baber/WOPTO huggingface dataset:
Patent GB-884313-A (GB)
Title: Improvements in or relating to passive aerials
Inventor: FULLER HUBERT DAVID
IPC: H01Q19/195
Filed: 1959-08-10
Abstract: 884,313. Aerials. GENERAL ELECTRIC CO. Ltd. Aug. 2, 1960 [Aug. 10, 1959], No. 27336/59. Class 40(7). A passive aerial comprises a rigid dielectric element of paper honeycomb and a plurality of mutually spaced conductors carried by the dielectric element. A quarter-wave reflecting plate comprises a honeycomb structure 3 of synthetic resin impregnated paper sandwiched between two fibre-glass skins 1 and 2 to whose front surfaces are fixed respectively parallel conductors 4 (spaced at less than half a wavelength) and a reflecting sheet 5. A second honeycomb structure 6 may be attached to the back of skin 2 to enhance rigidity. A directional aerial system comprises such a plate 12, Fig. 3, capable of axial movement about mutually perpendicular axes 18 and 19, and a horn radiator 14 situated at the focus of a parabolic reflector 16. The reflector 16 comprises metallic strips 17 spaced at less than half a wavelength and situated parallel to the plane of the electric vector of the radiation from the horn so that this is reflected back on to the quarter-wave reflecting plate 12. The conductors 4 on this are situated at 45 degrees 'to the plane of polarization of the radiation so that the wave incident upon the plate is reflected polarized in a plane perpendicular to that of the incident wave. Thus the reflected wave passes through the reflector 16 to produce a parallel plane polarized beam.
Patent GB-773645-A (GB)
Title: Improvements in hacksaws
IPC: B23D51/03
Filed: 1955-09-26
Abstract: 773.645. Saws. INGENIORSFIRMA SVEN FAGRELL AKTIEBOLAG. Sept. 26, 1955 [Sept. 30, 1954], No. 27367/55. Class 61. A hacksaw comprises a U-shaped frame 1, 2, 3 in combination with a storage magazine which houses a coiled continuous flexible sawblade 4 adapted to be withdrawn at intervals, as required, through a feed opening 5 provided in the wall of the magazine case. The magazine is in the form of an annular case 6 and cover 7 detachably connected to bracket plates 8, 9 which are connected by nuts and bolts to opposite sides of one .leg 3 of the hacksaw frame. Handle-forming members 10, 11 also keep the case 6 and cover 7 together. An annular disc 12 is rotatably mounted in the magazine 6, 7 to engage the toothing of the continuous saw blade 4. The opening 5 in the magazine is in alignment with sawblade gripping and tensioning means. One gripping device 13, 15, 17, 18, 19 is mounted on a tension screw 22 rotatably mounted in fixed relation to the frame leg 2 and the other gripping device 14, 16, 17, 18, 19 is rigidly connected to the frame leg 2. Each gripping device comprises an annular sleeve 13 or 14 in which is rotatably mounted a cylindrical body 15 or 16 formed with a slot 17 for the reception of the continuous saw blade 4. Each sleeve 13 or 14 is provided with a peripheral slot 18 through which a headed set screw 19 can be passed to screw into a tapped hole in the body 15 or 16 to clamp the sawblade in the slot 17 and to expand the body 15 or 16 into engagement with its sleeve 13 or 14 to prevent relative rotation of the body and sleeve. The tensioning screw 22 is journalled in the legs 20, 21 of a U-shaped bracket secured to the end of the frame leg 2. The screw 22 is also screw threadedly engaged in a nut formed by an extension 23 of the sleeve 13. The heads of the screws 19, 22 are formed with hexagonal recesses to receive a spanner 24 housed, when not in use, on the bracket plates 8, 9 (Fig. 2).
Patent GB-1275179-A (GB)
Title: The making of thermally-insulating bodies
IPC: F16L59/02
Filed: 1970-06-05
Abstract: 1275179 Thermal insulation SIEMENS AG 5 June 1970 [7 June 1969] 27402/70 Heading F2X [Also in Division F1] The coolant gas fan 1, for a nuclear reactor, is thermally insulated at 7, 8, 9 and 10 with glass or rock wool. The wool filaments are covered with an elastic binder of silicone rubber, diluted with chlorinated hydrocarbons, toluene, xylene, benzene and benzine. The insulation does not form dust particles during use and reduces the risk of contamination of the reactor and the fan motor is protected against large temperature fluctuations.
Patent GB-1193103-A (GB)
Title: Digital to Analog Converter.
IPC: G05D3/14
Filed: 1967-06-14
Abstract: 1,193,103. D-A converters. HOFFMAN ELECTRONICS CORP. 14 June, 1967 [14 June, 1966], No. 27640/67. Heading G4H. In a servo system including first and second comparators 73, 74 (Fig. 1) in which coarse and fine analogue signals (derived from digital signals on inputs 14-22 and 50-54, preferably by weighted resistance networks 11, 12) are compared with coarse and fine feedback signals from mechanical to electrical converters, e.g. potentiometers 95, 96 and 108, the error signals from the comparators are fed to a switch 76 which passes the coarse error signal to control , an electrical to mechanical converter, e.g. motor 86 until the coarse signal drops below a fixed level when the fine signal is fed to the motor. In the embodiment described in which the motor 86 is connected via gearing 91 to fine potentiometers 95, 96 and via further gearing 104 to the coarse potentiometer 108, the shafts 92, 105 controlling the fine and coarse potentiometers are also connected to synchros 93, 106 so that an electrical analogue output is obtained. The switch connecting the comparators 73, 74 to the motor 86 may be controlled by a threshold detector 79 which gives an output on conductor 80 to control gates 76, 77 when the coarse error signal is above a fixed level. Alternatively, a diode network including oppositely poled diodes may be connected to the output of the coarse comparator 74 (Fig. 3, not shown). The potentiometers 95, 96 preferably comprise resistive elements (116, 120, Fig. 2, not shown), arranged substantially in a circle the ends of which form small gaps (117, 121), the gaps being displaced from one another by approximately 180 degrees. A switch comprising two field effect transistors (127, 128) feeds the output from one of the potentiometers to the fine comparator 73 (Fig. 1) under the control of the most significant fine bit (i.e. the bit on input terminal 22).
Patent GB-339008-A (GB)
Title: Improvements in photographic slides for x-ray films
IPC: G03B42/04
Filed: 1929-09-10
Abstract: 339,008. Schall, W. E., and Schall & Son, Ltd. Sept. 10, 1929. R÷ntgen-ray apparatus. - A slide for holding X-ray films or plates during exposure has a base of fibrous material of low heat conductivity impregnated with a resin. In one form, the slide comprises a rectangular frame 1 with a hinged closure member 5 which has a sponge rubber pad 6 on the inner side and a pair of latches 8 adapted to hold the member in the closed position. The base 11 is made of paper impregnated under pressure with resin or artificial resin.
Patent GB-388110-A (GB)
Title: Improvements in protective gear for alternating current electrical machinery
IPC: H02K47/08
Filed: 1931-10-06
Abstract: 388,110. Protective cut-out arrangements. HILL, E. P., 37, Radstock Road, Stretford, Manchester, and ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Crown House, Aldwych, London. Oct. 6, 1931, No. 27778. [Class 38 (v).] Relates to the protection of synchronous machines such as rotary converters 1 and motors against damage to the windings while they are being started up (as asynchronous machines) by the application of an alternating current at low voltage, derived from a tap-changing transformer 3, with the circuit of the D.C. excitation winding 5 closed on itself or through a resistance. According to the invention, a long time-lag protective relay 9, which may be of the induction type, is located in the circuit of the D.C. winding so that, if the starting operation takes an abnormal time, the alternating current which circulates in the winding and attains zero frequency when synchronism is reached, lasts long enough to close the contacts 13 of the relay and trip the main currentbreaker. The invention is shown applied to a synchronous converter, the shunt field winding being connected with the armature winding on the D.C. side through a change-over switch 6, the usual field control resistance 8 and the time-delay relay. The change-over switch enables the polarity of the D.C. side to be reversed if necessary. When synchronism is reached in the normal time, the full voltage is applied by means of the switch 4 and the relay is cut out of circuit by means of the switch 15.
Patent GB-1219410-A (GB)
Title: Radio navigation equipment
Inventor: EARP CHARLES WILLIAM
IPC: G01S13/78
Filed: 1967-06-16
Abstract: 1,219,410. Radar ; radio signalling. STANDARD TELEPHONES & CABLES Ltd. 12 June, 1968 [16 June, 1967], No. 27781/67. Headings H4D and H4L. In an F.M.C.W. secondary radar system a transponder (on another aircraft or on the ground) returns the incoming signal with a frequency-shifted carrier (Fig. 2, not shown), and the F.M. on the output of detector 5 is discriminated to give velocity and/or distance. The frequency-shift at the transponder may be height-coded (Fig. 3, not shown) and the system may be utilized for anti-collision. Timesharing may be adopted to facilitate multistation operation. To avoid synchronous modulation very low-frequency noise modulation may be added. Directional emission may be utilized. The F.M. may be sinusoidal or sawtooth.
Patent GB-1156598-A (GB)
Title: Signal Level Storage Circuit
IPC: G06V30/162
Filed: 1968-06-12
Abstract: 1,156,598. Transistor storage circuits. INTERNATIONAL BUSINESS. MACHINES CORP. 12 June, 1968 [20 June, 1967; 22 June, 1967], No. 27825/68. Heading H3T. A storage device selectively stores either the level of a first signal or alternatively whichever is the greater of the minimum level of the signal or the maximum level of a second signal. The storage arrangement is useful in character recognition apparatus. As shown, the voltage across capacitor 10 follows signal IN1 negatively due to the emitter follower action of 12 and positively due to a positive charging path through resistor 14 and a normally saturated transistor 18. If, however, a control voltage cuts off transistor 18 the capacitor will store the minimum value (i.e. the negative peak value) of the signal unless the value of a second signal IN2 exceeds (positively) this value in which case it charges the maximum (positive) value of this signal.
Patent GB-807321-A (GB)
Title: Improvements relating to worm type elevators for bulk materials
IPC: B65G33/00
Filed: 1956-09-12
Abstract: 807,321. Screw-elevators. SCREW CONVEYER PACIFIC CORPORATION. July 26, 1957 [Sept. 12, 1956], No. 27855/56. Class 78 (1). The diameter of the lower part d of the screw b and its casing c gradually increases downwards and the screw ends in a length of constant and maximum diameter arranged in a cylindrical part of the casing. Material is conveyed to the elevator by a screw a arranged above and to one side of its base. Material passes into the elevator through an aperture f which extends through approximately one quarter of the casing and increases gradually in height. The end of the screw a carries paddles g which throw the material into the screw d.
Patent GB-1510486-A (GB)
Title: Membrane apparatus for the treatment of fluids
IPC: B01D53/22
Filed: 1975-07-02
Abstract: 1510486 Tubular membrane apparatus. Mixing fluids RHONE - POULENC INDUSTRIES 2 July 1975 [4 July 1974] 27895/75 Headings B1C B1L B1M and B1X Membrane apparatus for treatment of fluids comprises an elongate jacket 1 which is flexible over at least part of its length, the length being at least five times the greatest transverse dimension, the jacket being bent about at least one axis transverse to its length, tubular membrane support elements 2 flexible over at least part of their length and extending longitudinally inside the jacket, each element comprising a continuous porous pipeline having at least one longitudinal channel open at least at one end 9 and a permeable membrane 10 covering the pipeline, means 11 connecting the jacket to the support elements in a leakproof manner, a fluid duct 6 connecting the open ends of the support elements to the exterior of the jacket and means for introducing 4 and/or removing 7 a fluid into and/or from the zone within the jacket and outside the membrane. The apparatus can be used for effecting exchange between two fluids or for separating liquid or gaseous mixtures or for mixing fluids, e.g. purification of water by reverse osmosis, gas permeation and dissolution of a gas in a liquid.
Patent GB-1185274-A (GB)
Title: Cyclone Separator
IPC: B04C5/12
Filed: 1968-06-12
Abstract: 1,185,274. Hydocyclones. GRUBBENS & CO. A.B. 12 June, 1968 [13 June, 1967], No. 27913/68. Heading B2P. In a hydrocyclone for separating solid impurities from a liquid &c. and comprising a vertical container having upper and lower portions 1, 2 with an inlet 4 for liquid to be treated arranged tangentially to the portion 1 and an outlet 8, 6 for cleaned liquid, an adjustable valve 5 is provided in the inlet 4 with the valve member extending tangentially to the container, the median plane of the valve member being at an angle of 20-90‹ to the axis of the inlet 4 and parallel to the central axis of the hydrocyclone, the outlet or, as shown, a portion 8 thereof extending perpendicularly to the inlet axis and having its entrance orifice located within the orifice below the opening of the inlet therein. The valve 5 serves to maintain or increase the rotational velocity of the liquid through the whole length of the hydrocyclone to obtain optimum separation effect. It may be automatically adjusted to the rate of liquid supply and it may function as a shut-off valve. The inlet upstream of the valve may be progressively reduced in cross-sectional area towards the valve and may be circular, elliptical or square in crosssection. The valve member may be of the gate type or of the slidable or pivotable disc type and its leading edge may be straight or it may be crescent-shaped or toothed to facilitate the passing of impurities carried by the liquid. A rotor 7 may, as shown, be provided in the outlet portion 6 which may be voluteshaped, the rotor also acting to maintain or increase the rotational velocity of the liquid in the hydrocyclone.
Patent GB-1462213-A (GB)
Title: Hydraulic hinge device particularly for hatch covers
IPC: F16J13/20
Filed: 1974-06-24
Abstract: 1462213 Power operated hinges; operating hatch covers MACGREGOR INTERNATIONAL SA 24 June 1974 [28 June 1973] 27956/74 Headings E2F and E2M  A power operated hinge particularly suitable for operating hatch covers comprises two hinge members 6, 8 pivotally connected at 7, an intermediate member 9 also pivoted at 7, and two double acting hydraulic piston and cylinder power units 11, 12, 15, 6 each connected pivotally between a hinge member and the intermediate member and being connected to be actuated in sequence to open or close the hinge. In the embodiment shown one section 3' of a hatch cover 3 is connected to member 6 while member 8 is secured to a ships deck-opening of the hatch cover from the closed position in Fig. 1 is effected by first extending piston and cylinder unit 11, 12, then extending unit 15, 16. Two stops 18, 19 engage the hinge in its closed and opened positions. As shown on the right hand side of Fig. 4 a ramp 22 is provided which is engaged by a roller 21 near the fully open position to raise the hatch cover away from the hatch edge.
Patent GB-1156792-A (GB)
Title: Treatment of Fibres for Paper Making.
Inventor: LEWIS GEORGE WILLIAM
IPC: D21C9/00
Filed: 1965-07-02
Abstract: 1,156,792. Paper. COURTAULDS Ltd. 4 July, 1965 [2 July, 1965], No. 28065/65. Heading D2B. Paper is made from an aqueous dispersion of regenerated cellulose staple fibres containing a synthetic resin cured in the fibres. A tow of regenerated cellulose fibres may be impregnated with a synthetic resin precursor or partially cured synthetic resin, and then dried and the resin cured, the fibres being cut to staple length before or after the drying and curing, or staple fibres may be impregnated, dried and cured. In either case the treated staple fibres are dispersed in water and the dispersion laid and dewatered. In the example, a tow of regenerated cellulose is padded with a solution of urea-formaldehyde precondensate and zinc nitrate in water, dried at 95‹C and cured at 140‹C. The tow is then cut to #-inch staple, dispersed in water and made into paper. Other synthetic resins that may be used are phenol - formaldehyde and melamine - formaldehyde.
Patent GB-799461-A (GB)
Title: Arrangements for locating defective regenerative repeaters in electric pulse systemsemploying pulses of constant amplitude
Inventor: RALPH FRANK
IPC: H04B17/40
Filed: 1956-09-14
Abstract: 799,461. Supervising unattended repeaters. STANDARD TELEPHONES & CABLES, Ltd. Sept. 14, 1956, No. 28142/56. Class 40 (4). [Also in Group XL (c)] In order to locate a defective repeater in a two-way pulse code signalling system employing a chain of unattended regenerative repeater stations linked by cables, or, it is stated, by a radio or a long-distance waveguide system, the " go " and " return " paths are joined at each repeater by an impedance and test pulses are transmitted along the " go " path and timed on their return along the " return '' path. The " go " and " return paths, Fig. 2, consist of cables 13, 14, 24, 25, &c. with intermediate repeater stations, each consisting of a regenerative repeater for each path, i.e. 16, 17, 20, 21, etc.; one terminal transmitter 9 and receiver 10 are also shown. It is necessary for the testing procedure that the repeaters shall discriminate against small amplitude signals in the presence of signals of larger amplitude, hence each repeater, Fig. 1 (not shown), includes a trigger circuit for regenerating the pulse signals, the triggering level being automatically varied by a bias depending upon the level of the incoming signal in an undisclosed manner. In order to test the system from the terminal shown, the output of repeater 16 is connected to the input of repeater 17 by a network 31, repeaters 20, 21 are connected by a network 33 and so forth. Each network, which is in the form of a resistance or resistance/ capacity attenuator, Figs. 3 and 5 (not shown), provides an attenuation 10 dB. greater than the attenuation introduced by the section of " return path immediately preceding the repeater station to which the network belongs, e.g. network 31 has a greater attenuation than cable 25. Test pulses from a generator 37 are applied to the " go " path and received back at 38 and displayed so that the time delay may be observed. Assuming repeater 22 to be defective, the signal passed by network 33, regenerated at repeater 21, will provide a larger input to repeater 17 than will network 31 since network 31 has a greater attentuation than cable 25. Hence repeater 17 will regenerate only the larger input from network 33 and this will be indicated at 38. For testing from the opposite terminal, networks 32, 34, &c. are provided. These do not affect the test from the first terminal as the repeaters discriminate against their low amplitude signals. All the networks may either be permanently connected, Fig. 3 (not shown), or, Fig. 5 (not shown), be connected only during testing. This is achieved by including a rectifier in the network and blocking the rectifier by holding the " return " cable at a higher potential than the " go " cable; reversing this arrangement when required.
Patent GB-1068066-A (GB)
Title: Improvements in the rearing of piglets
IPC: A01K1/035
Filed: 1964-07-08
Abstract: 1,068,066. Rearing piglets; feeding appliances. BIEHL & CO. July 8, 1964 [Oct. 31, 1963], No. 28143/64. Addition to 1,054,821. Heading A1M. In the rearing apparatus claimed in Specification 1,054,821 the food supply means comprises a pipe 2 which extends through the cages 1 and is provided, within the region in each cage, with an opening 3 through which a piglet in the cage may take feed from the pipe. The pipe 2 is movable longitudinally to bring the openings 3 under covers 6 secured to the cage floors. The pipe is filled with liquid feed through opening 7 and the ends of the pipe are closed by removable plugs 5.
Patent GB-495274-A (GB)
Title: Improvements in or relating to the manufacture of complex metallic compounds
Filed: 1937-10-15
Abstract: Complex copper-containing compounds are obtained by reacting a soluble sulphate, chloride, or nitrate of zinc, cupric copper, mercury, or nickel with ammonia in aqueous solution to form a suspension of the metallic salt in chemical combination with ammonia and treating the suspension with oxygen-containing gases in the presence of metallic copper.  The gases disengage ammonia from the suspended salt, cupric hydroxide is formed from the metallic copper, and is precipitated in combination with the metallic salt present. The reaction may be facilitated by having present a small quantity of a halogen, for instance a solution of iodine, and be effected at temperatures of 15-35 DEG  C.  A solution of the salt originally used may be added as the reaction proceeds when products not too rich in copper are desired.  The complex compounds formed may be used as a combined insecticide and fungicide, or for preparing solutions for use in the plating and artificial silk industries.ALSO:A combined fungicide and insecticide is obtained by reacting a soluble sulphate, chloride, or nitrate of zinc, cupric copper, mercury, or nickel with ammonia in aqueous solution to form a suspension of the metallic salt in chemical combination with ammonia and treating the suspension with oxygen-containing gases in the presence of metallic copper.  The gases disengage ammonia from the suspended salt, cupric hydroxide is formed from the metallic copper, and is precipitated in combination with the metallic salt present.  The reaction may be facilitated by having present a small quantity of a halogen, for instance a solution of iodine, and be effected at temperatures of 15-35 DEG  C.  A solution of the salt originally used may be added as the reaction proceeds when products not too rich in copper are desired.
Patent GB-944314-A (GB)
Title: Macroporous filtering element of plastic material
IPC: B29C65/02
Filed: 1961-08-04
Abstract: 944,314. Moulding filters. SOC. LE CARBONE LORRAINE. Aug. 4, 1961 [Aug. 18, 1960; July 25, 1961], No. 28429/61. Heading B5A. [Also in Division B1] A plane sheet of macroporous plastic material, e.g. polytetrafluoroethylene, is shaped to impart to it the configuration of Fig. 1, having channels 1a and strips 3a. Two such preformed sheets are placed face to face and their ends are inserted into perforate plates 2, Fig. 2, the assembly being then introduced into a mould 5, 6, Figs. 4 and 5, where heat (e.g. 380‹ C.) and pressure (e.g. 150 kg./sq. cm.) are applied. The ends of the tubes 1, Fig. 13, formed by the juxtaposition of channels 1a, are welded in the plates 2, and the strips 3a are welded in pairs to form tabs 3 by this process. Thin sheets of plastic cement may be introduced between melting surfaces prior to welding. Fluid-tight rigid reinforcing zones 12a, Fig. 13, may be produced, by fritting, in the plane sheets before shaping.