baber/WOPTO huggingface dataset:
Patent GB-1147646-A (GB)
Title: Electrical inverters
Inventor: MORLEY ROBERT ERNEST
IPC: H02M7/519
Filed: 1965-07-08
Abstract: 1,147,646. Inverters. ROTAX Ltd. 4 July, 1966 [8 July, 1965], No. 28944/65. Heading H2F. An inverter has a transformer 5 with centretapped primary 11-12 connected through first thyristors 15, 16 and further thyristors 17, 18 to the D.C. source 1, 2. Additional thyristors or diodes 21a, 21b are connected as shown to additional primary windings. In normal operation each pair of first and further thyristors (15 and 17 or 16 and 18) are fired together. If the load current becomes excessive this is sensed by the unit 22 which prevents firing of the further thyristors 17, 18. Consequently the inverter continues to operate but now uses elements 15, 21a, 16, 21b and the whole primary winding 13-14, so that the fault current is reduced.
Patent GB-958571-A (GB)
Title: Improvements in or relating to pulse generators
Inventor: POOL WILLIAM JOHN
IPC: H03K5/145
Filed: 1959-08-25
Abstract: 958,571. Transistor pulse circuits. ELECTRIC & MUSICAL INDUSTRIES Ltd. Aug. 4, 1960 [Aug. 25, 1959], No. 28956/59. Heading H3T. A pulse generator comprises a first transistor 1 rendered conductive by an input pulse 15 so as to set a tuned circuit 7, 8 into oscillation, a second transistor 10 being rendered conductive to generate a pulse 17 when the circuit 7, 8 has executed one quarter cycle of oscillation 16. The emitters of the transistors 1, 10 are grounded and the resistance of the base circuits are sufficiently low to enable the transistors to operate with respect to D.C. conditions effectively as grounded base transistors and hence permit operation at higher temperatures. Pulse 15 is preferably provided by differentiating a longer pulse 4 by transformer 3. In an alternative arrangement, the emitter of transistor 1 is coupled to the base of transistor 10 by means of a series capacitor and shunt inductor. The input pulse to transistor 1 should now last until the output pulse 17 has been completed.
Patent GB-782084-A (GB)
Title: Process for the preparation of alkyl-aryl compounds
IPC: C07C2/68
Filed: 1955-10-12
Abstract: Alkyl-aryl compounds are prepared by reacting benzene with propylene in the presence of an acid reacting alkylation catalyst to produce a mixture containing mono-isopropylbenzenes, para- and meta-di-isopropylbenzenes and higher poly-isopropyl-benzenes, separating mono-isopropylbenzene as a desired product and also separating one or both of the di-isopropylbenzenes, and recycling the other aromatic compounds, the ratio of propylene to benzene being 0.7 to 1.5 mols. of propylene per mol. of benzene.  The catalyst is preferably aluminium chloride, hydrogen fluoride or boron trifluoride.  The reaction temperature may be in the range of 80-150 DEG  C. and the time from 0.1 to 10 hours.  In a typical example 25 parts of aluminium chloride, 480 parts of benzene, and 12.5 parts of isopropyl chloride are charged into a glass, ceramic or corrosion-resistant metal and propylene gas passed in over a period of 2 hours.  The mass is cooled to room temperature and then poured into 500 parts of water containing HCl and stirred and on standing the upper hydrocarbon layer is recovered, washed with caustic soda solution and then the cumene, and meta- and para-di-isopropylbenzenes recovered as separate products.
Patent GB-225870-A (GB)
Title: Improvements in twin-cylinder internal combustion engines
IPC: F02B25/00
Filed: 1924-12-05
Abstract: 225,870. Karner, R. Dec. 7, 1923, [Convention date]. Two-stroke-cycle engines; pumps.-In coaxial cylinder engines each cylinder is of two diametens, the larger part forming a pump chamber 1, 1<1>; air is drawn into each of these chambers through two sets of ports controlled by the composite piston. The pump chamber of one cylinder delivers to the combustion chamber of the other cylinder through a common pipe 7 in the middle of which is a carburettor 8. On each delivery a charge of air from the previous compression enters the combustion chamber in front of the mixture.
Patent GB-1441101-A (GB)
Title: Reagents for the assay of cardenolide glycosides and aglycones
IPC: B60J3/02
Filed: 1972-06-22
Abstract: 1441101 Cardenolide oximes WELLCOME FOUNDATION Ltd 21 June 1973 [22 June 1972] 29280/72 Heading C2U [Also in Division G1] The invention comprises compounds of formula wherein R<SP>1</SP>-R<SP>5</SP> are each H or OH, at least four being H, and the α-configuration being permitted to R<SP>2</SP> only when R<SP>1</SP>-R<SP>5</SP> are all H; B is alkylene; Z is OH or a group of formula wherein R is H or C 1-4  alkyl; A is a direct bond or an optionally substituted alkylene group; and X<SP>1</SP> and X<SP>2</SP> are each H or an iodine radioisotope, e.g. <SP>123</SP>I, <SP>124</SP>I, <SP>125</SP>I, <SP>126</SP>I, <SP>128</SP>I, <SP>129</SP>I, <SP>130</SP>I, <SP>131</SP>I, or <SP>132</SP>I. Compounds IX are prepared from the corresponding 3α- or 3#-ols by the successive steps of (a) oxidation to the 3-ones, e.g. with chromic acid, KHnO 4  or O 2 /Pt; (b) reaction with H 2 N-O-B-CO 2 H to give IX (Z=OH); (c) reaction with R-NH-A-C 6 H 4 -OH to give IX (Z=formula X; X<SP>1</SP>=X<SP>2</SP>=H); (d) radioiodination, e.g. using sodium radio-iodide with chloramine T. Compounds IX containing radioiodine are used as antigens in the radioimmunoassay of cardenolde glycosides and aglycones (see Division G1).
Patent GB-1377669-A (GB)
Title: Arrangement for reading the magnetic markings on pneumatic tube  dispatch carriers
IPC: B65G51/44
Filed: 1972-06-22
Abstract: 1377669 Pneumatic despatch apparatus INTERNATIONAL STANDARD ELECTRIC CORP 22 June 1972 [24 June 1971] 29313/72 Heading B8A A device fot sensing magnetic markings on the circumference of pneumatic tube despatch carriers, comprises sensing means and associated circuit elements arranged on an electrical circuit board with a circular cutout, the circuit boards being connected to one another by spacing members therebetween. A circuit board provided with sensing means is shown in the figure, having a central hole 16 for a tubular member of a non-magnetic material, sensing devices 18 (designed as printed circuit board components), diodes 19 and resistors 20 forming the associated circuitry. Edge contacts 17 form a connection between the board shown and a printed circuit board arranged normal thereto.
Patent GB-385058-A (GB)
Title: Improvements in and relating to mudguards for cycles and other vehicles
IPC: B60S1/68
Filed: 1931-10-22
Abstract: 385,058. Wheel scrapers. CHEVALLAY, A. J., 32, Rue Poliveau, Paris. Oct. 22, 1931, No. 29365. [Class 108 (ii).] A mudguard of a cycle or other vehicle is provided with a readily-detachable device for wiping mud from the rotating wheel tyre, such device comprising a flexible and yielding wiper or squeegee adjustable for wear relatively to a rigid backing or holder, which is spaced from the tyre and is itself adjustable to regulate the setting of the device as a whole relatively to the tyre. A mudguard 10 is provided with a tyre-wiping brush 9 or a rubber wiper mounted in a holder formed of plates 1, 5, the plate 1 being secured to a member 12 pivoted at 13 to a member 11 on the mudguard 10, so that the brush can be turned back out of contact with the tyre. The plate 1 has a slot 2 to permit adjustment on a screw stud 121 on the member 12. The brush 9 is adjustable in its holder by means of bolts 10<1> engaging slots in the plates 1, 5. An outturned flange 6 on the plate 5 prevents mud from being thrown through the slot 2. The stem of the forked member 11 is slotted to engage the mudguard 10 and is fastened thereto by a pinching-screw 11<1>.
Patent GB-1174498-A (GB)
Title: A Superconductor and Its Manufacturing Method.
Inventor: HASHIMOTO UICHI
IPC: H01L39/14
Filed: 1967-06-26
Abstract: 1174498 Super-conductors U HASHIMOTO 26 June 1967 [25 June 1966] 29381/67 Headings H1A A5 and A4D A super-conductor element suitable for use in the windings of a super-conducting magnet is formed by reacting molten gallium at a temperature between 500 and 800C with the surface of a base material containing at least 50 atomic per cent of vanadium to form a layer of vanadiumgallium alloy containing more gallium than the stoichiometric compound V3Ga, and heating the resulting material at a temperature between 600 and 860C to form a layer of V 3 Ga between the base material and the gallium-rich layer. One or more of tantalum, zirconium, titanium and biobium may replace part of the vanadium in the base material and the gallium may be partly substituted by at least one of indium, arsenic, antimony, thallium and germanium. The rate of formation of the V 3 Ga layer may be greatly accelerated by coating, e.g. electro-plating, the gallium rich layer with copper or silver prior to the second heat treatment. The effect on the properties of the resulting product of using various treatment temperatures within and outside the ranges specified above is discussed in detail in the Specification. In the embodiments the reaction with molten gallium is effected in a continuous process in an evacuated chamber, the vanadium in wire or ribbon form being passed either through successive vertically arranged crucibles or through a U-shaped crucible containing gallium, and then through a furnace. After being copper or silver plated the resulting wire is heat-treated in a batch or a continuous process.
Patent GB-1520597-A (GB)
Title: Diazo dyes
IPC: C09B62/82
Filed: 1976-07-15
Abstract: The reactive disazo dye of the formula (I) or its copper complex is prepared by condensing an appropriate aminodisazo compound of the formula (II) as such or in the form of its copper complex with an appropriate triazine compound. If desired, the product obtained is further condensed with an appropriate amine or alcohol. If the compound of the formula (II) is not used in the form of its copper complex, the conversion to the copper complex is carried out after each condensation stage. <IMAGE>
Patent GB-190856-A (GB)
Title: Improvements in or relating to burners and burner fittings
IPC: F23D14/30
Filed: 1921-11-04
Abstract: 190,856. Kempton & Co., Ltd., C. H., and Kempton, C. H. A. Nov. 4, 1921. Globes; shades; globeholders.-In inverted incandescent gas fittings, the globe is directly attached to the burner tube and is provided at its upper portion with openings for the escape of the combustion products, and at its lower portion with an air-inlet opening or openings. In one form, the bell-shaped globe a, preferably constructed of silica or other refractory vitreous material, has a hole for the burner tube b, together with the ventilation openings a<3>, provided in its upper portion, a reinforcing collar a<2> surrounding the hole. The globe a is movable vertically, and rests loosely on the burner mouth b<1>, which is screwed on the burner tube b. In another form, the globe may be clamped in position between the lower part b<3> of the upper burner fitting and a nut screwing on the upper portion of the burner tube b. The globe may be provided with a deflector d formed of enamelled iron, silica, or other fireproof material. The globe may be made large to accommodate a cluster of burners. Specification 2110/97 is referred to.
Patent GB-974723-A (GB)
Title: Light sensitive gelatino-silver halide photographic emulsions
IPC: G03C1/30
Filed: 1963-07-25
Abstract: 974, 723. Photographic silver halide emulsions. KODAK Ltd. July 25,1963 [July 25, 1962], No. 29442/63. Heading G2C. A photographic gelatino-silver halide emulsion is hardened with a compound of the formula where R2 is an alkyl group of up to 4 carbon atoms, X is halogen and Y is -NR2 or halogen. The compounds also may act as antifoggants. In the examples dimethylaminophosphoryldichloride and bis- (dimethylamino)phosphorylchloride and the corresponding fluorides and diethylamino compounds are used.
Patent GB-794965-A (GB)
Title: Process for the preparation of indole and homologues thereof
Filed: 1956-09-26
Abstract: Indoles of the formula: <FORM:0794965/IV (b)/1> where R and R1 are H or C1-C6 alkyl are prepared by treating diarylformamidines of the formula: <FORM:0794965/IV (b)/2> with an alkoxide R2OM (R2 being alkyl or cycloalkyl and M an alkali metal) and converting the alkali metal derivative of the indole so obtained into the free base, e.g. by treatment with water.  The formamidine is prepared from the arylamine and ethyl orthoformate (with a trace of hydrochloric acid as catalyst) an excess of the arylamine being used as solvent and retained as such for the indole condensation.  Similarly the metal alkoxide is made in excess of alcohol and used as such.  In the examples there are prepared (1) N:N1-di-(o-tolyl)-formamidine, potassium cyclohexanolate and indole therefrom; and (2) N:N1-di-(o-ethylphenyl)-formamidine and 3-methylindole.
Patent GB-1127540-A (GB)
Title: Catalytic process for polymerization
IPC: C08F10/00
Filed: 1967-06-27
Abstract: 1,127,540. Chromium alcoholates. NATIONAL DISTILLERS & CHEMICAL CORP. 27 June, 1967 [27 June, 1966], No. 29515/67. Heading C2C. [Also in Division C3] A compound of the formula where R is an alkyl, aryl or arylalkyl radical, is made by (1) reacting R 3 CCl with Ag 2 CrO 4  or (2) reacting chromium trioxide with a triarylcarbinol in a solvent such as methylene chloride, carbon tetrachloride, chloroform, hexane, octane, cyclohexane, decahydronaphthalene or mixtures. In Example I, chromium trioxide and triphenylcarbinol admixed in methylene chloride are heated at 41‹ C. for 30 minutes, the unreacted chromium trioxide filtered off, and bis(triphenylmethyl) chromate recovered from the filtrate. In Example II, the reaction is as in Example I, except that triphenyl carbinol is replaced by tributyl carbinol.
Patent GB-1175496-A (GB)
Title: Aerodynamic Pressure-Wave Machine
Inventor: WINKLER KURT
IPC: F02B33/42
Filed: 1968-06-20
Abstract: 1,175,496. Pressure exchangers. BROWN, BOVERI & CO. Ltd. June 20, 1968 [June 21, 1967], No.29561/68. Heading F1N. The rotor of a pressure exchanger comprises an inner cylindrical hub 1 and an outer cylindrical shroud 2 joined together by cell walls 3 each having two curves, one curving away from one side of a radial line A passing through one or both of the fastening locations between the cell wall and the hub 1 or shroud 2, and the other curving away from the other side of the radial line. The shape of the curves is preferably arranged so that the resultant moment of centrifugal force about the fastening location is substantially zero. The fastening locations may be, as shown, located on the same radial or, Figs. 2 and 3 (not shown) on different radials. The amount of curvature of the walls may vary in the axial direction.
Patent GB-774113-A (GB)
Title: Improvements in or relating to automatic gain control circuits for television receivers
Inventor: BILLIN JAMES JOHN
IPC: H04N5/52
Filed: 1953-10-27
Abstract: 774,113. Automatic gain control. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Oct. 15, 1954 [Oct. 27, 1953], No .29617/53. Class 40(5) In a television receiver an A.G.C. voltage is derived by adding inverted synch. pulses to the complete video signal, so that the minimum amplitude in the combined signals corresponds to minimum vision modulation. The complete video signal, in which synch. pulses are 'positive going, is fed from video amplifier 1 to the grid of a grid-current biased synch. separator 5, via a series resistor 4. The complete video signal is also fed to a rectifier 13 via resistor 14, which may alternatively be connected to point B. Inverted synch. pulses of amplitude equal to or greater than that of the pulses in the complete video signal are also fed, to the rectifier 13, via resistor 12, from the anode of the synch. separator 5. The minimum amplitude at the anode of the rectifier 13 then corresponds to black level '(Figs. 5, 6 not shown). The cathode of rectifier 13 is returned to a suitable negative sourceas shown, the grid circuit of a line scanning amplifier 16-via resistor 16, and the A.G.C. voltage is obtained across smoothing condenser 17. A contrast control may be obtained by connecting the anode of rectifier 13 to a variable positive bias source 18. Alternatively, a variable resistor may be used in the cathode circuit of the synch. separator 5, Fig. 7 (not shown). In this case the grid leak 20 and screen potentiometer resistor 9 are returned directly to the cathode: the grid leak 20 may alternatively be returned to the screen grid. In another embodiment, Fig. 8 (not shown) the resistor 14 is connected to the anode of the amplifier 1 via a blocking condenser, a separate diode D.C. resistor being used to set the D.C. level in the signal applied to the rectifier 13. In this arrangement contrast control is obtained bv variation of the cathode bias of the D.C. restorer. Specification 484,202 [Group XL] is referred to.
Patent GB-421849-A (GB)
Title: Improved expanding kerb
IPC: F24B1/198
Filed: 1933-10-26
Abstract: 421,849. Fenders; stands for fireirons. SNELL, A. G., Ashdown's Works, Aldridge Road, Perry Barr, Birmingham. Oct. 26, 1933, No. 29641. [Class 126] In an expanding kerb, the parts of which are moulded from powdered material such as synthetic resin, the centre part c is formed with longitudinal bearing-ribs or slideways d against which bear the end portions a, of which one only is shown in Fig. 2, which is an inverted plan. In the construction shown, the centre part also has vertical ribs f bearing against the end parts, and is provided with a slotted clamping-strip k secured to a central boss h. The end portions carry screwed pins which project through the slots and are clamped by nuts to the strip to maintain the parts in the adjusted position. The edges of the strip are turned up, and engage between shallow ribs q on the end portions, to assist in rendering the kerb rigid. Moulded ornaments, such as corner caps, or the fire-iron-supporting bracket shown in Fig. 7, are provided with a locating- peg r engaging in a recess formed in the top of the kerb, and have a fastening screw s moulded in them. The bracket shown has a moulded tray u secured to the top, carrying a series of metal arms v on which fire-irons may be hung, and preferably having an ash-tray fitted in it.
Patent GB-488488-A (GB)
Title: Improvements in and relating to telephones
IPC: H04M1/57
Filed: 1936-11-02
Abstract: 488,488. Automatic exchange systems. BENEDETTI, A. DE. Nov. 2, 1936, Nos. 29783 and 29784. Convention dates, Oct. 31, 1935 and Aug. 14, 1936. [Class 40 (iv)] Apparatus is provided at a substation for transmitting the calling party's number to the called party before conversation can take place. The number may be sent by voice currents picked up from a magnetic or other record, or by impulses generated at springs controlled by a toothed disc. In the former case the number is heard in the called party's receiver, while in the latter case it controls a step-bystep indicator. The operation is started by the actuation of a knob by the calling party or by a relay which responds to a backward A.C. signal transmitted when the called party removes his receiver, and the calling party's microphone is short-circuited until the completion of the operation. In Fig. 1, after the connection has been obtained, the knob Y is depressed to release a disc I which carries a steel wire or ribbon record XO, XI, and the number is picked up as the disc rotates by a magnet inserted between the points e, e<1>. At the end of the movement, a lever K is actuated by a projection on the disc to remove the short-circuit from the microphone m. The disc I is restored at the end of the conversation by the return of the switchhook g. On an incoming call, the lever K is actuated by a relay R1 which responds to ringing current and locks in a direct current circuit, or alternatively the action may be performed by the magnet of the bell. When the number is sent by impulses, pulsating current may be used by the inclusion in the circuit of a tuning fork or other interrupter. In Fig. 8, a backward signal operates a relay R which connects up a releasing magnet Z and locks until it is released by the movement of the lever K. At the called substation, numerical impulses operate a magnet E, Figs. 6, 7, which is connected in circuit by a relay R1 responsive to ringing current and thereby control a number wheel i. In Fig. 7, separate number wheels for the several digits are brought successively under control of the magnet E by a relay M which is connected up at each train by a slowrelease relay RR. A switch is provided for connecting the line alternatively to the relay R1 and to the set. The Specification as open to inspection under Sect. 91 includes also an arrangement in which the apparatus is associated with the calling line at the exchange. The number sending operation is started and the calling line is short-circuited by a relay which responds to ring-back tone and locks until the operation is completed. This subject-matter does not appear in the Specification as accepted.
Patent GB-476976-A (GB)
Title: Improvements in belt fasteners
IPC: F16G3/04
Filed: 1936-11-03
Abstract: 476,976. Belt fastenings. WARBY, A. E., and BELT-FASTENERS, Ltd. Nov. 3, 1936, No. 29883. Drawings to Specification. [Class 80 (i)] In a belt-fastener of the type comprising C-shaped wire hooks, each hook is of extruded metal having an oval or elliptical section with the long axis of the oval or ellipse lying in the plane of the hook.
Patent GB-764317-A (GB)
Title: Manufacture of compounds of the steroid series with oxygen in 11-position
IPC: C07J5/00
Filed: 1951-12-20
Abstract: The invention comprises 9 : 11-oxido-steroids, the rings B and C of which are represented by the formul  <FORM:0764317/IV(b)/1> <FORM:0764317/IV(b)/2> and their preparation by reacting a D 7 : 8, 9 : 11-steroid with a peroxide, e.g. monoperphthalic acid, perbenzoic acid or hydrogen peroxide.  The reaction may be effected in an organic solvent, e.g. a halogenated hydrocarbon or ether.  Examples describe the use of the following starting materials: D 7 : 8, 9 : 11, 22 : 23-3b -acetoxy - ergostatriene, D 7 : 8, 9 : 11 - 3b  - acetoxy - cholestadiene, D 7 : 8, 9 : 11 - 3b ,20 - diacetoxy - allo - pregnadiene, D 7 : 8, 9 : 11, 22 : 23 - 3b  -acetoxy - stigmastatriene and D 7 : 8, 9 : 11 - 3b ,17b  - diacetoxy-androstadiene.