baber/WOPTO huggingface dataset:
Patent GB-763443-A (GB)
Title: Improvements in or relating to transistor circuits for amplifying electrical signals
IPC: H03F1/26
Filed: 1953-06-22
Abstract: 763,443. Semi-conductor amplifying circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. June 22, 1953 [June 25, 1952], No. 17221/53. Class 40(6) A circuit for amplifying an intelligence signal shown in the Figure as derived from a source Vi comprises a transistor 1 to the input circuit of which the intelligence signal is applied together with an auxiliary oscillation Vo, having a higher frequency fo than the band of frequencies indicated generally as fi occupied by the intelligence signal Vi, so that an output signal of a suitable combination frequency, e.g. (fo + fi) is developed across the resonant circuit 9 tuned to the selected combination frequency. By suitable demodulation of the signal developed across the resonant circuit 9, an amplified version of the input signal Vi may be derived, the object of the invention being to derive such an amplified signal having a low signal-to-noise ratio. This is achieved by suitably biasing the transistor 1 and by selecting appropriate values for the elements in the output circuit of the transistor. It is stated that the total impedance in the output circuit must be high at the combination frequency (fo + fi); this is achieved by the tuning of the resonant circuit 9 to that frequency. Further a low impedance is desired at the frequency fo of the auxiliary oscillation Vo, while a high impedance is desired at the frequency of the intelligence signal fi, a suitably designed resistance capacitance circuit 10 being provided for this latter purpose. A comparatively low resistance 25 may further be introduced into the output circuit of the transistor to provide negative feed-back at the frequency fo and maintains the level of noise generated at the collector contact at that frequency constant. A modified form of circuit is illustrated in Fig. 4 wherein the effective base resistance is reduced to zero by means of a current negative feed-back provided by the phasereversing transformer 12 and resistor 13. It is stated that assuming the transformer 12 has a one-to-one ratio the resistor 13 should have a valve equal to the natural value of the base impedance. Fig 5 shows a further modification wherein the local oscillation of frequency fo is generated in the circuit itself by means of the tuned circuit 15 connected in the base circuit of the transistor 1. The diode 21 and by-pass resistor 23 are provided to limit the amplitude of the oscillation developed across the circuit 15. In a further modification Fig. 6 (not shown) the circuit of Fig. 5 is modified by connecting a tapped-off portion only of the inductor of the circuit 15 in the emitter-base circuit of the transistor.
Patent GB-182313-A (GB)
Title: Improvements in or relating to cement on concrete railway ties or sleepers
IPC: E01B3/42
Filed: 1921-06-23
Abstract: 182,313. Crane, A. L. June 23, 1921, Sleepers, composite; chair plates.-Chair-plates 7 carrying the rails are supported by fibre blocks 3 counter-sunk in cement or concrete sleepers, the bottom of the recesses in the sleepers being formed by a metal plate 4. The sleepers are reinforced by rods 12, 13; the ends of the rods 12 being upturned below the running rails and the ends of the rods 13 adjacent to the ends of the plate 4. The upper surface of the chairplates are stepped at points 7<a>, 7b to receive the clamps 11 and the outer edges of the rail flanges respectively. The parts are secured together by bolts 10 passing through diagonally arranged plates 9 let into recesses in the base of the sleeper. For use at curves, the sleepers or the chair-plates may have inclined upper surfaces.
Patent GB-1212417-A (GB)
Title: Production of quinones
Inventor: MILNER DAVID JOHN
IPC: C25B3/23
Filed: 1968-04-10
Abstract: 1,212,417. Quinones. IMPERIAL CHEMICAL INDUSTRIES Ltd. 2 April, 1969 [10 April, 1968], No. 17273/68. Heading C2C. Quinones are prepared by oxidizing an aromatic amine in a substantially waterimmiscible solvent, e.g. a hydrocarbon, chlorinated hydrocarbon or ether other than tetrahydrofuran, with an acidic aqueous solution of a pentavalent vanadium compound e.g. an alkali metal or ammonium meta vanadate in aqueous sulphuric acid. The spent vanadium reagent may be regenerated electrolytically. Examples disclose the preparation of benzoquinone from aniline and N-methyl aniline, of 2-methyl benzoquinone from o and m-toluidine and of naphthoquinone from 1-naphthylamine.
Patent GB-593353-A (GB)
Title: Improvements in television scanning discs
IPC: H04N3/04
Filed: 1943-10-22
Abstract: 593,353. Television. GENERAL ELECTRIC CO., Ltd., and ESPLEY; D. C. Oct. 22, 1943, No. 17418. [Class 40 (iii)] In picture scanning systems of the type in which the picture is scanned in a succession of elements defined by scanning apertures carried by a rotating scanning member, each scanning aperture is associated with its own lens which is adapted to rotate therewith and to fill the aperture with an enlarged real image of an element of an enlarged real image of said picture. Alternatively, a real image of a reduced real image of the scanning apertures may be formed on the picture to be scanned. The scanning system permits the effective area of the apertures to be increased without increasing the speed of rotation of the disc. A light source 3 and lens system 4, 5 forms an image P, Q in plane B of a film 1 moving across a gate 2. An enlarged image of an elementary area E of image P, Q is focused by lens 8 on to an aperture 6 in the scanning disc and thence via lens 10 to a photo-electric device 9. The lenses 8 and apertures 6 may be carried by separate discs which are keyed so as to rotate together or they may be both carried by the same disc. An example of the latter construction is shown in Fig. 3 in which a section of part of a scanning disc 16 including a window 17 has a transparent plastic moulded in situ, one face 13 of which is curved to provide the refracting lens surface and the other face 14 being plane and covered by an opaque layer 15 perforated by a hole which provides the scanning aperture. The face 14 may also be curved to form the lens 10 and the complete moulding may be formed -into the shape of a rivet head so as to fix the moulding in the window. The position of the source 3 and photo-electric device 9 may be interchanged.
Patent GB-292175-A (GB)
IPC: B02C23/00
Filed: 1928-06-16
Abstract: 292,175. Wood, W. R. June 17, 1927, [Convention date]. Density separators.-In a " closed " type of pulverizing system comprising, in general, an air lift pulverizer, a separator, and pipes leading from the pulverizer to the separator and from the separator to the pulverizer, the duct D that conveys the air returning from the separator B to the mill A comprises means E whereby the dust contained in this air is separated temporarily, and that during this separation the required rejection or withdrawal of air occurs. Coal is fed into the mill A through the pipe 2 and is discharged by the blower 3 through the duct C to the cyclone B, where it is separated from the air or gas and discharged through the duct 5. The air or gas laden with dust is conveyed from the cyclone B through a duct 9 to a separator E comprising a drum 6 and axially disposed tube 7. The inlet duct 9 and the outlet duct 10 to the mill are arranged tangentially in the drum 6 of the separator so that the dust in the air or gas is thrown towards the circumference by centrifugal action and is conveyed by the pipe 10 back to the mill, any material accumulating on the sides of the drum may be discharged through the duct 11. Hot air or hot gas from a furnace flue enters the mill at the duct 4 and the equivalent amount of air or gas is discharged through the tube 7 in the separator substantially free from dust.
Patent GB-553980-A (GB)
Title: Improvements in or relating to snap-action electric switches
IPC: F01D5/22
Filed: 1941-12-10
Abstract: 553,980. Snap-action switches. BRITISH MECHANICAL PRODUCTIONS, Ltd., and DEAKIN, S. T. Dec. 10, 1941, No. 17517/40. [Class 38 (v)] The movable contact member of a snap-action switch is made of springy metal and has a head portion 10 and two springy leg portions 11. In the form shown the member has side portions 14 constituting the actual contacts and moves rectilinearly to bring these into engagement with contacts 17 or 18. The movement is brought about by a dolly which by means of teeth drives a slide, portions 31 of which receive links 13 passing through gaps 30 and the other ends of which engage the legs 11. The links 13 thus pass through a position of maximum strain and a snap-action is effected.
Patent GB-612970-A (GB)
Title: Improvements in or connected with refuse collecting vehicles
IPC: B65F3/20
Filed: 1946-06-12
Abstract: 612,970. Loading and unloading refusecollecting vehicles. EAGLE ENGINEERING CO., Ltd., and PALMER, R. G. June 12, 1946, No. 17542. [Class 78 (iv)] In a refuse collecting vehicle of the kind containing a compression plate actuated by a pair of rams, each ram 6 is located in a tunnel housing 7 connected to and forming part of the body. Each ram 6 is connected to the compression plate 1 by means of a rod 5, links 4 and lugged brackets 3, which latter are fastened to the rear of said plate and carry anti-friction rollers 8 adapted to traverse parallel guide tracks 9. The rams are arranged so that the compression stroke utilises the full area of the ram, and the return stroke uses a reduced area corresponding to the difference between the areas of the ram and the rod.
Patent GB-333335-A (GB)
Title: Process of converting high boiling hydrocarbons into low boiling hydrocarbons
IPC: C10G9/36
Filed: 1929-06-07
Abstract: 333,335. Elkington, H. D., (Naamlooze Vennootschap de Bataafsche Petroleum Maatschappij). June 7. 1929. Hydrocarbons, cracking.-Oils are cracked by distilling them and mixing with the vapours at a plurality of independent points fresh charges of combustion gases formed from a source independent of the oils being treated, so that the cracking is completed in a stepwise manner the mixture being passed after the addition of each charge of combustion gases into an enlarged zone. Oil vapours introduced through an inlet 36 are cracked by contact with hot combustion gases formed by introducing air and fuel through an intake 19 and burning them in a burner 17. The products are led into an expansion chamber 1, where solid particles separate out, and are again cracked by contact with hot gases formed in a similar burner 21, the products being led to a further expansion chamber 2. Combustion gases from further burners may be introduced and the final products pass to a chamber 27 to which crude, oil is introduced through a pipe 31, the vaporized oil being passed through a pipe 32 to the inlet 36.
Patent GB-259522-A (GB)
Title: Improvements in or relating to transition couplings for railway or like vehicles
IPC: B61G5/04
Filed: 1926-07-14
Abstract: 259,522. Trimming, G. A. R. July 14 1926. Addition to 230,409. Couplings, automatic, convertible to non-automatic.- In a transition coupling of the kind described in the parent Specification, a recess or slot 1 is made in the fixed jaw 5 of an automatic coupling of the rigid jaw type to receive a part 5 of a transition device 2 which has a general contour of the shape of the automatic coupling and is adapted to make a coupling engagement with the automatic coupler by a lateral movement which pushes the lock 6 into the coupling head and permits a part 4 of the device 2 to enter the slot 1, whereupon the lock 6 moves out of the coupling head and locks the transition device 2 in the coupler.
Patent GB-573243-A (GB)
Title: An improved jointing material
IPC: C08L95/00
Filed: 1943-10-27
Abstract: A composition for forming damp-proof joints in buildings consists of vulcanized oil rubber substitute with or without an addition of mineral rubber, soft pitch or bitumen, mixed with fillers such as whiting, china clay, barytes, carbon-black, zinc oxide, lithopone, and a small proportion of an anti-oxidant and a waxy or oily lubricant.  Suitable proportions are 37 per cent of vulcanized oils and bitumens, 60 per cent whiting or carbon black, 1 per cent stearic acid or paraffin wax, 1 per cent mineral oil, and 1 per cent anti-oxidant such as "Nonox S" (Registered Trade Mark).  The composition is suitable for use in buildings as described in Specification 569,503, [Group X].
Patent GB-1509032-A (GB)
Title: Digital frequency meter
IPC: G01R23/02
Filed: 1976-04-26
Abstract: 1509032 Digital frequency meter CONTROLOGY TECHNIQUES Ltd 26 April 1976 [29 April 1975] 17713/75 Heading H3H In a digital meter a first means 12 derives a stabilized D.C. voltage from the signal to be measured, the monitoring means including a digital display being powered by the D.C. voltage. In the embodiment an incoming frequency signal is passed to means 12 comprising a rectifier, smoothing means and regulating means, and also to the monitoring circuit which comprises a signal shaper 18, frequency multiplier 20 and a counter 22 gated by clock pulses from a crystal oscillator 26 and divider 27. The counter drives a digital display and the monitoring means is energized by a D.C. voltage from means 12.
Patent GB-588656-A (GB)
Title: Improvements in and relating to electric valve control apparatus
IPC: B23K11/24
Filed: 1942-12-14
Abstract: 588,656. Control systems for resistance welding &c. BRITISH THOMSONHOUSTON CO., Ltd. Dec. 14, 1942, No. 17730. Convention date, Dec. 18, 1941. [Class 38 (iv)] Current control; automatic.-The current supplied, throughout a predetermined number of cycles, from an A.C. source through valve apparatus to a load, such as a welding circuit, is maintained constant at a desired value by an amplifier operating in conjunction with a regulating diode, or the equivalent, comprising a photo-electric cell and a filamentary light source. The cathode of the diode or the filament of the light source is energized in accordance with the load current and fluctuations of the diode or photo-electric cell current are utilized, after amplification, to control the conductivity of the valve apparatus. The load current in the first few cycles may be arranged to commence somewhat above or below the desired constant value. Back-to-back ignitrons 2, 3 are ignited by grid-controlled valves 14. The grid voltage of each of these valves is compounded of a steady negative bias from condenser 20, and an opposing peaked impulse voltage from transformer 23, insufficient to ignite the valves, upon which is superposed by transformer 48 an impulse from a timing circuit 30 through back-to-back valves 45, 46. These valves are rendered conducting periodically for a number of cycles determined by the setting of tappings on resistances 34, 36 when a switch 115 is closed ; operation of this switch puts a periodic voltage in synchronism with the supply circuit voltage on the grid of a valve 38 to. cause synchronous discharge of a condenser 35, whereupon valve 45 is ignited once each impulse, valve 46 trailing valve 45,and the transformer 48 periodically energized to cause current in the load circuit for the predetermined period. This current energizes a transformer 101, the secondary of which heats the filament 89 of a valve 86 in accordance with the load current ; deviation from a value predetermined by the setting of a resistance 59, or resistance 108, will vary the current in a resistance 96 to change the grid potential of an amplifier 73, the anode resistance 79 of which controls the current through valves 65, 66, loading an impedance 57 to change the setting of the phase-shifting circuit in a sense to correct the load current by a change in the phase of the peaks from transformer 23. To maintain the system in readiness during off load periods or set it to start at a current value different from that to be maintained, an auxiliary constant current passes through a resistance 112 and an adjustable part of this resistance is connected to the filament 89 by back contacts of a load responsive retay 103. Any two or more of the adjustable resistances 59, 112, 108 may be ganged. A modified control of the grid voltage of valve 73 in response to load current may be obtained from a resistance carrying the current through a photo-electric cell exposed to a lamp energized in proportion to load current.
Patent GB-1351819-A (GB)
Title: Packaging
IPC: C09D123/02
Filed: 1971-05-28
Abstract: 1351819 Adhesive compositions HENKEL & CIE GmbH 28 May 1971 [27 June 1970] 17730/71 Heading C3P [Also in Divisions B1-B2] Adhesive compositions for preventing sliding of packages in wrappings of paper, cardboard or pasteboard, comprise aqueous dispersions containing 3 to 60 per cent by weight of the composition of a paraffin of melting point of 40 to 100‹C. and/or polymer of a C 2 -C 8  alkene. The polyalkene may be polyethylene or polypropylene. The compositions may also comprise a wax. The dispersion may be prepared with the aid of fatty alcohol polyglycol ethers and sulphates thereof, and may also contain polymers, modified natural resins and natural and synthetic rubbers, e.g. polyvinyl ethers, polyvinyl esters, polyacrylates and hydrogenated rosin esters of glycerol; watersoluble macromolecular substances, e.g. xanthane gum, cellulose ethers. polyacrylic acid salts, polyvinyl pyrrolidone and polyvinyl alcohol; inorganic thickeners, e.g. bentonite and silicic acid; and preservatives, e.g. formaldehyde, pentachlorophenolates and p-hydroxybenzoic acid. Examples describe aqueous dispersions of (1) polyethylene containing formaldehyde, together with (5) paraffin, (7) polyvinyl isobutyl ether, (11) ammonium polyacrylate, (12) xanthane gum and (13) xanthane gum and paraffin; and of paraffin and formaldehyde together with (2) polyvinyl isobutyl ether, (3) polyvinyl acetate, (14) polyvinyl acetate and xanthane gum hydroxypropyl ether and (15) polyvinyl isobutyl ether and xanthane gum.
Patent GB-423651-A (GB)
Title: Apparatus for cutting food particularly meat
IPC: B02C18/30
Filed: 1933-12-02
Abstract: 423,651. Mincing- machines. SCHOLTES, J., 244, M³nsterstrasse, D³sseldorf, Germany. Dec. 2, 1933, No. 17755/34. Divided out.of and addition to 420,725. [Class 28 (ii)] In a mincing- machine, the material, after a preliminary cutting, is passed between a rotary axial cutter 4 and a stationary sleeve cutter 3 having knives 11, and is then constrained, by a constriction 5 and deep bays in the flutings of the cutter 4, to pass in undulatory manner to a stationary removable " knife basket " 6 which effects the final comminution. The " knife basket " consists of knives 10 arranged longitudinally or substantially longitudinally of the machine, and tangentially to the cutter 4. The knives 10 are spaced by conical disc cutters or hoops. The spacing of the knives in the basket 6 determines the fineness of the mincing, and baskets having different spacings may be provided, so that one may be selected and attached to the machine.
Patent GB-406181-A (GB)
Title: Improvements in and relating to knitting machines for making tubular products, in particular sleeves for cord or tubular bodies, tubular yarns for textiles and the like and for knitted materials made from tubular yarns
IPC: H05B31/00
Filed: 1933-06-22
Abstract: 406,181. Knitting. MEIWALD, F., 34, Sturzgasse, Vienna. June 22, 1933, No. 17781. Convention date, June 22, 1932. [Class 74 (ii).] Machines for knitting single or multiple ply tubular yarns are provided with a needle cylinder 1 driven at constant speed and one or more lifting rings 4 surrounding the needle-butts 3. The rings 4 are moved up and down bv mechanical electrical hydraulic or pneumatic means, the number of lifts per revolution being varied by the use of variable speed gears. If the number of lifts divides into the number of needles it is possible to work two or more tubular cords simultaneously. The stroke can be varied by adjusting the point of attachment of a camactuated rod 12 to the lever 13, or by moving the fulcrum 14. A lifting ring may be carried by jacks, the butts of which run in a cam groove with, say, four lifts.
Patent GB-665326-A (GB)
Title: Apparatus for treating gases with liquids
Inventor: NORMAN WILLIAM STEPHENS
IPC: B01J19/32
Filed: 1949-07-06
Abstract: 665,326. Treating gases with liquids. C.D. PATENTS, Ltd. Oct. 24, 1949 [July 6, 1949], No. 17907/49. Class 55 (ii). [Also in Group XIII] In packing for scrubbing or cooling towers, distillation columns, &c., composed of successive grids of upright slats 12, the grids are spaced apart from <SP>3</SP>/ 16  to “ inch and their lower edges so shaped that dripping liquid falls freely drop by drop without formation of spray and each drop causes a ripple to be formed in the film on the slat beneath. The bottom edge of the slats is preferably serrated as by arcuate or triangular notches 13 to provide a series of drip points 14 and the top edge may also be serrated. The grids may be arranged so that the slats of adjacent grids are at right-angles to each other and those in every second layer lying in the same vertical planes. Or they may be staggered so that those in every fourth layer are coplanar. The grids may be spaced from one another by slotted distance-pieces 18 very few of which are required. Liquid may be distributed on to the topmost grid through vertical slots in the sides of supply troughs.
Patent GB-516119-A (GB)
Title: Improvements in or relating to the operation of cupola furnaces for the production of cast iron
IPC: C21B11/02
Filed: 1938-06-16
Abstract: 516,119. Cast iron. DEUTSCHE EISENWERKE AKT.-GES. June 16, 1938, No. 17925. Convention date, June 21, 1937 [Class 72] In the production of cast-iron from pig iron or pig iron and iron scrap in cupola furnaces, the normal quantity of coke is loosely mixed with an additional heat carrier of steel or other iron poor in carbon in a form having a large surface and a small cross-section such as wool, shavings, turnings, sheet waste or sheet boxes. The steel wool is added in such quantities, e.g., 5-40 per cent. by weight of the coke, that the heat developed results in an increase in the melting temperature of the iron without appreciably influencing its carbon content. Specification 516,057 is referred to.
Patent GB-690630-A (GB)
Title: A new or improved compensating mechanism
IPC: F16H35/00
Filed: 1950-07-18
Abstract: 690,630. Embossing. TURNER TANNING MACHINERY CO., Ltd., and HALL, C. July 3, 1951 [July 18, 1950], No. 17928/50. Class 100(ii) [Also in Group VIII] An embossing machine, in which an operating member presses against a surface and is supported by a counter surface, is provided with mechanism for compensating deflections of the surfaces in the direction of pressure, whilst maintaining a guide or other device substantially in an unchanged position, the mechanism comprising a lever and linkage system including a link connected to the operating member and pivoted to a lever which follows the deflection of the counter surface, and a supporting member for the guide or other device pivoted on the lever. As shown, the mechanism is included in a machine of the type described in Specification 666,614 in which leather is embossed against platen 1 by roller 7 mounted on travelling carriage 6. Link 13 is attached to the roller shaft and is pivoted at 14 to two levers 15 the other ends of which are loosely mounted around the spindles of the carriage wheels 16. Arms 18 are pivoted at intermediate points of the levers 15 and support hydraulic cylinder 9 which moves with the carriage. Differences in the deflections of the guides 2, 5 may be allowed for by varying the position at which the arms 18 are pivoted on the levers 15. The levers may be constituted by pairs of side-byside arms rigidly connected, the longer arms being attached to the link 13 and the shorter arms to the members 18.