baber/WOPTO huggingface dataset:
Patent GB-336331-A (GB)
Title: Artificial impedance for telephone repeaters
IPC: H04B3/14
Filed: 1929-07-29
Abstract: 336,331. Soc. des Telephones Gramont. Nov. 24, 1928, [Convention date]. Repeating and amplifying s y s t e m s ; attenuation equalizers and similar impedance networks. - The impedance of a repeater circuit is made equal for all frequencies to that of the incoming line section 1 by the insertion of a network 14 between the hybrid coil 5 and the input transformer 11 of the valve 12, the network comprising a low-inductance coil in each line-wire shunted in part or wholly by a condenser, and' a variable condenser connected between the linewires and serving as the sole means for adjusting the impedance of the network. In one form, Fig. 2, each inductance coil comprises two windings, all four windings 15 - - 18 being wound on the same core but with the coils of each pair 15, 16; 17, 18 wound in opposite directions. Condensers 19, 21 bridge the coils 16, 18, and the variable condenser 22 is connected between the junctions of each pair of windings. In another form, each coil comprises a single winding wholly shunted by a condenser and the variable condenser is connected between corresponding ends of the coils. Specifications 287,847 and' 292,144 are referred to.
Patent GB-771217-A (GB)
Title: Improvements in or relating to photographic roll films
Inventor: THORNTON JOHN WILLIAM NOAH
IPC: G03C3/02
Filed: 1955-08-12
Abstract: 771,217. Photographic roll films. ILFORD Ltd. Aug. 12, 1955, No. 23316/55. Class 98(1) A photographic roll film having a paper backing strip tapered at its outermost end is sealed with a sealing strip which bridges the tapered end, which is not folded, and the underlying outer coil of paper and which is stuck only along its marginal edges to itself or to the backing strip or both and is provided with a free end not so stuck, the sealing strip being so located with respect to the tapered end of the backing strip that the extreme terminal edge of the backing strip lies wholly between the stuck marginal edges of the sealing strip. As shown, the backing paper 2 terminates in a tapered portion 3 and the roll is sealed by the paper strip 4 which is stuck at its margins 5 partly to itself and partly to the backing paper 2. The strip 4 has a free end 6, and on stripping this away the paper 4 tears along the margins and uncovers the tapered end 3 of the backing paper, which can then be pulled to cut through the remaining marginal strips.
Patent GB-517834-A (GB)
Title: Improvements in or relating to apparatus for playing a game
IPC: A63F9/00
Filed: 1938-08-08
Abstract: 517,834. Punch-board games. LYLE, F. G. Aug. 8, 1938, No. 23375. [Class 132 (ii)] Apparatus for a game comprises a board with equally spaced apertures 4 covered on both sides with paper or metal foil 6, 7 and housing prize tokens in the form of cardboard or paper discs 5 located according .to the positions of towns or places on a geographical area or plan indicated on the board. The players 'eject the discs with a punch making use of their knowledge of the plan in determining the positions of the towns or places. Two perforated cards 2, 3 may be secured outside the paper &c. covers,for protection. Place names 8 and scale indicator 10 may be marked on the board.
Patent GB-461642-A (GB)
Title: Improvements in and connected with spring and steering systems for road and rail vehicles
IPC: B60G11/14
Filed: 1935-08-20
Abstract: 461,642. Vehicle spring-suspensions; springs. AKTIESELSKAPET STROMMENS VAERKSTED. Aug. 20, 1935, No. 23423. Convention date, April 9. [Classes 108 (ii) and 108 (iii)] In vehicle independent wheel spring suspensions a spring system is employed comprising a cylinder and piston with a number of helical springs arranged in the cylinder and adapted to carry the load progressively the springs being so chosen that the relation between the increase in the spring power and the compression of the piston divided by the total force of the spring for that compression remains constant throughout the range of the piston's stroke. Figs. 1 and 3 show upper and lower links or levers 1, 2 pivoted to the chassis 5 at 3, 4 and to a bearing block 8 at 6, 7. The bearing block 8 serves to mount the wheel 9 by means of an axle journal 21 secured to the wheel and in the case of a rear wheel drive having universal couplings 22, 23 with the wheel drive shaft 24. The bearing block also serves to mount at 28 the brake shoes which act, by means of the brake cylinder 29, on the rim 30. The spring arrangement comprises a cylinder 10, piston 13, piston rod 14 and coaxial helical springs 16 .. 18 arranged to come into action successively so that the spring resistance is progressive. The arrangement is such that the spring assembly is, as shown, oblique with relation to the levers 1, 2. In the case of a front wheel as shown in Figs. 7 and 8 a curved bar 35 is, at each end, provided with a double boss, a vertical one for the king bolts or steering swivels 32, which are arranged in the medial plane of the wheel, and a horizontal boss for the pins 37 to which the swing levers 1, 2 are pivoted. Fig. 8 shows the triangle of rods 39 ..,41 for steering, connected by rods 42 to the wheels and by rod 38 to the steering column. The cylinder 10 is filled with oil and the piston is provided with valved apertures 20 to damp spring oscillations.
Patent GB-752421-A (GB)
Title: Improvements in latches
IPC: E05C19/06
Filed: 1954-08-12
Abstract: 752,421. Latches. FROMHOLT, E. G., and ANDERSSON, L. Aug. 12, 1954 [Aug. 13, 1953], No. 23476/54. Class 44. A latch comprises an arcuate spring 2 one end of which is secured to an escutcheon plate 1 adapted to be attached to a cupboard door or the like and the other end of which carries a latch bolt 4 and projects through an opening 3 in the escutcheon plate, the opening permitting compression of the spring so that the latch bolt can, when the latch is fitted to a cupboard or the like, be disengaged from a strike plate 5, and an arcuate finger holder 7 rigidly attached to the escutcheon plate inside the spring, the escutcheon plate or the spring carrying means for preventing longitudinal displacement of the spring in the opening 3 when the spring is compressed. The finger holder can be a curved metal strip, as shown, or it can be a tube which encloses the spring. In the former case the means for preventing displacement of the spring is, as shown, a pin 6 attached to the escutcheon plate and in the latter case it is a push-button which extends through an opening in the finger holder and which also serves to actuate the spring. The finger holder and spring are attached to the escutcheon plate by tongue and slot means.
Patent GB-1035710-A (GB)
Title: Wet back steam or hot water boiler
IPC: F22B7/12
Filed: 1964-06-05
Abstract: 1,035,710. Return tube steam and hot water boilers. CLEAVER-BROOKS CO. June 5, 1964 [Sept. 20, 1963], No. 23508/64. Heading F4A. In a wet back steam or hot water boiler at least two return pass tubes 45 have means to increase heat transfer between the hot gases and the tube walls, and the return pass tubes lead to a manifold 46 beyond a front tube sheet 27, from which heat exchange tubes 31 forming a third pass lead to a rear tube sheet 28 beyond which is a manifold 47. The furnace tube 32 is supplied with combustion gases from a burner 33, Fig. 2 (not shown), and the free end 44 is mounted on aT-bar 40 sliding in a channel 41 to accommodate differences in thermal expansion of the furnace tube and the boiler shell 14. The return pass tubes 45 have dimples 51 which cause turbulent flow within these tubes to increase heat transfer from the combustion gases so that they are at substantially the same temperature as the furnace tube 32, slight differences in expansion of the furnace tube and the return pass tubes being accommodated by corrugations 50. The heat exchange tubes 31 may also have dimples 52 which improve heat transfer. In another embodiment, Fig. 3 (not shown), the dimples 51 are replaced by fins 56 welded to the inside of the tubes. Some of the heat exchange tubes, as indicated by reference numeral 31a are canted so that they are fastened to the rear tube sheet 28 in the area 60 laterally behind the return tubes 45, thus reducing the number of rear tube sheet stays 58 required.
Patent GB-155390-A (GB)
Title: Apparatus for mechanically operating the points of tramways and the like from the vehicles
IPC: B61L11/02
Filed: 1919-09-24
Abstract: 155,390. Smith, C. P. Sept. 24, 1919. Mechanically operated from vehicle.-Points are operated from the vehicle by a rod d and blade c which can be extended from a tubular support or swivelling standard by means of rack and toothed wheel gearing. The rod d may have a rack l engaged by a wheel k which is actuated by a rack j in the inner tube f. The outer tube is carried on a swivel joint h or on trunnions, while a spring n tends to retain the tube vertical. An apparatus is placed on each side of the car at each end. In operation, the wheel g is raised to extend the blade c, the tube e being tilted to place the blade in the rail groove, and the wheel g is then turned to rotate the blade and operate the points.
Patent GB-517943-A (GB)
Title: Manufacture of alcohols of the saturated or unsaturated cyclopentanopolyhydrophenanthrene series or derivatives thereof
IPC: C07J1/00
Filed: 1938-08-11
Abstract: 517,943. Sex hormones. SOC. OF CHEMICAL INDUSTRY IN BASL•. Aug. 11, 1938, Nos. 23713 and 23714. Convention dates, Aug. 16, 1937, and June 8, 1938. [Class 2 (iii)] Alcohols of the saturated and unsaturated cyclopentanopolyhydrophenanthrene series are prepared by reducing compounds of the series containing in the side-chain an ethylene sidelinkage, thereby splitting the linkage. The parent materials may be substituted further by substituted or unsubstituted hydroxyl, hydrocarbon, amino-, carboxyl or keto-groups, halogen atoms or oxide rings and may be derived from, for example, androsterne, pregnane, oestrane or hydro-oestrane..The ethylene oxide rings may be fixed semicyclically to the cyclic frame (formula A) or may be entirely in the side-chain'(formula'B). Reducing agents employed are amalgams alcoholates such as magnesium or aluminium and a secondary alcohol and catalytically activated hydrogen, or electrolytic and biochemical methods may be employed. The ring may also be opened reductively by means of an organic metallic halide or by means of hydrocyanic acid. The products may, if desired, by etherified or esterified. They find application in therapeutics. In the examples (1) the oxide of 17-ethenyl-3-acetoxy-androstanol-(17) on reduction with amyl alcohol and sodium yields 3-epi-allo.-pregnane-triol-(3:17 20), (2) the dioxide of #<5>:<6>-17-ethenyl-3:17- diacetoxy-androstane (prepared from transdehydroandrosterone by addition of acetylene in presence of NH3, partial reduction, acetyl-. ation and treatment with per-benzoic acid) on reduction with hydrogen in the presence of palladium black' and subsequent benzoylation yields 5-hydroxy-3:17-dracetoxy-20-benzoxy pregnane. The parent ethylenoxy ring compounds are prepared by the action of a per-acid, on bodies having corresponding ethylene linkages or by splitting off hydrogen halide from the corresponding halohydrins. The halohydrins are obtained by the addition of hypohalous acid to the ethylene compounds or from aldehydes by reactions with halogen-carboxylic acid derivatives.
Patent GB-1426289-A (GB)
Title: Centrifugal separator
IPC: B04B7/04
Filed: 1973-05-18
Abstract: 1426289 Centrifugal separator FIVES LILLE-CAIL 18 May 1973 [19 May 1972] 23880/73 Heading B1D The resilient (e.g. rubber) annular wall 2 for deflecting solids discharged from centrifugal basket 1 is kept clean by alternately stretching and contracting it 'by means of oscillating ring 6 connected to one end of wall 2, the other end of wall 2 being rigidly fixed to tank 22. In the embodiment shown the ring is oscillated by periodically forcing it downwards against the action of springs 9 by means of two rods 10 (only one shown) when the electromagnets 11 are energised. The wall may have a bead at each end. The ring may be moved by mechanical, pneumatic or hydraulic means.
Patent GB-931629-A (GB)
Title: Vinyl chloride polymerisation process
Inventor: BESSANT KENNETH HENRY CHARLES
IPC: C08F114/06
Filed: 1959-07-11
Abstract: Vinyl chloride is polymerized at -11 DEG  to -60 DEG C. in the presence of a redox polymerization catalyst comprising methyl hydroperoxide, 0,001 to 0,02% by weight of the monomer(s) of an iron compound capable of producing ferrous ions in the reaction medium, and ascorbic acid or the delta lactone produced therefrom. Comonomers may be present in minor proportions, examples mentioned being vinyl esters, ethers and ketones and acrylic and methacrylic acid esters.  Iron compounds mentioned are ferrous sulphate, ferrous ammonium sulphate and ferrous chloride. The methyl hydroperoxide is preferably used as an aqueous solution to avoid the risk of explosion.  The preferred reaction medium is water containing a C1-4 aliphatic alcohol, e.g. methanol, ethanol, glycol or glycerol, as antifreeze.  A suitable emulsifying agent is a mixture of C10-18 mono-alkyl sulphates.  The molecular weight of polyvinyl chloride produced by the process, which tends to be high especially at the lower temperatures, may be reduced by the use of chain transfer agents, e.g. bromo- and/or chloro-methanes or mercaptans.  The process can be used to produce polyvinyl chloride having a density of 1,406 to 1,424 g./c.c.  Such polyvinyl chloride is claimed per se in the Applicant's prior Specification 931,628 which bears a Statutory Reference under Section 8 to Patent No. 895,153. Specific examples describe the homopolymerization of vinyl chloride and the copolymerization of vinyl chloride and lauryl methacrylate.
Patent GB-400751-A (GB)
Title: Improvements in power transmission devices
IPC: H04N1/36
Filed: 1932-08-26
Abstract: 400,751. Epicyclic toothed gearing. RADIO CORPORATION OF AMERICA, 570, Lexington Avenue, New York, U.S.A. Aug. 26, 1932, No. 23961. Convention date, Jan. 28. [Class 80 (i).] In planetary toothed reduction gearing, particularly for driving the turntable of sound recording or reproducing apparatus from an electric motor, wherein each tooth of any gear in the system makes a greater number of contacts with any one of the gear members meshed therewith in a given period than the number of revolutions made by the low speed member relative to a fixed point in the same period, so that any disturbances generated by physical irregularities in the gearing are of relatively high frequency, the gearing includes one gear member which is held against rotation by a shock-absorbing device which serves to damp out the relatively high frequency disturbances. A shaft 13, driven by the motor through a flexible coupling R, is connected to a vertical shaft 2 through bevel gearing N, P. A flywheel G keyed to the upper end of the shaft 2 carries a rotatably-mounted shaft 7 to the ends of which are secured planetary pinions F, U which have unequal numbers of teeth and which mesh respectively with a gear E, secured to a shaft 3 connected to the turntable through a flexible coupling (not shown), and with a gear I which is held stationary by means of a radial arm M which is secured to the hub of the gear I and is connected by a spring L direct to the side wall of the oil-filled housing Z enclosing the gearing and by a spring J to one end of a bellows K, the other end of which is secured to the casing wall. A needle valve associated with the bellows K controls the flow of oil into and out of the bellows. The shaft 2 is supported by an adjustable member 1, the shaft 3 is journaled in a plate 6 secured to the flywheel G, and the hub 9 of the plate 6 is journaled in a plate 8 secured to the housing Z. A second flywheel (not shown) is secured to the shaft 3 above the plate 8 but below the resilient coupling.
Patent GB-587918-A (GB)
Title: Improvements in soft toys
IPC: A63H9/00
Filed: 1944-12-01
Abstract: 587,918. Toys. DOWER, A. L. G. Dec. 1, 1944, No. 24023. [Class 132 (iii)] The leg of a toy animal comprises a rod,. strip or tube of flexible metal, such as a leadcovered electric cable, enclosed in stuffing material and an outer covering.
Patent GB-1215663-A (GB)
Title: Chloroacetyl carbamates and insecticidal compositions based thereon
IPC: F04B39/02
Filed: 1969-05-12
Abstract: 1,215,663. Phenyl-N-chloroacetyl carbamates. TAKEDA YAKUHIN KOGYO K.K. 12 May, 1969 [11 May, 1968], No. 24071/69. Heading C2C. [Also in Division A5] The invention comprises 3,4-dimethyl-, 3,5- dimethyl - and 3 - methyl - 5 - isopropyl phenyl N - methylN - chloroacetyl carbamate. They are prepared by reacting the appropriate N methyl carbamate with a chloroacetyl halide. They have insecticidal activity.
Patent GB-838804-A (GB)
Title: Microwave tube
IPC: H01J25/62
Filed: 1958-07-25
Abstract: 838,804. High frequency discharge tubes. SYLVANIA ELECTRIC PRODUCTS Inc. July 25, 1958 [Aug. 28, 19571, No. 24092/58. Class 39(1). A strophotron electron oscillator comprising an elongated accelerator electrode 10 and two plane reflector electrodes 16, 18 between which electrons injected from a cathode 22 oscillate in a plane parallel to a magnetic field H while drifting sideways to a collector electrode 26, has the inner surface 14 of the accelerator electrode of hyperbolic cross-section, Fig. 2, with the reflector electrodes lying in two planes asymptotic to the hyperbolic surface. The load 28 is coupled between the reflector electrodes 16, 18.
Patent GB-1371153-A (GB)
Title: Oil burner
IPC: F23D11/40
Filed: 1972-05-23
Abstract: 1371153 Oil burner TEXACO DEVELOPMENT CORP 23 May 1972 24172/72 Heading F4T A gun-type oil-burner has a cylindrical blast tube 10 supplied with air under pressure, a fuel nozzle 20 coaxially arranged in the tube at its downstream extremity and supplied with liquid fuel from a conduit (18) (Fig. 4, not shown) to form highly atomized fuel particles, electrodes 24 to ignite the fuel, an air-plate assembly comprising two circular plates 28 and 30 of diameter substantially equal to that of the interior of the tube 10 transversely occupying it upstream of the nozzle and having corresponding spaced apertures 38 and 40 adjacent their periphery so that relative rotation of the plates alters the area of the orifices formed by the apertures, the downstream air plate 30 having struck-out deflecting vanes 42 extending axially and tangentially from a corresponding radial margin of each aperture in the downstream direction to effect substantial swirl in the air flow, and the downstream end of the tube 10 coaxially carrying a frusto-conical collar 44 tapering in the direction of the air flow. The struck-out portions 42 are folded along the corresponding radial margin of each recess 40 in the same sense so that the jets of air issuing from the orifices all spin in the same direction. The plates 28 and 30 are provided, in the central portion, with apertures 49 to provide a limited air flow in the central part of the tube 10 to avoid eddy currents. They also have apertures 52 and (50) (Figs. 6 and 7, not shown), through which insulators 22 pass and apertures (36) and (34) through which screws 32 pass to hold the plates against a spacer block (51) (Fig. 4, not shown) mounted on an electrode holder (52). The apertures (36) and (52) are in the form of slots so that the plate 28 can be rotated about its centre. The gun barrel 10 protrudes from a plenum housing (12) (Fig. 2, not shown) supplied by air from a squirrel cage centrifugal blower driven by a motor (16).
Patent GB-912074-A (GB)
Title: Improvements in or relating to safety locks for use with lifting elements
Inventor: PIGNAL EDMOND
IPC: E05D13/00
Filed: 1959-07-14
Abstract: 912,074. Automatic catches. MACGREGORCOMARAIN S.A. July 14, 1959, No. 24212/59. Class 44. [Also in Group XXX] A safety lock suitable for preventing the sudden descent of, for instance, a hanger door, comprises, at each end of an axle 3 supporting the door, a member 5 which normally assumes the vertical position shown due to the weight of the door acting through the axle 3 and the tension acting on a cable 11. If the cable breaks, however, the member is rotated anticlockwise by a torsion spring 7 so that a projection 17 on the member enters one of a series of apertures 18 in a channel-sectioned member 1 in which the lock slides, the descent of the door thereby being stopped. The invention is also applicable to lifts and mine cars.
Patent GB-841141-A (GB)
Title: Naphthyl esters of n-alkyl-substituted carbamic acids and insecticidal compositions containing the same
IPC: C07C271/06
Filed: 1956-08-08
Abstract: The invention comprises 1-naphthyl-N-alkyl-carbamates wherein the alkyl groups contain 1 to 7 carbon atoms.  Compounds specified are 1-naphthyl-N-methyl-, -ethyl-, -isopropyl-, -n-butyl- and -n-hexyl-carbamates.  They are used in insecticidal compositions (see Group VI).  In examples an aqueous solution of sodium 1-naphthoxide is reacted with a mixture of phosgene and toluene, the organic layer separated and distilled to give 1-naphthyl chloroformate, which is reacted further with an aqueous solution of methylamine or a solution of n-hexylamine in dioxane to give 1-naphthyl N-methyl- or -n-hexyl-carbamate.  Other compounds used in comparative tests for insecticidal activity are specified, i.e. 1-naphthyl - N : N - dibutyl -, N - (N1 : N1 - dimethylaminoethyl)-, N-1-naphthyl- and N-(alpha - methyl) benzyl - carbamates, p - acetylphenyl N - methyl - carbamate, phenyl N : N - dimethyl - carbonate, p - tert. butylphenyl N : N - dimethyl - carbamate and 2 : 3 : 5 - trimethyl - phenyl N - phenyl - carbamate.ALSO:The invention comprises insecticides containing an active ingredient a 1-naphthyl N-alkylcarbonate wherein the alkyl group contains 1-7 carbon atoms (see Group IV(b)) together with one or more inert diluents.  Other insecticide and fungicides may be included.