baber/WOPTO huggingface dataset:
Patent GB-1262373-A (GB)
Title: Improvements in and relating to radiation generators
Inventor: LASSER MARVIN ELIOT
IPC: H01S5/024
Filed: 1969-05-01
Abstract: 1,262,373. Lasers. PHILCO-FORD CORP. 1 May, 1969 [2 May, 1968], No. 22279/69. Heading H1C. [Also in Division C4] An infra-red laser comprises a doped monocrystalline semi-conductor body maintained at a temperature sufficiently low for free charge carriers to be non-existent (i.e. below 4 K. for Ge and 10-15 K. for Si), radiation in the 30 to 300 micron range being produced by applying a potential sufficiently high to causecharge carriers to collide-with atoms to create ions and free other charge carriers. In this process energy quanta are distributed which causes population inversion of the charge carriers-, from an impurity level to a higher level within the forbidden band and close to the conduction band, subsequent stimulated relaxation causing the.. charge carriers to make an I.R. radiative transition to an intermediate level and thence by way of a non-radiative transition to the impurity level, Fig. 1 (not shown). The semi-conductor body is in the form of a rectangular parallelepiped having aluminium reflecting coatings on two opposed surfaces 12, 14 and ohmic contacts 15, 22 on two other surfaces, one reflective coating being apertured at 13 foroutput extraction. The semi-conductor body is.soldered to a wall of the inner chamber of a Dewar container 16 containing liquid helium, the outer wall of the container including a window 18 for the output radiation formed of polymethyl methacrylate, polyethylene or polystyrene. The semi-conductor may be formed of germanium or silicon doped with arsenic, phosphorous, antimony or boron. A variable resistor 28 is used to limit current flow from a potential source 24 when lasing commences.
Patent GB-258857-A (GB)
Title: A new or improved process for obtaining volatile metals or their oxides in a revolving tube furnace
IPC: C22B5/12
Filed: 1926-09-10
Abstract: 258,857. Vervuert, G., (Assignee of Gelsenkirchen Bergwerks Akt.-Ges.). Sept. 24, 1925, [Convention date]. Void [Published under Sect. 91 of the Acts]. Distilling zinc, lead, and other metals.-Volatile metals are obtained from ores, slags &c. by treating a briquetted charge of the ore &c. and fuel in a rotary tube furnace which may be heated directly or indirectly; or the charge may contain sufficient fuel to supply the whole of the necessary heat, heated air being in this case blown into the furnace. The furnace atmosphere may be neutral or reducing and the oxidation effected outside the furnace, or the atmosphere may be oxidizing; or the furnace may comprise separate reduction and oxidation zones. Additions required for the further treatment of the non-volatile residue may be added to the charge before briquetting. In some cases the briquettes may consist of ore only, or of ore with only a little fuel, the reduction being effected by gases. Lead and zinc may be obtained together and subsequently separated by known means. Heavy metals may be reduced and obtained from the residue.
Patent GB-709328-A (GB)
Title: Ultra-high frequency filter
IPC: H01P1/202
Filed: 1952-09-05
Abstract: 709,328. Electric filters. STANDARD TELEPHONES & CABLES, Ltd. (Federal Telecommunication Laboratories, Inc.). Sept. 5, 1952, No. 22391/52. Class 40 (8) A filter unit comprises a line 8 extending between a source and a load and having a pair of resonators units 5 and 6 coupled thereto. An auxiliary load 14 is also coupled across unit 5. Several such units are shown arranged in cascade. As shown, the line and resonators are of coaxial construction, and are coupled by coaxial line sections 10 of length one quarter of the operating wavelength. The outer conductor of line 10 is joined to the outer conductor of the resonator 5. The inner conductor 24 of the former is connected to a member 26 capacitatively coupled to inner conductor 18 of the resonator. The farther end of member 26 is connected to outer conductor 5 through an adjustable twin wire section 16. The resonator is provided with an adjustable tuning member 29.
Patent GB-797474-A (GB)
Title: Sulphonylurea derivatives
IPC: C07D213/74
Filed: 1956-07-19
Abstract: The invention comprises compounds of the general formula: <FORM:0797474/IV (b)/1> wherein W is an amino group, an acylated amino group or a nitro group and R is a saturated or unsaturated open chain or cyclic hydrocarbon radical containing at least one hetero atom selected from sulphur, oxygen, nitrogen and their alkali metal salts, together with processes for the manufacture thereof by (1) reacting a compound of the general formula: <FORM:0797474/IV (b)/2> or an alkali metal salt thereof with an isocyanic acid ester, RNCO; (2) reacting a compound of the general formula: <FORM:0797474/IV (b)/3> or a benzenesulphonyl compound capable of producing such a benzenesulphonyl isocyanate by splitting or transposition under the reaction conditions, with an amine of the general formula R.NH2; this amine may be a constituent of a salt-like nature of the benzene sulphonyl compound used as starting material; (3) reacting a compound of the general formula: <FORM:0797474/IV (b)/4> with an isourea alkyl ester of the general formula HN = C(O.Alkyl).NHR, and treating the resulting substituted sulphonylisourea with a hydrogen halide; (4) reacting a compound of the general formula: <FORM:0797474/IV (b)/5> with an oxidizing agent or a hydrolysing agent; (5) reacting a substituted carbamic acid chloride with a sulphanilamide salt; and (6) treating a sulphanilguanidine with an alkaline hydrolysing agent. In examples p-nitrobenzenesulphonamide is condensed with 3-ethoxypropyl isocyanic ester, the product isolated and reduced by hydrogen in the presence of a nickel catalyst to yield N1 - 3 - ethoxypropyl - N2 - sulphanilyl urea; bis - (acetylsulphanilyl) - urea is reacted with 3-methoxypropylamine to form the 3-methoxypropylamine salt of bis-(acetylsulphanilyl)-urea which is converted into N1-3-methoxypropyl - N2 - acetylsulphanilyl urea by heating, N1 - 3 - methoxypropyl - N2 - sulphanilyl urea being obtained on saponification; bis - (acetylsulphanilyl) - urea is similarly reacted with threo - l - 4 - phenyl - 5 - amino - 1,3-dioxane, b  - ethoxyethylamine, 3 - ethylmercaptopropylamine and 3-methylmercaptopropylamine to yield the corresponding N1-substituted - N2 - sulphanilylureas; and acetyl sulphanilylmethyl urethane is reacted with 3-propoxypropylamine, a  - aminopyridine, 2-ethoxy - 5 - aminopyridine, 2 - aminopyrimidine, 2,4 - dimethyl - 6 - amino - pyrimidine and 4-aminopyridine, any salts formed being decomposed by heat, to give the corresponding N1-substituted-N2-acetylsulphanilyeureas from which the amino compounds are prepared by saponification.
Patent GB-533156-A (GB)
Title: Mounting for anti-aircraft guns
IPC: F41A27/14
Filed: 1939-08-02
Abstract: 533,156. Gun mountings. SOC. ITALIANA E. BREDA PER COSTRUZIONI MECCANICHE. Aug. 2, 1939, No. 22442. Convention date, Aug. 24, 1938. [Class 92 (i)]  A mounting for a single or multi-barrel antiaircraft gun comprises an open-fronted cradle C the rear of which has a part-cylindrical surface for elevational engagement with a similar surface on a carriage 5 arranged for allround training on a base 1. The arrangement eliminates the usual trunnions and provides ready access to the sides of the gun for loading. The elevational mass is counterpoised by weights D. The trainable carriage 5 is provided with a seat 11 for the gunner who actuates handwheels geared to an elevating worm 22 and a training worm 7a, the latter gearing including a smoothing flywheel 7b. The gunner also controls the firing by means of a pedal 18 or handle 19b. The sight 16b is linked to the gun for synchronous movement by lever x and link 20 in known manner.
Patent GB-860783-A (GB)
Title: Improvements in or relating to cam-operated electric switches
Inventor: KERSLAKE CYRIL JACK
IPC: H01H19/63
Filed: 1956-07-20
Abstract: 860,783. Cam-operated switches. PLESSEY CO. Ltd. July 15, 1957 [July 20, 1956], No. 22490/56. Class 38 (5). [Also in Group XXXVI] The control unit of a hearing aid comprises a spring in the form of a closed ring a riveted at b to a base h which also carries two contacts c and a potentiometer track d. The spring a normally extends at an angle, as shown, to be clear of the contacts c and is bent to form a hump i. A knob f is provided with a cam face k to engage the hump i and cause spring a to connect the contacts c. A wiper m cooperates with track d. A recess l interrupts cam face k to allow spring a to disengage contacts c in the " off " position of the knob f.
Patent GB-1333855-A (GB)
Title: Count display system
IPC: H03K21/12
Filed: 1971-04-19
Abstract: 1333855 Measuring frequency IWATSU ELECTRIC CO Ltd 19 April 1971 [24 Feb 1970 (3)] 22560/71 Heading G4H In apparatus for digitally displaying an unknown frequency signal f s  at an input terminal in (Figs. 1, 4) a coarse measure is derived by counting the output pulses from a divider PR receiving the input signal for a predetermined time interval T1, a fine measure being derived by counting the number of clock pulses subsequently necessary to cause the divider PR to overflow. In the embodiment of Fig. 1, with the divider PR dividing by 100, initially the signal f s  is fed via gate G1 enabled for time T1 to the divider TR. If at the end of the time interval, when gates G3, G4 are enabled by bi-stable FF2, the divider holds a count of 76, twenty four clock pulses are fed both to the divider and to binary coded decimal counter stages 10DC, 10<SP>1</SP>DC after which the divider delivers an output pulse to reset the bi-stable FF2 and so close the gates G3, G4. The count is then decoded into decimal form and displayed as a count of 24 (by connecting decoder outputs 0, 1, 2 . . . 9, for the lowest decade, to display inputs 0, 9, . . . 1 and, for the next decade, to display inputs 9, 8, . . . 0). Any overflow pulses from the divider PR during the time interval T1 are fed via gate G2 to higher decimal counting stages 10<SP>2</SP>DC, 10<SP>3</SP>DC. The actual count in these higher decade counters is displayed. The embodiment of Fig. 4 operates in a similar manner, overflow pulses from a divider PR dividing by 10<SP>n</SP> being fed to a counter and display via lead OT. Bi-stable FF is set at the end of the interval T1 to allow clock pulses to pass both to the divider and to n counter stages. Since the wiring of the fine counter stage is such as to display, in the case of Fig. 1, the 100's complement of the count, when the counters are reset a count of 90 is displayed. This may be prevented with the apparatus of Fig. 5 (not shown) in which both decoders have their outputs 0, 1 . . .9 connected to display inputs, 0, 9 ... 1. A bistable set by the '1' output of the lowest decade counter and reset at each count of 10 provides the input to the next decade counter so that instead of the latter being stepped at the tenth input pulse it is stepped after the first, eleventh &c. The apparatus may be extended to any number of decades by similarly connecting a bi-stable between subsequent counting stages.
Patent GB-678175-A (GB)
Title: A process for the recovery of phenols from ammonia liquor and other liquors
IPC: C07C37/00
Filed: 1949-09-01
Abstract: <PICT:0678175/III/1> In the recovery of phenols from aqueous liquors by extraction with solvents such as benzene, benzine, butyl acetate, the solvent is distilled off to recover the phenols in a two-stage process, part of the solvent being evaporated in a first stage at super-atmospheric pressure (e.g. 8 atmospheres) and the remainder in a second stage at atmospheric pressure, the vapours from the first stage while still at high pressure being utilized to vaporize solvent from the residue from the first stage, after its reduction to atmospheric pressure.  As described the phenol-containing solvent enters the plant at 1 and is pumped by pump 2 through heat exchanger 3 to steam preheater 5 from which it passes to the high pressure column 9.  The "bottoms" of this column are partly circulated through auxiliary heater 11 back to the column and partly drawn off at 15 and passed through pressure-reducing-valve 16 causing some of the remaining solvent to vaporize.  The mixture of liquid and vapour passes through heat exchanger 17, where it is heated by vapours from the column 9, to a second column 19.  Part of the condensate from heat exchanger 17 is returned at 33 to the column 9 as reflux.  The bottoms from column 19 are partly recirculated to the column via boiler 37 and partly drawn off as product at 42.  Column 19 may be further heated indirectly by steam at 34 and directly by steam supplied through pipe 35.  The vapours from column 19 after passing through heat exchanger 3 and heat exchanger 46 by which they heat the ammonia or other liquor treated in the phenol-extraction plant, are condensed at 29 and the condensate collected in receiver 30. Part of the condensate is returned to column 19 as reflux.  The solvent from heat exchanger 17, after reduction in pressure at 21 passes to separator 22 from which vapour may be fed by line 23 to the vapour line 24 from column 19 to provide extra heat for the exchangers 3 and 46.  Liquid from separator 22 is cooled at 25 and collected at 26. Alternatively the line 23 may be omitted and the vapours condensed at 22 and 25.
Patent GB-815880-A (GB)
Title: Improvements in lamp shades
IPC: F21S8/00
Filed: 1957-07-18
Abstract: 815,880. Lamp shades. KELLY, W. Oct. 9, 1957 [July 18, 1957], No. 22724/57. Class 75(2) In a lampshade of the type comprising a plastic casing A having a translucent back a and a transparent front a<SP>1</SP> and in which objects c are mounted and illuminated by light passing through the casing from back to front, the casing is divided horizontally into two chambers by. as sheet of translucent or transparent material b. The objects may be mounted on pegs b<SP>1</SP> of varying length or suspended on vertical transparent sheets as described in Specification 745,599 and may also be mounted on the dividing sheet b. The back a may be of varying density and colour. The casing may be mounted in a frame having a base carrying a bracket for the lamp.
Patent GB-337409-A (GB)
Title: Improvements in or relating to the manufacture of oxygenated organic compounds
IPC: C07C31/04
Filed: 1929-07-24
Abstract: 337,409. Dreyfus, H. July 24, 1929. Oxygenated organic compounds such as ethanol, acetaldehyde, acetic acid and their homologues, and esters are prepared from hydrogen and oxides of carbon, or from compounds synthesized therefrom, especially methanol, in the presence or absence of hydrogen and oxides of carbon, using as catalysts iron, nickel or cobalt borates, silicates, phosphates or salts of other oxyacids of phosphorus. The acidic radicle is preferably in excess over the metallic component. The catalysts may be employed in conjunction with copper, or with the catalysts of Specification 337,014, or with metals of the alkali or alkaline earth series, for instance, as double salts. They may be produced by partial neutralization of the acid, or by heating a complex metallo ammonium salt. The mineral anthosiderite, 2Fe2O3.9Sio2 may be employed. Temperatures of 200‹-600‹ C., especially from 250‹-400‹ C., and pressures of 50-500 atmospheres or more may be used. In the modification where methanol is used as the initial material, this may preliminarily be prepared by passing hydrogen and oxides of carbon over a catalyst such as zinc oxide or basic chromate. Compounds capable of yielding methyl alcohol such as methyl formate or acetate, or dimethyl ether may alternatively be employed. Nitrogen, and methane, which may wholly or in part replace the hydrogen, may also be present in the reacting gases. Copper or copper-lined chambers, or chambers of steel containing molybdenum, manganese, cobalt, nickel or the like are conveniently employed.
Patent GB-1109237-A (GB)
Title: Improvements relating to brushless synchronous machines
Inventor: EDWARDS JOHN DENIS
IPC: H02P25/02
Filed: 1965-05-28
Abstract: 1,109,237. Synchronous motors; control of A.C. motors. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. 10 May, 1966 [28 May, 1965], No. 22826/65. Headings H2A and H2J. In a brushless synchronous machine arrangement comprising a synchronous machine, e.g. a motor, capable of being started as an induction motor and having a rotor field winding FM connected for energization from a co-rotating armature of an A.C. exciter over a rotating rectifier RB, the connections from the rectifier RB to the field winding FM are shunted by a first pair of series connected thyristors T1, T2 and associated resistors R1, R2 and by at least one other such pair T1<SP>1</SP>, T2<SP>1</SP>, as shown and the gate electrodes of the first pair of thyristors T1, T2 are connected such that they are turned on in response to a starting voltage across the rectifier network RB, induced in the rotor field winding during starting of the machine, of the same polarity but greater than the D.C. exciting voltage across the network RB during synchronous running, and the thyristors T1<SP>1</SP>, T2<SP>1</SP> of each other pair have their gate electrodes connected and controlled by the first pair of thyristors. As shown, when the machine is started as an induction motor the voltage induced in field FM is applied via Zener diodes Z1, Z2 to the gates of thyristors T1, T2 which conduct and cause the other pairs T1<SP>1</SP>, T2<SP>1</SP> to conduct. The output of the field winding FM is then limited by resistor R. For synchronous running the exciter field FE (Fig. 1, not shown), is energized so as to give a D.C. output at points A, B less than that required to turn on thyristors T1, T2, T1<SP>1</SP>, T2<SP>1</SP> but sufficient to turn on thyristors T3, T3<SP>1</SP> which short circuit resistor R.
Patent GB-645922-A (GB)
Title: Improvements in luminescent materials
Inventor: MCKEAG ALFRED HAMILTON
IPC: C09K11/74
Filed: 1948-08-30
Abstract: 645,922. Luminescent materials. GENERAL ELECTRIC CO., Ltd. Aug. 30, 1948, No. 22839. [Class 39 (i)] An artificial luminescent material, suitable for use in fluorescent lamps, cathode-ray tube screens, or X-ray screens, comprises an alkaline earth halophosphate wherein at least half of the halogen atoms are fluorine atoms or chlorine atoms or bromine atoms or a mixture of atoms of two or more of fluorine, chlorine, and bromine, and which halophosphate is activated by an activator of which part at least is arsenic, the proportion of which may vary from ¢ to 15 per cent, preferably from 2 to 6 per cent, by weight of the alkaline earth halophosphate. Up to 10 per cent of manganese may be added to vary the colour of the luminescent light. A mixture of one or more alkaline earth phosphates, one or more alkaline earth metal halides, and arsenic or a compound thereof such as arsenious oxide, is heated to a temperature of about 1000‹ to 1100‹ C. for half an hour. Manganese may be introduced in the form of manganese phosphate or an appropriate manganese halide. Specification 578,192, [Group XL], is referred to.
Patent GB-813331-A (GB)
Title: Improvements in molecular orientation of tetrafluoroethylene polymer films, fibres or filaments
IPC: C08J5/18
Filed: 1955-08-09
Abstract: Fibres, filaments, films, tapes and ribbons are composed of tetrafluoroethylene polymers and have a tensile strength at room temperature of at least 1 gram per denier.  The term "denier" is applied to all the articles and is defined as the weight in grams per 9000 metres length of the article.  The fibres may be formed by extruding an aqueous dispersion containing particles of the polymer and viscose into a coagulating bath for the viscose and, by heating, coalescing the polytetrafluoroethylene particles and decomposing the cellulose.  Alternatively, a coating of polytetrafluoroethylene particles may be applied to a viscose rayon filament and, by heating the product, the cellulose is decomposed and the polytetrafluoroethylene is coalesced.  The polymers have M.W's. above 8000.  Multifilaments may be coated with zinc oxide, calcium carbonate or titanium dioxide from aqueous dispersion prior to the sintering step to prevent the filaments from coalescing.  The tetrafluoroethylene may be co-polymerized with ethylene or perfluoropropylene.  The polymers may contain dispersing agents, plasticizers, titanium dioxide, chromium oxide, talc, sodium or zinc sulphate, dyes, clay or silica added to the spinning compositions or incorporated from the coagulating bath.  The articles are drawn at a temperature above the phase-transition temperature, e.g. from 300 DEG to 400 DEG  C., to draw ratios from 4 to 35.  The sintering and drawing may be in one step, or the coalesced filaments may be cooled and subsequently re-heated and drawn.  Specifications 588,697, [Group IV], 689,801 and 813,332 are referred to.
Patent GB-337352-A (GB)
Title: Improvements in pumping systems
IPC: F04D15/02
Filed: 1929-07-26
Abstract: 337,352. Triggs, W. W., (Dunham Co., Ltd., C. A.). July 26, 1929. Centrifugal pumps, -In a heating system a pump 17, drawing from the tank 16, discharges through a valve 26 to the boiler and also through the injector back to the tank 16. The return from the system is drawn through the pipe 21 by the injector and discharged into the tank 16. The discharge to the boiler is controlled by the level of the water in the tank 16, a float 30 operating the valve 26. In the event of leakage taking place past the valve 26 when the valve is closed, said leakage being greater than the amount returned from the system the pump 17 may lose its suction head, and to prevent this the leakage is bye-passed through the pipe 50 to the pipe 21. The pipe 50 may be fitted with a non-return valve 52 or a spring loaded valve operated by an exten. sion of the lever operating the valve 26. The return pipe 50 may be connected to the pipe 21 at a position before the flap valve 22. Specification 291,134, [Class 64 (ii), Heating systems &c.], is referred to.
Patent GB-1173221-A (GB)
Title: Substituted 6,7-Benzomorphans and their Preparation
Inventor: ROBINSON FRANKLIN MOORE
IPC: C07D221/26
Filed: 1967-05-18
Abstract: 1,173,221. Substituted 6,7-benzomorphans. MERCK & CO. Inc. 18 May, 1967 [20 May, 1966; 13 April, 1967], No. 23071/67. Heading C2C. Novel substituted 6,7-benzomorphans of the formula in which R is a cycloalkyl radical containing four or more carbon atoms, or alkyl-cycloalkyl, alkenyl-cycloalkyl, methylenecycloalkyl, alkynyl, alkenyl, alkyl-alkenyl, or hydroxy-alkyl and the non-toxic acid addition salts thereof are prepared by either reacting 5,9-di-ethyl-2<SP>1</SP>- hydroxy-6,7-benzomorphan with a compound of the formula RCH 2 X where X is halogen or sulphonyl, in the presence of a weak base and a water-miscible solvent, or by reducing with a metal hydride reducing agent the corresponding 5,9 - diethyl - 2<SP>1</SP> - acyloxy - 2 -acyl - 6,7 - benzomorphan [5,9 - diethyl 2<SP>1</SP> - O.CO.R) - 2 - CO-R) - 6,7 - benzomorphan], obtained by reacting the 2<SP>1</SP>-hydroxy compound with either a compound of the formula RCOX, wherein X is CP or Br or with a mixed anhydride of the formula R<SP>1</SP>O.CO.O.COR wherein R<SP>1</SP> is C 1-5  alkyl. cis - 5,9 - Diethyl - 2<SP>1</SP> - hydroxy - 6,7 - benzomorphan is made by acetylating cis-5,9-diethyl- 21 - hydroxy - 2 - methyl - 6,7- benzomorphan with acetic anhydride, heating the resulting cis - 5,9 - diethyl - 2<SP>1</SP> - acetoxy - 2 - methyl - 6,7 - benzomorphan with cyanogen bromide and hydrolysing the thus produced cis-5,9-diethyl- - 21 - acetoxy - 2 - cyano - 6,7 - benzomorphan with dilute acid. Pharmaceutical compositions, having analgesic activity and suitable for oral and parenteral administration, contain the above novel substituted benzomorphan or non-toxic acid addition salts thereof as active ingredients together with inert non-toxic carriers diluents or coatings. Reference has been directed by the Comptroller to Specification 1,000,506 and 997,637.