baber/WOPTO huggingface dataset:
Patent GB-1008119-A (GB)
Title: Boat construction
Inventor: GREEN GREVILLE RONALD
IPC: B63B5/00
Filed: 1963-10-07
Abstract: 1,008,119. Plywood skin boats. TANGYES Ltd. Sept. 28, 1964 [Oct. 7, 1963], No. 39334/63. Headings B7A and B7S. A hull shell, e.g. for a dinghy, is formed by cutting from a sheet of plywood a shell blank 9 which will extend from the keel 10 to the gunwale 11, cutting in the blank a series of slits 13 extending from the gunwale edge and which will extend along geodesies of the shell when formed, individually bending the tongues formed between said slits to the positions which they are to assume in the finished shell and then securing the tongues in said positions. Strips of plywood 14 are secured over the internal surface of the tongues and extend along a second set of geodisics transverse to the first. The hull is built by mounting the hog 10 and gunwale 11 on a male mould of the shell, attaching a pair of the blanks 9 to the hog, shaping the blank to the mould and then attaching the tongues to the gunwale.
Patent GB-1508418-A (GB)
Title: Parking guidance systems for aircraft
IPC: B64F1/22
Filed: 1977-09-22
Abstract: 1508418 Guiding aircraft to parking position N-E ANDERBERG 22 Sept 1977 [29 Sept 1976] 39493/77 Heading G4F To assist aircraft parking, means disposed in the parking place area senses the aircraft's passage and controls a unit to inform the pilot of the distance up to the stopping point and when that point is reached. Different types of aircraft are catered for and the information unit may be visual or audible and may be in the aircraft. In an embodiment the sensing device comprises elongated contactors, e.g. 14 (or equivalent photo-electric or acoustic sensing may be employed) passed over by nose wheel 15. The information unit 7 is mounted on the terminal building.
Patent GB-1011506-A (GB)
Title: Salts of carboxylic acids
Inventor: SPALL BRIAN CLIFFORD
IPC: C07C51/41
Filed: 1963-10-08
Abstract: The dialkali metal salts of dicarboxylic acids are obtained as dry, finely-divided solids by mixing an aqueous solution of the salt with an inert hydrocarbon and a dispersing agent and distilling the mixture to remove the water as its azeotrope with the hydrocarbon. The aqueous salt solution may be obtained by reacting in alkal metal hydroxide, carbonate or bicarbonate with the dicarboxylic acid in aqueous solution.  The specified hydrocarbon is xylene.  Suitable dispersing agents are polyoxyethylene sorbitan esters and sulphated alkyl phenols. Examples relate to disodium phthalate and disodium succinate.
Patent GB-914755-A (GB)
Title: Low frequency phase-sensitive detection system
IPC: H03C1/58
Filed: 1959-11-23
Abstract: 914,755. Phase-sensitive detectors. CANADA, MINISTER OF NATIONAL DEFENCE. Nov. 23, 1959 [Dec. 1, 1958], No. 39705/59. Class 38 (4). The phase sense and amplitude of a lowfrequency signal, e.g. 100 c/s. to <SP>1</SP>/ 100  c/s., is detected relative to a reference signal of equal low frequency by modulating both on one or a pair of equal carrier frequencies, e.g. 5 kc/s., before synchronous detection at carrier frequency. By this, the ring demodulator input transformers used may be much reduced in size, due to the higher frequency. As shown, a square wave 1 c/s. reference signal is applied together with a 5 kc/s. carrier to a ring modulator 13 and a 1 c/s. signal whose phase to to be detected is applied, with 5 kc/s. carrier, to a further ring modulator 12. Both modulated carrier outputs are then applied to a ring demodulator 18 with D.C. output a cos # at 19, where a is the 1 c/s. signal amplitude, # the phase difference and a cos # reverses in polarity at the instants of polarity reversals of the square wave. In modifications the demodulator 18 is fed with 5 kc/s. carrier and with 5 kc/s. carrier doubly modulated in turn by the 1 c/s. square wave and 1 c/s. signal wave in two ring modulators connected in tandem with the demodulator 18.
Patent GB-946919-A (GB)
Title: Improvements relating to the correction of drift in direct coupled amplifier arrangements
Inventor: BALLARD GEOFFREY GEORGE
IPC: H03F3/40
Filed: 1959-11-24
Abstract: 946,919. Semi-conductor amplifier circuits; amplitude modulation systems; circuits of controlled non-linear capacitors. ELLIOTT BROS. (LONDON) Ltd. Feb. 23, 1961 [Nov. 24, 1959], No. 39811/59. Headings H3B, H3R, H3T and H4L. In a direct coupled amplifier arrangement in which the drift potential or current is modulated, amplified, demodulated and applied to the amplifier to compensate for drift, the modulation is effected by varying the bias on one or more solid state variable capacitance diodes. In Fig. 1, a D.C. amplifier 1 is fed by two parallel paths, one via capacitor 5 and the second by bridge modulator 3 to which a reference oscillation is also applied, A.C. amplifier 2 and phase sensitive detector MR1, feedback being provided by resistor R10. The drift component of the output is fed back to the modulator 3 and dependent on its polarity will cause one arm to increase in capacity and the other to decrease. The resulting out-of-balance signal will be applied to amplifier 2 and then to MR1 which supplies a voltage of the correct magnitude and polarity to stabilize the amplifier. In another embodiment, Fig. 2 (not shown), the output of amplifier 2 is fed back to centre tapped transformer T1, so that when the bridge is out of balance amplifier 2 acts as an oscillator, the frequency being determined by tuning transformer T2. The amplifier 2 has a square law characteristic and the output is limited by diodes to prevent loop instability. In this mode of operation the reference oscillation is omitted and as the arrangement will only oscillate with a particular polarity input, the phase sensitive detector is replaced by a halfwave rectifier. This rectifier is biased to a level corresponding to full scale signal in the negative direction and this is counteracted by unbalancing the bridge so that with no input, the input to amplifier 1 is zero. Under these conditions the input to amplifier 2 may swing from positive to negative depending on the polarity of the input signal.
Patent GB-1156166-A (GB)
Title: A Machine for and a Method of Producing a Hollow Body from an Elongate Strip
IPC: B21C37/12
Filed: 1966-09-06
Abstract: 1,156,166. Making tubular bodies; coiling; welding by pressure. NORD-AVIATION SOCIETE NATIONALE DE CONSTRUCTIONS AERONAUTIQUES. 6 Sept., 1966 [6 Sept., 1965; 24 Aug., 1966], No. 39893/66. Headings B3A, B3E and B3R. Apparatus for winding strip on a rotating mandrel includes means, to lay the strip on the mandrel or on a jacket thereon, positioned and orientated by control means according to the shape of the mandrel. Profiled strip 3 from a reel 31 is wound helically on a jacket 2 supported by a rotated elliptical section mandrel 7, Fig. 2. The strip 3 is guided on to the jacket 2 by a member 17 on an arm 21 pivoted at 24 on a member slidable to and from the mandrel 7 on a carriage 27. The carriage 27 is pivotally adjustable on a slide 11 moved axially of the mandrel by a lead screw 13. A cam 14 driven by a motor 20 rocks the arm 21 and a cam 15 driven by a motor 19 moves the arm support to and from the mandrel, the motors 19, 20 being synchronized with the motor driving the mandrel 7. The edges of the profiled strip 3 overlap on the jacket 2 as at 4<SP>1</SP>, 5<SP>1</SP>, Fig. 5, and may brazed together and the strip to the jacket or be the strip may be welded to the jacket by a resistance welding wheel 57, (28), Fig. 4 (not shown). In another embodiment, Fig. 6, the strip 3 is coiled on a jacket 2<SP>1</SP> supported by a two-part hyperboloid mandrel 7a, 7b, the guide member 17 being pivoted on a carriage 38 and rocked by a cam 15<SP>1</SP>. The carriage 38 is moved along a plate 36 to and from the mandrel by a screw driven by a motor 39. The plate 36 is pivoted about a vertical axis by a motor 37 and is carried by a carriage 27 moved axially of the mandrel by a lead screw 13. A welding wheel 57 carried by the member 17 resistance welds the strip 3 to the jacket 2. If the strip is wound directly on the mandrel a jacket is applied over the strip.
Patent GB-880561-A (GB)
Title: An improved method for obtaining rare earth concentrates
Inventor: TOPP NORMAN ERIC
IPC: C01F17/206
Filed: 1957-12-23
Abstract: A process for selectively concentrating one or more of a mixture of rare earths comprises loading a column of a cation exchanger with a mixture of alkali-metal or preferably ammonium ions and mixed rare earth ions and eluting the column with a solution of an agent which will form complex anions with the rare earth cations.  The column is preferably loaded to from 40% to 60% equivalence, and the elution carried out with a solution of nitrilo-triacetic acid in aqueous ammonia, or an aqueous solution of the tetraammonium salt of ethylene diamine tetra-acetic acid. The preferred cation exchanger is the resin known as "Zeo-Karb 225" ("Zeo-Karb" is a Registered Trade Mark).  Preferably the pH of the loading solution is so adjusted that the pH of the eluate remains constant.
Patent GB-1537022-A (GB)
Title: Perspective drawing apparatus
IPC: B43L13/14
Filed: 1975-12-08
Abstract: 1537022 Perspective drawing appliance E E CROSSLEY 8 Dec 1975 [13 Sept 1974] 39952/74 Heading B6P  Equal length arms 28 are pivoted on rulers 26 and on movable set screws 34, which can be moved along slots 32 to give spacings which vary but are always less than the separation of the other ends of the arms on the rulers 26. Depending on the separation of its corresponding set screws 34, each ruler moves as if it were rotating about a vanishing point at a selected distance beyond the edge of board 16. The slots 32 are in plates 30, which can be moved along lateral slots 14 to give vertical adjustment of the vanishing points.
Patent GB-1400201-A (GB)
Title: Electric calculating circuits
IPC: G06J1/00
Filed: 1972-08-30
Abstract: 1400201 Calculating products and quotients FERRANTI Ltd 15 Aug 1973 [30 Aug 1972] 40167/72 Heading G4G Input voltages V1, V2 are sequentially compared in amplifier A2 with a reference voltage Vr (where Vr>V1, V2) stored on a capacitor C and the counter CT1 driven either up or down during the intervals of time determined by the exponential discharge of the capacitor from voltage Vr to each successive input voltage. The capacitor is then discharged from Vr over the total time accumulated in the counter to deter-  mine an output voltage V0 which is a required function of V1, V2. Thus, the counter first counts the time t 1  for the capacitor to discharge from Vr to V1, given by t 1 =RC log Vr/V1, and subsequently the time to discharge from Vr to V2 given by t 2 =RC log Vr/V2. The total count accumulated is thus (t 1 +t 2 )=RC log Vr2/V1.V2. In discharging from Vr over time (t 1 +t 2 ), the capacitor falls to voltage V0 where (t 1 +t 2 )= RClogVr/V0. Hence. V0 = V1.V2/Vr. Voltage Vr is applied to the capacitor C during appropriate intervals by switch S3 actuated by OR gate G5, and voltages V1, V2 applied sequentially to differential amplifier A2 by switches S1, S2. The counter CT1 is fed by a source HFC of high-frequency clock pulses through an AND gate G1, this gate being closed to stop the counting whenever the output of amplifier A2 falls to zero. Reversal of the counter is caused by application of appropriate control signals to AND gates G2, G3 and OR gate G4. During reverse counting the switch S4 is closed and the voltage on capacitor C1 follows that on C. When the count becomes zero, bi-stable device B re-sets and opens S4 whereby the output voltage V0 is stored on C1. This voltage may be transferred to capacitor C2 via switch S5. Fig. 3(i) shows the voltage on capacitor C which is charged to voltage Vr three times during each calculation cycle and discharged sequentially to voltages V1, V2, V0 during respective intervals t 1 , t 2 , (t 1 +t 2 ). The various switches and gates are controlled by a sequence of signal pulses HIJKLMN applied in alphabetical order to the terminals shown on the drawing. The control signals are generated by a decoder fed from a low-frequency counter CT2 (not shown) which re-sets itself at the end of each calculation cycle.
Patent GB-1299946-A (GB)
Title: An apparatus for and a method of switching electrical current
IPC: H01H39/00
Filed: 1970-08-20
Abstract: 1299946 Pressure actuated switches FRANCE ARMED FORCES MINISTER OF 20 Aug 1970 [27 Aug 1969] 40247/70 Heading H1K Electrical current is switched by application of a pressure impulse generated by an explosive charge to a resistive element, the resistance of which falls to 10<SP>-6</SP> of its initial value in 1Á sec. or less. In the embodiment, Fig. 3, the charge 11, detonator 10 and firing socket 15 are disposed in a demountable casing screwed into a support 1, 3 carrying an anvil 2. The element, 13, is disposed between electrodes is moulded insulation 14 to form a unit which can be slid out and replaced after each firing of the switch. Suitable elements are doped or intrinsic sulphur, selenium, silicon, tellurium, gallium phosphide and gallium sulphide, organic materials, oxides and Zener, tunnel or rectifying PN diodes.
Patent GB-1275554-A (GB)
Title: Improvements in or relating to boats
Inventor: SEAR DEREK WILLIAM
IPC: B63B7/02
Filed: 1968-08-23
Abstract: 1275554 Collapsible boats DUNLOP HOLDINGS Ltd 21 Aug 1969 [23 Aug 1968] 40315/68 Heading B7A A collapsible boat comprises buoyant elements 1, 2, 3 of air-permeable flexible cellular material having a flexible fluid-impermeable cover, the cover being provided with valves 16, 17, 18 through which a gas can be admitted to or expelled from the cellular material, the elements 1, 2, 3, being connected together by flexible fluid-impermeable flaps 27. The embodiment shown has a wooden transom 4, the sidewalls and transom being held in position by slide fasteners attached to the connecting flaps.
Patent GB-1060024-A (GB)
Title: Improvements in or relating to methods and devices for applying liquid to porous products
IPC: B27N7/00
Filed: 1965-09-22
Abstract: Particle board or hardboard is impregnated by compressing an impermeable resilient continuous side wall 2 (Fig. 2, not shown) between an impermeable bottom plate 1 and a permeable top plate 5 in the form of the board to be impregnated liquid contained in the space bounded by wall 2 and plates 1 and 5 being forced into plate 5. Compression is effected hydraulically by means of platens 3 and 6. The impregnant is water or an aqueous solution of sodium chlorophenolate.
Patent GB-881171-A (GB)
Title: New or improved safety device for heating apparatus
IPC: F24C3/12
Filed: 1958-12-17
Abstract: 881,171. Valves. CASEY, D. P. Oct. 27, 1959 [Dec. 17, 1958], No. 40710/58. Class 135. Supply of gas or oil to a burner 5 is controlled by a valve member 2 which is opened by depression of a finger grip 18 connected to one arm 14 of a lever the other arm 13 of which engages the valve stem 3, is held open by a metallic rod 9 when the latter has been heated by the burner, and is closed by a spring 4 on contraction of the rod 9 when the burner is extinguished. The finger grip 18 is associated with a spring-loaded dashpot 17 so that when the burner is being ignited the valve member is prevented from closing for a period sufficient to enable the rod 9 to become heated.
Patent GB-1171737-A (GB)
Title: Process for the preparation of Isoindoline
Inventor: DAUTH CHRISTOPH
IPC: C07D209/44
Filed: 1968-08-27
Abstract: 1,171,737. Isoindoline. ARZNEIMITTELWERK DRESDEN VEB. 27 Aug., 1968, No. 40844/68. Heading C2C. Isoindoline is prepared by reacting an ohalomethylbenzylaminomethane-sulphonic acid of the general formula in which X is chlorine or bromine, with hydrochloric or hydrobromic acid at elevated temperature, evaporating the resulting solution to dryness under reduced pressure, mixing the residue from the evaporation with ethanol and again evaporating to dryness to give an o-halomethylbenzylamine of the general formula which is subjected to ring closure in an organic solvent at 45-90‹ C. in the presence of a base to give isoindoline. The solution of isoindoline obtained is evaporated or, if an aprotic solvent is used, the precipitate is filtered off, the evaporation residue or precipitate is then mixed with a solution of sodium hydroxide, the alkaline solution is then extracted with ether, benzene or toluene and the extract, after drying over anhydrous sodium sulphate, is distilled first at atmospheric pressure and then under reduced pressure in an atmosphere of nitrogen.
Patent GB-1362447-A (GB)
Title: Production of polyesters
IPC: C08G63/00
Filed: 1972-09-04
Abstract: 1362447 Paraoxybenzoyl polyesters SUMITOMO CHEMICAL CO Ltd 4 Sept 1972 [4 Sept 1971] 41001/72 Heading C3R Polyesters are produced by condensing a monomer of the formula in which R is hydrogen, C 1-6  alkyl, C 7-10  aralkyl or C 6-10  aryl and X is a halogen, in the absence of a catalyst under heating. The condensation may be carried out at 100‹ to 450‹ C. and may be solid phase condensation or condensation in an organic heat transfer medium, e.g. aromatic hydrocarbons, chlorinated hydrocarbons or aromatic ethers. The examples describe preparing polyesters from 4-(N-phenylcarbamyloxy)benzoic acid chloride, 4-(N-isopropylcarbamyloxy)benzoic acid chloride and 4-(N- benzylcarbamyloxy)benzoic acid chloride.
Patent GB-979268-A (GB)
Title: Purification of cyclohexanol
Inventor: MATHER JOSEPH GLENDINNING
IPC: B01J41/04
Filed: 1962-10-31
Abstract: Phenolic impurities are removed from cyclohexanol by contacting the cyclohexanol with a strongly basic ion-exchange resin, e.g. a resin sold under the Registered Trade Mark "Amberlite" or "De-Acidite". The process may be effected by passing the cyclohexanol over or through a bed of the resin at a temperature not above 60 DEG C.  The cyclohexanol may contain a little water, e.g. 5%. When the resin is exhausted it may be regenerated by treatment with an aqueous solution of an alkali-metal hydroxide. An example is given.
Patent GB-1429978-A (GB)
Title: Apparatus and method for bar code printing
Inventor: DUFFIELD P
IPC: B41J2/02
Filed: 1973-09-03
Abstract: 1429978 Ink droplet printers MEAD CORP 3 Sept 1973 [18 Sept 1972] 41282/73 Heading B6F Apparatus for printing bar codes comprises a manifold generating a curtain of ink droplets 16a, 16b, a charging electrode 30 common to a plurality of streams of droplets, and means for catching unwanted droplets. The droplet streams may be in two groups, one group forming short timing bars 25 and the other elongating selected bars 24. A charging electrode 30 is provided for each group of streams.
Patent GB-1336507-A (GB)
Title: Fastener-driving tools
IPC: B25C1/14
Filed: 1971-09-03
Abstract: 1336507 Explosively actuated fastener driving tools OLIN CORP 3 Sept 1971 [7 Dec 1970] 41286/71 Heading B4C An explosively actuated fastener driving tool comprises a fastener driving piston 72 slidably mounted in a barrel 50, the piston having a head portion 74 provided with an axial groove 84 whereby explosive gases may, upon firing an explosive charge or cartridge 58, pass into the chamber defined by the piston, barrel and a sleeve 90, within the barrel so as to reduce recoil of the tool. The sleeve 90 includes a flange 92 secured between a muzzle portion 60 of the barrel and the main barrel portion 52. The barrel is movable relative to housing 4 between limits defined by the breech block 16 on the one hand and a spring biased pawl member 104 and the rear end of slot 100 on the other hand. In use application of the tool to a work surface causes rearward movement of the barrel relative to the housing and cocking of a trigger actuated firing mechanism 10. Spring 122 assists in locating a fastener to be fired. The piston head may include a circumferential groove 81 which receives a C-shaped seal. The seal is so positioned that groove 84 is not obstructed. Should the barrel recoil at the end of the driving stroke tapered surface 78 on the piston will abut tapered surface 80 of the muzzle portion of the barrel.
Patent GB-1527893-A (GB)
Title: Automatic label feeder associated with a winding machine
IPC: B65B11/04
Filed: 1975-10-14
Abstract: 1527893 Interwinding webs SCAL SOC DE CONDITIONNEMENTS EN ALUMINIUM 14 Oct 1975 [16 Oct 1974] 41977/75 Heading B8R A machine for interwinding a predetermined length of a web 1 with a shorter length of a strip 9, e.g. a label, advertising or instruction strip, comprises a winding unit 6 preceded by a pair of feed rollers 5 and a label dispenser 8 associated with a continuously driven pressure roller 11 which upon a signal produced by a control circuit associated with the winding unit 6, causes the pressure roller 12 to move into contact with an idler roller 11. Rollers 11, 12 feed the strip 9 through a guide 13, 14 into an overlying relationship with the web 1, the feeding being tripped by a further signal when the strip 9 is engaged by the nip of the rollers 5. When a predetermined length of the web 1 has been fed to the web winding unit 6 a further signal generated by the control circuit trips a cutter 4. The trailing edge of the strip 9 may be provided with an adhesive tab dispensed from a unit 16 to attach the trailing end of the web to the roll.
Patent GB-940347-A (GB)
Title: Improvements in vehicles and transmission systems therefor
Inventor: KOWALSKI JULIAN
IPC: F16H37/00
Filed: 1960-12-06
Abstract: 940,347. Motor vehicle driving gear. RANSOMES, SIMS & JEFFERIES Ltd. March 6, 1962 [Dec. 6, 1960], No. 41995/60. Heading B7H. [Also in Division F2] In a driving and steering mechanism for a motor vehicle having endless tracks or wheels disposed on opposite sides of the vehicle each driven through a planetary gear, a first input member of each planetary gear is driven by the vehicle engine at a speed bearing constant relation to the engine speed and a second input member of each planetary gear is driven by the engine through a continuously-variable changespeed device. As shown each endless track sprocket 14 is driven through gearing 13 by an output shaft 10 integral with the carrier 9 of planet pinions 11 meshing with an annulus 1 driven through gears 3, 4 by a shaft 5 carrying a pulley 6 coupled by a V-belt 7 to the engine crank-shaft. The planet pinions 11 also mesh with a sun wheel 16 carried by a shaft 15 driven through expanding pulleys 17, 18 and a belt 19 from a shaft 25 carrying a gear 26 driven by a gear 27 meshing with the gear 3. To vary the transmission ratio or to reverse the vehicle by simultaneously adjusting the driving ratios of both sets of the pulleys 17, 18 in the same sense a handle 32 (Fig. 3) on the steering column 34 in connected through a pinion 35 and racks 36, 38 to a pinion 39 carrying oppositely threaded elements 40 co-operating with nut members 41 engaging the adjustable plates 30 of the pulleys 18. To vary the driving ratios of the pulleys 17, 18 differentially for steering purposes a steering shaft 37 within the column 34 carries a pinion 43 engaging a rack 44 which displaces the pinion 39 and both nut members 41 axially in the same direction. A pulley 8 is mounted on the shaft 5 for driving auxiliary equipment. In another embodiment each planetary gear is a bevel differential and the adjustment of the expanding pulleys driving the second input member of each differential is effected by a wedge member eccentrically mounted on the steering shaft so that axial displacement of the steering shaft adjusts the drive ratio of the pulleys simultaneously in the same sense and rotation of the steering shaft effects differential adjustment of the drive ratio for steering. Alternatively the expanding pulley drives may be under individual manual control.