baber/WOPTO huggingface dataset:
Patent GB-1427626-A (GB)
Title: Transversal filter
IPC: H03H15/02
Filed: 1973-02-14
Abstract: 1427626 Transversal filter PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 14 Feb 1973 [17 Feb 1972] 7220/73 Heading H3U A transversal filter comprises serially connected elements E 3 -E 4  each comprising a storage capacitor and a semi-conductor device, clock signals being applied to each element to transfer the stored charge between capacitors, at least two current dividers, each having a current input connected to a respective storage capacitor which is not adjacent to the other and two current outputs each connected to a respective input of a difference amplifier S.V. which sums the current outputs of the current dividers to provide a filtered output signal. Each semiconductor may be a field-effect transistor T 0 - T 5  and each current divider two source connected field-effect transistors T 00 , T 01 -T 40 , T 41 . The current dividers are appropriately biased by a setting register P to obtain the desired frequency response characteristics. An offset error of the characteristics can be substantially corrected for by alternating the inputs to the summing amplifier S.V. or those to the current dividers during filtering. Each even numbered capacitor C 0 -C 4  may comprise a plurality of capacitors each connected to a respective current divider (Fig. 4, not shown), the gate of each transistor T 0 , T 2 , T 4  being connected to the input .c of the amplifier S.V. This embodiment may be used for both digital and analogue signals. The difference amplifier S.V. may comprise two differential amplifiers A, B (Fig. 3, not shown) arranged as Miller integrators each with one input connected to earth and the other to receive any output currents. The register P may comprise a dynamic type (Fig. 3) using clocked field-effect transistors or a clocked bistable type. A field-effect transistor may be connected in parallel with each current divider field-effect transistor to improve linearity of each current divider (Fig. 5, not shown).
Patent GB-697307-A (GB)
Title: Improvements in or relating to the manufacture of carbon paper
IPC: B41M5/10
Filed: 1951-03-28
Abstract: 697,307. Carbon papers. WAGNER VERWALTUNGS-GES., G., [trading as WAGNER, G. [Firm of] ]. March 28,1951 [May 11, 1950], No. 7229/51. Class 100(iv) A method for the manufacture of carbon paper of the kind wherein the papers when in the pulp stage are treated with a dye of a colour other than black, consists of applying a non-translucent layer containing, e.g. soot which does not transfer its colour with the transfer layer which is applied over the intermediate non-translucent layer. Carbon papers with a coloured base sheet after use become translucent and are in consequence often prematurely regarded as exhausted; the intermediate layer overcomes this and consists of natural or artificial resins incorporating soot or other suitable pigments. In an example 15 parts polyvinyl acetate are dissolved in 25 parts organic solvent of medium boiling point in which is ground 10 parts of soot. The whole is then made up to 100 parts by spirits which may include a small quantity of aniline dye and tannin. When applied to the paper the solvents evaporate on heated rollers of the machine and are removed by suction. The reverse side of the paper may be waxed with a colourless wax layer, to prevent curling.
Patent GB-1070011-A (GB)
Title: Improvements in extrusion presses
Inventor: FOOKS JOHN CARTER
IPC: B29C48/06
Filed: 1963-02-22
Abstract: 1,070,011. Extension die liner assemblies. COAL INDUSTRY (PATENTS) Ltd. Feb. 21, 1964 [Feb. 22, 1963], No. 7232/63. Heading B5A. A die liner assembly for an extrusion press (not shown) comprises at least three longitudinal sections retained in the required nozzle form by a restraint applied at or near the die end of the assembly. The assembly is for use in a press for manufacturing briquettes from coal char and is composed of six identical elongated sections (2) having hard faced surfaces 3. At the end 7 near the press a shallow double step 4 is provided in which a ring element 6 may be shrunk on to maintain the cylindrical form of the nozzle. Alternatively the assembly is made up of three, four, or eight sections.
Patent GB-178089-A (GB)
Title: Improvements in flexible joints for tubes
IPC: G11B3/20
Filed: 1922-03-11
Abstract: 178,089. Hurm, H. April 5, 1921, [Convention date]. Ball-and-socket joints; hinged joints.-A joint suitable for the tone arms of gramophones consists of a spherical surface a<1> on the end of one member a bearing against a corresponding concave surface b<1> on the other member b. The opening at a<1> is smaller than the opening at b<1> to allow free passage in all positions of the joint. The members are held together by a part-spring wire or rod c attached at one end to the middle point of a transverse support a<2>, and the the other end to a boss b<2> provided with an adjusting-nut c' and clamping-screw c<2>. The screw c<2> may be dispensed with and projections provided on the base of the nut c<1> to engage notches in the boss b<2>. A bellows d embracing the joint prevents relative rotation of the members around their longitudinal axes, and this also renders the joint more sound-tight. The Specification as open to inspection under Sect. 91 (3) (a) comprises also a modification wherein the spherical surfaces are replaced by cylindrical surfaces to form a simple hinge instead of a universal joint. This subject-matter does not appear in the Specification as accepted.
Patent GB-1189056-A (GB)
Title: Improvements in or relating to Heat-exchangers in Nuclear Power Plant
IPC: F28F27/00
Filed: 1968-02-14
Abstract: 1,189,056. Reactors. FIVES-PENHOET. 14 Feb., 1968 [15 Feb., 1967], No. 7245/68. Heading G6C. [Also in Division F4] In a steam generator arranged in an upright cylindrical casing 12 with a nuclear reactor and comprising water tubes arranged parallel to the axis of the vessel over which the heating medium flows, the tubes are grouped in small groups extending over zones such as 15... 17 and 20... 22 in which there is only a small variation in temperature of the heating fluid compared with the temperature variations over the whole cross-section of the vessel, the flow of water through each group being regulated individually. Each zone is approximately partannular and has two sets of tubes, e.g. 18, 19, in zone 16, each set being connected to a separate heater having therein a flow control means which may be operated automatically in response to the temperature of the heating fluid in its associated zone and/or in response to the temperature of steam produced in its associated tubes.
Patent GB-582806-A (GB)
Title: Improvements in vibrator screens
IPC: B07B1/42
Filed: 1944-04-19
Abstract: 582,806. Sifting apparatus. NORDBERG MANUFACTURING CO. April 19, 1944, No. 7246. Convention date, March 15, 1943. [Class 117] [Also in Groups XXX and XXXII] In a jigging screen of the kind supported by a series of leaf springs, the screen and the base plate are each provided with openended sockets to receive the ends of the spring leaves, the bottom of each socket being pro - vided with an aperture of such size as to permit, when the clamping means are released, of the withdrawal or insertion of an individual leaf therethrough. Each socket comprises a bottom 15, end walls 16, 18, the latter of which has an inclined face 19, and side walls (not shown). The ends of the leaves 23 are separated by spacers 24 and they are clamped by a wedge element 25 which is actuated by a screw 28. An aperture 20 in the bottom 15 is closed by a projection 21 on a plate 22 which is retained in position by the screw 28.
Patent GB-785721-A (GB)
Title: Air intake assemblies for aircraft propulsion units
Inventor: GILBERT RONALD ALBERT
IPC: F02C7/05
Filed: 1955-03-11
Abstract: 785,721. Gas turbine plant. NAPIER & SON, Ltd., D. Feb. 29, 1956 [March 11, 1955], No. 7268/55. Class 110 (3). An annular air intake for a gas turbine engine from the inner wall of which a solid body or nose projects forwardly has a series of movable deflecting members which, in the inoperative position, lie close to and form in effect part of the surface of the solid body or nose and, in the operative position, project from the solid body or nose so as to lie wholly or partially in front of the annular air intake and deflect the approaching air stream and any solid or liquid particles it may contain outwards such that the solid or liquid particles by reason of their momentum pass over the outer edge of the annular inlet opening whilst at the same time leaving between the rear edges of the deflecting members and the outer edge of the annular inlet opening a substantial annular gap through which air can be drawn radially inwards into the opening. A propeller turbine engine has an annular air inlet opening 10 formed between an outer wall 12 and an inner wall 14. A nose portion 15 projecting forwardly from the wall 14 consists of a near stationary portion 16 and a forward part 17 formed by the propeller hub fairing. A series of flap-like deflecting members 18 are hinged to the forward end of the portion 16 and when in the inoperative position lie flush with the surface of the portion 16. The members 18 are in the form of sector plates having one edge joggled. The joggled edge overlaps the edge of the adjacent member. When the members 18 are in the operative position, they spread out fanwise to form a frusto-conical surface spaced from but directly in front of the forward edge 13 of the inlet opening 10. Thus solid or liquid particles carried in suspension in the air approaching the inlet will be deflected outwards with the air and carried outwards beyond the forward edge 13. The air will pass through the gap 33 into the inlet opening. Each deflecting member is actuated by a pneumatic ram 24. The cylinder 25 of each ram is pivoted by a ball and socket joint 26 to an annular member 27 forming part of a channel 28 which may be connected to a source of air under pressure or to drain through a suitable valve. The members 18 are opened by the air pressure in the cylinder and closed by the springs 32 and the air pressure on the members. If desired, the rams may be made double acting. Hydraulic, electrical or mechanical actuators could be used instead of pneumatic rams. The outer surface of each of the members 18 may have a coating of polytetrafluoroethylene or other substance to which ice does not readily cling.
Patent GB-834159-A (GB)
Title: Rail-fixing device
IPC: E01B9/28
Filed: 1958-03-06
Abstract: 834,159. Securing railway rails. SONNEVILLE, R. P., and GIROD-EYMERY, H. March 6, 1958 [Dec. 7, 1957], No. 7306/58. Class 104 (2). In a rail-fixing device in which clamps hold the rail on the sleeper and bolts, passing through the clamps, are mounted for rocking in the sleeper transversely to the longitudinal axis of the rail, each clamp is provided, at its end opposite to that bearing on the sleeper, with a re-entrant dihedron which fits a corresponding dihedron on a parallel piped-shaped key removably housed in a recess in the upper part of the sleeper. One of a set of keys of various dimensions may be used to enable the device to be adapted to suit various types of rail gauges with a single type of sleeper and clamp. In the arrangement shown, the sleeper T comprises two reinforced concrete blocks 1 tied by an inverted T-section iron 2 embedded at its ends in each block. The vertical web portion of the embedded ends of the iron 2 are provided with two slots 6 which receive the heads 7 of fixing bolts B so as to allow the bolts to rock transversely to the longitudinal axis of the rails R. The top of the slot 6 and the underside of the bolt head 7 are set out on a radius drawn from the point 0. The rail R is held in position by the bolt B through the intermediary of a clamp A. The clamp A is provided on one side with a re-entrant dihedron 21 to engage the flange of the rail R and on the other side with the re-entrant dihedron 19 to engage a key 17, of wood, metal, plastic material or rubber, seated in a recess 13 formed in the concrete blocks 1. Different size keys may be provided to enable the clamps A to secure rails having different size flanges, a different gauge or rails seated on sole plates, in position. The floor 14 of the recess 13 as provided with a slot 16 to enable a tool to be inserted in order to facilitate removal of the key 17. Two horizontal passages 11 provided in each block 1 are offset laterally so as to provide vertical stops 12. The bolt B is inserted in the block at 90 degrees to its final position shown in Fig. 3, and is then rotated until the sides of the bolt-head 7 engage the stops 12, thus ensuring the correct final location of the bolt B. The faces of the dihedrons 19 and 21 may also consist of sectors of cylinders having generatrices parallel to the longitudinal axis of the rail R and being of convex curvature towards the key or rail. The junction of the two convex sectors of each dihedral are joined by a portion of concave curvature. The blocks 1 are reinforced by metal longitudinal bars 3, transverse bars 4 and the helix 5 surrounding the iron 2.
Patent GB-609257-A (GB)
Title: Improvements in the delustring of nylon
IPC: D06M11/22
Filed: 1946-03-09
Abstract: Nylon is delustred by treatment with a solution of antimony trichloride in hydrochloric acid and by addition while the nylon is still in contact with the solution of an aqueous liquor to precipitate antimony oxide upon the nylon.  Excess hydrochloric acid may be neutralized and washed away.  The treating solution may be conveniently prepared by dissolving antimony oxide in aqueous hydrochloric acid of such strength that the resulting solution has a residual acidity of less than 12 per cent of free hydrochloric acid. A table of amounts of antimony oxide soluble in 100 ccs. of hydrochloric acid of varying strengths is given. The preferred method of carrying out the process is to treat the nylon with the solution, remove excess by mangling, and then washing with water.  The process is not applicable to water-soluble nylons.  The time of treatment in the solution should be between 5 seconds and 5 minutes according to the amount of antimony trichloride in the solution.  Pattern effects may be produced by printing or stencilling with a solution thickened with china clay or gum and then immersing in water.  Nylon so treated will dye readily with vat dyes such as are used for cellulosic materials and the delustred effect is stable to laundry washing. In an example, a fabric of woven nylon is immersed in a solution of 10 g. of commercial antimony trichloride in 100 ccs. of 9 DEG  Tw. hydrochloric acid for 1 minute, mangled and rinsed with cold water. In a further example, a nylon fabric is printed with an acid-resisting printing paste and treated in a solution containing 31 g. antimony oxide per 100 ccs. 35 DEG  Tw. hydrochloric acid.  It is passed through cold water and the resist removed forming a white lustrous pattern on a delustred white ground.  On dyeing with Ciba Blue 2B, the delustred fabric is dyed blue, leaving a white lustrous pattern.
Patent GB-512641-A (GB)
Title: Improvements in or relating to hydraulic operating mechanism for valves and other parts having a to and fro movement
IPC: F16K31/14
Filed: 1938-03-10
Abstract: 512,641. Hydraulic apparatus; valves. SHERLOCK, J. E., and BRITISH THERMOSTAT CO., Ltd. March 10, 1938, No. 7520. [Classes 69 (ii) and 135] Hydraulic operating mechanism for valves or other parts having a to and fro movement of the kind comprising a piston or the like and a pump arranged to build up hydraulic pressure upon the piston or the like for moving the controlled part in one direction, a return spring or weight moving the controlled part in the opposite direction when the hydraulic pressure is released, is characterised in that the torque reaction of the pump controls a release valve so that the release valve is closed when the pump is working and is open when the pump is idle. A valve A is operated in one direction by a bellows 1 against the action of concentric return springs 9. A gear pump 14 having an inlet 16 is immersed in a reservoir 4, and driven by an electric motor 26. The pump body is pivotally mounted by a pivot pin 18 coaxial with the driving shaft 19, said pin being hollow and serving to convey liquid from the pump outlet to the interior of the bellows. An arm 20 secured to the pin 18 is, when the pump is inoperative, held by a spring against a stop, so that a part 21 carried by the arm is free of a hole 23 which thus places the interior of the bellows in communication with the reservoir. When the motor 26 is started, the pump body rotates until the arm 20 abuts against another stop in which position the part 21 closes the hole 23 to permit the establishment of pressure in the bellows. The motor 26 may be controlled by a thermostatic or other automatic switching device or by a remote hand operated switch. A screw 11 and bell-crank 12 serve for hand-operation of the valve A.
Patent GB-526127-A (GB)
Title: Improvements in and relating to streamlined cowlings for aircraft engines
IPC: B64D33/08
Filed: 1939-03-08
Abstract: 526,127. Cowlings for aircraft engines. AMIOT, F. March 8,1939, No. 7561. Convention date, March 9, 1938. [Class 4] [Also in Group XXVII] An aircraft engine cowling 3 is formed so that the outer and inner diameters d<1>, d<2> of the annular entrance 1 for the cooling air lie between 60 per cent. and 40 per cent. of the maximum diameter D of the cowling, and the length l of the airscrew spinner is about 30 per cent. to 45 per cent. of the diameter D. The outflow of cooling air may be controlled by flaps 6<1> having side walls 7 or by fanlike flaps 6<2>.
Patent GB-697947-A (GB)
Title: Improvements in or relating to control systems for direct current motors
IPC: B60L7/04
Filed: 1952-03-26
Abstract: 697,947. Control of D.C. motors. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. March 26, 1952 [April 21, 1951], No. 7731/52. Class 38 (iii) Series traction motors 1-4 are supplied from a single-phase source 16 through a transformer 18 having a multi-tapped secondary winding, separate pairs of rectifiers 46 being provided for each motor. During the accelerating operation each of the motors is energized through its own rectifier-assembly and the secondary voltage of the transformer is increased by movement of a master controller M, on the early notches of which the motors are started with weakened field excitation, the shunting contacts Mg-Mj being closed. After the maximum-voltage, full field, motoring position has been reached, high-speed operation with weakened field excitation is introduced, the motor voltage being at first slightly reduced and then gradually restored to its maximum value. During braking operation each of the motor armatures is disconnected from the supply and is shunted across a resistor, the several field windings 22 being energized with rectified current from low-voltage tappings of the transformer. As shown, the series field windings are all connected in series during braking operation and are supplied through the pair of rectifiers 46 associated with the first motor, the field circuit being completed through a variable resistor 66. The supply voltage for the field windings may be slightly increased to provide a second stage of braking operation. In a modification, Fig. 2 (not shown), each of the series field windings is energised during braking operation through its own rectifier assembly.
Patent GB-692622-A (GB)
Title: Improvements in and relating to fusible electrical cut-out assemblies
Inventor: SUGDEN ERIC WILLIAM
IPC: H01H85/20
Filed: 1950-03-28
Abstract: 692,622. Fuse boxes. PARMITER, HOPE & SUGDEN, Ltd. March 9, 1951 [March 28, 1950], No. 7755/50. Drawings to Specification. Class 38 (i). The subject-matter of this Specification is substantially the same as that described with reference to Figs. 1-4 of Specification 692,621, but the claims differ.
Patent GB-1486426-A (GB)
Title: Technique for frequency detection utilizing switchable filters
IPC: H04Q1/457
Filed: 1974-02-20
Abstract: 1486426 Voice frequency receivers T A HAMILTON 11 Feb 1975 7760/74 Heading H4K [Also in Division G4] A frequency detection device which detects in which of a plurality of frequency bands an input signal occurs comprises a band pass filter 15, scanning means 14 for varying the passband of the filter through the different bands in turn in order to obtain an output signal from the filter when the input signal contains a component in a given band, detecting means 16 responsive to any such output signal to stop the scanning action, and an indicator actuated only when the scanning action is stopped to indicate in which one of the frequency bands the input signal has occurred. Filter 15 is scanned by the sequential earthing of resistors (Fig. 3, not shown) under the control of cycling logic 14 (flip-flops or a counter), detection of a frequency causing a transistor (Q) to disable a gate 13 to block pulses from a clock 11. The device is designed to detect a signal consisting of one out of four high and one out of four low frequencies; when both a high and a low frequency have been received, a decoder 12 produces an output 17 identifying the input frequency combination.
Patent GB-638669-A (GB)
Title: An improved variable density sound recording system
IPC: G11B7/00
Filed: 1947-03-21
Abstract: 638,669. Optical sound recording. WESTERN ELECTRIC CO., Inc. March 21, 1947, No. 7802. Convention date, May 7, 1946. [Class 40 (ii)] In a variable density sound-recording system in which a pair of light beams is projected on to a moving film F, through apertures A and B in a light valve, and a single ribbon speech modulator 7 simultaneously moves one edge of each of the light beams in a direction along the longitudinal axis of the film, the light beams are aligned at the film by refractor plates 15, 16 and one of them is inverted by a prism 17 so that the modulated edges of the beam move in opposite directions at any instant and .effect a cancellation of even harmonics, thus reducing distortion. Two further bias ribbons '11, 12, included to effect noise reduction, move the opposite edges of the beam simultaneously, in the same direction. Specification 479,083 is referred to.
Patent GB-622425-A (GB)
Title: Improvements in or relating to apparatus for use in playing card games
IPC: A63F1/10
Filed: 1947-03-21
Abstract: 622,425. Playing-card holders. MAYER. K. F. March 21, 1947, Nos, 7868 and 10778. [Class 132 (ii)] A receptacle for a pack of cards comprises a trough-shaped member 10 having a base 11, sides 12 outwardly flared and open ends partially closed by resilient flaps 13 retained in place by metal clips 15. The  base 11 is drilled at 16 to form a finger-hole. The flaps may be hinged and spring-urged to the closed position. In a modification (Fig. 3 not shown) the receptacle is rotatably mounted on a base. The receptacle is only slightly larger in length and breadth than a playing card.
Patent GB-844090-A (GB)
Title: Improvements in or relating to variometers or induction regulators
Inventor: BELL JOHN
IPC: H01F29/12
Filed: 1958-03-12
Abstract: 844,090. Inductances. MUIRHEAD & CO. Ltd. Jan. 30, 1959 [March 12, 1958], No. 7917/58. Class 38 (2). A variometer or induction regulator has a multi-toothed two-pole stator 1 (Figs. 1 and 3) with an unwound reference tooth and two sets of windings 3 each set extending over almost 180 degrees of its circumference, the same number of turns being wound in each slot so that the effective number of turns surrounding each tooth progressively increases in each direction. The stator tooth opposite the reference tooth is omitted to accommodate the return conductors of both sets of windings. The rotor has one pole 4a with a small peripheral surface and another pole 4 with a large surface as well as a single phase winding exciting 5. The air gap for pole 4 may be larger than for pole 4a and the air gap length may be varied from one point to another as an adjustment of the accuracy of the linear volt/angle relationship.