baber/WOPTO huggingface dataset:
Patent GB-388125-A (GB)
Title: Improvements in and relating to gas-blast electric switches
IPC: H01H33/12
Filed: 1931-11-06
Abstract: 388,125. High-tension switches. INTERNATIONAL GENERAL ELECTRIC CO., Inc., 120, Broadway, New York, U.S.A.-(Assignees of Allgemeine Elektrici. tõts.Ges.; 2, Friedrich Karl-Ufer, Berlin.) Nov. 6, 1931, No. 30828. Convention date, Nov. 6, 1930. [Class 38 (v).] Relates to a gas-blast switch with circuitbreaking contacts (for example 5 .. 8) in series with one another and with isolating contacts 3 at which no current is interrupted, the arrangement being such that when the breaker has been isolated from the current by the opening of the isolating contacts the break contacts automatically close, as in Specification 378,377. According to the invention, the opening of the isolating contacts is effected through the medium of the compressed gas which fills a cylinder or charges a spring ready for the closing movement while the blow-out blast is in action and is effective to do the further work after the gas blast supply has been cut out, thereby economizing gas pressure. In the arrangement shown, when the gas pressure is turned on it enters through the non-return valves 9 .. 12 and withdraws the contact pins from their nozzle contacts 5.. 8 against the action of springs. The gas escapes through the nozzles and blows out the arc ; it also fills the inner cylinder 2 through the non-return valve 21. When the pressure is cut off, the valve 21 closes, a latch 24, 25 held in place by the gas pressure is withdrawn by a spring and the gas trapped above the piston 23 separates the isolating contacts. The break contacts are now reclosed slowly, the air escaping slowly through throttling conduits from the cylinders containing the pistons 13 .. 16. To complete the circuit low. pressure is admitted to the underside of the piston 23 through the valve 22 the pressure being too low to cause closure of this valve or of the valve 21.
Patent GB-1450762-A (GB)
Title: Convolver arrangements
IPC: G06G7/195
Filed: 1972-06-30
Abstract: 1450762 Generating convolution functions DEFENCE SECRETARY OF STATE FOR 1 Oct 1973 [30 June 1972] 30861/72 Heading G4G [Also in Division H3] A convolver arrangement for producing an output signal related to the convolution of two input signals, comprises a device 12, Fig. 2, having a first input 16 receiving a signal R(t) from a reference waveform generator 11, a second input 17 receiving a signal S(t), and an output 15 connected to a gate 14 which is opened and closed by a pulse generator 13 triggered by generator 11. The signals may be analogue or digital. A preferred device 12 employs surface acoustic waves and comprises two input interdigitated transducers 2, 3 on a piezoelectric substrate 1 with a non-linear characteristic, e.g. lithium niobate, lead zirconate titanate or cadmium sulphide, and metal films 4 on opposite sides of the substrate defining a signal interaction region therebetween and having terminals 5 to provide the output signal. The gate 14 is operated to be open when the reference input signal lies within the interaction region. Bulk acoustic waves may alternatively be used. The substrate may alternatively be electrostrictive, e.g. strontium titanate. The use of magnetostatic waves in a YIG rod is also envisaged. In the modification of Fig. 6 (not shown) two identical convoluting devices (52a, 52b) are connected to a reference waveform generator (51), the input to one device (52b) being delayed with respect to that of the other device (52a). The outputs of the two devices are gated by respective gates (54a, 54b). This arrangement may be extended to include more than two convoluting devices. The invention may be used in a radar system. A theoretical treatment is given relating to the lengths of input pulses and to the consequences of R(t) and S(t) being mutually shifted.
Patent GB-1356441-A (GB)
Title: Glass fibre-reinforced rigid foam bodies
Inventor: HELLER R
IPC: B29C70/00
Filed: 1971-07-01
Abstract: 1356441 Fibre reinforced foamed polyurethane mouldings CONTRAVES AG 1 July 1971 [3 July 1970 3 June 1971] 30905/71 Heading B5A To produce fibre reinforced polyurethane foam bodies, an air permeable mould F1 having a cavity 25 is used and the following steps are performed; (a) a predetermined quantity of foamable liquid polyurethane resin is placed in the cavity, (b) a block 1a of glass fibres is placed in the cavity, (c) a pressing plunger F2 having vents 26 is used to compress the fibre block in order to expel air and force the resin into the interstices of the block and (d) the plunger F2 is retracted to a predetermined position corresponding to the desired final volume of the body to allow foaming of the resin, the resin/fibre mass being retained in the cavity until the resin has hardened. Bodies of density in the range 100 g/l. to 500 g/l. can be produced by varying the quantities of resin and fibre used. In alternative examples, sheets of fibre may be stacked to give a layered product (Fig. 9) or loose fibres may be sprinkled into the resin in the mould cavity (Fig. 10, not shown).
Patent GB-683856-A (GB)
Title: Stud driving tool and method of power control
IPC: B25C1/12
Filed: 1950-12-19
Abstract: 683,856. Explosively operated tools. POWDER-POWER TOOL CORPORATION. Dec. 19, 1950 [Dec. 29, 1949], No. 30952/50. Class 119 In a method of fixing studs in a surface by subjecting the stud to an explosive driving force, a standard explosive charge is used and the effective pressure and effective time during which pressure is applied are varied simultaneously. As shown, a stud 16 is placed in the barrel 13 of a tool and moved into a position a predetermined distance from the muzzle by a breech plug 14 which carries a standard explosive charge 18. Breech plugs having different extensions may be used thus varying the volume of the combustion chamber and the distance of the stud from the muzzle, Figs. 3 and 4 (not shown). A breech plug having no extension may also be used, Fig. 2 (not shown) and the stud placed in contact with it or moved to the required position by means of a graduated setting rod, Fig. 5 (not shown), which also has a projection for removing a used cartridge which may have stuck.
Patent GB-932980-A (GB)
Title: Combustion chambers for liquid fuels
IPC: F23M5/08
Filed: 1961-08-28
Abstract: 932,980. Generating combustion products under pressure; liquid fuel combustion chambers. L. BOLKOW, [trading as BOLKOWENTWICKLUNGEN KOMM.-GES.]. Aug. 28, 1961 [Aug. 27, 1960], No. 30966/61. Class 51(1). [Also in Group XXVI] In a liquid fuel fired combustion chamber 3 for a rocket motor or a gas turbine, cooling water is introduced with a swirling motion through a ring-shaped gap 7 and passes thence along the inside of the wall 6 of the combustion chamber. Liquid fuel is injected through a nozzle la into the chamber and oxygen or an oxygen carrier is introduced via a conduit 5 and bores 4a distributed over the end of the chamber. Water is introduced through the gap 7 between the end and side walls of the combustion chamber, guide blades 9 being obliquely mounted in the gap to impart a swirling motion to the water flow. As an alternative to the oblique guide blades a rotating blade wheel may be provided in front of or behind the gap 7.
Patent GB-271915-A (GB)
Title: Improved system for controlling self-oscillation in radio apparatus
IPC: H04B1/22
Filed: 1925-12-08
Abstract: 271,915. Carborundum Co., Ltd., (Carborundum Co.). Dec. 8, 1925. Thermionic amplifiers and generators. - Selfoscillation in tuned thermionic valve circuits is regulated by a uni-directional electrically-variable resistance element. Fig. 7 shows a wireless receiving-circuit comprising an aerial 23 coupled to the tuned grid circuit of a high-frequency amplifier 27, the plate circuit of which is coupled to a tuned circuit 30, 30<a>. Across this circuit is connected a uni-directional resistance 31 (such as a diode valve, a crystal, or an electrolytic rectifier) in series with a variable source 33 of directcurrent voltage. The damping effect of the resistance 31 varies with the voltage applied by the source 33. The resistance 31 may serve alsoas a detector for the received waves, giving audible signals in the phones 32. Any source of oscillatory energy may replace the aerial as the input to the valve 27. Fig. 8 shows a pair of uni-directional resistances 47, 48 connected in opposite sense across the tuned grid circuit of a back-coupled valve. A variable battery 49, 50 is arranged in series with each resistance. Speci. fications 13636/13, 28413/13, and 172,376 are referred to.
Patent GB-674419-A (GB)
Title: Improvements in and relating to regulated power supplies
IPC: G05F1/52
Filed: 1950-12-20
Abstract: 674,419. Automatic voltage control systems; converting. BRITISH THOMSON-HOUSTON CO., Ltd. Dec. 20, 1950 [Dec. 30, 1949], No. 31031/50. Classes 38 (ii) and 38 (iv). In a D.C. power supply derived from the rectified output of an oscillator in which the output voltage or current is maintained constant, the percentage regulation is also maintained substantially constant by varying the loop gain of the control system as the portion of the output that is fed back is varied. The output of the oscillator 1, Fig. 1, is amplified by a tetrode valve 15 coupled by a tuned transformer 28 to a voltage doubling rectifier 35, 40. A portion B of the output is tapped off potentiometer 44 and applied to a control valve 50 which has a stabilized bias voltage derived from a discharge device 57. The output of the valve 50 is applied to the screen grid of the amplifier 15. A variable condenser 8 in the tank circuit of the oscillator is ganged with the slider of the potentiometer 44 so that as the value of B is changed by adjustment of the potentiometer tapping the frequency of the oscillator 1 is adjusted to change the effective impedance of the tuned circuit 28, thereby varying the loop gain Á, and so maintaining the product Á# constant. In a modification, Fig. 3 (not shown), the control valve 50 controls a reactance valve in the tank circuit of the oscillator instead of controlling the amplifier stage, the detuning of the oscillator serving to control the output voltage and to vary the loop gain. In a current control system, Fig. 4 (not shown), the output current is measured by a tapped series resistor, which replaces the potential divider of either of the previous embodiments.
Patent GB-980255-A (GB)
Title: Improvements relating to ion-exchange apparatus
IPC: B01J47/10
Filed: 1961-08-29
Abstract: A valve arrangement allows an ion-exchange process using cation- and anion-exchange columns to be used in series while the regeneration position allows for parallel flow.
Patent GB-175022-A (GB)
Title: Improvements in tobacco pipes
IPC: A24F1/00
Filed: 1920-11-04
Abstract: 175,022. Norton, L. E. Nov. 4, 1920. Tobacco pipes.-A porous plug C, formed with fongitudinal perforations or external grooves, is inserted in a hollow connecting piece A which is screwed into the mouthpiece G and fits tightly within the stem of the pipe.
Patent GB-798891-A (GB)
Title: Improvements in or relating to electric switches, more particularly for high frequencies
IPC: H01H19/58
Filed: 1956-10-15
Abstract: 798,891. Mechanical switches, without quick action; switch contacts. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Oct. 15, 1956 [Oct. 18, 1955], No. 31299/56. Class 38 (5). In a rotary wave-change switch, the fixed contacts 3 are recessed within the surface of a stiff insulating support 1, and the movable contacts 5 are arranged on one surface of a flexible insulating rotor plate 7, contact pressure being maintained by springs 9, 11 acting on the reverse side of plate 7. Alternatively, the fixed contacts are on the surface of plate 1, and the moving contacts recessed into plate 7. The recessed contacts may be pressed into the insulation of both contacts may be formed by electro-deposition.
Patent GB-1105559-A (GB)
Title: A nuclear reactor
Inventor: MARGEN PETER HEINRICH ERWIN
IPC: G21C11/08
Filed: 1965-07-22
Abstract: 1,105,559. Reactors. ATOMENERGI A.B. 22 July, 1965 [12 March, 1965], No. 31315/65. Heading G6C. A boiling water moderated nuclear reactor is contained within a pre-stressed concrete vessel. The water and steam are contained within a thin walled steel shroud which is separated from the pressure vessel inner wall by a heat insulating gas e.g. nitrogen. To prevent high pressure differences across the shroud walls it is formed of separate upper and lower parts connected through a water seal which transmits the internal steam pressure to the gas atmosphere surrounding the shroud. Circulation of the gas is restricted by steel foils. Cooling of the concrete walls is effected by internal water tubes. The floor surface of the concrete vessel has a heat insulating layer of a metal wire mesh immersed in water.
Patent GB-1242656-A (GB)
Title: Improvements in colour developer compositions
IPC: G03C7/413
Filed: 1969-06-20
Abstract: 1,242,656. Hydroxyaniline derivatives. FUJI PHOTO FILM CO. Ltd. 20 June, 1969 [20 June, 1968], No. 31418/69. Heading C2C. [Also in Division G2] Compounds are disclosed of the formula where each of R and R<SP>1</SP> is H, halogen or an alkyl, hydroxyalkyl or alkoxy group of 1-4. carbon atoms. Compounds of the above formula where R and R<SP>1</SP> are each hydrogen or methyl groups adjacent to the -OH groups and the CH 2  is attached to the central benzene ring in m- or p-position are made by reacting paminophenol or 3-methyl-4-hydroxyaniline with terephthalaldehyde or isophthalaldehyde to form Schiff's bases which are then reduced with NaBH 4 .
Patent GB-336440-A (GB)
Title: Improvements in or relating to heat and sound insulating materials, and refractory materials
IPC: C04B28/00
Filed: 1929-10-18
Abstract: 336,440. Cases, M. Oct. 24, 1928, [Convention date]. Nonconducting coverings for heat and sound are formed by the use of a substantial proportion of the residue of combustion of rice chaff. An insulating felt may comprise asbestos 5-10 per cent, silicate wool 20-40 per cent, product of combustion of rice chaff 50-75 per cent, with perferably traces of starch, fused silicates or the like as binding agents. In another example, a mixture of 10-40 per cent clay, 2 per cent granulated cork, and 88-58 per cent rice chaff residue yields a light porous material, from which the cork may be removed by combustion. Non- porous insulating material may be obtained by mixing rice chaff residue with a small proportion of clay, and may be applied externally to buildings to be insulated.
Patent GB-1224630-A (GB)
Title: Production of cycloalkenyl ketones
IPC: C07C45/73
Filed: 1968-07-03
Abstract: 1,224,630. Cycloalkenyl ketones. BADISCHE ANILIN- & SODA-FABRIK A.G. 3 July, 1968 [8 July, 1967], No. 31758/68. Heading C2C. Cycloalkenyl ketones are prepared by a process wherein a 1,3- diene compound is reacted with an aldehyde and a ketone having at least one H on the C atom adjacent the carbonyl group. The process is preferably carried out at elevated temperature and pressure and compounds which yield the diene and/or aldehyde starting materials under the reaction conditions may be used. In examples, butadiene or isoprene is reacted with formaldehyde and acetone at 275‹ C. and 300 atm. to yield methylcyclohexenyl-(3) ketone and methyl [methylcyclohexenyl-(3)] ketone. 1,224,641. 1,1,1 - Tribromo - 2,3 - dihydroxypropane. J. R. GEIGY A.G. 14 May, 1968 [15 May, 1967], No. 22792/68. Heading C2C. Novel 1,1,1-tribromo - 2,3 - dihydroxypropane is prepared by acid hydrolysis of 1,1,1-tribromo- 2,3-epoxy-propane. 1,1,1 - Tribromo - 2,3 - epoxypropane is prepared by reaction of bromal hydrate with diazomethane. Pharmaceutical compositions having sedative, hypnotic and soporific activity comprise, as active ingredient, 1,1,1-tribromo-2,3-dihydroxypropane, together with a pharmaceutically acceptable diluent or carrier.
Patent GB-430159-A (GB)
Title: Improvements in or relating to rotary pumps, vane motors, blowers, exhausters and like rotary engines
IPC: F04C14/22
Filed: 1933-11-15
Abstract: 430,159. Rotary engines; stuffing-box packing. GUINNESS, E. E., Allendale, Coalway Road, Wolverhampton. Nov. 15, 1933, Nos. 31813/33, 31814/33, 31815/33, and 29731/34. [Classes 110 (ii) and 122 (v)] A rotary engine or pump comprises a rotor 12 having outwardly-sliding roller vanes 39, in a slidable stator 11 which may be moved vertically through the action of cams 44 to vary the eccentricity of the rotor with regard to the stator. Diametrical passages 40 contain fluid under pressure to force the rollers outwards. Packing rings 35, of cast iron, bronze or leather, and others in the casing ends, are pressed upon by fluid acting along channels 37. Grooves 42 permit entry of fluid to the passages 40. The cams 44 may be replaced by a piston and cylinder, the piston being connected to the stator 11 and being under control of pressure fluid. Another method includes levers and screws connected by a common turnbuckle. Fig. 3 shows a sealing device on the shaft 16 in which an L-shaped leather washer 25 is pressed upon by a spring 28 acting through a disc 26. Figs. 4 and 5 show a vane pump with a rotor containing vanes 51 provided with rollers 53 in the tips. The vanes are pressed apart by fluid under pressure which passes down channels 56 in the vanes, and enters grooves 55. A control sleeve 57, mounted on the shaft 17, has a flange 58 carrying a pin 59 which engages a recess 60 in the stator end disc 49. An operating lever 61 is provided to slide the stator transversely to the rotor, or cams as in Fig. 1 may be used. The first Provisional Specification states that a centrifugal governor may control the position of the stator 52. The sliding clutch may be controlled through the medium of a hydraulic cylinder, with a trip gear for operating a valve when the stator housing has moved to a position of maximum eccentricity. An epicyclic gearing may be incorporated for reversing the direction of motion of the driven shaft.
Patent GB-1461886-A (GB)
IPC: C12R1/13
Filed: 1974-01-10
Abstract: 1461886 Viscous coupling control; changespeed control K E HANDKE 10 Jan 1974 [22 Jan 1973] 31908/76 Divided out of 1461885 Headings F2W and F2D The subject-matter of this Specification is identical with that described in parent Specification 1,461,885, but the claims are concerned with the electronic control of a pair of viscous couplings, one providing forward drive and one providing reverse.
Patent GB-194638-A (GB)
Title: Electrolytic iron
IPC: C25C1/06
Filed: 1921-12-22
Abstract: 194,638. Eustis, F. A. Dec. 22, 1921. Iron chlorides and sulphates.-A solution of ferric salts is electrolytically reduced in a tank G to the ferrous condition, and is then led to a lixiviating tank B containing iron oxide ore. The lixiviator may be kept at a temperature of 70‹ C. or above, and preferably works on the countercurrent principle. After filtration, most of the solution, which has taken up ferric salts from the ore, returns to the reducing tank G. The remainder is treated with scrap iron in a vat F and with limestone in a tank D to remove ferric salts and acid. It is then filtered, if necessary, and electrolyzed in a depositing vat A, the ferric solution obtained then returning to the electrolytic reduction tank G. Any acid lost during operations with a sulphate solution may be restored by treating the solution with sulphur dioxide, say in the reduction vat G. Sulphide ores may be treated, if of such character that reduction of a ferric solution does not readily take place in the lixiviator. Specifications 194,639 and 196,334 are referred to.
Patent GB-757524-A (GB)
Title: Improvements in and relating to the production of complex metal alkyls
Inventor: FULTON GEORGE ROBERT
IPC: C07F5/06
Filed: 1953-11-18
Abstract: Complex alkyls of aluminium and an alkali metal are prepared by reacting a complex aluminium-alkali metal hydride at elevated temperature and substantially in the absence of moisture and oxygen with one or more olefins containing not more than 12 carbon atoms of formula RCH=CH2 where R is hydrogen or alkyl in the presence of a Friedel-Craft catalyst as defined.  The catalyst should not decompose the complex hydride.  Suitable catalyst are aluminium halides, aluminium alkyl halides, ferric chloride and zinc chloride.  The reaction may be carried out at temperatures between 50 DEG  and 300 DEG  C.  Inert solvents such as n-octane, decalin and cyclohexane may form the reaction medium.  In an example, lithium aluminium hydride, aluminium chloride and propylene are reacted at 120 DEG  C. in an autoclave in the absence of air and moisture to give lithium aluminium tetrapropyl.  The Provisional Specification refers also to the application of the process to the preparation of complex alkyls of an alkali metal and boron, gallium, indium and thallium.
Patent GB-343904-A (GB)
Title: Improvements in electric driving sets
IPC: H02P7/34
Filed: 1929-10-22
Abstract: 343,904. Control of D.C. motors. ELECTRIC CONSTRUCTION CO., Ltd., Ingersoll House, Kingsway, London, TONKINSON, W., Bushbury Engineering Works, Wolverhampton, and DICK, M. S., 181, St. James' Road, Glasgow. Oct. 22, 1929, No. 32037. [Class 38 (iii).] Regenerative braking.- In a Ward Leonard control set a resistance R, which is normally shortcircuited by an electromagnetic switch S<1>, is inserted in the armature series circuit when the separately excited generator field 9<1> is disconnected from the supply A. The value of the resistance R is such that, while it will allow sufficient current to flow from the motor M to the generator G to permit of an adequate braking effect at the time of stopping, by allowing the generator G to absorb the major part of the available energy, it will also prevent the residual magnetism of the generator G causing, either, creeping of the motor M or building up of the generator series field g. The generator G is driven by an electric motor.
Patent GB-498220-A (GB)
Title: Improvements in and relating to permanent magnets
IPC: C22C38/14
Filed: 1937-11-20
Abstract: Permanent magnets are made from iron alloys containing 1-35 per cent of cobalt, 3-20 per cent of titanium, and up to 1,5 per cent of carbon, with or without up to a total of 25 per cent of one or more of the following: 2-20 per cent of copper, 2-18 per cent of aluminium, and 1-15 per cent of silicon.
Patent GB-337586-A (GB)
Title: Checks for doors, windows or other hinged members
IPC: E05C17/34
Filed: 1929-10-22
Abstract: 337,586. Elliott, A. Oct. 22, 1920. Stays; checks.-In a folding stay for doors or windows, one of the joints consists of two oppositely-dished members 10, fixed to the two 'arms 15, Fig. 3, with a lenticular resilient pad clamped between them by a bolt and hand-nut 12 so as to resist relative rotation between the parts. The device normally only damps the motion of the door, but may be tightened to hold the door against light pressure. In the form shown in Fig. 2, one dished part 2 fits into the other part 10, and the pad 9 is of substantially uniform thickness. The member 2 is carried by the door and the member 15 is connected to a rod 17 pivoted on the door-post. In this form the downward bending of the rod 17 produces an additional checking effect when the door is nearly closed. The nut 12 may be arranged to be slackened by operation of the door handle.
Patent GB-664904-A (GB)
Title: Improvements in milk churns
IPC: B65D23/14
Filed: 1949-12-14
Abstract: 664,904. Milk-churns. STOCKTON, R., STOATE, N. P., and DAIRY SUPPLY CO., Ltd. Dec. 14, 1949. No. 32058/49. Class 66. [Also in Group XV] A label fastening device as shown is welded or otherwise secured by the parts 15 to a milk churn. The parts 13 act as a staple for the attachment of a wire for securing the churn lid while the head 10 acts as a stud to hold the label.