baber/WOPTO huggingface dataset:
Patent GB-344181-A (GB)
Title: Improvements in high frequency electric transformers for generating high voltages
IPC: H01F19/00
Filed: 1930-02-11
Abstract: 344,181. Transformers. GOODLET, B. L., Ambleside, Spennithorne, Urmston, Manchester, and ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Bush House, Aldwych, London. Feb. 11, 1930, No. 4596. [Class 38 (ii).] A high - frequency transformer comprises a low tension winding 2 wound on hollow conical former 3 disposed within a cylindrical former 10 carrying the high tension winding 9 which is connected at its upper end to a top plate 20 forming the high tension terminal and having a rounded edge 33 for stress distribution. The two formers are supported on a hollow base 5 forming the lower part of an oil tank, the side walls of which are formed by a micanite or other insulating cylinder 12. The upper end of the low tension winding 2 is connected to the base 5, whilst the lower ends of both windings and also intermediate points such as 19 on the low tension winding are connected to terminals 14, 15, 16 mounted on the base 5. Stress distributing rings 25, 26 are provided at the upper ends of the windings, and in order to increase the capacity to earth of the high voltage winding, a condenser comprising electrodes 28, 29 connected respectively to the high tension terminal and to earth is mounted above the transformer on a strut 30.
Patent GB-125691-A (GB)
Title: Improvements in and relating to Fuzes for Projectiles.
Inventor: CLEATHERO THOMAS
IPC: F42C9/06
Filed: 1918-03-15
Abstract: 125,691. Cleathero, T., Lumb, C. F., and Spurr, F. March 15, 1918. Lift valves; thermally-actuated valves.-Relates to time fuses for projectiles of the kind in which the timing is effected by means of a. piston which expels a liquid from a cylinder through a valve adjusted according to the time desired. According to the invention, a centrifugally-operated valve is employed. In the form shown, the piston 3 is released by centrifugal bolts 7 when the projectile is discharged, and, under the action of centrifugal force, drives liquid out of the cylinder 2 into a vacant space 20 through a lift valve 10, which opens by centrifugal force. The load of the valve spring and the lift of the valve are adjusted according to the time desired by screwing a socket 13 in or out by means of a rotatable plug 18 provided with pins 16 fitting into holes in the flange 14 of the socket 13. To allow for variations of temperature, expansion disks such as 3<b> are arranged in various ways on the piston and in the socket 13.
Patent GB-1118853-A (GB)
Title: Improvements in vehicle suspension systems
IPC: B60K5/12
Filed: 1966-02-02
Abstract: 1,118,853. Vibration damper arrangements; mounting engines and gear casings. PAULSTRA. 2 Feb., 1966 [2 Feb., 1965], No. 4668/66. Headings B7D, B7H. In order to absorb high frequency vibrations of a vehicle mounted on pneumatic tyres a telescopic hydraulic or other vibration damper 6, mounted in parallel to a spring 5 between the frame 1 and unsprung mass 2 of the vehicle, is connected at its upper end to a heavy mass 8, such as the vehicle engine gear-box unit 1, which is itself resiliently supported at 9 on the vehicle frame 1. The elastomeric mountings 9 are gradual abutment supports so that they are flexible for small deflections and stiffer for large deflections. In operation low frequency wheel vibrations are absorbed by the damper 6 conventionally and high frequency vibrations are transmitted to the mass 8 which vibrates with a smaller amplitude which is absorbed by the mountings 9. The dampers 6 also damp engine vibrations. The heavy mass may comrpise a sprung differential unit.
Patent GB-292203-A (GB)
Title: Improvements in diaphragm pumps
IPC: F04B43/00
Filed: 1927-02-19
Abstract: 292,203. Stokes, R. O. Feb. 19, 1927. Diaphragm pumps.-In a pump piston of the kind comprising two diaphragms enclosing liquid, one diaphragm 8 is attached at its inner edge to a plate 10 movable with respect to the piston rod 3 against a spring 13, so that the space enclosed between the diaphragms may vary. The outer edges of both diaphragms 5, 8 are fixed between rings 15, 16, 17. Liquid is admitted to the space between the diaphragms by a passage 21 provided with an inlet valve 23 and a safety valve 24. An air relief tap 25 is mounted as shown. In a modified construction the spring 13 is mounted between a plate attached to the ring 6 and a post on the movable plate 10. Alternatively, the inner plate 4 may be arranged to yield.
Patent GB-947545-A (GB)
Title: Arrangement for the simultaneous operation of two induction heating devices
IPC: H05B6/02
Filed: 1962-02-07
Abstract: 947,545. Induction heating coils. BROWN, BOVERI & CO. Ltd. Feb. 7, 1962 [Feb. 9, 1961], No. 4769/62. Heading H5H. [Also in Division H2] The simultaneous operation of the two induction heating devices each having their induction coils connected to two of the three conductors R, S, T, of a three-phase system, particularly an arrangement capable of simultaneously heating two billets each of which is being treated in a respective one of two cable sheath presses, is controlled by a circuit where the tapping points 6, 7 of each uniformly wound coil lying between the system conductors can be connected together by means of a switch 3, the position of the tapping points being so selected that a part of the induction coil 1b, 2b, lying between said tapping points and one of the system conductors S, T receives an undiminished, preferably constant power, and the other parts 1a, 2a a diminished power or no power at all. In one form, Fig. 1, switches 4, 5 are arranged to be opened at the same time as switch 3 is closed, and impedances 1c, 2c can be switched in, thus short-circuiting parts of coils 1b 2b to reduce the sudden temperature rise along the billets. Alternatively, it can be arranged that only switch 3 is closed, conductors la, 2a is parallel form one phase conductor, and 1b, 2b complete a star-connected system. Reactances may be connected in parallel with the induction coils to obtain a symmetrical load on the three-phase system so that each inductive device has a power factor such that cos #= #3/2, giving a total power factor of cos 4=1.
Patent GB-729360-A (GB)
Title: Improvements in and relating to the manufacture of heel top-pieces for shoes
Inventor: WARD FRANCIS DONALD
IPC: A43B21/06
Filed: 1953-02-20
Abstract: 729,360. Boots &c. protectors. WARD, Ltd., F. D. Nov. 11, 1953 [Feb. 20, 1953], No. 4792/53. Class 17 (3). Heel top-pieces of the type having a leather or equivalent blank with a metal plate which is formed with a depending flange arranged to embrace the rounded back or the back and sides secured to its non- tread face, are produced in readily separable pairs. Pairs of leather or like blanks 1 connected at 2 are blanked out in a cutting press and are placed over a pair of metal plates 3, having fixing formations of the type described in Specification 620,742, and are driven home into the plates by a press. The inserted blank is then compressed in a compressing machine which may at the same time make a cut 10 partially separating the two top-pieces. Alternatively, the cut may be made in a separate operation after the compression. The compressing machine may make markings or indentations 11, 12, as guides for inserting nails or other purposes.
Patent GB-1133425-A (GB)
Title: Improvements in or relating to transistor amplifiers
Inventor: ROGERS ERNEST WILLIAM
IPC: H03F3/26
Filed: 1967-02-01
Abstract: 1,133,425. Transistor push-pull amplifiers. REDIFON Ltd. 6 Oct., 1967 [1 Feb., 1967], No. 4837/67. Heading H3T. [Also in Division H1] In a multi-stage amplifier having a class A push-pull stage including transistors 17, 18 and driving a class B push-pull stage including transistors 34, 35, direct and inductive coupling are provided between the stages, two windings 29, 32 of an inductive device 30 being connected in a sense such that power for driving a transistor of the second stage is provided by the transistor of the first stage to which it is directly connected and also by the other transistor of the first stage by the inductive device 30. Negative feedback is provided by resistors 36 and 37 and the emitter resistors 31, 33 and 36, 37 may each be replaced by single resistors. Resistors 23 and 24 provide constant loading of the input transformer. The amplifier may be used for radio or audio frequencies, 200 kc./s.- 40 Mc/s., 30 c/s.-30,000 c/s. and the NPN transistors can be replaced by PNP types. Transformer construction.-For radio frequencies the inductive device 30 may be of shell type provided with a manganese-zinc ferrite core and having the two windings 29, 32 each consisting of one turn of enamel covered wire wound with the turns in intimate contact in the same direction to provide close coupling. Alternatively, for audio frequencies, a laminated nickel iron alloy E-type core having a bifilar winding may be used to provide tight coupling between the windings 29, 32.
Patent GB-384260-A (GB)
Title: Process for the manufacture of substances similar in action to sexual hormones
Filed: 1931-02-16
Abstract: Substances similar in action to sexual hormones are prepared from oils or fats of animal or vegetable origin by extraction with a solvent which does not dissolve the oil or fat.  The oil such as olive oil or cod-liver oil may be extracted with 96 per cent alcohol or with 50 per cent aqueous alcohol.  The extracts so obtained may be saponified and the active substance extracted from the saponified mixture, either directly or after neutralization. According to an example sesame oil is extracted with alcohol, the alcohol evaporated and the residual extract dissolved in alcoholic caustic potash and saponified by prolonged boiling.  The alcohol is then evaporated off, the residue mixed with an inert material such as sand, extracted with acetone in a ball mill and the acetone evaporated leaving an active residue.  Alternatively, the saponification mixture may be taken up in water, acidified to pH 8,5, extracted with ether, and the ether evaporated.
Patent GB-503045-A (GB)
Title: Improvements in or relating to dart boards
IPC: F41J3/00
Filed: 1938-02-17
Abstract: 503,045. Dart boards. ELLAM, J. A. Feb. 17, 1038, No. 4901. [Class 132 (iii)] For use with a dart board, wherein the board may be rotated relatively to the numerals, a supporting device comprises two coaxial coacting members, one of which lies behind the back of the board and is rotatable relativlely to the second which is fixed to a support. The dart board 16 is attached by screws to a plate 18 to which is riveted a cup-shaped member 10 engaging round another cup-shaped member 12 riveted to a plate 28 and a disc 30, all being centred on a stud 14. The plate 28 tapers downwards and removably engages the inside of a correspondingly shaped flanged wall plate 20. The disc 30 carries sockets holding wires 36 radiating to the periphery of the board, whence they bend to the front to form the numerals which remain stationary. The board 16 and the member 10 can rotate and means comprising a plurality of holes 38 in the flange 11 of the member 10 and a spring pressed ball 42 in an aperture 40 of the member 12 can hold the board temporarily against rotation. The holding means may alternatively be of ratchet type. Specification 481,943 is referred to.
Patent GB-123619-A (GB)
Title: Improvements in or relating to Blocks of Writing-paper or the like.
Inventor: MOUNTJOY RICHARD GEORGE
IPC: B42D5/00
Filed: 1918-03-20
Abstract: 123,619. Mountjoy, R. G. March 20, 1918. Pocket-books.-A block B of writing paper &c. is provided with a cardboard or other rigid backing A having an extension X by means of which it may be removably attached to a wallet or to the cover E of a pocket-book. One method cf attachment is shown in Fig. 1, pins D on a metal strip C passing through holes in the extension X, and a rod G being passed through eyelets in the pins.
Patent GB-817978-A (GB)
Title: Centrifugal separator particularly for lubrication oil of internal combustion engines
IPC: F16N39/06
Filed: 1957-02-13
Abstract: 817,978. Centrifugal separators. FIAT S. p. A. Feb. 13, 1957 [Oct. 31, 1956], No. 4935/57. Class 23 An oil cleaner mounted on an extension 2b of an I.C. engine crankshaft 2 has internal diaphragms 81, 82 arranged so that oil from inlets 39d flows around the edge of the diaphragm 82, passes between the diaphragms, and is discharged through outlet 41 whilst the impurities are deposited in an annular cavity 4<SP>1</SP>. Vanes 42a are provided in the separator on the inlet side of the diaphragm. The oil is fed from a gear pump housing 38a and passes through ducts 39c, 40 to the inlets.
Patent GB-554061-A (GB)
Title: Improvements in or relating to rectifiers
IPC: H02M7/06
Filed: 1942-04-15
Abstract: 554,061. Electric transformers. AKT.-GES. BROWN, BOVERI & CIE. April 15, 1942, No. 4971. Convention date, April 28, 1941. [Class 38 (ii)] In transformers for feeding multi - anode rectifiers, the short-circuit currents caused by arc-backs are reduced without increasing the impedance of the transformer for normal operation, by arranging each winding a which feeds the anodes in, say, four groups and associating it on the same limb with two other windings b, c arranged also in four groups. In the form shown the groups b are arranged in series and carry the line current and the groups c are arranged in parallel. In normal operation, there is no current in the winding c but if an arc-back occurs, current does flow and builds up a strong leakage field which checks the rise of the short-circuit current. In a modification, Fig. 3 (not shown), for three phase transformers, each winding b on one of the limbs is connected in series with parallel-connected groups on another limb. In another modification for three phase transformers the windings with the parallel-connected groups are connected in delta over the three transformer limbs.
Patent GB-659198-A (GB)
Title: Improvements relating to card indexes
IPC: B42F17/32
Filed: 1949-02-23
Abstract: 659,198. Index cards. RUEGG-NAEGELI & CIE, SOC. ANON. Feb. 23, 1949, No. 4994. Convention date, March 1, 1948. [Classes 16 and 146 (i)] An index card having an index strip 3 along its upper edge has part of the card parallel to and lower than the index strip outwardly arched to form a smoothly curving bulge 5 of the same order of depth as the index strip so as to space the tops of the cards when in a holder. The cards 1 shown have a folded back leaf 2 also provided with a bulge 6 but single cards may be used in pairs with bulges facing in opposite directions. A narrow crease 4 separates the index strip from the bulge 5, and the folded top edge may have slots through which coloured signals 11 may be placed. The holder, of fibreboard or the like, comprises a narrow base 7 with front 8 and back 9 inclining outwardly when in use but movable inwards for storing in a drawer.
Patent GB-1452791-A (GB)
Title: Analog computer circuits
IPC: G06G7/20
Filed: 1974-02-04
Abstract: 1452791 Electric analogue calculating BAILEY METER CO 4 Feb 1974 [2 Feb 1973] 05109/74 Heading G4G An electric analogue calculating circuit for generating a function of the form XY/Z comprises an oscillating circuit producing a signal e comp at the output of amplifier 85 at a frequencyproportional to Y/Z, this output being fed to a circuit 90 which gives a series of pulses es oscillating between two valves, the proportion of time at which the output is at one level being determined by Y/Z and during this time switch 100 connects the other variable X to an integrating circuit 110 which gives an output W proportional to XY/Z. The oscillating circuit, which in this case generates a rectangular wave, consists of converters 10, 20 providing negative and positive voltages representing Y and Z. The positive or negative Y voltage, depending on switches 40, 50 is integrated in integrator 77, 78. The Z voltages are similarly connected to a linear amplifier circuit 81, 82. The outputs of these two paths are compared by amplifier 85 and when the output thereof reaches pre-set upper and lower limits a feedback path 86 changes the states or switches 40, 50, 60, 70 thus resulting in an oscillating squarewave output from amplifier 85 with a frequency proportional to Y/Z. This output is taken to circuit 90 which includes a linear voltage divider 91, 92 and a non-linear voltage divider 93, 94, the latter thus being frequency dependent. The voltages e 1 , e 2  from these dividers are compared by amplifier 96 whose output e s  charges between two levels depending onwhich of e 1  and e 2  is the greater and the proportion of time at each level is dependent on the frequency of the input to circuit 90 and thus on Y/Z. A more detailed circuit operating on the same basic principles is illustrated in Figs. 3a and 3b (not shown) which includes such refinements or transistor switching circuits and buffer amplifiers.
Patent GB-881470-A (GB)
Title: Improvements relating to amplifier circuits
Inventor: MANSFORD HUGH LYON
IPC: H03F1/20
Filed: 1957-02-15
Abstract: 881,470. Valve amplifying circuits. ELECTRIC & MUSICAL INDUSTRIES Ltd. Feb. 17, 1958 [Feb. 15, 1957], No. 5165/57. Class 40(6). [Also in Group XL(b)] In a distributed amplifier in which one stage is connected to the next via a D.C. isolating condenser, the effective value of the grid leak resistor of the second stage is made greater than the actual value. An artificial line, comprising inductances 7-13 and shunt capacities 14-19 couples the anodes of a first stage 1, 2 to the grids of a second 3, 4. The line is terminated by resistor 20 at its input end and by resistor 32, in series with condenser 33, at the output end, and is divided for D.C. blocking purposes by condenser 31 in series with which is resistor 30. An additional shunt element comprising inductance 23 and resistor 24 forms with resistor 32 and condenser 33 a constant resistance network (R = #L/C) so that at low frequencies, where   the reactance of condenser 33 is appreciable but for which the position of the termination of the line is unimportant, the proper terminating impedance is maintained. Condenser 33 is shunted by the grid leak 34, the effective resistance of which at low frequencies is made very high by returning it to the cathode of a cathode follower 6, the grid of which is fed via resistor 41 and blocking condenser 36 from a potentiometer comprising resistor 26 and condenser 27 in shunt with the line. In this way condenser 31 can be restricted to a value sufficiently small to avoid degrading the. high frequency performance of the line. Resistor 30 renders the grid circuit loss of the valves 3, 4 equal to the voltage loss through the cathode follower 6, the line impedance being corrected by shunt resistor 28 and condenser 29. The cathode follower 6 derives its supply via resistor 21 which is decoupled by condensers 22, 25: the effect upon its output of signal voltage appearing across resistor 21 at low frequencies is balanced by an out of phase voltage applied to its grid by means of a phase-reversing valve 5, the grid of which is fed from resistor 21 via condenser 35. The Specification also describes a modification (Fig. 2, not shown) in which a transformer is inserted in the line, between condenser 31 and inductance 11, in order to reverse the phase of the signal applied to the valves 3, 4.
Patent GB-1520218-A (GB)
Title: Liquid dispensing apparatus
IPC: G01F11/02
Filed: 1977-02-08
Abstract: 1520218 Reciprocating pumps W J ROACH 8 Feb 1977 [12 Feb 1976] 05178/77 Heading F1A A hand-actuated pump for dispensing measured quantities of liquid from a reservoir 1 comprises a cylinder 19 on a housing 4 detachably secured to reservoir 1, and a piston reciprocable in the cylinder and carrying a skirt 37 with a coarse stroke-setting abutment 46 engageable with a fixed abutment 43 on the cylinder projecting through a skirt slot 38, abutment 46 being releasably clamped by screw 48 and located by serration 41 corresponding with a scale 40 traversed by pointer 54. A fine stroke-setting abutment comprises a sleeve 57 rotatably mounted on skirt 37 and having steps 61 alignable with fixed abutment 43, a pointer 36 on piston-operating handle 34 registering with fine scale 62 and engaging detents on sleeve 57. Calibration is effected by a screw in abutment aperture 66. The inlet and outlet valves comprise ceramic balls in glass tubes. Delivery nozzle 29 has a removable end cap. Component materials and the method of assembly are described.
Patent GB-608321-A (GB)
Title: Improvements relating to axes
IPC: B26B23/00
Filed: 1946-02-20
Abstract: 608,321. Handle guards. HUNT & SONS, THE BRADES, Ltd., W. (Robinson, A.). Feb. 20, 1946, No. 5242. [Class 61 (i)] A guard for an axe handle comprises a blank a stamped from a piece of semicircular sheet metal and wrapped around the fore part of the handle b, immediately below the head c, the straight edge a<SP>1</SP> of the guard being adjacent the head. A rivet d or screws &c. may be used to fix the guard in place.
Patent GB-164027-A (GB)
Title: Improvements in reduction gear
IPC: F16H1/32
Filed: 1919-03-04
Abstract: 164,027. Avamore Engineering Co., Ltd., and Beckwith, N. G. March 4, 1919. Epicyclic gearing; friction gearing. - Relates to reduction gearing for connecting shafts in alinement. A toothed or friction wheel f loose on an eccentric e on the driving shaft b engages an annular track d in a fixed casing a, and is connected by a flexible coupling g, h to the driven shaft c. The track d may be held in place by screws l.
Patent GB-1041651-A (GB)
Title: Process for the manufacture of polyethylene terephthalate
IPC: C08G63/87
Filed: 1964-02-07
Abstract: Polyethylene terephthalate is made by polycondensing bis-(beta-hydroxyethyl)terephthalate in the presence of stannous oxalate as a catalyst.  The bis-(beta-hydroxyethyl)terephthalate may be made by reacting dimethyl terephthalate with ethylene glycol in the presence of zinc acetate, manganous acetate, calcium acetate or cobaltous acetate or a mixture of the last two compounds.  A phosphorus compound, e.g. phosphorous acid, an ester of phosphorous acid (such as triphenyl phosphite) or an ester of phosphoric acid (e.g. triphenyl phosphate) may be added at the commencement of the polycondensation.
Patent GB-1195183-A (GB)
Title: Apparatus for Folding Sheet-Material.
IPC: B65H45/30
Filed: 1969-01-31
Abstract: 1,195,183. Folding sheets. KALLE A.G. 31 Jan., 1969 [2 Feb., 1968], No. 5342/69. Heading B8R. Paper sheets are formed, prior to folding, with both transverse and longitudinal grooves, by passing between rollers 4, 5, Figs. 1 and 2. Each roller has a grooving bar 8, 9 respectively mating with a grooving recess 17, 16 in the other roller, to form the lateral grooves to be alternately oppositely directed. The roller 4 also has three semi-circumferential bars 10, 11, 12 mating with recesses 23, 24, 22 on the roller 5, and three similar recesses 20, 21, 19 mating with bars 13, 14, 15 on the roller 5, to produce alternately oppositely directed longitudinal grooves. The sheet 25 is advanced by flanges 29, 30 at one end of the rollers, which are rotated by a handle 6 and gear-wheels 7. The distances of the ends of the circumferential bars from the corresponding recesses increases from the drive end of the rollers, as shown at 31, 32, 33, to avoid simultaneous priming of the paper and tearing. The sheets are delivered into a chamber 36, where impingement against the wall 39 produces transverse zigzag folding. Longitudinal zigzag folding is done manually after removal from the chamber, along the longitudinal grooves.