baber/WOPTO huggingface dataset:
Patent GB-1529393-A (GB)
Title: Turntable speed control system
IPC: G05D13/62
Filed: 1976-02-26
Abstract: 1529393 Automatic control of speed R C A CORPORATION 26 Feb 1976 [17 March 1975] 07672/76 Heading G3R In a speed control system for a turn-table, e.g. for a video disc, pulses at a frequency proportional to actual turn-table speed and independent of the turn-table pick-up are phase compared with a generally sawtooth reference frequency. The result is used to control an adjusting device (e.g. a turntable brake) coupled to the turn-table drive, so as to regulate the turn-table speed to a desired value. The free running speed of the turn-table is greater than the desired value. As shown, a synchronous a.c. motor 13 drives turn-table 10, whose speed is magnetically sensed at 26, to produce the actual speed signal. The output of oscillator 98 is divided and integrated to form the sawtooth reference signal, which may have a faster rise than fall rate and be at a greater frequency (e.g. thirteen times) than the actual speed signal, for greater accuracy of control. The two signals are phase compared in control circuit 19, that includes a sample-hold device and an FET, the sawtooth being sampled whenever an actual speed pulse occurs. The result is used to control a turn-table brake 16 to regulate the turntable speed. Circuits 23, 24 are used respectively to inhibit application of the brake when starting, and used to apply maximum braking power when stopping and after the turn-table drive has been turned off. Video information on the disc may be in a spiral groove that is sensed using a capacitive pick-up 12.
Patent GB-1409368-A (GB)
Title: Steel converter vessel pollution control method and apparatus
IPC: C21C5/40
Filed: 1973-02-16
Abstract: 1409368 Refining ferrous metals PENNSYLVANIA ENG CORP 16 Feb 1973 [23 Feb 1972] 7752/73 Heading C7D [Also in Division F4] Molten ferrous metal is bottom blown in a converter with oxygen jets surrounded by hydrocarbon shielding fluid, the hot gases evolved being passed through a water-cooled hood and duct to a spray chamber, in which the temperature of the gases is reduced to about 550F, and then to an electrostatic precipitator and stack. In the apparatus shown the spray chamber 45 and electrostatic precipitator 55 are situated on opposite sides of the converter 10, a projection of the converter trunnion aris intersecting the spray chamber. Fan 57 draws gas through the hood 35, watercooled duct 40, chambers 45 and 55 and discharges to stack 61.
Patent GB-480921-A (GB)
Title: Production of alumina from clay or other aluminous ore
IPC: C01F7/26
Filed: 1937-03-17
Abstract: Clay or other aluminous ore is treated with sulphuric acid of a concentration of the order of 70 per cent, and calcium sulphate is added to the aluminium sulphate solution obtained after removal of the residue, the limits of addition being from one to three atoms of calcium for two atoms of aluminium.  The mixture is dried, and calcined at a temperature of 1200 DEG  C. upwards, sulphur dioxide being evolved, and a calcium aluminate clinker formed.  The latter is treated with sodium carbonate solution, and alumina is produced from the sodium aluminate solution obtained, e.g. by treatment with carbon dioxide.
Patent GB-791825-A (GB)
Title: Herbicidal and fungicidal compositions
Inventor: TURSICH JOSEPH ALBAN
IPC: A01N47/20
Filed: 1956-03-13
Abstract: A pesticidal composition comprises as an active ingredient propynyl N-phenylcarbamate or propynyl N-(substituted-phenyl)-carbamate preferably in the proportion of from 0.2 to 3.0 per cent by weight and an inert solid diluent or an inert liquid diluent including a dispersing agent.  Specified active ingredients are propynyl N - phenylcarbamate, propynyl N - 3 - methylphenylcarbamate, propynyl N - 3 - chlorophenylcarbamate, propynyl N-2-methyl-5 - methoxyphenylcarbamate, propynyl N-2,4,5 - trichlorophenylcarbamate, propynyl N-2 - chloro - 5 - ethoxyphenylcarbamate, propynyl N - 2,5 - dinitrophenylcarbamate, propynyl N - 3 - cyanophenylcarbamate, propynyl N - ethyl - N - 3 - chlorophenylcarbamate, propynyl N - methyl - N - 2 - methyl - 5 - ethyl-phenylcarbamate, propynyl N - 3 - allylphenylcarbamate, propynyl N - 2,5 - dichloro - 4 - propylphenylcarbamate, propynyl N - cyclohexyl - N - 3 - chlorophenylcarbamate, propynyl N - phenyl - N - 2,5 - dipropoxyphenylcarbamate, propynyl N - methoxy - N - 3 - methylphenylcarbamate, propynyl N - 2 - chloro - 4 - methyl - 5 - ethoxyphenylcarbamate.  Specified solid diluents are calcium silicate, aluminium silicate, calcium-aluminium silicate, magnesium silicate, naturally occurrng clays, pulp, wood flour, bentonite, finely-divided calcium carbonate.  Specification 574,995 is referred to.
Patent GB-259829-A (GB)
Title: Improvement in water- and wind-mills
IPC: F03B17/06
Filed: 1926-03-20
Abstract: 259,829. Croote, C. de. March 20, 1926. Current motors; regulating.-A water mill with a vertical shaft 3 supported by a pontoon 1 has four plane vanes 14, 14<1>, 14<11>, 14<111> swinging from horizontal arms 13, stops 17 being provided so that the vanes rest vertically against them when travelling with the current and swing into the horizontal position when travelling against the current. For regulating the mill, the amplitude of the swing of two of the vanes may be limited by a hand-wheel 23 operating on a pivoted lever 18 and rods 26 having a lug 27 which engages bars 28 on two of the vanes. By moving two of the vanes into the horizontal position by means of the hand-wheel 23, the mill may be stopped. In a modification acting as a windmill, the vanes project above and below their horizontal pivots.
Patent GB-829544-A (GB)
Title: Improvements in or relating to repair patches
IPC: B29C73/10
Filed: 1955-03-17
Abstract: 829,544. Tyre plasters. ROMAC INDUSTRIES Ltd., and BOYCE, R. D. March 16, 1956 [March 17, 1955], No. 7852/55. Class 144 (1). A tyre plaster for repairing tyre covers, comprising a body 6 coated with a layer 7 of soluble adhesive which is protected by a cover layer 8 of suitable protective material, such as polyethylene, and which is formed with discontinuous indentations 9 to trap solvent applied to the layer 7 prior to fixing of the plaster, is made by coating the cover layer 8 with the adhesive layer 7 and applying a body 6 of cured rubber to the coated side of the layer 8 under pressure so as to form the indentations 9. Fig. 2 shows a web of polyethylene 10 coated with an adhesive layer 12, of between 0.007 and 0.012 inch thickness, fed around a roller 13 above a gelatine or rubber roller 14 around which passes a conveyer belt 15 carrying a series of cured rubber plaster bodies 17 having bevelled and solutioned upper surfaces. The bodies 17 are picked up by the adhesive-coated surface of the web 10 and the web is then trimmed to provide individual plasters. These are then supported as at 19, Fig. 3, on a canvas sheet 25 between a hot platen 20 and a watercushioned rubber blanket 21 of a cold platen 22 with a flexible wire gauze 26 interposed between the polyethylene surface of the plaster and the hot platen 20. The press is then closed at a pressure of 2000 p.s.i. for half a minute and at a temperature of between 150‹ and 160‹ F. This effects union of the plaster layers and the indentation of the polyethylene and adhesive layers by the mesh of the gauze. The cover layer may comprise polyvinyl chloride instead of polyethylene.
Patent GB-341770-A (GB)
Title: Improvements in or relating to apparatus for tipping railway wagons
IPC: B65G67/00
Filed: 1930-03-11
Abstract: 341,770. Weighing-apparatus fitted to rotary tipplers. ELLSON, B. E., 12A, Wilton Road, Collier's Wood, London. March 11, 1930, No. 7864. [Class 143.] Railway wagon tipping apparatus of the kind having a wagon carrying platform adapted to raise the wagon to the tipping cradle has the rails or tracks on the platform formed with gaps through which project, when the platform is supported at its ends, either the wheels or sliding bars on which the wheels rest, so that the wheels or bars rest on a weighing machine. The platform A is fitted with rails B formed with gaps through which the wagon wheels G can directly rest on a weighing machine or, as shown, the gaps may be fitted with sliding bars C with shoulders J adapted to rest on the platform. The platform is fitted with hoisting ropes H and is lowered until its ends D are supported on the ground. The sliding bars.then rest on the weighing machine E and the weight of the wagon is transmitted through the sliding bars to the weighing machine. In other modifications the bars are provided with varying lateral clearances. The bars may be adapted to deal with wagons of different lengths. The bars may be loosely mounted on the weighing machine or the bars C, C<1>, Figs. 12 and 13, may be secured to the weighing machine E, the bar C<1> having recesses T to accommodate crosspieces Q<1> on the platform for wagons of various lengths. The rails on the platform may be formed as grooved tracks. Specifications 340,684 and 340,831, [both in Group XXX], are referred to.
Patent GB-565657-A (GB)
Title: Improvements in or relating to electrical follow-up mechanism
Filed: 1943-05-19
Abstract: 565,657. rollow-up systems. HORSTMANN, B. G. March 19, 1943, No. 7969. [Class 40 (i)] [Also in Group XXXVII] In a follow-up system in which the follow-up member 21 is integral with a sleeve 23 which is rotatable about a spindle 22 constituting the control member, a pair of arms 28, 29 carrying contacts 26, 27 are interconnected by a spring 30 and are pivoted on a support 31 which is in turn pivoted on the follow-up member 21. A lever 33 on the same pivot as the arms 28, 29 has an edge 34 which is pressed by virtue of a spring 39 in a groove in a small disc 35 on the control spindle 22, while a pin 38 projecting from the other end of the lever engages between the rear ends 36, 37 of the arms 28, 29 and normally maintains the contacts 26, 27 away from co-operating contacts mounted on the member 21. Any movement of the spindle 22 relative to the member 21, however, rocks the lever 33 and allows the closure of one or other of the pairs of switch contacts. The contacts control electric brakes 19, 19a of the induction type which couple the sun-wheels 6, 6a of a differential gear 4 alternatively to a driving shaft 1, as described in Specification 552,369, [Group XXXIII], the movement being imparted through direct and reverse gearing respectively to the sun-wheels 9, 9a of a similar differential gear 7 on a shaft 2 which controls the output shaft 18 and also the sleeve 23 of the follow-up member 21. If desired, the shaft 2 may be regarded as the output shaft and the shaft 18 may be used to permit manual operation in the event of failure of the mechanical drive. Amplifiers may be interposed between the switch contacts and the brakes. According to the Provisional Specification, the switch mechanism may be carried by the control member and actuated by abutments on the follow-up member.
Patent GB-1019332-A (GB)
Title: A process for use in the production of a semiconductor device
IPC: B28D5/00
Filed: 1963-02-28
Abstract: 1,019,332. Semi-conductor devices. SIEMENS-SCHUCKERTWERKE A.G. Feb. 28, 1963 [June 19, 1962; Aug. 28, 1962], No. 8163/63. Heading H1K. In making a semi-conductor device, the semi-conductor body, after a metal electrode has been alloyed to it, is heated in a gaseous medium containing the vapours of nitric and hydrofluoric acids. The body is held at a temperature above that of the vapours to prevent them condensing on the body and thus conveying metal ion impurities into it. In the embodiment a silicon disc is alloyed between gold-antimony and aluminium foils backed by molybdenum plates and the resulting assembly subject to the treatment with acid vapour in a polystyrene vessel. The gaseous medium; the composition of which is given, may include nitrogen, rare gases, air or oxygen. After the treatment, which may also be applied to germanium transistor and four layer element, the assembly is coated with lacquer.
Patent GB-1011459-A (GB)
Title: Improvements in and relating to peak detectors
IPC: H03D1/18
Filed: 1964-02-27
Abstract: 1,011,459. Transistor pulse shaping circuits. SOC. D'ELECTRONIQUE ET D'AUTOMATISME. Feb. 27, 1964 [March 1, 1963], No. 8173/64. Heading H3T. Pulse signals are differentiated and then applied to a two condition circuit to switch it over at a predetermined amplitude of the rising front of the differentiated signals and restore it at the passage through zero. Signals (a), (b) from a tape read-out head are applied to transistors 2, 3 arranged such that positive-going signals cause one transistor to conduct and negative-going signals cause the other to conduct. The resulting outputs are differentiated by transformer 5, 6, 7 poled such that the output from winding 7 is of the same sense whether positive or negative signals are received. The differentiated signal triggers a bi-stable circuit 12, 14 when it exceeds a threshold value and restores the circuit when the differentiated signal passes through zero, that is, at the peak of the input signal.
Patent GB-1418266-A (GB)
Title: Pump unloading circuit
IPC: F04B49/02
Filed: 1974-02-22
Abstract: 1418266 Controlling pumps CATERPILLER TRACTOR CO 22 Feb 1974 [5 March 1973]  8196/74 Heading F1A A pump unloading circuit for reducing the torque load on a prime mover 13 during starting comprises a valve 10 with a spool 36 which is moved to the right in the Fig. by a pedal 56 to connect the pump output line 23 to a reservoir 14 through a port 30, passage 28, port 31 and a conduit 24. Normally, lands 38, 39 close the passage 28 and a relief valve 19 controls the system pressure.
Patent GB-348282-A (GB)
Title: Improvements in the separation of anhydrous organic acids from their aqueous solutions
IPC: C07C51/46
Filed: 1930-03-14
Abstract: Monobasic organic acids of the aliphatic series, other than acetic acid, are separated from their aqueous solutions by extraction with a solvent which is insoluble or only slightly soluble in water, has a boiling point higher than that of the acid and does not form an azeotropic mixture therewith, followed by dehydration of the extract with an entrainer which forms with water an azeotropic mixture having a minimum boiling point lower than that of the mixture formed by water and the solvent, as in the parent Specification.  The acid vapours may be used to heat the dehydrating column as in Specification 300,246, [Class 32, Distilling &c.]; and the extraction stage may be carried out in the vapour phase, as in Specification 301,415, [Class 32, Distilling &c.].  The solvent may be separated from the acid by the use of an accessory liquid forming with the acid a minimum boiling point mixture as in Specification 317,462, [Class 32, Distilling &c.].  Aqueous propionic acid is extracted with amyl propionate, and the extract is dehydrated by distillation with ethyl propionate.  The propionic acid may be separated from the amylpropionate by distillation with a petroleum fraction of B.P. 138-140 DEG  C., with which the acid forms an azeotropic mixture. Aqueous formic acid is extracted with amyl formate, and dehydrated with propyl formate; the formic acid is separated from the amyl formate in azeotropic mixture with normal heptane.ALSO:Monobasic organic acids of the aliphatic series, other than acetic acid, are separated from their aqueous solutions by extraction with a solvent which is insoluble or only slightly soluble in water, has a boiling point higher than that of the acid, and does not form an azeotropic mixture therewith, followed by dehydration of the extract with an entrainer which forms with water an azeotropic mixture having a minimum boiling point lower than that of the mixture formed by water and the solvent, as in the parent Specification.  The acid vapours may be used to heat the dehydrating column as in Specification 300,246, [Class 2 (iii), Dyes &c.]; and the extraction stage may be carried out in the vapour phase, as in Specification 301,415, [Class 2 (iii), Dyes &c.].  The solvent may be separated from the acid by the use of an accessory liquid forming with the acid a minimum boiling-point mixture as in Specification 317,462, [Class 2 (iii), Dyes &c.].  Aqueous propionic acid is extracted with amyl propionate, and the extract is dehydrated by distillation with ethyl propionate. The propionic acid may be separated from the amyl propionate by distillation with a petroleum fraction of B.P. 138-140 DEG  C., with which the acid forms an azeotropic mixture. Aqueous formic acid is extracted with amyl formate, and dehydrated with propyl formate; the formic acid is separated from the amyl formate in azeotropic mixture with normal heptane.
Patent GB-290790-A (GB)
Title: Variable-speed drive
IPC: F16H37/08
Filed: 1927-03-26
Abstract: 290,790. Chorlton, F. O. L., and Walmsley & Co., Ltd., C. March 26, 1927. Variable-speed gearing in which the speed may be varied slightly at will as is desired in drives for paper-making machines comprises an epicyclic train controlled by a variable belt pair s, t. In the arangement shown, the planet carrier m of the epicyclic train is fast on the driving-shaft a. The driven epicyclic element e is connected by a rigid sleeve b loose on the shaft a to a pair c, a which drives positively the driven machine. The belt pair s, t, which is controlled by hand, transmits a small part of the drive through a separate countershaft r to the controlled epicyclic element n. The cone pair s, t may be replaced by an expanding-pulley pair. In a modification, the epicyclic elements are arranged on the shaft a in a different manner and the chain gear o, Fig. 2, is replaced by a bevel toothed train.
Patent GB-330921-A (GB)
Title: Improvements in the isolation of fatty acids obtained by the oxidation of waxes
IPC: C07C51/48
Filed: 1929-03-14
Abstract: 330,921. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). March 14, 1929. Fatty acids, purifying.-A process for isolating fatty acids from the oxidation products of waxes, e.g. paraffin, carnauba or beeswax, formed by the action of gaseous or gasifiable oxidizing agents consists in treating said oxidation products with concentrated acetic acid, preferably while heating, and, after cooling and separating the upper layer of unsaponifiable material containing esters &c.. recovering the fatty acids from the acetic acid solution by cooling or by removing the acetic acid by distillation. For example, the oxidation products of paraffin wax are dissolved in glacial acetic acid at 60‹ C. The solution is then cooled to a temperature not below 15‹ C. to separate the unsaponifiable material, and the resulting acetic acid solution of fatty acids is distilled in vacuo. When concentrated acetic acid is used without heating, the acidic constituents only are extracted.
Patent GB-385153-A (GB)
Title: Improvements in and relating to rotary kilns and coolers
IPC: F27B7/16
Filed: 1932-03-21
Abstract: 385,153. Rotary kilns and coolers. FASTING, J. S., 9, Monrads Allee, Valley, near Copenhagen. March 21, 1932, No. 8357. Convention date, April 11, 1931. [Class 51 (ii).] The devices for promoting heat transfer between the charge in a rotary kiln or cooler, and the gases or air flowing therethrough, are made of alloys of iron with chromium and carbon, or with nickel, chromium and carbon, which will resist oxidation at temperatures of 900‹ C. and above. The devices may take the form of annuli secured to the kiln shell in planes at right-angles to the kiln axis and these annuli may be notched to facilitate the flow of the material and the gases. Alternatively, the devices may consist of transverse plates 3 with head portions 5 which serve to agitate the charge.
Patent GB-444777-A (GB)
Title: Improvements in sensitive electric relay devices
IPC: H01H53/015
Filed: 1935-03-18
Abstract: 444,777. Spark preventing in switches. WESTON ELECTRICAL INSTRUMENT CORPORATION, 614, Freling- huysen Avenue, Newark, New Jersey, U.S.A.- (Assignees of Lamb, A. H.; 402, Chilton Street, Elisabeth, New Jersey, U.S.A.) March 18, 1935, No. 8388. Convention date, July 11, 1934. [Class 38 (v)] In a relay for controlling an electric circuit having a moving system operable to displace a moving contact into engagement with a relatively stationary contact and means for holding the movable contact in such displaced position, an auxiliary switch has its contacts connected in series with the relay contacts, the auxiliary switch being arranged to be closed during periods when the moving system of the relay is operative to displace the movable contact but being arranged to be opened before the relay contacts are opened whereby the circuit which is closed by engagement of the relay contacts is broken by the opening of the contacts of the auxiliary switch. As shown, the pointer 3 of an instrument carries a magnetic contact-forming armature 4 which on deflection into the range of attraction of a permanent magnet 5 forming a relatively fixed contact is attracted thereto to complete with a rapid action a circuit including a controlled device 6. This circuit also includes an auxiliary switch 8 having contacts 10, 11 held in engagement by a spring and the controlled circuit is broken by operation of this switch either manually or automatically. The movable contact arm of the switch 8 carries a pusher arm 9 which during the opening of the switch engages the pointer 3 and separates the magnetic contacts 4, 5 thus ensuring that the circuit is always opened at the switch 8 and the arc produced on break, which may be relatively of considerable magnitude if the controlled device is highly inductive, is always produced between contacts 10, 11 of the switch 8 and not at the relatively delicate instrument contacts. The instrument may be such as is responsive to changes in temperature, pressure, humidity and the like. In a modified arrangement described the pusher arm 9 is separate from the auxiliary switch but is normally spring-pressed so that an insulating pin carried thereby normally engages and holds together the spring contacts of the auxiliary switch. On operation of the pusher arm, however, to separate the instrument contacts, the auxiliary switch contacts spring apart to break the controlled circuit before the instrument contacts are separated and the auxiliary contacts are automatically re-engaged and closed when the pusher arm is released. The pusher arm in this form may be operated automatically through suitable mechanism.