baber/WOPTO huggingface dataset:
Patent GB-370706-A (GB)
Title: Improved method of leaching phosphate rock
IPC: C05B11/04
Filed: 1931-05-20
Abstract: A modification of the process of the parent Specification for leaching phosphate rock with sulphuric acid with or without an alkali sulphate, or with another acid such as nitric acid and alkali sulphate, wherein a portion of the unseparated reaction products is returned to the leaching process, is characterized in that the unseparated reaction products are wholly added to the leaching acid or to the precipitating agent possibly used or to both, whereupon the said mixture is used in the leaching operation.  When potassium sulphate or other precipitant in the solid state is used, the quantity of unseparated reaction products employed is such as completely to dissolve the precipitant before it is added to the leaching operation.  A quantity of 20 c.ms. of unseparated reaction products per ton of phosphate rock treated is specified.ALSO:A modification of the process of the parent Specification for leaching phosphate rock with sulphuric acid with or without an alkali sulphate, or with another acid such as nitric acid and alkali sulphate, wherein a portion of the unseparated reaction products is returned to the leaching process, is characterized in that the unseparated reaction products are wholly added to the leaching acid or to the precipitating agent possibly used or to both, whereupon the said mixture is used in the leaching operation.  When potassium sulphate or other precipitant in the solid state is used, the quantity of unseparated reaction products employed is such as completely to dissolve the precipitating agent before it is added to the leaching operation.
Patent GB-930451-A (GB)
Title: Process for propagating rabies virus
IPC: A61K39/205
Filed: 1962-04-17
Abstract: Culture liquids containing live rabies virus are produced by incubating an embryonic cell monolayer infected with live rabies virus in a sterile, protein-free, aqueous, cell-maintenance medium containing at least 0.3% by weight of pancreatic digest of casein under aseptic conditions until a substantial quantity of live rabies virus is present in the culture liquid and removing the culture liquid containing the live rabies virus from the infected, intact, embryonic cell monolayer without disrupting the monolayer. Incubation is at 30 DEG  to 37 DEG  C., and preferably 32 DEG  C., for 1 to 10 and preferably 1 to 7 days.  Further maintenance medium is added to the intact, embryonic cell monolayer to replace the removed culture liquid, the culture is incubated until a substantial quantity of live rabies virus is present in the culture liquid and the culture liquid is again removed from the infected, intact, embryonic cell monolayer.  The process is repeated until the cell monolayer degenerates.  The culture liquid, or a concentrate thereof, may be converted to a killed rabies virus vaccine in a conventional manner, e.g. by using ultra-violet radiation.  The embryonic cell monolayers are prepared by cultivating cells obtained from embryonic tissue in an aqueous cell-maintenance medium containing serum in known manner. Preferred embryos are ovian, particularly the embryos of chickens and ducks.  The preferred inoculum is C.V.S. fixed rabies virus seed (20% mouse brain suspension containing 2% horse serum). The cell-maintenance medium may be medium No. 199, Eagle's medium, Melrick's SM-2 medium and Hank's Balanced Salt solution. Antibiotics such as penicillin and streptomycin may be present to minimize bacterial contamination.
Patent GB-496714-A (GB)
Title: Tipping vehicles
IPC: B60P1/06
Filed: 1937-05-29
Abstract: 496,714. Tipping &c. vehicles ; brakes. AVELING-BARFORD, Ltd., and BRAMBLE, W. H. May 29, 1937, No. 14970. [Class 108 (i)] [Also in Group XXXIV] In a vehicle having a tipping or other displaceable body part, e.g. a slidable loose bottom or end plate, and a catch for retaining the body part against release, braking mechanism is provided one part of which is adapted to rotate with a rear wheel or with the transmission in the case of a motor vehicle, and the other part of which is coupled to the movable body part so that when the brake is applied to engage the parts frictionally with each other and the catch is released, the body part is displaced on movement of the vehicle. As shown, a buckettype tipping body D has flanges 1 which overlie the chassis frame A and a curved portion 1<1> by means of which the body is rockable on the frame, the rocking movement being limited by arms 2 pivoted at their ends 3, 4 respectively to the frame and body. At each side of the vehicle, an anchorage plate 9, which carries shoes 11 for co-operation with a brake drum 12 on the rear wheel C, is rotatablv mounted on the wheel hub and has an arm 10 connected by a link 5 with the pivot 4. The shoes 11 are operable by a cam 13, Fig. 4, and in order to prevent the cam being affected by rotational movement of the plate 9, the cam is carried on one end of a spindle 19 to the other end of which is fixed a lever 20 pivotally connected to an actuating lever 16 the lower end of which is anchored by a link 17 to a fixed stud 18 on the chassis and the upper end connected by a link 14 with the brake pedal 15. Normally, tipping of the body is prevented by a stop 7 on the body being engaged by a catch 6 controlled by a hand-lever 8. After release of the catch 6 on application of the brake while the vehicle is moving e.g. rearwardly, the shoes 11 engage the rotating drum 12 and are carried around therewith, thus rotating the plate 9 and arm 10 clockwise, Fig. 1, and pulling the body into the tipped position shown in broken lines. Stops 21, 22 limit the movement in each direction. Normally, as the body is locked to the frame by the catch 6 and as the plate 9 and arm 10 are rigidly coupled to the body, the brake acts in the usual manner in either direction. The brake may be of the contracting-band type. The body D may be mounted to swing about a longitudinal axis for sideways tipping.
Patent GB-1281402-A (GB)
Title: Heat treatment of yarns
Inventor: COATS ROBERT REID
IPC: D02J3/16
Filed: 1969-03-21
Abstract: 1281402 Flame treating yarns; tension relieving IMPERIAL CHEMICAL INDUSTRIES Ltd 11 March 1970 [21 March 1969] 15009/69 Addition to 1179734 Heading B5B [Also in Division D1F] A travelling yarn 1, e.g. a bi-component yarn of polyethylene terephthalate, is entrained in a stream of air and is passed therewith into a passage 5 of a burner and leaves the passage at a point where the air and a combustible fluid, which is supplied separately to the burner through a surrounding passageway 6 terminating at the same point, meet and are ignited, the yarn continuing to move in an axial direction through the flame. As shown, air enters at 4 into casing 3 and the yarn entering via tube 2 is entrained into passage 5 by ejector action. The device 8 is a tension barrier, and operates by blowing cold air through an inclined annular slot 10 in a passage 9 whereby a braking effect is applied to the moving yarn. As disclosed the treatment may effect heat-setting, shrinking and crimping, or in the ease of staple-fibre yarns, singeing of loose fibres.
Patent GB-920343-A (GB)
Title: Improvements in or relating to fuel element assembly for nuclear reactors
IPC: G21C3/326
Filed: 1960-04-28
Abstract: 920,343. Fuel elements. BABCOCK & WILCOX CO. April 28, 1960 [April 30, 1959], No. 15027/60. Class 39 (4). In a fuel element for a reactor in which pressurized water acts as both a coolant and moderator, fuel pins are spaced apart within a chamber and the outer layer of pins, adjacent the chamber inside surface, have a lower fissionable content than the inner pins, to avoid a higher rate of heat generation at the surface than in the element interior. In addition, where the pins are in square cross-section groups, the four corner pins have a further reduced fissionable content such that a reduction of coolant flow past the corner pins due to diagonal bowing does not cause overheating of the corners. Each pin contains both fissionable and a fertile material, thorium. As shown, the assembly 10 comprises a flow chamber 12 with coolant inlet and outlet 14 and 16 respectively, and contains fuel pins 18. Each pin is formed of fuel cylinders 24 within tube 22 which is sealed by cap 28 with insulating pellet 26 between the cap and fuel. Spacing members 30, 32 are brazed to the fuel pins and permit the flow of coolant with a small pressure drop. The outer layer pins are connected together by spacers 32 which project outwards and maintain a space between the pins and wall 11. The complete pin assembly 20 is positioned within 12 by the shoulder 34 which engages the outer fuel pins 18A. Specification 913,653 is referred to.
Patent GB-218992-A (GB)
Title: A process for the production of catalysts for the synthesis of ammonia
IPC: C01C1/04
Filed: 1924-06-21
Abstract: Catalysts for the synthesis of ammonia are prepared by treating compounds of metals of the iron group with cyanides in the presence of anhydrous liquid ammonia, freeing the product from surplus ammonia, and then heating it in a non-oxidizing atmosphere. According to examples, anhydrous ferric or ferrous chloride is stirred with dry potassium cyanide and liquid ammonia; the ammonia is then eliminated by boiling and the residue slowly heated in a non-oxidizing atmosphere.
Patent GB-251791-A (GB)
Title: Improved means for feeding metal tubes or bars through a machine for punching or drilling holes therein
IPC: B21D43/00
Filed: 1925-06-10
Abstract: 251,791. Ball, J. H. June 10, 1925. Drilling.-A machine for making equally spaced holes in tubes, bars &c. has a base carrying a roller e and supporting an arch a with removable bush b. To an extension d of the base is pivoted an arm e with hinged lever f carrying a feed pin g. A tube to be drilled is supported on the roller and the drill is rotated in the bush, positioning of the tube for subsequent holes being effected by engaging the pin with the previously drilled hole and swinging the arm till it contacts with a stop k.
Patent GB-119558-A (GB)
Title: Improvements in Machines for Weaving Tape and the Tape Woven thereby.
Inventor: HILL HENRY
IPC: D03D35/00
Filed: 1917-10-18
Abstract: 119,558. Hill, H. Oct. 18, 1917. Shuttleless looms; smallware looms; vertical looms.-In a loom for weaving a number of tapes &c. in which the weft threads A from spools are inserted in loop form into parallel vertical sheds, formed in the warps F by longitudinally-actuated thread-guiding bars or wires R, by eyed needles C, which may be secured to a bar E disposed in front of the sheds and carried and actuated by suitable mechanism, the weft loops A' are secured to form a fast selvedge by knitting or crocheting needles. These needles, such as H, may be secured to a bar G at the back only of the sheds, the bar being actuated to cause the needles to engage each loop of weft and draw it through the previously-formed loop, which is then released. In the form shown, an extra thread J controlled by a guide K is employed with each needle H and is lapped around the needle so as to form loops J<1> thereon, the weft loop being temporarily held by the needle H and then delivered over the latch at the same time as the thread J is drawn through the loop J<1>, so that the weft loop is secured by the crocheted pillar L. Corresponding needles M, threads N, and guides P may be provided at the other selvedge to make the selvedges uniform. The needles C may be hollow and in some cases be actuated to carry their threads around the needles H. The wefts are beaten up by a reed D.
Patent GB-624070-A (GB)
Title: Improvements in or relating to fastening means for doors and the like
IPC: E05B63/16
Filed: 1947-06-09
Abstract: 624,070. Door latches. BRIDSON, Ltd., S. H., and VALLANCE, D. B. June 9, 1947, No. 15166. [Class 44] A door latch having a spring shot sliding latch bolt retracted by rotation of a handle in one direction and locked in the shot position by rotation of the handle in the reverse direction has a cam member on the handle spindle with a tapered wedge portion adapted to displace a member carried on the latch bolt into locking engagement with the latch casing. The latch bolt comprises a bifurcated plate 31, Fig. 2, having a latch head 23 recessed at 26 to receive the spring 27, the rear end of which bears on a recessed cross-bar 28 secured to the casing. Both the inside and outside handles may have cam members 41, 42, Fig. 8, between the inner faces of which the latch plate 31 is adapted to slide. The cams have centia bosses 44 mounted in openings in the casing walls. For normal retraction the nose portion 48, Fig. 2, of each cam is adapted to engage an abutment 49 on the latch bolt. Rotation of either cam in the opposite direction causes the thin end of the wedge to enter a tapered slot 59, Fig. 8, on the locking member 54 which is carried at the free end of a centering blade spring 55 and transversely movable to engage the projections 63, 65 in apertures 62, 64 in the side walls of the casing. In Fig. 8 the bolt is locked by the cam 41 which has displaced the locking member to engage the aperture 62. The other cam 42 cannot now be rotated as it is blocked in one direction by the locking member 54 and in the other by the abutment 49. The cams are retained in their locking positions by a sliding detent 66, Fig. 2, carried on a spring wire 67 and engaging notches 73, Fig. 8, in the inner faces.
Patent GB-595404-A (GB)
Title: Improvements in melting and handling magnesium and magnesium base alloys
IPC: C22B26/22
Filed: 1944-08-10
Abstract: In the production or handling of magnesium and magnesium base alloys the metal or alloys are melted or contained in the molten state in apparatus made of or lined with steel of the following composition: C up to 1.5 per cent, Mn 10-30.0 per cent, Fe together with normal-impurities being the remainder.  The steel may also contain: Cr up to 18.0 per cent, Si up to 2.6 per cent, Nb up to 2.0 per cent, Cu up to 1.0 per cent, Mo up to 2.0 per cent, Ni up to 3.0 per cent, N2 up to 0.3 per cent. Preferred steels contain 10-15 per cent of manganese with 0.8-1.5 per cent of carbon or 16-30 per cent of manganese with not more than 0.5 per cent of carbon.  A preferred range for chromium is 5-15 per cent.
Patent GB-220412-A (GB)
Title: Improvements in or relating to optical projection screen and also the method of lowering and rasing same
IPC: A63J1/02
Filed: 1923-06-12
Abstract: 220,412. Cawdery, J. W. June 12, 1923. Theatrical appliances.-An optical projection screen for use in theatres is adapted to be raised from the stage when not required, and has pivoted wings or flaps which, when the device is lowered on to the stage, swing forward into contact with one another so as to exclude all back lighting from the auditorium. The device consists of a wooden frame a on which the screen is mounted and to which side flaps or wings b, b<1>, b<2> are hinged. At the back of the frame, near its lower edge, legs c, are arranged to slide vertically through guides d, and these legs are connected by links e with the lower flap b'. Thus when the screen is lowered on to the stage, the upward movement of the legs c pushes the flap b<1> forwards into an inclined position, as shown in Fig. 2. The side flaps b<2> are connected to dead lines f which pass through holes g in the top flap b and are fixed on the grid above the stage. The weight of the frame coming into position on the stage causes these lines to tighten and draw the side flaps forwards to meet the top and bottom flaps. The flaps thus closed represent a picture frame and serve to exclude back lighting from the auditorium. Raising and lowering the screen. The gear for lifting the screen may be of the usual construction in which a counterweight, connected to a number of live lines r, Fig. 8, is formed by a frame m which is associated with a vertical guide k and carries a vertical bar n for receiving disc weights w or the like, a hauling rope u being provided for manipulating the gear. The vertical bar n is extended to pass through the frame m and is provided with a U-shaped member o which receives the ends of the lines r and the rope u, or carries pulleys around which they pass.
Patent GB-732189-A (GB)
Title: Process for the catalytic reforming of gasoline hydrocarbons
Inventor: COX MAURICE WILLIAM
IPC: B01J27/13
Filed: 1953-06-03
Abstract: A gasoline range hydrocarbon feed containing paraffins and naphthenes is reformed by subjecting it with hydrogen in the presence of a fixed bed of catalyst comprising alumina, combined halogen, and platinum or palladium to an elevated temperature and pressure at which hydrocracking of paraffins and dehydrogenation of naphthenes occurs, a halogen or halogen compound reactable with alumina being introduced during the reaction in such an amount that the hydrocracking activity of the catalyst is increased.  The catalyst may initially be free of halogen, the halogen content being furnished by introducing halogen or halogen compound at the conditions of reforming.  Preferred feeds are straight run or natural gasolines or naphtha fractions.  Halogen or halogen compounds specified are chlorine, bromine, hydrogen chloride, bromide, and fluoride, ammonium chloride, mono- and trichloracetic acids, carbon tetrachloride, chloroform, tert. butyl chloride and fluoride, cyclohexyl and isopropyl fluorides, and dichlordifluormethane.  They may be added alone or with the feedstock, continuously or intermittently.  The amount required can be determined for a multiple adiabatic reactor system by measuring the total temperature drop when a satisfactory product is obtained with fresh catalyst and adding halogen compound in amount to maintain this constant.  If the heat capacity of the reacting mixture is varied, the product of heat capacity and total temperature drop is kept constant.  The amount of halogen compound is usually equivalent to less than 0.5 g. halogen/kg. hydrocarbons and may be controlled to restore lost hydrocracking activity to maintain this constant or maintain hydrocracking and dehydrogenating activity in balance. Lowering of hydrocracking activity by addition of water or compounds liberating it can be compensated for by addition of halogen compound. Reforming conditions are: temperature 400-540 DEG  C., pressure 3.5-80, preferably at least 15 atmos., weight hourly space velocity 0.2-40, hydrogen charge 0.5-15 mols./mol. hydrocarbon.  The catalyst may be prepared by mixing colloidal platinic sulphide with a slurry of precipitated alumina to which hydrogen fluoride or chloride or ammonium chloride has been added, drying, and calcining or reducing prior to use.  The platinum content is usually 0.05-1.5, and the halogen content less than 3 per cent by weight.  In an example, a straight run naphtha is reformed with and without added tert. butyl chloride.  An amount of 0.1-0.2 c.c. per litre of feed is suitable, an increase to 0.5 c.c. causing carbon to deposit unless the hydrogen partial pressure is increased.
Patent GB-878308-A (GB)
Title: Means for maintaining the shovel of an overthrow shovel parallel to the ground
IPC: F15B11/20
Filed: 1959-05-05
Abstract: 878,308. Shovelling machines. BARTH, H., MEILLER, F. X., MEILLER, F. X., MEILLER, M., and MEYER, M., [trading as MEILLER, FAHRZEUG-UND MASCHINENFABRIK KOMM.- GES., FRANZ, XAVER]. May 5,1959 [Oct. 16, 1958], No. 15350/59. Class 68(1). The scoop of an overthrow shovelling machine is maintained level to the horizontal as the supporting arms of the scoop are swung vertically by a jack or jacks 6 pivotally connected between the scoop and the arms, said jack or jacks being supplied with liquid under pressure from the exhaust side of the cylinder(s) of the jack(s) 4 acting between the arms and the chassis of the machine to swing the arms vertically. Cams 18 on the bearing trunnions 11 of the latter jack(s) 4 control a slide valve 15 so that during the initial swinging of the arms from the loading to the discharge position the exhaust side of the cylinder(s) of the jack(s) 4 discharge to the reservoir 14 of the machine's hydraulic system and not to the first jack(s) 6. Specification 874,687 is referred to.
Patent GB-809113-A (GB)
Title: Synthesis of steroids
IPC: C07J75/00
Filed: 1955-05-27
Abstract: The invention comprises pregnanes of the general formula <FORM:0809113/IV (b)/1> (wherein the 4,5-position is saturated or double-bonded, R is hydrogen and R1 is hydroxy, or together R and R1 represent a keto group or a group convertible thereto by acid hydrolysis, Z is hydrogen or hydroxy, X is a halogen atom and Y is bromine or chlorine), a process for the preparation of a 9a -halo-11b -hydroxy-steroid of the pregnane series by reacting a 21-chloro- or bromo- D 9(11)-steroid with an N-bromamide or N-chloramide (including imide) of a carboxylic acid (or a derivative thereof) or with dibromo- or dichloro-dimethylhydantoin, which acts as a hydroxybrominating or hydroxychlorinating agent to form the corresponding 21-chloro- or 21-bromo-11b -hydroxy-9a -halo steroid (halo being chloro- or bromo-), and also a process for producing a 21 - chloro - 9a  - halo - 11b  - hydroxy steroid of the pregnane series by reacting a 9b ,11b  - oxido - 21 - chloro steroid with a hydrogen halide (including HF and HI).  In examples: (1) 21-bromo- D 4,9(11)-pregnadien-17a -ol-3,20-dione is treated with N-bromacetamide and HClO4 giving 9a ,21-dibromo- D 4-pregnene-17a ,11b -diol-3,20-dione; (2) 21-chloro- D 4,9,(11)-pregnadien - 17a  - ol - 3,20 - dione as in (1) yields 9a  - bromo - 21 - chloro - D 4 - pregnene-11b ,17a  - diol - 3,20 - dione; using dichlorodimethylhydantoin as the reagent the corresponding 9a  - chloro - 21 - bromo - and 9a ,21 - dichloro - D 4 - pregnene - 11b ,17a  - diol - 3,20-diones are similarly prepared; (3) 21-chloro-9b ,11b  - oxido - D 4 - pregnen - 17a  - ol - 3,20 - dione is treated with anhydrous HF, giving 9a -fluoro-21 - chloro - D 4 - pregnene - 11b ,17a  - diol - 3,20-dione; whilst (4) treatment with HI in chloroform gives 9a  - iodo - 21 - chloro - D 4 - pregnene - 11b ,17a - diol - 3,20 - dione.  The 21-chloro - 9a  - halo - D - - prenen - 11b  - ol - 3,20-diones are likewise prepared.  Starting materials. 21 - Chloro - 9b ,11b -oxido - D 4 - pregnen - 17a  - ol - 3,20 - dione and the corresponding 17a -unsubstituted compound are prepared by reacting 9a -bromo-21-chloro-D 4 - pregnene - 11b ,17a  - diol - 3,20 - dione or 11b  - ol - 3,20 - dione with ethanolic potassium acetate.  Specifications 792,223, 792,224 and 809,114 are referred to.