baber/WOPTO huggingface dataset:
Patent GB-1134928-A (GB)
Title: Varactor diode
Inventor: FRANKS JOSEPH
IPC: H01L21/18
Filed: 1966-11-22
Abstract: 1,134,928. Semi-conductor devices. STANDARD TELEPHONES & CABLES Ltd. 16 Nov., 1967 [22 Nov., 1966], No. 52156/66. Heading H1K. A varactor diode comprises two adjacent regions 1, 3 of opposite conductivity type mounted on an insulating substrate (2, Fig. 1, not shown), one region being of higher resistivity than the other and the junction 4 between them being multiply indented from the region of higher resistivity into the region of lower resistivity. One region may surround the other, as shown, or they may be arranged sideby-side. Ohmic contacts (7, 8) are made to the regions, the contact on the higher resistivity region being spaced from the junction by a distance greater than the maximum excursion of the boundary 9 of the depletion layer. In one embodiment a semi-insulating gallium arsenide substrate is provided with an N-type layer by epitaxial deposition or conversion and a silica layer is formed on the N-type layer. Windows are made in the silica layer and a suitable impurity is diffused through the windows to form P-type regions in the N-type layer, a number of diodes being made simultaneously on a common substrate which is subsequently subdivided. Finally, the silica is removed from the parts of the N-type layer on which contacts are to be formed and ohmic contacts are made to all the regions, the remaining silica forming a passivating layer. In a modification, the regions are made of germanium or gallium phosphide. In an alternative embodiment silicon is epitaxially deposited on a sapphire substrate, and in a further alternative silicon dioxide is grown on a wafer of single crystal silicon and covered with a substrate of polycrystalline silicon. The single crystal wafer is then lapped and etched and provided with a region of opposite conductivity type.
Patent GB-1058470-A (GB)
Title: Improvements in electric rotating machines having a commutator
IPC: H02K13/04
Filed: 1964-12-23
Abstract: 1,058,470. Dynamo-electric machine commutator connections. SOC. D'ELECTRONIQUE ET D'AUTOMATISME, and YASKAWA ELECTRIC MANUFACTURING CO. Ltd. Dec. 23, 1964 [Dec. 28, 1963], No. 52320/64. Heading H2A. In an electric rotating machine rotor having a commutator associated with a cylindrical winding a comprising at least one layer of conductors extending along generants of the cylinder carrying them and having bare flat ends 3 at the commutator end, the commutator segments 4 and conductor ends 3 are contacted by a corresponding number of radial conductors 1 on an annular carrier 2 whose inner and outer edges are near the respective segments and conductor ends and up to or beyond which edges the conductors 1 are radially extended. The contact may be reinforced by soldering or welding, the extensions may be bent over at 5, 6, and the conductors 1 may be printed, stamped or chemically engraved. The carrier 2 is secured to or is part of a carrier 7 of the winding a which comprises flat bars in a solid resin.
Patent GB-1078469-A (GB)
Title: Process for the concentration of aqueous dispersions
IPC: C08L21/00
Filed: 1964-12-24
Abstract: 1,078,469. Concentrating aqueous dispersions of fluorine-containing polymers. FARBWERKE HOECHST A.G. Dec. 24, 1964 [Dec. 27, 1963], No. 52480/64. Heading BIB. Aqueous dispersions of fluorine-containing polymers, particularly polytetrafluoroethylene, are concentrated by adding a non-ionic or anionic dispersing agent and evaporating off the water content at a sub-atmospheric pressure, so that no gases can penetrate the dispersion and coagulation is prevented. The dispersing agent is used in a quantity of 1 to 10% by weight of the solid content of the dispersion, and the reduced pressure is such that the boiling temperature is 20-40‹C. Dispersing agents named are water soluble polyethers, preferably p-nonyl or p-octyl phenol polyethylene glycol ether, coconut oil fat alcohol polyethylene glycol ether, coconut oil fatty acid polyglycol esters, or sodium cogasin monosulphate. The dispersion to be concentrated is drawn through pipe J into flask A which is under vacuum and is heated and stirred up in circulating through heat exchanger B. Evaporated water passes through bulbs E and is condensed in device F, the remaining dispersion in flask A when it has reached the required degree of concentration is discharged in value through device H. The use of a mixture of dispersing agents reduces foaming. The final concentrated dispersion is up to 80% by weight of solid substance. Falling film or rotary evaporators may be used.
Patent GB-1307509-A (GB)
Title: Chain saw
IPC: F16F1/373
Filed: 1971-11-12
Abstract: 1307509 Chain saws SCOTT & FETZER CO 12 Nov 1971 [12 Nov 1970 15 April 1971] 52695/71 Heading B5L [Also in Division F2] A chain saw comprises spaced shock-absorbing means connecting spaced portions of a front handle to the chain saw body 12, a rear handle 28 independent of the front handle, and spaced shock-absorbing means connecting spaced portions of the rear handle to the chain saw body.
Patent GB-1361015-A (GB)
Title: Reel
IPC: B65H75/14
Filed: 1971-11-12
Abstract: 1361015 Reels; flanges INDUSTRIAL REELS Ltd 10 Nov 1972 [12 Nov 1971] 52748/71 Heading B8M A plastics reel comprises a tubular core 1 and two end flanges, one or each of the flanges comprising two annular flange discs 2, 3 secured face to face, the flange discs 2, 3 having on their adjoining faces at least one pair of ribs 6, 16 of substantially the same configuration whose end surfaces abut and are joined by adhesive. The flanges are preferably circular in cross-section with the inner flange disc 2 being integral with the core 1. The outer end of the core 1 is preferably received in an annular groove formed between concentric walls 9, 10 on the flange disc 3. The outer periphery of the flange disc 3 is received in a recessed portion 5 of an axially extending rim 4 on the inner flange disc 2. A plurality of radially extending ribs 7, 8, 17, 18 may be provided between the peripheries of the discs and the ribs 6, 16. These radial ribs do not abut. A bush 14 may be provided axially extending from the inner periphery of the flange disc 3 and strengthened by ribs 15. Alternatively, a bush 34 may be provided on the inner flange disc 22, which bush 34 is secured to an axially extending wall 35 on the outer flange disc 23. In this alternative embodiment two pairs of concentric abutting ribs 26, 36 and 27, 37 are provided with radially extending ribs between the flange disc peripheries and the neighbouring concentric rib and between adjacent concentric ribs. In a further alternative embodiment, the end of the core is received in an annular groove formed between concentric axially extending walls of the outer flange disc. The outer flange disc in this embodiment is also provided with an axially extending bush of the same length as the radially inner wall forming the groove. The axially inner and outer ends of the bush and said inner wall are joined by annular walls, apertures being provided at circumferentially spaced locations. The reel is preferably formed of polystyrene, but other plastics materials may be used.
Patent GB-1210280-A (GB)
Title: A method for measuring angular velocities by use of the sagnac effect
Inventor: EICHENAUER BERND
IPC: G01C19/72
Filed: 1968-11-07
Abstract: 1,210,280. Interferometry. MESSERSCHMITT-BOLKOW-BLOHM G.m.b.H. Nov. 7, 1968 [Nov. 20, 1967], No. 52834/68. Heading G2J. A method for measuring angular velocities using the Sagnac effect comprises artificially enlarging the effective area round which two light beams circulate in opposite directions relatively to a rotating support, the angular velocity of which is to be measured, by light beam deflecting devices or conducting devices or both, arranged so that light circulates round the area a predetermined number of times prior to measuring the phase difference of the two beams. The normal single circuit of a Sagnac interferometer is replaced by a pair light conducting glass-fibre helices 10 arranged on a rotating support having a speed vector w, the light from a source 20 being transmitted along one coil in the sense of rotation and along the other coil opposite to the sense of rotation. The phase difference Z due to the difference of transmission time at the outlets 14, 15 is determined interferometically, as at 30. The larger the number of coils in each helix the slower the rotational velocities of the support which can be measured.
Patent GB-1204499-A (GB)
Title: Improvements in or relating to apparatus for indicating the orientation of tunnelling machines
Inventor: GAYE FELIX
IPC: E21D9/00
Filed: 1967-11-21
Abstract: 1,204,499. Surveying instruments. COAL INDUSTRY (PATENTS) Ltd. Nov.21, 1968 [Nov.21, 1967j, No.52941/67. Heading G1F. Apparatus for determining the orientation of a tunnelling machine in a tunnel comprises a periscope 6 mounted on and coaxial with an arm 8 which is in turn mounted for angular movement about the central longitudinal axis 11 of the machine, the periscope being capable of simultaneously sighting two spaced targets positioned along the tunnel remote from the machine, means being provided for indicating the angular position of the arm 8 about the axis 11. The arm 8 and periscope 6 are mounted vertically in the control cab of the tunnelling machine in a tunnel comprises a periscope 4 thereof. The arm 8 is adjustable about the axis 11 through a limited angle of say 10 degrees by means of a warm gear and toothed sector operated by a handwheel 18. A vernier scale (not shown) indicates the angular position of the arm 8. Also the arm 18 is adjustable axially on a guide 21 for a distance of say three inches by means of a handwheel 22. The arm 8 carries a platform 30 with a spirit level 32 and counterweight 34. In use two spaced targets which are preferably illuminated are mounted along the tunnel. The arm 8 is then adjusted until the targets appear along the collimation axis of the periscope. If the tunelling machine becomes incorrectly orientated due to misalignment or because of rolling of the machine, the targets will appear to move off the colimation aixs. The effect of rolling can be eliminated by restoring the arm 8 to the vertical position by means of the level 32. The machine is then steered back to its correct orientation with the two targets in coincidence.
Patent GB-1180180-A (GB)
Title: Improvements in or relating to the Construction of Bracelets and the like
Inventor: KING ROGER MILNER
IPC: A44C5/10
Filed: 1968-11-11
Abstract: 1,180,180. Jewellery. MILNER KING. 11 Nov., 1968, No. 53263/68. Heading A3H. In a flexible bracelet, necklace or like article formed from staggered rows of tiles 4 joined by pins 5 passing through aligned holes in adjacent tiles across the article, the pins 5 are secured within the tiles 4 at the edge of the article by means of indentations 7, Fig. 3, formed on the inside surface of the article at a position on the tiles at the edge of the article and away from the side 8 of the tiles at that edge and in a direction along the length of the article. As shown, the tiles 4 are of hollow tubular construction with spacers 6 provided between the pins 5, the spacers 6 being secured to the tiles 4 by the indentations 7.
Patent GB-1463177-A (GB)
Title: Sinterable alumina
IPC: C04B37/00
Filed: 1974-12-10
Abstract: 1463177 Sinterable alumina compositions; glass compositions INTERNATIONAL BUSINESS MACHINES CORP 10 Dec 1974 [2 Jan 1974] 53280/74 Headings C1J and C1M A raw material ceramic admixture, for use in the manufacture of a sintered object, comprises alumina and the ternary glass composition BaO-MgO-SiO 2 . The admixture is preferably of high alumina content, e.g. 80% by weight or more. The composition of the ternary glass may be one of the compositions lying within the triangular region ABC of the ternary phase diagram for that glass, the apices ABC representing the following compositions:- Preferably at least 95% by weight of the alumina content is alpha-alumina. In the examples, the ternary glass sintering aids are prepared by melting the oxides or carbonates in a platinum crucible using radio frequency induction heating. A slip casting composition comprising alpha-alumina, glass, polyvinylbutyral, dioctyl phthalate, methanol, toluene and cyclohexanone is made up and an electrical assembly comprising a plurality of circuit boards prepared in the usual manner.
Patent GB-1087779-A (GB)
Title: Preparation of 2-substituted benzoxazoles
IPC: C07D263/56
Filed: 1965-12-16
Abstract: 2-Trichloromethylbenzoxazoles of the formula <FORM:1087779/C2/1> wherein X represents one or more substituents selected from hydrogen, halogen, nitro, hydroxy, alkyl, alkoxy, aryl, aryloxy, carboxy, carbalkoxy, substituted alkyl (where the substituents are halogen or alkoxy) and substituted aryl (where the substituents are halogen, nitro, alkyl or alkoxy, are made by reacting an o-aminophenol of the formula <FORM:1087779/C2/2> with an alkyl trichloroacetimidate of the formula <FORM:1087779/C2/3> where R is an alkyl group.  It is preferred to use stoichiometric amounts of reactants in the presence of an organic solvent under anhydrous conditions.  Examples describe the preparation of compounds in which X is hydrogen, chlorine, phenyl and/or a nitro group.
Patent GB-1319848-A (GB)
Title: Production of monoethanolamine and triethanolamine
IPC: C07C213/00
Filed: 1970-11-11
Abstract: 1319848 Ethanolamines BADISCHE ANILIN- & SODA-FABRIK AG 11 Nov 1970 [12 Nov 1969] 53607/70 Heading C2C Mono- and triethanolamine are produced by reacting diethanolamine, ammonia and ethylene oxide in liquid phase at 60-150‹ C. and 20- 120 atmospheres, the molar ratio of diethanolamine to ethylene oxide being not more than 1 : 1, and the molar ratio of ammonia to ethylene oxide being from 14 : 1 to 40 : 1. Diethanolamine product is preferably separated and recycled.
Patent GB-1483916-A (GB)
Title: Transportation system employing slide bearings for transportation of heavy objects
IPC: E01D19/04
Filed: 1974-12-12
Abstract: 1483916 Sliding systems ASEA AB 12 Dec 1974 [13 Dec 1973] 53731/74 Heading B7L A transportation system for transporting an object 15 along a slide path 2 of varying inclination employs at least two slide bearings 4 spaced apart along the path 2 and each including a substantially planar layer of plastics material 10, Fig. 5, in sliding contact with the path 2, the object 15 being borne by the bearings 4 in such a way that each slide layer 10 can turn relative to the object 15, about a real or imagined horizontal axis perpendicular to the path direction, during transportation. Each slide bearing 4 includes an inverted U-shaped plate accommodating the slide layer 10 and is equipped with bearing means to provide the pivotal movement of the bearing relative to the object 15. Such bearing means may be on the upper surface of the U-shaped plate as at 16, Fig. 2, and as formed by interconnected fluid-filled cushions 22, Fig. 6, or may be within the U-shaped plate such as a cushion 21 of elastic material, Fig. 5. The slide bearings of Fig. 2 may be provided in pairs, the bearings 4 of each pair being spaced apart along the path 2 and connected to each end of a balance arm (17), Fig. 3 (not shown), by their bearing means 16, the arm (17) pivotally supporting an end of the object 15 by means of further bearing means (18). The pairs of bearings 4 thus form bogies which may themselves be mounted in pairs on further balance arms (19), Fig. 4 (not shown).
Patent GB-1406067-A (GB)
Title: Filter-muffler device
IPC: B60R21/26
Filed: 1972-11-22
Abstract: 1406067 Exhaust gas silencers BENDIX CORP 22 Nov 1972 [23 Nov 1971] 53944/72 Heading F1B [Also in Division B7] A filter muffler for use in a vehicle safety cushion device has a first cylindrical filter element 12 encircled by a second cylindrical filter element 14 and a multi-sided perforated element 16 disposed between the first and second cylindrical elements 12, 14 which are maintained in a spaced mutual relationship. In a preferred embodiment an explosive charge 38 is detonated upon a vehicle collision to rupture disc 36 and allow air from supply 26 to enter bay 28 via conduit 30 and filter muffler 10. Fragments from ruptured disc 36 are removed by filter elements 12, 14 which together with element 16 having perforations 18 distribute the air -flow from conduit 30 to reduce the noise level. Element 16 is preferably made of steel to be sufficiently elastic to further absorb energy from air pulses. Also, a polystyrene foam and plug (22) Fig. 4 (not shown) absorbs energy from such air -flow.
Patent GB-1464147-A (GB)
Title: Device for cutting and inserting a ribbon underneath the presser foot of a sewing machine
IPC: D05B37/04
Filed: 1974-12-17
Abstract: 1464147 Sewing machine ROCKWELLRIMOLDI SpA 17 Dec 1974 [27 Dec 1973] 54403/74 Heading D1G A device is provided in a sewing machine to insert a length of ribbon 14 beneath the presser foot 6 and to sever the ribbon. The device comprises elongate ribbon guide means 11, a feeder selectively operable to feed the ribbon along the guide, cutting means 27 selectively operable to cut the ribbon between the foot and a lower extremity of the guide, a movable ribbon charging element 24 for introducing ribbon beneath the foot, that element being connected to the foot so that as the latter is raised the element contacts the extremity of the guide. The selective operations are actuated by pneumatic valves having push buttons 37, 40, the former operating the cutter mechanism ram 28 while the latter operates a ram (19 Fig. 2 not shown) which raises the presser foot 6 and the element 24, a ram 19 operating ,a flexible ribbon feeding member (15) through a block 16 slidable in guides 17, and a valve 33 directing a flow of air through 23 to blow down element 24 to prevent furling of the ribbon. Adjustable flow regulators 34, 41 control the air flow to the presser lifter and the tube 23. The element 24 has an adjustable side to accommodate ribbons of different widths. The ribbon passes under a plate 22 biassed by springs 21.
Patent GB-1135798-A (GB)
Title: Process for the preparation of alkylene dithiocarbonates
Inventor: LEBRASSEUR GENEVIEVE
IPC: C07D331/02
Filed: 1965-12-23
Abstract: 1,135,798. Production of alkylene dithiocarbonates. ETHYLENE-PLASTIQUE S.A. 22 Dec., 1966 [23 Dec., 19651, No. 54569/65. Heading C2C. Alkylene, aralkylene and cycloalkylalkylene dithiocarbonates are prepared by reacting an alkylene, aralkylene or cycloalkylalkylene oxide with carbon disulphide at 10-70‹ C. in the presence of a catalytic system consisting of an alkali metal halide, e.g. LiC1, LiBr, LiI, NaBr, NaI and KI, water and a co-catalyst, e.g. H 2 S, mercaptans and thioethers, alkyl sulphonium halides, xanthates, thiocarbonates, sulphides of alkali metals and polar solvents, e.g. alcohols and glycols, which are good solvents for the alkali metal halide used, which may either be added to the reaction mixture or formed in situ. Potassium glycol xanthate is prepared by gradually adding 1 mole of granular potash to 1À5 mole of glycol with the temperature held below 50‹ C. When the mixture has a thick appearance it is cooled to 10‹ C. and 1 mole CS 2  added to it dropwise. The ppt. formed is recrystallized from an alcohol-ether mixture.
Patent GB-1127552-A (GB)
Title: Closed cycle cryogenic refrigerator
IPC: F25B9/14
Filed: 1965-12-23
Abstract: 1,127,552. Refrigerating. HUGHES AIRCRAFT CO. 23 Dec., 1965 [18 Jan., 1965], No. 54575/65. Heading F4H. A refrigeration circuit employing ambient air as the refrigerant comprises a condenser 86 cooled by a cold gas refrigerator (Fig. 3), a heat load 17 to which liquid refrigerant entrained in refrigerant vapour is supplied through a flexible conduit 18, a compressor 98 for recycling vapour from load 17 to the condenser and a pressure-responsive valve 132 for admitting ambient air to the circuit when the pressure therein falls below a predetermined value. A further pressure-responsive valve 134 is provided for allowing air to escape from the circuit when the pressure exceeds a predetermined value. Compressor 98 discharges through line 103 to a valve assembly 101 which, depending on the position of a valve member 108, communicates line 103 with either line 112 or line 113 which contain activated charcoal filters 114 and 116 respectively. The non-operative filter is cleaned by electrically heating the same and passing ambient air from a further compressor 99 therethrough via line 119 and either valve 121 or 122, such air being exhausted to atmosphere via either line 123 or 127, valve assembly 101 and a pressure relief valve 126. The cold-gas refrigerator (Fig. 3), for cooling condenser 86 comprises pistons 42 and 56 which reciprocate along mutually perpendicular axes and with a phase-difference of approximately 90 degrees to define compression and expansion spaces 47 and 64 respectively. These spaces inter-communicate through passages 67, from which heat is rejected to atmosphere through the wall of the casing surrounding piston 42, ports 68 in piston 56, a regenerator 69 in the interior of piston 56 and further ports 71 in the head of piston 56. The condenser 86 comprises an insulating block 87 which surrounds and is spaced from the cold head of the refrigerator and includes inlet and outlet passages 92 and 93 respectively. The conduits 10 and 18 for the in- and out-going refrigerants are in heat exchange at 91. Gas leaking into the hollow interior of piston 42 is returned to the compression space 47 by a spring-biased valve 81 at a predetermined pressure.
Patent GB-1390637-A (GB)
Title: Photovoltaic cells
IPC: H01L31/05
Filed: 1972-11-27
Abstract: 1390637 Photovoltaic cell array STONEPLATT CRAWLEY Ltd 1 Nov 1973 [27 Nov 1972] 54721/72 Heading H1K An array of photovoltaic cells comprises a plurality of cells 10 connected in series to form a row, e.g. 15a, a plurality of such rows, e.g. 15a, 15b, 15c and 15d, being connected in parallel to form a group, and a plurality of such groups, e.g. 15a-15d, 16a-16d and 17a-17d, being connected in series to form the array, wherein individual rows of each group are physically separated from other rows of the same group by one or more rows from one or more of the other groups in the array. The cell interconnections are such that if the array, used as a solar energy panel, is fouled in the region 18, e.g. by birds, then the output of the panel is merely reduced rather than cut off completely as would occur if the fouling had spread across all the adjacent rows of one group.
Patent GB-1129990-A (GB)
Title: A method of reducing the amplitude of waves in water
IPC: E02B3/06
Filed: 1965-12-23
Abstract: 1,129,990. Floating breakwaters. J. PIOT. 23 Dec., 1965 [23 Dec., 1964], No. 54744/65. Heading E1H. A breakwater device consists of a casing which defines a number of open ended chambers extending from end to end of said chambers in the same direction and is moored in the water with the direction of the chambers lying in the direction of propagation of the waves. In the parallelpipedic casing shown two open ended chambers extending from end to end of the chambers in the same direction are provided between the upper and lower faces 1 and 2 of the casing and the intermediate partition 7. A second embodiment described consists of a cylindrical casing inside which is a nest of seven cylindrical tubes of circular section.
Patent GB-1116754-A (GB)
Title: Vortex compressors containing built-in mufflers for attenuating the compressor noise
IPC: F04D29/66
Filed: 1966-12-09
Abstract: 1,116,754. Casings for dynamo-electric machines. ROTRON MANUFACTURING CO. Inc. 9 Dec., 1966 [29 Dec., 1965], No. 55330/66. Heading H2A. [Also in Division F1] A driving motor 20 of a compressor (see Division F 1) is surrounded by an annular chamber containing sound absorbent material 42, 46 retained by perforated plates 43,48, to attenuate the noise primarily of the compressor but also the noise of the motor transmitted through the housing 10. Alternatively, the chamber can contain a number of inter-connecting resonant sound-attenuating cavities. An end plate 26 fastened by screws 26a can be removed for replacement or repair of the motor or its bearings.