baber/WOPTO huggingface dataset:
Patent GB-1309523-A (GB)
Title: Battery charging circuits
IPC: H02J7/14
Filed: 1971-04-27
Abstract: 1309523 Battery charging systems TEXAS INSTRUMENTS Ltd 27 April 1971 11586/71 Heading H2H A system in which a battery is charged from a generator driven by an internal combustion engine by way of a triac is provided with means to protect the system should the battery be connected with the incorrect polarity. A battery 1 is charged from an A.C. generator 6 driven by the engine of a vehicle, a triac 14 being connected in between the battery 1 and the A.C. supply rectified by diodes 8-13. The gate electrode of the triac 14 is connected to the positive side of the battery by a circuit arrangement having a unijunction transistor 15, resistor 16, diode 17 and a switch 18 together with capacitors 20, 21 and a resistor 19. Closure of the switch 18 causes the emitter of the transistor 15 to assume the potential determined by the ratio of the capacities of the capacitors 20, 21 and then to rise slowly as the capacitor 21 is charged and the capacitor 20 discharged, both through the resistor 19. When the emitter potential reaches the threshold value of the transistor 15, the transistor becomes conductive and produces a pulse at the gate electrode of the triac 14. The triac then fires so that current can flow from the battery to the vehicle cicuits such as the ignition circuit 22 and other circuits 24, 28 controlled by switches 23, 25 respectively. The circuit components 20, 21, 19, 15 function to supply pulses repeatedly to the gate of the triac. When the vehicle engine has been started and the generator 6 is generating, the conductor 7 is maintained negative, this current will be able to flow through the triac 14 to charge the battery 1. If the battery 1 is disconnected the triac 14 becomes non-conductive and if the battery is connected incorrectly the capacitor 21 cannot charge because of the diode 17, thus no firing pulses can be produced at the gate of the triac. If the components 24 require to be powered by the battery 1 when the triac is non-conductive a changeover switch 26 may be provided. All the switches 18, 25, 26 may be mechanically ganged. In certain circumstances the switch 23 may be dispensed with.
Patent GB-1310233-A (GB)
Title: Radiation analysers
IPC: G01J3/42
Filed: 1969-04-11
Abstract: 1310233 Photo-electric absorption analysis BP CHEMICALS Ltd 1 April 1970 [11 April 1969] 18630/69 Heading G1A [Also in Division G4] In a double beam absorption analyser in which one beam passes through a liquid or gaseous specimen and the other beam provides a radiation reference Fig. 4 (not shown), the two beams are chopped at the same frequency, but out of phase with one other, by respective electro-or magnetooptical crystals (35, 36) placed between polarizing filters (37-40), the resulting detector output being a complex square wave signal from which is extracted the fundamental alternating waveform, whose phase relative to either of the two chopping frequencies gives a measure of the absorption in the sample. Pulses from a clock pulse generator 1 are supplied, at a rate of about four million pulses per second, to a 12-bit phase counter 2 and a clock gate 3. The output from the most significant bit of the counter is supplied to the first polarizing chopper, which may be a YIG (yttrium iron garnet) crystal 5. The outputs irom eight bits of the counter together with their logical inverses are supplied to a terminal bank A which is connected to a terminal bank B to provide a signal of adjustable phase displacement to the second YIG crystal 7. The output from the most significant bit of the counter also provides, via a start/stop memory 11, a conditioning pulse to the gate 3, whose output initiates operation of the 12-bit output counter 12. The detector 15, which may be a lead sulphide or indium antimonide device, provides an output from which a filter 17 extracts the fundamental sine wave, which in turn provides a trigger pulse, via trigger 18 and monostable circuit 13, to memory 11. The memory provides a first signal to stop the count on counter 12, and a second signal to transfer the count to a register 19. Thus, at the end of each cycle the count indicated on the counter 12 indicates the relative phase shift caused by absorption in the specimen, plus a known phase delay caused by the filter network 16-18. The reset cycle starts when the next leading edge of the direct output of the phase counter 2 occurs, and the number in the register 19 is therefore updated about 1,000 times per second. Alternatively Figs. 2, 2A (not shown), the  start pulse to the first YIG crystal may be delayed using a NAND gate (23). Or Figs.3, 3A (not shown), the counting may be started by a signal derived from the unfiltered detector output via a variable delay monostable circuit (25).
Patent GB-1313297-A (GB)
Title: Methods of boring and boring bars
IPC: B23B51/06
Filed: 1969-05-30
Abstract: 1313297 Boring bars C S HARRIS 19 May 1970 [30 May 1969] 27523/69 Heading B3C A boring bar has a nozzle or orificed member adapted to be mounted to direct a jet of fluid on to a cutting tool. Supply tubes 7 lie in slots 6 formed in a tool holder otherwise as deserbed in Specification 1,313,295 so that high pressure fluid supplied from a tank (not shown) is directed from the orifices 9 to impinge on the clips being removed by the tool cutting edges and break them up or allow them to form as ribbons. An 0-ring 13 seals the sealing ring 10 against the bore. Low pressure flushing fluid produced from the sealing ring 10 and the high pressure fluid from the orifices 9 are combined prior to filtration and recirculation.
Patent GB-1318767-A (GB)
Title: Apparatus for winding cores
IPC: B21F3/04
Filed: 1970-10-13
Abstract: 1318767 Locking toroidal helices L A IVANOV 13 Oct 1970 48522/70 Heading B3E A machine for winding small size toroidal cores comprises a device 17, Fig. 4, for pulling a loop of the wire through the hole 18 in the core 5 and a device 13 for placing the pulled through end of the wire on part-cylindrical elements 3 of a guide 1 on which it is retained, by means 14, Fig. 1. The machine includes a core holder 4 mounted for rotating the core stepwise around its longitudinal axis, a pull-through device 6 operated by a drive 7, and an arm 8 carrying a roller 13 for placing the wire 9 on the elements 3 said arm being connected to a cam 11 on a shaft 10 rotated by the drive 7. Hold-down brushes 14 retain the wire against the elements 3. In operation, the wire from a reel 16 is brought under a hook 17 of the pull-through device 6 which pulls the wire through the hole 18 in the core and forms a loop (19), Fig. 2 (not shown). A shuttle 15 widens the loop and brings it to the roller 13 which, being moved by the arm 8 around the guide 1, takes up the loop and forms a turn 20 around the core. During the further movement of the roller the free end of the wire is pulled through the hole and is placed on the guide ribs and the loop straightened. Then the wire is thrown by a catcher 21 on the hook 17 for the next working stroke and the cycle is repeated. The core 5 is rotated through one step between turns.
Patent GB-1321242-A (GB)
Title: Pitch-checking apparatus
IPC: G01N21/956
Filed: 1969-09-16
Abstract: 1321242 Photo-electric inspection of running webs TIMSONS Ltd 8 Sept 1970 [16 Sept 1969] 45559/69 Heading G1A [Also in Division H3] The spacing of marks on a travelling web W is checked or measured by arranging two photoelectric devices 1-4 at respective inspection stations spaced by a distance equal to the required spacing or a multiple thereof, and comparing the phases of the pulses produced as the marks pass the inspection stations. As shown, light from a filament lamp or gallium arsenide cell 2 is focused through a slit 4 on to a phototransistor 1 placed at the opposite side of the web. Passage of a mark in the form of a hole through the beam produces a pulse from the phototransistor. Alternatively, each phototransistor may be arranged to receive light reflected from opaque marks on the web. Pulses from phototransistor TR1 are amplified and shaped to squarewave format TR2, and the arrival of a square pulse at TR3 renders that transistor conducting and hence voltage V 1  falls below a preset level V z  Fig.4a, (not shown). Pulses from the other photo-transistor are supplied through an identical arrangement TRI-3 to rectifier D2. Thus, if the pulses produced at the two photodetectors overlap, voltages V 1  and V 2  both drop below V z  for an amount of time depending on the extent of this overlap, resulting in current flow through the meter M. The reading on the meter hence indicates any deviations of the spacing of the marks from the required spacing, or may be calibrated to give a direct measure of the spacing. A visible or aural signal may also be produced when a given spacing inaccuracy is detected. The circuitry may also be arranged to effect an adjustment of the web e.g. changing its tension, to remove spacing inaccuracies. By making the detector spacing slightly different from the required spacing, and by setting the meter to give 50% full scale deflection when the marks are spaced "correctly", the direction of deflection indicates whether the mark spacing is greater, or less, than that desired. To prevent the meter showing misleading results if the web stops with a hole under each photo-cell, additional circuitry may be provided between TR3 and D3 to bias off the rectifier D3 in these circumstances, Fig. 5 (not shown).
Patent GB-1323965-A (GB)
Title: Method of producing a lithographic master and sheet for use in the method
Inventor: RITZERFELD G
IPC: B41C1/10
Filed: 1971-08-27
Abstract: 1323965 Imaging printing plates G RITZERFELD 27 Aug 1971 [25 Sept 1970] 40233/71 Heading B6C [Also in Division G2] Lithographic printing plates are imaged with an oleophilic resin released from burst microcapsules carried by sheets in contact with the plates. The microcapsules contain a volatile solvent and the resin, and are caused to burst by local pressure or by imagewise application of heat. The plates may be brushed or electrically roughened aluminium foils, or may be of paper such as baryta paper or be acetate or coated polyester foil. Preferably the microcapsules are 20Á to 50Á in diameter. They may contain a copolymer of vinyl chloride and vinyl isobutyl ether with toluene or xylene. Imaging may be by bursting the microcapsules with a typewriter or by absorption of infra-red radiation by characters on sheets in contact with those carrying the microcapsules.
Patent GB-1328692-A (GB)
Title: Impact crusher
Inventor: WRIGHT HAROLD
IPC: B02C23/12
Filed: 1970-05-29
Abstract: 1328692 Impact pulverizers BRITISH IRON & STEEL RESEARCH ASSOCIATION 28 May 1971 [29 May 1970] 26138/70 Heading B2A A comminuting apparatus comprises a conveyor belt 24 Fig. 3 to throw a jet of particles at a target 27, which is inclined to the direction of the jet. The comminuted particles and remaining uncomminuted particles are removed from the target surface continuously. Material is supplied at 21 to a hopper 22 and discharged at speeds from 20 to 100 ft/sec from the belt 24, which is driven by pulleys 25. The target 27 is adjustable. Alternatively a fixed curved, straight or scalloped target Fig. 2 may be used. The particles are sized at 52, oversize being recycled on line 53. Undersize is screened and rejected at 55, the product leaving at 56. In the embodiment of Fig. 3 the angle of the target 27 is adjustable by means of a screw 43, Fig. 4, which is arranged in a pivotable mounting and by adjustment of a rod 35 which is locked by a clamp 36.
Patent GB-1331512-A (GB)
Title: Constant voltage regulators
IPC: G05F1/44
Filed: 1970-01-28
Abstract: 1331512 Automatic voltage control THORN AUTOMATION Ltd 13 Jan 1971 [28 Jan 1970] 4165/70 Heading G3R [Also in Division H3] A regulator for maintaining a constant voltage at output terminals 4, 4 supplied, via input terminals 2, 2, by an alternating voltage or a uni-directional periodic voltage having a zero potential in each period, comprises an impedance 6 which limits the current in each half cycle or period until a Triac T5 is fired to short circuit the terminals 4, 4 for the remainder of that half cycle or period, the Triac being fired when the time integral of the output voltage, taken from the zero condition at the start of the half cycle or period, reaches a predetermined magnitude. The firing circuit 8 for the Triac is shown in Fig.2 and comprises a full wave rectifier D1---D4 whose voltage is integrated by an RC circuit RV 1 , R1 and C1, the voltage across the latter being applied to the base of a transistor T2 whose emitter receives a voltage from a resistor Zener diode chain R3, ZD1 representative of the predetermined magnitude. When the voltage of capacitor C1 reaches this magnitude, transistor T2 conducts to cause transistors T3, T4 of a regenerative switch arrangement to conduct. Initially the current therethrough passes through a capacitor C2 until voltage build-up thereon diverts the current through a Zener diode ZD2. The current divides through a resistor R6 and the primary winding of a transformer TR1 whose secondary winding produces a pulse which fires the Triac T5. The current also causes a transistor T1 to conduct to discharge the capacitor C1. To ensure there is a sufficiently low impedance voltage source for the above operations to occur, even towards the end of a half cycle or period with diminishing voltage, a capacitor C3 is connected across the switch arrangement T3, T4 and is charged during each half cycle or period from divider R7, R8, D6 to a voltage limited by a Zener diode ZD3. When the voltage across terminals A, B has reduced sufficiently for a diode D5 to be forward biased, the capacitor C3 discharges through this diode and the parallel path of resistor R4 and emitter-base junction of a transistor T3 until it reaches a voltage lower than that on the capacitor C2, whereupon the switch T3, T4 turns off. If the output voltage is not high enough to cause the capacitor C1 to charge sufficiently to trigger the Triac, when capacitor C3 begins to discharge through members R4, D5 the volt drop across R4 biases the transistor T3 to cause the switch T3, T4 to conduct, so firing the Triac and turning on transistor T1 to discharge the capacitor C1. As before switch T3, T4 turns off when the voltage of capacitor C3 falls below that of C2. Triac T5 may be replaced by a pair of anti-parallel connected controlled rectifiers.
Patent GB-1331905-A (GB)
Title: Projection screen
IPC: G03B21/60
Filed: 1972-02-24
Abstract: 1331905 Projection screen PENTACON DRESDEN KAMERA-UND KINOWERKE VEB 24 Feb 1972 8639/72 Heading G2A A projection screen comprises a reflecting foil and a transparent layer laminated thereon, the reflecting foil having a diffusedly reflecting aluminium coating and the transparent layer is facing a projection source being provided with transparent uniformly shaped discrete projections. The reflecting foil may be of aluminium and have a flexible or rigid backing consisting of PVC-coated paper or PVC-coated fabric. The projections may be thermoplastic pyramids, cones or plano convex or concave lenses and their shape is determined by a general formula. The screen may be curved, which curvature may be adjusted, the centre of curvature being at the projecting light source. A linearly polarized light beam may be used for stereo projection purposes.
Patent GB-1334711-A (GB)
Title: Treatment of oxide pigments
IPC: C08K9/04
Filed: 1971-04-19
Abstract: 1334711 Polylactone coated titanium dioxide LAPORTE INDUSTRIES Ltd 19 April 1971 [13 March 1970] 12300/70 Heading C3R [Also in Division C1] A composition comprises 0À1-60% by wt. of polylactone and TiO 2 . The polylactone may have the formula R[(-O-CO-R<SP>1</SP>-) n -OH] p  and be produced by reacting the lactone -O-CO-R<SP>1</SP>- with the polyol R(OH) p  in the presence of a catalyst. n may be 2-300 and p may be 2-8. R is an aliphatic hydrocarbon group, saturated or unsaturated, which may have a heteroatom, e.g. oxygen, in the carbon chain. R<SP>1</SP> is an aliphatic hydrocarbon group having a straight chain of 4-12 C atoms which may be substituted with one or more alkyl groups, e.g. methyl. Suitable lactones, polyols, and catalysts are listed. In Example 3, TiO 2  is treated with 28%, 38%, and 49% of a polycaprolactone of M.Wt. 8000.
Patent GB-1339722-A (GB)
Title: Flexible hose
IPC: F16L11/08
Filed: 1970-01-14
Abstract: 1339722 Flexible hoses; pipe couplings DUNLOP HOLDINGS Ltd 12 Jan 1971 [14 Jan 1970 10 June 1970] 1758/70 and 28111/70 Headings F2P and F2G A method of manufacturing a hose comprises forming rings 10 of filament reinforced resinous material around at least a reinforcing layer of the hose, the resinous material incorporating a catalyst which only acts at temperatures above about 100‹ C. so that curing of the resinous material occurs solely when the hose assembly is vulcanized. In the embodiment shown the resinous rings are formed by winding polyester or epoxy resin impregnated glass fibre rovings into a channel section ring 11 of aluminium alloy. The ring 11 may be of several sections secured to the hose by a steel retaining strip 9. The hose comprises an inner lining of elastomeric material 1, preferably rubber, reinforcing layers of textile or steel wire cord 6, 7, an elastomeric filler 13 in the spaces between the rings and outer breaker plies and covering layers 14 to 16. To produce a buoyant hose the filler 13 is preferably a microcellular sponge, and additional buoyancy may be provided (Fig. 2, not shown) by further layers of sponge (21) beneath the outer covering layer. Pipe couplings.-The hose may be provided with end fittings, Fig. 3, each fitting comprising a flange 22 and nipple 23 with peripheral ribs 24, steel wires being wound round each reinforcing layer 6, 7 in the spaces between the ribs 24 to secure the hose to the fitting.
Patent GB-1340332-A (GB)
Title: Cartridge fuses
IPC: H01H69/02
Filed: 1971-04-21
Abstract: 1340332 Fusible cut outs JOSEPH LUCAS (INDUSTRIES) Ltd 21 April 1971 [2 May 1970] 21203/70 Heading H2G A fuse is made from a rod of electrically insulating material 11 (e.g. ceramic) and a layer of conducting ink printed or rolled on it, the layer having a pair of circumferential end portions 12 interconnected by a fuse portion 14. The ink is bonded to the rod, so forming the conductive layer, by a firing process. The ink may be a silver conducting ink.
Patent GB-1347976-A (GB)
Title: Anti-skid braking systems
IPC: B60T8/1761
Filed: 1971-07-23
Abstract: 1347976 Antiskid braking systems GIRLING Ltd 23 July 1971 [9 Sept 1970] 43116/70 Heading F2F In an antiskid braking system for a vehicle wheel speed, tachogenerators 11, 12 feed signals to frequency-to-voltage converters 13, 14 the outputs of which pass to a switch 15 which emits a signal to the remainder of the circuit of the signal from the slowest rotating wheel and two differentiating circuits producing signals responsive respectively to deceleration and acceleration receive the signal from switch 15 to relieve and apply the brakes through valve 64. The first differentiating circuit includes a PNP transistor 18 having its emitter connected through a capacitor 16 to switch 15 and is further connected through a diode 19 to a positive supply line 21, to a negative line 25 through resistor 26 and diode 27 and to the base of an NPN transistor 28. When the brakes are applied the first differentiating circuit produces at the emitter of transistor 28 a signal representing deceleration which is fed by way of a diode 35 to amplifier 56, 62 which forces current to flow in valve 64. As deceleration increases more current flows in valve 64 so that the braking effort is relieved. The second differentiating circuit comprises a capacitor 17 and NPN transistor 36 the collector of which is connected to the base of an NPN transistor having its collector connected to a further positive supply line 32 and its emitter connected to the base of an NPN transistor 26. As the braking effort is relieved the second differentiating circuit produces an output at the emitter of a transistor 46 representative of wheel acceleration which is amplified and inverted by an amplifier 49 provided with negative feedback through a resistor 54 and also applied to amplifier 56, 62. A signal now appears through a diode 34 to control amplifier 56, 62 and cause current to flow through valve 64. Because of the signal inversion greater acceleration produces a greater signal through diode 34. Capacitors 22, 23 counteract temperature variations.
Patent GB-1350388-A (GB)
Title: Controlling brakes
IPC: B60T8/18
Filed: 1970-08-26
Abstract: 1350388 Load responsive control of fluid pressure brakes BENDIX WESTINGHOUSE Ltd 28 May 1971 [26 Aug 1970] 40962/70 Heading F2F In a spring-applied fluid pressure releasable brake system for a vehicle or tractor-trailer arrangement having a first axle whose loading with variation of vehicle load varies more than that of a second axle, the braking effort on the first axle initially increases with increased applied effort but thereafter is reduced with further increase of applied effort. A reservoir 1 for compressed air is connected to a control valve 2 which has an output conduit 21 connected to two relay valves 3 and 4 of which valve 3 is an inverse valve and the brake cylinder 7 is connected to the outputs of the valves via a double check valve 6 and a load-responsive valve 5 so that as pressure in a conduit 61 falls with increase in control movement the spring applies the brake until the rise of pressure in conduit 51 takes over and by opposing the spring decreases the braking effort.
Patent ID-26785-A (ID)
Inventor: NIKOLOVSKI NIKOLCO S
IPC: B22D11/00
Filed: 2000-02-04
Abstract: In twin roll casting of steel strip, molten steel is introduced into the nip 16B between parallel casting rolls (16) to create casting pool (30) supported on casting surfaces (16A) of the rolls and the rolls are rotated to deliver solidified strip (20) downwardly from the nip. Casting surfaces (16A) are textured by a random pattern of discrete projections having pointed peaks and the strip is moved away from the casting pool at a speed of more than 60 meters per minute. In order to suppress chatter defects, the molten steel has a manganese content of less than 0.6% by weight and a silicon content in the range of 0.1 to 0.35% by weight. The random texture may be produced by grit blasting the casting surfaces on a substrate covered by a protective coating. Alternatively the texture may be produced by chemical deposition or electrodeposition of a coating onto a substrate to form the casting surfaces. <IMAGE>
Patent ID-24139-A (ID)
Inventor: KOCIAN HARVEY GENE
IPC: C08F2/00
Filed: 1998-07-30
Abstract: The present invention teaches a process for controlling a continuous gas phase (exothermic) process operating in condensing mode (e.g. polymerization) with a selected temperature for the reactor bed or outlet and with a temperature differential between the reactor inlet and the reactor bed or outlet by controlling the heat transfer provided by the heat exchanger in the recycle line to maintain the selected reactor bed temperature or outlet temperature while simultaneously controlling a condensable liquid feed rate to maintain the temperature differential.
Patent IL-103223-A (IL)
Title: Glial-cell derived neurotrophic factor (gdnf), nucleic acid molecules encoding gdnf and methods and compositions for their use
IPC: C07K16/00
Filed: 1992-09-18
Abstract: A novel neurotrophic factor referred to as glial derived neurotrophic factor (GDNF) has been identified and isolated from serum free growth conditioned medium of B49 glioblastoma cells. Rat and human genes encoding GDNF have been cloned and sequenced. A gene enconding GDNF has been subcloned into a vector, and the vector has been used to transform a host cell in order to produce biologically active GDNF in a recombinant DNA process. <IMAGE>