baber/WOPTO huggingface dataset:
Patent GB-1225423-A (GB)
IPC: H03J5/24
Filed: 1968-03-27
Abstract: 1,225,423. Tuning arrangements. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. 27 March, 1968 [30 March, 1967], No. 14635/68. Heading H3Q. A tuning arrangement using a varicap diode which can be made conducting or non-conducting for band-switching is temperature compensated by a second varicap diode conducting when the first is non-conducting and vice versa, so that the capacitance variation of each varicap diode with temperature is compensated by that of the other conducting diode. Fig. 3 shows a transistor oscillator for a television receiver operating in Bands I and III. For Band III the switches S 1 -S 4  are as shown by the solid lines, tuning being effected by a potentiometer 4, 5, 6 across a regulated source 3 and an unregulated source 7. The resonant collector circuit consists of inductors 20, 21 connected in parallel by a conductive varicap diode 2, tuned by capacitor 22 and reverse-biased varicap diode 1. Feedback to the emitter occurs by capacitor 11 which forms a voltage divider with capacitor 13 and reversebiased varicap diode 12. For Band I the switches S 1 -S 4  are put in the dotted position where varicap diode 1 becomes conducting and short-circuits the inductor 21 and capacitor 22, leaving inductor 20 and reverse-biased varicap diode 2 to form the collector resonant circuit. At the same time varicap diode 12 becomes conducting so that the feedback potential divider comprises capacitors 11 and 13 only. Temperature variation of diode 1 (when reverse biased) is only serious at low voltages, i.e. when the slider of potentiometer 4 is at or near its lowest point. Since resistor 5 is of low value, variation of capacitance with temperature is compensated by a variation of its bias voltage due to variation of the voltage drop across the conductive diode 2. Resistors 14-19 are connected to other varicap diodes in the signal-frequency circuits of the receiver and these will be temperature compensated in a similar manner.
Patent GB-1225726-A (GB)
IPC: D01F9/15
Filed: 1969-05-08
Abstract: 1,225,726. Carbon filaments from coal-tar pitch. GREAT LAKES CARBON CORP. 8 May, 1969 [4 June, 1968], No. 23617/69. Heading C1A. [Also in Division C5] A process for producing filamentary carbon comprises melt-spinning a coal-tar pitch which is substantially free (less than 2%) of secondphase material (i.e. quinoline insolubles) and has a softening point in the range of 230‹ to 320‹ C., and converting the resulting pitch filaments into carbon filaments by controlled oxidation and carbonization. Before the pitch is melt-spun it should be preconditioned if necessary (see Division C5). The pitch should be spun at a temperature between its softening point and 350‹ C., and may be oxidized, carbonized and graphitized, e.g. oxidized in air for 60-120 hours at a temperature at least 10‹ C. below the softening point of the preconditioned pitch, followed by cooling, oxidizing and cooling rates being 3-10‹ C./hr. Carbonization and graphitization may be effected by heating at 700-2800‹ C. in an inert atmosphere, the heating rate not exceeding 10‹ C./hr. until the filament becomes substantially infusible.
Patent GB-1226073-A (GB)
IPC: B65D85/30
Filed: 1969-08-08
Abstract: 1,226,073. Protective packaging. WILLCOX & GIBBS Inc. 8 Aug., 1969 [9 Aug., 1968], No. 39706/69. Heading B8C. A method of packaging articles comprises the steps of placing an article 10 in a container 11, inserting moist expandible resin particles 13 into the container to surround the article and fill the container to a desired amount, closing the container and subjecting the closed container to RF energy to dielectrically heat the moisture around the particles and provide heat throughout the package to expand the particles and to cause the contacting surfaces of the particles to fuse together. As shown, in which the container 11 is made of cardboard, paperboard laminated sheet or a plastics material, the resin particles are preferably of expandible polystyrene beads. The exterior of the container may be confined and supported in a machine having a frame 18 comprising a container chamber 19 defined by plates 21-25, the plates 21, 22 which carry RF electrodes, being urged to a retracted position by springs 28 and to a position in which they engage the container, by inflatable bags 29. The packaged article 10 is enclosed in a plastics bag 30 or in a metal foil wrapping. Removal of the article 10 from the container may be facilitated by a tearstring to split the container, or by a perforated separator sheet. The bag 30 may be integral with the separator sheet.
Patent GB-1228117-A (GB)
IPC: H04M1/60
Filed: 1969-12-17
Abstract: 1,228,117. Substation circuits; automatic volume control. SIEMENS A.G. 17 Dec., 1969 [20 Dec., 1968], No. 61410/69. Headings H4K and H4R. A substation provided with a loudspeaker has a receiver which gives automatic volume control unless the subscriber overrides the control to obtain a lower or a higher gain in circumstances in which the automatic control is unsuitable, automatic volume control being restored whenever a different or an additional line is connected to the substation. The arrangement prevents a newly connected line from encountering a grossly inappropriate gain setting. Loudspeaker LS and microphone FM are normally connected, the handset receiver and transmitter FH, HM, being substituted when the handset is taken down and hook switch GU operates relay GUH. With the handset in use the loudspeaker may also be connected in parallel by operating key LZT to energize LZ1 which locks up with LZ2 when LZT is released. Reoperation of key LZT disconnects the loudspeaker by releasing LZ1 and LZ2. Lamps L1 and L2 light alternately to indicate whether key LZT will connect or disconnect the loudspeaker. Transmitting amplifier SV and receive amplifier EV work over a hybrid GA the balance of which is set automatically depending on whether a connection is made to an internal or an external line. Two external lines are shown, Uel, Ue2, connection being obtained by operation of a key AT1 or AT2 and associated line connecting relays W1, W2. If key AT1 is operated, for example, W1 operates and holds to line, relay GU operating with no disclosed effect, and relay LK operating but falling back when key AT1 is is released. With LK back a path is established to operate relay N which conditions automatic gain control circuit SVR to be operative. The gain of the receiver under control of SVR is preset by a potentiometer R3. If a higher gain is required, . as in the presence of noise, key LAT is pressed to drop N and operate LA, thus establishing a gain as preset by potentiometer R1. To restore automatic control key LET is pressed to drop LA and re-energize N. To obtain a lower gain, key LET is pressed again to drop N and energize LE to establish a gain preset by potentiometer R2. To increase the gain from this situation, LAT is pressed to drop LE and restore N. To increase gain further LAT is pressed again to drop N and energize LA; further control of gain passing to key LE, and so on. Lamps L3 and L4 illuminate instructions to indicate which of the keys LA, LE is operable to alter gain; both lamps lighted indicating automatic control with a choice of louder or softer gain. If a line is disconnected any operated one of the relays LA, N, LE, is released so that the next connection made will start with automatic volume control. If a second line is connected to an existing connection, as with an enquiry path, actuation of a second key such as AT2 operates LK momentarily to release any operated one or LA, N, LE; relay N operating or reoperating on release of the key to ensure that the new line is provided with automatic volume control.
Patent GB-1229502-A (GB)
IPC: C23C22/00
Filed: 1969-05-22
Abstract: 1,229,502. Ornamenting. ALLEGHENY LUDLUM STEEL CORP. 22 May, 1969 [31 May, 1968], No. 26289/69. Heading B6G. [Also in Division G5] Contrasting coloured designs on metal are produced by: (1) treating the metal to colour the metal surface, inscribing a design into the metal so the base metal is exposed through the coloured surface, and coating the inscribed and coloured metal with a heat and corrosion resistant transparent coating; (2) coating the metal with a heat and corrosion resistant transparent coating, inscribing the design into the metal through the coating so that the base metal is exposed, treating the metal to colour the exposed base metal, and coating the inscribed and coloured metal with a heat and corrosion resistant transparent coating; or (3) treating the metal to colour the metal surface, coating the coloured metal with heat and corrosion resistant transparent coating, inscribing the design into the metal through the coating and colour so as to expose the base metal, and treating the inscribed metal to colour the exposed base metal, and coating the inscribed and coloured metal with a heat and corrosion resistant transparent coating. The metal may be steel, brass, copper, aluminium, zinc, magnesium. The metal may be coloured by heating, chemical treatment, applying metal coatings by dipping, spraying or electroplating. The design may be inscribed by mechanical, chemical or electrical means. The transparent coating may be vitreous, e.g. silicates, organic, e.g. polymers of acrylic and methacrylic acids and may be applied by brushing, dipping, roller, or spraying. Preferably the coating is subsequently baked to render it sufficiently insoluble to withstand subsequent hydration. The metal may be cleaned prior to the colouring treatment or application of the coating.
Patent GB-1232440-A (GB)
IPC: B28B17/00
Filed: 1968-10-01
Abstract: 1,232,440. Heated cutter. FORD MOTOR CO. Ltd. 1 Oct., 1968 [3 Oct., 1967], No. 46486/68. Heading B5A. [Also in Division B3] A rotary cutting tool for cutting soft materials such as model clay and polystyrene has cutting edges projecting from a body portion and disposed to form an aperture 18 which provides for escape of the cuttings. The cutter holder, Fig. 9, includes an induction coil 90 which may be used to heat the cutter in operation in order to facilitate the cutting process.
Patent GB-1250652-A (GB)
Inventor: WILSON BRUCE N
IPC: C08G63/685
Filed: 1968-10-30
Abstract: 1,250,652. Alkyd resin coating. HOOKER CHEMICAL CORP. 30 Oct., 1968 [13 Nov., 1967; 26 Jan., 1968], No. 51533/68. Heading B2F. [Also in Division C3] Coating compositions utilisable for coating metals (especially steel) are made by dissolving an alkyd resin derived from nitrilotriacetic acid, a diacid and a diol (see Division C3) in a solvent (e.g. an alcohol and/or hydrocarbon) or by neutralising the resins with ammonia, an amine or an amino alcohol and dissolving them in water. The coating compositions may also contain a cross-linking agent, e.g. hexamethoxy methyl melamine.
Patent GB-1257312-A (GB)
IPC: F16H25/22
Filed: 1968-05-14
Abstract: 1,257,312. Screw-and-nut gearing. ROTAX Ltd. 5 May, 1969 [14 May, 1968], No. 22745/68. Heading F2Q. In a recirculating ball-type screw-and-nut gear, the means for returning balls from one end to the other of a portion of the groove 11 in the nut 10 comprises two inserts 16 in radial apertures 14 in the nut, the inserts having scoops 19 which depend into the groove 12 of the screw 13 and face in opposite circumferential directions, the scoops being connected by a. return passage partly definedby. the base surface of a slot 15 in the outer surfaceof the nut between the apertures 14. As shown, the apertures 14 are cylindrical and open into adjacent turns of the groove 11. The inserts 16 have. D-shaped heads 17 the flats of which interengage to prevent rotation of the inserts. In a modification (Fig. 4, not, shown), the apertures (28) are more than one groove pitch apart and are elongated circumferentially, the inserts being similarly shaped. The top of the slot (15) is covered by a plate.
Patent GB-1258964-A (GB)
IPC: C09C1/42
Filed: 1969-03-10
Abstract: 1,258,964. Increasing clay brightness. J. M. HUBER CORP. 10 March, 1969, No. 12538/69. Heading C1A. The brightness of kaolin clays is improved by adding oxalic acid or an acid solution of an oxalic acid salt to a water-clay slurry in an amount of at least 50 pounds per ton of dry clay, and subjecting the slurry to the high shear action of an impellor, the peripheral speed of which is 2,000 to 11,000 FPM, for 20 to 70 minutes at a temperature between 80‹ C. and the boiling point of the slurry. The oxalic acid salt may be the sodium, potassium or ammonium salt. The concentration of clay solids in the slurry may be 20 to 60%.
Patent GB-1259299-A (GB)
IPC: G03B23/06
Filed: 1969-01-09
Abstract: 1,259,299. Slide projectors. EASTMAN KODAK CO. Jan. 9, 1969 [Jan. 9, 1968], No.34480/71. Divided out of 1, 259, 298. Heading G2A. A rotary slide tray comprises a member 18 containing slides 16 which are retained in their compartments by a member 20 with a radial passageway to successively release slides from their compartments, there being a detent between the two members consisting of inwardly directed notches 100 on portion 62 of member 18 which are engaged by a spring-biased element 96 on member 20, element 96 being movable out of engagement with notches 100.
Patent GB-1264388-A (GB)
IPC: C03B37/027
Filed: 1969-05-01
Abstract: 1,264,388. Optical fibres. CARL-ZEISSSTIFTUNG [trading as JENAER GLASWERK SCHOTT & GEN]. May 1, 1969 [May 2, 1968], No.22328/69. Heading G2J. [Also in Division C1] One or more black glass fibres 12 are fused into the outer surface of the sheath 10 of a conventional optical fibre 7 in order to absorb scattered light. A method of making the composite fibre is described (see Division Cl Abridgment).
Patent GB-1265348-A (GB)
IPC: G01N33/00
Filed: 1969-11-14
Abstract: 1,265,348. Electro-chemical analysis. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Nov. 14, 1969 [Nov. 19, 1968], No. 55848/69. Heading G1N. In a system for electro-chemical monitoring of constituents in a flowing fluid, (e.g. SO 2  in air), provision is made for frequent ZERO SETTING with the CARRIER ONLY flowing, and CALIBRATION with the addition of a KNOWN QUANTITY of the constituent. As shown, a motor driven 3-way cock 7, diverts air through a SO 2  -absorbing filter 6 to set the zero of test cell 9 with only the carrier flowing via passage 1, 3. Then the carrier is directed through passage 1, 4 to pick up a known quantity of SO 2  from absorption cell 8, before reaching the measuring cell 9, and finally air flows directly through passage 2, 3 for measurements. Air is sucked through the monitor at a constant rate by vacuum-pump 25 with capillary constrictions 23, 24 in the suction lines. Inlet filters such as a gauze particle strainer 17, and dust filter 18 may be provided together with an absorber 21 for ozone, hydrogen sulphide, and chlorine, which would interfere with the measurements. An absorption cell with a semi-permeable membrane connection to the SO 2  calibration source is described, Fig. 5 (not shown). Modifications. A multiposition cock may be used, Figs. 2, 4 (not shown) providing a plurality of passages 1-4, selectively connecting to a plurality of series arranged absorption cells, to provide several levels of concentration of SO 2  for calibration.
Patent GB-1266800-A (GB)
IPC: F21K5/14
Filed: 1970-12-09
Abstract: 1,266,800. Flash-bulbs. GTE SYLVANIA Inc. Dec.9, 1970 [Dec.22, 1969], No.58494/70. Heading G2L. A method of making a percussive flash-bulb includes the step of chemically etching the anvil wire of the primer to roughen the surface before coating it with fulminating material. The wire preferably consists of stainless steel and the etchant is a solution containing equal parts by weight of water, concentrated hydrochloric acid and ferric chloride hexahydrate. The etched surface is passivated by flame or hot air oxidation.
Patent GB-1288766-A (GB)
IPC: B01D1/22
Filed: 1969-01-30
Abstract: 1288766 Evaporators; film type; distillation of water T E AITCHISON 14 Jan 1970 [30 Jan 1969] 5238/69 Heading B1B Liquid flows from tank 6 (Fig. 1) through openings 7 into housing 1 where the liquid is formed into a vortex by vanes 4 rotated by shaft 2, and the thin layer of liquid at the upper part of the vortex is heated by jacket 11 so that vapour is evolved. Non-evaporated liquid is discharged from housing 1 through outlet 15 by pump 16. Above each set of vanes 4 is a separator 5 for removing liquidparticles from the vapour. The apparatus may be used to obtain fresh water from sea water, the top level of which is shown by line 19. The vapour leaving outlet 17 flows to condenser 20, which may be connected to an airextractor so that the apparatus operates under vacuum. The jacket 11 is provided with helix 25 to direct the heat-carrying medium over fins 24. The evaporator may form part of a multiple-effect unit, i.e. the vapour flowing from outlet 17 is passed to the jacket of another similar evaporator stage. In Fig. 3, a vortex of liquid is formed in perforated cylinder 41 by rotating vanes 4 and, when in operation, the level of the liquid in casing 27 is at L2. Hot air is introduced into the casing through tube 36 and is withdrawn through tube 37. Vapour flows through apertures in tube 30 to outlet 17. An apparatus with an unsupported liquid vortex is referred to.
Patent GB-1289319-A (GB)
IPC: H01B1/08
Filed: 1969-12-02
Abstract: 1289319 Voltage variable resistors MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 2 Dec 1969 [2 Dec 1968 (2) 3 Dec 1968 (2)] 58860/69 Heading H1K A voltage variable diode resistor the current in which is represented by the equation (V/c)<SP>n</SP>, consists of a sintered body principally of zinc oxide but including from 0.05-8 mol. per cent of Bi 2 O 3  and 0À05-10 mol. per cent of at least one of Nb 2 O 5 , ZrO 2 , V 2 O 5  and WO 3  carrying at least one non-ohmic contact, preferably formed of silver paint. The value of C is increased by making both contacts non-ohmic. Stability of the characteristics in temperature cycling and electric loading tests is enhanced by using for the non-ohmic elcetrode(s) specified mixtures of silver, or reducible compounds thereof, silica, boric oxide, and lead oxide or bismuth trioxide and even further by inclusion in the mixture of traces of cobalt and/or manganese oxides. The mixture is applied as a paste comprising phenol, vinyl or epoxy resin in an organic solvent and fired at 300-850‹ C. in an oxidizing atmosphere. Protection against moisture is afforded by potting in epoxy or phenol resin. When one contact is ohmic it may consist of Al, Zn, Sn, In, Ni or Cu applied by spraying, plating or vapour deposition and lead wires can be attached with soft solder or silver paint. Reduced resistivity can be obtained by carrying out the body sintering in nitrogen or argon and/or by quenching in air thereafter. Numerous examples of body and electrode compositions are given. Reference has been directed by the Comptroller to Specifications 1,156,436 and 1,130,108.
Patent GB-1307433-A (GB)
Title: Trichlorotriffluoroethane solvent compositions
IPC: C11D7/50
Filed: 1970-07-07
Abstract: 1307433 Cleaning solvent IMPERIAL CHEMICAL INDUSTRIES Ltd 21 June 1971 [7 July 1970] 32948/70 Heading C5D  The cleaning properties of trichlorotrifluorol ethane are enhanced by mixing it with ethano- and acetonitrile. The preferred isomer is 1,1,2- trichloro-1,2,2-trifluoroethane and the preferred mixture is an azeotropic one. In an example, a printed circuit board is cleaned of soldering flux by immersion in the boiling solvent mixture.
Patent GB-1307952-A (GB)
Title: Mandrels for winding packages of flexible material
IPC: B65H55/04
Filed: 1971-05-06
Abstract: 1307952 Packages WINDINGS Inc 6 May 1971 13502/71 Heading B8M [Also in Division D1] A yarn package is wound with a radial hole passing through it, half-way along its length, the internal end of the yarn being withdrawn through the hole substantially without twist.
Patent GB-1317210-A (GB)
Title: Reduction of thebaine
IPC: C07D489/02
Filed: 1970-12-11
Abstract: 1317210 8,14-Dihydrothebaine MACFARLAN SMITH Ltd 24 Nov 1971 [11 Dec 1970] 58926/70 Heading C2C 8,14-Dihydrothebaine is prepared by heating thebaine with at least one thermally decomposable compound selected from optionally substituted alkyl, aryl and aralkyl sulphonic acid hydrazides and disodium azodicarboxylate (the latter being used in the presence of a proton-supplying substance). It may subsequently be hydrolysed to give dihydrocodeinone.
Patent GB-1319114-A (GB)
Title: Microbiological method of preparing lipids
IPC: C12P7/64
Filed: 1970-11-04
Abstract: 1319114 Yeast &c. VSESOJUZNY NAUCHNOISSLEDOVATELSKY INSTITUT BIOSINTEZA BELKOVYKH VESCHESTV 4 Nov 1970 52401 /70 Heading C6F [Also in Division C5] A method of preparing a lipid comprises avokically cultivating lipid-producing microorganisms, particularly yeasts of the genus Candida, in a nutrient medium containing mineral salts as sources of nitrogen, phosphorus, potassium and magnesium, and a paraffinic hydrocarbon as a source of carbon, the quantity of paraffinic hydrocarbons not exceeding 75 per cent by volume, maintaining the ratio of nitrogen to carbon no lower than 1:75, and the ratio of phosphorus to carbon, calculating phosphorus as phosphorus pentexide, no lower than 1:60, and maintaining simultaneously a medium dilution co-efficient in the range of 0À5 to 0À07 per hour. The hydrocarbon may be a petroleum paraffin fraction or a synthetic paraffin. Lipids which contain up to 50% by weight phospho-lipids, up to 40 per cent free fatty acids and up to 10 per cent tri-glycerides are obtained when the amount of paraffinic hydrocarbon in the cultivation does not exceed 25 per cent by volume. N:C is from 1:5 to 1:20, P:C is from 1:15 to 1:30 and the medium dilution co-efficient is between 0À1 and 0À07 per hour. Lipids containing approximately up to 75 per cent of tri-glycerides, up to 9 per cent phospho-lipids and up to 5 per cent free fatty acids are obtained when the amount of paraffinic hydrocarbon in the cultivation does not exceed 50 per cent by volume, N:C is from 1:30 to 1:45, P:C is from 1:15 to 1:30 and the medium dilution co-efficient is between 0À1 and 0À07 per hour. Similarly, lipids which contain up to 50 per cent of free fatty acids and have only low contents of phospho-lipids and tri-glycerides are obtained when the amount of paraffinic hydrocarbon is in the range 50 to 70 per cent by volume, N:C is from 1:5 to 1:20, P:C is from 1:15 to 1:30 and the dilution co-efficient is between 0À5 and 0À07 per hour. Examples are directed to the cultivation of Candida tropicalis, Candida pelliculosa and Candida guilliermondii, respectively.
Patent GB-1323919-A (GB)
Title: Austenitic stainless steels
IPC: C22C38/38
Filed: 1970-12-29
Abstract: 1323919 Austenitic stainless steel NISSHIN STEEL CO Ltd 29 Dec 1970 27 Dec 1969 30 April 1970] 61679/70 Heading C7A An austenitic stainless steel has the following percentage composition:- The Cu content is preferably 2À0 - 4À0.