baber/WOPTO huggingface dataset:
Patent GB-1487301-A (GB)
Title: Hydrostatic pumps
IPC: F04B1/047
Filed: 1974-09-04
Abstract: 1487301 Reciprocating pumps INDUSTRY SECRETARY OF STATE FOR 4 Sept 1974 [4 June 1973] 26611/73 Heading F1A [Also in Division F2] A pump, e.g. for a vehicle hydrostatic transmission, comprises a container 86 connected to a pump working chamber 80 via passage 85 and connected via a non-return valve 89 to the system outlet, the container acting to regulate the pump delivery to the outlet by storing energy by compression of the liquid within the container, expansion of the container, deformation of elastomer inserts in the container or deflection of a spring-loaded piston within the container. In the radial piston pump shown, each spring-loaded piston 81 has a ball engaging a rotary two-lobed cam track 83 and liquid enters the pumping chamber 80 from inlet 97 via passages 102 in a rotary pintle valve on drive-shaft 78. Liquid delivery is effected via container 86, non-return valve 89 and pintle valve passage 103. In a hydrostatic transmission, the pump shown can provide engine braking by being driven as a motor by the vehicle wheel motors acting as pumps during over-run. In Figs. 1 and 2 (not shown), opposed pairs of pistons (12) are reciprocated in axial cylinders by axiallyacting, two-lobed cam members (14) on a driveshaft (6), each cylinder being connected to a respective container (18) and the cylinder and container being connected to a respective inlet and outlet via non-return valves (19), (25). A hydrostatic transmission circuit is described (see Division F2).
Patent GB-164999-A (GB)
Title: Improvements in and connected with evaporative surface condensers
IPC: F28B1/00
Filed: 1920-09-17
Abstract: 164,999. Beardmore, Sir W., and Galbraith, A. Sept. 17, 1920. Fixed-chamber apparatus.-In apparatus for intermittently wetting the tube of a surface condenser, water flows by gravity from a cylinder, having a slide-valve W opening alternately the inlet and discharge parts M, V. A piston U1 moved backwards and forwards by the entering water has a rod U2 carrying a slotted arm U4, the ends of which engage alternately with a trigger W<1> adapted to throw over a spring-controlled pivoted plate X operating the slide-valve. Shoulders on the pivoted plate are forced in turn by the spring against a projection X1 on slide-valve rod X2.
Patent GB-669953-A (GB)
Title: Improvements in or relating to control circuits for discharge tubes
IPC: H01J13/34
Filed: 1949-10-18
Abstract: 669,953. Metal-vapour discharge apparatus. IGRANIC ELECTRIC CO., Ltd. Oct. 18, 1949 [Nov. 12, 1948], No. 26718/49. Class 39 (i). A liquid-cathode discharge device has two or more ignition electrodes in contact with the cathode, the anode being connected to the neutral point of a source of ignition voltage connected between the two electrodes. The ignition electrode may comprise (a) specified proportions of ball clay, hard glass and a carbide, e.g. tungsten carbide, or (b) the oxides of barium, strontium and titanium mixed with starch solution and silicon carbide. The mixture is screened, plasticized, shaped and fired. The electrode may be a cylindrical rod, the upper end of which has an annular groove housing a connecting wire; it may have a reduced end-portion 4a, Fig. 2, surrounded by a skirt 4b. In another form, the electrode 4, Fig. 2, is made of porcelain, glass or clay, which is dipped in the mixture (a) or (b) above, coated with 100 mesh carborundum crystals, dried at 1400‹ F. and fired in vacuum at 1400‹ C. High-voltage surges in the supply lines L, Fig. 5, are eliminated by two starting electrodes 20 connected to the step-up transformer 22, the centre-tapping of which is connected to the anode 12. The starting impulse is produced by closing switch 15 in the circuit of primary winding 23 and condenser 14. Mercury film which may be formed on the ignition electrodes is evaporated by leakage current from the mains. The Specification as open to inspection under Sect. 91, states also that only one ignition electrode, energized by the transformer 21, may be provided. This subject-matter does not appear in the Specification as accepted.
Patent GB-385677-A (GB)
Title: Improvements in and relating to dyeing with azo dyes and vat dyestuffs
IPC: D06P1/24
Filed: 1931-09-25
Abstract: In dyeing with azo and vat dyestuffs a leuco vat dyestuff and an azo coupling component are applied to the material side by side and the material is then brought into contact with a diazonium solution after, or simultaneously with oxidation of the vat-dyestuff.  The diazo solution may contain an oxidizing agent and an alkaline earth metal salt; the latter slows down the rate of coupling and increases the rate of oxidation.  The process is particularly suitable for use with slow coupling components.  In examples, (1) cotton is printed with pastes consisting of (a) Naphthol AS.LB oleine, caustic soda and starch tragacanth, and (b) Caledon Jade Green, British gum, caustic soda and Rongalite C, and after ageing is treated with a diazo solution containing Fast Red TR, acetic and formic acids and sodium dichromate, or alternatively oxidized with acetic acid and hydrogen peroxide and developed with Fast Red TR, (2) Indanthrene Golden Yellow RK is used as the vat dye and the material is treated with a solution containing Fast Red TR, hydrogen peroxide and calcium acetate or magnesium sulphate.
Patent GB-279633-A (GB)
Title: A new and improved safety fastener for non-skid chains and devices of a similar nature
IPC: B60C27/08
Filed: 1926-10-27
Abstract: 279,633. Sanders, J. E. Oct. 27, 1926. Hooks, closed.-A hookcoupling for chains &c. comprises a double-ended hook a having a casing b which slides on the body of the hook and has portions d cut out at each end to receive a link engaging one hook when a link is engaged with or released from the other hook the casing being: normally held in central position by coinciding, indentations c.
Patent GB-1438870-A (GB)
Title: Method and apparatus for recording images on electrophoto graphic film
IPC: G03G15/00
Filed: 1973-06-06
Abstract: 1438870 Electro-photographic process COULTER INFORMATION SYSTEMS Inc 5 June 1973 [8 June 1972] 26889/73 Heading G2H An electro-photographic process comprises charging a photo-conductive film F at 24 to a peak voltage, immediately after charging imagewise exposing (e.g. using a projector 56) and, immediately after exposure, toning at 84; a photo-cell 32 detecting image light intensity in order to control the peak voltage in inverse relation to the light intensity. The process is particularly intended for making high resolution microimages. Preferably the film comprises a Mylar (TRM) base coated with indium oxide then CdS. As shown, differential amplifier 36 is connected to photo-cell 32 and an electrometer 34 to control a relay 42 connecting voltage source 46 to coronade 24. When amp 36 terminates charging a shutter 58 is opened to expose the film and is closed when the charge on an unexposed area sensed by electrometer 34 has decayed to a predetermined level. As soon as exposure is terminated, liquid toner is pumped to a head 84 and applied under the influence of an electrode 92, whose bias is optionally controlled by electrometer 34. A pump 109 removes excess toner and a heater 126 fixes the image, In Fig.3 (not shown) a rotating drum (109) carries the various processing stations past the film.
Patent GB-323043-A (GB)
Title: Improvements in sound recording or reproducing devices
IPC: G10K13/00
Filed: 1928-09-20
Abstract: 323,043. Beatty, W. E., (Bell Telephone Laboratories, Inc.). Sept. 20, 1928. Sound-box casings; tool-arm mountings.-Relates to sound recording or reproducing apparatus comprising a diaphragm, one side of which is coupled with a horn and the other side is enclosed by a chamber communicating through passages with the surrounding air. According to the invention, the passages are of such small cross-section that the impedance to air flow which they present is a substantially pure resistance at all important speech frequencies. When the invention is applied to a gramophone sound-box, the tool.arm is carried by a flexible diaphragm mounted in an airtight manner in a wall of the chamber, this diaphragm being stiffened by a diametral rib. In the gramophone sound-box shown in Figs. 1 and 2, over one side of the sound-reproducing diaphragm 1 is arranged a plate 6 shaped to form a cavity leading to a horn 20, preferably of the exponential type. At the other side of the diaphragm, the sound-box casing provides a chamber which is closed by a plate 8 having a ring of holes 13. These holes are almost closed bv an acoustic resistance device 12 which, in the form shown, consists of a spiral of fine metallic ribbon, mounted in an annular recess behind the holes 13 in the plate 8. The spiral is wound with closely-spaced turns, thus forming very narrow parallel-walled passages (e.g. 0.005 inch wide), to the holes 13. The device 12 may be replaced by a flat ring of porous material, such as that known by the registered Trade Mark " Celotex." The stylusbar 3 is mounted on a small diaphragm 9, the bar being made in two parts screwed together. A stiffening rib is provided along a diameter of the diaphragm 9, parallel to the plane of the main diaphragm 1. Fig. 3 shows a modification in which the air leakage in the sound-box chamber on the side of the diaphragm opposite to the horn is provided by forming narrow peripheral slots in the annular wall of the chamber. This wall is built up of rings 18, 19 separated from each other by projections 17 to provide the slots between the rings, portions of which are bevelled as shown. The chamber having the air resistance passages (such as at 12) is preferably so proportioned to the cavity 6<a> on the other side of the diaphragm that, at all important speech frequencies, the ratio of the elasticities of the volumes of air in the said chamber and cavity is the same as the ratio of the resistance to air flow produced by the passages to the resistance imposed by the horn. This ratio may be less than 1 :5 and is preferably 1 :10. Formulae are given to enable this proportioning to be carried out. Specification 310,493 is referred to.
Patent GB-1463795-A (GB)
Title: Local surface analysis
IPC: H01J49/16
Filed: 1975-06-25
Abstract: 1463795 Ion beam surface analysis AGENCE NATIONALE DE VALORISATION DE LA RECHERCHE 25 June 1975 [28 June 1974] 26983/75 Heading H1D A sample 15 is subjected to surface analysis by bombarding the surface with a scanned beam 17 of primary radiation, which can be electromagnetic, e.g. from a laser or of particles such as oxygen ions, causing the sputtering of particles from the sample surface, these particles including ions, atoms and groups of atoms which pass into a chamber 26 maintained at a high temperature such as 2200-3000 K. where they are subject to repeated adsorptions and desorptions resulting in substantial dissociation and ionization before they leave the chamber 26 and enter the input lens 14 of a mass spectrometer. The chamber 26 has offset entrance and exit apertures 27, 28 or a "venetian blind" grid, Fig. 6 (not shown) to prevent direct passage of particles through the chamber which can be made of a refractory carbide, tantalum, tungsten or rhenium heated by an electric current. The chamber is held between copper plates 19, 20 which have cooling fluid passages between their free surfaces and metal sheets 32, 33. The chamber 26 can be substantially closed as shown or can consist of two rhenium strips of opposed curvature clamped together at their ends, Figs. 4, 5 (not shown).
Patent GB-223743-A (GB)
Title: Improvements in tuning devices for wireless telegraphy and telephony
IPC: H01F27/00
Filed: 1923-10-29
Abstract: 223,743. Egerton of Tatton, Lord. 0ct. 29, 1923. lnductances. - The inductances 1, 2 of a tuning device for wireless telegraphy &c. are supported radially from tubular pillars 3, 4 of insulating material. The pillar 3 is rotatable upon a holder 5 carried by a base 6 which is mounted on a base board 8 by a pivot 7 eccentric to the axis of the pillar 3. The pillar 4 has an extension which is a frictional fit in a sleeve 9 rotatable in a socket eccentric to the pivot 11 of a base 10. The sleeve 9 is formed at its upper end with worm teeth engaging by a worm at the end of a shaft 13 rotatable by a hand wheel 15 and mounted in bearings in the pivot 11. The inductances may be given large angular adjustments by rotating the pillars 3, 4, for which purpose handles may be provided, and fine adjustments may be effected by the worm shaft 13. The pivotal mounting of the bases 6, 10 enables the inductances to be moved apart or together in any desired angular attitude. If one of the bases is completely turned round the mutual inductance will be reversed. More than two inductances may be similarly mounted.
Patent GB-1394744-A (GB)
Title: Filtering spatial frequencies
IPC: G06V10/88
Filed: 1972-06-09
Abstract: 1394744 Spatial filtering; television PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 9 June 1972 [12 June 1971] 27076/72 Heading H4F Spatial filtering of a transparent object 10 is effected by opening a Fourier transform of the object using coherent light 5, locating a spatial filter 12 in the transform plane, separating out images filtered in different manner, treating the filtered images as at 25, 26 and mixing the treated filtered images to give a single output display 28. A beam splitter 22 may be used to give two transform spectrums of the object; a filter, e.g. 12 may be located only in one transform plane, or each transform plane may have an appropriate filter. The filtered signals are fed to television cameras 23, 24 and processed in modulators 25, 26. If desired only one transform plane may be used with the beam splitters and cameras located after that plane. Alternatively only one camera may be used and the first filtered function stored for processing and mixing with a second filtered function at a later time. The single camera may be for colour and the wavelength of the coherent light adjustable. The filter may be optical and comprises two opposed wedge-shaped portions disposed symmetrical about the optical axis with a central portion permitting passage unaltered of the zero order. Two such wedge filters may be used and may be rotated relative to each other to give a variable filter function.
Patent GB-493397-A (GB)
Title: Improvements in or relating to photographic cameras provided with means for the removal of disturbing light reflections in making exposures
IPC: G03B17/12
Filed: 1937-10-06
Abstract: 493,397. Photographic cameras, ZEISS IKON AKT.-GES. Oct. 6, 1937, No. 27125. Convention date, Oct. 31, 1936. Addition to 483,500. [Class 98 (i)] Three polarization filters 1, 2, 3 are mounted on a camera in front of respectively the objective, the view-finder, and a photo-electric exposure meter housed in the camera, and are coupled together as by flexible shafts 4, 5 for simultaneous adjustment. The finder may have a viewing aperture common with a telemeter. The Specification as open to inspection under Sect. 91 describes also a gear-wheel coupling between the filters. This subject-matter does not appear in the Specification as accepted.
Patent GB-1477250-A (GB)
Title: Segmented heater for band sealers
IPC: B29C65/00
Filed: 1975-06-26
Abstract: 1477250 Seaming non-metallic sheet material DOMAIN INDUSTRIES Inc 26 June 1975 [24 Feb 1975] 27141/75 Heading B5K [Also in Division B8] A machine for closing and sealing bags by welding together film layers forming the ends of each bag comprises a pair of endless heat transfer bands 16, 17 having runs confronting each other, and elongate heater bars 20 supplying heat to and extending along the confronting runs of the bands 16, 17, each bar 20 having a plurality of heat transfer slides 25 mounted in a slot 23 therein and movable transversely of the bar in continuous contact with the respective band as the band moves with the film layers, springs 31 being provided to urge the slides 25 towards the bands 16, 17. As shown, the tops of the bags are conveyed along a slot 13 in the machine frame 12 by end-  less chains 15. The bands' 16, 17 may be made of steel with a slippery plastics coating or of fibre glass and are trained around wheels 18, 18.1 and 19, 19.1, respectively, the wheels 18, 18.1 being offset relative to the wheels 19, 19.1 to accommodate film layers of differing thicknesses. The bars 20, preferably made of steel, are heated by electrical elements 22 and have slots 23 which receive freely slidable, tiltable rectangular section slides 25 formed of copper, brass or carbon. The ends of the slides 25 are guided by pins 25. Each slide 25 is retained in the bar 20 by a readily removable pin 27 extending into an opening 28 in the bar 20. A coverplate 29 underlies the bar 20. Compression springs 31, adjustable by screws 32, act on rods 30 to urge the slides 25 against the bands 16, 17. In a modification, Fig. 8, the heater bar 20.1 is heated by a flat heating element 22.1 applied to the upper surface thereof.
Patent GB-926533-A (GB)
IPC: F26B13/16
Filed: 1959-08-07
Abstract: The invention comprises amides of the formula <FORM:0926533/IV(a)/1> (wherein R1 is a hydrocarbon radical of at most 5 carbon atoms, R2 and R3 are hydrogen, methyl or ethyl, R4 and R5 are hydrocarbon radicals containing at most 4 carbon atoms, R7 is hydrogen or an alkyl radical of at most 5 carbon atoms, and R6 and R8 are hydrogen, chlorine, hydroxyl or alkyl, alkoxy or alkenyloxy of at most 4 carbon atoms) and the preparation thereof by (1) reacting an appropriate a :b -unsaturated acid or reactive derivative thereof, e.g. a halide, anhydride, ester or azide, with an appropriate amine; or (2) eliminating water or an acid from an appropriate p  a - or b -hydroxycarboxylic acid amide or an ester thereof with an inorganic or organic acid; or (3) dehalogenating an appropriate a :b -dihalocarboxylic acid amide; or (4) shifting the double bond in a corresponding b :g -unsaturated carboxylic acid amide, e.g. by heating with alkali.  These processes are described in some detail and a number of examples are provided.  2-Ethyl-hexenoic-(2)-acid is prepared by dehydrobromination of 2-bromo-2-ethyl-hexanoic acid.  The amides of the invention, which are stated to have use as narcotics, sedatives and hypnotics, may be made up into pharmaceutical preparations suitable for intravenous injection with the use of diluents such as propylene glycol.
Patent GB-271819-A (GB)
Abstract: 271,819. Bots, R. H., and Soc. Anon. Produits Chimiques Coverlin. May 25, 1926, [Convention date]. i-Eugenol; vanillin.-Eugenol is converted into i-eugenol by heating with caustic potash in the presence of an amino compound such as aniline or o-toluidine. In examples, oil of cloves is heated with caustic potash solution, and after the terpenes have distilled, aniline or o-toluidine is added and the heating continued, then excess of caustic potash is drawn off, and if aniline is the solvent part of it is allowed to distil off. On cooling the liquid is transferred to another vessel and treated with nitrobenzene and caustic soda for the manufacture of vanillin, or, if o-toluidine is the solvent used, the i-eugenol is separated from the solution by steam distilling and acidifying. The Specification as open to inspection under Sect. 91 (3) (a) states that the invention is applicable to compounds of the allyl-phenol group and that o-anisidine may be used as the amino compound. This subject-matter does not appear in the Specification as accepted.
Patent GB-838833-A (GB)
Title: Expansible rotary drill bit
IPC: E21B10/34
Filed: 1958-08-25
Abstract: 838,833. Well boring. KAMMERER, A. W. Aug. 25, 1958, No. 27201/58. Class 85 In a rotary drill bit of the expansible type, for enlarging the well bore below a well casing, the cutters are of unequal cutting lengths so that, although they can be collapsed within the confines of the well casing, when they are expanded the enlarged bore produced is of greater diameter than would be the case if cutters of equal length were used. The invention is shown as applied to the drill bit described in Specification 766,242, two cutters 61 and one cutter 61a being journalled on pins 60 projecting from the cam-actuated arms 36, 36a. When the arms are fully expanded by fluid pressure as in Specification 766,242, the cutters 61 leave an inner ridge H, on the formation shoulder C, which is immediately removed by the longer cutter 61a.
Patent GB-1067760-A (GB)
Title: Magnetic recording mechanism
IPC: G11B15/44
Filed: 1965-06-28
Abstract: 1,067,760. Recording and play-back. BELL & HOWELL CO. June 28, 1965 [June 26, 1964], No. 27254/65. Heading G5R. In a reversible multi-track tape recorder the erasing head 33 and record/play-back head 34 are mounted on an arm 36 which rotates 180 degrees when the direction of the tape is reversed. The larger bevel gear 49 drives the smaller bevel gear 44 which is coupled to the shaft, and a member 63 connected to the larger bevel gear operates a linkage 62, 54, 51 and 52 which holds the tape away until the heads are in their new position. In other embodiments the linkage moves the capstan and pressure roller assembly. In a further embodiment the tape is not moved and the head assembly is pivoted and drawn back by the linkage alongside its axis of rotation so as to reduce the necessary clearance.