baber/WOPTO huggingface dataset:
Patent GB-1500708-A (GB)
Title: Surface cladding units
IPC: E04F13/08
Filed: 1975-11-26
Abstract: 1500708 Forming a brick &c panel IBSTOCK BUILDING PRODUCTS Ltd 26 Nov 1975 [27 Nov 1974] 51336/74 Heading B5A [Also in Divisions E1-E2] Bricks, tiles, stones &c. 26 (Fig. 2) are placed on a network of resilient material strips 24 and spacers 28 arranged on a mould base 4 and surrounded and clamped by a frame 22. Suction is applied through apertures 8 in the base 4 to hold the bricks &c., and frame 22 in position, the frame 22 is unclamped, and a mortar is fed into gaps between the bricks, and over their upper surfaces, and distributed by vibrations. The base 4 on a support 10 is pivoted about an axis 16 to a vertical position (Fig. 3) whereat the suction is released, and the frame 22 and interconnected bricks &c. are transferred to a support rack 20. The bricks &c. may be non- rectangular and coloured, and are interconnected by a mixture of sand, Portland cement, a polyvinylidene chloride copolymer and water, with a backing layer of this mixture embedding sheet reinforcement. The resilient strips 24 comprise closed-cell neoprene sponge that produces concavities in the mortar. The suction effect is increased by temporarily covering the bricks &c. with an impervious plastics sheet.
Patent GB-1529460-A (GB)
Title: Control system for an electric traction motor
IPC: H02P7/29
Filed: 1975-12-19
Abstract: 1529460 Control of DC motors GENERAL ELECTRIC CO 19 Dec 1975 [20 Dec 1974] 52126/75 Heading H2J In a D.C. traction motor control system in which the braking torque of the motor during plugging is controlled by limiting the armature current to a reference level by comparison of the armature current with a reference voltage, the reference voltage is applied as a ramp function during operation of the motor in the plugging mode. As shown, the motor 12, 16 is supplied by a battery 10 via a thyristor circuit 20 under control of a gating control circuit 22 and a controlled acceleration circuit 26. The circuit 26 receives inputs from an operator control 24 and a current limit circuit 30 which receives a signal from a resistive shunt 14 representing the actual armature current. The circuit 30 includes a pair of comparators 32, 34 and the circuit 26 responds to the lower of the outputs of the comparators. During normal forward running, the comparator 34 output is clamped to a high level and the armature current is limited to the reference level of the comparator 32. If the contactors are now reversed by means of switch 21 to brake the motor, a plug logic circuit 54 provides a high output to the circuit 30 and to close a switch 50. The comparator 32 output is then clamped to a high level, and the armature current is limited to the reference level of the comparator 34. This reference is derived from an integrating network 46, 48, 52 which supplies a ramp voltage to comparator 34 when switch 50 is closed. It is stated that this eliminates "ragging" caused by suddenly applied braking current limit signals which produce overshoot of armature current. The integrating network may be replaced by a solid state integrator, e.g. an operational amplifier with capacitor feedback. The circuit 30 may comprise a single comparator with appropriate gating circuits to control the respective reference voltages.
Patent GB-1061800-A (GB)
Title: Improvements in or relating to the manufacture of hexahydrobenzoic acid
IPC: B01J19/14
Filed: 1964-12-23
Abstract: Hexahydrobenzoic acid is produced by contacting benzoic acid and hydrogen with a ruthenium catalyst in the presence of water in an amount of at least 5% by weight based on the benzoic acid, at a reaction temperature of from 50 DEG  to 220 DEG  C. and a pressure of 500-10,000 p.s.i.g.  The process may be carried out continuously and, if desired, in two reactors in parallel.
Patent GB-1235533-A (GB)
Title: Novel 3,5-seco-a-nor-estr-9-ene-2,5-diones, and processes for their preparation
IPC: C07C62/38
Filed: 1968-05-23
Abstract: 1,235,533. 3,5 - Seco - A - nor - estr - 9 - ene- 2,5-diones. ROUSSEL-UCLAF. 23 May, 1968 [29 May, 1967; 23 Aug., 1967], No. 52355/70. Divided out of 1,235,532. Heading C2C. Novel compounds of the formula (wherein OR is a free, esterified or etherified hydroxy] group; and R<SP>2</SP> is an alkyl group) are prepared by condensing appropriate alkyl γ- halo-#-alkoxy-crotonates with compounds of the formula (wherein A is alkyl, alkenyl or aralkyl and B is alkyl, or NAB is a heterocycle). Preferably, the condensation is effected in an aprotic solvent and in the presence of an alklai metal iodide.
Patent GB-1400992-A (GB)
Title: Method and apparatus for reducing warping of tubular conveyor rolls
IPC: F27D3/02
Filed: 1972-07-04
Abstract: 1400992 Conveying glass ribbon LIBBEYOWENS-FORD CO 4 July 1972 [19 July 1971] 52384/74 Divided out of 1400190 Heading C1M In a roller conveyer for conveying a glass ribbon through an annealing lehr, warping of the rolls is prevented by continuously directing a vapourizable liquid against the interior wall of each of the rolls while the wall is at a temperature above the vapourization temperature of the liquid. Each roll is open or at least one of its ends and has a pipe extending into the roll from which liquid drips on to the wall. Preferably the liquid is water.
Patent GB-1111806-A (GB)
Title: Improvements in or relating to radio receiving arrangements employing a fine-tuning motor
IPC: H03J7/16
Filed: 1965-12-10
Abstract: 1,111,806. Automatic frequency control systems. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 10 Dec., 1965 [12 Dec., 1964], No. 52554/65. Heading H3A. In an automatic tuning arrangement comprising a tuning device which is mechanically moved by a motor, under control of a detuning quantity derived from a frequency discriminator, the control circuit is provided with positive feedback, of coupling factor greater than unity, a threshold being provided, when the detuning is small, at which the feedback is interrupted. This ensures that the tuning is rapidly corrected if the error is at all appreciable. A control voltage from discriminator 1 is fed via resistors 15, 16, 17 to two amplifiers comprising complementary transistors 18, 19 direct coupled to output transistors 22, 23 respectively, which feed tuning motor 29 via compensating resistors 26, 28 respectively. According to the polarity of the control voltage one or the other of the amplifiers is energized, but delay diodes 24, 25 in the emitter circuits of the output transistors 22, 23 respectively, cause the output to remain zero until a threshold is reached. Positive feedback over capacitors 36 or 37 and a corresponding series diode 34, 35 which restricts the sign of the feedback then causes a rapid build up of output and an enhanced initial energization of the motor 29. The rate of energization is determined by capacitors 38, 39 shunting the output circuits of transistors 22, 23 respectively. Diodes 40, 41 shunting the inputs to transistors 18, 19 respectively and each poled in opposite sense to the corresponding transistor input, adjust in conjunction with resistors 16, 17 respectively, the control signal level at which the motor 29 will run continuously after the positive feedback has ceased. In an alternative arrangement (Fig. 2, not shown) capacitors are not provided to apply positive feedback to the amplifiers; instead the outputs are fed to a varactor diode so as to initially increase the tuning error and so ensure a large value error and strong energization of the tuning motor. This arrangement provides a final fine tuning after movement of the motor has ceased.
Patent GB-1390659-A (GB)
Title: Switching matrix for realizing at least one logical function
IPC: H03K19/177
Filed: 1972-11-15
Abstract: 1390659 Logic circuits COMMISSARIAT A L'ENERGIE ATOMIQUE 15 Nov 1972 [16 Nov 1971] 52662/72 Heading G4H A matrix for enabling logical functions to be formed comprises an array of switching circuits 11-45 which are identical and are each provided with input terminals C, E and output terminals L, S, each circuit having its input terminal C coupled to the output terminal L of the preceding circuit which is located in the same line and its output terminal L coupled to the input terminal C of the following circuit which is located in the same line, the input terminals C of the circuits in the first column being connected to ground and each circuit satisfying the logical relations: S=EÀC and L = S wherein S, E and L denote the logical values and C, S the complements of the logical values applied to the terminals. Each circuit comprises a pair of transistors 2, 7 the bases of which are connected to a voltage source V via Zener diodes 4, 8 and resistors 6, 9. By suitably connecting the terminals L, E, S of certain of the circuits in the matrix logical functions including "OR", "AND", exclusive "OR" and combinations of these functions may be formed. The matrix may be used to control and regulate temperature, pressure, or flow rate, or operate valves in industrial processes.
Patent GB-1094970-A (GB)
Title: Improvements in ball and socket joints
IPC: F16C11/06
Filed: 1966-11-25
Abstract: 1,094,970. Ball and socket joints; metal castings. V. LANGEN [trading as A. EHRENREICH & CIE]. Nov. 25, 1966 [Nov. 27, 1965], No. 52778/66. Heading E2F. In a ball and socket joint, at least one of the bearing members is formed as a high grade metal casting, the metal being grey cast iron, aluminium, or aluminium bronze. The preferred metal is spheroidal cast iron containing spheroidal graphite which provides a lubricating action: the cast iron may be hardened e.g. by induction hardening, case hardening or quenching, after casting, or during casting may be alloyed with chromium, magnesium or molybdenum with subsequent inoculation treatment with silicon; the bearing surface may then be hardened by quenching. Aluminium and aluminium bronze may be hardened by precipitation hardening. One form taken by the invention is that of a ball and socket joint to which traction stress in a direction 9 may be applied, comprising a housing I with a pin aperture at one end and closed by an expanded-in lid 8 at the other end. A joint pin,: having a head 6, rotatably passes through a ball element 3 which element is made of grey cast iron, preferably spherical cast iron. The head 6 has an annular shoulder 4 abutting against a flat face 5 on the ball element, the spherical face of the latter being brought into sliding relation with the lower inner face of the housing by an insert 7, of rubber or polyurethane which is pressed against the spheroidal face of the head 6 by the lid 8; the joint pin can thus both rock and rotate relative to the housing. Another form comprises a part ball element  10 on which is mounted by means of a spigot 12 a second part ball element 11 of cast iron, aluminium or aluminium bronze. The invention also includes a ball and socket joint wherein the housing has an interior bearing cap cast from one of the said metals, and a joint comprising a ball member carrying two diametrically opposed joint pins, the ball bearing against a bearing liner cast from one of these metals and lining the housing.
Patent GB-1466150-A (GB)
Title: Process for removing metal ion from aqueous solution
IPC: B01D61/58
Filed: 1974-12-06
Abstract: 1466150 Ultrafiltration MITSUBISHI RAYON CO Ltd 6 Dec 1974 [8 Dec 1973] 52980/74 Heading B1X A process for removing and recovering a metal ion or ions from water containing them comprises incorporating a polymeric material or materials soluble in or swellable with water and capable of being chemically or physically bonded with the metal ion or ions into an aqueous solution containing the metal ion or ions thereby forming a chemical or physical bond therebetween and then forcing the aqueous solution under pressure through a membrane selectively permeable to water but not permeable to the polymeric material. The metals Cu, Zn, Pb, Cd, Hg, Ag, Cr, Co, Ni, Mn, As, Li, K, and Na are mentioned. Many suitable polymers are listed. The membrane may be of cellulose acetate or a synthetic polymer; it may comprise hollow fibre material.
Patent GB-1091302-A (GB)
Title: Gas-blast circuit breaker
IPC: H01H33/90
Filed: 1965-12-14
Abstract: 1,091,302. Gas blast switches. WESTING- HOUSE ELECTRIC CORPORATION. Dec. 14, 1965 [Dec. 21, 1964], No. 53010/65. Heading H2B. In a puffer-type gas blast circuit breaker the blast gas is compressed during opening of the contacts between two members 23, 24 one of which moves in the same direction as the movable contact assembly 25 while the other moves in the opposite direction. A main piston 23 is attached to the movable contact 25 and to an operating rod 27 rigid with an isolator contact 19. The secondary piston 24 is slidable along the rod 27 and both pistons move within a fixed cylinder 17 the main piston 23 being biased downwards by a heavy spring 21 while the secondary piston 24 is biased upwards by a lighter spring 28. Piston 24 is normally held down by latches 42. Two of the assemblies shown are mounted in a tank filled with SF 6 , air, &c. (Fig. 1, not shown), their two isolator contacts 19 being bridged by a movable isolating contact (13). In the closed position the contact (13) acts to hold piston 23 and contact assembly 25 in the position shown against spring 21. To open the breaker contact (13) is moved downwards; spring 21 drives contact 19 downwards causing hooks 49 thereon to withdraw latches 49 and allowing piston 24 to move upwards. Hooks 49 free themselves from the latch mechanism and piston 23 continues downwards. Rising pressure between the pistons 23, 24 eventually exceeds the force of spring 28 and piston 24 changes direction and is driven back downwards into the latched position. The pistons are damped by rising pressure beneath piston 24. The contacts are reclosed by raising contact (13) and rod 27 again, valves 51, 55 permitting gas to flow in rapidly. In a modification (Fig. 5, not shown) the fixed contact 22 of the breaker is hollow and the blast gas flows through it; an arcing electrode 34 (Fig. 4, not shown) may also be hollow. In a further modification (Fig. 7, not shown) the valves 51, 55 are omitted and the damping action does not occur. In an alternative arrangement (Fig. 6, not shown) the cylinder (17<SP>1</SP>) is movable with the movable contact 25 while piston 24 is moved in the opposite direction by springs. The cylinder is moved by a crank 83 which may be operated pneumatically and is latched in the contact's closed position. Current transformers (76-78) may surround the tank (71).
Patent GB-1528027-A (GB)
Title: Method of manufacturing integrated injection logic semiconductor devices
IPC: H01L21/8226
Filed: 1975-12-29
Abstract: 1528027 Manufacture of I<SP>2</SP>L devices TOKYO SHIBAURA ELECTRIC CO Ltd 29 Dec 1975 [27 Dec 1974 (4)] 53012/75 Heading H1K The zone structure of an integrated injection logic device, such as shown in section in Fig. 1H, consisting of a lateral transistor with emitter 118, base 116 and collector 112 supplying base current to the inverted vertical transistor comprised of emitter 111, base 112 collector 122, and base contact region 119, is formed by introduction of dopants through three apertures formed in an insulating layer disposed over a layer of one conductivity type on a layer or body of opposite type. The insulating layer 113 is typically silica grown thermally or vapour deposited on a boron doped epitaxial or diffused layer 112. In one process a first frame-like aperture is initially formed, phosphorus-doped silica deposited overall and heated to diffuse phosphorus down to the substrate 111 to form zone 116. After removal of the doped oxide by a selective etchant a second aperture is formed in layer 113 and boron diffused into both apertures from boron trioxide to form P zones 118 and 119 and block the apertures with oxide. A new aperture is then formed in layer 113 and phosphorus diffused in from the pentoxide to form zone 122. Aluminium contacts 124-126 are then provided conventionally. In one application of this process (modified by retention of the doped oxide except in the first aperture) region 116 forms part of a rectangular grid pattern in each interstice of which a similar I<SP>2</SP>L structure is formed. In an alternative process the first and second apertures are simultaneously formed at the outset and the second masked with silicon nitride during formation of zone 116 and removal of the phosphorus doped oxide. After removal of the nitride the device is completed as above. In another method all three apertures are formed at the outset and the second and third masked with nitride during formation of zone 116. The doped oxide is then removed except from the nitride in the third aperture which it masks during removal of the remaining nitride to expose the second aperture. After the boron diffusion, in which the first and second apertures are filled with oxide, the nitride is removed from the third aperture so that the device can be completed as before.
Patent GB-1194438-A (GB)
Title: A System including a Vehicle Propelled by a Linear Motor
IPC: B60L5/00
Filed: 1968-11-11
Abstract: 1,194,438. Vehicles propelled by linear electric motors; air cushion vehicles. MERLIN GERIN. 11 Nov., 1968 [17 Nov., 1967], No. 53265/68. Headings B7K and B7L. [Also in Divisions H1 and H2] Auxiliary electrical power for heating, lighting, or producing air cushions for lifting and guiding, of a vehicle 18, Fig. 1 (or 28, Fig. 2), propelled along a rail 10 (or 24) by a linear electric induction motor which comprises induction coils 14 and 16 (or 26) in the rail and an armature comprising windings (not shown) and magnetic circuit closure members 20 and 20<SP>1</SP> (or 30) on the vehicle, is supplied to the vehicle from the travelling field produced by the induction coils 14 and 16 (or 26), by providing at least one pick-up coil 22 (or 32) on the armature members 20 and 20<SP>1</SP> (or 30) so that a varying electromotive force is induced in the coil 22 (or 32) which is dependent for its magnitude on the degree of asynchronism between the travelling wave and vehicle; rectifiers and storage batteries are provided to compensate for these variations in the auxiliary power supply.
Patent GB-1357465-A (GB)
Title: Device of means for stopping a double-twisting spindle having a belt drive in a pre-determined position and apparatus having such a device or means
IPC: D01H7/86
Filed: 1972-11-20
Abstract: 1357465 Stopping 2:1 twister PALITEX PROJECT-CO GmbH 20 Nov 1972 [29 Nov 1971] 53623/72 Heading DID [Also in Division F2] A 2:1 twister is stopped in a predetermined position by a brake shoe 36 which is pneumatically moved against a braking surface 26 of the spindle, and which has a compressed air passage opening out onto the braking surface of the brake shoe, and which is arranged to communicate with a thread passage duct 28 in the storage disc. A drive belt tensioning roller 6 is moved away from the drive belt during braking so that the drive belt exerts a slight rotating force on the spindle. During braking air flowing through the braking shoe 36 forms an air cushion on the braking surfaces (and the spindle thereby continues to rotate slowly) until the passage to the threadduct 28 communicates with the passage 43 in the brake shoe. Then the air cushion collapses and the spindle is finally braked in that position. Air flowing into the duct in the storage disc creates an air flow used to thread a broken yarn end through the twister. The brake may be actuated upon detection of a broken end or failure of supply of yarn.  The movement of the brake shoe 36 against the spindle may lift the belt tensioning roller off the belt (Fig. 5 not shown). There may be a stationery braking arrangement at each spindle (Figs. 1-5). Alternatively, the braking device may be mounted on a travelling unit which operates its spindle brake as it passes the spindle with a broken end. A thread sensor at each spindle causes a brake operating arm (86) to swing into the path of the travelling brake unit to operate the brake, (Figs. 6-8 not shown). Alternatively, a spindle brake at each spindle may be actuated upon sensing a yarn break, then as a braking unit bands past the spindle the travelling unit is stopped, the first brake is released and a second brake, which allows the spindle to rotate to the predetermined position (as described above), is applied, (Figs. 10-16 not shown).
Patent GB-1430438-A (GB)
Title: Spring construction
IPC: A47C31/06
Filed: 1973-11-19
Abstract: 1430438 Means for attaching springs MORLEY FURNITURE SPRING CORP 19 Nov 1973 53679/73 Heading A4M A clip for attaching a sinuous steel band 10 to a frame rail 11 comprises an L-shaped member 15 having one arm 21 provided with a hook 30 to which the end of the band is connected and the other arm 25 provided with a plurality of tangs 40a-40h and 40k so disposed that no two tangs are in horizontal alignment. A tab 34 punched from the one-arm prevents inadvertent disengagement of the band from clip.
Patent GB-1116710-A (GB)
Title: Motor control system
IPC: H02P7/292
Filed: 1966-12-01
Abstract: 1,116,710. Control of D.C. motors. TEXTRON Inc. 1 Dec., 1966 [29 Dec., 1965], No. 53861/66. Heading H2J. [Also in Division H3] A D.C. motor 20, e.g. of printed circuit, permanent magnet type, for positioning carriages on a machine tool is energized from an A.C. source via back to back thyristors 52, 53, both of which are triggered in respective half cycles but the firing angle of one is advanced with respect to the other to determine direction and speed of operation. The triggering signals are produced by relaxation oscillators coupled by transformers T1, T2, and comprising unijunction transistors 63, 64 which conduct when the voltage on capacitors 70, 71 reaches an appropriate level; the capacitors are charged from a constant current circuit 75 but the rate is modified by a differential transistor amplifier 84, one side of which 86, is connected to earth while the other 85 receives a control signal from a summing circuit 37. This control signal comprises a command signal from a programmer, fed through an operational amplifier 130, with stabilizing feedbacks from a tachometer and a low pass filter 41 receiving armature voltage. Another filter network 110 provides phase correction. The oscillators are synchronized with the A.C. supply by a circuit 150; this provides a ramp voltage to the unijunction transistors which provides a low impedance path to -28 v. at the end of each half cycle.
Patent GB-1092650-A (GB)
Title: Fiber-forming acrylonitrile polymers
IPC: C08F220/46
Filed: 1965-12-20
Abstract: A flame-retardant dyeable interpolymer comprises at least 84% by weight of acrylonitrile, 7 to 12% by weight of vinylidene chloride, 0.25 to 1.0% by weight of sodium p-methallyl-oxybenzene sulphonate, and 3 to 7% of styrene or methyl acrylate.  The polymers are preferably made by redox catalyst systems in aqueous dispersion.
Patent GB-1440568-A (GB)
Title: Mine roof supports
IPC: E21D11/18
Filed: 1972-11-23
Abstract: 1440568 Mine arch support stilts BRITISH STEEL CORP 22 Nov 1973 [23 Nov 1972] 54235/72 Heading E1E A yielding stilt 10 for a mine roof support arch is provided with an elongated slot 13 to position the arch and a series of holes 17 longitudinally aligned therewith to form yielding bridges 19. The stilt is made of steel and the holes are preferably punched therein. In a modification, the stilt is constructed from members of channel section and in a further modification the slots are elongated and arranged with their longitudinal axes transverse to that of the stilt which is re-inforced by plates at its upper end, see Figs. 4 and 5, (not shown), respectively.