baber/WOPTO huggingface dataset:
Patent GB-1142422-A (GB)
Title: Frequency modulation by input voltage
IPC: G01R19/22
Filed: 1967-09-14
Abstract: 1,142,422. Pulse modulation circuits. NETHERLANDS APPLIED SCIENTIFIC RESEARCH FOR INDUSTRY, TRADE & COMMERCE. 14 Sept., 1967 [15 Sept., 1966], No. 41928/67. Heading H4L. In a pulse frequency modulator the input signal is supplied via terminals 7, 8 to a chopper consisting of field effect transistors 1, 2 providing a square wave output with an amplitude proportional to the input voltage. The output of the chopper is amplified at B and supplied via an integrator E to control a Schmitt trigger F. Assuming that a positive current is flowing to the base of transistor 24, then the voltage on the emitter of transistor 26 will fall linearly with time until the lower triggering voltage level of the Schmitt trigger is reached and the collector of transistor 36 goes negative. This voltage is amplified at G (transistors 42, 44) and fed back via resistor 23 to the base of transistor 24 so that a negative current begins to flow towards the base and the output of the integrator E increases linearly until the upper triggering voltage level of the Schmitt trigger is reached and the collector of transistor 36 goes positive. This voltage is fed back via the resistor 23 as a positive voltage so that the cycle repeats, the frequency of the oscillations being dependent on the amplitude of the output of amplifier B. The transistors 1 and 2 are opened and closed alternately in opposition by signals derived from the collectors of transistors 42 and 44 respectively. A frequency detector H provides an adjustable direct voltage dependent on the output frequency which is fed back via resistor 5 to the transistor 2 to compensate for non- linearity caused by capacitive inequality of the transistors 1, 2. The charge and discharge of the capacitance of transistor 1 causes an unwanted positive potential to appear on the input and this is neutralized by a negative potential supplied via resistor 3 from a differentiator and rectifier network J receiving the output of amplifier G. The output of the modulator is taken from terminal 77.
Patent GB-1366632-A (GB)
Title: Mesh structures
IPC: D04H3/045
Filed: 1970-09-04
Abstract: 1366632 Non-woven nets J F GILBERT 23 Aug 1971 [4 Sept 1970] 42340/70 Heading D1R [Also in Division B5] A mesh structure e.g. for netting, is made by a moulding process and comprises a plurality of regularly arranged members 1, 2 which are joined to one another to form a mesh structure, some of the members including first portions of synthetic plastics material and at' least some of the first portions being connected to other pre-formed members by joints 13 comprising integral parts of the first portions moulded to the pre-formed members. Fig. 3 shows an injection mould 6, 7 for making the mesh 1, 2 seen in Fig. 1 (not shown), Fig. 2 showing a moulded joint 13 between a moulded member 2 and pre-formed twine or thread 1. The netting seen in Fig. 4 (not shown) has offset moulded portions 2. A section of mesh moulded in the mould 16, 17, shown in Fig. 7 can be extended indefinitely by lifting the moulded section and replacing it in the mould with connecting portions (26) Fig. 6 (not shown) located in channel 24. The portions (26) are formed in spurs 23 in the mould. Some of the members 1 of the mesh structure may incorporate one or more electrically conductive filaments or wires 5 (Fig. 2) which are exposed at least at intervals along the length of the members 4. The members 2 may also include electrically conductive wires or filaments or powder e.g. carbon black. Such mesh structure may be used for electrified fences.
Patent GB-1248170-A (GB)
Title: Improvements relating to charge storage targets including photo-sensitive elements
Inventor: LODGE JAMES ALEC
IPC: H01J29/45
Filed: 1969-08-26
Abstract: 1,248,170. Cathode ray tubes. E.M.I. Ltd. 20 Aug., 1970 [26 Aug., 1969], No. 42422/69. Heading H1D. In a charge storage target including an array of photo-sensitive elements arranged in rows and columns, the rows are inclined at a small angle to the perpendicular to the columns so that when the target is scanned by an electron beam in lines perpendicular to the columns the formation of beat patterns is reduced without substantial reduction in vertical resolution. The angle is preferably 15-30 degrees and the target may comprise P-type areas forming photo-diodes on an N-type substrate of silicon or germanium.
Patent GB-1512088-A (GB)
Title: Fluid flow control valves
IPC: F16K7/12
Filed: 1976-10-08
Abstract: 1512088 Valves SAUNDERS VALVE CO Ltd 8 Oct 1976 [16 Oct 1975] 42555/75 Heading F2V In a screw-operated diaphragm valve, the pitch of the threads 11 between the spindle 9 and a part 5 connected to the diaphragm 4 is less than that of the threads 10 between the spindle and the bonnet 3. The threads are arranged in the same sense so that a large movement of the handwheel 7 results in a small movement of the diaphragm.
Patent GB-1023209-A (GB)
IPC: C09K23/54
Filed: 1964-10-19
Abstract: 1,023,209. Foaming compositions. DOW CORNING CORPORATION. Oct. 19, 1964 [Oct. 28, 1963], No. 42556/64. Headings C3B, C3C, C3P, C3R and C3T. A composition for making foams comprises (1) either organic liquids having a surface tension of at least 22À2 dynes(cm. at 20 C. in contact with air, or plastisols, and (2) a copolymer of SiO 2  units and units selected from (CH 3 ) 3 SiO¢ and Q(CH 3 ) 2 SiO¢ units, where Q is a radical containing a solubilizing group to make the copolymer compatable with the material (1), and the ratio of SiO 2  units to the total of the (CH 3 ) 3 SiO¢ and Q(CH 3 ) 2 SiO¢ units is in the range 0À83/1-1À67/1. The organic liquids may be hydrocarbons such as kerosene, saturated and unsaturated acids, alcohols such as methyl alcohol and esters, halohydrocarbons, ethylene oxide, aliphatic, aromatic and heterocyclic ketones, alkyl and aryl amines, triphenylphosphine, allyl isothiocyanate, diethyl carbonate, ethyl mercaptan, benzonitrile, nitroethane, nitrobenzene, paraldehyde, benzaldehyde, furfural, liquid epoxy resins and polyurethanes (together with a blowing agent, e.g. trichlorofluoromethane). As the plastisol may be used polymers of vinyl chloride or copolymers thereof with vinyl acetate in admixture with a high-boiling organic liquid plasticizer which is substantially a non-solvent for the resin at ordinary temperature but is capable of dissolving the resin at elevated temperature to form a single phase material. Organic thinners and diluents may also be used, together with stabilizers and pigments. In the copolymer the group Q may be and The compositions may be foamed by gas introduced mechanically or by the use of blowing agents. Organic liquids used in the examples are methanol, nonane, kerosene, a polyurethane obtained by mixing a tall oil N,N,N<SP>1</SP>,N<SP>1</SP>- tetrakis - 2 - hydroxypropyl)ethylenediamine, and trichlorofluoromethane and then adding diphenylmethanediisocyanate, and an epoxy resin prepared by the reaction of bisphenol A and epichlorhydrin.
Patent GB-1380326-A (GB)
Title: Apparatus for conveying a yarn at high speed
IPC: B65H51/16
Filed: 1972-09-14
Abstract: 1380326 Yarn conveyor RHONE-POULENC-TEXTILE 14 Sept 1972 [15 Sept 1971] 42761/72 Headings D1F and D1J A yarn conveying apparatus comprises a yarn guide tube 1, and means e.g. nozzle 5 for directing a stream of fluid through the tube, the tube being formed by an upstream portion 2 and a downstream portion 3 having their axes at an angle to one another, the outlet of the portion 2 feeding into the inlet of the portion 3, and the portion 3 having a longitudinal slit extending along its length through which the yarn can be withdrawn, and brought to the desired position. A baffle which may be suitably coated with ceramics may be provided within the tube at the bend defined between the portions 2 and 3. In the preferred embodiment, the conveying apparatus is used where the yarn is fed continuously but is wound up discontinuously. The yarn is conveyed through the tubes 2 and 3 and taken up in a waste disposal unit via nozzle 11 and tube 12 spaced from the outlet of tube 3. A spool 13 is passed through the space between the tube 3 and nozzle 11 to a winding position 14. The yarn is thus withdrawn from the tube through the slit and follows path 10 to be wound at 14. The catching of the yarn on the spool 13 breaks the yarn between the winding position 14 and the nozzle 11. At the completion of winding, the yarn is cut at 15 and is conveyed to the waste unit along path 9 within the tubes 2, 3.
Patent GB-995950-A (GB)
Title: Lasers
IPC: H01S5/30
Filed: 1963-10-30
Abstract: 995,950. Lasers. INTERNATIONAL BUSINESS MACHINES CORPORATION. Oct. 30, 1963 [Oct. 30, 1962], No. 42817/63. Heading H3B. [Also in Division H1] An injection laser consists of a semiconductor body having a PN junction whose length is substantially greater than its width. In Fig. 1 a gallium arsenide diode is formed as a rectangular parallelepiped with a PN junction parallel to major faces 18, 20 provided with metallic ohmic electrodes. The end and side faces 22, 24, 26, 28 are made optically flat by grinding and polishing or, preferably, by cleaving. To obtain flat end faces 22, 24 the crystal is supported parallel to the (100) plane and force is applied along the (110) plane. The junction is forward biased to give a current density above the threshold value. Stimulated emission occurs preferentially longitudinally in the plane of the junction as the device forms a resonant optical cavity. The threshold current density for longitudinal laser action is stated to be less than that in known devices, while that for transverse laser action is greater. The end faces may have reflective dielectric coatings applied to them, one transmitting 1 to 10% of the incident light and the other being perfectly reflecting. Metallic reflectors may be used if a layer of insulation, having a refractive index close to that of the crystal, is provided. The PN junction may be curved so that it emerges through the upper surface of the crystal (Fig. 7), in which case metallic reflectors 54, 56 need not be insulated. The device may be provided with a heat sink by forming a relatively thick p-type region 14<SP>1</SP> with recesses 62 in which electrodes 18<SP>1</SP> are formed, maintaining a low series resistance, as shown in Fig. 8. An arrangement is also described having a light transparent medium, having a refractive index similar to that of the crystal, between the crystal and the reflective coating at one end. The increased spacing between the reflectors increases the directionality of the output beam. The device may be operated at liquid nitrogen temperature to obtain narrower output lines.
Patent GB-1142499-A (GB)
Title: New stilbene derivatives and processes for their use
IPC: D06L4/60
Filed: 1966-09-26
Abstract: 1,142,499. Phenyl - benzoxazolyl - stilbenes. CIBA Ltd. 26 Sept., 1966 [27 Sept., 1965], No. 42895/66. Heading C2C. [Also in Divisions C5, C6 and D1] Novel phenyl-benzoxazolyl-stilbenes, for use as brightening agents, are of the formula wherein X is a free sulphonic acid group or a water-soluble salt thereof, or a sulphonamide group and Y is a free carboxyl group or a watersoluble salt thereof, and are prepared by condensing a stilbene dicarboxylic acid semi-ester, or a derivative of the free carboxyl group, with a 2-amino-4-phenylphenol (an example utilizes the ethyl semi-ester and the resulting benzoxazole intermediate is described) followed by treatment of the resulting benzoxazole with a sulphonating agent or a chlorosulphonating agent followed by hydrolysis or possibly amination.
Patent GB-914833-A (GB)
Title: Apparatus for the measurement of temperatures by thermocouple contacts
IPC: G01K7/04
Filed: 1960-12-13
Abstract: 914,833. Measuring electrically. ELECTRICITE DE FRANCE - SERVICE NATIONAL. Dec. 13, 1960 [Dec. 17, 1959; Nov. 28, 1960], No. 42931/60. Class 40 (1). The temperature inside a nuclear reactor is measured by means of a thermocouple mounted in a housing 4 which can be slid through a tube into the interior of the heater. Contact members 9 at the end of the housing engage corresponding contact members 10 on an intermediate housing 5 and as many of these intermediate housings may be inserted as are necessary to reach the part of which the temperature is to be measured. The housing 6 has spring-loaded contacts 11 which engage contact rings 12 in the wall of the housing to enable the thermocouple output to be taken off. Fig. 2 shows the contact assembly 9 which comprises a contact ring 18 to which one of the thermocouple leads is connected and a spring-loaded centre contact 23. Fig. 3 shows one of the housings provided with members 14 which guide the housing in the reactor tubes and spring-loaded contacts 11 which engage the contact rings 12. In an alternative construction of end contacts the leads from a thermocouple are brought up the outside of the housing. Fig. 7 shows a construction of the final element the output from the thermocouple being taken from pivoted arms 56 which are spring- loaded to engage contact-rings 12 surrounding the passage in the reactor wall through which the thermocouple passes. The ends of the contact arms are urged apart by spring 65 which draw their opposite arms together. When the device is to be withdrawn from the hole in the reactor wall it is pulled by the head when pistons 70 slide upwardly to engage short arms 63 on the pivoted links which are thus pivoted to lie in slots 59 along the side of the device when it is entering or leaving the hole in the reactor wall.
Patent GB-1280649-A (GB)
Title: Refractory compounds
Inventor: LEE STEPHEN ARTHUR
IPC: C01B31/36
Filed: 1969-08-29
Abstract: 1280649 Silicon carbide LAPORTE INDUSTRIES Ltd 20 Aug 1970 [29 Aug 1969] 43139/69 Heading C1A Silicon carbide is produced by reacting together at 1350-1800‹ C. silica, elementary carbon a source of sulphur, hydrogen and a gaseous source of carbon in a reaction zone, and recovering the SiC from a condensation zone. The gaseous carbon source may be carbon monoxide or a hydrocarbon, e.g. CH 4 , C 2 H 6 , C 3 H 8 , CH 2  = CH 2 , CH#CH, cyclohexane, benzene, toluene or xylene: the hydrogen may be derived in situ by cracking of the hydrocarbons. The elementary carbon may be finely divided carbon or may be constituted by the material of the reaction zone. The sulphur source may be elementary sulphur, H 2 S or silicon sulphides. Alternatively the sulphur and carbon may be derived from the same compound using, e.g. mercaptans, organic sulphides or carbon disulphide. The process may be carried out at reduced or elevated pressure, and the gases preferably have a velocity in the range 15 to 2000 cm/min. which may be conveniently adjusted by the addition of an inert gas such as argon. The condensation zone may have a temperature at least 50‹ C. below the reaction zone suitably one in the range 1000‹ to 1550‹ C. There may be provided a substrate for deposition of the SiC in whisker form in the condensation zone made of a material such as carbon, alumina, mullite or silicon carbide. SiC whiskers produced may have a thickness less than 1 micron and a length up to 5 mm.
Patent GB-1033511-A (GB)
Title: Gamma pyrones and preparation thereof
IPC: C07D309/40
Filed: 1962-11-15
Abstract: Maltol is prepared by reducing a compound of the formula <FORM:1033511/C2/1> with a metal-acid couple, hydrosulphurous acid or an alkali metal or alkaline earth metal salt thereof or hydrogen activated by a noble metal catalyst where A represents a hydroxyl group; with a metal-acid couple where A represents a di-lower alkylamino, piperidino or morpholino group wherein the lower alkyl groups contain up to four carbon atoms; or with an alkali metal or alkaline earth metal salt of hydrosulphurous acid, zinc hydrosulphite or ammonium hydrosulphite or hydrogen activated by a noble metal catalyst where A represents a chlorine, bromine or iodine atom. Hydroxymaltol is prepared by decarboxylation of comenic acid to give pyrocomenic acid which is reacted with formaldehyde at a pH of at least 5.  Compounds of the Formula I wherein A represents a dialkylamino, a piperidino or a morpholino group are prepared by the reaction of pyromeconic acid with formaldehyde and the appropriate organic amine.  Compounds of the Formula I wherein A represents a chlorine, bromine or iodine atom may be prepared by the action of the appropriate hydrogen halide on hydroxymaltol.
Patent GB-957786-A (GB)
Title: Improvements relating to thermal nuclear reactors
Inventor: PRINCE KENNETH
IPC: G21C5/08
Filed: 1960-12-16
Abstract: 957,786. Moderator structures. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Dec. 7, 1961 [Dec. 6. 1960], No. 43343/60. Heading G6C. A moderator structure comprises interlocked blocks 11, 12 of moderator material, e.g. graphite, a surrounding rigid retaining means fixedly connected to the peripheral blocks by tie bars (Fig. 1, not shown) and a charge face composed of a number of separate plates 18 positively located with respect to at least one adjacent block, each of the plates 18 being separated by a gap from its neighbours and constrained by keys 21, 22, slidingly engaged in slots in the plates 18, to a particular mode of relative movement in the plane of the plates which is consistent with permitted relative movement of the blocks 11, 12 that have positive location with respect to the plates. Upwardly flared apertures 19 in the plates 18 are aligned with the exit ends of the fuel element channels, the blocks 11, 12 being connected to the plates 18 by means of spigots 20. With all blocks in a group covered by a plate 18 located positively with respect to the plate, adjacent blocks 11, 12 opposing each other across the gap between two plates 18 are moved relatively by thermal expansion of the plates to a far greater extent than the blocks in one and the same group. The interlocking 17 between such blocks is omitted altogether, or preferably (as shown) is limited to those parts of the interlocking which allow the blocks to approach and recede freely transversely of the gap. Since the jointing of blocks between layers can be expected to tolerate the movements involved, such omission or limitation of the interlocking can be confined to the topmost layer A of blocks the next layer B having the full interlocking. When there is positive location of each plate 18 with respect to only one block in the region of the plate centre, no modification of the interlocking is necessary. The subdivision of the charging face into a number of separate plates prevents the thermal expansion from being cumulative from the centre and thus imposing relatively large movements in the peripheral region to which the retaining means is tied.
Patent GB-1402217-A (GB)
Title: Insulated gate field-effect transistor input protection circuit
IPC: H03F1/52
Filed: 1973-09-17
Abstract: 1402217 IGFET gate protection MOTOROLA Inc 17 Sept 1973 [2 Oct 1972] 43437/73 Heading H1K [Also in Divisions H2 and H3] An integrated overvoltage protection circuit for the gate of an IGFET 20 comprises an IGFET 30 which, on overvoltage, conducts as a result of avalanche charging of the gate and includes an IGFET 40 for permitting the gate 33 to be discharged prior to testing. 32 is a common source area, 33 and 43, which lie under conductive layers 23 and 24, are the gates and 11, 16 and 31 are the input leads and source or drain connection of IGFET 30.
Patent GB-1406295-A (GB)
Title: Logic circuit arrangements
IPC: H03K17/60
Filed: 1972-09-20
Abstract: 1406295 Transistor inverter circuit SIEMENS AG 20 Sept 1972 [28 Sept 1971] 43441/72 Heading H3T In a three-transistor inverter as illustrated, in order to increase the protection resistance 8, 9 provided in case of output short-circuit at 10, while keeping the output resistance as low as possible in normal operation, the collector of input transistor 3 is connected to a point in the resistive chain 8, 9 remote from T2 emitter. Any or all of resistors 8, 11, 12 may be replaced by direct connections; preferred values for R8, R9 are 100 # and 200-300 Q respectively. Normally, either T1 or T2 conducts in dependence upon the input signal at 13, so that the output 10 is connected either to one supply line (earth) through diode 7 and T1, or to the other supply line through T2 and R8, R9, R11. Should the output 10 be shorted to the one supply line (earth), diode 7 is reversebiased until its Zener voltage is reached, whereupon the voltage across T2 emitter-base function, R9 and R8 is limited to this Zener voltage and the current through them is limited.
Patent GB-1255645-A (GB)
Title: Treatment of rubber latex
Inventor: BARNARD DOUGLAS
IPC: C08C1/02
Filed: 1968-09-12
Abstract: 1,255,645. Reacting rubber latices with nitroso compounds. NATURAL RUBBER PRODUCERS RESEARCH ASSOCIATION. 11 Sept., 1969 [12 Sept., 1968], No. 43528/68. Headings C3E and C3P. A latex of a natural or synthetic rubber is mixed with a nitrosophenol or an ether thereof or a nitrosoaniline whereupon the rubber reacts with the nitroso groups so as to provide aminophenol or phenylene diamine groups chemically bound to the rubber molecules. The nitroso compound can contain other substituent groups, e.g. carboxyl groups.
Patent GB-1342322-A (GB)
Title: Enclosed type electrical apparatus containing insulating oil
IPC: C10M169/00
Filed: 1971-09-20
Abstract: 1342322 Lubricant compositions HITACHI Ltd 20 Sept 1971 [24 Sept 1970] 43639/71 Heading C5F [Also in Division H1] A mineral oil contains 0À1-8 wt. per cent of a non-ionic surface-active agent, such as polyoxyethylene-alkanol ethers, polyoxyethylene - alkylaryl ethers, polyoxyethylene/ polyoxypropylene condensates, polyoxyethylene-carboxylic acid esters, pentaerythritol esters, sorbitan monoalkyl ethers, alkyl ethers and monoglycerides. The oil is used as insulating material in enclosed-type electrical apparatus (see Division H1).
Patent GB-926991-A (GB)
Title: A counter-pressure beverage filling machine
Inventor: MEYER GEORGE LEO NICHOLAS
IPC: B67C3/26
Filed: 1959-12-28
Abstract: 926,991. Canning beer. GEO. J. MEYER MANUFACTURING CO. Dec. 28, 1959, No. 44000/59. Class 125(2). [Also in Group XXIX] The filling head of a counter-pressure machine has a plurality of inclined filling nozzles 68 which impart radial and tangential motion to the issuing liquid, and a flow control valve 66 which is carried by a stem 28 through which the counter-pressure passage 29 extends, the supply of counter-pressure air being controlled by a cam operated slide valve 41, Fig. 1 and the filling level controlled by a float valve 76. The apparatus is a rotating table type. When valve 41 is lifted, counterpressure gas enters through stem 29 and open float valve 76 and when the counter-pressure in the can 30 reaches a sufficient value the valve 66 lifts and liquid from bowl 13 flows in through the nozzles 68. When the can is filled to a level above the nozzle tops 68, float valve 76 closes the counterpressure passage to terminate filling and cam-operated lever 40 allows valve 41 to close and then contacts stem 28 to close liquid valve 66. A cam-operated snift valve 81 is then opened to vent the head space of the can to atmosphere.
Patent GB-1449699-A (GB)
Title: Apparatus for remote disintegration of a concretion in a living body
IPC: A61B17/225
Filed: 1974-10-11
Abstract: 1449699 Acoustic reflectors DORNIER SYSTEM GmbH 11 Oct 1974 [12 Oct 1973] 44126/74 Heading H4V [Also in Division A5] Apparatus for disintegration of body concretions, e.g. kidney stones comprises a shock wave generator 6 in the form of a spark discharge controlled by a controller 10, and a partellipsoidal shock wave conductor 4, the interior 5 of which contains a transmission liquid and is closed by a diaphragm. The spark discharge is at one focus of the part-ellipsoid and the concretions to be shattered arranged at the other, so that the shock waves generated are focused thereon. The shock waves duration is about 10<SP>-6</SP> sees and they are generated by a voltage of 10kV at 70 Hz.