions may also comprise processing assistants, e.g. fatty acid amides and aluminium, calcium and lithium stearates; and stabilizers, e.g. hindered phenols, thioethers, phosphites and carbon black; and may be moulded into films which may be biaxially stretched.
Patent GB-986513-A (GB)
Title: Improvements in and relating to electric discharge tubes
IPC: H01J19/40
Filed: 1963-12-24
Abstract: 986,513. Thermionic valves. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Dec. 24, 1963 [Dec. 27, 1962], No. 50949/63. Heading H1D. An electric discharge tube for amplifying electrical oscillations comprises a cathode 1, a grid 2 and an anode consisting of two halves 4 each having a re-entrant part 3 which is orientated towards the cathode and which has substantially the same width as the cathode, which re-entrant parts constitute the active anode surface, and screens 6 arranged on both sides between anode parts 4 and grid 2, the free edges 7 of screens 6 being located between the edges of the active anode parts 3 and the active grid surface, the screens consisting of four strips 6 and the position of the active edges 7 of the screens being determined by apertures in insulating centring members. Two screens 6 on the same side of cathode 1 may be integral with a strip shaped connecting conductor which may at the same time serve as a screen between the current supply conductors of the grid and anode. Plates 5 operate as cooling vanes and the parts are housed in glass ball 8. Anode parts 4 are connected with each other by strips 9. The centring members are of mica. Specification 909,917 is referred to.
Patent GB-1214395-A (GB)
Title: A method of preparing polypropylene sheet
IPC: B29C48/08
Filed: 1968-10-28
Abstract: 1,214,395. Making polypropylene films and sheets. MITSUBISHI PETROCHEMICAL CO. Ltd. 28 Oct., 1968 [27 Oct., 1967], No. 50965/68. Heading B5B. Polypropylene films and sheets are made by melt extruding a crystallizable substantially isotactic polypropylene through a slot die to form a flat molten sheet at least one surface of which is caused to pass over and in contact with a quenching roller, the temperature of the peripheral surface of the roller and the period of contact of any point on the surface of the sheet with the roller being such that the surface of the sheet is cooled to a temperature below the melting point of the polymer while the inner portion of the sheet remains in the molten state. Both surfaces of the sheet are then contacted with quenching water (as by passing through a bath of quenching water) maintained at a temperature not exceeding 40 C. Prior to being contacted with the quenching roll the film, after leaving the quenching roll, may be passed over a second quenching roll in such a manner that the other surface of the film is also cooled to below the melting point of the polymer, the inner portion of the film still remaining in a molten state. The molten polypropylene sheet may have a thickness exceeding 0À5 mm., e.g. 1À5 mm. In the examples, a sheet having a thickness of 1À5 mm made according to the process of the invention, may be biaxially stretched at a stretch ratio of 5 in the longitudinal and 7 in the transverse direction to obtain a biaxially stretched film having a thickness of 35 microns. The period of contact of the molten polypropylene sheet with the quenching roller may be in accordance with the expression:- in which:- # = the contact time in seconds; L = the thickness of the sheet in cm.; t 0  = the temperature of the molten polymer in C.; t, = the surface temperature of the quenching roller in C. Quenching water may be ejected from nozzles on to both surfaces of the sheet while it is passed through the quenching bath.
Patent GB-694090-A (GB)
Title: Improvements in or relating to motor vehicle front wheel independent suspension assemblies
IPC: B60G7/00
Filed: 1952-02-27
Abstract: 694,090. Spring suspensions. O'CONNELL, W. Feb. 27, 1952 [June 4, 1951], No. 5153/52. Class 108 (ii). [Also in Group XXXI] In a swivel pin adapted for use in a motor vehicle front wheel independent suspension of the type in which springing is effected by means of longitudinal torsion bars acting on a lower suspension arm and is combined with direct action rack and pinion steering gear, the swivel pin having pivoted to an extension at the top thereof, a top link-housing adapted for the journalling therein of the pivot pin of a shock absorber arm, the pivotal connection of the top link-housing to the extension of the swivel pin is effected through the intermediary of a pair of taper roller bearings incorporating adjusting means for taking up the wear therein. In the arrangement shown, in which a swivel pin 16 is provided with an extension 11, a housing 12 of the swivel pin top suspension link assembly is formed with recesses 3 and 4 accommodating taper roller bearings 1 and 2 which work on the swivel pin extension 11. The housing is secured by a castellated nut 7 which is adjustable to compensate for wear in the bearings and which may be locked by a split pin 8. The lower end of the housing is closed by an oil seal 6 against a collar 11<1> on the swivel pin. A side extension 12<1> of the housing 12 houses composition banded cone bushes 9 for a pivot pin 10 of a shock absorber arm 15. The pivot pin is locked by a castallated nut against one of the cone bushes. Lubricant is admitted through a nipple 23 to the bearings 1 and 2 and is conducted to the lower swivel pin suspension link connection through a pipe 13. The housing 12 is closed by a cap 5. The swivel pin is formed with a taper bearing 17 for the link of the steering gear and with a bottom bearing 19 for a stub axle.
Patent GB-1482432-A (GB)
Title: Frequency stabilised lasers
IPC: H01S3/139
Filed: 1974-11-28
Abstract: 1482432 Lasers STANDARD TELEPHONES & CABLES Ltd 28 Nov 1974 51573/74 Heading H1C To frequency stabilize the output of a laser having a temperature sensitive multilayer interference laser cavity reflector 51, the temperature of the reflector is modulated by directing amplitude modulated radiation on to it, the resulting modulation of the laser output is monitored to provide a signal whose amplitude and phase depend upon the departure from optimum of the reflector temperature, and the signal is employed in a servo loop to control the mean intensity of radiation directed upon the reflector. As shown the multilayer reflector 51 of a CO 2  laser receives radiation from a modulated source 56, which may be a Nd, YAG or GaAs laser and which also provides a phase reference signal to a phase comparator 58. If the mean temperature of the reflector is at an optimum value T 1  ,Fig. 2 (not shown) for reflection of a desired frequency mode the output from a photocell 55, Fig. 3b (not shown), will be in phase with the reference signal, Fig. 3a (not shown). Hence there will be no output from comparator 58, and the radiation intensity from source 56 is unchanged. However, if the mean reflector temperature is above or below the optimum the resulting photocell output, Figs. 3c, 3d (not shown), will be out of phase with the reference signal. Hence an intensity correction signal is supplied to the source 56. The beam from source 56 may be directed at the reflector along the same path as the main laser beam, Fig. 6 (not shown). Alternatively reflector 50 may be partially transmitting so that the output from the laser 52 is monitored after it has passed through reflector 50, Fig. 7 (not shown).