baber/WOPTO huggingface dataset:
Patent GB-1325414-A (GB)
Title: Circuit for delaying information in the form of analogue signals
IPC: G11C27/04
Filed: 1972-03-24
Abstract: 1325414 Active delay circuits; sonar and direction-finding systems FRIED KRUPP GmbH 24 March 1972 [25 March 1971] 13891/72 Headings H3U and H4D In an analogue delay circuit, signals to be delayed are connected to a first path comprising a threshold circuit 2 and a shift register 4 and a second path comprising an amplitude detector 7, the outputs from the shift register and detector being multiplied at 8 and then fed to an output filter 9. Sinusoidal input signals at 1 are converted to a rectangular waveform by threshold circuit 2, and corresponding delayed rectangular signals may be obtained from the outputs of one or more of the stages of shift register 4, the signal being stepped through the register by a clock signal on 5 whose frequency determines the delay per stage of the register. An output of the required delay is applied to one input of a multiplier 8 which may be a simple FET switch, Fig. 4b (not shown). The input at 1 is also fed to a conventional diode peak or mean level detector 7, the output from which is a D.C. whose level depends on that of the input at 1. The result of multiplying this signal with the shift register output is a delayed rectangular wave signal whose amplitude corresponds to that of the input signal, which is subsequently passed through a low-pass or band-pass filter 9 to reconvert it to sinusoidal form. The delay may be employed in a direction finding system, in which transducers for electromagnetic or acoustic waves are arranged in a circular or linear array, Figs. 5a, 7a, 7b (not shown). In one embodiment, Fig. 5b, the output from each transducer of a circular array W1... W8 is fed to a respective delay arrangement, each of which includes a number of multipliers 8W which receive inputs from different tapping points on the associated shift register 4W. The phase-shifted signals from each transducer thus obtained are appropriately combined in units 15 to provide a number of outputs 16a1 ... 16am each of which corresponds to a particular bearing from the array. The system may be switched from a receiving to a transmitting mode of operation by a suitable switching arrangement, Fig. 6 (not shown), which connects the transducers to the outputs instead of the inputs. In a modified arrangement, Fig. 7c (not shown), only one multiplier 8W is associated with each delay, and the output from each stage of the delay is fed to it in turn via a cyclic switching circuit (18). In a further modification, Fig. 9 (not shown) for a linear transducer array, each shift register 4W has a single output which is fed to its associated multiplier 8W, and the outputs of the multiplier are fed to a single combining circuit (15). The relative delays from each delay arrangement are varied by controlling the relative clock frequency generated by multiple clock generator 20. Switching from receive to transmit mode may be again provided, Fig. 10 (not shown).
Patent GB-700935-A (GB)
Title: Improvements in or relating to microphones
IPC: H04R1/40
Filed: 1951-06-12
Abstract: 700,935. Sound reproducing circuits. SIEMENS & HALSKE AKT.-GES. June 12, 1951 [June 12,1950], No. 13939/51. Class 40 (4) A directional microphone system comprises at least three microphones arranged in a straight line and connected to a single output circuit, the length of the line being not greater than half the wavelength of a medium frequency of the audio-frequency band, that is a frequency of the order of 800-1,000 cycles per second. Such a system exhibits a directional characteristic for the higher frequencies. The microphones are preferably screened by a hood of sound-permeable wire-netting. In a modification, two such lines are mounted parallel to one another and their outputs are connected in opposition so that the whole system acts as a pressure gradient transducer. Fig. 3 in which each line is represented by a condenser microphone 12, 13 illustrates the circuitry, elements 14, 17 and 19 being resistors. A low-pass filter 20 renders the line 13 ineffective at the frequencies at which the line 12 is directional.
Patent GB-1483350-A (GB)
Title: Heat-recoverable moulded products
IPC: B29D1/00
Filed: 1974-03-29
Abstract: 1483350 Moulding heat-recoverable products COAL INDUSTRY (PATENTS) Ltd 21 March 1975 [29 March 1974] 14040/74 Heading B5A A heat-recoverable product of plasticized polyvinyl chloride is made by first forming a desired hollow moulding, e.g. injection, transferextrusion or dip-moulding then the moulding at 130‹ to 200‹ C. is subjected to expansion or contraction on a mandrel and the diemensionally altered moulding is then rapidly cooled while still in contact with the mandrel. -
Patent GB-845617-A (GB)
Title: Improvements in or relating to sodium vapour electric discharge lamps
Inventor: HEANLY MICHAEL ANTHONY CHADWIC
IPC: H01J61/74
Filed: 1958-05-02
Abstract: 845,617. Electric discharge tubes. GENERAL ELECTRIC CO. Ltd. May 1, 1959 [May 2, 1958], No. 14065/59. Drawings to Specification. Class 39(1). A sodium vapour electric discharge lamp of the positive column type comprises two gas filled similar U-shaped discharge tubes mounted side-by-side in a common outer jacket (which may be double-walled) and the inner surface of the jacket is sealed after the jacket has been evacuated. The U-tubes are mounted closely adjacent to one another with the axes of their limbs parallel and located at the corners of a rectangle located in the plane perpendicular to the axes. The spacing between adjacent limbs of the two discharge tubes is preferably less than or equal to the spacing between the limbs of the individual tubes. The discharge tubes are preferably supported by a pair of flexible discs located at each end of the jacket and provided with holes through which project various parts of the discharge tubes; the disc fits closely against the inner surface of the jacket and the holes in the disc are so shaped that they grip the respective regions of the tubes and thereby resiliently support them. The gas filling may be of neon containing 0À8% argon at a total pressure of 10 mms., and the U-tubes have an internal coating of sodium resistant glass. The jacket or U-tubes may be provided with closely fitting heat insulating sleeves. One end of the jacket is domed and the other is sealed into a mounting in a conventional manner and leads pass through it. The space between the inner jacket wall and the U-tubes is provided with gettering means, and the lamp may be mounted in a holder which is fitted with reflectors.
Patent GB-1321198-A (GB)
Title: Spring brake actuator
IPC: F16D65/56
Filed: 1971-05-10
Abstract: 1321198 Fluid pressure brake actuators BENDIX CORP 10 May 1971 [18 May 1970] 14067/71 Addition to 1276071 Headings F2E and F2F In an improvement in or modification of the spring applied, fluid pressure released disc brake arrangement of Specification 1,276,071 having a first piston 38 for applying the brakes by fluid pressure and urged in a brake applying direction by resilient means in the form of washers 80 and a second piston 44 for releasing the brakes by means of fluid pressure the spring washers 80 may be compressed to release the brakes manually in the absence of fluid pressure by turning a bolt 72 to urge a cylinder 89 in a direction to compress the washers which are engaged by a lip 96.
Patent GB-1149837-A (GB)
Title: A boiling heavy water indirect-cycle reactor
Inventor: FAJEAU MAURICE
IPC: G21C1/08
Filed: 1968-03-22
Abstract: 1,149,837. Cooling reactors. COMMISSARIAT A L'ENERGIE ATOMIQUE. 22 March, 1968 [25 April, 1967], No. 14077/68. Heading G6C. In a boiling heavy water reactor the pressure vessel 10 encloses the heat exchanger 20 and the callandria tank 12 which is traversed by the fuel containing pressure tubes 13<SP>1</SP>. The water is circulated upwards, by convection, through the pressure tubes. Two separate flow streams are maintained, one downwards through the heat exchanger duct 18, passage 22, upwards through the inner peripheral region 30 of 12, downwards over screen 26 through holes 38 and upwards through tubes 13<SP>1</SP> in which steam is generated. The second flow takes place round 12, downwards between exchanger 18 and the vessel wall 10 to enter the lower ends of tubes 13. To start the reactor, the water level is raised to 46 by the injection of gas into 12 by the pump 42. Control rods bring the reactor to criticallity. The moderator water temperature is maintained at a relatively low value.
Patent GB-1255691-A (GB)
Title: Induction meter having light-load adjuster
IPC: G01R11/36
Filed: 1969-03-18
Abstract: 1,255,691. Induction meters. WESTING- HOUSE ELECTRIC CORP. March 18, 1969 [March 28, 1968], No. 14100/69. Heading G1Q. A light-load adjuster for an induction meter comprises a movable pair of arms 67, 69 of magnetic material which intercept the fluxes passing through the polefaces 13A, 15A, Fig.2, of two poles 13, 15, Fig.1, of the voltage core 2. The arms 67, 69 resiliently engage the polefaces 13A, 15A and form integral parts of a lever 71 of magnetic material pivoted (at 73) on a bracket 75 of non-magnetic material which in turn is riveted to the sides of the two poles 13, 15. The lever 71 is rotated by a screw-nut arrangement 78-81 to move the arms across their respective polefaces. The flange 75B of the bracket 75 also serves to space a magnetic shunt 83 from the outer poles 13, 15 of the voltage magnetic circuit, the shunt being spaced from the centre pole 11 by a headed stud 84 of brass or aluminium. A further shunt 29 is riveted to the other side of the outer poles 13, 15 and spaced from the centre pole 11 by a conductive tube 37. A magnetic screw 33 passes through this tube into an opening 35 in the centre pole 11, its penetration into this opening determining the effective load provided by conductive tube 37 on the voltage coil 5, and hence the phase angle between the voltage and current fluxes. Temperature compensation is provided by a sleeve 39 of an austenitic iron-nickel alloy having a negative temperature coefficient of permeability which also surrounds the screw. To compensate for variations in the supply voltage, a magnetic tongue 61 extends downwards in Fig. 1 from the strip 29 and has a portion extending underneath the disc 23 to face the pole 11. The cross-section of the tongue is reduced by a hole 65 so that it becomes saturated when the full rated volatge is applied to the coil 5 but is unsaturated at lower voltages. The meter may be used in a single or polyphase circuit for indicating or integrating watts or reactive volt-amperes.
Patent GB-1215404-A (GB)
Title: Improvements in or relating to refractory alloys containing a dispersed phase of thoria and in processes for their production
Inventor: MARTY M E L
IPC: B22F3/10
Filed: 1968-03-22
Abstract: 1,215,404. Process of forming sintered dispersed ThO 2  containing alloys. OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES. March 22, 1968 [March 24, 1967], No.14102/68. Heading C7D. In a process of producing sintered alloys based on Ni and/or Co and/or Fe and containing Cr, preferably 5-30% by weight and dispersed ThO 2  preferably 1-10% by weight, the powders are mixed, compacted and then sintered above 700‹ C. in an enclosure containing a hydrogen atmosphere powdered Cr and a halide, other than a fluoride, which reacts to form gaseous chromium halide which diffuses Cr into the compact. The ThO 2  powder used is preferably formed by the pyrolysis of thorium acetylacetonate at 550‹ -900‹ C which gives ThO 2  with a maximum particle size of 0À1 micron. The gaseous chromous halide preferably the chloride or bromide is formed by reaction of the Cr with NH 4  Cl, NH 4  Br, Br or Br-Cl or I-Cl. Preferably Cr granules are first reacted with the halogen in H 2  to form granules with a core of Cr and a coating of Cr halide. These granules are then used in the sintering container to supply the Cr halide vapour. The powder mixture may also contain W, Mo, Nb, Ta, Ti, Zr, A1 and the sintered product may be hot rolled and then cold rolled.
Patent GB-1269341-A (GB)
Title: Encapsulated microcircuit device
IPC: H01L21/316
Filed: 1969-03-18
Abstract: 1,269,341. Semi-conductor devices. WESTINGHOUSE ELECTRIC CORP. 18 March, 1969 [21 March, 1968], No. 14105/69. Heading H1K. A semi-conductor device comprising a wafer of semi-conductor material having a contact pattern surrounded by a layer of alumina is provided with at least one film of silica glass doped with an oxide of at least one of the elements boron, arsenic and phosphorus. In a first embodiment, Fig. 1 (not shown), an integrated circuit having a surface layer of Al 2 O 3  over which extend conductors is encapsulated by a glass layer through which are formed windows to expose areas of the conductors. In a second embodiment, Fig. 2 (not shown), a silicon dioxide layer is covered with a layer of alumina over which first level connections are formed. A glass layer is deposited, windows are formed, and second level connections are formed, which are themselves covered with a glass layer.  The glass layer may be produced by thermal decomposition of tetraethoxysilane, Si(OC 2 H 5 ) 4 , in an oxygen atmosphere to deposit silicon dioxide, a hydride of boron, arsenic, or phosphorus diluted with nitrogen being added to incorporate a small amount of the corresponding oxide into the glass layer to control the coefficient of expansion. The metal conductors may be of aluminium or chromium-gold alloy.
Patent GB-940467-A (GB)
Title: Improved method and apparatus for extruding hollow bodies
IPC: B21C23/20
Filed: 1962-04-12
Abstract: 940,467. Extruding. O. F. A. BIGINELLI. April 12, 1962, No. 14166/62. Heading B3P. A cup-shaped body with thick side walls 1 and a thin end wall 12 is made by backwardly extruding a billet in a die 2 having a conical recess. The latter causes the side walls to be detached from the wall of the recess during the final stage of extrusion whereby the body is withdrawn by the ram 3 and is subsequently stripped therefrom by a sleeve 4 which can be moved relatively to ram by hydraulic fluid admitted through ports 8, 9. Alternatively the sleeve may be operated mechanically. The sleeve also centres the ram 3 within the die during extrusion. The die has a replaceable bottom 21. A plate 7 limits the stroke of the ram and thus determines the thickness of the end wall 12.
Patent GB-786560-A (GB)
Title: Improvements in or relating to automatic tuning control arrangements
Inventor: TATE CLIFFORD EDWARD
IPC: H03J7/16
Filed: 1954-05-14
Abstract: 786,560. Automatic tuning control systems. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. April 22, 1955 [May 14, 1954], No. 14215/54. Class 38 (4). A motor continuously tuning to resonance one or more tuned circuits to be controlled is stopped only when conjointly (1) a discriminator output is nearly zero and (2) a certain output from the controlled circuit is exceeded. As shown, a motor 5 through a magnetic clutch 6 continuously drives variable condensers 2, 3, 4 in tuned anode stages of a transmitter energized from an oscillator 1 and outputs from the final and first stages are compared in a phase discriminator 20, 14, 15 whose D.C. output in sense and magnitude indicates the departure of the anode stages from resonance. Further, the oscillator output may be chopped or modulated from an audio frequency source 21 so that, after amplification at this frequency has taken place in a valve 22, the polarity of the discriminator output is detected in a gated phase-sensitive rectifier 23 to the cathode of which a reference voltage is applied from the A.F. source 21. This output, of operative value only during a restricted tuning range between C and F (Fig. 2), but not during the part D, E of the discriminator characteristic, operates a relay B to close a series contact B1 in the clutch operating circuit and open a contact B2 in a circuit B2, A2 across the input across the valve 22. This prevents the motor drive ceasing and discriminator output being short-circuited when, on the tuning frequency range G, G being reached, a second relay A is energized by the rectified output of a coil 11 coupled to the last tuned anode circuit, so that contact A1 in parallel with B1 opens and contact A2 in series with B2 closes. Finally, on the tuning frequency range D, E being reached relay B is de-energized to again open contact B1 and close contact B2. As a result the clutch 6 is opened to stop the tuning adjustment and the discriminator output to valve 22 short-circuited. The short-circuiting contacts B2, A2 may be omitted if modulator 21 is not employed. A common adjustable bias resistor 26 of valves 22, 24 permits variation of the frequency difference between points G, G and of the slope, i.e. sensitivity, of the discriminator part D, E.
Patent GB-780823-A (GB)
Title: Improvements relating to the deposition of dry fibres to produce fibrous structures
IPC: D04H1/732
Filed: 1955-05-17
Abstract: 780,823. Forming fibre webs. CLARK, J. D'A. May 17, 1955, No. 14259/,55. Class 120(1) Relates to apparatus of the kind described in Specificat ion 668,216 in which fibres .are circulated in a fibre - depositing head 10 and showered through a foraminous wall 15 of the head, while entrained in an air stream, on to a second formainous wall 17. The rotary paddles of the earlier Specification are replaced by nozzles 23 directing a high-velocity air stream into head 10 in such a manner as to entrain the fibres in a circulating layer of air moving over wall 15. Air is withdrawn through a duct 19 from beneath wall 17, which is in the form of an endless screen so that the fibres collect in web form thereon; preferably, the amount of air drawn through screen 17 is slightly larger than the amount passing through wall 15 so as to cause a slight inflow of surrounding air into the space between wall 15 and screen 17. The openings in wall 15 may be in the form of a single slot etending across the wall, or a purality of slots, or they may form a screen or the like. Additional air jets, such as 24 may be provided directed radially, or at an angle between tangential and radial, into head 24 to induce turbulence in the air flow in the head so as to break up lumps of fibres; these jets may operate intermittently or may be oscillated across the head to prevent fibre accumulation on the surfaces of the head. A cleaning jet may also be directed against the outside of the foraminous wall 15.
Patent GB-1470211-A (GB)
Title: Semiconductor devices
IPC: H01L23/535
Filed: 1974-04-01
Abstract: 1470211 Semi-conductor devices FAIRCHILD CAMERA & INSTRUMENT CORP 1 April 1974 [7 May 1973] 14326/74 Heading H1K A lateral bipolar transistor includes a graded base region 58 between respective emitter and collector regions 59, 521/522, all within an area of a semi-conductor body which is laterally isolated by inset insulation 55a, 55b, 541, contact to the base region 58 being established via a conducting channel 53 extending beneath the insulation 541 and emerging in a surface zone 581 spaced from the active regions of the transistor by the insulation 541. In the embodiment shown in Fig. 2 the channel 53 is a buried layer between substrate 51 and epitaxial layer 52. The base region 58 may be formed by ion implantation or diffusion, preferably using the same masking aperture as that used subsequently to form the emitter region 59. An integrated array of such transistors is described. Fig. 4 shows an integrated structure including a PNP transistor as in Fig. 2 but with an additional N<SP>+</SP> region 92 constituting the emitter of an NPN transistor, of which P type region 521/91 constitutes the base region and N type region 58 the collector region.
Patent GB-1575368-A (GB)
Title: Tracks for endless track vehicles
IPC: B62D55/21
Filed: 1977-04-05
Abstract: In a connection between an end connector (301) and bolts (304) of two track elements of a track, the ends of the bolts are clamped tight in recesses (303) of the end connector. The ends of the bolts or the recesses (303) are provided with a plurality of grooves (312). If a clamping force is applied to the end connector perpendicular to the contact faces, residual lubricant and/or other foreign particles are squeezed out of the contact faces and into the grooves. As a result, it is possible to keep the coefficient of friction between the contact faces reproducible and high so that the size of the clamping force at which slipping begins to occur can be defined exactly. In this way, a reliable protection against uncontrolled axial slipping of the bolts (304) with respect to the end connectors (301) is realised. <IMAGE>
Patent GB-316709-A (GB)
Title: Improvements in actions for automatic pianofortes
IPC: G10F1/02
Filed: 1928-05-16
Abstract: 316,709. Taliani, T. May 16, 1928. Actions, pneumatic; tune-sheets.-The force of the hammer blows in a player piano is regulated individually by the size and shape of the perforations in the tune-sheet. The tracker ducts are connected by flexible tubes S to the interior of a chamber with flexible walls H connected by rods L to spring-mounted plates M, N carried by a striker slidably mounted between two continuously rotating rollers A, B. The chamber is also connected through bleed-holes Y and a flexible or slidable tube T to a suction chest, so that the pressure between the plates and the rollers depends on the width of the perforations.
Patent GB-354723-A (GB)
Title: Improved feed mechanism for drilling and similar machines
IPC: B23B47/18
Filed: 1930-05-10
Abstract: 354,723. Drilling. ADCOCK, G. and SHIPLEY, H., (trading as ADCOCK & SHIPLEY), Rex Machine Tool Works, Bright Street, Leicester. May 10, 1930, No. 14423. [Class 83 (iii).] Feed mechanism for drilling and similar machines of the kind wherein the feed is commenced by the coupling of a clutch, the working operation being performed within one complete rotation of a trip means which acts in conjunction with a weight, spring, or other means to return the tool to the normal position, is characterized by a device that automatically reclutches the clutch on the return of the tool to the normal position. The invention is particularly applicable to the apparatus described in Specification 287,304. As shown a main axle a<2> has a pinion a gearing with a rack on the feed sleeve of the spindle of a drilling machine. The pinion a is rotated upon engagement of clutch members d<3>, e<2> by a worm d and worm wheel d<2>. The clutch member e<2> is connected to a spring-actuated plunger e<4> within the axle a<2>. The axle a<2> may be rotated manually by a lever e slidable transversely of the axle a<2> within limits defined by stops h and having a groove e<5> which coacts with a ball or roller g in the end of the plunger e<4>. Displacement of the lever e to remove the ball g from the groove e<5> energizes the clutch parts d<3>, e2, and the pinion a is rotated. After the members a, e have moved a part of a revolution and the tool has performed its work an adjustable stop h<2> engages a conical face h<3> on the lever e and the latter is moved to register the ball g and groove e<5> and de-energize the clutch d<3>, e<2>. The tool is then returned to its initial position by the action of a spring f upon the axle a<2>. The end l<2> of the lever e thereupon engages a spring-pressed plunger i<2> and is moved to re-energize the clutch d<3>, e<2>, and the working tool again descends. A leaf spring m engageable with a conical face n on the lever e may be used instead of the plunger i<2>. Means may be utilized for holding the plunger i<2> out of action so that the apparatus may be used as described in Specification 287,304, [Class 83 (iii), Metals, Cutting].