baber/WOPTO huggingface dataset:
Patent GB-1370808-A (GB)
Title: Signal amplifier including a protective circuit
IPC: H03F1/52
Filed: 1971-11-12
Abstract: 1370808 Protecting signal amplifiers PIONEER ELECTRONIC CORP 12 Nov 1971 [16 Nov 1970] 52770/71 Heading H3T [Also in Division H2] In a signal amplifier 1 provided with a protective circuit 2 for use in protecting the output stage of the amplifier and/or its load impedance from an abnormal condition represented by a difference in the form of the input signal and the output signal of the amplifier, the protective circuit includes a differential amplifier 21 arranged to produce an output control signal in response to a difference between signals applied to its inputs and an attenuation circuit 22 having an attenuation factor of the same magnitude as the amplification factor of the signal amplifier 1, the input of the signal amplifier is connected to one input of the differential amplifier, the input of the attenuation circuit is connected to the output of the signal amplifier and the output of the attenuation circuit is connected to the other input of the differential amplifier so that the differential amplifier produces the output control signal in response to an abnormal condition. The input and output signals of the amplifier 1 are in phase and as the attenuation factor of the attenuator 22 is of the same magnitude as the amplification factor of the amplifier 1 the differential amplifier 21 is operated in a balanced state. If either output voltage 5 or 6 falls below a predetermined value the switching circuit 23 is operated to open contact Y. If the D.C. potential of the output line L 2  varies due to some defect of the amplifier 1, this causes unbalance of the differential amplifier 1 and operation of the switching circuit 23 so as to open contact Y and protect the loud-speaker SP from the defect of the amplifier 1. Similarly the amplifier 1 is protected against short circuit of the loud-speaker terminals which would cause unbalance of the differential amplifier 21 and opening of the contact Y. When the switching circuit 23 is operated it returns to its unoperated state after a few seconds so that contact Y is again closed. If the differential amplifier 21 is still in an unbalanced state the contact Y is opened again. Also when an excessive input occurs at L 1  such that the output signal would be clipped the differential amplifier 21 again goes into the unbalanced state and the protective circuit 2 operates as above. The protective circuit may operate to disconnect the power source.
Patent GB-1163168-A (GB)
Title: Means for the Local Heating of an Animate or Inanimate Object
IPC: A61B18/20
Filed: 1967-11-21
Abstract: 1,163,168. Lasers. L'AIR LIQUIDE SOC. ANON. POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE. 21 Nov., 1967 [22 Nov., 1966], No. 53024/67. Heading H1C. [Also in Division G2] A laser beam is focused to a spot having a controllable size, by means of an optical system having a continuously variable focal length providing a ratio between extreme focal lengths of at least 1 to 5. The beam may be used for welding, drilling, cutting or machining materials, or for micro-surgery. The output from laser 18 is directed through a sighting device, when mirrors 24, 26 are retracted, and passes through optical system 20 which focuses it on to workpiece 16. The system can be adjusted, when the laser is switched off, by arranging mirrors 24, 26 as shown. Partially transparent mirror 26 reflects light from source 30 on to the workpiece which can then be inspected through viewing device 36, 38, 40, 42. Source 30, preferably produces radiation having the same wavelength as the laser beam. The optical system 20 preferably comprises a fixed convergent lens, a movable divergent lens and a movable convergent lens. The ratio of the enlargement produced by each movable lens in its extreme positions is preferably between 2 and 3 to 1, giving an overall ratio of enlargements of about 6 to 1. A further fixed convergent lens may be provided at the output end of the system. The lenses should be made of a glass resistant to the effects of laser radiation and are preferably uncemented elements separated by air gaps. The working distance of the system may be fixed regardless of the positions of the movable lenses.
Patent GB-1278113-A (GB)
Title: Preparation of a cellular material rich in protein
IPC: C12N1/14
Filed: 1969-10-29
Abstract: 1278113 Cultivating Eumycetes on mixed mono- and di-carbotylic acids STAMICARBON NV 29 Oct 1969 [31 Oct 1968] 53027/69 Heading C6F In a process of preparing protein, protein-rich Eumycetes are cultivated under aerobic conditions in a liquid culture medium containing a mixture of aliphatic mono- and dicarboxylic acids having less than 8 carbon atoms per molecule and maintained at a pH between 5.5 and 8, and the protein-rich cellular material obtained is isolated. The following species are particularly mentioned: Candida lipolytica, Candida brumptii, Candida tropicalis, Candida utilis, Trichosporon cutaneum and Oospora lactis. Certain other genera than these also receive mention. The mixture of acids may be that obtained in the wash water derived from the washings of the crude final product of the preparation of cyclohexanone from cyclohexane or cyclohexanol. Such a mixture may include acetic, butyric and caproic acids, e-hydroxy caproic acid, formic, propionic and valeric acids, γ-valero-lactene, and adipic, glutaric, oxalic and succinic acids. The culture medium is supplemented during continuous cultivation with a readily available carbon source (glucose for Candida, acetic acid for Trichosporon) providing 1-10 mg carbon per gram of carbon contained in the mono- and dicarboxylic carbon source.
Patent GB-1166457-A (GB)
Title: Collapsible Boat
Inventor: MARSHALL ROBERT SWINBURN
IPC: B63B7/06
Filed: 1965-12-21
Abstract: 1,166,457. Collapsible boats. NOVOTEC RESEARCH Ltd. 14 Dec., 1966 [21 Dec., 1965], No. 54073/65. Heading B7A. A collapsible boat comprises a quadrilateral bottom panel 1, spaced opposed quadrilateral side panels 2 and end panels 3, watertight flexible connections 6 between the bottom. panel and the side and end panels, and triangular panels 4 connected between the side panels and end panels at each corner of the bottom panel by means of watertight flexible connections so that the side panels and end panels may be folded inwards to overlie the bottom panel. One or more removable thwarts 28, each of which includes a rigid member 29 having at each end hinged portions 30 terminating in a U-shaped clamp 31, maintain the opposed side panels in spaced relationship. In preferred embodiments the bottom panel is rectangular and the side panels are trapezium shaped.
Patent GB-1118060-A (GB)
Title: Load balancing system for hydraulic jack
IPC: F15B11/036
Filed: 1966-12-02
Abstract: 1,118,060. Hydraulic jacks; counterbalancing loads. CATERPILLAR TRACTOR CO. 2 Dec., 1966 [11 Jan., 1966], No. 54101/66. Headings B8B and B8J. Means is provided to balance at least a portion of the weight of a machine component (not shown) actuated by a double acting hydraulic jack 10 with,a main cylinder 12, piston 26 and rod 14. The rod 14 has bore 34 opening at its inner end, a stationary ring member 38 engaging the wall of the bore 34 and defining one end of an expansible chamber within the rod bore 34 supplied with pressure fluid through a tube 36, thereby tending to extend the rod 14 relative to the cylinder 12. Normal operation of the jack 10 is provided conventionally by directing fluid under pressure through either port 46 or port 48 to extend or retract the rod 14. The jack 10 is connected between a vehicle and a component to be adjusted and when fluid pressure is directed through the tube 36 from an external source such as an accumulator, sufficient pressure may be introduced into the bore 34 to compensate or offset the weight of the component. Fluid pressure introduced through the port 46 is thus utilized entirely for the manipulation of the net payload upon extension of the jack. Fig. 2 (not shown) illustrates a modification wherein the jack is retracted to manipulate the load. Fig. 3 shows an hydraulic circuit adapted to supply fluid pressure from a conventional accumulator 55 to the expansible chamber within the rod bore 34 (or (34<SP>1</SP>) of the modified embodiment). The accumulator 55 is initially charged in a conventional manner by alternately directing fluid from an hydraulic jack circuit (not shown) to ports 46 and 48. Extension of the rod 14 draws fluid from a reservoir 65 through a check valve 73 into rod bore chamber 34, while reverse movement of the rod 14 directs such fluid back through line 59 and check valve 75 into the accumulator 55 which has a piston 56 and a supply of compressible fluid 57. At a predetermined pressure control valve 63 opens and remains open while the pressure in the accumulator is in the operative range. A safety valve 69 has a spool 77 normally urged to open the valve 69 under the action of a spring 80, but when the engine of the vehicle is running lubricating oil pressure therefrom introduced through a conduit 82 keeps the valve 69 closed.
Patent GB-1552890-A (GB)
Title: Pressure-gas filled ceramic insulator
IPC: H01B17/36
Filed: 1977-12-30
Abstract: SF6, in particular, is provided as the compressed-gas filling for the sleeve insulator. In order to keep the consequences of any bursting which may occur as slight as possible, an electrically insulating, gas-permeable sleeve (14) is provided inside the sleeve insulator (4). In the event of the sleeve insulator (4) bursting, this gas-permeable sleeve (14) ensures that there is a pressure drop between it and the sleeve insulator (4) with respect to the remaining pressure in the installation. In consequence, it is possible to limit effectively fractured parts being flung away. Further braking of the fractured parts can be achieved by point-by-point attachment of the gas-permeable sleeve (14) to the sleeve insulator (4). A weak point (42) can additionally be provided. A pressure-relief valve (11, 11', 11'') can prevent bursting in the event of a slow pressure rise. <IMAGE>
Patent GB-1494218-A (GB)
Title: Electrophotographic copier
IPC: G03G15/16
Filed: 1974-12-18
Abstract: 1494218 Electro-photography ITEK CORP 18 Dec 1974 [2 Jan 1974] 54776/74 Heading G2H Toner images are transferred from drum 10 to belt 61, are heated by radiant energy to a tacky condition and are transferred to and fixed on copy material 72, the belt and copy material remaining in contact after transfer so that heat from the belt is passed to the paper to assist fixing. The belt may be surfaced with silicone rubber or a fluorelastomer, and have a polyimide substrate with a reflecting layer of aluminium. Alternatively, the belt may be transparent.
Patent GB-1182520-A (GB)
Title: Airless Dual Component Spray Gun
IPC: B29B7/74
Filed: 1968-11-19
Abstract: 1,182,520. Spray producers; mixing flowing liquids. DEVILBISS CO. 19 Nov., 1968 [8 April, 1968], No. 54837/68. Headings B1C and B2F. A spray gun comprises a body 12 having one solvent 66 and two fluid component passages 1, 2, a spray head 22 attached to the body, and a spray nozzle 24 attached to the spray head, the spray head comprising a replaceable valve plate 92 having a solvent check valve covering the solvent passage and two fluid check valves covering the two fluid passages, a mixing head 94 (see also Figs. 6-8, not shown) attached to the body and lying against the valve plate, said mixing head having a solvent chamber (102) adapted to receive solvent through the solvent check valve 92 and two fluid component chambers (104, 106) adapted to receive fluid components through the fluid check valves, means in the mixing head for mixing the fluid components and delivering the mixture to the spray nozzle, and means for cleaning said fluid component chambers, mixing means, delivery means and nozzle with pressurized solvent. The valve plate may be a sheet of resilient plastic, e.g. polytetrafluoroethylene, with three flexible flaps cut in it, and holes co-operating with dowels 90 to ensure correct alignment. The chambers may be formed by three blind bores in the head, the fluid chambers being connected by a milled channel (108) which is perpendicularly bisected by a further milled channel (114) connecting with the outlet (112). The solvent chamber may communicate with one of the fluid chambers by a further milled channel (116), whereby the fluid chambers and spray head may be flushed with solvent. Mixing is effected by turbulence.
Patent GB-1484734-A (GB)
Title: Camera
IPC: G03B17/50
Filed: 1974-12-19
Abstract: 1484734 Cameras POLAROID CORP 19 Dec 1974 [20 Dec 1973] 55063/74 Heading G2A The film transport motor 82 of a camera of the self-processing reflex type is coupled to the processing rollers 56, 57 by an endless flexible belt 107 provided with a cam 121, the reflex mirror 67 being moved from a taking position to a receiving position by engagement of the cam, as the belt is rotated, with an extension 120 connected to the reflex mirror. A spring 83 biases the mirror to the taking position after release of a solenoid operated catch (SK3) Fig. 3 (not shown) by the depression of the camera shutter button. De-energization of the motor 82 after an exposed film unit has been advanced into engagement with the processing rollers is effected by the cam 121 contacting a switch S 4 . An integrated circuit Fig. 6 (not shown) synchronizes the operation of the shutter mechanism, the reflex mirror and the film transport motor.
Patent GB-1209158-A (GB)
Title: Device for testing experimental circuits
Inventor: GOLD PERCY ERNIE
IPC: H05K7/10
Filed: 1967-12-05
Abstract: 1,209,158. Circuit assemblies. HOWARD ELECTRONIC INDUSTRIES Ltd. 5 Dec., 1968 [5 Dec., 1967], No. 55334/67. Heading H1R. [Also in Division H2] A circuit board 10 is provided with a plurality of integrated circuit receiving stations 16 each of which includes a removable carrier on which an integrated circuit is mounted and a plurality of electrical connectors which are connected via conductors to the terminals of the respective integrated circuit. The design of each station 16 is dependent on the form of the integrated circuit module and in the case of a dual-in-type 16a, Fig. 3 (not shown), and Fig. 2 a rectangular insulating plate 20 is provided with eight pairs of apertures 21 arranged in the centre of the plate 20 which correspond to the pairs of terminals of the modules. Each aperture 21 is associated with a spring 22 held in position by a block 23 of insulating material mounted on the rear of plate 20. The terminals of the integrated circuit module are inserted through the holes 21 and gripped by legs 22a of the springs 22 pressing against block 23. Legs 22c of the spring 22 pass through a slot in the carrier 20 and are soldered to conductors 25 which each connect with one of a row of sockets 26. The springs are coated with gold. To enable more than one wire to be connected to a single terminal 26 multi-connection devices 27 are provided on base 10 comprising a central conductive stud surrounded by a resilient grommet which holds the stud in an aperture in the base 10. The sockets 26 may be replaced by multiple connection devices, Fig. 4 (not shown), in which dovetail, circular or rectangular metal studs or bars provided with grooves are embedded in a block of insulating material so that connecting wires can be pushed down between the studs and insulating material. Station 16b for mounting Transistor-Outline series modules does not have springs 22 associated with each of the apertures 21 but a simple socket 21a is inserted in each aperture. Flat pack integrated circuit modules, Fig. 6 (not shown), having pairs of coplanar terminals extending from opposite sides of the module are positioned in an aperture 39, Fig. 5, of a carrier carrying conductors 38 connecting with sockets 26 so that the terminals of the module are in register with the conductors 38. The terminals and conductors 38 are held together by a clamp, Fig. 7 (not shown), provided with catches which engage in apertures 43. All the stations are held in position on base 10 by screws 18 so that they may be interchanged.
Patent GB-1159610-A (GB)
Title: Subscription Television Receiver
IPC: G07F7/00
Filed: 1966-12-09
Abstract: 1,159,610. Token-freed apparatus. ZENITH RADIO CORP. 9 Dec., 1966 [15 Dec., 1965], No. 55373/66. Heading G4V. [Also in Divisions H1 and H4] The invention relates to a receiver for a secret television system in which proper decoding depends upon establishing a series of interconnections between input and output terminals, the pattern of interconnections being different for each programme to be received. In accordance with the invention the pattern of interconnections for a particular programme is provided by means of ticket 65 arranged as illustrated in Figs. 4-6 whereby the lower portion, which is finally folded in concertina fashion, carries a series of aluminium patches 69-69e each perforated with a pattern of holes arranged in two rows. The ticket is inserted in an apparatus, Fig. 8, by way of a slot 82a, and upon operation of a control (not shown) to rotate a shaft 53 a toggle mechanism 135, 137, 138 displaces an assembly of pointed contacts 91 to the right and causes the contacts to pierce and pass through the lower portion of the ticket. The contacts comprise the input and output terminals of the decoding system and are disposed in two rows corresponding to the rows of holes in the aluminium patches. Where a hole is omitted from a row, contact is established between a patch and a contact. Thus, considering the contacts as numbered from the left in Fig. 5 (and allowing for the concertina fold), patch 69a establishes connection between the fourth terminal in the upper row and the fifth terminal in the lower row, patch 69b establishes connection between the third terminal in the upper row and the fourth in the lower, and so on for the remaining patches. The slot 82a is enclosed by a sliding cover 148 which coacts with a ball and cam mechanism 151, 132 on shaft 53 in such manner that (1) the contact assembly must be withdrawn (to the left-hand position in Fig. 8) before the cover may be slid back to insert or withdraw a card and (2) the shaft cannot be rotated with the cover slid back to expose the slot. Payment for reception of television programmes provided by the secret system is made on the basis of issued cards with a reduction allowed for returned unused cards. If a card is returned which has been used, this is apparent by the perforations made when the contacts pierce the card. The card after folding in concertina fashion is heatseal bonded so that any tampering with the card to extract the information about the circuit interconnection also becomes apparent.
Patent GB-1379739-A (GB)
Title: Dry cleaning of textiles
Inventor: NEEL JEAN
IPC: C11D7/32
Filed: 1971-12-01
Abstract: 1379739 Washing articles with organic solvent PROGIL 1 Dec 1971 [17 Dec 1970] 55801/71 Heading D1P A method of washing solid articles with an organic solvent is characterised in that the solvent contains in solution a primary or secondary mono- or di-amide of an aliphatic dicarboxylic acid or anhydride wherein one of the carbon atoms in the chain connecting the two carboxyl groups bears an alkyl or alkenyl radical having a chain of at least 6 carbon atoms, the amide being derived from a polyamide containing less carbon atoms than said radical. The basic acid or anhydride may be e.g. malonic, succinic, glutaric or adipic acid or anhydride. The polyamide may be a polyethylene-polyamine containing 2-6 amine groups. One or more N atoms of the amide may bear a hydrocarbon radical, an acyl group, an arylsulphonic radical or an alkoxy or polyoxyalkylene group, and one or more of any amine groups of the amide may be blocked by an acid. Typically the amide is a succinimide having a 64 carbon atom polyisobutylene chain and the imide derives from tetraethylene pentamine. The solvent is e.g. tri- or per-chloroethylene optionally containing small amounts of water and/or surfactant.
Patent GB-1374292-A (GB)
Title: Device for the separation of solids from liquids in a pipeline
IPC: B01D35/02
Filed: 1971-12-01
Abstract: 1374292 Filter in pipeline SIEMENS AG 1 Dec 1971 [24 Dec 1970] 55848/71 Heading B1D An outward flow filtering screen 2 is located in a pipe section 1 and tapers towards an outlet 3 through which solids are discharged, the main liquid flow being from left to right and through the screen, and one or more helical webs 5 project outwards from the outside of the screen so that fibres caught in screen perforations 6 (Fig. 3) are prevented from entangling together. Valves 8 and 9 are capable of cleaning the screen by creating a vortex flow across its inner surface. A similar effect may be created by a downstream valve (10) and tangential cleaning liquid inlets (11) in Fig. 4 (not shown). In Fig. 5 (not shown) a helical spray pipe (12) encloses the screen and directs cleaning liquid on to its exterior, possibly in addition to the valves described above. Pipe (12) is open at both ends, some wash liquid being discharged at (14). The various cleaning actions may be performed intermittently or continuously.
Patent GB-1152137-A (GB)
Title: Process for the Production of New Thermoplastic Synthetic Materials Based on Polycarbonates
Inventor: SCHNELL HERMANN
IPC: C08F283/01
Filed: 1967-12-08
Abstract: 1,152,137. Grafted polycarbonates. FARBENFABRIKEN BAYER A.G. 8 Dec., 1967 [10 Dec., 1966], No. 55979/67. Heading C3G. A polymeric thermoplastic compound comprises radicals of a polymer of a radical-polymerizable olefinically unsaturated compound grafted on to the unsaturated polymerizable groups present in a substantially linear polycarbonate. The grafted polycarbonate is prepared by grafting the olefinic compound on to the polycarbonate dissolved in an inert solvent or dispersed in a non-solvent. Suitable polycarbonates include those derived from aromatic dihydroxy compounds nuclearly substituted with at least one alkenyl group, those derived from bis (hydroxyphenyl) alkanes and those derived from aliphatic dihydroxy compounds, e.g. butene-diols. The graft polymerization may be initiated by a free radical catalyst or irradiation. In Examples 1 to 11 a polycarbonate derived from 2,2-(4,41-dihydroxydiphenyl)- propane and 2,2-(3,31-diallyl-4,4<SP>1</SP>-dihydroxydiphenyl)-propane is dissolved in methylene chloride and emulsified in an aqueous medium together with (a) styrene, (b) a mixture of styrene with acrylonitrile or maleic acid, (c) vinyl acetate or (d) a mixture of ethyl acrylate and acrylamide, the graft polymerization then being carried out using potassium persulphate or potassium persulphate-sodium thiosulphate as initiator. The aforementioned polycarbonate solution is dispersed in Example 12 in an aqueous medium containing polyvinyl acetate, Mg(OH) 2 , styrene, acrylonitrile and benzoyl peroxide to produce the graft polymer. The same polycarbonate is dissolved in ethylene chloride in Example 13 and mixed with styrene and benzoyl peroxide whereas in Examples 14 and 15 it is dissolved in chlorobenzene and mixed with azodiiso-butyronitrile and methyl methacrylate or a styrene-acrylonitrile mixture.
Patent GB-1173930-A (GB)
Title: Steam Turbines
Inventor: WOOD MICHAEL ROGER
IPC: F01D25/32
Filed: 1967-12-08
Abstract: 1,173,930. Steamturbines. ENGLISH ELECTRIC CO. Ltd. Dec.6, 1968 [Dec. 8, 1967], No.56041/67. Heading F1T. In a steam turbine the blade tips of at least the penultimate low-pressure stage rotor blades 1 protrude into an annular cavity 2 in the cylinder casing 3 which collects condensation water droplets thrown off from the blades 1. The wall 4 of the cavity 2 downstream of the blades 1 curves towards the blades and has a lip 5 to prevent collected water from re-entering the main steam flow. The water is drawn off through a passage 6 to a region of lower pressure, such as a feedwater heater. The construction may be combined with the condensation water collecting arrangement described in Specification 56040/67 wherein slots and passages are provided in the turbine guide vanes.