baber/WOPTO huggingface dataset:
Patent GB-846001-A (GB)
Title: Improvements in or relating to the production of aluminium phosphate
IPC: C01B25/36
Filed: 1956-11-07
Abstract: An aqueous solution of an aluminium salt, calcium phosphate, associated impurities and sufficient free mineral acid to react with any calcium compounds present other than tricalcium phosphate, are superheated, if desired after separation of insoluble material, whereby tertiary aluminium orthophosphate is precipitated.  The salts specifically referred to are aluminium chloride, nitrate, nitrite, sulphate and bisulphite; they may be obtained by acid decomposition of e.g. clays, leucite, alunite (basic potassium aluminium sulphate) and pseudowavellite (impure aluminium phosphate).  The calcium phosphate used is preferably a natural rock phosphate.  If the calcium phosphate contains calcium in other forms, an amount of the aluminium salt above that necessary to form aluminium phosphate may be employed, whereby such impurities as gypsum and sand are left undissolved and may be separated from the aluminium phosphate which dissolves and is subsequently precipitated by superheating the solution, if desired after dilution.  The mother liquor from the final precipitation may be recirculated: where aluminium salts forming soluble calcium salts are used in the initial solution, the mother liquor may be worked up by adding a further quantity of crude phosphate, preferably of high purity and obtaining a second crop of aluminium phosphate, or alternatively the mother liquor may be reacted with sulphuric acid or aluminium sulphate and the resulting solution containing an aluminium salt recycled after removal of gypsum.  It may alternatively be desirable, where aluminium nitrate is used, to recover calcium nitrate as such for use as a fertiliser. The initial solution may contain aluminium salts forming both soluble and insoluble calcium salts, e.g. a mixture of aluminium sulphate and aluminium chloride and/or nitrate: sufficient phosphate should then be added to react to form calcium sulphate which precipitates and aluminium phosphate which dissolves.  In the case of raw aluminiferous material containing iron, a part (up to 80%) of the calcium phosphate may first be added and heated at up to 250 DEG C. e.g. in an autoclave to precipitate the iron, which is separated, and the remainder then added for reaction to form aluminium phosphate. In the case of pseudowavellite, the iron may be precipitated as phosphate from the acid decomposition solution by heating before reaction with calcium phosphate.  A number of examples is given: in Example 11, the mixture subjected to superheating contains an aluminium salt, calcium and phosphate, which are derived from a single mineral, pseudowavellite.  The aluminium phosphate obtained according to the invention may if desired be dissolved in caustic soda or a sodium aluminate lye produced by the Bayer process to produce sodium phosphate and sodium aluminate.
Patent GB-1398379-A (GB)
Title: Pattern drum for knitting machines
IPC: D04B15/74
Filed: 1972-06-16
Abstract: 1398379 Knitting machines; pattern drums FOUQUET-WERK FRAUZ & PLANCK 16 June 1972 [21 June 1971] 34114/74 Divided out of 1389694 Heading D1C A pattern drum for circular knitting machines has removable segments 28 received in longitudinal slots in a core 31, each segment having slots in its side to accommodate pattern pins. A springy comb-like strip 30 is attached to the first part of the segment 29 to retain the pins in place.
Patent GB-343025-A (GB)
Title: Process for minimizing the formation of scale and similar deposits in steam boilers,evaporators, condensers, boiling pans, collers and the like
IPC: C02F1/48
Filed: 1929-11-08
Abstract: 343,025. Preventing and removing incrustation in boilers &c. THALHOFER, W., Schaan, near Buchs, Liechtenstein. Nov. 8, 1929, No. 34137. Convention date, Dec. 1, 1928. [Class 123 (i).] The formation of scale in steam boilers, evaporators, condensers, boiling pans, coolers, and the like is prevented from exceeding a certain minimum thickness by the periodical addition of any suitable scale-removing chemical, alternating, at periods of not less than one week, with the periodical addition of any other scale-removing chemical, or any electrical treatment. In some cases, colloidal substances, e.g. the alkali salt of an amino acid, lignine, or lignine sulphonic acid, and adsorbents such as active charcoal, graphite, or kieselguhr may also be added.
Patent GB-485736-A (GB)
Title: Improvements in and relating to sliding gates for lock basins and the like
IPC: E02B7/20
Filed: 1937-12-09
Abstract: 485,736. Sluice gates. MASCHINENFABRIK AUGSBURG-NURNBERG AKT.- GES. Dec. 9, 1937, No. 34161. Convention date, Dec. 9, 1936. [Class 68 (ii)] Horizontally sliding lock gates are constructed with means for providing a roadway on the top when they are closed consisting of a train of carriage-like elements c<1>-c<5> pivoted together and supported on rollers c, the end carriage c<1> being pivoted to the forward end of the gate a so that, on the gate being run into the gate chamber b, the elements are pushed on to the top of the gate chamber cover b<1> which forms one of the approach roads. The rollers e run up the ramp g on to the cover b. A<1> section c<6> hinged to the end element c5 closes the gap over the ramp when the gate is closed.
Patent GB-193581-A (GB)
Title: Improvements in and relating to methods of making glass receptacles
IPC: H01J5/18
Filed: 1921-12-19
Abstract: 193,581. British Thomson - - Houston Co., Ltd., (General Electric Co.). Dec. 19, 1921. R÷ntgen-ray tubes.- In the manufacture of R÷ntgen-ray bulbs having windows differing in thickness. composition, or other respects from the main receptacle, the bulb is gradually heated in an enclosed space nearly to the softening point,. and the window, also while heated, placed in position, the region of contact being then fused. The parts are previously fitted by grinding &c. The apparatus comprises a rotatable oven 5 fitted with a removable cover 8. The bulb, which is made of lead glass, previously heated to about 450‹ C., is placed in the oven, the arms 10, 11 being locked by spring fingers 16, 17. The temperature is raised to about 470‹ C. when the previously heated window made of lime glass is placed in position and held therein by a pad of refractory material. The oven is then rotated, a pointed flame being- applied to the edges of the window.
Patent GB-797207-A (GB)
Title: Improvements in the manufacture of electric incandescent lamps
IPC: H03K3/35
Filed: 1954-11-25
Abstract: 797,207. Electric incandescent lamps. EGYESULT IZZOLAMPA ES VILLAMOSSAGI R. T. Nov. 25, 1954 [Dec. 5, 1953] No. 34203/54. Class 39(2) A selected part of the interior surface of an elec tric incandescent lamp bulb is provided with an opaque coating having a substantially sharply de fined boundary by mount ing within the bulb a metal platform or cup 1( Supporting a quantity of getter metal which is volatilized, e.g. by high frequency induction or by heat from a separate heating spiral within the lamp, the platform or cup 10 being shaped to direct the volatilized metal on to the part to be coated, a disc 14, preferably of mica, being mounted beneath the plate or cup for screening the remaining part of the bulb from deposition of the getter metal. The bulb is exhausted prior to the heating of the metal plate, and the process may be applied to a normal lamp making operation by disconnecting the bulb from the exhausting apparatus during the volatilization of the getter. The example shows part of a projector lamp with the upper end of the bulb provided with an opaque internal coating. The coating may consist of a single getter metal or a plurality of metals such as barium, iron, or titanium, at least one of which acts as a getter. Getter metals. which are difficult to volatilize may be supported on a thin metal disc relatively smaller in size than the plate or cup 10 in order that they may be heated more readily by high frequency current. Specification 695,081 is referred to.
Patent GB-968047-A (GB)
Title: Traverse mechanism for high speed winding of yarns
Inventor: SEAR STUART BERNARD
IPC: B65H54/28
Filed: 1962-09-06
Abstract: In a yarn winding traverse mechanism in which a yarn guide is reciprocated by means of a cam and follower the follower is arranged to strike the face of a gas-pressurised diaphragm at each end of the traversing stroke in order to provide rapid reversal of direction. By this means high traversing speeds e.g. of the order of 1500 cycles/minute may be achieved.  Each diaphragm is preferably secured by a clamping plate having a central hole aligned with the path of the follower and the diaphragm is preferably formed of at least one layer of synthetic rubber impregnated sail cloth sandwiched between two thin rubber films of high wear resistance.  An example is quoted in which the gas pressure on the diaphragm is maintained between 60 and 70 pounds per square inch.  Specifications 714,032 and 874,651 are referred to.
Patent GB-467411-A (GB)
Title: Improvements in or relating to lamps for shop window illumination
IPC: F21V7/04
Filed: 1935-12-11
Abstract: 467,411. Trough - shaped reflectors. HYMAN, L., OUGHTON, W. E., and HYMAN, B. E. Dec. 11, 1935, No. 34284. [Classes 75 (ii) and 75 (iv)] In order to provide ventilation and at the same time to preserve continuity of reflection, trough-shaped reflectors are made with central apertures covered by additional reflectors 6. In a modification, the reflector 6 is half in and half outside the trough.
Patent GB-471714-A (GB)
Title: Improvements in or relating to valves
IPC: F16K31/524
Filed: 1936-12-15
Abstract: 471,714. Valves. WEINNERBY, A. O. L. Dec. 15, 1936, No. 34459. [Class 135] A straight - through valve comprises two closure members 7 pivoted at 6 on lugs 5 and rocked in either direction by contact with grooves 11, 12 in a doubly conical nut 13 travelling along a screwed portion of the spindle 14, which spindle is held against axial movement.
Patent GB-997199-A (GB)
Title: Semiconductor switching circuits
IPC: F02P3/04
Filed: 1961-09-26
Abstract: 997,199. Ignition systems. TEXAS INSTRUMENTS Inc. Sept. 26, 1961 [Oct. 6, 1960], No. 34509/61. Heading F1B. [Also in Division H3] In a pulse generating circuit, e.g. for a car ignition system, opening a switch 70, Fig. 5, switches on a semiconductor switching device, e.g. SCR 62, to allow current to flow through the inductor 55. Closure of switch 70 causes the energy stored in inductor 55 to charge up capacitor 56 to a voltage higher than the supply Eb. Subsequent opening to switch 70 discharges capacitor 56 through transformer 60 producing a short high voltage pulse in the secondary winding 59. The SCR 62 is of the type having a high hold current so that closure of switch 70 extinguishes it. The SCR may be replaced by a transistor, Fig. 7 (not shown). If current through the SCR exceeds the hold current, the circuit is modified as shown in Fig. 6. When switch 70 first opens capacitor 57 charges and in so doing fires SCR 80. Capacitor 56 then charges through resistor 52 and SCR 80. On closing switch 70, the right hand plates of capacitors 56, 57 are taken to earth thus taking the electrodes 81, 83 of SCR 80 below earth to extinguish it. In another modification, Fig. 9, two SCR's 100, 104 are used in co-operation, SCR 104 co-operating with switch 70 to turn SCR 100 on or off. In this arrangement SCR 100 is of the type having a low hold current, and requires turning off, whilst SCR 104 has a higher hold current and is self-extinguished when its gate returns to earth potential. The circuit also includes a further inductor 109 providing a larger charge on capacitor 56. This inductor may be omitted, Fig. 8 (not shown). The circuit of Fig. 9 may also be modified to use two SCR which require turning off by the addition of a diode shunting the anode-cathode path of SCR 104 Fig. 10 (not shown).
Patent GB-1447153-A (GB)
Title: Dilatant and rheopectic copolymer dispersions and process for  their manufacture
IPC: C08F2/16
Filed: 1974-08-06
Abstract: 1447153 Polymer dispersions HOECHST AG 6 Aug 1974 [10 Aug 1973] 34595/74 Heading C3P Dilatant or rheopectic polymer dispersions are obtained by free radical copolymerization of a monomer mixture of (a) 10-90% of a monomer the homopolymer of which has a second order transition temperature of 50-150‹ C., (b) 0 to 60% of a monomer the homopolymer of which has s second order transition temperature of - 100‹ to 50‹ C., (c) 5-30% of an alpha, beta ethylenically unsaturated carboxylic acid and (d) 0À5-8% of a mercapto compound in an aqueous phase at 30-95‹ C. in the presence of up to 2% based on the weight of (a), (b), (c) and (d) of an ionic emulsifier, preferably added incrementally, using 30-55% of water based on total monomers wherein 60-80% of the monomer mixture is first polymerized to obtain a dispersion of solids content 52-65% and adding the remaining monomers at a rate such that the content of unreacted monomer in the reaction mixture is below 5g./litre and continuing until all monomers have polymerized. In examples are used (a) methyl methacrylate, or styrene, (b) butyl and ethyl acrylates or absent, (c) methacrylic acid, (d) dodecyl mercaptan, n-dodecyl mercaptoacetate or glycol di-mercaptoacetate using no emulsifier or sodium lauryl sulphate or a mixture of sodium alkyl aryl polyglycol ether sulphate and alkyl polyglycol ether sulphate in the presence of a redox initiator. The polymer may be recovered as a powder which can be redispersed to give dispersions which are still dilatant or rheopectic.
Patent GB-400442-A (GB)
Title: Method of manufacturing tubing for fountain pen barrels and like articles
IPC: B31C3/00
Filed: 1932-12-07
Abstract: 400,442. Cellulose tubes. CELLULOID CORPORATION, 290, Ferry Street, Newark, New Jersey, U.S.A. Dec. 7, 1932, No. 34717. Convention date, Dec. 7, 1931. [Class 99 (ii).] A tube of cellulose acetate or other cellulose derivative material is formed by first winding helically a strip 10 of the material about a mandrel 2 disposed within a tank 1 containing boiling water, then immersing the wound strip or coil, together with the mandrel, into cold water to cause it to set, then removing the coil and immersing it in a bath of acetone or other solvent where it is slightly untwisted to cause separation of its adjacent helical edges and facilitate application of the solvent thereto, and finally giving the coil a slight positive twist, removing it from the bath, and allowing it to dry. The strip is of substantially rectangular cross section, and it may be composed of two or more layers of material differing in composition and appearance. The invention is particularly applicable to the manufacture of fountain-pen barrels and caps.
Patent GB-1128940-A (GB)
Title: Printed circuit assembly
Inventor: CUZNER DAVID EVERARD
IPC: H05K7/20
Filed: 1967-07-28
Abstract: 1,128,940. Printed circuit assemblies. INTERNATIONAL BUSINESS MACHINES CORP. 28 July, 1967, No. 34758/67. Heading H1R. [Also in Division H2] A circuit assembly comprises a plurality of sub-assemblies 6, 7, 8, 9 (Fig. 1, not shown) each including a plurality of printed circuit cards 12 to 15 which support and provide interconnections between a plurality of integrated circuit modules 22 (Fig. 3) and Fig. 2 (not shown), arranged around an aperture 26 in each card, through which aperture extends an air distribution tube 11 formed by four multi-layer printed circuit cards 32 (Fig. 5) carrying printed wiring interconnecting the printed circuit cards 12 to 15. As shown Fig. 7, between each pair of adjacent cards is a spacer 36, 37. Spring fingers 51 are soldered to printed lands at the edges of the apertures 26 of the cards 12 to 17. When assembling the cards and spacers axially on to the tube 11, the fingers do not exert much pressure thereon. Camming surfaces 54 on the spacers 36, 37 however, press the fingers 51 against the tube lands 33 (Fig. 5), as axial force is applied to the stack of cards and spacers by a screw 43 on a tie-bar 40 acting on an end cap 41. Printed circuit interconnection cards 16, 17 which may or may not carry modules provide input/output connections to the circuit assembly. Printed lands around the central aperture S of 16, 17 are connected by the spring fingers to the printed circuit tube, and are connected to lands around their outer edges. The outer edge lands of cards 16, 17 are connected by conventional connectors and tape cables to the interconnection cards of the other sub-assemblies (Fig. 1, not shown). The micro-modules 22 (Fig. 2, not shown) each comprise integrated circuits on a substrate and encapsulated in a metal can. Electrical connection pins, projecting from the substrate, are soldered into holes in the printed circuit cards. Cooling air from a fan passes through the tubes 11, out through apertures therein, which register with the spaces between the cards, and across the micro-modules. Plated holes and strips are provided at the outer edges of each card and are connected to the circuitry for testing purposes.
Patent GB-1236126-A (GB)
Title: Improvements in or relating to welding
Inventor: BRAID MURRAY DOUGLAS
IPC: B23K20/12
Filed: 1969-07-10
Abstract: 1,236,126. Making valves; welding by pressure. TRW Inc. 10 July, 1969, No. 34782/69. Headings B3A and B3R. In butt welding two elements, one element is rotated relatively to the other while the elements are coaxially aligned, the elements are brought into rubbing contact and a welding current is passed through them, the relative rotation being terminated when welding temperature is reached. A headed valve stem 10 is held against rotation in an insulated movable clamp 13 and an oppositely arranged headed valve stem 18 is held against rotation in another insulated movable clamp 22. A valve tip 24 to be welded to stem 10 and valve tip 26 to be welded to stem 18 are held between the clamps 13, 22 in a conductive clamp 27 carried in a shaft 28 rotatable in bearings 31, 32 by means of gear teeth 33. An insulating spacer 29 is arranged between the tips 24, 26. In operation the tips 24, 26 are rotated and pressure is applied by rods 43, 44 to move the stems 12, 21 into contact with the tips, current is then supplied by a transformer 39 to the clamps 13, 22 to pass in series through the stems and tips causing resistance heating at the joints and when welding temperature is reached the spindle 28 is braked and current flow stopped. After welding the unit may be moved to another position and driven to allow machining of flash possibly after flash annealing. In a modification the single spindle 28 is replaced by two spaced spindles which carry a common single tip piece which is welded to the two valve stems using increased pressure for upsetting. The assembly is then moved to another station where a cutting wheel fits between the spindles to cut the single tip into two. Stems may be welded to heads and the stems may be hollow or of different metal from the valve head.
Patent GB-1485156-A (GB)
Title: Radiating line telecommunication systems
IPC: H04B5/00
Filed: 1974-08-07
Abstract: 1485156 Radiating line telecommunication systems COAL INDUSTRY (PATENTS) Ltd 16 May 1975 [7 Aug 1974] 34805/74 Heading H4L A telecommunication system, e.g. for a mine, comprises a base station joined to a radiating line having at least one repeater K and a mobile station D, a further length of radiating line M or N being connected to the line adjacent and on one side of a repeater and extending substantially parallel with the first line on the other side thereof, whereby the variation of signal strength along the line may be reduced. In the embcdiment illustrated H is a transmitter and J a receiver, the repeaters being unidirectional. In the absence of the lengths of line M, N the strength of, e.g. a received signal at D would vary between a maximum near to the output of a repeater and a minimum near to the input of a repeater, Fig. 2(b) (not shown). The lengths of line M, which extend no more than halfway between adjacent repeaters, cause the signal strength to increase from the halfway point, Fig. 2d. The lengths of line N have a similar effect on signals transmitted by D and received by J. If the adjacent free ends of lines M, N are coupled by chokes (P), Fig. 2(e) (not shown), a continuous path for supply currents may be provided between terminals (R, S) near H, J respectively. In another embodiment, Fig. 1(c) (not shown), the base station (A) comprises both transmitter and receiver, and the repeaters (C) are two-way. Further lengths of line (F) connected adjacent the repeaters (C) on the side remote from the base station suffice to reduce the variations of signals going either way, Fig. 1(d) (not shown). The input or output signal of a repeater is not necessarily equally divided between the main line and the further line.
Patent GB-173513-A (GB)
Title: Improvements relating to leather edge-finishing
IPC: C14B11/00
Filed: 1920-10-05
Abstract: 173,513. Merrick, F. W. Jan. 2, 1920, [Convention date]. Burnishing by compression.-The edge of upper leather and the like is burnished, while e the material is clamped at the extreme edge and held compressed in the direction of its thickness, by a burnishing action which carries the fibres towards the back of the material in the plane of its edge. The machine described comprises an annulus 1, mounted and rotating in an inclined plane, which supports and feeds the material a under a burnishing tool 2 carried on a shaft 3
 rotating at a high speed. The tool projects into the opening of the annulus and fits close up to the edge thereof, and is shaped so that the material is squeezed and creased by a circumferential ridge 2<c> and the marginal portion and edge are burnished by portions 2<a>, 2<b> respectively of the tool. An edgeguide which fits close to the edge of the tool and enters the opening in the annulus, and a presserwheel 4 are also provided. These parts are elements of the machine described in Specification 156,571. In use, the edge of the material is slightly inclined to the tool, so that it contacts only with the downwardly-moving portion thereof, which therefore carries the fibres towards the back of the material in the plane of its edge.
Patent GB-205741-A (GB)
Title: Improvements relating to punching devices for tickets and the like
IPC: B26F1/32
Filed: 1922-12-21
Abstract: 205,741. Graseby, R. C. Dec. 21, 1922. Ticket clips and punches. -A ticket punch comprises a casing containing a spring retracted punch 17 sliding in end guides 9, 4, pivoted on a pin 3 to a base-plate 2. An operating bell-crank 19 pivoted to the casing is connected by links 13 to a cross-head 14 carried by the punch. The casing normally lies out of the vertical, a ticket being punched by inserting it into an opening 10 in a die plate 11 and swinging the casing towards the base plate. The device may be fitted with a counter or register.
Patent GB-377557-A (GB)
Title: Improvements in suspenders for lamps
IPC: F21S8/06
Filed: 1931-12-17
Abstract: 377,557. Suspending lamps. MÍBIUS, F., 22, Wasserstrasse, Bernburg, Germany. Dec. 17, 1931, No. 34989. [Class 75 (iii).] A lamp is suspended from two or more transverse cables, placed one above another, by means ot a hanger navmg struts whereby it is fixed to two or more parts of each cable so that the struts and the cable portions between them constitute a substantially rigid structure, thereby preventing undue swaying of the lamp. In one form, the cap 10 of a lamp 5, Fig. 2, is fixed to a clamp 11 on a lower cable 2 and upwardly divergent struts 3, 4 are secured by clamps 12 to an upper cable 1. In a second form, the lamp is disposed between the cables, the lamp cap being secured on opposite sides to struts extending between the cables. In a third form, crossed struts 19, Fig. 6, are fixed on rigid tubes 18, slipped on to the cables and secured by fastenings 21. The tubes may be partly flattened and the length of free cable may be further reduced by fixing tubes 23 to the supporting walls or posts with the end portions of the cables passing through the tubes and attached thereto by fastenings 24.