baber/WOPTO huggingface dataset:
Patent GB-1136247-A (GB)
Title: Apparatus for digitalising positions
IPC: H03M1/00
Filed: 1965-12-21
Abstract: 1,136,247. Position digitizers. HOLLANDSE SIGNAALAPPARATEN N.V. 21 Dec., 1965 [23 Dec., 1964], No. 54162/65. Heading G4H. An oscillator 101 feeds a frequency divider 102 which steps a ring counter ABC providing a 3-phase input to the primary windings of transformers 116, 119. The rotor of transformer 119 is fixed at a reference position whereas the rotor 115 of transformer is rotated by a movable member, the position of which is to be measured. The output of low-pass filter 117 is an A.C. signal, the phase of which represents the position of rotor 115, and low-pass filter 120 provides a reference phase signal. The zero-crossing of these signals sets and resets trigger 124 so as to pass pulses to a counter 128 for an interval representing the position of rotor 115 with respect to the reference position determined by transformer 119. A counter RST allows counting to take place only in every third cycle of the reference phase signal, the other two cycles being used for read-out and resetting of counter 128. Fig. 3 (not shown), illustrates an alternative circuitry for the part below line SL. Similar, partly common, circuits may be used for coarse and fine or independent inputs. The use of a number of phases other than three, particularly two, is described.
Patent GB-1406895-A (GB)
Title: Transistor television line scan deflection circuit
IPC: H03K4/62
Filed: 1972-11-24
Abstract: 1406895 D.C.-D.C. conversion TEXAS INSTRUMENTS Ltd 24 Nov 1972 54384/72 Heading H2F [Also in Division H3] A television line time base and D.C. supply circuit comprises deflection coils L1 connected in a resonant circuit with a storage and supply capacitor C3 and a parallel capacitor C2, a switching circuit comprising a diode D1 and a transistor ET1 connected across the resonant circuit by a diode D2, the transistor being connected to the supply through the primary winding of a transformer N1 the secondary of which is connected to the storage capacitor via a diode D3, a diode D4 being connected to the primary winding to prevent current flow from a secondary winding to the primary winding through diodes D2 and D3. During the second part of the sweep, a current builds up in the deflection coils from a storage capacitor C3 via transistor VT1. At the end of the sweep the transistor is switched off and resonant reversal of the deflection current takes place whereafter the first part of the next sweep is produced by current flowing from the coil through D1. While the transistor is conducting, current builds up in the primary winding N1 and when it goes off the back e.m.f. causes current to flow from the secondary winding to store the charge lost from C3. The voltage across C3 which may be used for external circuits, may be stabilized by controlling the conduction period of VT1 in dependence upon the voltage. EHT may be derived from a transformer T1 or a winding coupled to N1. Capacitor C3 may be chosen to effect S- shaping. In Fig. 9, not shown, the winding N2 is connected through D3 directly to the storage capacitor and a lower voltage may thus be produced thereacross.
Patent GB-1455760-A (GB)
Title: Quartz crystal vibrator
IPC: H03H9/10
Filed: 1974-12-20
Abstract: 1455760 Piezo-electric resonator SUWA SEIKOSHA KK 20 Dec 1974 [27 Dec 1973] 55228/74 Heading H1E Cracking in cooling after brazing of a quartz crystal resonator 43<SP>1</SP> when attached to mounting areas on casing 43, due to expansivity mismatch, is minimized by interposing means such as plates 45 having suitable expansivity, the resonator being attached to the plates. The expansivity of the plates 45 should be less than that of both the quartz and of the ceramic of the casing, and with the resonator attached near the inner ends of the plates, the ratio of the spacing between these inner ends to that between the inner edges of the areas of casing to which the plates are attached should equal the ratio of the excess expansivities above that of the ceramic and quartz respectively. The plates may be made of metal, e.g. "Kovar" (Registered Trade Mark). The attachment areas on the ceramic may be on separate blocks or on a unified shelf (Figs. 10a-10d, not shown). Alternatively (Figs. 11a-11c, not shown) the two attachment areas may be at different levels with the resonator attached directly to one and to the other via a single interposed plate.
Patent GB-1403395-A (GB)
Title: Production of maleic anhydride and or maleic acid
IPC: C07C67/00
Filed: 1972-11-30
Abstract: 1403395 Oxidation catalysts BADISCHE ANILIN-& SODA FABRIK AG 30 Nov 1972 [1 Dec 1971] 55266/72 Heading B1E [Also in Division C2] A supported catalyst comprises an inert caroxides V 2 O 5 , P 2 O 5 , TiO 2  and optionally WO 3  and/or MoO 3  wherein TiO 2  consisist of a mixture of two types of anatase of which one has an internal surface area of 8-30 m<SP>2</SP>/g and the other has an internal surface area of more than 30 m<SP>2</SP>/g. The catalyst may be prepared by a conventional method, e.g. by mixing compounds containing V, W, Mo and P (which on heating are converted into V 2 O 5 , WO 3 , MoO 3  and P 2 O 5 ) or their oxides, advantageously in the form of a solution or suspension in water or a solvent with the two types of anatase to form a suspension, applying the suspension to the carrier which has preferably been pre-heated to 250-450‹C and heating the oated carrier in a muffle furnace at 300-500‹C
Patent GB-1322867-A (GB)
Title: System for supervising the operation of a repeater for bipolar signals
IPC: H04L1/24
Filed: 1971-11-29
Abstract: 1322867 Digital transmission; testing J LACHAISE 29 Nov 1971 [3 Dec 1970] 55346/71 Heading H4P In an arrangement for testing operation of a repeater, periodic binary code test signal combinations are injected after conversion into bipolar form into a train of bipolar random pulses which are applied to the repeater input through an artificial line characteristic of operating conditions, the frequency of polarity violations at the repeater output being measured. Test signal combinations may be 111, 01, or 1 the amplitude of which may be adjusted. Random signals through transformer 24 are applied alternatively with measuring signals through a variable attenuator 32 to a bridge coupler 31, output from which passes through another variable attenuator 33 and artificial line 2 to repeater 3, polarity violations from which are measured at 40 and counted at 50. The arrangement is operated by varying the amplitude of measuring pulses and noting polarity violation count. Operation is considered satisfactory if the count is zero with measuring pulses of 50% amplitude or more. Measuring signals are introduced into random signals in unit 20 at a frequency of 8 kHz by means of logic circuits given in Fig. 3 (not shown). A detailed testing procedure is described in the Specification.
Patent GB-1120367-A (GB)
Title: Novel water-soluble monoazo dyes and method for the production thereof
IPC: C09B62/51
Filed: 1966-12-12
Abstract: The invention comprises water-soluble monoazo dyes of the formula <FORM:1120367/C4-C5/1> wherein R1 represents CH3 or C2H5, R2 represents CH3, OCH3 or OC2H5 and n represents 1,2 or 3.  They may be prepared by conventional coupling procedures or by sulphation of the corresponding hydroxy-ethyl-sulphone derivatives. Examples are given for the preparation of the dyes.  They are useful for dyeing natural or regenerated cellulose materials and polyvinyl alcohol materials.
Patent GB-1285596-A (GB)
Title: The purification of aqueous zinc chloride solutions used in the wet spinning of acrylonitrile polymers
IPC: C01G9/04
Filed: 1969-11-13
Abstract: 1285596 Purification of polyacrylonitrile spinning solutions containing zinc chloride DOW BADISCHE CO 13 Nov 1969 55526/69 Heading B5B [Also in Division C1] Impurities are removed from aqueous zinc chloride solutions used as spinning solutions or as coagulating solutions in the wet spinning of acrylonitrile polymers by: (1) adjusting the pH of the ZnCl 2  solution to a value of from 1 to 2, preferably 1À4 to 1À6; (2) adding KMnO 4  to oxidize oxalate ions present in the solution; (3) adjusting the pH of the resulting solution to a value of from 5 to 6, preferably from 5 to 5À5; (4) adding sufficient KMnO 4  to oxidize the metallic ions (other than zinc) present in the solution; and (5) filtering the resulting solution to remove insoluble precipitates. The proportion of KMnO 4  added in step (4) to oxidize metallic ions is preferably at least equal to 2/3 of the proportion of KMnO 4  added in step (2) to oxidize the oxalate ions. The aqueous ZnCl 2  may first be adjusted to a concentration of 30% to 50% of ZnCl 2  prior to step (1). The temperature maintained during the process may be 10‹ to 40‹ C. The contaminated ZnCl 2  solution may first be stripped of remaining monomers e.g. by steam-stripping. Thereafter the pH of the solution is lowered by the addition of an acid such as HCl. Owing to the difficulty of measuring the pH of the concentrated solutions usually encountered, samples of the solutions are generally diluted withdistilled water for the pH measurement, e.g. one volume of 60% ZnCl 2  solution is diluted with nine volumes of distilled water, zinc chloride solutions having a concentration other than 60% being diluted to a corresponding degree. The pH adjustment in step (3) may be effected by adding NaOH or ZnO.
Patent GB-1418377-A (GB)
Title: Valve assembly
IPC: F24H9/12
Filed: 1973-11-30
Abstract: 1418377 Valves C LENNART 30 Nov 1973 55560/73 Heading F2V [Also in Division F4] A radiator valve assembly for use in central heating systems for connecting a hot water supply line and a return flow line to a radiator, includes within a housing 25, a supply inlet 8, a return outlet 9, a shunt 2, a supply passageway controlled by valve closure member 6, and a return pipe 4 extending from the radiator 10 to the return outlet 9. A non-return valve is arranged to open and close the return pipe 4; the valve permitting water to flow into the outlet 9 from the pipe 4, but preventing flow from the shunt 2 into the pipe 4. The valve is formed of either rubber or a plastics material and includes a base portion 15 separated from a leaf 3 by a portion of reduced thickness 14.
Patent GB-1363898-A (GB)
Title: Hot water supply systems
IPC: B65D88/54
Filed: 1971-12-01
Abstract: 1363898 Hot water heaters CORY CORP 1 Dec 1971 [10 Feb 1971] 55698/71 Heading F4A A hot water supply system has a tank 11 in which water is heated and which is fed with cold water through a duct 17 containing a shut-off valve 18 and a control means 26 which passes the cold water when the valve 18 is open and vents the tank when the valve is closed. Valve 18 is actuated by a solenoid and the water is heated by an electric heater 25. Hot water is discharged automatically through a syphon 12 to a coffee brewer spray head 48, when the valve 18 is open. Passage of cold water through the duct 17 raises a valve member 29 to permit the water to pass through duct 19 into inlet guide tube 22. When the valve 18 is closed the member 29 falls and opens an air vent 38.
Patent GB-1268430-A (GB)
Title: Process for the production of urea
IPC: C07C239/00
Filed: 1969-11-14
Abstract: 1,268,430. Process for the production of urea. SNAM PROGETTI S.p.A. 14 Nov., 1969 [16 Dec., 1968], No. 56005/69. Heading C2C. A process for the continuous production of an aqueous solution of urea comprises reacting CO 2  and NH 3  in the presence of water in a first reactor so as to form an aqueous solution of ammonium carbamate, converting in a second reactor at least part of the ammonium carbamate in the aqueous solution to urea, decomposing any unconverted ammonium carbamate into CO 2  and NH 3 , stripping in the presence of a gas which is inert to the initial reactants or to ammonium carbamate, the last-mentioned CO 2  and NH 3  from the urea, causing or allowing the purified urea to be withdrawn as an aqueous solution, and recycling to the first reactor the inert gas and the stripped CO 2  and NH 3 , said inert gas leaving the first reactor as a gaseous effluent and at least a part of said effluent inert gas being re-employed in a subsequent stripping operation.
Patent GB-1418674-A (GB)
Title: Voltage supply systems for capacitive loads
IPC: G09G3/20
Filed: 1972-12-05
Abstract: 1418674 Transistor capacitor charging and switching circuits OWENS-ILLINOIS Inc 5 Dec 1972 [23 Dec 1971] 56014/72 Heading H3T [Also in Division H2] A supply circuit for a capacitive load such as a gas discharge display panel 10 comprises a pair of series connected, non-saturating transistor amplifiers 53, 53<SP>1</SP>, with an intermediate point 43 between the amplifiers connectible to the load, a respective regenerative positive feedback circuit 52, 57, 58; 52<SP>1</SP>, 57<SP>1</SP>, 58<SP>1</SP> for each amplifier and control circuits for alternately switching the amplifiers on and off. Two such supply circuits 30, 31 are provided for supplying square wave potentials to the row conductors 13 and the column conductors 14 of the panel which contains a neon-argon gas mixture and operates at a frequency in the range 30-50 kHz. A negative pulse S1 is supplied from a circuit 32 to a transformer T1 and switches off a transistor 42. A transistor 46 is therefore non-conductive and a diode 51 is reverse biased. The pulse S1 is inverted by a transistor 73 and the output of a transistor 61 switches on a driver transistor 52. The transistor 53 is switched on so that the load current flows through the feedback resistor 57, the voltage across which is applied to the baseemitter circuit of the transistor 52 to control the conduction of the transistor 53. On removal of the pulse S1 the transistor 46 conducts and the diode 51 is forward biased so that the voltage at the base of the transistor 52 is held at a fixed level thereby disabling the feedback loop. Pulses S2 are also supplied to a transformer T2 to alternately switch the transistor 53<SP>1</SP> on and off.
Patent GB-1216988-A (GB)
Title: Aqueous polyester lubricants for metal working
IPC: C09K23/52
Filed: 1967-12-11
Abstract: 1,216,988. Polyesters. CINCINNATI MILLING MACHINE CO. 11 Dec., 1967 [9 Dec., 1966], No. 66234/67. Heading C2C. [Also in Divisions B3, C3 and C5] An ester, suitable for use in lubricant compositions (see Division C5), is made by condensing (a) 1 mol. of a dimer of an unsaturated C 16-26  fatty acid, and (b) 0À66 to 1À5 mols. of a polyoxyalkylene glycol having a degree of polymerization of 4 to 200, and in which the alkylene group contains 2 to 4 carbon atoms. The condensation is continued until 50 to 90% of the theoretical water has been eliminated.
Patent GB-1277127-A (GB)
Title: beta-METHYLGLYCIDYL-ISOCYANURATES, PROCESSES FOR THEIR MANUFACTURE AND THEIR USE
IPC: C07D405/14
Filed: 1969-11-18
Abstract: 1277127 Epoxy resins CIBA-GEIGY AG 18 Nov 1969 [21 Nov 1968] 56502/69 Heading C3B [Also in Division C2] Curable compositions comprise (a) tri-(#- methylglycidyl) isocyanurate, di-(#-methylglycidyl)-glycidyl isocyanurate or (#-methylglycidyl)- diglycidyl isocyanurate (b) a curing agent for epoxide resins e.g. a polyamine or a polycarboxylic acid anhydride such as polysebacic acid anhydride or comprise a still curable, soluble and fusible pre-condensate of components (a) and (b). In examples tri-(#-methylglycidyl)isocyanurate is cured by heating with (a) hexamethylene diamine (b) triethylenetetramine and (c) polysebacic acid anhydride, and 1-methyl-imidazole as accelerator. The compositions are moulded in aluminium moulds.
Patent GB-1366146-A (GB)
Title: Magnetic storage devices
IPC: C22C28/00
Filed: 1971-12-07
Abstract: 1366146 Depositing ferromagnetic films WESTERN ELECTRIC CO Inc 7 Dec 1971 [7 Dec 1970] 56775/71 Heading C7F [Also in Division H3] A ferromagnetic film 300-5, 000 thick deposited on a substrate has an easy direction of magnetization normal to the plane of the film surface and a composition Mn 0À8-1À2  Al 0À8-1À2  Ge 0À8-1À2 . The film is preferably deposited by evaporation, sputtering or thermal decomposition on substrates such as glass, quartz, sapphire, mica and KCl. The preferred method is sputtering in a partial pressure of 7 Î 10<SP>-2</SP> of argon at 1500 volts D.C. which gives a deposition rate of 155 / minute. The substrate is maintained at up to 800C preferably 300-600C. during deposition and the target may be the Mn Ge Al compound, a mixture of the powder elements or separate targets of Mn, Ge and Al.
Patent GB-1140590-A (GB)
Title: Electric pulse signalling system
IPC: H03K5/00
Filed: 1966-12-22
Abstract: 1,140,590. Pulse radar. STANDARD TELEPHONES & CABLES Ltd. 22 Dec., 1966 [27 Dec., 1965], No. 57377/66. Addition to 1,073,024. Heading H4D. [Also in Division G1] A system for generating a clear correlation signal free of sidebands for use in a pulse radar operates by transmitting either in time or frequency multiplex two sequences of coded pulses, each in a different code. The received replies of the sequences pass to a correlator which also receives delayed versions of the transmitted sequences. Corresponding sequences in the received and delayed signals are individually correlated at different delays, and the two correlation results so obtained are themselves correlated. A clear unambiguous correlation signal is then obtained at only one value of delay. In a time multiplex arrangement (Fig. 1) sequences S 1  (t), S 2  (t) modulating a carrier derived at 8 are derived from pulses from a generator 5 and codes 7, 10, the particular sequence transmitted being determined by counter 9 and gate 6. The sequences are combined at 11, amplified and transmitted. They are also passed via a variable delay unit 12 to corresponding multipliers 16, 17. In these the separate sequences are multiplied with the received signals obtained at 4 and integrated to obtain the correlation waveforms for each sequence. The waveforms contain a large spike indicating true correlation and several smaller spikes. The two waveforms are themselves correlated in units 20 and 21. The codes used in the sequences are so chosen that this second correlation step will result in only a single clearly defined output pulse. In an alternative embodiment (Fig. 2, not shown) the two sequences of coded pulses are modulated on different carrier frequencies, which are mixed before transmission to achieve frequency multiplexing. At the receiver the two frequencies are separated by filtering before carrying out correlation. Details of suitable codes are described and illustrated in the specification.
Patent GB-1139180-A (GB)
Title: Improvements in automatic gain regulators
IPC: H03G3/00
Filed: 1966-12-22
Abstract: 1,139,180. Transmission system gain control. INTERNATIONAL STANDARD ELECTRIC Ltd. 22 Dec., 1966 [29 Dec., 1965], No. 57381/66. Heading H4R. In a pilot controlled gain regulating system wherein the pilot signal is compared with a reference level and the difference signal is used to drive a digital counter, the counter setting is used to effect gain control, and means are provided for locking the counter in the event of pilot failure. The pilot signal is extracted at a hybrid 2, Fig. 1, and when comparison in 5 with a D.C. reference voltage shows more than a preset deviation a counter direction control signal and a signal for gating stepping-pulses from a generator 3 to a binary bi-directional counter 8 are produced. Regulation in amplifier 1 may be by an indirectly heated thermistor, and alarm circuits may be energized when the counter, which is electronic, is driven to either of two end positions, at each extremity a transistor in the counter saturating to prevent further movement. Manual control is provided, a gate 6 being locked to preserve the counter contents, and a manually adjustable potentiometer being switched into the amplifier circuit. The counter may be set manually by pushbuttons. The thermistor and its heating element arc included in a loop control circuit including a number of transistor amplifier stages to compensate for changes of ambient temperature and the gate 6 is locked in the event of pilot failure. Circuit arrangements for producing a thermistor output proportional to the logarithm of the amplifier gain are also described. In a two pilot system effecting slope control, a variable equalizer in the amplifier is adjusted by a counter according to the difference in pilot levels.
Patent GB-1402440-A (GB)
Title: Infra-red gas analyser
IPC: G01N21/35
Filed: 1972-12-13
Abstract: 1402440 Infrared gas analyzer BRITISH LEYLAND MOTOR CORP Ltd 7 Dec 1973 [13 Dec 1972] 57528/72 Heading G1A In an infrared gas analyzer for detecting several gases in a sample, a series of infrared sources 15, 16, 17 are energized in sequence by an electronic drive unit 22 so that radiation will pass in sequence through a corresponding series of band pass filters and via a sample chamber 11 through which the gas to be tested flows. The filters are such that one passes a wavelength that is substantially unabsorbed by any of the gases present, while each of the other filters pass a different wavelength each of which is liable to be absorbed to some extent by a different one of the gases whose presence is being detected and measured. A detector 21 receives the radiation that has passed through the chamber and the detector's output is fed to an electronic processing circuit 23 that is synchronized by the drive unit 22. The electronic processing circuit 23 compares in turn the detector's output signal for the two wavelengths that are liable to be absorbed with the output corresponding to the unabsorbing wavelength, and the result is shown on indicators 24 and 25.
Patent GB-1298701-A (GB)
Title: Heat-insulating antipiping compounds
Inventor: RUMBOLD BERNARD CARL
IPC: B22D27/06
Filed: 1969-11-12
Abstract: 1298701 Expanded refractories FOSECO INTERNATIONAL Ltd 20 Nov 1970 [25 Nov 1969] 57595/69 Headings C5G and G9 An anti-piping heat insulating composition comprises acid treated graphite and one of grog, sand, SiO 2 , Al 2 O 3 , MgO, clays and refractory silicates. Up to 10% of a base, e.g. CaOH, MgOH, Na 2 CO 3 , MgCO 3 , up to 20% of an oxidizable material, e.g. Al, Mg or Ca 2 Si; and 5-15% of a fibrous material are optional. Vermiculite, perlite; pumice or refractory progenitors can be used with the graphite.
Patent GB-1280232-A (GB)
Title: Glyoxylic acid derivatives
Inventor: MCCAULLY RONALD J
IPC: C07D243/24
Filed: 1969-07-08
Abstract: 1280232 Glyoxylic acid derivatives AMERICAN HOME PRODUCTS CORP 8 July 1969 [26 Feb 1969] 57929/71 Divided out of 1280231 Heading C2C Diacyloxyacetic acids are prepared by reacting glyoxylic acid (I) with the anhydride of an acid (pK > 3À75) in the presence of a carboxylic acid (pK > 3À75), and may be converted to the acid halides by standard methods. Acylated glyoxylic anhydrides are prepared by reacting (I) with an acid anhydride, optionally in the presence of a carboxylic acid (pK < 4À75).
Patent GB-1298224-A (GB)
Title: Method of making polymeric printing plates
IPC: B41C1/05
Filed: 1969-12-01
Abstract: 1298224 Printing plates by laser treatment of polyacetals E I DU PONT DE NEMOURS & CO 1 Dec 1969 [4 Dec 1968] 58497/69 Heading C3P [Also in Division H1] A polymeric printing plate is obtained by subjecting the surface of the plate to a focused laser beam of sufficient intensity to decompose and form depressions in the surface and controlling the position and intensity of the beam to form a pattern of predetermined shape and depth. The plate is composed of polymers containing certain  structural units. They are typically polychloral, formaldehyde or ethylene oxide/hexafluoroacetone copolymers, end-capped polyoxymethylene, polythiocarbonyl fluoride, or chloral/pchlorophenylisocyanate copolymer.