baber/WOPTO huggingface dataset:
Patent GB-776496-A (GB)
Title: Improvements in and relating to control valves for indirectly acting compressed air brakes
IPC: B60T8/18
Filed: 1955-06-10
Abstract: 776,496. Fluid-pressure brakes. VERWALTUNGSGES DER WERKZEUGMASCHINENFABRIK OERLIKON. June 10, 1955 [June 12, 1954], No. 16716/55. Class 103 (1). In fluid pressure braking apparatus for railway vehicles a pressure transmitter device 11 is interposed between normal triple valve 6 and the brake cylinder 8, the device 11 including diaphragms 13 and 14 of different effective area enclosing a first pressure chamber 32, which may be connected either to a second pressure space 18 or to atmosphere according to the selected position of valve means 12, and which is in permanent communication with a space 29 biasing a diaphragm 28 and sleeve 25 against a spring 27. The diaphragm pile 13, 14, 15 is. secured centrally to a spindle having an extension 16 with a head 24 which is subject to the resistance of spring 27 when moving upwardly but such resistance is removed if upward force on a diaphragm 28 precompresses the spring 27. Control pressure for the triple valve 6 acts in chamber 34 and governs the flow of fluid from the auxiliary reservoir 7 to the brake cylinder 8 in combination with the action of diaphragms 13 and 14. The cock 12 is as shown for a low speed of the train, but if braking is to be effected at high speed the cock 12 is rotated through 90 degrees to place the chambers 29 and 32 in communication with the atmosphere so that the diaphragm 14 is ineffective and there is a quicker rise in brake pressure. In one alternative embodiment the change-over from slow to high speed braking characteristics is made by valve means automatically controlled by a speed-responsive member. In another embodiment the triple valve device performs also the function of the pressure transmitter device 11.
Patent GB-1090010-A (GB)
Title: A substituted theophylline derivative
IPC: A61K31/52
Filed: 1966-04-15
Abstract: 7 - [2 - Hydroxy - 3 - (N1 - hydroxypropylpiperazino) - propyl] - theophylline and a pharmaceutically acceptable salt, particularly the nicotinic acid addition salt, thereof and preparation thereof by reacting 1-(b -hydroxypropyl)-piperazine either: (a) with 7-(2,3-epoxypropyl)-theophylline in ethanol or (b) with epichlorhydrin and subsequently with theophylline in iso-propanol in the presence of aqueous sodium hydroxide, and then, in either case, reacting the above-named compound, which results, with nicotinic acid.  Pharmaceutical compositions suitable for enteral, parenteral and rectal administration, which comprise 7-[2-hydroxy-3-(N1-2-hydroxy-propylpiperazino propyl] - theophylline preferably as the nicotinate in association with a pharmaceutically acceptable carrier, have vasodilatory, bronchodilatory, respiratory, analeptic, diuretic, spasmolytic and clarifying activity.
Patent GB-529798-A (GB)
Title: Improvements in and relating to radio receivers
IPC: G04C23/00
Filed: 1939-06-07
Abstract: 529,798. Electric control systems. BRITISH THOMSON-HOUSTON CO., Ltd. June 7, 1939, No. 16749. Convention date, June 7, 1938. [Class 40 (i)] Arrangements for automatically tuning a wireless receiver to pre-selected stations at different times of the day comprises a constantly rotating shaft 16 which reciprocates a rider 15 at constant speed, the rider having contacts 14 connected to tuning control conductors 26 and engaging at regular intervals e.g. 15 minutes, contacts of keys 5 spaced along the shaft and movable, to select for engagement, a contact on the rider. The arrangement operates in conjunction with a push-button timing control system of the reversible motor driven commutator type, the closure of a circuit between conductor 27 at the time switch and one of conductors 26 having the same effect as pressing a button. The circuit from wire 27 includes a switch 28 closed by cams 37, 37<SP>1</SP> for an interval at the end of each 15 minute period sufficient to effect timing, and thence passes over bar 32, contact 30 or 31, grooved plate 9 or 10, one of keys 5, and a contact on rider 15 to one of conductors 26. The grooved plates serve also to retain the keys 5 in their set positions, the keys on the upper and lower bars serving 12- hour periods and bar 32 being moved by rider 15 at the end of its travel in either direction to switch over from one grooved plate to the other. Switch 28 is also provided with a manual control 8, and shaft 16 may operate a clock 2 which gives an indication (black or white) through aperture 48 of which grooved plate is in operation. One of the leads 26 sets the receiver to the " off " position.
Patent GB-114413-A (GB)
Title: Clutch Combined with Speed Changing Gear.
IPC: B62M11/06
Filed: 1917-11-14
Abstract: 1 1 4, 4 1 3. "Condor" Manufacture Suisse de Cycles et Motocycles. March 26, 1917, [Convention date]. Variable-speed toothed gearing; clutches, friction. - A band clutch comprising bands a adapted to be contracted on a driving-drum x by levers e, e<1> is operated by cones t, t<1> on a spindle s operating the clutch p of a change-speed gear i, j, l, m, so that the band clutch, which drives the driving-shaft d of the gear, is momentarily disengaged during change of gear.
Patent GB-510919-A (GB)
Title: Improved device for varying the damping of a tuned oscillatory circuit
IPC: H03H7/01
Filed: 1938-06-03
Abstract: 510,919. Transformers. NAAMLOOZE VENNOOTSCHAP PHILIP'S GLOEILAMPENFABRIEKEN. June 3, 1938, No. 16763. Convention date, June 7, 1937. [Class 38 (ii)] [Also in Group XL] In order that the damping of a tuned circuit may be varied without effect on the tuning, a coil L2 is movable along a core K composed partly of high-resistance material Fe and partly of lowresistance material Cu. The materials may be iron and copper, or irons having different resistivities, and when the coil is moved to the right for the purpose of reducing the band-width by reducing the coupling, it embraces more of the low-resistance part of Cu of the core and becomes more closely coupled with the lowresistance ring R, so that the damping is simultaneously diminished. Variation of selfinductance may be prevented by giving different diameters to the two parts of the core. The coils are housed in a screening box B. In a modification, Fig. 2 (not shown), the coil L2 is rotatable in the neighbourhood of a segment composed of a high-resistance iron part and a low-resistance copper part.
Patent GB-130324-A (GB)
Title: Improvements in or relating to Recording Devices for Speed Indicators.
Inventor: JAEGER EDMOND
IPC: G01P1/12
Filed: 1919-07-07
Abstract: 130,324. Jaeger, E. July 23, 1918, [Convention date]. Feriodic speed-indicators with recording-apparatus of the type described for example in Specifications 100,542, 102,061, and 102,924, comprises a baryta-coated record-disk d rotated from the timing-shaft c and marked by a silver pencil moved radially according to speeds. The pencil is carried by a spring plate removably attached to an arm mounted on a carriage y which is guided by a rod v and influenced by a spring x. A rack it on the carriage engages a pinion t on the pointer spindle a. The reeording-meehanism is enclosed in a casing consisting of a flanged plate c carrying the record-disk and frictionally fitting into a ring f which is in contact by ball-bearings with the fixed supporting-plate n and is formed with teeth m for driving-connexion with the timing-gear. A blade spring l<1> on the cover i<1> maintains the plate c and ring f in engagement.
Patent GB-477003-A (GB)
Title: Improvements in and relating to reducing or regulating valves
IPC: G05D23/12
Filed: 1936-06-18
Abstract: 477,003. Pressure-reducing valves; gas meters. SAN PAULO GAS CO., Ltd., and SEYLAZ, G. E. June 18, 1936, No. 16994. [Classes 54 and 135] A pressure-reducing valve adapted to be fitted on the inlet side of a gas meter comprises a casing a having integral gas inlet and outlet connections c, f and an inlet passage c<1> extending from the inlet c into the central part d of the casing and provided with two concentric openings, one for the seat e<1> for a valve member e which opens downwardly into the meter casing and the other for reception of the lower of two diaphragms g, i, the space k between which is open to the outlet f which is also the meter outlet. The diaphragm i is loaded by a weight i<1> and both are secured on the valve stem which is guided by a spider h clamped above lower diaphragm g. The diaphragm i is clamped at its edge on a wall d<2> of the casing by a cover j under the top of which is clamped a third diaphragm m carrying a nipple l. The space r between the diaphragms i, m normally communicates with the atmosphere through the nipple l and a passage p opening into a cylindrical cavity s in which the nipple l slides. When gas leaks into the chamber r due' to failure of the diaphragm i, the nipple seats on a pad o in the cavity s and cuts off the chamber r from the atmosphere. A port f<1>, Fig. 3, connects the space k with an inward extension f<2> of the outlet f. The latter may contain a Venturi tube q having a port ql opening into the narrowest part of the throat so as to increase the outlet pressure when the consumption increases. According to the Provisional Specification, the reducing valve may be formed as a unit separate from the meter casing.
Patent GB-204113-A (GB)
Title: Improvements in tennis rackets and the like
IPC: A63B51/04
Filed: 1922-06-20
Abstract: 204,113. Talbot, A. B., and Payne, E. E. M. June 20, 1922. Rackets.-The playing face of a tennis or like racket consists of a diaphragm, the tension of which can be adjusted. The diaphragm 1 is formed of flexible material, preferably thin tough leather such as the tanned skin of lamb, sheep or pig. The diaphragm may be attached to the frame 2 by lacing 5, Fig. 1, or by hooked wires 6, Fig. 2, provided with adjusting-nuts 7. In the latter method of attachment, the diaphragm is preferably provided with a reinforcement of wire secured around its edge by stitches 8. Perforations 9 may be made in the diaphragm to reduce the air-resistance. Reference has been directed by the Comptroller to Specification 21122/01.
Patent GB-786358-A (GB)
Title: Processes for the catalytic cracking of hydrocarbon oils
IPC: C10G11/18
Filed: 1955-06-14
Abstract: In a two-stage process of cracking a hydrocarbon oil with finely-divided catalyst wherein a fraction, boiling above the gasoline range, of the hydrocarbon products from the 1st cracking zone is cracked in the 2nd cracking zone which is maintained at a lower temperature than the 1st zone, hot freshly-regenerated catalyst is supplied to the 1st zone, the catalyst is separted from the hydrocarbon products formed in the <FORM:0786358/III/1> 1st zone, at least 20 per cent of this once-used catalyst is passed directly to a stripping zone, the remaining part of the once-used catalyst is employed as catalyst in the 2nd cracking zone, the twice-used catalyst separated from the products of 2nd zone is passed to the aforementioned stripping zone, and the stripped catalyst is passed to the regenerator.  The process affords efficient stripping of the spent catalyst.  A distillate of B.R. 218-538 DEG  C. obtained by vacuum-flashing a straight-run residue is passed through line 1 into cracking zone A wherein it is contacted with hot freshlyregenerated silica-alumina catalyst at about 1120 DEG  F. supplied through line 18, the catalyst/oil ratio being 12.  A temperature of 1020 DEG  F. and a pressure of 2.5 atm. are maintained in zone A, and a conversion of 48 per cent is obtained.  The total vapour products, free from catalyst, are passed to fractionator 3, and gasoline (+ gas) is separated overhead.  The higher boiling oil removed from the base of the fractionator is passed to cracking zone B wherein it is contactd with about 59 per cent by weight of the catalyst withdrawn from zone A via line 6.  A temperature of 910 DEG  F. and a pressure of 2.2 atm. are maintained in zone B; and a conversion of 28 per cent (based on the fresh feed to the plant) is obtained therein.  The total product vapours from zone B are passed to fractionator 8, from which gasoline (+ gas) is taken-off overhead while catalytically-cracked gas oil is withdrawn from the base.  This gas oil may be recycled to either zone A or zone B.  The spent catalyst from zone B is passed by line 11 to stripping zone C; and the remaining part of the once-used catalyst from zone A is also passed to zone C via line 14.  Steam is introduced into zone C through line 12; and a temperature of 955 DEG F. is maintained therein.  The hydrocarbons stripped off the mixed catalyst are withdrawn through line 13.  The stripped catalyst is regenerated in zone D, air being supplied through line 16; and the regenerated catalyst is then recycled to cracking zone A by line 18. Specification 784,546 is referred to.
Patent GB-296842-A (GB)
Title: Improvements relating to slicing machines
IPC: B26D7/32
Filed: 1927-06-28
Abstract: 296,842. Maatschappij tot Vervaardiging van Snijmachines Volgens van Berkel's Patent en van Andere Werktuigen, and Berkel, C. F. M. van. June 28, 1927. Cutting slices in succession. - In a slicing- machine, the slice conveyer comprises flexible travelling members, slice-carrying prongs connected thereto and means for maintaining the tension of the travelling members constant. The supports for the prongs are set back, so that the distance between the prong tips is not increased as the prongs pass around the pulleys. As shown in Fig. 1, belts 11, 12 of trapezial section pass around correspondingly grooved pulleys 31, 32, 37, 38 and are connected by prong bars 13, 14 (two only being shown) which are cranked inwardly. The bars are secured to the belts by bolts 18. A central pillar 21 is riveted to, and spaces, plates 19, 20, the lower plate 20 being removably secured on a bracket 22 projecting from the base 1 by a nut 23 and stud 24. Shafts 25, 26 extend between the plates 19, 20, the shaft 25 being rotatable and journaled therein in ball bearings, whilst the shaft 26 is angularly stationary and is held at the ends in blocks 33, 34 slidable in guide ways 35, 36 on the plates 19, 20. The pulleys 37, 38 are freely revoluble on the shaft 26 which is held in a position to tension the belts 11, 12 by a rod 47 having a bent-up end engaged by a roller 46 on a bell-crank 43, 44 pivoted at 45 to the pillar 21 and pulled to maintain the belt-tension by a spring 41. To remove the belts and prong bars as 'a unit from the machine, the shaft 26 is pulled towards the shaft 25 by a lever 51 pivoted at 52 to the member 47 and having a toe, bearing against a bracket 49. The plate 19 is slotted at 55 to permit movement of the lever 51, which, after the initial movement, contacts with a pin 54 on the extension 53 of the member 47, so that with further movement of the lever it moves as if solid with the member 47. The roller 46 is depressed and comes under the member 47 thereby rendering the spring 41 inoperative. A roller 56 on the pillar 21 facilitates movement of the member 47. In a modification, Fig. 5, the bars 13 are shaped to engage the grooves in the pulleys. In Fig. 6, the band 11 is flat and the bars engage recesses 31<c> in the innermost flange of each pulley. The movement of the pronged belt member is produced by known rack and pinion mechanism 58 - - 61.
Patent GB-1140693-A (GB)
Title: A screw extruder comprising an axially extending feed pocket
IPC: B29C48/50
Filed: 1966-04-19
Abstract: 1,140,693. Extruder feed systems. BARMER MASCHINENFABRIK A.G. 19 April, 1966 [3 June, 1965], No. 17141/66. Addition to 1,103,925. Heading B5A. [Also in Division B1] The arrangement described in the parent Specification 1,103,925, wherein an axially extending feed pocket 4 communicates with a feed inlet 2 and screw 3, is modified by the provision of a gate 5 which is movable to vary the volume and/or the inlet cross-section of the pocket. As shown, gate 5 is vertically reciprocable and is moved manually by rotation of lever 10 to actuate rack and pinion 11, 9. Gate 5 may be provided with a gas vent (12), Fig. 2 (not shown). Alternatively the gate may be annular and notched as at (14), Fig. 3 (not shown), or in the form of a pivoted cover (15), Fig. 4 (not shown), with or without an end-gate (17) to vary the inlet cross-section of the pocket. In a second embodiment, Fig. 5 (not shown), operation of gate 5 is dependent on capacitance melt-level meters (24, 25), situated within an extraction chamber (23), which control a reversible motor (28), A stirrer (30) is also provided. In a third embodiment, Fig. 6 (not shown), two feed pockets (33, 34) are provided and have corresponding adjustable gates (5, 39), pocket (34) receiving thermoplastics melt pumped from a first melt zone via a conduit (31), a breaker plate (37) and a vacuum gas-extraction chamber (32). In all cases the screw core is of large diameter in the region beneath gate 5 compared with the screw core diameter in the neighbourhood of the feed pocket.
Patent GB-1488773-A (GB)
Title: Process for the preparation of propylene oxide
IPC: C07C409/24
Filed: 1976-04-28
Abstract: 1488773 Propylene oxide preparation BAYER AG and DEUTSCHE GOLDUND SILBERSCHEIDEANSTALT 28 April 1976 [30 April 1975] 17174/76 Heading C2C The invention comprises a process for the continuous preparation of propylene oxide from propylene and aqueous hydrogen peroxide wherein (a) an aqueous solution containing 10 to 40% by weight of a water-soluble acid catalyst and 20 to 30% by weight of hydrogen peroxide is reacted with propionic acid in a molar ratio of hydrogen peroxide : propionic acid of 3À5 to 5 : 1 at temperatures of from 10 to 70 C., (b) the resulting reaction mixture is extracted with benzene in counter-current, (c) all or part of the aqueous raffinate from the extraction, which contains in the main hydrogen peroxide and acid catalyst, is reconcentrated by removing water by distillation, (d) the reconcentrated raffinate and the part of the raffinate which has optionally not been reconcentrated are recycled into the reaction stage (a), the concentrations of hydrogen peroxide and water-soluble acid catalyst being made up to those required for the reaction with propionic acid by adding the hydrogen peroxide required to restore the hydrogen peroxide concentration to that required for the reaction with propionic acid to the part of the raffinate which is to be reconcentrated, before or after removal of water by distillation according to (c), or to the part of the raffinate which is optionally not reconcentrated, (e) the benzene extract, which contains in the main perpropionic acid and propionic acid, is treated with water or an aqueous solution, (f) the water-containing benzene extract, which is now virtually free from hydrogen peroxide, is subjected to an azeotropic distillation so that the residual water content in the sump of the azeotrope column is less than 0À5% by weight, (g) the solution, containing perpropionic acid and propionic acid, which is now obtained as the sump product from azeotropic distillation, is reacted with excess propylene at temperatures of from 40 to 100 C. and at a pressure of from 2 to 30 bars, and (h) the reaction mixture, containing propylene oxide, is worked up in a manner which is in itself known, pure propylene oxide being isolated and the excess propylene which may be present, the propionic acid and the benzene being recovered and the whole or part of these recovered products being recycled into the process.
Patent GB-724145-A (GB)
Title: Steroids
IPC: C12P33/00
Filed: 1952-07-08
Abstract: The invention comprises pregnane- and allopregnane - 3.7 - diol - 20 - ones or esters thereof, and their preparation by bringing a pregnane-3-ol-20-one into contact with enzymes produced by a growing fungus of the genus Rhizopus, e.g. Rhizopus arrhizus, under aerobic conditions, with subsequent esterification if desired.  The fermentation is effected in the presence of a nutrient medium for the fungus.  Examples describe the preparation of the diol compounds above and of 3.7-diacetoxy- and 3 : 7-dibenzoyloxy-allopregnane-20-one.  Esterification may be effected with ketene, ketenes of acids, acids, acid anhydrides or acid chlorides.
Patent GB-1509803-A (GB)
Title: Programmer for a digital controller
IPC: G05B19/05
Filed: 1975-04-25
Abstract: 1509803 Programmable controller panel FORNEY INTERNATIONAL Inc 25 April 1975 [26 April 1974] 17318/75 Heading G3N A panel 11 enables an operator to enter human language instructions (e.g. if, Jump) from a flow chart (for a manufacturing process) and these are converted to machine instructions using a panel program in a digital mini computer. The machine instructions are then used to actuate the mini computer which controls the process. The human language instructions form part of an applications program, Fig. 3 (not shown), and an interpreter program, Fig. 4 (not shown), in controller 10 executes the applications program instructions after they have been converted by the panel program. The applications program can be entered either manually as described, by operating switches on the panel, or automatically using teletype, paper tape, cassette etc. A selected instruction can be passed back to the panel, decoded, and used to light various lamps thereon. Once the applications program has been entered from the panel it can be stored in cassette unit 19 and the panel removed. The applications program can relate to a tank to be filled to a required level, from two sources of reagent supply which react with gas, and this is described in considerable detail, Figs. 2 and 3 (not shown).
Patent GB-681755-A (GB)
Title: Improvements in turbines or compressors
Inventor: LJUNGBERG KARL WILHELM
IPC: F01D5/04
Filed: 1950-07-11
Abstract: 681,755. Shaft couplings. SVENSKA TURBINFABRIKS AKTIEBOLAGET LJUNGSTROM. July 11, 1950, No. 17342/50. Class 80 (ii). [Also in Group XXVI] A turbine or com pressor disc 2 is held or its shaft 1 by a solid locking screw 10 which is threaded into an axia bore 11 in the shaft. The bore 11 communicates by a passage 12, with a low-pressure space in the packing 5 and is sealed from the high-pressure spaces by sealing rings 13, 14 thus reducing the strains and stresses in the shank of the locking screw. In a modification, the screw 10 is hollow and closed by a cover and has a flange which is threaded onto the disc 2 to effect sealing therebetween.