baber/WOPTO huggingface dataset:
Patent GB-1436623-A (GB)
Title: Signalling receiver
IPC: H04Q1/46
Filed: 1973-06-21
Abstract: 1436623 Automatic exchange systems; voice frequency signalling; selective amplifiers SOCOTEL 21 June 1973 [27 June 1972] 29481/73 Headings H4K H4R and H3T In a signalling receiver 5, used, e.g. in VF inter-exchange signalling, in which an input VF signal is amplified at 15 and applied to a plurality of bandpass filters 17, each tuned to one signalling frequency, an envelope detector and shaping circuit 14 transforms the input VF signal-A-into a steady signal with a relatively slow rise time-C-which is used to control the gain of amplifier 15 and/or the Q-factor of at least one of the filters 17. Thus the receiver does not respond to the initial part of the VF signal, which is normally rich in harmonics which could trigger a detector 18 erroneously. When two detectors (for a 2 out of 5 code) 18 are triggered, their respective outputs are applied to two of the inputs 20À1-5 of a logic circuit 6. Gate 16 is then closed and gate 23 opened, so that a control signal is passed from oscillator 30 to output terminals L1, L2 for transmission to the sending exchange. Transmitting mode.-A control signal received at L3, L4 from a code receiving exchange is processed by control frequency receiver 3, band reject filter 4 rendering the branch 5 inoperative to the control signal. The control branch contains a shaping circuit 8 similar to circuit 14 and which controls the Q-factor of filters 9, 12 tuned to the control frequency. Detection of a control signal at 13 produces an output to logic circuit 6. Two terminals 22À1-5 are then actuated, according to the next digit to be transmitted, and apply gating signals to respective gated oscillators. The two resulting signals at different frequencies are combined at 26 and applied to output terminals L1, L2. The agc amplifier 15 includes a FET 76 whose gate is connected to a control input 83. The band-pass filter 17 comprises two filters tuned to the same frequency. The second filter includes a FET 116 whose gate receives a control signal applied at 78. The feed-back reactance of the operational amplifier 108, and hence the Q-factor of the filter accordingly varies as the level of the control signal.
Patent GB-869476-A (GB)
Title: Improvements in or relating to dihydroxydiarylmethanes
Inventor: BEAVER DAVID JOHN
IPC: C08K5/13
Filed: 1958-09-16
Abstract: Compounds of the general formula:  <FORM:0869476/IV (a)/1> (where R is derived from a monocyclic aromatic aldehyde R,CHO which contains only carbon, hydrogen, chlorine, and oxygen, in the molecule, R1 is an alkyl group containing at least 4 carbon atoms, and R2 is an alkyl group) are used as antioxidants in rubber base stocks.  Examples of such compounds are 2, 4-dichlorophenyl bis(21-methyl- 41-hydroxy- 51- t-butyl-phenyl) - methane and the corresponding 2-chlorophenyl and 2-chloro-6-hydroxy-phenyl compounds.ALSO:The invention comprises compounds of the general formula:  <FORM:0869476/IV (b)/1> in which the group R is derived from monocyclic aromatic aldehyde R,CHO which contains only carbon, hydrogen, chlorine, and oxygen atoms in the molecule, R1 is an alkyl group containing at least 4 carbon atoms, and R2 is an alkyl group.  The compounds are prepared by condensing a monocyclic aromatic aldehyde R,CHO with 3,6-dialkylphenol in the presence of an acidic catalyst.  An inert solvent may be present in the reaction mixture.  Specified dialkyl phenols include 3-methyl-6-t-butyl phenol, 3-methyl-6-isoamyl phenol, 3-methyl-6-n-decyl phenol, and 3,6-di-t-butyl phenol.  Aldehydes specified are o-chlorobenzaldehyde, 2,4-dichlorobenzaldehyde, 2,4,6-trichlorobenzaldehyde, and 5-chloro-salicylaldehyde. Hydrochloric acid may be used as the acidic catalyst.  Examples describe the production of 2,4-dichlorophenyl bis(21-methyl-41-hydroxy-51-t-butyl-phenol) - methane, 2-chloro-6-hydroxy-phenyl bis(21-methyl-41-hydroxy-51-t-butyl-phenyl) -methane, and 2-chlorophenyl bis(21-methyl-41-hydroxy-51-t-butyl-phenyl) methane.  The condensation is effected by heating the mixture of reactants at 95 DEG C. hydrochloric acid being present as catalyst. The compounds have antiseptic and germicidal properties and may be used as antioxidants in rubber compositions.
Patent GB-505087-A (GB)
Title: Improvements in or relating to processes for casting magnesium and its alloys
IPC: B22D21/00
Filed: 1937-10-29
Abstract: 505,087. Casting processes. BRISKE, P., and LUSCHENOWSKY, A. Oct. 29, 1937, No. 29676. [Class 83 (i)] Mould materials.-In making moist sand moulds for casting magnesium or its alloys, borofluorides of the alkali or alkaline earth metals and are mixed with the sand or applied to the mould surface. 75 to 400 g. of magnesium chloride, having 50 per cent of water of crystallization, is dissolved in one litre of water and sand is impregnated with 6 to 8 per cent of its weight of this solution. The ignited and cooled mould is then sprayed with a solution of sodium, potassium, or magnesium borofluoride or the like or 1 to 10 per cent of the sodium or potassium salt may be added to the solution of magnesium chloride. 200 g. of magnesium chloride in a litre of water and 3 per cent of sodium borofluoride give good results. Sand having a large iron content should be avoided. Among other protective substances mentioned are bicarbonates, ammonium oxalate, hydrofluoboric acid, ammonium, borofluoride and fluo-silicates.
Patent GB-799878-A (GB)
Title: An improved fastener
Inventor: FERNBERG ERIC BIRGER
IPC: F16B5/06
Filed: 1955-10-18
Abstract: 799,878. Clips. F.T. PRODUCTS, Ltd. Oct. 2, 1956 [Oct. 18, 1955], No. 29747/55. Class 44 In an assembly comprising two sheet members 15 and 18 secured in spaced relationship with the aid of a plurality of resilient fasteners 10 each bent to S-shape so as to have first and second loops 11 and 12 of U- or C-shape formed by a stem 13 and the edges of the two members being engaged by the two loops of each fastener respectively, each fastener is formed in its stem with a lug 14 having its end directed out of the plane of the stem towards the open mouth of one of the loops and one of the members is formed with a series of spaced holes 17 in each of which a lug 14 is engaged. As shown, the holes 17 are formed in a flange 16 on the member 15.
Patent GB-308159-A (GB)
Title: Improvements in rudder bars for airplanes
IPC: B64C9/02
Filed: 1928-02-23
Abstract: 308,159. Couzinet, R. A. A. Feb. 23, 1928. Divided on 312,258. Steering. - In order to give the rudder of an aeroplane a permanent set to compensate for a strong drift or stoppage of a side engine, the rudder is connected to a control-bar angularly adjustable with respect to the rudder bar operated by the pilot. The rudder-bar 99 is rotatably mounted on a vertical tube 101 to which the controlbar (not shown) is fixed. Arms 102, 104 fixed to the rudder-bar and the tube respectively are adjustably connected by a right and left handed screwed rod 109. The rod 109 preferably passes through nuts pivoted in the arms 102, 104. The foot-rests 111 are pivoted on vertical axes in the rudder-bar, or extensions 112 thereof.
Patent GB-864581-A (GB)
Title: Drydock
IPC: B63B9/00
Filed: 1959-09-02
Abstract: 864,581. Docks. COMECA S. A. Sept. 2, 1959 [Dec. 3, 1958], No. 29889/59. Class 68(2). A drydock 1 comprises side walls 1 and 2 defining a slip 3 into which a ship is floated and a floor 4 movable vertically between the walls. Each of the side walls is supported from the ground on a series of piers 5 which define alcoves 9, which house part of the floor-elevating mechanism. The floor 4 is composed of a plurality of linked beams 10 and floor sections 11 and each beam can be raised and lowered by hoisting mechanism 12. Each mechanism comprises a synchronous motor 22 driving a drum 21 on which is wound a cable 16, which passes over multiple grooved pulleys 15 and 17 connected to the beam 10 and the pier 5 respectively. By operating the motors independently the shape of the floor can be made to correspond with the shape of the keel of a ship to be docked and subsequent simultaneous operation of the motors enables the ship to be raised bodily. Each of the beams carries a pair of bilge blocks 29 and each block is adjustable transversely of the dock by a chain 30, which is driven by the sprocket 31. A shaft 34 passes through the sprocket and carries a bevel gear 36 which meshes with a gear 37, driven by a handwheel 38. As a beam 10 is raised or lowered the sprockets 31 on it slide on the shaft 34. In a modification (not shown - see Figs. 7-9) only a single wall is provided. and skeleton framework is used to support the mechanism for the other side of the platform. Only four hoists are provided, one at each corner and the platform has rails to accommodate a boat-supporting dolly.
Patent GB-1468158-A (GB)
Title: Interlockable spill plates for fencing conveyors
IPC: B65G19/28
Filed: 1974-04-10
Abstract: 1468158 Conveyer spillplates R HARRISON 10 April 1974 [12 May 1973 25 June 1973] 4777/74 and 29961/73 Divided out of 1468157 Heading B8A Spillplates 5, 5<SP>1</SP> attached by spacers 3 to the trough sections of a mine conveyer each comprise at one end on upper lug 4, 4<SP>1</SP> and at the other end a lower part 10, 10<SP>1</SP>. The parts 4, 10 and 4<SP>1</SP>, 10<SP>1</SP> interlock but permit vertical and horizontal movement between adjacent spillplates. A flexible strip of material 13 for retaining cables (not shown) may be secured along the spillplates or a partial strip (14, Fig. 5, not shown) may be attached to adjacent spillplates above the parts 4<SP>1</SP>, 101. Fig. 6 shows a lug 4 received in a cut-out in the spillplate and indicates how a mining equipment underframe 19 is able to clear a spillplate by provision of the spacer 3.
Patent GB-817360-A (GB)
Title: Chloromethylated o:o-dialkyl-thiophosphoric acid esters and a process for their manufacture
Inventor: SCHERER OTTO
IPC: C07F9/165
Filed: 1957-09-24
Abstract: The invention comprises chloromethylated O,O-dialkyl thiophosphoric acid esters of the general formula (RO)(R1O)P(S)XCH2Cl in which R and R1 each stand for CH3 or C2H5 and X is oxygen or sulphur. They may be obtained by reacting the alkali metal or ammonium salts of the appropriate O,O-dialkyl thiophosphoric acids with chloro - bromomethane.  The reaction is suitably carried out with an excess of chlorobromo-methane and an inert solvent may be present, e.g. methanol, ethanol, acetone or tetrahydrofurane.  The reaction is generally carried out below 100 DEG  C. and preferably at 50-70 DEG C.  A small amount of an alkali metal iodide may be added to the reaction mixture to increase the yield of the product. When the reaction is complete the bromide formed is filtered off and excess chlorobromo-methane is recovered by distillation and this may be used again for further batches.  The product is obtained by distillation of the residue.  Examples are given for the production of: (1) O,O - diethyl - thionothiol - phosphoric acid S-chloromethyl ester; (2) O,O-dimethyl-thionothiol - phosphoric acid - S - chloromethyl ester and (3) O,O - diethyl - thiono - phosphoric acid-O-chloromethyl ester.  In the examples for the production of products (1) and (2) the potassium salt of the O,O-dialkyl thiophosphoric acid is used and in the case of product (3) the ammonium salt is used.  The products are stated to be effective as insecticides and to be valuable as intermediates for the production of other insecticides.  Some bis - (O,O - diethyl - thionothiol-phosphoryl)-formal is also formed in one example for the production of product (1) and remains as residue after distillation of the product.
Patent GB-373922-A (GB)
Title: Improvements in or relating to directional radio transmitting systems
IPC: G01S1/02
Filed: 1931-10-29
Abstract: 373,922. Directive wireless signalling. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. Oct. 29, 1931, No. 30037. Convention date, Nov. 29, 1930. [Class 40 (v).] Relates to directional systems of the kind in which ultra-short waves are alternately radiated in two different directions, there being an overlapping direction in which a characteristic reception is obtained, and comprises the employment of two dipole aerials to give the two directional radiations, switching means being provided for energizing said dipoles alternately from a common generator. The connections between the dipoles and the switching device and/or between the switching device and the generator are preferably constructed as tuned Lecher lines and, as shown, the dipoles 2, 2<1> and 3, 3<1> co-operate with a common cylindrical or cylindro-parabolic reflector 1, being energized from a spark gap 5 through the magnetically operated switch 4. The dipoles are displaced by a suitable amount from the focal line of the reflector or may be provided with separate reflectors.
Patent GB-1175608-A (GB)
Title: New Phosphorus Esters having Pesticidal Properties
Inventor: KIRBY PETER
IPC: C07F9/12
Filed: 1967-06-29
Abstract: 1,175,608. Pesticides containing phosphorylated indanediones. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. 29 June, 1967, No. 30111/67. Addition to 1055093. Heading A5E. [Also in Division C2] A pesticidal composition comprises a carrier and/or a surface active agent and at least one phosphorylated 1, 3-indanedione of the general formula: wherein R 1  and R 2  which may be the same or different each represents a hydrogen or halogen atom or an alkyl, alkenyl, aralkyl or aryl group or R 1  and R 2  together comprise an optionally substituted alkylidene or hydrazono group attached to the indane ring through a double bond, R 3  and R 4  which may be the same or different each represents an optionally substituted alkyl group and X is an O or S atom. The carrier may be a solid or a fluid and several carriers of each type are specified. The composition may be in the form of a wettable powder, dust, granules, solution, aqueous dispersion, oil-in-water or water-in-oil emulsion, emulsifiable concentrate, aerosol, encapsulated material or paste. Other ingredients may be present, e.g. gelatin, glue, casein, gums, polyvinyl alcohol, sodium polyphosphonates, cellulose ethers, ethylene diamine tetraacetic acid, non volatile oils and other pesticides or herbicides, or solid fertilisers, e.g. superphosphates.
Patent GB-1119823-A (GB)
Title: Improvements in or relating to gramophone record sleeves
IPC: B65D85/57
Filed: 1964-07-29
Abstract: 1,119,823. Gramophone-record envelopes. N. J. GARROD. 15 Oct., 1965 [29 July, 1964], No. 30112/64. Heading B6A. A blank, Fig. 1, for forming a gramophonerecord envelope comprises a square portion 10 with side extensions 11 at three edges, the extensions 11 having scored and creased lines whereby they can be folded to form at each of the three edges a channelled part as shown in Fig. 5 to which a square part 20 corresponding to part 10 may be attached. By omitting one, two or three of the outer strips of the extensions 11, channelled edges as illustrated in Figs. 9, 10 and 11 (not shown), are obtained. A variation of the corner formation of the blank is illustrated in Fig. 13 (not shown). A closing flap 12, Figs. 1, 5 is provided. The extensions 11 are coated with adhesive on their reverse faces as indicated by the cross hatching, Fig. 2 (not shown).
Patent GB-726903-A (GB)
Title: Automatic frequency control circuits
Inventor: PUGSLEY DONALD JOHN DAVEY
IPC: H03L7/085
Filed: 1951-12-24
Abstract: 726,903. Automatic frequency and phase control circuits. PYE, Ltd. Dec. 24, 1952 [Dec. 24, 1951], No. 30166/51. Class 38 (4). Relates to automatic frequency and phase control circuits of the kind in which waveforms derived from a reference oscillation and from the controlled oscillator are mixed in a phase discriminator to produce a D.C. control voltage which is used to adjust the frequency of the controlled oscillator; and consists in feeding the D.C. voltage not only to the controlled oscillator but also to the discriminator in such a way as to alter the D.C. component of the waveform derived from the reference oscillation. In this way, when a change of frequency occurs, the necessary frequency-correcting D.C. voltage is supplied without requiring a displacement of phase between the controlled oscillation and the reference oscillation. The system is particularly applicable to television apparatus for synchronizing a scanning-source with a reference wave or pulses. Referring to the diagram, the controlled oscillator 3 feeds rectangular pulses P through a phase-splitter 2 to opposite corners of a phase-comparing diode bridge 1. The reference waveform which may be of sawtooth shape, or modified as described in Specification 714,442, is applied to the grid of a valve 6 whose anode output voltage is fed to a third corner of the bridge 1. D.C. voltage proportional to the phase difference of the two bridge inputs is taken off at the fourth corner of the bridge to the grid of a D.C. amplifier 4, and the resulting changes in anode voltage are applied to the controlled oscillator 3 to adjust its frequency. The D.C. voltage is also fed to the grid of the valve 6 and a fraction of the D.C. anode voltage of this valve is added to its A.C. output and applied to the third corner of the bridge 1 over a circuit R3, C1 having a long time constant and D.C. amplifier 6. The amplifier 6 has its gain adjusted so that the D.C. fed back to the bridge 1 is equal in amplitude to the amplitude of the sawtooth wave at the point at which the rectangular pulses are acting. When the relative frequencies of the two bridge inputs vary, the voltage controlling the oscillator 3 is varied as in the curve of Fig. 2 (a), and the relation of the pulses and sawtooth wave as shown in Fig. 2 (c) at (1), (2) and (3). At this stage, the voltage fed back to the discriminator over a long time constant circuit begins to vary, and makes a slight re-adjustment of oscillator 3 to vary the phase relation until the stage 4 is reached. Oppositely-poled diodes 7, 8 limit the amplitude of the sawtooth voltage at the anode of the valve 6. An A.C. negative feedback path from anode to grid of the valve 4 gives greater immunity from the effects of interfering pulses. The frequency of the pulses P may be a sub-multiple of the reference frequency.
Patent GB-320768-A (GB)
Title: Improvements in or relating to furnaces
IPC: F23M9/00
Filed: 1928-10-19
Abstract: 320,768. Hirsch, G. Oct. 19, 1928. No Patent granted (Sealing fee not paid). Baffles; firebridges.- A flue baffle adapted to impart a gyratory motion to the gases consists of a crescent shaped body a, having concave side faces b, c, set in the flue at an angle to the general direction of flow of the gases. In front of this baffle a deflector h may be fitted to direct the gases downwards, and in front of this may be a bridge i having a concave rear face m. The deflector h, which is supported on a lining ring r, may have one or both faces inclined so that it tapers downwards, or both faces may be vertical. The rear face of the bridge i may be at right angles or inclined to the length of the flue.
Patent GB-484677-A (GB)
Title: Hot air and gas power plant
IPC: F01K25/00
Filed: 1936-11-06
Abstract: 484,677. Gas turbines. KARRER, W. Nov. 6, 1936, No. 30317. Convention date, Nov. 15, 1935. [Class 110 (iii)] [Also in Group XXVII] In a hot air or gas power plant in which a gaseous operating medium is heated at constant volume by heat exchange and expanded in a power engine or turbine, the operating medium is mechanically compressed before admission to the constant-volume heating chamber and the resulting pressure increase is converted wholly or partly into work at a suitable point in the plant. In the plant shown diagrammatically in Fig. 1, the medium d is supplied intermittently by a compressor G to the constant-volume chamber B of a heat exchanger and thence to an intermittent-flow turbine E and a continuous-flow turbine F<1>. A part d<1> of the exhaust from the turbine E is conveyed to a combustion chamber A, in which it supports the combustion of fuel b, the hot products passing through the jacket of the heat exchanger and afterwards driving a turbine F<2>. In a modification, Fig. 2, a part d<1> of the exhaust from the turbine E is conveyed to the combustion chamber A and thence through a jacket on the heat exchanger to a mixing chamber H, while the remainder of the exhaust from the turbine is conveyed directly to the mixing chamber H. The gases are thence conveyed to the turbine F and exhausted through a second jacket on the heat exchanger. In another modification, the whole of the operating medium passes through both turbines and part of the exhaust is then used in the combustion chamber A. The two turbines may be mounted on a single shaft driving the compressor G and an electric generator ; or these turbines may drive separate generators supplying the same main, the second turbine also driving the compressor G.
Patent GB-892595-A (GB)
Title: Universal joint
Inventor: SHARP EVERETT HARRY
IPC: F16D3/24
Filed: 1959-09-07
Abstract: 892,595. Universal joints. DANA CORPORATION. Sept. 7, 1959, No. 30510/59. Class 80 (2). In a constant velocity ratio universal joint of the kind wherein balls 52, 54, 82 lie in intersecting grooves 28, 30, 40, 46, 74 ... 80 in the opposed faces of interengaging axial claws 20 ... 26 of shaft members 10, 12, the grooves are so shaped that the distance between diametrically opposite points of intersection of the groove axes 56, 57 are constant and two, 52, 54, of the balls are connected by a strut 70 thereby preventing axial separation of the joint. As shown the grooves have a straight part 32 and a curved part 34 so that the angle between the axes of intersecting grooves lies within the range of 30-40 degrees. In Fig. 9 (not shown) the grooves comprise two different curved parts.
Patent GB-508829-A (GB)
Title: Process for re-generating vulcanized rubber
IPC: C08J11/14
Filed: 1938-10-21
Abstract: 508,829. Utilizing waste rubber. SOC. HYDRO-ELECTRIQUE & INDUSTRIELLE DU MORVAN. Oct. 21, 1938, No. 30515. Convention date, Nov. 23, 1937. [Class 70] In regenerating waste rubber by heating it in a chamber round which a heating medium is circulated and into which steam at about atmosphere pressure is passed steam under pressure is used as the heating medium and a portion is reduced in pressure for supply to the interior of the chamber. Steam at about 170‹ C. and 10 kg. pressure supplied by a pipe 6 is passed through a pipe 7 to the jacket of a chamber 1 containing rubber, preferably finely - ground, and through a second pipe 8 containing a pressure-reducing valve 13 into the interior of the chamber which is maintained at about atmospheric pressure by an escape pipe 4. After the treatment the rubber is cooled by water passed through the jacket or sprinkled over the rubber. If the rubber be heated to 200‹ C. cotton contained in the scrap is carbonized.