baber/WOPTO huggingface dataset:
Patent GB-1348397-A (GB)
Title: Balanced type amplifier circuit
IPC: H03G11/00
Filed: 1971-11-11
Abstract: 1348397 Transistor amplifying circuits IWATSU ELECTRIC CO Ltd 11 Nov 1971 [12 Nov 1970 23 Sept 1971] 52437/71 Heading H3T In a balanced amplifier which includes a pair of transistors connected to two input terminals respectively, a comparator is connected to either the input or output of the amplifier; the output of the comparator being connected to a bias source the output of which is connected to the amplifier in such a manner as to prevent saturation of the transistors if an input signal exceeding a predetermined value is applied thereto. In a first embodiment the bias occurring across resistor R15 in the common emitter circuit of amplifier transistors T5, T6 is applied to the base of transistor T7 which with transistor T8 forms a long-tailed pair: the collector potential of transistor T7 is applied over an emitterfollower T9 to provide the collector supply for amplifier transistors T1, T2 which is thereby reduced if either of the transistors T5, T6 is driven into saturation. Diodes (D1, D2, Fig. 6, not shown) may be connected in series with the emitter circuit resistors of the output transistors (T5, T6) or alternatively these resistors may be omitted (Fig. 7, not shown). In another embodiment, the bias for the collector-potential controlling amplifier is derived from the common point of a pair of diodes (D3, D4, Fig. 9, not shown) connected in reverse polarity in series across the amplifier output. In yet another embodiment the base potentials of amplifier transistors T3, T4, Fig. 10, are applied to transistors T12, T13 respectively, across the collector circuits of which are connected diodes D5, D6 in series. The potential at the common point of these diodes is applied via an amplifier D to form a base bias for the amplifier transistors T3, T4.
Patent GB-1202378-A (GB)
Title: Milk coagulating enzyme complex and process for preparation thereof
IPC: C12N9/56
Filed: 1967-11-20
Abstract: 1,202,378. Cheese. JOHN LABATT Ltd. 20 Nov., 1967 [1 Dec., 1966], No. 52738/67. Heading A2B. [Also in Division C3] Cheese is made from milk by the addition of a bacterial enzyme complex (see Division C3) containing acid and neutral peptidases but free from alkaline peptidase activity.
Patent GB-1527499-A (GB)
Title: Methods of removal of alkali and alkaline earth metals from light metal melts
IPC: C22B9/02
Filed: 1975-12-24
Abstract: 1527499 Refining light metals SWISS ALUMINIUM Ltd 24 Dec 1975 [24 April 1975] 52905/75 Heading B1D [Also in Division C7] Light metals, particularly Al alloys are refined of alkali and alkaline-earth metal impurities such as Na, Ca, Li, by filtering the contaminated melt through a bed of particulate, mechanically resistant inert ceramic carrier material coated with 0.1- 10nm thick carbon. The passage of a non reactive gas such as nitrogen argon or other inert gases separately or in mixtures in counterflow to the metal improves the purification. The carrier material may be corundum, magnetite, zirconium oxide or silicate, basalt or bausite with a density of more than 2.5 g/c<SP>3</SP>, and should be within 0.5-25 cm in diameter. An addition of 1-32 by volume of an aliphatic chloro fluoro hydrocarbon to the counterflow gas may be made.
Patent GB-1474716-A (GB)
Title: Ion-selective electrodes
IPC: G01N27/30
Filed: 1974-12-10
Abstract: 1474716 Ion selective membrane MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 10 Dec 1974 [10 Dec 1973(4)] 53434/74 Heading G1N A ion selective membrane is made by coating particles of AgCl, AgBr, or AgI (selective for Cl, Br, and I respectively) with a layer of Ag 2  S by reaction with a solution of Na 2 S, and compressing the coated particles. The particles are prepared by precipitation, and are coated by adding a solution of Na 2 S to the agitated suspension of the particles. Preferably the coated particles are etched by a solution of HNO 3 , crushed to a finer particle size, and recoated with Ag 2 S. The surface of the membrane to be exposed to a sample solution is polished and ultrasonically cleared in an alcohol solution. The opposite surface is coated with a conductive film of gold, silver, copper, or nickel by vacuum deposition. Measurements may be made in conjunction with a saturated calomel reference electrode.
Patent GB-1446918-A (GB)
Title: Fluid filters
IPC: B01D25/00
Filed: 1973-11-20
Abstract: 1446918 Making filters ROBERT BOSCH GmbH 20 Nov 1973 [21 Nov 1972] 53754/73 Heading B1D A method of making a filter comprises winding filter material (e.g. corrugated paper) around tube 13 to form a filter element (e.g. of circular or oval cross-section), applying a thermoplastics adhesive band 18 around the element and preferably a thermoplastics adhesive band 19 along the free end of the filtering material, compressing the bands 18, 19 by cooled moulding jaws and inserting the element into a heated housing component 22 such that the band 18 softens and, when the housing component cools, forms a tight seal between the element and housing component. The filter material to be wound may be in the form of a doubled over web or two superimposed bonded webs. Adhesive may be applied to the filter material during winding to adhere adjacent turns of filter material.
Patent GB-537938-A (GB)
Abstract: 537,938. Power measurements. WESTON ELECTRICAL INSTRUMENT CORPORATION. April 8, 1940, No. 6350. Convention date, April 8, 1939. [Class 37] [Also in Group XXXV] Thermal converters for producing D.C. voltages proportional to the product of two current values, particularly to the power or reactive volt-amperes, are arranged so that the current components flow through and directly heat the thermo-couples. In the thermal wattmeter shown in Fig. 1, four thermocouples a, b, c, d, are welded together in a bridge circuit. One pair of diametrically opposite points is supplied from the secondary winding 2 of a current transformer, of which the primary winding 1 is in the A.C. line L. The other pair of diametrically opposite points is supplied through resistances 10 from the secondary winding 4 of a potential transformer having its primary winding 3 connected across the mains L. A millivoltmeter is connected across centre taps on the secondary winding 2 4 and indicates power. Reactive volt-amperes may be measured by exciting the potential system 90 degrees out of phase. The core 5 of the current transformer is arranged to become saturated at about three times normal load to prevent damage to the thermo-couples at over loads. In a modification, Fig. 4, two pairs of oppositely-arranged thermo-couples 13, 14, 15, 16 are supplied by two secondary windings, 17, 18 of the current transformer as shown, the secondary winding 20 of the potential transformer being connected between centre taps on the windings 17, 18. The D.C. instrument 11 is connected between the junctions of the pairs of thermo-couples. In a further modification, Fig. 5, thermo-couples 23, 24 of T-design are substituted for the pairs 13, 14, 15, 16. For measuring power in a three-phase circuit, three such wattmeters are connected in the usual way and the D.C. circuits are connected in series. The D.C. voltage may energize control or recording apparatus. Specification 2948/04, [Class 37], is referred to.
Patent GB-1294694-A (GB)
Title: Improvements in or relating to the electrolytic refining of copper
Inventor: GREGORY PETER
IPC: C25C1/12
Filed: 1969-11-04
Abstract: 1294694 Refining of copper BRITISH INSULATED CALLENDERS CABLES Ltd 19 April 1971 [4 Nov 1969] 53938/69 Heading C7B A process of electrolytically refining copper comprises electro-depositing copper on to a rolled sheet of copper so forming a plate thicker than a cathode starter, hot or cold-rolling the plate to reduce its thickness to that of a cathode starter, cutting the plate to form a cathode starter, immersing the cathode starter in an electrolyte and electro-depositing copper on to the cathode starter. The resulting cathode may then be rolled and a new cathode starter may be cut from it.
Patent GB-1162389-A (GB)
Title: Improvements in or relating to Processes of Making Steels Having Improved Machining Properties
IPC: C22B9/18
Filed: 1966-12-02
Abstract: 1,162,389. Casting processes. BÍHLER & CO. A.G. GEB. 2 Dec., 1966 [3 Dec., 1965], No. 54097/66. Heading B3F. [Also in Division C7] A process for producing steel ingots having Ýmproved machining properties in which a steel containing at least one alloying element, e.g. sulphur, which improves the machinability and which is in solution when the steel is molten is subjected to electro-slag zone refining to produce an ingot and in which the slag used in the refining contains 10-40% Al 2 O 3 , 10- 50% SiO 2 , up to 40% oxides of alkaline earth metals and/or up to 70% CaF 2 , and less than 10% impurities, provided that in the presence of oxides of alkaline earth metals the SiO 2  content is at least 1À1 times the content of the oxides. In addition, up to 40% TiO 2  may also be included in the slag. Examples of particular slag compositions are given in the Specification.
Patent GB-1170949-A (GB)
Title: Warning Device for Hydraulic Braking Systems.
Inventor: PALAZZI IMPERO
IPC: G01F23/18
Filed: 1966-12-05
Abstract: 1,170, 949. Indicating liquid levels. I. PALAZZI. Dec.5, 1966 [Dec. 3, 1965; June 18, 1966], No. 54388/66. Heading G1H. [Also in Division F2] A warning device for indicating a lowering of the fluid level in a hydraulic brake fluid circuit below a predetermined minimum level comprises a fluid level indication such as a float 13 or a bellows fitted to the brake fluid supply tank, and arranged to operate a warning signal means 16, 17 connected in parallel electrical circuits with an ignitionkey switch and a foot brake operated switch. The cap 9 of a supply tank is provided with a hole through which passes a rod 12 connected to the float at the other end, slidably mounted on the rod 12 is a metal ball 17. As the float falls due to lowering of the liquid level, the ball 17 also falls until on reaching a predetermined liquid level the ball 17 contacts metal half-rings 15 connected to conductors 16, 16<SP>1</SP> and so operates a warning signal. In another embodiment the level is indicated by the lengthening of a bellows Fig. 4 (not shown). The warning signal may be connected in circuit with the ignition light so that each time the engine of the car is started the signal such as a warning light is tested and if it is faulty a brighter and different colour light shows.
Patent GB-1167519-A (GB)
Title: Novel Laminations
IPC: G03C8/42
Filed: 1966-12-06
Abstract: 1,167,519. Light polarizing laminate. INTERNATIONAL POLAROID CORP. 6 Dec., 1966 [10 Dec., 1965], No. 54590/66. Addition to 1,151,772. Heading B5N. [Also in Division G2] A laminate comprises a substrate having a generally planar information-bearing surface laminated to a substantially transparent sheetlike element comprising an oriented polymeric material, or oriented glass, at least a portion of which has been rendered light-polarizing by dyeing with (a) a mixture of a positive dichroic dye and a differently coloured negative dichroic dye or (b) a mixture of a positive dichroic dye and a differently coloured isotropic dye or (c) a mixture of a negative dichroic dye and a differently coloured isotropic dye or (d) a double dichroic dye. The oriented polymeric material may be polyvinyl alcohol, partially dehydrated polyvinyl alcohol, a vinyl alcohol copolymer, hydrolysed cellulose acetate or blends of polyvinyl alcohol with polyvinyl pyridine. Preferably the element has a dyed stripe. The substrate may be of metal, paper or wood and may comprise a photograph, e.g. a silver transfer image. The substrate and the element may be bonded by a pressure-sensitive butadiene-acrylonitrile copolymer, an epoxy resin or a cyanoacrylate polymer. A further transparent layer capable of embossment, e.g. of polyvinyl chloride, a copolymer of vinyl chloride with vinyl acetate or a blend of polyvinyl chloride with polyvinyl acetate may be bonded to the free surface of the oriented element. Examples are given.
Patent GB-1271130-A (GB)
Title: Improvements in air pumps
IPC: A01K63/04
Filed: 1969-11-11
Abstract: 1,271,130. Valves. STERNCO INDUSTRIES Inc. 11 Nov., 1969 [15 April, 1969], No. 55081/69. Heading F2V. [Also in Divisions F1 and H2] An air pump comprises a variable volume pumping chamber 58 having inlet and outlet ports 70, 71 controlled by a resilient valve disc 20. The valve disc 20 is covered by a chassis 17 provided with inlet and outlet passages 66, 67 and has slots 60, 61 which are laterally displaced with respect to the inlet passage 66 and outlet port 71, whereby flexing of the valve disc to open the slots has to occur before communication is established between the ports 70, 71 and their respective passages 66, 67. A ring 22 having a bayonet lock connection with the chassis 17 clamps the valve disc 20 between the chassis and a housing 21a.
Patent GB-1406554-A (GB)
Title: Method and apparatus for multipolar magnetization of a flexible sheet
IPC: H01F13/00
Filed: 1973-11-29
Abstract: 1406554 Electromagnets; magnetization YAMAUCHI GOMU KOGYO KK 29 Nov 1973 [7 Dec 1972] 55458/73 Heading H1P Multipolar magnetizing apparatus comprises a cylindrical magnetically permeable body 13 having a longitudinal gap 12 thereon, of nickel, iron, silicon steel, iron, carbon steel, nickel, cobalt or highly permeable alloy, wound with a conductor 14 to develop opposed magnetic poles across the gap; the upper surfaces 15a, 16a of which are smoothed and the opposing faces of which are tapered. A flexible sheet 11 of material for multipolar magnetization, e.g. of powdered barium ferrite in synthetic rubber or synthetic resin of equivalent widths is drawn continuously in a direction normal to the gap, while the coil is energized by alternating or pulsating direct current to impose permanent magnetization on the sheet in alternate polarities lateral thereof. In modifications (Fig. 4, not shown) the permeable body may be rectangular with a continuous conductor wound on the opposed arms or (Fig. 5, not shown) the gap may be filled with non-magnetic material, e.g. synthetic resin, aluminium, or wood. It is shown that the magnetically attractive force of the sheet is a function of the frequency of energization (Fig. 6, not shown), of the speed of traverse (Fig. 7, not shown), of the gap width (Fig. 8, not shown); and that the interpolar space is a function of the magnetization frequency or pulse width and spacing (Figs. 9, 10, not shown) or of the speed of traverse (Fig. 11, not shown).
Patent GB-1416779-A (GB)
Title: Automotive anti-syphon device
IPC: B60K15/04
Filed: 1973-12-01
Abstract: 1416779 Fuel tanks J A HEARN 11 March 1974 [1 Dec 1973] 55788/73 Heading B7H A device for preventing liquids being syphoned from a filler pipe of a vehicle petrol tank comprises a spring clip having arms 1 which diverge from a central web 2 and bear against the inner surface of the filler pipe 7 and a rigid gauge element 4 secured to the central web 2 to prevent a syphon pipe being passed through the filler pipe. In use the arms 1 are held in the closed position by a bracket (6) Fig. 2 (not shown) which is removed by a chord attached thereto after the device is inserted in the pipe.
Patent GB-558890-A (GB)
Abstract: 558,890. Photographing moving objects ; electric motor controllers. DEL RICCIO, L. May 22, 1942, No. 7011. [Class 98 (i)] [Also in Group XXXVII] Apparatus for regulating the speed of an electric motor, in particular one used for moving a film strip in a camera at the same speed as that of the image formed on it of a moving object, comprises two rheostats in series in the motor circuit, the first being manually adjustable and the second, which is of substantially lower resistance, being progressively adjusted in accordance with the passage of time by a clock mechanism. Further in a camera for photographing moving objects and in which the film is moved by an electric motor past a slit, the speed of the motor is progressively controlled in accordance with time by a clock mechanism operating a variable resistance in the motor circuit. The apparatus shown diagrammatically, which is intended for use on a racetrack, comprises a camera which is set up at the finish line 36 of the track, and in which the film is moved behind a slit 25 by a motor 10 at the same speed as that of the image formed on it, in order to obtain a sharp picture. In the circuit of the motor are resistances 12, 16 the first of which is set by adjusting an indicating needle 20 to indicate the estimated speed of the horses at the finishing line, for example 36 miles per hour, as shown. As the leading horse enters a measured furlong adjacent the finishing line it interrupts a light beam actuating a photo-electric cell 42 which starts a clockwork mechanism which progressively throws the resistance 16 into the circuit so decreasing the motor speed. When the horse reaches the end of the furlong it similarly causes a second cell 43 to stop the clockwork mechanism. The apparatus is so designed that, should the speed of the horse over the measured furlong have been 36 miles per hour, as previously estimated, the clockwork will, during the time taken by the horse to cover the furlong, have introduced an amount of the resistance 16 which reduces the speed of the motor to a point at which it moves the film across the slot at the same speed as that of the image of the horse. Should, however, the speed over the furlong be greater or less than 36 miles per hour the time taken, and hence the amount of resistance introduced during it, will be correspondingly less or greater, so that the final speed at which the film is driven is still equal to that of the image. The dial 22 indicating the speed of the horses which is used in adjusting the resistance 12, is interchangeable with others for different ratios of the speed of the image to that of the horses, that is for different ratios of the focal length of the objective to the distance of the camera from the track. An indicator 18 operated by the clock mechanism shows the time taken to cover the measured furlong and the corresponding speed.
Patent GB-562592-A (GB)
Abstract: 562,592. Fluid pressure servomotors and control systems. BRASSERT & CO., Ltd., H. A., and NISSIM, R. Dec. 18, 1942, No. 18022. Addition to 554,070. [Class 135] A mechanical movement varying with a, physical value acts through a system of levers of variable mechanical advantage to control the escape valve of the regulator claimed in the parent Specification. In the arrangement shown in Fig. 1, the needle valve 31 of the main regulator 32 is actuated by a diaphragm 30 subject to the pressures in chambers 25, 26 which are supplied with compressed air by a fan 22 through connections 23, 24, the connection 24 being provided with a shut-off cock 29. Air is vented from the chambers 25, 26 through pipes 27, 28 leading to nozzles 19 controlled by needle valves 17, 18. The valve 17. is carried by a lever 11 pivoted at 12 and subject to the controlling impulse at 10. The lever 11 acts through a ball 15 on an adjustable flexible arm 16 on a lever 13 pivoted at 14, adjustably loaded by a spring 21 and carrying the valve 18. In the arrangement shown in Fig. 2, a second diaphragm 44 subject to the pressures in the chambers 25. 26 reacts on the lever 13 to provide a follow-up action. In this form, the lever 11 is operated by a face cam on a rotary controlling shaft 37. In a modification of this form, the lever 11 is actuated by a centrifugal governor. In the form shown in Fig. 4, a centrifugal governor acts through the adjustable lever mechanism on the needle 47 of the main regulator and the follow-up action is obtained through a Bourdon tube 49 subject to the pressure in the control chamber. In another form controlling the supply of air to a furnace, both needles are carried by one of the levers and are actuated by a pair of diaphragms interconnected by the adjustable lever mechanism and subject to the pressure differentials across surface plates in two conduits supplying furnace with blast furnace gas and coke oven gas. In still another form a single pair of needle valve controls two main regulators, one of which is also under the control of a second controlling impulse.
Patent GB-1317697-A (GB)
Title: Covering of areas of the surface of a semiconductor body with a protective mask
IPC: G03F7/00
Filed: 1971-12-06
Abstract: 1317697 Semi-conductor devices SIEMENS AG 6 Dec 1971 [11 Dec 1970] 56471/71 Heading H1K A photolacquer mask is provided only on non-metallized surface areas of a semi-conductor body 1 carrying a metallisation pattern 2 by covering the entire surface with photolacquer 3 and exposing it non-selectively to light, the reflective surface of the metallization pattern 2 causing the light entering the photolacquer immediately above it to be multiply reflected through the photolacquer 3 to a sufficient extent to cause it to be rendered soluble in a developer. Above the non-metallized areas there are no multiple reflections and the photolacquer remains insoluble. The multiple reflections may be reinforced by the provision of a very thin, partially transparent reflective metal coating 4 on the photolacquer 3. The photolacquer mask as defined may be used in the consolidation of Cr metallization 2 by electrodeposition, e.g. on a Si or GaAs body 1 containing Schottky-gate field effect transistors. The invention also extends to cases in which the photolacquer mask is required to cover the metallization 2, leaving the non-metallized area uncovered. In these cases the photolacquer 3 is of the type which is rendered insoluble by exposure to light only where multiple reflections occur.
Patent GB-1202338-A (GB)
Title: Device for handling hoses
Inventor: RYNNING ROALD
IPC: F16L3/01
Filed: 1968-11-28
Abstract: 1,202,338. Cleaning tanks. BUTTERWORTH SYSTEM Inc. 28 Nov., 1968 [5 Dec., 1967], No. 56576/68. Heading A4F. [Also in Division B8] A device for hauling hoses, particularly intended for raising and lowering pressure hoses for cleaning oil tanks, comprises two circular discs 12, 13 having opposed peripheral grooves 75 and mounted on a mobile frame at between 15 and 25 degrees to each other, such that they almost touch at one circumferential point, this being the point at which the discs grip the hose and haul it when the discs are driven rotatably. The shaft 11 of one of the discs is driven either by hand or power and interengaging teeth 18 on the two discs cause the other disc to be driven. The frame on which the device is mounted comprises wheels at one end and screwed feet at the other end, a swivelling screwed hook depending from the frame being used to grip a part of the tank to be cleaned and the screwed feet being adjusted to lock the frame in position by reacting against the hook grip. A roller facilitates guiding of the hose into position between the discs and a further guide roller may be provided where the hose leaves the discs.
Patent GB-1180259-A (GB)
Title: Apparatus for the Collection and Logarithmic Measurement of Quantities of Charges Produced by an Ionization Chamber
Inventor: BURKHART ANDRE
IPC: G01T1/15
Filed: 1967-12-13
Abstract: 1,180,259. Measuring ionisation chamber charge. COMMISSARIAT A L'ENERGIE ATOMIQUE Dec.13, 1967 [Dec.13, 1966], No.56632/67. Headings G1A and G1U. The total charge produced in an ionisation chamber in response to a pulse of radiation is measured by transferring a substantial predetermined portion of the charge to a low-leakage capacitor and subsequently discharging the capacitor through a high resistance. The capacitor voltage is fed through a high impedance input e. g. an electrometer tube or a field effect transistor to a trigger circuit which produces a pulse when the capacitor voltage reaches a predetermined threshold. This pulse samples a saw-tooth voltage to pick-off a voltage proportional to the logarithm of the initial charge on the capacitor and this voltage is displayed on a log scale meter. The ionisation chamber and capacitor may be separate from the remainder of the apparatus so that one measuring unit may serve a plurality of ionisation chambers. The apparatus may be used to measure pulses from accelerators or X-ray generators or the decay of radio-elements or used in photometry.