baber/WOPTO huggingface dataset:
Patent GB-964772-A (GB)
Title: Improvements in or relating to electric amplifiers
IPC: H03G1/00
Filed: 1959-10-20
Abstract: 964,772. Automatic volume control. GENERAL ELECTRIC CO. Ltd., and L. HEALD. Oct. 17, 1960 [Oct. 20, 1959], No. 35587/59. Heading H4R. An amplifier has in shunt a variable impedance network comprising a transistor, the impedance of the network being dependant upon the value of a unidirectional current signal. An amplifier comprising two stages 1, 2, arranged for minimum phase shift has three variable impedance networks 3, 4, 5 so arranged that when a unidirectional control signal is applied to a terminal 8 the impedance, largely resistive, across the emitter-base paths of three transistors 9 is varied so that a greater or lesser fraction of the signal applied to the relevant amplifier stage 1 or 2 is shunted to earth. The control signal is derived from the amplifier output. A constant operating bias is provided from a negative supply line 10. A capacitor 12 forms a low impedance path between the base and collector electrodes of the transistors over the range of frequencies in which the amplifier is capable of operating.
Patent GB-1446778-A (GB)
Title: Isolator
IPC: H01P1/365
Filed: 1973-07-26
Abstract: 1446778 Isolators MITSUBISHI DENKI KK 26 July 1973 [26 July 1972 4 Aug 1972 10 Nov 1972] 35661/73 Heading H1W In a stripline isolator of the kind comprising a ferrimagnetic element arranged at the junction of a main line and a pair of branch lines, one of the branch lines is short-circuited to the ground plane. As shown in Fig. 5, a main line 1a, 1b is provided with branches 4, 5, the latter being open-circuited, the former connected at its end to the ground plane. The lengths and widths of the branch lines are chosen to produce a circular polarization at the junction, and the Specification derives general formulae for these parameters. The forward loss may be reduced by enlarging the area of the junction and, to this end, the widths of the branches are increased at 11, 12. A ferrite element of approximately the same size as the enlarged junction is arranged between the junction and the ground plane. Alternatively, a ferrite substrate may be used. Alternative shapes for the enlarged junction area are described (Fig. 6, not shown). In one example (Fig. 7, not shown), the junction area is rectangular and overlies an elliptical ferrite element, the major axes of the rectangle and the ellipse being aligned with the branch lines. An electrostatic screen may be interposed between the striplines forming the junction and the polepiece (not shown) of the permanent magnet providing the bias field. A number of junctions may be arranged in tandem along the same main line. They may be dimensioned to operate at slightly different resonant frequencies. A "lumped" version of the isolator, comprising a printed inductor 4a and a printed capacitor 5a, is shown in Fig. 11a.
Patent GB-522587-A (GB)
Title: Ventilating system particularly suitable for poultry brooders and the like
IPC: A01K31/20
Filed: 1938-12-10
Abstract: 522,587. Ventilating poultry brooders &c. SORRELL, L. B. Dec. 10, 1938, No. 36033. [CLass 137] The occupants of compartment a are provided with a perforated floor b above a compartment c at the base of which are ventilating shutters d admitting fresh air, the vitiated air escaping either through adjustable windows f or vents e.
Patent GB-1362696-A (GB)
Title: Tri-peptide synthesis
Inventor: FLOURET G R
IPC: C07K5/08
Filed: 1971-07-30
Abstract: 1362696 Tripeptamide ABBOTT LABORATORIES 30 July 1971 [6 Aug 1970] 36063/71 Heading C2C Pyroglutamylhistidylproline amide is prepared by reacting a solution of pentachlorophenyl pyroglutamate in an inert, polar, organic solvent with an aqueous solution of one molar equivalent of histidine dissolved in an equimolar amount of an alkali metal hydroxide at 0-10‹ C. for 5-60 mins., adding to the reaction mixture at least one molar equivalent of proline amide hydrochloride at 0‹ C. to room temperature and after dissolution of the amide, adding 1-2 molar equivalents of an epimerization inhibitor, cooling the resulting mixture with agitation at 0‹ C., adding at least one molar equivalent of a solution of dicyclohexylcarbodiimide in an inert organic, polar solvent, and stirring the mixture at - 10‹ to + 10‹ C. for at least 10 hrs.
Patent GB-799168-A (GB)
Title: Improvements in or relating to frequency selective coupling devices for use on high radio frequencies
Inventor: FEDIDA SAMUEL
IPC: H01P1/213
Filed: 1955-12-16
Abstract: 799,168. Directional coupling devices. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Sept. 7, 1956 [Dec. 16, 1955], No. 36144/55. Class 40 (8). A frequency selective coupling device for use at high radio frequencies comprises a plurality of directional couplers in cascade so constructed as to provide unit (0 db.) coupling. Each coupling device, e.g. of the waveguide, coaxial line, or strip line type, consists of two parallel channels coupled together by at least two transverse auxiliary channels; a band-pass filter being contained in each of the latter. Two coaxial coupling devices (Fig. 1), each of 3 db. type, are joined with their main channels M, A, in cascade, to form a system having terminals 1, 2, 3, 4. Resonant cavity band-pass filters C1 &c. are provided in the auxiliary channels C, and when the complex signal is applied at 1, a signal of the selected frequencies appears at 4, other frequencies at 3, and any other power appearing at 2 is absorbed by a dummy load. In a modification, Fig. 3 (not shown), a second pair of couplers is added with different filters so that two ranges of frequency may be filtered off. In a modification, Fig. 4 (not shown), an oscillator replaces the dummy load at terminal 2 and this load is placed on terminal 4. The filters pass the oscillator frequency, so both this and the signal applied at R reach terminal 3.
Patent GB-1022115-A (GB)
Title: Method of and apparatus for cutting stone blocks
Inventor: PIEPER EBERHARD
IPC: B28D1/06
Filed: 1964-09-05
Abstract: 1,022,115. Sawing stone. MACHINENFABBIK ESTERER A.G. Sept. 5, 1964, No. 36479/64. Heading B5L. A method of cutting a stone block 8, Fig. 1, into slabs 81 comprises positioning the block on supporting slats 11 of easily sawable material, such as wood, filling the spaces which occur between the tops of the slats and the underside of the block, as a result of irregularities in the latter, by a hardenable plastic material 11<SP>1</SP>, and advancing the block and its slats over a stationary plane supporting surface 9, 10 into cutting engagement with the blades 3 of a multibladed gang saw after hardening of the material. The blades 3, which may be without teeth, are tensioned between transverse members 4, 5 of a frame 2, Fig. 2 (not shown), which is vertically reciprocated in a base 1 by a drive consisting of rods 7 connected to the frame and cranks 6 on a shaft 16 rotated by a belt drive. The base supports the work table which is in two portions 9, 10, the blades moving in a gap between the portions. The slats are placed on the table and the filling material 11<SP>1</SP>, such as plaster of Paris, placed on the slats. The block is placed on the material which, when hardened, firmly supports the block. A work frame 12 is placed around the block and firmly secured thereto by adjustable clamping devices 41 and wooden inserts 42, 43. The lateral members 40 of the frame pass between the outermost blades 3 and the saw frame members 2 and engage ribs on the sides 45, 46 of the stationary work-table to guide the frame and block. The undersurfaces of the slats may be coated with material having a low coefficient of friction, such as tetrafluoroethylene or grease, so that the block can easily be fed over the table past the saw blades 3 by the rod 15 of an hydraulic motor 32 in a circuit having an adjustable pressure regulating valve. Vertically adjustable rollers 51 which may be driven and have resilient coverings 52 act to press the block downwardly during the sawing operation. The gap between the portions 9, 10 of the table may be bridged by members 47 having tines 50, 50<SP>1</SP>, Fig. 5 (not shown), between which pass the blades. The members 47 are replaceable by others having tines of different spacing when the saw blades are adjusted or changed for cutting slabs 8<SP>1</SP> of different width. In another embodiment, the tines bridge both members 47 and are separated by spacers.
Patent GB-374453-A (GB)
Title: Improvements in or connected with fastenings for securing railway rails to metal sleepers
IPC: E01B9/32
Filed: 1930-12-05
Abstract: 374,453. Clips for securing rails to sleepers. MILLS, Ltd., J. [Executors of], Bredbury Steel Works, Bredbury, near Stockport, and MACBETH, A., Broadway, The Firs, Bowdon, Altrincham, Cheshire. Dec. 5, 1930, No. 36673. [Class 104 (ii).] Clips for securing rails to sleepers are formed by rolling a bar 12 to a suitable profile and then cutting it transversely into sections to form the clips or to form blanks from which the clips are fashioned. The bar may be formed with a step 13 on the back to rest on top of the sleeper, or this step may be formed on the blank by pressing &c.
Patent GB-1076642-A (GB)
Title: Polytetrafluoroethylene moulding powders
IPC: B29B9/00
Filed: 1964-09-08
Abstract: Free flowing granular powders of polytetrafluoroethylene having a dry sieve size of 300 to 3000 microns, a bulk density of 400 to 850 grams per litre, an uncompacted flow rate of at least 25 and a compacted flow rate of at least 9, are prepared by agglomerating polytetrafluoroethylene powders with an air sedimentation size of less than 100 microns by wetting with an inert liquid having a surface tension of less than 45 dynes per centimetre at 20 DEG  C., mechanically forming the wet powder into agglomerates and drying the agglomerates to remove the liquid. Preferred liquids are at least predominantly organic, e.g. hydrocarbons, halogenated hydrocarbons, ketones, alcohols and alcohol/water mixtures.  Specified liquids are methanol, ethanol, isopropanol, m-hexane, n-xylene, carbon tetrachloride, trichlorethylene, perchlorethylene, acetone, methyl ethyl ketone and methanol/water mixtures.  The agglomerates may be formed by rolling and tumbling the wet powder in a rotating vessel. In a preferred method the wetting and mechanical forming are effected simultaneously by tumbling the powder while the liquid is sprayed on as a fine mist.  In other methods the wet powder may be placed on an oscillating tray, or gently forced through a wire screen. Drying may be effected under reduced pressure under static conditions or with gentle agitation.  Many examples of carrying out the method of the invention are described, and apparatus therefor is described and illustrated.
Patent GB-768650-A (GB)
Title: Vitamin k intermediates
IPC: C07C46/06
Filed: 1954-12-20
Abstract: The invention comprises a 1-monocarboxylic acid ester of 2-methyl-3-phytyl-1,4-naphthohydroquinone and the preparation thereof by reacting a 1-monocarboxylic acid ester of 2-methyl-1,4-naphthohydroquinone in an inert solvent with phytol in the presence of a dehydrating agent that is essentially insoluble under the conditions of reaction, is strongly acidic and does not form esters with phytol.  Preferably the starting ester contains up to 8 carbon atoms in the acyloxy group.  As dehydrating agents there may be used alkali metal bisulphates, e.g. sodium bisulphate or potassium bisulphate, or cation-exchange resins on the hydrogen cycle, e.g. Duolite C-60 or Duolite C-61. The reaction may be effected in the temperature range 65-90 DEG  C. in a solvent such as benzene, toluene, dioxan or ethylene glycol dimethyl ether. Treatment of the 1-monocarboxylic ester of 2-methyl-3-phytyl-1,4-naphthohydroquinone with alkali yields 2-methyl - 3 - phytyl - 1,4 - hydroquinone which may be oxidized to Vitamin K1, e.g. with silver oxide.  Examples describe the production of the 1-acetate, 1-propionate, 1-butyrate, 1-valerate, 1-caproate, 1-caprylate, 1-phenylacetate, and 1-benzoate of 2-methyl-3-phytyl-1,4-naphthohydroquinone and of Vitamin K1. Specification 768,651 is referred to.
Patent GB-1261051-A (GB)
Title: Smoking device
Inventor: FETHER KENNETH BEN
IPC: A24F5/00
Filed: 1969-07-22
Abstract: 1,261,051. Smokers' pipes; tobacco cartridges. IMPERIAL TOBACCO GROUP Ltd. 14 Sept., 1970 [22 July, 1969], No. 36769/69. Heading A2C and A2M. A smoking device comprises a pipe and a tobacco cartridge therefor, the pipe having a bowl 10 and a mouthpiece 11 connected by a passage 12, and the cartridge including a tobacco charge 20 the lower end of which is disposed above the passage 12 and is sealingly engaged with the interior wall of the bowl 10 to provide a sealed connecting chamber between the lower end of the charge 20 and the passage 12. As shown in Fig. 1, the tobacco charge 20 is united by a paper strip 21 to a flanged disc 22 having a perforated wall 23. The disc 22 is mounted on a hollow support 24 provided with a single aperture 25 and sealed by rubber "O" rings 16, 17 located in periperal grooves 14, 15 in the bowl 10 of the pipe. In another embodiment, Fig. 2, the bowl 30 is provided with a metal lining 39, and is closed at its bottom end thus requiring only one sealing ring which is housed in a groove 38. Two further embodiments include cartridges mounted on hollow supports the external cylindrical surfaces of which include spaced circumferential ribs that sealingly engage the lower part of the bowls of the pipes above and below the smoke passages in their stems.
Patent GB-1519445-A (GB)
Title: Printing of webs
IPC: B41F33/00
Filed: 1974-08-22
Abstract: 1519445 Rotary printing IMPERIAL CHEMICAL INDUSTRIES Ltd 6 Aug 1975 [22 Aug 1974] 36939/74 Heading B6C [Also in Division F2] In a rotary printing press for flexible plastics webs a releasable guard is provided adjacent a printing roller, the release of which guard causes the arrest of the press and movement of the roller away from the web. The switching involved may be electrical or hydraulic or mechanical.
Patent GB-867367-A (GB)
Title: Improvements in or relating to interception control computers
Inventor: ATKINSON ERIC HESLINGTON
IPC: F41G9/00
Filed: 1958-11-17
Abstract: 867,367. Electric analogue calculating circuits. DECCA RECORD CO. Ltd. Nov. 17, 1959 [Nov. 17, 1958], No. 36973/58. Class 37. Apparatus for determining the co-ordinate position of an interceptor I, relative to a target T, such that the interceptor may make a turn 11 of radius R on to a new heading and subsequently fly on a straight course 10 to effect interception of the target along a predetermined line of attack with reference the new heading comprises two electric resolvers having inputs of the initial interceptor heading # and the target heading #, respectively, the outputs of the resolvers being electrical signals representing sin #, cos # and sin #, cos #, these outputs being combined and summed in certain proportions dependent on other data supplied to give the required co-ordinates #x, #y representing the position of I 1  with respect to T 1 . For the most general case, i.e. for an attack in any required direction, #x=[r.R(# - # - α)+L.r] sin # - L sin (#+α)-R cos (#+α)+R cos # and #y= [rR(# - # - α)+L.r cos # - L cos (#+α)+R sin (#+α)+R sin #, where r is the ratio of target to interceptor speed, L is the distance of the interceptor at the end of the turn from the point of interception and α is the required attack angle measured from the dead-astern direction. A computer for the particular case of an astern attack (for which α = 0) is shown in Fig. 2. The shaft 13 of sine-cosine potentiometer 12 is turned through the target heading # and the shaft 15 of a similar potentiometer 14 through the initial interceptor heading #, the outputs of the potentiometer being connected to resistors 26 ... 33, representing the following values: R.r(# - #), a, R, R, Rr(# - #), a, R, R [where a=L(1-r)]. The outputs across resistors 26-29 and 30-33 are measured by feedback amplifiers 20, 21, respectively, the outputs of the amplifiers at 24 and 24 corresponding to #x and #y, respectively. A computer for the particular case of a beam attack, when α= #/2 is also described (Fig. 4, not shown). Specification 867,363 is referred to.
Patent GB-1349175-A (GB)
Title: Thrust bearings
IPC: F16C19/30
Filed: 1971-08-06
Abstract: 1349175 Bearings SKF KUGELLAGERFABRIKEN GmbH 6 Aug 1971 [8 Aug 1970] 37134/71 Heading F2A In a rolling thrust bearing in which the two races 1, 2 are encompassed by an external ring 3, the outer peripheries of the races and the inner periphery of the ring are formed with concentric part-spherical surfaces and a ring 4 of bearing material is interposed. The bearing material may be laminated. The centre of the concentric surfaces may lie on the point M 1  (as shown) or the point M.
Patent GB-820852-A (GB)
Title: Improvements in electrical switches and terminal arrangements therefor
Inventor: BUDD WILBERT H
IPC: H01R13/70
Filed: 1955-12-09
Abstract: 820,852. Switch contacts; switches held set and freed mechanically. CHICAGO TELEPHONE SUPPLY CORPORATION. Dec. 9, 1955, No. 37152/57. Divided out of 820,851, [Group XXXVI]. Class 38 (5). A switch, intended to be structurally combined with a variable resistor, has a cup-shaped housing 17 with an insulating end wall 18 carrying L-shaped one-piece contacts 28 and terminals 21, the latter projecting forwardly so that they may extend through apertures in the housing 5 of the resistor when fitted over the front of the housing 17. The movable contact 22 is carried by an insulating plate 23 connected to a spring-urged rectilinearly-movable actuator 16 which is guided by openings in the housing 17. The actuator 16 carries a cam 15 which is engageable by an arm 12 on rotation of a shaft 10 so as to open the contacts, the angle of rotation being limited by the abutment of a lug 13 with a stop 14. In a modification, Figs. 4-6 (not shown), the fixed contacts and terminals comprise rods extending from the base, the plate 23 being guided by a part extending between the terminals.
Patent GB-1171280-A (GB)
Title: Improvements in or relating to Cotton Harvesters
Inventor: FERGASON RECTOR CHARLES
IPC: A01D46/18
Filed: 1968-08-05
Abstract: 1,171,280. Cotton harvesters. ALLISCHAMBERS MFG. CO. 5 Aug., 1968 [25 Aug., 1967], No. 37175/68. Heading AlF. A cotton harvester includes a drum 30 rotatably driven on a vertical shaft 25, a number of rows of rotatably driven picking spindles 37 disposed about the drum, a number of stripper bars 42 movable inwardly and outwardly relative to shaft 25 during rotation of the drum, the strip per bars being provided with a bushing 47 for each spindle, which bushings rotate with and move axially relative to their respective spindle during movement of the strip per bars, and flexible shields 54 one disposed between adjacent stripper bars, to prevent unwanted material from passing between adjacent stripper bars as the bars move relative to their respective picking spindles. The shields 54 are held between the edges of each stripper bar 42 and a front plate 50 which holds the bushing 47 in the stripper bar, the edges 52, 53 of the bars 42 and front plates 50 respectively being chamfered as shown so that each shield folds inwardly between adjacent stripper bars when the spindles 37 are in their picking position as shown on the right in Fig. 3. Each shield 54 is a thin plastics film. The drive to the removable parts may be taken from the power-takeoff of an engine (1) mounted on the machine, which engine drives the wheels (3). Stripper units (12) are mounted each side of the machine, Fig. 1 (not shown).
Patent GB-1465336-A (GB)
Title: Automatic turret lathe
IPC: B23B7/04
Filed: 1974-08-23
Abstract: 1465336 Lathe turret-slide feeding mechanism INDEX-WERKE KG HAHN & TESSKY 23 Aug 1974 [14 Sept 1973] 37179/74 Heading B3T In an automatic turret lathe in which the operation of the feed and return movements are provided by a motor driven cam 32 which actuates a lever 46, 48 to reciprocate the turret slide, the cam being driven from an hydraulic motor 50 via gearing 58, 62, 64, 66, 68 and an hydraulic brake mechanism 54 which acts on the gear cluster 58, 62, the movements of the turret slide are synchronized with the indexing of the turret 16 and turret stop drum 36 the adjustable stops 38, 40 thereon determining the limit of forward travel of the turret. In synchronism with the feed mechanism and connected thereto by gears 70, 72 is a rotary cam drum 74 the cams thereon atuating by way of lever members 84, 86 respective control units 80, 82, unit 80 controlling the operation of the transverse tool slides &c. 24 and unit 82 controlling the rotational speed of the cam by way of the fluid supply to the motor 50 and to the braking mechanism 54 in conjuction with each other so as to permit a rapid approach movement of the turret slide followed by a slow feed movement and subsequent rapid return motion. The control unit 82 is provided with a slide valve 88, 90 axially adjustable by the operation of hydraulic pistons 134, 136, the piston 134 has thereon a control slide 162 which is actuated by a lever 142 as a result of displacement of the lever member 86. This action together with other compensating action controls the movement of the valves 88, 90 to appropriately control the flow of hydraulic fluid in the system so that the brake mechanism is actuated or rest depending on the displacement of the valves 88, 90 without restricting the flow of hydraulic pressure fluid to other parts of the mechanism. Both control valves 88, 90 can be jointly returned to their initial position by way of the pistons 134, 136 before the braking mechanism 54 is released. The control slide 162 movement in relation to the piston 134 provides a time lag permitting the valves 88, 90 to return before the brake mechanism is released.
Patent GB-776809-A (GB)
Title: Improvements in or relating to magnesium-rich alloys
IPC: C22C23/06
Filed: 1955-12-28
Abstract: Alloys of Mg with Zr and rare earth metals have the following composition.  Rare earths 2.0-6.0 per cent. Zr 0.01-0.05 per cent Mg the remainder the rare earth metals in the final alloy having the composition La 25-35 per cent. Pr. 8-12 per cent, Ce 2-10 per cent, Sa 0.5 per cent, Nd 40-65 per cent.  Specification 761,324 is referred to.
Patent GB-1462927-A (GB)
Title: Rapid access metal developers
IPC: G03C5/29
Filed: 1974-08-23
Abstract: 1462927 Metal chelate photographic developer; replenishing developer in processing apparatus MINNESOTA MINING & Mfg CO 23 Aug 1974 [24 Aug 1973(4)] 37234/74 Headings G2C and G2X A photographic developer comprises a ferrous chelate developing agent e.g. ferrous sulphate chelated with ethylenediaminetetraacetic acid or with diethylenetriaminepentaacetic acid, together with (i) an ascorbic acid compound of Formula where X is O or NH and R is a non-interfering group, preferably an aryl group or a group  R<SP>1</SP>CH 2 (CHOH) n-1  where R<SP>1</SP> is H or OH when n = 2-4 and is OH when n = 1, e.g. ascorbic acid or isoascorbic acid, (ii) an ascorbic acid compound of the above formula together with 1-phenyl-3- pyrazolidone, glycine, cysteine hydrochloride, hydroxylamine sulphate, hydroquinone monosulphonate or 4-amino-N-ethyl-N-(#-methanesulphonamidoethyl)-m-toluidine, or (iii) amidol, gallic acid, tannic acid or 2:5-di-tert-butylhydroquinone. The developer may be regenerated by contact with iron metal having a large surface area e.g. steel wool. Exposed light-sensitive photographic material may be developed by passage through a developing tank containing the above developer, a portion of the developer being withdrawn as required through an outlet which is connected to the inlet of a regenerator tank containing metal to regenerate the developer. Regenerated developer may be recycled direct to the developing tank or to a reservoir from which it may be fed in controlled amounts to the tank. A maintenance tank is used to feed replenisher liquid having the same components as the developer to the developing tank to replace developing solution which has been removed while adhering to the developed material. The system may be controlled by flow control devices and detection devices e.g. those measuring redox potential.