baber/WOPTO huggingface dataset:
Patent GB-1184697-A (GB)
Title: Audio-Visual Apparatus
Inventor: CAMERON HUGH ELLIOT
IPC: A63J17/00
Filed: 1966-03-19
Abstract: 1,184,697. Illuminating device. H. E. CAMERON. 20 March, 1967 [19 March, 1966; 26 Oct., 1966], Nos. 12213/66 and 47999/66. Heading A6M. [Also in Divisions G2 and G5] In an apparatus for visualizing music comprising an optical projection device in association with e.g. a piano keyboard, ten lamps 11, 21 . . . (only two shown) and associated windows 10, 20, . . . corresponding to the ten fingers of a player's hands, form the projection device and sets of coloured, shaded or patterned screens 22-25, 12-15 . . . are interposed in the light parts between the lamps and the windows in accordance with particular notes and octaves played. The screens 12, 22 and 13, 23 correspond to different octaves . . . B, C' . . . and the screens 14, 24 and 15, 25 correspond to different notes B, C'. The keys may constitute magnetic heads sensitive to magnetically patterned gloves on the player's fingers so that each lamp is energized only in correspondence with the actuation of a key by a particular finger.
Patent GB-1450954-A (GB)
Title: Bi-state varactor diode and hf phase modulator incorporating same
IPC: H01L29/00
Filed: 1973-10-16
Abstract: 1450954 Semiconductor varactor diodes; waveguide switches and phase-shifters HUGHES AIRCRAFT CO 16 Oct 1973 [9 Nov 1972] 48092/73 Headings H1K and H1W [Also in Division H3] A varactor diode which can be switched by a variable reverse-bias voltage between two substantially stable capacitance values comprises a P-N or Schottky barrier junction at or near a surface of a semiconductor body, the concentration of ion-implanted impurity in the body in the direction away from the junction having a profile, Fig. 3, defining a single region 34 of maximum concentration adjacent the junction and separated by a steep gradient 38 from a single region 42 of minimum concentration. In the device of Fig. 2a, an initially N- epitaxial Si layer 12 is formed on an N<SP>+</SP> substrate 10, and is subsequently given the required impurity profile by the implantation through a window in a SiO 2  layer 14 of arsenic ions having a dosage of ca. 10<SP>14</SP>.cm<SP>-2</SP> and an implantation energy #300 KeV. Boron ions are next implanted at ca. 5 KeV and dosage ca. 5 x 10<SP>14</SP>. cm<SP>-2</SP> to form a P<SP>+</SP> region 26. After annealing, the device is metallized to provide vapour-deposited ohmic contacts 29, 27 to substrate 10 and region 26, contact 27 suitably including successive layers of Ti, W and Au. Finally a Au-Ni lead 28 is connected to contact 27. In a modification (Fig. 2b, not shown) the P<SP>+</SP> region 26 is omitted, a Schottky barrier at the surface of layer 12 being formed by deposition thereon of a Ti pad (31) which is covered with a Au pad (27<SP>1</SP>) before connection of lead 28. Use of such a varactor diode in a binary 0-# phase-shift PCM microwave application is shown in Fig. 5a, in which the diode 30 is located in the passage 66 of a waveguide structure 64 comprising also a movable tuning short 68. The diode is secured to an Ag pin 72 separated by a post 73 from a RF choke filter 74 within an insulating seal 78. The application of pulses from a driver (90, Fig. 6, not shown) to post 73 switches the diode between its two capacitance states, so causing the waveguide to operate in a seriesresonant or parallel-resonant mode, the reflected energy thus being varied between phase and antiphase states. Reference has been directed by the Comptroller to Specification 1,218,666.
Patent GB-1067276-A (GB)
Title: Method for preparation of spherical thorium dicarbide and thorium-uranium dicarbide particles
IPC: C01B31/30
Filed: 1963-12-05
Abstract: Spherical thorium dicarbide particles may be prepared by mixing an aqueous thorium oxide sol containing nitrate in a concentration of at least 10-4 molar and in a nitrate to Th ratio of 0.05 to 0.15 with finely divided carbon in a C to Th ratio of at least 4 to 1, dispersing the mixture in a water-immiscible inert organic liquid of approximately equal density, agitating to produce droplets, adding an organic liquid drying agent to remove water from, and thereby solidify, the droplets, separating the particles and firing them at 1400 DEG  C. or above in an inert atmosphere.  U values may be provided in the sol in up to 10% of the total metal. The state of agitation is characterized by a modified Reynolds number of 1.1 x 104 to 2.8 x 104. The dispersant may be CCl4, trichloroethylene and perchloroethylene.  Thus thorium dicarbide particles of 100-250 microns diameter may be prepared by mixing the sol with carbon as above, the sol containing thorium oxide in a concentration not exceeding 2 molar, adding to CCl4, agitating to produce a state of agitation characterized by a modified Reynolds number of 1.5 x 104 to 2.2 x 104, drying and firing as above. Before firing the particles may be dried in an oven at 90 DEG  C. for 4-16 hours.  Thorium oxide may be prepared by contacting the nitrate with superheated steam, by denitration in air, by precipitation of hydrous oxide, or by calcination of thorium oxalate.  U values may be provided as uranyl nitrate, as a dispersable oxide such as hydrated UO3 or as precipitated ammonium diuranate. The drying agent may be methanol, ethanol, isopropanol or acetone.  The inert atmosphere may be of argon.  It is preferred that the carbon has a similar particle size to the thorium oxide.  The nitrate ion concentration may be 10-3 to 10-4 molar.  The carbon may have a mean particle size not exceeding 350 angstroms, and a surface area of at least 600 m.2/gm.
Patent GB-1125887-A (GB)
Title: Photo-printing apparatus
IPC: G02B3/08
Filed: 1965-11-15
Abstract: 1,125,887. Optical system for photo-copying. AGFA-GEVAERT A. G. Nov. 15, 1965 [Nov. 20, 1964], No. 48329/ 65. Headings G2A and G2J. The optical system in a photo-copying apparatus consists of a number of bars 4-9 of synthetic plastics material, each bar comprising a series of lenses 4a, 5a, &c. spaced along its length. The bars are supported in facing pairs, as shown, by a series of spacer elements 10-14, and arranged in a mounting 3. The design of the system is considered theoretically. Two fluorescent lamps 16,17 are mounted parallel to the lens bars, the light being concentrated by reflector plates 19, 20 on to the original sheet 18. This moves past an exposure slit-aperture 1a in the direction A. The copy paper 21 moves in the same direction B with the same velocity. Alternatively the optical and lighting system could itself move in the direction C. In the modification of Fig. 3 (not shown), an image of a moving original 18 is projected by two lens bars 34, 35 and a mirror 37 on to a moving copy sheet 21 passing round a roller 36. The roller itself may also have a velocity V 2 . Fig. 4 (not shown) is another alternative having three mirrors. (An odd number of mirrors ensures a laterally correct reproduction image. ) In Fig. 5 (not shown) an image of a stationary original 41 is produced on the remote side of a stationary copy by a moving optical system. The system provides the advantage of a shortened optical path and hence a more compact construction.
Patent GB-1457686-A (GB)
Title: Manufacture of plastics sheets
IPC: B29C48/07
Filed: 1974-11-08
Abstract: 1457686 Casting plastics films and plates on glass ribbon SAINT-GOBAIN INDUSTRIES 8 Nov 1974 48436/74 Headings B5A and B5B [Also in Division B2] Sheets of transparent plastics of high optical quality are cast from hardenable liquid compositions by depositing a layer 18 of the composition on a continually horizontally moving ribbon 30 of glass, allowing the composition to harden, and stripping it from the glass. A glass ribbon 30 is made by the float glass process and fed directly by support rollers 2 through a cooling unit 3, a washing device 4, and a dust-free enclosure 6 through which filtered air is passed. One or more layers of a plastics melt solution, or reacting mixture are deposited by slit coating heads 17 (Fig. 1) or 40, 41 (Fig. 2, not shown) after a release agent has been applied to the glass. Heaters 11-14 maintain the glass and the plastics at a temperature suitable for curing the plastics. The sheet is removed around rollers 19-21 and covered by protective layers 24 before rolling up. A coating of adhesive or colourant may be sprayed on to the sheet which may be used in windscreens.
Patent GB-1187489-A (GB)
Title: Variable Digital Delay Circuit
Inventor: MANSHIP ROGER ALAN
IPC: H04Q11/04
Filed: 1967-10-25
Abstract: 1,187,489. Variable delay systems; multiplex pulse signalling. STANDARD TELEPHONES & CABLES Ltd. 25 Oct., 1967, No. 48467/67. Headings H4L and H4R. A variable delay circuit receives a stream of PCM channels and delays it until it synchronizes with a transmitted PCM multiplex frame, the synchronizing being effected by generating a pulse PIN on detection of a synchronizing channel in the received PCM stream and passing this pulse along a delay line SR1; the point reached by the pulse PIN, when the synchronizing channel appears in the transmitted PCM stream and gives rise to pulse P REF , being marked to indicate the delay required; the received PCM stream being passed along a delay line SR2 to be tapped off at that point corresponding to the marked point of SR1. The delay lines are stepping registers and follow a fixed delay D. Each stage of SR1 has an associated bi-stable B set by coincidence of PIN in a stage of SR1 and P REF . The set bi-stable B gates the digit stream out of the corresponding stage of SR2. To make sure that pulse PIN is wide enough to be entered in at least one stage of SR1 it must from time to time enter two consecutive stages. To prevent the consequent setting of two bi-stables B from gating the digit stream from two points of register SR2 the connections between bistables B and gates G11 to G15 are such that, as shown in dotted lines, the gates can be opened by a reset followed by a set bi-stable and not by set followed by set or set followed by reset bi-stables. The variable delay is employed in the looped telecommunication system described in Specification 1,187,488.
Patent GB-994170-A (GB)
Title: Catalytic dehydrogenation
IPC: C07C5/32
Filed: 1962-12-27
Abstract: Aromatic hydrocarbons having an alkyl side chain of at least 2C or mono-olefins having at least 4 non-quaternary carbon atoms in a straight chain are dehydrogenated by passage together with steam in contact with a two-stage catalyst the first stage being of higher selectivity than the second stage and the second stage being of higher activity than that in the first stage.  The description is devoted almost entirely to the production of styrene from ethyl benzene.  Selectivity is defined as the amount of dehydrogenated product produced per quantity of alkyl aromatic reacted and activity is defined as the quantity of dehydrogenated product produced per unit time per unit of catalyst, the unit of concentration of feed at a given temperature.  The catalyst of higher selectivity may be an oxide of Fe, Ti or Zr promoted with a compound of K, Cs, Ca, Sr, Cu, Zn, Cd, Cr, Mn, Co, Ni, Th, Zr, Ce, Pb, Bi or Al with a binder and that of higher activity iron oxide promoted with an oxide of the above promoting metals.  Reaction is effected at 500-800 DEG  C. and 1-30 p.s.i.a. using 1-30 mols of steam per mol of hydrocarbon.ALSO:A bed of dehydrogenation catalyst suitable for use in the catalytic dehydrogenation of e.g. ethylbenzene to styrene comprises 2 layers, at least one being an outside layer and having a "high selectivity" and another layer, being an outside layer having a "high activity", the catalyst of high selectivity having a higher selectivity than the catalyst of high activity and the catalyst of high activity having a higher activity than the catalyst of high selectivity.  With reference to the dehydrogenation of ethylbenzene to styrene "selectivity" is defined as the amount of styrene produced per quantity of ethylbenzene reacted.  "Activity" is defined as the quantity of styrene produced per unit time per unit of catalyst per unit concentration of ethylbenzene at a given temperature.  The catalyst is preferably iron oxide to which may be added TiO2 or ZrO2 promoted with a CS, Rb, K, Ca, Mg, Sr or Ba compound.  Other promoters mentioned are oxides of Cu, Zn, Cd, Cr, Mn, Co, Ni, Th, Ce, Pb, Bi and Al.  Supports such as silicates, cement, kaolin and aluminates may be included.
Patent GB-1206858-A (GB)
Title: A transducer head assembly
IPC: G11B5/55
Filed: 1968-10-15
Abstract: 1,206,858. Mounting magnetic heads. NATIONAL CASH REGISTER CO. 15 Oct., 1968 [2 Nov., 1967], No. 48724/68. Heading G5R. A flying head assembly includes a head unit 28 spring-biased 38 towards a record surface 10 and a flying pad 32 having an inclined leading edge 34 and extending forwardly of the unit 28 on a cantilever portion 30. Several head units and pads are mounted in each of six frames 54 co-operating with both sides of three magnetic discs. The springs 38 extend from a rod 40 axially adjustable by means of screw 68 and clamp 72 and rotatably biased by spring 62 coupled between the frame at 64 and a lever 61 fixed to the rod 40. Rods (84, 86, Figs. 4-8, not shown) have studs (80, 82) engaging in notches 76, (78) in the levers 61 to move the heads towards and away from the discs when they are moved vertically by a follower (98) riding on a cam surface (100) at the base of a turret carrying the head mounting and positioning mechanism (22) so that the heads are automatically disengaged when the head assembly is rotated away from the discs. The frames 54 also carry circuit cards 99.
Patent GB-1431249-A (GB)
Title: Compositions and processes for the treatment of steel surfaces
IPC: C23C22/02
Filed: 1974-11-12
Abstract: 1431249 Modifying steel surfaces NIPPON STEEL CORP 12 Nov 1974 [12 Nov 1973] 48834/74 Heading C7U A liquid composition for applying to steel surfaces comprises (wt by per cent) 5 to 50 Fe 3  O 4 +Fe 2  O 3 , 0À01 to 5 phosphoric acid, at least 0À01 of one or more of Pb, Ni, Cu, P, Zn, and Cr, added as powdered Ni, Cu, Zn, Cr, copper oxide, lead dioxide, chromic oxide, lead phosphate or lead or zinc chromate, and 3 to 30 of butyral resin. The solvent may be water, alcohol, butanol or toluene. Additional resins, e.g. melamine, phenolic or nitrocellulose may be added. The solution may also contain primary phosphates of Al, Fe, Na, Zn, and Mn.
Patent GB-1197690-A (GB)
Title: Variable Resistor with Rectangular Resistance Element.
IPC: H01C10/32
Filed: 1968-10-15
Abstract: 1,197,690. Variable resistors. STACKPOLE CARBON CO. 15 Oct., 1968 [23 Oct., 1967], No.48858/68. Heading H1S. A rotary variable resistor comprises a substrate, a coating 3 of resistance material thereon of rectangular shape, a pair of terminals 4 projecting from the edge of the coating, at least one of the terminals being at a corner of the coating, said coating having a gap 6 extending from said edge between said terminals and then part way around the centre of the coating. The substrate and coating are equipped with an aperture 5 for receiving a rotatable shaft. The resistance curve can be adjusted by punching holes 8 or a notch in the substrate, or by forming grooves in the substrate and coating the grooves with the resistance material in order to lower the resistance of that portion (Fig. 3, not shown). Various alternative methods of forming the gap are described including one in which the slot is cut in the substrate before the resistance coating is applied (Figs. 3 and 4, not shown), and one in which an integral ridge is formed on the substrate, the substrate then being coated and the coating on the ridge being removed (Figs. 5 and 6, not shown). Three potentiometers utilizing the invention are described. In the first, a metal current collector is attached to the face of the substrate opposite the coating, two sliders being provided on the rotatable spindle to contact the coating and the collector. In the other two embodiments the coating and the collector are placed in a spaced-apart face to face relationship on separate substrates with an insulating rotor carrying the contact disposed therebetween. In one arrangement (Figs. 10 to 13, not shown), the contact is in the form of a wide ring or a coil spring (42) which contacts both the coating and the collector and abuts the outer casing of the device. In another (Figs. 14 to 17, not shown), the contact is in the form of a metal bridging contact (69) disposed in an aperture in the rotor.
Patent GB-1373446-A (GB)
Title: Reflectors
IPC: F21V29/505
Filed: 1972-10-26
Abstract: 1373446 Lamp reflectors H M WORWAG [trading as BERNHARD DELTSCHAFT] 26 Oct 1972 [13 Nov 1971] 49411/72 Heading F4R A reflector for floodlamps and similar intensive radiators comprises two component concave reflectors 2, 3 having a common optical axis and focal point, each component reflector extending through 180 degrees about the axis and having its edge disposed in a common plane containing the axis, the component reflectors being arranged on opposite sides of the plane and having different parameters so that a gap 5 for the circulation of cooling air is formed between the edges of the component reflectors in the common plane.
Patent GB-1328680-A (GB)
Title: Preparation of copolyamides
IPC: D01F6/60
Filed: 1970-10-19
Abstract: 1328680 Fibres of ordered copolyamides E I DU PONT DE NEMOURS & CO 19 Oct 1970 [14 Nov 1969] 49554/70 Heading B5B [Also in Division C3] A process for preparing an ordered copolyamide comprises reacting a benzoyl hydrohalide Q<SP>+</SP>H 3 <SP>-</SP>N-Ar-CO-Q<SP>1</SP> with a p-phenylene diamine H 2 N-A 2 <SP>1</SP>-NH 2 , where Ar and Ar<SP>1</SP> are each p-phenylene radicals which may have 1 or 2 non-interfering substituents and Q and Q<SP>1</SP> are each halogen, in a molar ratio between 4 : 1 and 24 : 1 in one or more of hexamethylphosphoramide, N,N-dimethyl acetamide or propionamide, N-methyl-pyrrolidone-2 and N,N,N<SP>1</SP>,N<SP>1</SP>- tetramethyl urea as solvent at below 50‹ C. followed by reaction with an equal molar amount with respect to the diamine of a diacid chloride Cl-CO-(CH 2 ) x -CO-Cl where x is 2 to 12. The polymers are stated to exhibit high tensile strength and other units may also be present in the polymers provided they do not substantially reduce the tensile strength e.g. up to 10 mol. per cent of other p-oriented aromatic amide units. Reaction may be effected in the presence of various mono-functional amino, hydroxy, acid or isocyanate compounds as chain terminators; lithium chloride to assist solubility which is desirably formed in situ from lithium carbonate, oxide, hydroxide or hydride and HCl liberated during the reaction; and conventional additives such as dyes, fillers, UV stabilizers and antioxidants. Numerous possible substituents for Ar and Ar<SP>1</SP> are listed. In all the specific examples unsubstituted p-aminobenzoyl chloride hydrochloride and p-phenylene diamine are used as the aromatic reactants in ratios of 4, 8, 12, 18 and 23 to 1 and succinyl, adipyl, dodecanedioyl and pimeloyl chlorides as aliphatic reactant without comonomers or chain terminators.  Uses.-The polymers may be spun into fibres from solutions in the reaction solvents plus lithium chloride or in concentrated H 2 SO 4 , ClSO 3 H or HF which may contain 5 to 12 wt. per cent copolymer and 4 to 6 wt. per cent LiCl, suitably into water. The fibres are stated to be useful for tyre cords or reinforced plastic laminated articles such as skis, bows, fishing rods and golf club shafts. Fibre treatment.-The fibres may be drawn up to 50% while being heated at 300 to 600‹ C. for 0À1 to 10 seconds. The spinning and heat setting is described in the examples and the effect on the tensile properties illustrated. Reference is made to Specifications 1,008,854, 1,198,082 and 1,198,083.
Patent GB-1068756-A (GB)
Title: Magazines for fastener driving tools
IPC: B25C1/04
Filed: 1965-08-04
Abstract: 1,068,756. Stapling and nailing machines. SIGNODE CORPORATION. Aug. 4, 1965 [Aug. 24, 1964], No. 49737/66. Divided out of 1,068,755. Heading B4C. A magazine assembly for a fastener driving tool, such as for nailing or stapling, comprises a guide 72 having a magnet 74 for retaining a row of staples 71 thereon and a spring-loaded follower 76 for biasing the fasteners into position to be driven. In a modification, the magnet 74 may be located within the guide and the staples are arranged to straddle the guide. In a further modification, the heads (92, Fig. 7) of a row of nails 93 are arranged to be located by the top of a guide bar 90 in which the magnet 74 is fitted.
Patent GB-1446457-A (GB)
Title: Reflex camera
IPC: G03B7/085
Filed: 1973-10-25
Abstract: 1446457 Electromagnetic brakes FRANKE & HEIDECKE GmbH 25 Oct 1973 [28 Oct 1972 24 Nov 1972] 49851/73 Heading F2E [Also in Division G2]  In a camera (see Division G2) a cam 58 moves to adjust the diaphragm aperture until the correct value is reached, whereupon an electromagnet 65 is energised to halt an armature disc 63 non-rotatably and non-slidably mounted on a common shaft 66 with a pinion 62. Halting disc 63 thus halts pinion 62 and cam 58. Optionally, shaft 66 is flexible so that disc 63 can actually contact electromagnet 65. In Fig. 2 (not shown) disc 63 is again non-rotatably mounted on shaft 66 but is axially movable into engagement with electromagnet 65 to halt pinion 62.
Patent GB-1494323-A (GB)
Title: Coupling element for pipe ends
IPC: F16L19/08
Filed: 1974-11-19
Abstract: 1494323 Pipe couplings ETABS LOTIGIE 19 Nov 1974 [21 Dec 1973] 49910/74 Heading F2G A coupling for a pipe 2 of, e.g., plastics material, comprises a sleeve 1 in which is received the end of the pipe 2 and a first end of a tightening ring 7 disposed around the pipe end. The ring 7 may be of metal or hard synthetic material and has in its bore a gripping surface to engage the outer surface of the pipe 2. The gripping surface may consist of saw-toothed circular ribs in the form of a screw thread, one face of each rib being radial and facing towards the first end of the ring 7. The second end of the tightening ring 7 is made, e.g., with longitudinal slits, so that its diameter can be forcibly reduced. A locking ring 15 having an inner conical bore 16 is screwed on to the sleeve 1 so that the bore 16 engages the outer surface of the second end of the ring 7 to force the gripping surface to grip the pipe. The coupling may also comprise an 0-ring 6 encircling the pipe 2 and compressible between the ring 7 and the sleeve 1. A spacer ring may be included between the ring 7 and the 0-ring 6. A female 3 may be provided to give internal support to the pipe.
Patent GB-1280946-A (GB)
Title: Data processing apparatus
IPC: G06K13/02
Filed: 1970-10-21
Abstract: 1280946 Statistical apparatus FRIDEN HOLLAND NV 21 Oct 1970 [21 Oct 1969] 50049/70 Heading G4M A card such as a ledger card bearing a magnetic strip can be fed past a read station on one side of a guide plate 12 which has an opening accommodating a deflector 2 which when actuated diverts the card to a parking position on the other side of plate 12, drive for the card being supplied by a friction roller 14. In operation the card is driven downwards by rolls 18 to a printing station until a photo-cell detects the card trailing-edge to reverse rolls 18. A solenoid is energized to actuate deflector 2 until the upper edge of the card has reached roll 14 when the deflector is released to co-operate with roll 14 and thus drive the card to the parking position. On command the card may be driven back to the printing position, the read head now being switched on to allow printing of data recorded on the magnetic strip and of results of calculations.
Patent GB-1484508-A (GB)
Title: Liquid development apparatus
IPC: G03G15/10
Filed: 1974-11-20
Abstract: 1484508 Electrostatographic developing XEROX CORP 20 Nov 1974 50309/74 Heading G2H A liquid developing apparatus comprises an applicator roll 12 on to which liquid developer 50 is directed by a weir 40 in a supply means 30 having inlet 34 allowing low-pressure supply of the developer 50. Excess liquid 50 flows out through pipes 48 and 72 for recycling. A seal strip 55 prevents liquid 50 escaping past the applicator roll 12. A doctor blade 60 is provided and an enclosure 70 houses the apparatus.