baber/WOPTO huggingface dataset:
Patent GB-930705-A (GB)
Title: Traffic control signal assembly
Inventor: QUILLIAM BARRY
IPC: G08G1/005
Filed: 1961-11-10
Abstract: 930,705. Pedestrian-crossing lighting arrangements. FOREST CITY SIGNS Ltd. March 23, 1962 [Nov. 10, 1961], No. 40306/61. Class 118. A pedestrian-controlled crossing signalling arrangement comprises vehicle warning lights VA1-VA3, vehicle stopping lights VR1-VR3 and pedestrian " cross " and " wait " lights PC, PW the arrangement including means for both pulsating (dim and bright) and flashing (on and off) the vehicle warning lights at high and low frequencies and for flashing the pedestrian " cross " light to warn pedestrians and traffic that the lights are about to change. The signalling phases are switched sequentially by stepping switches US1-US6 controlled via a relay US by a timing circuit including a thyratron V in the circuit of a relay X the contacts X1 X2 of which lie in the switch circuits. Operation. Position 1 of stepping switches corresponds to the period when vehicles have precedence, no lamps are illuminated, except on closure of switch P the " wait " light PW. Assuming switch P has been closed: Position 2 is still a " wait " period during which lamp PW is operative. Position 3.-The contact arm of US1 completes a circuit to motor driven flasher unit M having high- and low-frequency flashing contacts Mf, Mff respectively in the circuit of relay F. Contact Mf makes and breaks the circuit causing warning lamps VA1-VA3 to pulsate at higher frequency via contacts F2-F4 due to the positions of contacts D3-D5 and B1-B5 to warn traffic that it must stop if possible. The " wait " lamp PW is still illuminated. Position 4.-" Wait " lamp PW and warning lamps VA1-VA3 are extinguished and " cross " lamp PC lit via contact D2 due to de-energization of relay D. The vehicle stop lamps VR1- VR3 now pulsate at the higher frequency due to the return of contacts D2, D4' D5 to the positions shown. Pedestrians can now cross and traffic has to stop. Position 5.-Only relay F is energized at the lower frequency through contact Mff causing flashing of pedestrian cross lamp PC and of warning lamps VA1-VA3 via contacts B3-B5 and dimming resistance R. Position 6.-Warning lamps VA1-VA and lamp PC flash at the higher frequency to warn pedestrians and traffic that the traffic crossing period will soon start. Another timing device e.g. an electric, constant-speed motor may replace the one described and an electronic device, mercury switch delay device or " slugged " relay may replace the motor M. Pedestrian demand in position 1 is stored by the provision of a link N, the latter being removed if storage is not desired.
Patent GB-1477583-A (GB)
Title: Plasma panel display device
IPC: H01J17/49
Filed: 1975-10-02
Abstract: 1477583 Treating glass spheres RAYTHEON CO 2 Oct 1975 [25 Oct 1974] 40366/75 Heading C1M [Also in Division H1] Hollow, transparent, glass spheres or spheroids for use in a plasma panel display device, see Division H1, are filled with a plasma forming gas by heating to a temperature sufficient to open pores in the glass, e.g. 400-1500‹ F., forming a vacuum around the spheres which also removes all the gas from inside the spheres, and then introducing a plasma forming gas, such as Hg, Ne or mixtures of Hg with Ar and/or Ne, at a pressure of 140 mm Hg. By lowering the temperature to room temperature the pores close to seal the gas inside the spheres. The spheres may have an outer diameter of 10-200 microns with a wall thickness of 2 microns, and they may be flattened.
Patent GB-1446263-A (GB)
Title: Processing of natural phosphates
IPC: C01B7/19
Filed: 1974-09-18
Abstract: 1446263 Processing phosphates INST TEPLO I MASSOOBMENA AKAD NAUK BELORUS SSR and BELORUS TEKHNOL INST IM KIROVA 18 Sept 1974 40652/74 Heading C1A Naturally occurring phosphate ores, such as beneficiated or non-beneficiated ores comprising phosphoric anhydride in the form of phosphates and fluorine as calcium fluoride and which have a particle size of not more than 1 mm., are heated in the presence of water vapour by a plasma stream of working gas, e.g. argon, nitrogen or air, which has a temperature of at least 2500‹ K., to a temperature sufficient to evolve fluorine from the phosphate and form hydrogen fluoride, the plasma stream being cooled to not less than 1500‹ K.; hydrogen fluoride is separated from the defluorinated phosphate and the latter decomposed to yield one or more phosphorus oxide(s) and calcium oxide by heating with an air plasma stream having a bulk temperature of at least 3500‹ K. and containing nitrogen oxides; the air plasma stream containing nitrogen oxides, phosphorus oxide(s) and calcium oxide is cooled to a bulk temperature at which phosphorus oxide(s) react(s) with calcium oxide, but which is above the condensation temperature of the phosphorus oxide(s) to form calcium polyphosphates, e.g. Ca n P n O 3n+1  and/or Ca n P 2n O 6n  or calcium acid phosphates of the type and the nitrogen oxides is absorbed from the stream by contacting with dilute acid or water to form nitric acid. Alternatively, the air plasma stream is cooled to a bulk temperature above the range at which calcium oxide reacts with phosphorus oxide(s), the calcium oxide is recovered and then the calcium oxide free gas stream is cooled to condense and recover the phosphorus oxide(s) and then the nitrogen oxides are recovered as nitric acid in the manner described above.
Patent GB-1023465-A (GB)
Title: Method of impregnating wood
IPC: B27K3/15
Filed: 1963-10-15
Abstract: Distortion of pine or spruce wood is prevented by impregnation with 0.5-50% of an alkylene oxide in gaseous, liquid or dissolved form and causing polymerisation of the alkylene oxide within the wood.  The alkylene oxide may be ethylene, propylene or butylene oxide.  The temperature of treatment may be 0-160 DEG C.  Air may first be removed from the wood under reduced pressure and the alkylene oxide then applied at a pressure of 1-200 atmospheres. The time of treatment may be 0.5-20 hrs.  The wood may contain up to 12% of water.  The wood may first be treated with a substance which reacts with an alkylene oxide, e.g. a saturated aliphatic mono- or polyhydric alcohol containing up to 10 carbon atoms and monoethers thereof; saturated aliphatic carboxylic acids containing up to 10 carbon atoms; ammonia; or a primary, secondary or tertiary amine containing up to 10 carbon atoms.  A catalyst may be supplied to the wood together with or after the alkylene oxide.  The catalyst may be a liquid, e.g. aqueous sodium hydroxide solution, or a gas or vapour, e.g. boron trifluoride, ammonia, monoethylamine, dimethylamine, trimethylamine, triethylamine, pyridine, piperidine, or morpholine. Volatile material may be removed from the treated wood under vacuum. Elevated pressure may then be employed to distribute more uniformly the alkylene oxide reaction products.
Patent GB-959872-A (GB)
Title: Hydraulic circuit for a tractor drawn implement
IPC: E02F3/627
Filed: 1962-10-29
Abstract: 959,872. Earth-moving equipment. CATERPILLAR TRACTOR CO. Oct. 29, 1962 [Nov. 24, 1961], No. 40735/62. Heading E1F. [Also in Division F1] Valve means 68, 86 are so associated with a load-sustaining jack 16, preferably incorporated in a bowl type scraper, that may be subjected to sudden load pressures that when no relative movement is occurring between the piston and cylinder of the jack the valve means isolates the jack from the flexible conduits by which the jack is supplied with fluid under pressure to cause actuation of the jack.
Patent GB-1472697-A (GB)
Title: Electric control system for magnetic sheet recording and repro ducing apparatus
IPC: G11B21/04
Filed: 1975-10-07
Abstract: 1472697 Magnetic recording/playback of stationary sheet record GAKKEN CO Ltd 7 Oct 1975 [8 March 1975] 40970/75 Heading G5R In an arrangement for recording or reproducing audio information from a stationary magnetic sheet record 35 using a magnetic head 24 movable in a slot 23 in turntable 12, the turntable drive motor 48 is energized and deenergized by switches acting via a self holding relay.  The apparatus is switched to record or playback by switches S1-a, S1-b, and S1-1 to S1-3 and is further controlled by switches S2- S7 which are spring biased to return to their shown positions. On operating play switch S3, relay L is energized and held via its contact RS1 and transistor T. Motor winding 48 is energized via relay contact RS2 and contacts RS3, RS4 control the polarity of the supply to a Hall device 49 which in turn controls the direction of motor rotation. The motor speed is controlled by circuit 50. During recording the transistor T is biased to conduction by resistors R 1 , R 2  but during play back a circuit 45 which normally biases the transistor on can respond to stop signals at a particular frequency recorded on the record to cut off the transistor thus opening the hold circuit to release the relay and stop the motor. The relay hold circuit can also be opened by stop switch 54 and by a completion switch 57 which is opened during return of the magnetic head to its start position. After stopping the drive the motor can be driven in reverse to back space the head by operating switch S5 whereby the motor winding 48 is energized whilst the relay is de-energized so that the direction of the supply to the Hall device is reversed. A switch S6 is ganged to switch S5 to mute the play back circuit during this period of reverse drive.
Patent GB-1528929-A (GB)
Title: Louvred echelon lens
IPC: G02B5/04
Filed: 1975-10-07
Abstract: 1528929 Internally louvered echelon lenses MINNESOTA MINING & MFG CO 7 Oct 1975 41098/75 Heading G2J An echelon lens has at least one surface 15, Fig. 1, configured as a linear array of echelons, and has within its thickness a plurality of internal light blocking louvres 13 separated by transparent portions 12, the arrangement of the louvres being such as to allow light to pass through the lens from one side to the other, but to absorb scattered and reflected light which would otherwise degrade the contrast, and the angle between the direction of the louvres and the echelons being chosen to reduce moire fringes. The louvered layer is preferably skived from a block composed of alternate transparent and opaque layers and is subsequently laminated between transparent facing layers, e.g. 14, Fig. 1, one of which may be the configured layer 15. Alternatively the configured layer may be attached at a plurality of periodically spaced points (e.g. by adhesive as per Fig. 4, (not shown); or by engagement of studs with sockets in the louvered layer, as per Fig. 3, (not shown). The moire fringes may be eliminated by having the louvres and echelons exactly parallel, or by ensuring a sufficiently large angle therebetween (e.g. more than 10 degrees). The louvres (as seen in a lens cross section) may be arranged so as to 'fan out' to allow light required for refraction to pass through the echelons. In one form, the louvred layer has a configured surface on either side, with the respective linear echelons being arranged at right angles. Such a lens can achieve a point focus (as opposed to a line focus for a single linear echelon). Specification 1253237 is referred to.
Patent GB-1268416-A (GB)
Title: Self-locking bolt and manufacture thereof
Inventor: STOVER JORDAN HOMER III
IPC: F16B39/284
Filed: 1969-08-18
Abstract: 1,268,416. Rolling threads. J. H. STOVER III. 18 Aug., 1969 [24 Oct., 1968], No. 41176/69. Heading B3M. [Also in Division F2] A self-locking bolt, stud or set screw is formed by rolling an unthreaded blank having a bore in its leading end between a pair of dies 12, 13 (Fig. 1) opposed parts of the thread on the blank being indented to provide a portion of the blank with an elliptical cross-section. The blank is indented by inserts 20 and 21 carried in the dies, each insert being held in a cylindrical bore by a screw 23. The threading grooves on each insert, Fig. 9, protrude outwardly to deform the blank in the region of a central bore provided in the end of the blank. The main threading grooves of each die are relieved in the region 12d following the insert. The bore in the blank has a length of 1D and a diameter of 0À35 to 0À5 D, where D is the outer diameter of the rolled thread. The diameter of the major axis of the elliptical cross-section is about 1À03 D.
Patent GB-940419-A (GB)
Title: Improvements in resinous polycarbonate compositions
IPC: C08G64/18
Filed: 1959-12-07
Abstract: 940,419. Polycarbonate compositions. GENERAL ELECTRIC CO. Dec. 7, 1959 [Jan. 2, 1959], No. 41512/59. Heading C3R. Polycarbonates based on dihydric phenols have their physical and chemical properties improved by mixing them with 0À1-20% by weight of an organopolysiloxane. The polycarbonate is preferably based on a bis-phenol in which the two aromatic nuclii are separated by one or more radicals selected from alkylene, alkylidene, polyoxyalkylene, aromatic, tertiary amine, ether, carbonyl, organo-silicon, sulphur-containing, and glycol-dibasic acid ester radicals. The polysiloxane may contain up to three organic radicals per silicon atom, the preferred polymers being liquids or gums containing 1À95-2À25 organic radicals per silicon atom. Mixing of the polycarbonate and the polysiloxane may be effected with the substances in solid, melt or solution from (e.g. in methylene chloride, chloroform, cyclohexanone or dioxane). Alternatively, the polycarbonate may be added to the polycarbonate-forming reaction mixture. Fillers e.g. woodflour, diatomaceous earth, silicon or carbon black may be added. In the example, the polycarbonate of bisphenol-A was mixed with a dimethyl polysiloxane fluid chain, stopped with trimethylsilyl   groups. Uses-films, fibres, moulded objects, surface coverings, coating compositions, electrical insulation material. Specifications 772,627 and 870,095 are referred to.
Patent GB-1436756-A (GB)
Title: Liquid crystal composition
IPC: C09K19/22
Filed: 1973-09-04
Abstract: 1436756 Liquid crystal compositions DAINIPPON INK & CHEMICALS Inc DAINIPPON INK INSTITUTE OF CHEMICAL RESEARCH and SHARP CORP 4 Sept 1973 [5 Sept 1972] 41564/73 Heading C4X An additive for improving the dynamic scattering properties of an electro-optic nematic liquid crystal material is a quaternary ammonium hydroxide or the quaternary ammonium salt of a carboxylic acid. The quaternary ammonium substituent groups, which may be aliphatic or aromatic preferably each contain 1-20 carbon atoms. At least one group preferably includes at least 3 carbon atoms. The carboxylic acid may be aliphatic or carbocyclic. If it is a diacid, only one acid group need be associated with an ammonium ion. The additive forms 0À001 to 0À5%, and preferably 0À003 to 0À1% by weight of the composition. Compared with an unmodified composition, the turn-on and turn-off times in response to an electric field, and the degree of turbidity produced, are improved. Alternating fields of higher frequencies are effective. The nematic material may be a single compound, or a mixture, e.g. of at least two p-alkoxybenzal-p<SP>1</SP>- butylanilines, including the methoxy compound, and wherein other alkoxy groups contain 2-12 carbon atoms. Two such quaternary mixtures are described, together with a mixture comprising four of the above compounds and anisylidene-p-aminophenyl acetate.
Patent GB-1045898-A (GB)
Title: Sealing ring
Inventor: REID WILLIAM PAUL
IPC: F16J15/32
Filed: 1964-10-12
Abstract: 1,045,898. Piston, joint-making and stuffing- box packing. AEROQUIP A.G. Oct. 12, 1964, No. 41621/64. Headings F2B and F2T. A sealing ring for use between relatively fixed or relatively movable parts comprises an annular flexible sealing jacket 1 of channel shape in cross-section reinforced by a helically coiled spring 2 mounted within the jacket and formed of flat ribbon-like strip of spring material whereby the coils present closely spaced wide surfaces in contact with the interior surface of the jacket. The outer surfaces of the side walls 1a of the jacket are formed with projections lc defining sealing edges 1d and the spring 2 is formed by two springs 2a and 2b coiled in opposite hand and mounted one within the other. The channel 3 may open axially, as shown in Fig. 2, or radially inward or radially outward as required so that in use it is exposed to the pressure of the fluid to be sealed. The jacket 1 may be of plastics material, e.g. polytetrafluoroethylene, and the springs 2c, 2b may be of beryllium copper or stainless steel. The sealing ring may be used as a piston packing, Fig. 4 (not shown), or as a pipe joint packing, Figs. 5 and 6 (not shown). In the application shown in Fig. 9 where the ring is used to form a seal between two members 15 and 16 and is exposed to extremely low temperatures, shrinkage of the ring causing the bottom wall 1b of the jacket to move away from the shoulder 15c of the member 15 is prevented by a rigid ring 14.
Patent GB-1468587-A (GB)
Title: Polymer-containing water-in-oil emulsions
IPC: C08F2/00
Filed: 1974-09-25
Abstract: 1468587 Paper manufacture CALGON CORP 25 Sept 1974 [1 Oct 1973 16 July 1974] 41719/74 Heading D2B [Also in Division C3] Water drainage is improved from a web obtained in the manufacture of paper by adding to a cellulosic pulp slurry an emulsion consisting of a polymer-containing water-inoil emulsion which has been made by polymerising water-soluble monomers in a waterin-oil emulsion containing at least 20% by wt. based on the wt. of the oil phase of the emulsion, of an emulsifier having an HLB (as defined) of at least 7, depositing the resulting mixture onto a forming surface and draining water from the mixture. The above emulsion can also be used to improve the retention of inorganic fillers in the processing of paper by adding it to 'an aqueous paper pulp suspension. Example 48 shows the use of the above emulsions as drainage aids and example 49 illustrates their use as pigment retention aids. In these Examples, emulsions containing polymers derived from acrylamide/dimethyl diallyl ammonium chloride, acrylamide/3-acrylamido-3-methyl butyl trimethyl ammonium chloride, and acrylamide /2 - acrylamido - 2 - methyl propyl sulphonic acid are used.
Patent GB-1446429-A (GB)
Title: Marine life-saving craft
IPC: B63C9/06
Filed: 1972-09-08
Abstract: 1446429 Lifeboat R J BOXALL 5 Oct 1973 [8 Sept 1972] 41895/72 Heading B7A A lifeboat is eight sided in horizontal crosssection. In the embodiment shown the outboard motor which powers the craft can be raised up when not in use.
Patent GB-1279714-A (GB)
Title: Heat shrinkable ethylene polymer film
Inventor: GOLIKE RALPH CROSBY
IPC: C08J3/28
Filed: 1969-08-22
Abstract: 1279714 Heat shrinkable ethylene polymer film E I DU PONT DE NEMOURS & CO 22 Aug 1969 [23 Aug 1968] 41943/69 Heading B5B [Also in Division C3] A heat-shrinkable, biaxially oriented, irradiated film of a blend of ethylene polymers comprises 70 to 85 weight per cent of low density (LD) (0À91 to 0À93g./c.c. at 25‹ C.) ethylene polymer or copolymer, and 30 to 15 weight per cent high density (HD) (0À94 to 0À98 g./c.c. at 25‹ C.) ethylene polymer or copolymer, the film being cross-linked and having a shrink tension of at least 14 kg./cm.<SP>2</SP> at 100‹ C. and having in each direction in the plane of the film a shrinkage of at least 15% at 100‹ C. and a zero strength temperature of at least 175‹ C. and preferably at least 200‹ C. Zero strength temperature is defined as the temperature at which a film sample fails at 5 seconds under a tensile load of 20 p.s.i. (1À4 kg./cm.<SP>2</SP>). The melt indices of the LD polyethylene and the HD polyethylene may be 1À5 to 8À0 and 0À4 to 1À5 respectively. When crosslinking is effected by ultra violet irradiation the polymer blend may include 0À05 to 1À0 weight per cent of a polymeric photosensitizer have a phenone moiety which may be an ethylene/methacryloxybenzophenone/ methylmethacrylateterpolymer. The process comprises forming the film of the polymer blend, stretching at a draw ratio of at least 5À1 in two mutually perpendicular directions in the plane of the film at 90 to 115‹ C., cooling the film while maintaining its dimensions and irradiating the film to crosslink sufficiently to raise the zero strength temperature to at least 175‹ C. The irradiation may be effected by a high energy ionising irradiation preferably of 0À5 to 6 megarads or, when the polymeric photosensitizer is in the polymer blend, by ultra violet irradiation of 2000 to 3000 Š for 1 to 30 seconds. The film so produced may be used in packaging where it has an increased temperature range for heat sealing and an improved zero strength temperature.
Patent GB-1020243-A (GB)
Title: Electric butt-welding machine for resistance-butt and flash-butt welding
IPC: B23K11/04
Filed: 1962-11-06
Abstract: 1,020,243. Welding by pressure. H. A. SCHLATTER A.G. Nov. 6, 1962 [Nov. 7, 1961], No. 41944/62. Heading B3R. An electric butt or flash-butt welding machine comprises two clamping heads, one being movable in the upsetting direction and being carried on guide bars which are secured to the other, stationary, clamping head to extend therefrom in cantilever fashion and are arranged symmetrically to the welding point a doubleacting piston being secured to the free end of each guide bar to be received in cylinders fixed to the movable clamping head. The fixed clamping head 1 has an upper jaw 11 actuated by an hydraulic cylinder 13 and a lower jaw 12 actuated by a hydraulic cylinder 14, the workpiece being adjustable in the manner described in Specification 817,166. The movable head 2 which has a fixed lower jaw 22 and an upper jaw 21 movable by an hydraulic cylinder 23 is supported by rings 31, 41 on guide bars 3, 4 attached to the head 1. The bars are horizontal and in end elevation are on a line drawn through the weld point. A piston 51 on the end of the bar 4 is in a cylinder 52 carried on the head 2 and hydraulic fluid is admitted to either side of the piston by pipes 551, 561. A device 6 attached to the piston 51 has a highpressure cylinder 62 connected to one side of the cylinder 52 through a passage 57 in the end of the bar 4 and a piston 65 in a low-pressure pneumatic cylinder 64, supplied by a pipe 641. A similar device is provided at the end of the bar 3. To feed the workpiece forward oil is supplied by pipe 551 and to apply upsetting force the pipe 551 is closed and air is supplied by pipe 641 to move piston rod 63 of the piston 65 to produce increased pressure on the piston 51.
Patent GB-844832-A (GB)
Title: Improvements in the working up of low pressure polyolefines
IPC: C08F6/02
Filed: 1958-12-30
Abstract: Crude low-pressure polyolefines e.g. polyethylene or polypropylene, are purified by first treating with an aqueous solution of a readily soluble salt of a strong base and a strong acid at 5 to 30 DEG C., separating the polyolefine, washing it with an aqueous salt solution, then treating the polyolefine with a 3 to 10% aqueous caustic alkali solution e.g. caustic soda solution and finally washing the polyolefine with water.  A small amount of a surface-active substance may be added to one or more of the treating liquids.  The aqueous salt solution may be treated e.g. heated to between 60 and 100 DEG C., to recover catalyst residues. The low pressure polyolefines are those obtained by polymerizing 1-olefines in the presence of a titanium compound and an organo-metallic compound such as an alkyl aluminium halide.  The salt of the strong base and strong acid may be sodium, potassium, ammonium, magnesium, calcium, or barium chloride, or sodium, ammonium, or magnesium sulphate.  The surface active substance may be an ethoxylated fatty alcohol or alkyl phenol, or an alkylaryl sulphonate.