baber/WOPTO huggingface dataset:
Patent GB-1278089-A (GB)
Title: Improvements in or relating to electromagnetic holding devices
IPC: H01F7/08
Filed: 1969-10-03
Abstract: 1278089 Magnetic switch details SOC D APPAREILLAGE ELECTRIQUE SAPAREL 3 Oct 1969 [6 Jan 1969] 48633/69 Heading H1N An electromagnetic holding device with a spring-biased armature releasable to trip a circuit-breaker has a U-shaped yoke 1 with a release coil 4 on one limb 3 and a permanent magnet 5 adjacent the second limb 2 on the free end of which the armature is rockable on two relatively narrow spaced projections 11 which are between spaced rounded projections 8 of a non-magnetic member 6 which fits over the limb 2 and above the permanent magnet 5. The end of the first limb 3 has a relatively narrow tooth 22 for engagement by the armature in its attracted position and a flux collector 41, 43 is mounted on the member 6 to convey flux from the permanent magnet to the armature. A flux diverting regulating screw 25 is threaded into the yoke 1 and is engaged by an edge 26 of the thermoplastic coil former to restrain the screw in a set position. The surface of the armature which rocks on the yoke may be highly polished and the co-operating yoke parts may be given a matt finish by cold hammering. The base of the yoke 1 is cut away at 21 to increase its reluctance and it is provided with bosses 18 on which the permanent magnet 5 rests. The flux collector 41, 43 may be made of a material such that the effects of temperature change or its reluctance compensates for the effect of temperature change on the other components.
Patent GB-1179697-A (GB)
Title: Improvements in or relating to Electrically Powered Model Vehicles
Inventor: SARGEANT ARCHIBALD
IPC: A63G25/00
Filed: 1966-10-31
Abstract: 1,179,697. Model vehicle system. ROSEMOUNT ENG. CO. Ltd. 10 Oct., 1967 [31 Oct., 1966], No. 48646/66. Heading A6S. [Also in Division H2] An electrically powered model vehicle system comprises a lower conductive member forming a base over which vehicles can move, an upper conductive member arranged above the first member and substantially parallel thereto and two vehicles, each having brushes making contact with the upper and lower conductive members to pick-up power therefrom, supply means for supplying controllable electric potentials of alternately opposite polarity between said conductive members, rectifying means on each vehicle for giving an output on one vehicle from the component of applied potential of one polarity and for giving an output on the other vehicle from the component of the other polarity, a steering mechanism on each vehicle controlled in accordance with the amplitude of the rectified component, and a driving motor for each vehicle energised by electrical power picked up by said brushes. The motor may be driven by the rectified component or by the unrectified a.c. supply, and runs at constant speed over a range of voltages used for the steering mechanism. The steering mechanism comprises steerable wheels biased in one direction by a spring and moved against this bias by magnetic means responsive to the amplitude of the rectified signal as described in Specification 1,151,564. A brake, normally held off by electromagnetic means, can lock the steering wheels in the event of a current failure. The upper conductive member is preferably a conductive mesh to enable the vehicles to be more readily observed.
Patent GB-1321769-A (GB)
Title: Electrophotographic recording element
IPC: C23C14/00
Filed: 1971-10-21
Abstract: 1321769 Sputtering apparatus RCA CORPORATION 21 Oct 1971 [4 Dec 1970] 48931/71 Heading C7F [Also in Division H1] A sputtering apparatus comprises a cathode 56 which is insulated from base plate 34 by bush 52. A grounded shield 60 surrounds the cathode. A plate 58 of aluminium, copper or brass is attached to the cathode 56 and on the plate is mounted a target 74 of Zn or Ti. A grounded anode 62 has a transparent substrate 18 having a conductive layer 16 mounted thereon. Instead of reactive sputtering using a mixture of O 2  + Ar, non-reactive sputtering may be used where ZnO, TiO 2 , CdS, CdSe and ZnS are the materials sputtered. The transparent substrate may be glass, quartz or polyethylene terephthalate whilst the conductive layer may be Al, Cr or an oxide of In or Sn. Alternatively the substrate 18 and conductive layer 16 may be replaced by an opaque sheet of Al, Cr or stainless steel.
Patent GB-1208019-A (GB)
Title: Bits and nozzles for use in hydraulic drilling
IPC: E21B10/60
Filed: 1967-10-31
Abstract: 1,208,019. Jetting drill bits. GULF RESEARCH & DEVELOPMENT CO. 31 Oct., 1967 [3 Nov., 1966], No. 49310/67 Heading E1F. The life of an earth-boring drill bit jetting nozzle, which allows of the emergence of a high velocity jet of liquid and abrasive particles from the bit, is prolonged by the appropriate shaping of the flow passage through the nozzle. The entry surface of the passage is defined by the rotation about the axis of the passage of an arc of a circle of a radius R of between 12.7 to 444.5 cms., this entry surface merging tangentially with the cylindrical bore of the exit portion T of the nozzle of which the exit bore is smaller than the inlet bore. Reference has been directed by the Comptroller to Specifications 1,136,739 and 1,136,740
Patent GB-1324538-A (GB)
Title: Intensifying screens
IPC: C08K3/00
Filed: 1970-10-20
Abstract: 1324538 Uses of luminescence EASTMAN KODAK CO 20 Oct 1970 [21 Oct 1969 (2)] 49724/70 Heading C4S [Also in Divisions C3 and H5] A fluorescent screen comprises a support bearing a layer comprising an inorganic metal ion containing phosphor and as a binder either (a) a polycarbonate or (b) a mixture of a polycarbonate and an elastomer block copolymer comprising recurring carbonate units copolymerized with blocks composed of recurring units of the formula in which R is an alkylene group and x is an integer such that the molecular weight of -(O-R)xis 100 to 10,000. Many phosphors and supports are given, lead activated barium sulphate and polyethylene terephthalate being used in the detailed examples. The binder used in the examples is a polycarbonate derived from bisphenol A and a mixture of such a polycarbonate with a bisphenol A-polytetra-methyleneglycol block copolymer. The fluorescent, intensifying screen may be used in combination with one or more radiographic image-forming sensitive silver halide emulsion layers. Excitation by X-rays, violet and U.V. light is instanced. The inorganic phosphor may be a salt of a Group II heavy metal, calcium tungstate, barium lead sulphate, zinc sulphide, zinc cadmium sulphide and zinc orthosilicate being instanced. Emission of barium lead sulphate may be converted to longer wavelengths by various inorganic and/or organic substances, e.g. terphenyl and 1,4-bis- [2 - (5 - phenyloxazolyl)]benzene; 1,1,4,4- tetraphenyl butadiene and 1,4-bis-[2-(5-phenyloxazolyl)]benzene, or zinc sulphide. Additives to the silver halide layer are exemplified for specified functions. Intermediate and overcoat layers are discussed and details such as concentrations, viscosities, phosphor densities and screen preparations given. Rare earth phosphors are discussed, such as those including La, Ce, Sm and Gd. Other phosphors include lead sulphate, lanthanide- or lead-activated barium sulphate, europium activated barium strontium sulphate, lead activated barium silicates, Gd activated yttrium oxide, lanthanide- or lead-activated strontium sulphate, barium fluoride, barium fluoro-chloride, particle sizes and distributed densities being given.
Patent GB-1184820-A (GB)
Title: Improvements in Card Reading Apparatus
Inventor: KEESING ROBERT
IPC: G06K7/10
Filed: 1967-11-02
Abstract: 1,184,820. Sensing records. INTERNATIONAL COMPUTERS Ltd. 31 Oct., 1968 [2 Nov., 1967], No. 49773/67. Heading G4M. A card or tape 16 is fed between contrarotating members including a core 3 carrying discs 5, and is sensed by a row of photo-cells 14 receiving light from information recorded on the card or tape 16 along the line of contact with discs 5. Core 3 may be transparent, acting to focus light from source 15 on to photo-cells 14, or it may be opaque, the light source and a focusing or light guiding system being disposed, Fig. 4 (not shown), along an axis which is oblique to record 16. Core 3 may alternatively have a reflective surface and be illuminated from the side to reflect light through holes in record 16 on to the photo-cells 14. The record rotating member may be a reflective drum or, as shown a core 4 carrying discs 6. More than two discs may be provided on the cores, and photo-cells 14 may be arranged in pairs on teeth of a comblike structure extending between the discs. Opaque or reflective rods may be included in core 3 to provide timing signals.
Patent GB-1446547-A (GB)
Title: Lawn mowers
IPC: A01D43/063
Filed: 1973-01-28
Abstract: 1446547 Grass catching attachment for mowers J W L NICHOLS 28 Jan 1974 [28 Jan 1973] 49799/72 Heading A1F [Also in Division B8] A grass catching device for attachment to a mower comprises an endless belt trained around rolls 31, 32 and 33. A roller 26 presses against roller 30 forming a nip. Roller 26 is driven by a chain 28 and sprocket 27 connection to the mower engine. Grass cut by a cylinder blade 13 is delivered onto the belt, guided by a guide plate 34. The grass is then compacted by the nip and delivered to an elongated tube 37 where it is fed into a sack (not shown) secured around a lip 38 of the tube 37. Various arrangements of belts and rollers Figs. 4 and 5 (not shown) permit rear or side delivery of grass. The sack may be replaced by paper webs continuously formed into bags by stitching or adhesive means. The drive may be by means of V belts, toothed belts or gear trains.
Patent GB-1433548-A (GB)
Title: Mould holder arm assembly
IPC: C03B9/40
Filed: 1973-10-26
Abstract: 1433548 Mould holder arm EMHART CORP 26 Oct 1973 [15 Dec 1972] 49889/73 Heading C1M At least one mould holder arm of a mould holder assembly for carrying a plurality of mould halves is provided with a pressure transmitting device corresponding to each mould half, such device being responsive to the pressure in a fluid filled passage located within the arm and communicating with each pressure transmitting device, so that when the mould halves are in engagement with the mould halves on the other arm all the pressure transmitting devices exert substantially the same pressure on their associated mould halves. As shown (Fig. 1) the pressure transmitting device may take the form of bellows 50 communicating with a fluid-filled passage 52. Alternatively (Fig. 2) pistons 60 sliding within chambers 62 constitute the pressure transmitting device. The arm may comprise upper and lower sections connected by a vertical strut, each section being provided with a pressure transmitting device.
Patent GB-1537030-A (GB)
Title: Apparatus for hydraulically transporting sludge
IPC: B65G53/30
Filed: 1975-12-05
Abstract: 1537030 Conveying solids in liquids RUHRKOHLE AG 5 Dec 1975 [7 Dec 1974] 50030/75 Heading F1R A sludge pump has three chambers A, B, C each of which has at one end a sludge inlet valve 2, 4, 6 and a sludge outlet valve 1, 3, 5 and at the other end a pressure water inlet valve 7, 9, 11 a pressure relief valve 8a, 10a, 12a and a pressure equalization valve 7a, 9a, 11a connected to the pressure water source. The valves are controlled by a pressure sensing device 24, 25, 26 and timing means to give a continuous discharge from the pump outlet 35.
Patent GB-1099819-A (GB)
Title: Improvements in or relating to bistable trigger circuits
IPC: H03K3/013
Filed: 1965-11-25
Abstract: 1,099,819. Transistor bi-stable circuits. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Nov. 25, 1965 [Nov. 28, 1964], No. 50162/65. Heading H3T. [Also in Division H2] A transistor bi-stable circuit includes a coupling between the base of each of two transistors Tr 1 , Tr 2  and the collector of the other, each coupling including a pair of opposed diodes D 1 , D 4  and D 2 , D 3  respectively, the common point of each pair beng connected to an RC network (R 8 , C 2  and R 4 , C 1  respectively) having its resistor connected to a fixed potential (U B ). With a negative potential at a and zero potential at b, transistor Tr 1  conducts and transistor Tr 2  is cut-off, capacitors C 1 , C 2  are negatively and positively charged, respectively, and diode D 2  is cut-off. On reversing the inputs a, b, transistor Tr 2  is immediately switched on, changing the output at B from a negative to zero potential. The corresponding change in output A from zero to a negative potential is delayed until capacitor C 1  has charged sufficiently positive (this charging occurring since C 1  is no longer connected to a negative potential through diode D 3 ) to switch on D2, thus cutting- off transistor Tr 1 , both transistors having been conducting during the delay. Capacitor C 2  then charges negatively and cuts off diode D 4  in preparation for a similar but reverse operation when the inputs are reset. Fig. 3 (not shown) depicts a rectifier circuit in which the direction of the load current depends on which pair of two pairs of thyristors are switched on, these thyristors being controlled by the circuit of Fig. 1 which, when triggered, switches off one pair of thyristors and, after a delay, switches on the other pair.
Patent GB-1400297-A (GB)
Title: Method of manufacturing double carpet fabrics
IPC: D03D27/10
Filed: 1972-11-01
Abstract: 1400297 Face-to-face pile fabrics WIRK MASCHINENBAU KARL-MARX-STADT VEB 1 Nov 1972 50390/72 Headings D1E and D1K A woven face-to-face pile fabric has at least two pile yarn sheets 8, 9 woven into one fabric as dead pile whilst another pile yarn sheet 7 joins the fabrics as patterning pile and is woven into the other fabric by two weft threads 5, 6 in superimposed sheds provided by binding warp sheets IV, V and a stuffer warp sheet VI. Simultaneously with the insertion of weft threads 5, 6 a weft thread 4 may be inserted in the first fabric and, in the first fabric, all the pile warps are woven-in by two weft threads 1, 2 in superposed sheds provided by binding warp sheets II, III and a stuffer warp sheet I. Simultaneously with the insertion of the two wefts 1, 2 in the first fabric a weft thread 3 may be inserted in the second fabric.
Patent GB-1237333-A (GB)
Title: Improvements in or relating to screw compressors
IPC: F04C29/00
Filed: 1969-10-15
Abstract: 1,237,333. Screw compressors. GUTEHOFFNUNGSHUTTE STERKRADE A. G. Oct.15, 1969 [Oct. 24, 1968], No.50619/69. Heading F1F. To regulate the output of a screw compressor having main and auxiliary intermeshing screwed rotors 2, 3, Figs. 1, 4 driven by a worm 4 and worm wheel 5, an axially adjustable control slide 7 has a plurality of transverse bores 17 communicating with the compressor working chamber through bores 18 and with an elongate feed opening 19<SP>1</SP> from a passage 19 supplied with lubricating oil under pressure. As the control slide 7 is adjusted rightwardly on rotation of a screwed shaft 9 either by a motor (not shown) or by means of a handwheel 10, the rightmost bore 17<SP>1</SP> is moved out of communication with the opening 19<SP>1</SP> whilst another bore 17<SP>11</SP> is brought into communication with the opening 19<SP>1</SP> so that the zone of the rotors receiving the oil is only insignificantly displaced with decrease in compressor output. As shown, the opening 19<SP>1</SP> co-operates with five bores at any one time, the number may however be different and there may be more than one opening 19<SP>1</SP> with associated bores. In an alternative embodiment, lubricant may be admitted to an annular chamber 21, Fig. 5, in a stationary piston 20 which is supplied through bores 22, 23 by a lubricating pump (not shown). On adjustment of a control slide 7<SP>1</SP>, bores 18 are brought into and out of register with the chamber 21 in a similar manner to the bores 17 with respect to the opening 19<SP>1</SP>.
Patent GB-1066050-A (GB)
Title: Improvements in means of propulsion for marine and supra marine vessels or craft
IPC: B63H11/12
Filed: 1965-11-30
Abstract: 1,066,050. Hydraulic jet-propulsion. A. P. PEDRICK. Nov. 30, 1965, No. 50700/65. Heading B7V. An hydraulic jet-propulsion unit for a waterborne craft, comprises a tube (1), Fig. 1 (not shown), into whose leading section (5) water of flotation e.g. sea water, is drawn by a rotary or reciprocating pump which is driven by turbineblading (17) through a shaft (15), the turbineblading being propelled by a mixture of water and steam entering a nozzle portion (9) at the rear end of the tube. Steam is generated in the water, so as to produce a reactive thrust, by a hot fluid passing through an annular chamber (11) formed in the wall of the tube (1), said fluid flowing to and from a heat source e.g. a nuclear reactor, through pipes (12), (13) in a sponson (2) by which the unit is attached to the hull of the craft. The hot fluid may flow through said chamber either helically, Fig. 4 (not shown), or axially (Fig. 5, not shown). Alternatively, the chamber 11 may be formed so that the hot fluid circulates through it along two coaxial paths (Fig. 6, not shown). Salt deposits on the inner surface of the tube 1 are removed by a pair of scrapers (19), Figs. 2 and 3 (not shown), attached to the shaft (15).
Patent GB-1363295-A (GB)
Title: Benzodiazepines
IPC: C07D243/12
Filed: 1971-11-02
Abstract: 1363295 Benzodiazepines BOEHRINGER INGELHEIM GmbH 2 Nov 1971 [2 Nov 1970] 50943/71 Heading C2C Compounds of the general formula (R 1,2  = H or alkyl or alkenyl group containing up to 4 carbon atoms and optionally substituted by OH or dialkylamino, or NR 1 R 2  = heterocyclic group optionally containing a second N atom and/or substituted by a methyl, phenyl or tolyl group; R 3  = Ph optionally o-substituted by halogen, CF 3  or NO 2 ; R 4  = halogen, CF 3  or NO 2 ) and their acid addition salts are prepared by reacting a compound of the formula (X = halogen or C 1-4  alkoxy or alkylthio) with R 1 R 2 NH, optionally followed by alkylation when R 1,2  = H and/or salt formation. When X = halogen the starting material may be prepared in situ by reacting the corresponding 2,4- dione with an inorganic acid halide. The above compounds are tranquillizers, and may be administered in the form of pharmaceutical preparations containing them in association with a carrier.
Patent GB-1167749-A (GB)
Title: Improvements in or relating to Clutch Discs with Oscillation Dampers
IPC: F16D13/68
Filed: 1966-11-17
Abstract: 1,167,749. Resilient couplings. FICHTEL & SACHS A.G. 17 Nov., 1966 [20 Nov., 1965], No. 51481/66. Heading F2U. A friction-lined clutch disc assembly 2 is resiliently connected to its hub 1 by successively operative no-load range and normal range oscillation damping, tangentially disposed, frictionally damped helical spring devices 4, 3, the device 4 being operative in a torsion angle range up to  14 degrees and having a very flat spring characteristic curve with a spring rate up to 0À5 k.p.m/degree, and the device 3 being operative in a torsion angle range adjoining that of the device 4 and having a spring characteristic curve including a relatively steep rise with a spring rate between 1À5 k.p.m/degree and 10 k.p.m/degree for passenger-carrying vehicle clutch discs and 10 k.p.m/degree and 70 k.p.m/degree for goods carrying vehicle clutch discs. As shown, the normal range device 3 comprises springs 8 in windows respectively in the clutch disc assembly 2 and plates 7, 6, which are rotationally fast with an inner member 5 journalled and centred on the hub 1. Friction damping discs 9 are clamped between the assembly 2 and the plates 7, 6 by springs 11 acting on the plate 6. The no-load range device 4 comprises springs 15 in windows respectively in a flange 14 of the hub 1 and plates 13, 12 connected together by pins 16 plate-separating stops 17 on which engage, with lost-motion, circumferential end walls of peripheral recesses (18) in the flange 14. Friction damping discs 19 are clamped between the flange 14 and the plates 12, 13. The plate 12 is connected fast with the member 5 by pins 10. In operation, in the no-load range only the device 4 is inoperative, the device 3 acting as a rigid coupling. When the stops 17 engage the walls of the recesses (18) the device 4 is bridged and the device 3 is operative for normal range. To provide for a transitional curve between the no-load and normal ranges, only some of the springs 8 are operative in the first part of the normal range, there being clearances provided between some of the springs 8 and the assembly 2. In Figs. 4-6 (not shown), the no-load range is terminated by the taking-up of lost-motion in a clearance spline connection between the inner member of the device 3 and the hub 1, thereby completely by-passing the whole of the device 4 in normal range. Reference has been directed by the Comptroller to Specification 981,945.
Patent GB-1186456-A (GB)
Title: Photoelectric Photometer
IPC: G01J1/44
Filed: 1967-11-13
Abstract: 1,186,456. Photo-electric exposure meter. MINOLTA CAMERA K.K. Nov. 13, 1967 [Dec.24, 1966], No.51624/67. Heading G1A. [Also in Division G2] In a photo-electric exposure meter a meter movement is replaced by two lamp bulbs, one energized by a source and other energized by the source but regulated also by the incident light, and means functionally associated with a scale plate are provided to adjust a resistor in the detector circuit and/or the incident light to bring the lamps to equal luminosity. Numerous transistor circuits for photo-conductors, photo-voltaic devices and photo-transistors are exemplified including temperature compensating and sensitivity modifying arrangements. In an exposure meter Fig.4 the illumination of a light diffusing plate 41 by bulbs 3 and 8 is viewed through a lens 40 and the amount of light incident on photo-cell 10 through aperture 45 and mirror 46 is adjusted by turning shaft 40 by a ring 31. Film speed may be set into a central dial carrying f numbers and EV value is indicated. A camera including such a meter in which the meter and camera apertures are coupled and a variable resistor in the detector circuit is associated with the shutter speed control is described with reference to Fig. 2 (not shown) and in a practical embodiment, Figs. 5 and 6 (not shown), the camera has an iris regulating ring with a coaxial gear coaxial with a light meter iris, and the shutter speed control which is also a ring rotates a potentiometer wiper through gearing. An opal glass on the back of the camera, is divided by a sawtooth line and serves as the lamp comparison screen.
Patent GB-1293952-A (GB)
Title: Microwave window
Inventor: MANN JOSEPH K
IPC: H01P1/08
Filed: 1969-10-22
Abstract: 1293952 Waveguide windows VARIAN ASSOCIATES 22 Oct 1969 [15 Nov 1968] 51845/69 Heading H1W The usable high-power bandwidth of a microwave window mounted in a gas-tight manner across a section of circular waveguide sandwiched between two sections of rectangular waveguide, and having at least two interfering resonance modes falling within its pass-band, is increased by arranging that the electrical path length through the window varies transversely of the window in such a manner that its value at the regions of maximum intensity of the interfering modes is, for the mode of higher frequency, less than, and for the mode of lower frequency, greater than, the mean path length through the window for the main propagating mode. The arrangements described include windows which are thicker near the centre than at the periphery (Fig. 9, not shown). The arrangements of Fig. 10 extend the bandwidth between modes having a maximum intensity at the peripheral region of the window, and at an intermediate radius, respectively. The thickness variation may be achieved by machining, or by fixing dielectric slabs in the form of discs or rings on the face of the window. In an alternative embodiment (Fig. 11, not shown), the electrical path length through different regions of a window of uniform thickness is varied by the use of different dielectric materials, e.g. beryllia for the peripheral, and alumina for the central, region of the window.