baber/WOPTO huggingface dataset:
Patent GB-291225-A (GB)
Title: Improvements in or relating to electric supply systems, particularly for energising radio receiving apparatus from supply mains
IPC: H02J7/02
Filed: 1927-05-25
Abstract: 291,225. Igranic Electric Co., Ltd., Wright, S. R., and Currah, L. E. May 25, 1927. Charging batteries. -A system for supplying wireless receiving sets from alternating current mains m1, m2 comprises two rectifiers v1, v2 and a control member C, so arranged that, when the control member is in the off position the rectifier v2 supplies current to the accumulator. The winding b3 of a circuit breaker b1 is energized by the accumulator when the control member is in the off position and when the electromotive force exceeds a predetermined amount the armature b2 breaks the primary circuit of the transformer T to interrupt the charging.
Patent GB-929634-A (GB)
Title: Improvements in or relating to the manufacture of bottles from thermoplastic materials
Inventor: WHITBOURN KENNETH JOSEPH
IPC: B29C49/50
Filed: 1959-12-21
Abstract: The subject-matter of this Specification is identical with that described in Specification 929,633 but the claims differ.
Patent GB-638197-A (GB)
Title: Safety bar for doors
IPC: E05C21/02
Filed: 1948-05-25
Abstract: 638,197. Multiple fastenings. COAKLEY, F. J. May 25, 1948, No. 14116. [Class 44] A safety bar for doors, of the kind described in Specification 590,723 is adapted for use with double leaf doors by making the bar in two parts g, g<SP>1</SP> adapted to be automatically coupled together when the door is closed. In one construction, a pin z on the bar g carried by one leaf a enters a recess y at the end of the bar g<SP>1</SP> carried by the first closed leaf al ; when the bolt e is shot, the connected ends of the bars are located under the strap n. In another form, Fig. 4, the adjacent ends of the bars are rebated, to overlap, and a horizontal pin z<SP>1</SP> on one bar enters a hole y<SP>1</SP> in the other.
Patent GB-970024-A (GB)
Title: Preparation of tetrachloroxylylenediamines
Filed: 1963-04-09
Abstract: A tetrachloroxylylenediamine is made by aminating the corresponding tetrachloroxylylene dichloride with liquid ammonia at a temperature of at least 20 DEG C., e.g. 20-90 DEG C., under super-atmospheric pressure sufficient to keep the ammonia in liquid form, say 100-700 p.s.i.g. The product is a mixture of ortho, meta and para isomers and the meta-isomer may be separated by treating the mixture with aqueous hydrogen chloride to dissolve the meta-isomer and separating the solution from the ortho- and para isomers.  The meta-isomer is then re-precipitated with NaOH. The starting material may be made by dissolving xylene in a solvent, such as carbon tetrachloride, adding iron, ferric chloride, or a mixture thereof, introducing chlorine while excluding light at a temperature in the range 30-90 DEG C. until the theoretical amount of hydrogen chloride has been evolved and separating tetrachloroxylene. This product is dissolved in a solvent and chlorine is introduced while under the influence of light and in the absence of iron catalyst at a temperature in the range 30-90 DEG C. until the theoretical amount of hydrogen chloride, for replacement of two hydrogens by chlorine has been evolved and the tetrachloroxylylene dichloride is separated.  Detailed examples are given.
Patent GB-934375-A (GB)
Title: Improved fuel compositions
IPC: C10L1/18
Filed: 1960-04-22
Abstract: A fuel composition for use in spark ignited internal combustion engines comprises (a) a hydrocarbon mixture having a research octane number of at least 90 and containing at least two hydrocarbon types selected from paraffins, naphthenes, olefins and aromatics, (b) an organometallic antiknock agent in an octane number improving amount which is at least 1 cc. per U.S. gallon of fuel if tetraethyl lead or not more than 2g. of manganese per U.S. gallon if methyl cyclopentadienyl manganese tricarbonyl and (c) a co-antiknock compound selected from <FORM:0934375/III/1> and <FORM:0934375/III/2> in an amount not less than 0,1% by volume and not more than 1% by wt. of carbonyl based on the fuel wherein n is 1 or 2, each R1 is a C1-C10 alkyl, aryl, cycloalkyl, alkylaryl, arylalkyl, or alkyl having 1-3 fluorine atoms on the terminal carbon, group, each R11 is hydrogen or an alkyl, aryl, arylalkyl, alkylaryl, cycloalkyl, cycloalkylalkyl or alkylcycloalkyl group, and R111 is a C1-C6 alkyl, aryl or cycloalkyl group.  Other specified organo-metallic antiknock agents are tetra-n-propyl lead, cyclopentadienyl nickel nitrosyl, tris(acetylacetonate)-rion, -nickel or -cobalt, iron-, cobalt-or nickel-2-ethyl salicylate, bis(n-butyl salicyaldimine) nickel and vanadium acetylacetonate.  Optional additives include dye, ethylene dibromide, ethylene dichloride, tricresyl phosphate, dimethyl xylyl phosphate, diphenyl cresyl phosphate, alkyl boronic acids, lower alkyl phosphates and phosphites, ditertiarybutyl-4-methyl phenol, N,N1-disalicylal-1,2-propanediamine, polymerized linoleic acids and N,C-disubstituted imidazolines.  Antiknock additives may comprise mixtures of the organometallic and carbonyl compounds in a weight ratio of 1,2-2,2 parts of carbonyl per part by weight of tetraethyl lead or 60-110 parts of carbonyl per part of manganese in methyl cyclopentadienyl manganese tricarbonyl.
Patent GB-475272-A (GB)
Title: Improvements in moulds for precast concrete blocks and like units
IPC: B28B7/00
Filed: 1936-05-20
Abstract: 475,272. Moulds for concrete blocks &c. NAYBRO STONE, Ltd., and COE, T. May 20, 1936, No. 14259. [Class 87 (ii)] [Also in Group X] A metal mould for precast concrete blocks and the like comprises an open-ended, channelshaped body a and two detachable end plates b which slidably engage the body a with a tongue - and - groove connection. External reinforcing bars c on the sides of the body have downward extensions c<1> providing tongues for engagement with inturned flanges b<2> on upright edges b<1> of the plates b. The extensions c<1> and flanges b2 may be vertically inclined so as to provide a wedging action. Each plate b may be provided with a bar d having handles d<1>. Angle bars arranged transversely on the inner faces of the plates b serve as stops engaging the bottom of the body a. The plates b are extended beyond the stops to form supporting feet for the mould. The concrete block may be reinforced by rods h supported in detachable sockets f mounted in sleeve bearings g in the plates b, the rods being secured in the sockets and bearings by detachable pins.
Patent GB-496139-A (GB)
Title: Improvements in or relating to alternating current machines
IPC: H02K19/12
Filed: 1937-05-24
Abstract: 496,139. Synchronous motors. BLUMLEIN, A. D. May 24, 1937, No. 14443. [Class 35] A negative resistance such as an exciter with a series field winding is applied to the excitation winding of an induction starting synchronous motor, and the effective resistance of the excitation circuit is adjusted to a positive finite value less than the resistance of the excitation winding alone for reducing the slip before applying the continuous exciting current for synchronizing the motor. In the forms shown, the three or two phase motor secondary windings 18 are connected to starting resistances 20 and to exciters with series field windings 21. In the form shown in Fig. 3, one brush is lifted when the oscillation of the pointer of the centre zero ammeter 23 is very low and the resistance 20 is further reduced so that the exciter excites as a D.C. machine and the motor synchronizes. In Fig. 4 a pair of brushes is lifted, the exciter thereafter supplying current to the motor. As an alternative to the arrangement shown in Fig. 3, there may be an exciter in series with each phase of the secondary winding. In another form where the motor has an exciting winding as well as an A.C. winding on the secondary, a single compound wound exciter is used and the adjustable shunt winding may assist or oppose the series winding. The series winding may be short-circuited during the initial starting period. The series resistance must be variable in small steps. Specifications 167,242, 172,603, and 217,175, [all in Class 35], are referred to.
Patent GB-508131-A (GB)
Title: Improvements in or relating to keys for securing rails to chairs and the like
IPC: E01B9/58
Filed: 1938-05-16
Abstract: 508,131. Chair keys for railway rails. ULDALL. P. May 16, 1938, No. 14585. [Class 104 (ii)] A key for securing rails to chairs &c. comprises a U-shaped plate 4 fitting wedge-wise between the head and flange of the rail, and slightly wider at the bottom 7 than at the tcp 6. The sides of the plate engage the edges of the chair jaw 16, and have slots 12 through which passes a U-shaped wedge 19, abutting at its edges on the chair jaw and plate 4 to force the latter against the rail. The wedge may be secured by a key 23 inserted in one of a number of slots 22, or by turning the ends outwards like a cotter pin.
Patent GB-851586-A (GB)
Title: Improvements in or relating to reservoir writing or drawing instruments
Inventor: SMITH EDGAR PETER
IPC: B43K5/18
Filed: 1959-04-30
Abstract: 851,586. Reservoir pens. CUSHMAN & DENISON CO. Ltd. April 30, 1959, No. 14805/59. Class 146(3). A reservoir pen comprises a barrel 10 constituting the ink reservoir and having frictionally held within its forward end a sealing member 11 of moulded plastic formed with an aperture and constituting a valve seat, a valve 14 normally urged forwards towards the seat by a compression spring 17, and a nib holder 19 secured to the front end of the barrel and having a passage in which is slidably accommodated a. fibrous nib 23 not connected to the valve but having its rear end in abutting relation therewith. The barrel 10 is of aluminium and the parts 11, 19 may be of polythene. The valve 14 consists of a screw whose head 15 co-operates with the bevelled edge 13 of the aperture in the sealing member 11. The fibrous nib 23 has a circular washer 24 secured to its rear end which abuts against the front end of the screw. The nib is replenished with ink by pressing it inwards so that the screw head 15 is lifted off its seat 13 and ink is allowed to flow from the reservoir through the aperture in the sealing member 11. A cap 26 is provided for the nib. Instead of having the washer 24 the nib may be formed with an integral cross-piece. The valve 14 may consist of a plain counter-sunk head rivet instead of a screw in which case the spring 17 is secured thereto by a spring clip. A plug may be provided at the rear end of the barrel so as to enable the reservoir to be refilled. Specification 740,802 is referred to.
Patent GB-667666-A (GB)
Title: Deflection system for cathode ray tubes
IPC: H04N3/26
Filed: 1948-06-01
Abstract: 667,666. Cathode-ray tubes. SYLVANIA ELECTRIC PRODUCTS, Inc. June 1, 1948 [June 3, 1947], No. 14826/48. Class 39 (i). The electron gun comprises both spherical and cylindrical lenses which can be energized in dependence upon deflection of the beam to modify the beam cross-section to correct for distortion consequent on scanning. The screen may be fluorescent, photo-electric or a mosaic. In a tube having vertical deflecting plates 14, Fig. 3, and a gun 18 comprising cathode 20, control grid 22 and focusing electrodes 26, 28, 30, the spherical and cylindrical correcting means 32 comprises electrodes 28 and 30 and the plates 36 connected together. The deflecting source 38 is connected to rectifying, waveshaping and amplifying circuits 42, 44, whereby correcting voltages, dependent upon the deflect-. ing voltages, are superimposed on the positive electrodes. The plates 36 are connected to the wall coating 46 and to the mid-point of a potentiometer across the deflecting voltage source 38. With no deflection, the potential on anode 30 is the same as that of electrodes 36. With deflection, the potential on anode 30 is lowered relative to electrodes 36 to decrease the beam convergence in the vertical plane, and the consequent spherical aberration is corrected at the same time by adjustment of the potential on electrode 28. The plates 36 may be arranged so that the slit is parallel or at right angles to the direction of deflection; or they may precede the focusing electrode 26. In another form, a tube having deflecting coils 48, Fig. 6, is provided with flat coils 58 to produce a correcting cylindrical magnetic lens which may coincide with the spherical electrostatic lens 55, 56. A wave shaper 62 and shaping, amplifying and rectifying means 64, connected to the deflecting voltage source 60, provide currents and voltages which are superimposed on those in coils 58 and on electrodes 55, 56 respectively to adjust the spherical and cylindrical focusing. The electrostatic focusing electrodes may be replaced by an axial magnetic coil, and further coils 58 may be provided in association with the horizontal deflecting coils. Where crossed electrostatic and magnetic deflecting fields are used, correction may be provided only for the larger distortion caused by the electrostatic plates. Three pairs of semi-circular plates 122, 124, 126, Fig. 7, may be used with two pairs of deflecting plates 100, 104. Alternatively, plates 126 may precede plates 122, 124. Electrodes 122, 126, the deflection systems, the wall-coating and also the anode 116 are connected to the potential source 121. Circuit arrangements 134, 138, 140 modify the deflecting voltages from sources 130, 132 to apply correcting voltages to the electrodes.
Patent GB-1382246-A (GB)
Title: Battery charging circuits
IPC: H02J7/02
Filed: 1971-05-14
Abstract: 1382246 Charging batteries SEVCON Ltd 12 May 1972 [14 May 1971] 14962/71 Heading H2H A circuit for charging a battery having a terminal voltage higher than that of the supply source comprises means whereby energy can be stored in the inductive content of the circuit which energy is then supplied to the battery. A battery 21 is arranged to be charged from a source 1 by way of an inductor 3 and a thyristor 15, the battery having a terminal voltage higher than the voltage of the source. When a thyristor 9 is rendered conductive a capacitor 7 charges up to a given voltage whereupon thyristor 9 extinguishes. Thyristors 5, 11 are now rendered conductive whereupon the charge on the capaci-  tor 7 is reversed and the thyristor 11 extinguishes. At the same time a gradually increasing current flows in the inductor 3 by way of the thyristor 5. The thyristor 9 is again rendered conductive to whereupon the capacitor 7 causes the thyristor 5 to extinguish and the capacitor 7 recharges from the source 1. When the charge on the capacitor reaches a given value a diode 27 becomes forward biased and a transistor 29 turns on causing a second transistor  31 to turn on. Turning on of this transistor 31 causes a current pulse to flow in the primary winding 33 of a transformer from a stabilized current source 37. A pulse is thereby induced in the secondary winding 39 of the transformer such as to cause conduction of the thyristor 15 thus to allow the energy stored in the inductor 3 to be passed to the battery 21, the cycle then being repeated. The control circuitry for switching the thyristors 5, 9, 11 into conduction is as described in Specification 1,301,852.
Patent GB-507264-A (GB)
Title: Improvements in and relating to turbines
IPC: F01D25/00
Filed: 1938-05-19
Abstract: 507,264. Elastic - fluid turbines. KOHLER, G., and BRAGARD, T. May 19, 1938, No. 14977. [Class 110 (iii)] The rotor 4 of a radial-flow turbine may be moved axially until the fixed and moving blades are unmeshed so as to facilitate the removal of the upper half of the casing 1. Spaces 8 are left between the rotor discs 5 and the unbladed sides of 'the guide discs. The space behind the last disc may be sealed by a labyrinth packing 7 and used as an end thrust balancing device. In a modification, Fig. 4, the front of the first rotor disc is fitted with a labyrinth packing and used as an end thrust balancing device; this arrangement lessens the leakage across the gland 9. The guide and rotor discs may be made integral with the casing and rotor shaft, the guide discs having radial expansion joints and being bolted together in a plane at right-angles to the turbine axis, to prevent casing distortion.
Patent GB-209672-A (GB)
Title: Improvements in closures for jars and the like
IPC: B65D55/08
Filed: 1923-06-08
Abstract: 209,672. Armstrong, J. V., (Phoenix- Hermetic Co.). June 8, 1923. Lids, screw and bayonet joint; sealing-devices for closures.-In a closure for jars, &c. and comprising a metal sealing band 7, Fig. 9, and a cover 6 formed with internal projections 8 adapted to engage interrupted screw-threads 5 on the jar, the lower edge 15 of the band is turned inwards into engagement with a shoulder 3 on the jar and draws the cover 6 downwards on to the jar to prevent longitudinal movement between the band and the jar. In the sealed position, the projections 8 are drawn away from their corresponding threads 5 as shown. In a modification, the band 21, Fig. 12, engages an outwardly-turned head 20 formed at the lower edge of a screw cap 17.
Patent GB-150888-A (GB)
Abstract: 150,888. Cohen, E. Aug. 11, 1919. No Patent granted (Sealing fee not paid). Guarding against unauthorized use. - An antithief device consists of a two-part shackle member adapted to embrace and be locked to the tyre and rim and fitted with a projection provided with a knife or plunger; if the vehicle be driven when the device is locked to the wheel, the tyre is punctured and the projection causes the wheel to bump. The members a, bare pivoted at a<1> and are locked round the rim f and tyre g by a lock c. The member b is fitted with a pyramidal projection e provided with a spring plunger h.
Patent GB-272246-A (GB)
Title: Improved process for the electrolytic extraction of pure aluminium from crude aluminium, alloys and the like
IPC: C25C3/24
Filed: 1927-06-07
Abstract: 272,246. Aluminium-Industrie Akt.- Ges. June 7, 1926, [Convention date]. Electrolytic furnaces. - Aluminium is refined by electrolysis of a molten electrolyte in a furnace in which the impure aluminium in the solid state is connected as anode and the pure aluminium is deposited on to a solid cathode. The process is preferably carried out in closed vessels and under pressure in order to prevent absorption of moisture by the electrolyte and loss by sublimation of the electrolyte. Specification 265,170 is referred to.
Patent GB-1224634-A (GB)
Title: Carburetters for internal combustion engines
Inventor: SWATMAN PETER PHILLIMORE
IPC: F02M9/08
Filed: 1968-03-29
Abstract: 1,224,634. 634. Spray carburetters. BRITISH MOTOR CORP. Ltd. June 6, 1969 [March 29, 1968], No.15192/68. Heading F1B. In a carburetter having a metering needle 14, upstream of a fuel discharge orifice 12, controlled in dependence upon the position of a cylindrical suction-operated air choke member 11 maintaining a substantially constant depression at the fuel discharge orifice, the choke member is rotatably mounted in ball-bearings 19. The ball-bearings are mounted in plates 21, adjustable relative to the housing 20 to set the working clearance of the choke member 11 in the housing bore. The suction in the mixture passage 10 is transmitted to the spring-biased diaphragm 25 which is connected to a pin 24 mounted eccentrically on a gear wheel 22. The gear wheel 22 is mounted coaxially on the choke member 11 and engages a rack 23 to which the needle 14 is attached. A temperature-responsive bi-metallic strip may be interposed between the rack 23 and needle 14. Emulsifying air is fed to an orifice 17 set by an adjustable screw 18. The air choke 11 may be operated by a bellows or piston subjected to the suction. (For Figures see next page)
Patent GB-1500414-A (GB)
Title: Low radiation crucible
IPC: C23C14/24
Filed: 1975-04-14
Abstract: 1500414 Electric resistance heating XEROX CORP 14 April 1975 [26 April 1974] 15230/75 Heading H5H [Also in Division F4] An open boat crucible 10, particularly for vacuum deposition, has its bottom surface provided with a thin layer of gold 23 having a thickness of at least 600 Angstrom units, said layer of gold serving to reduce by reflection the infra-red radiation emitted through the back of the crucible. The main body 20 of the crucible, which is formed with a shallow cavity 11 for holding an evaporative charge, is made of tantalum, molybdenum, columbium or stainless steel, the cavity being coated with a layer of SiO. As shown, the bottom surface of the crucible is first coated with a layer 22 of potassium silicate and then overcoated with a layer 23 of gold applied by electro- or vacuum deposition. To assist adhesion of the gold, a thin chromium layer may be applied to the potassium silicate coating prior to the deposition of the gold, the maximum thickness of the chromium layer being 200 . The crucible has end plates 13 and 14 provided with slots 15 adapted to be connected to a source of electrical power for resistance heating and/or for bolting a plurality of crucibles together (see Fig. 2, not shown).
Patent GB-666912-A (GB)
Title: Improvements in duplex telephone transmission systems
IPC: H04M9/08
Filed: 1949-06-08
Abstract: 666,912. Two-way transmission. GENERAL ELECTRIC CO., Ltd., JONES, A. F., and HORMAN, C. W. April 4, 1950 [June 8, 1949], No. 15261/49. Class 40 (iv). In a two-way telephone system the terminal equipment comprises an amplifier for each direction and a saturable reactor in each path controlled by the anode current of a valve in or associated with the opposite amplifier, which valve is cut off by speech in the opposite path. The reactors T7 and T3 are normally saturated so that both paths are attenuated, outgoing currents up to a predetermined threshold value cancelling out in the two primaries of T4. Speech currents from the microphone, after amplification in valves' V6 and V7, are applied both to a transformer T2 and via a potentiometer Z1 and a valve V3 to produce a cut-off bias in a line 3 connected to the grid of a valve V2 in the receive amplifier. The cutting off of the valve V2 unsaturates the reactor T3 which unbalances the currents in the primaries of T4 so that speech currents pass to line. Incoming speech produces a negative bias on the grid of valve V7 and in consequence removes the shunting effect of reactor T7 from the loud-speaker. Specification 247,612, [Class 40 (iv)], is referred to.
Patent GB-437824-A (GB)
Title: Improvements relating to the manufacture of azo dyestuffs
IPC: C09B41/00
Filed: 1934-05-22
Abstract: Azo dyes are made in substance or on the fibre by subjecting to treatment with nitrous acid in presence of water mixtures containing aromatic nitrosohydroxylaminates and coupling components, resistant to nitrous acid under the reaction conditions.  The nitrosohydroxylaminates are converted into the corresponding diazo compounds.  In examples: (1) an alkaline solution of sodium phenyl-, o-tolyl- or a -naphthylnitrosohydroxylaminate, sodium nitrite and sodium 2-naphthol-3-carboxyanilide (which is stable) is acidified to yeild the corresponding azo dye; (2) cotton is impregnated with a solution containing sodium a -naphthylnitrosohydroxylaminate, sodium nitrite and the o-toluidide of 2 : 3-oxynaphthoic acid and the colour developed by acidification.  The azo dyes are also formed by passing a current of nitrous gases into the solution of the nitrosohydroxylaminate and naphtholate.