baber/WOPTO huggingface dataset:
Patent GB-1389425-A (GB)
Title: Frequency divider device with a switchable division ratio
IPC: H03B19/16
Filed: 1972-10-27
Abstract: 1389425 Parametric frequency changers INTERNATIONAL STANDARD ELECTRIC CORP 27 Oct 1972 [29 Oct 1971] 49655/72 Heading H3X A parametric frequency divider is pumped from terminal 11 at a frequency F and selectively provides an output at terminal 18 of frequency F or F/n, the arrangement including a varactor diode 1 coupled to a parallel resonance circuit 7, 8 tuned to frequency F/n generated by the diode, and a band pass filter 17 centred on the same frequency, the varactor diode and the band pass filter being shunted by respective normally-high-impedances P.I.N. diodes 21, 24 which are switched to the conductive state when a frequency F output is required. The pumping frequency is applied to the varactor diode through a band pass filter 12 centred on frequency F, and this filter and a shunting series resonant circuit 4, 5 tuned to frequency F/n isolates the frequency divided by the varactor diode from the pumping source. D.C. sources 26 and 30 are provided for back-biasing the varactor diode and controlling the P.I.N. diodes, respectively, each circuit to a diode including a low pass fiter 27, 28, 29; 31, 32, 34 and 35, 36, 38. The diode control source 30 is normally slightly positive and is raised by a few volts when conduction of frequency F through the diodes 21, 24 is required. In a modification, Fig. 2, frequency division is obtained for a pump frequency of F Œ#F within the pass band 2#F of filter 12, the filter 17 having a corresponding pass band of 2#F/n. In this arrangement the capacitor 5 of the series tuned circuit 4, 5 of Fig. 1, is replaced by a fixed capacitor 39a and a varactor diode 40a, while the capacitor 7 in the parallel tuned circuit 1, 7, 8 is replaced by a fixed capacitor 39b and a varactor diode 40b. Both auxiliary varactor diodes are connected to respective biasing sources 44a and 44b through low pass filters 41a-43a and 41b-43b, the biasing source potentials being adjusted to tune the resonant circuits to the specific value of pumping frequency within the range of FŒ#F in use. By providing individual potentiometers for the varactor diodes a common bias source may be used.
Patent GB-1314927-A (GB)
Title: Seals in aerodynamic pressure-wave machines
IPC: F16J15/32
Filed: 1971-10-27
Abstract: 1314927 Cooling seals BROWN BOVERI & CO Ltd 27 Oct 1971 [29 Oct 1970] 49858/71  Heading F2B [Also in Division F1] An aerodynamic pressure-wave machine for charging a diesel engine comprises a cell wheel 1 supported at its cold end by an overhung bearing 6, 7, a shaft sealing ring 14 disposed between the bearing and the cell wheel, an arrangement for spraying cooling oil on to the sealing ring, and an oil path 30 along which oil escaping past the sealing ring flows to the hot end of the cell wheel where it burns. Oil is fed through air housing 3, bearing 7 and shaft 2 via ducts 18-25 and issued as a spray through ports 26 on to the rubber lip-type sealing ring 14. The spray oil is led away through ports 27, 28 and leakage oil is led through ports 30 into a hollow hub 10 of the cell wheel 1.
Patent GB-1471099-A (GB)
Title: Topical composition
IPC: A61K31/57
Filed: 1975-12-05
Abstract: 1471099 Topical compositions T O K O YAKUHIN KOGYO KK 5 Dec 1975 [20 Dec 1974] 49999/75 Heading A5B A transparent, gelatinous topical composition comprises a steroid, crotamiton, propylene glycol and a carboxyvinyl polymer in an aqueous medium, the composition having been adjusted with an organic amine to a pH of from 5.0 to 7.5 and containing crotamiton in an amount of from 0.5 to 10% by weight. propylene glycol in an amount of from 20 to 80% by weight, water in an amount of from 10 to 80% by weight and a carboxyvinyl polymer in an amount of from 0.3 to 1.5% by weight. The steroid is suitably prednisolone, dexamethasone, triamcinolone, #-methasone, cortisone or an ester thereof or an adrenal cortical hormone.
Patent GB-1517409-A (GB)
Title: Furnace for the production of substantially spherical particles
IPC: B01J2/20
Filed: 1976-12-01
Abstract: 1517409 Furnace for the production of spherical particles COMMISSARIAT A L'ENERGIE ATOMIQUE 1 Dec 1976 [9 Dec 1975]  50107/76 Headings C7X A furnace for the production of spherical particles comprising a vacuum tight chamber 2 having a vertical axis, means 6 e.g. electron beam for heating to the melting point an end zone of an ingot of fusible material e.g. superalloys supported by an adjustable spindle 9 placed along the axis of the chamber and driven in rotation, a container 26 attached to the chamber for the recovery and storage of particles ejected from the molten zone by rotation of the spindle and a rigid screen 60 which is mounted within said chamber around the spindle in order to stop the particles derived from the molten zone prior to solidification of said particles, wherein the screen is formed of material having high thermal conductivity e.g. Cu or Al and is provided with a consumable coating e.g. coumarone resin, alein, tall-oil, triethanolamine on that surface which receives the impact of the particles, said coating being capable of producing around the impact point a vapour atmosphere which modifies the interfacial surface tension of the particles while producing only localized heating of the coating material at the point of impact. The ingot may be raised or lowered on spindle 9, the rigid screen may have cooling fluid circulation tubes 70 and may be raised or lowered by rods or cables 65 and may be attached to an electromagnetic hammer 71.
Patent GB-1222579-A (GB)
Title: Device for the optical scanning of printed documents
IPC: G06V10/12
Filed: 1968-10-23
Abstract: 1,222,579. Character recognition. INTERNATIONAL STANDARD ELECTRIC CORP. 23 Oct., 1968 [28 Oct., 1967], No. 50370/68. Heading G4R. An arrangement for scanning a moving document bearing machine-readable characters comprises two scanning stations spaced along the direction of document feed so that the document can only be under one scanning station at any given time, the stations having respective optical arrangements for imaging character information on to common light transducer means, there being an optical sink behind each station to reduce any effect on the transducer means of light from the station not in use. The optical sinks may be grooves in feed drums, gaps between parallel sections of feed belts, gaps between the discs of disc packs used for document feed (such a pack may be used at each station, the discs of the two packs being interleaved), or a black velvet support over which the document passes. Alternatively, two aligned windows may be provided at each station in respective plane metal sheets between which the document moves. In this case, reading light reaches the document through one window and is deflected back by the document if present, but if the document is absent the light leaves through the second window to a dark region and so does not affect the light transducer means. Blackening may be used to improve the optical sinks. The light transducer means is a matrix of photocells. The two stations are for reading different lines of the document and may be displaceable transverse to the document feed direction to select different lines, e.g. in the plane metal sheets embodiment. This may be done in other embodiments by mounting each station on a respective pivoted lever, and prisms may be provided in the light paths (to the photo-cells) to compensate for resulting skewing of the character images.
Patent GB-1414235-A (GB)
Title: Method for purifying cyclodextrin-producing enzymes
IPC: C12N9/10
Filed: 1973-10-30
Abstract: 1414235 Purifying cyclodextrin-producing enzymes HAYASHIBARA KK S OKADA and S KITAHATA 30 Oct 1973 [30 Oct 1972] 50381/73 Heading C3H A method of purifying a cyclodextrinproducing enzyme involves contacting an aqueous solution of the contaminated enzyme, e.g. the filtrate of a culture broth of Bacillus macerous or Bacillus megaterium, with starch and/or cyclodextrin (cycloheptadextrin, cyclohexadextrin or crude cyclodextrins) and then eluting the enzyme that has been absorbed thereon. In a preferred procedure, there is added to the initial impure solution ammonium sulphate in a concentration of 25-30% saturation or a hydrophilic organic solvent (ethanol, acetone or isopropanol) up to 30% v./v., as a result of which any co-existing protein is rendered turbid and may be filtered off, starch is introduced and the resulting starch suspension is passed through a layer or column of starch including a small amount of diatomaceous earth. The starch layer is washed with an aqueous solution of ammonium sulphate and/or a hydrophilic organic solvent, the washed starch is suspended in dilute aqueous sodium hydrogen phosphate solution and a solution of the purified enzyme is recovered by filtration.
Patent GB-1430207-A (GB)
Title: Airtreating gel compositions
IPC: A61L9/04
Filed: 1973-10-31
Abstract: 1430207 Air-treating gel SECTO CO LTD 24 Oct 1974 [31 Oct 1973] 50552/73 Heading A5E A gel composition for treating air comprises by weight 92 to 95% of an aqueous medium, 2.30 to 2.75% potassium carrageenate, 0.23- 2.0% silica, 0.04 to 0.15% 3, 5, 5-trimethylhexanal and 3-5% of a volatile active ingredient. Preferably the active ingredient is a deodorant, an insecticide or a perfume. Additional ingredients include a fungicide, dyestuff, surfactant and/or preservative.
Patent GB-1433265-A (GB)
Title: Method and apparatus for simultaneously drilling and logging
IPC: E21B47/01
Filed: 1973-10-31
Abstract: 1433265 Boring earth &c I J McCULLOUGH 31 Oct 1973 50569/73 Heading E1F Logging-while-drilling apparatus includes an electric cable 40 extending down through the drill string, the cable being in electrical contact at its lower end with a probe 61 positioned adjacent the drill bit 16 and being connected above ground to signal receiving and recording equipment 45. The cable enters the string through a swivel 25, a pack-off unit 52 being provided to seal against loss of drilling fluid, to prevent the cable rotating, and to ensure the cable advances with the string as the bit advances into the earth. In the embodiment shown, the cable is fixed to the probe 61 which is rotatably received in a socket 60 in the drilling bit. The probe may include down-the-hole equipment (82), Fig. 2 (not shown), such as an amplifier, and insulation (85), e.g. aluminium oxide, is provided at the lower end of the string and between the bit and string to ensure that signals from the formation are received principally from the bottom face of the well and are not affected by the drilling fluid. In an alternative embodiment, Fig. 3 (not shown), the probe (96) is completely insulated from the string (18) and drill bit (116), it rotates with the string and bit, it has its own drillbit portion (102) disposed centrally of the main bit (116), and is electrically connected to the stationary cable via a rotary coupling (126, 128). The probe drill-bit portion may be hollow (Fig. 5 not shown) to obtain core samples.
Patent GB-1529907-A (GB)
Title: Two-wire transmission system for vortex flowmeter
IPC: G08C19/00
Filed: 1976-12-03
Abstract: 1529907 Two-wire transmission system for flowmeter FISCHER & PORTER CO 3 Dec 1976 [9 March 1976] 50576/76 Heading G1U Low-frequency signals from Piezo-electric generators 12, 13, forming part of a vortex flowmeter, are caused to modulate the current drawn from a remote D.C. source 16 by a D.C.-to- D.C. converter 17, including a high-frequency oscillator Ql, Q2, Tl, and a rectifier 22, 24, and a pre-amplifier 14 having a resistive load 25. In operation, as the signals 12, 13 vary, the current through the resistive load 25 varies and the supply current drawn by the amplifier 14 from the D.C.-to -D.C. converter varies. This, in turn, varies the load on the D.C. source, and the resulting voltage variation across a shunt resistor 28 can be extracted at a terminal 15.
Patent GB-1513990-A (GB)
Title: Boron nitride-based superhard material and process for the production of the same
IPC: C22C26/00
Filed: 1976-12-07
Abstract: 1513990 Boron-nitride based material INST FIZIKI TVER TELA I POLUPROVODNIKOV AKAD NAUK BELORUS SSR 7 Dec 1976 50949/76 Headings C7A and C7D A superbond material suitable for cutters, drilling bits, mills, saws and other tools consists of a solid solution of an additive material, which is at least one element from gpIII of the Periodic Table or boride thereof, in a close-packed modification of BN with the composition B 42-61 at % N 39-50 at % Additive 0À1-30 at % The material is made by mixing the components and pressing at 50-95 K bar and 1500-3000‹C for specified periods after compacting at 5-10,000 kg/sq cm and drying.
Patent GB-1494097-A (GB)
Title: D-homo-20-keto-pregnanes
IPC: C07J63/00
Filed: 1974-11-25
Abstract: 1494097 D - homo - 20 - keto - pregnanes SCHERING AG 25 Nov 1974 [30 Nov 1973 19 April 1974] 51006/74 Heading C2U Novel D-homo-steroids of the formula wherein R 1  is O, H(#-OR 5 ) or H(α-OR 5 ) in which R 5  is H or C 1-5  acyl, R 2  is H or CH 3 ; R 3  is O, H 2 , H(α-OH) or H(#-OH); R 4  is H, OH or O acyl; R 6  is H or CH 3 ; and R 7  is H, -COCH 3 , OH or C 1-5  acyloxy, and the wavy lines indicate α- or #-configuration, are prepared by catalytic hydrogenation of corresponding D-homo-steroids of the formula wherein there is a #<SP>4</SP>- or #<SP>5</SP>-double bond and/or a #<SP>16</SP>- or #<SP>17</SP>-double bond, followed, when desired, by inversion of a 3- and/or an 11- and/or a 16-OH group, oxidation of a 3- and/or 11-OH group, reduction of a keto group, hydrolysis of an acyloxy group and/or esterification of an OH group. 3α-Acetoxy-D-homo-5#-pregnane- 11,20-dione and the corresponding 3α-ol, and the preparation of the first of these from the corresponding #<SP>17(17a)</SP>-compound, are however not claimed. D - homo - pregna - 4,17(17a) - diene - 3,20- dione is prepared by Oppenauer oxidation of 3# - hydroxy - D - homo - pregna - 5,17(17a)- dien - 20 - one. 21 - Acetoxy - 11# - hydroxy- D - homo - #<SP>4</SP> - pregnene - 3,20 - dione is prepared by microbiological hydroxylation, using Curvularia lunata, of 21-acetoxy-D-homo-#<SP>4</SP>- pregnene - 3,20 - dione to give 11#,21 - dihydroxy - D - homo - #<SP>4</SP> - pregnene - 3,20 - dione followed by re-acetylation of this. D-homo- #<SP>4</SP> - pregnen - 3,11,20 - trione is prepared by microbiological hydroxylation, using Aspergillus ochraceus, of D-homo-progesterone to give 11α- hydroxy - D - homo - #<SP>4</SP> - pregnene - 3,20 - dione, or, using Curvularia lunata, to give the corresponding 11#-ol, followed by oxidation of either of these. 3# - Acetoxy - 17α - methyl - D - homo- #<SP>5</SP> - pregnen - 20 - one is prepared from 3#- acetoxy - D - homo - pregna - 5,17(17a) - dien- 20 - one. 3# - Hydroxy - D - homo - 17a α- pregn - 5 - en - 20 - one. is prepared by hydrolysis of the corresponding 3#-acetoxy compound, in turn prepared, together with 3#-acetoxy-D- homo - #<SP>5</SP> - pregnen- 20 - one, by catalytic hydrogenation of 3#-acetoxy-D-homo-pregna- 5,17(17a) - dien - 20 - one. 16 - Acetyl - 3#- hydroxy - D - homo - pregna - 5,16 - dien - 20- one is prepared from 3#,20-diacetoxy-D-homopregna-5,16,17a(20)-triene. 3α - Hydroxy - D - homo - 5# - pregnane- 11,20-dione is prepared by hydrolysis of the corresponding 3α-acetoxy compound. The steroids of the Formula (I), including the 2 compounds not claimed per se, are anaesthetic agents, and they may be made up into pharmaceutical compositions with suitable carriers.
Patent GB-1180911-A (GB)
Title: Improvements relating to Animal Huts.
Inventor: IRVINE PETER RONALD
IPC: E04H5/08
Filed: 1965-12-01
Abstract: 1,180,911. Huts. P. R. IRVINE. 1 March, 1967 [1 Dec., 1965], No. 51036/65. Heading E1A. A readily dismountable hut for animals consisting of a roof 20, 21, walls 5, 11, 12 and a floor 1 bolted together has each section so designed, as by the suitable provision of fixing battens such as 6, 7, 12, 22 that any section may be reversed with the inside panel than facing outwardly and vice versa. The panels are preferably made of waterproofed plywood or comprise a wooden framework surfaced on both sides with metal or glass fibre sheeting. A spare interchangeable door frame may be supplied together with a dismountable paddock wall.
Patent GB-1439560-A (GB)
Title: Acrylonitrile copolymers suitable for making flame-resisting fibres
IPC: C08F220/44
Filed: 1974-11-26
Abstract: 1439560 Acrilic copolymer fibres SOC ITALIANA RESINE SIR SpA 26 Nov 1974 [28 Nov 1973] 51136/74 Heading B5B [Also in Division C3] Fibres are made from a copolymer comprising at least 50 wt. per cent acrylonitrile, 2-30 wt. per cent vinyl or vinylidene chloride, 0-10 wt. per cent of a neutral, ethylenically unsaturated, non-halogenated monomer and 2-40 wt. per cent of alpha-bromoacrylonitrile by extruding the copolymer dissolved in a solvent such as, N,N-dimethyl formamide, ethylene carbonate, N,N-dimethyl sulphoxide, sodium thiocyanate, zinc chloride or nitric acid into a coagulating bath consisting of a mixture of water and dimethylformamide or dimethylacetamide, aqueous solutions of salts, hydrocarbons, or alcoholic substances. In Example 1 a copolymer comprising in per cent by weight 77% arcylonitrile, 15% vinylidene chloride and 8% alpha-bromoacrylontrile is dissolved in dimethyl acetamide and then extruded into a coagulating bath of dimethyl acetamide and water at 50‹ C., then washed and stretched at 98‹ C.
Patent GB-1084709-A (GB)
Title: Apparatus for conveying a thin film sheet to a packaging machine
IPC: B65B41/06
Filed: 1965-12-02
Abstract: 1,084,709. Wrapping machines; endless conveyers. HERCULES Inc. Dec.2,1965 [Dec. 2, 1964], No. 51231/65. Headings B8A and B8C. [Also in Division B6] In a package wrapping machine (Figs. 1 and 2), a synthetic plastics film is fed from a supply roll (A) by rollers (B) to a cutting station (C) and sheets of a predetermined size are delivered to the wrapping station above an elevator (D). The elevator (D), with an item to be wrapped resting thereon, rises to contact the sheet, following which the item is pushed off the elevator by pusher (F) to a conveyer (b) which carries it through. the remainder of the wrapping operation, then to heat sealing means (H) and from there take-off conveyer J carries it to further operations such as e.g. crating and shipping &c. The sheet delivery apparatus comprises two parallel, spaced-apart, perforated suction belts 18 passing around pulleys and suction chambers 24. Each suction chamber 24 has a plurality of vacuum lines with valves 31, which communicate with a suction fan 33. The positive pressure side of the fan 33 communicates with the suction chamber 24 via a line with valve 32. In operation, when the top 23 of the elevator (D) brings the item into contact with the sheet held by the belts 18, valves 31 shut off the vacuum, and at least atmospheric pressure is applied to the chambers, so that the sheet is lifted cleanly from the belts. In an alternative embodiment (not illustrated) the vacuum in the chambers may be created by means of steam jets.
Patent GB-1210662-A (GB)
Title: Propeller shaft packing for ships
Inventor: LUCY JOACHIM
IPC: B63H23/36
Filed: 1967-11-10
Abstract: 1,210,662. Shaft seals. INSTITUT FUR SCHIFFBAU. 10 Nov., 1967, No. 51329/67. Heading F2B. In a packing arrangement for the seaward end of a propeller shaft tunnel or stern tube comprising a guide ring 3 secured to a housing 5 and carrying sealing rings 1 engaging a bush 2 for mounting on and rotating with the shaft, a bearing collar 7 of L-section is fixed on the bush and abuts a seaward facing shoulder 8 on the guide ring 3. Sealing elements 6 are provided between the rings 1 and the collar 7 to exclude grit from the latter. The guide ring 3 is secured to the housing 5 by elastic sleeves 4. In use, the bush 2 and housing 5 are secured to the propeller hub and shaft tunnel respectively.
Patent GB-1286285-A (GB)
Title: Means for securing a spectacle frame on a work- or clamping-table
IPC: G02C13/00
Filed: 1969-10-20
Abstract: 1286285 Securing work WERNICKE & CO KG 20 Oct 1969 [5 Nov 1968] 51331/69 Heading B3D Means for securing a spectacle frame F on a work-table 1, e.g. for grinding or for co-operation with a feeler to control a grinding operation, comprises adjustable clamping bars 4, 13, one of which bears a plate 16 for universal adjustment in a plane parallel to the table surface and the other of which has a rod 5 adjustable on a bolt 7 rotatably mounted on the table 1. The rod 5 may be locked by means of a clamping nut 11, and a further bolt (18), Fig. 2 (not shown), passes through a hole (17) in the plate 16 and bears a clamping nut (19), the hole (17) being of much greater diameter than the bolt (18), to facilitate the universal adjustment.
Patent GB-1286287-A (GB)
Title: Voltage dependent resistors
Inventor: MATSUOKA MICHIO
IPC: H01C7/112
Filed: 1969-10-22
Abstract: 1286287 Ceramic compositions MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 22 Oct 1969 [22 Oct 1968] 51691/69 Heading C1J A voltage dependant resistor comprises as its active element a ceramic body consisting essentially of (defined) ZnO and 0À05-10 mole per cent PbO and with a pair of electrodes applied to opposite major surfaces of the body. 0À05-8 mole per cent of Bi 2 O 3 , CaO or CoO; or 0À05-8 mole per cent of Bi 2 O 3  and 0À05-8 mole per cent of CaO or CoO can also be included.
Patent GB-1273606-A (GB)
Title: Disc filter sector assembly and separable components thereof
Inventor: PETERSON C LYNN
IPC: B01D33/23
Filed: 1969-10-22
Abstract: 1,273,606. Demountable filter disc sectors. PETERSON FILTERS & ENG. CO. 22 Oct., 1969, No. 51698/69. Heading BID. A sector for a demountable filter disc (Fig. 1, not shown) comprises a set of four supports 55, 56 arranged in pairs with the filtrate collecting grooves 58b in their flat surfaces extending generally radially and some opening through slots 59 into an internal drain channel defined between the adjacent radial edges of each pair of supports (Fig. 16). Over this sector may be arranged a preformed wire mesh or perforated metal filter sleeve (Fig. 6, not shown), reinforced along its radial edges and removably clamped to the supports (Fig. 5, not shown) at its radially inner and outer edges. Channel section members 30 are screwed to the edges of radially inner bell 25, which passes the filtrate from the sector to the shaft on which the filter disc is mounted. Members 30 extend along the radial edges of adjacent sectors and receive rods (26) whereby sectors are aligned and clamped to the shaft. Supports 55, 56 are themselves clamped together and to bell 25 by inner and outer members 29, (23) which clamp the filter sleeve. In Figs. 18 to 22 (not shown) the removable filter sleeve is replaced by two separate pieces of medium folded round and secured to the radial and outer edges of the outer supports by staples. In Figs. 23-26 (not shown) the medium is secured to strips of plastics along radial and outer edges of the supports. The supports may be wood or plastics, other components are metal. The lattice structure supports on the right-hand side of Fig. 12 are outside the scope of the present invention.