baber/WOPTO huggingface dataset:
Patent GB-464370-A (GB)
Title: Improvements in and relating to processes for the purification of crude phosphoric acid
IPC: C01B25/234
Filed: 1936-04-24
Abstract: Pure phosphoric acid is obtained from an aqueous solution of the crude acid, which may also contain other acids such as sulphuric acid, by dissolving the crude aqueous acid in a water-miscible organic solvent in the presence of small quantities of an alkali metal or ammonium compound, freeing the resulting solution from precipitated impurities and removing the solvent from the phosphoric acid.  Suitable organic solvents are 92 per cent ethyl alcohol, methylated spirit or acetone.  Suitable alkali metal or ammonium compounds are sulphates, oxalates, phosphates, carbonates, chlorides or nitrates of potassium, sodium or ammonium, alkaline lyes or combinations of the above compounds. The above additions may be introduced during the preparation of the crude phosphoric acid from crude phosphate or its decomposition products or as a concentrated solution or in a finely pulverized state before or after the addition of the solvent.  The precipitated residue may be treated with water, the impurities remaining undissolved or being converted into insoluble basic salts while the alkaline compounds and the phosphoric acid are dissolved.  The resulting solution may then be used for the repeated purification of phosphoric acid.  The phosphoric acid after the removal of the solvent by distillation may be further purified by treatment with activated carbon.
Patent GB-131113-A (GB)
Title: Improvements in Telephone Repeater Systems.
Inventor: ROBINSON CHARLES
IPC: H03F3/64
Filed: 1918-07-17
Abstract: 131,113. Robinson, C., and Chamney, R. M. July 17, 1918. Telephonic repeaters.-A repeater is connected to a telephone circuit by means of a transformer C having its primary winding, preferably in series with a condenser, connected in shunt across the line and having its secondary winding connected to one side of the repeater, the other side of which is connected to a suitable. balancing-circuit D. In the valve repeate described, the grid circuit of the valve V is connected to the secondary of a differential transformer A, of which one side is connected to the balancing-circuit D and the other to the secondary of transformer C. The centre points of the differential transformer A are connected to one coil of a transformer B, the other winding of which is connected to the plate circuit of the valve. The amplified currents from the valve divide at the centre points of the differential transformer, part passing to line and part to the balancing-circuit. If the balance is correct, the amplified currents will have no effect upon the repeated. With a microphonic repeater, the differential transformer A may be replaced by a differential arrangement of inductances, resistances, or condensers
Patent GB-376399-A (GB)
Title: Spring mattress
IPC: A47C23/12
Filed: 1931-04-20
Abstract: 376,399. Mattresses. KLUTE, E., 13, Flurstrasse, Hagen, Germany. April 20, 1931, No. 11710. Convention date, Sept. 24, 1930. [Class 52 (iv).] The upper coils of an assembly of upholstery springs d are resiliently interconneeted by spring bands c consisting of spiral springs wound with a large pitch and pressed flat. In the preferred arrangement the rows of upholstery springs alternate transversely with rhombiform elements e made of the pressed spring bands, and are separated longitudinally by longitudinal bands.
Patent GB-1108569-A (GB)
Title: Meshing screw compressor
IPC: F01C1/16
Filed: 1965-03-19
Abstract: 1,108,569. Rotary compressors. SVENSKA ROTOR MASKINER AKTIEBOLAG. March 19, 1965 [March 20, 1964], No.11727/65. Heading F1F. A rotary compressor of the meshing-screw type comprises a pair of male and female screwrotors 36, 38, Figs.1 and 2, and a part-cylindrical recess 64 containing a valve-member 86 that is axially movable between a fixed portion 70 of the casing 20 and an axially-orientated port 32 at the high-pressure end of said casing so as to regulate the mass flow of gas through the machine substantially without affecting the inlet and outlet pressures. When the valve member is moved by rotation of a screw 98, the axial width of a radiallyorientated port is changed, which port is defined by the edges of the recess 64, an end-face 92 of the valve-member and an end-wall 56 of the casing 20, a corresponding change being effected simultaneously in the axial width of a bleed port 94 between an end-face 90 of the valve-member and the aforesaid portion 70. The bleed port is connected to an inlet channel 26 by a channel (74), Fig.3 (not shown), which is within the portion 70 of the casing. Lubricating oil enters a chamber (103) within the valve-member through a pipe 102 and is thence distributed through passages 120, 124, 126 and bores (116), Fig.5 (not shown), through which bores oil is injected into the grooves 40, 46 in the rotors. Oil escaping from bearings 54, 58 drains into the channel 26 through an opening 55 and channels 59, respectively. Two other embodiments of the compressor, Figs.6 to 8 and Figs.9 to 12 (not shown), differ from that shown chiefly in respect of the crosssectional profiles of the valve-member and the associated recess as well as their location relative to the rotors. In the second of these two embodiments, a further valve-member (220) is lodged in the end wall of the casing containing the port 32, this valve-member being axiallymovable within a bore (222) against the action of a compression spring (224), which bore communicates with the said port, so that the effective size of the latter is increased whenever the bleed port is closed either partially or wholly. In the embodiment according to Figs.6 to 8, the pipe 102 and the associated chamber, passages and bores within the first said valve-member are dispensed with.
Patent GB-1209819-A (GB)
Title: Improvements in fastenings
Inventor: BARTLETT RONALD VICTOR
IPC: A47B57/56
Filed: 1968-03-11
Abstract: 1,209,819. Shelf brackets. VENESTA INTERNATIONAL CONSTRUCTION MATERIALS (U.K. DIVISION) Ltd. 5 March, 1969 [11 March, 1968], No. 11752/68. Heading A4B. [Also in Divisions E1 and E2] A shelf bracket 9 is secured to a flange 10 of an I-section pillar 11 by a fastener comprising two identical clamping blocks 1 interconnected by screws 6, each block 1 being rebated to define a jaw 1a and provided with a pair of spaced ribs 3, 4 of which one rib 3 is collapsible under load, the arrangement being such that the bracket 9 has a vertical web clamped between the blocks 1 with the ribs 4 bearing on opposite sides of the web and that on tightening the screws 6 the blocks 1 pivot about the ribs 4 to collapse the other ribs 3 against the bracket web and clamp the pillar flange 10 between the jaws 1a. The screws 6 extend through holes 12 in the bracket web. The jaws 1a have teeth 2, the outermost 2a of which is taller than the remainder so that it engages behind the flange 10.
Patent GB-373363-A (GB)
Title: Method of and means for starting the spinning of threads with centrifugal spinning machines
IPC: D01D7/02
Filed: 1931-04-22
Abstract: 373,363. Centrifugal spinning- machines, particularly those with drawing-rollers for staple fibre. SIEMENSSCHUCKERTWERKE AKT.-GES., Siemensstadt, Berlin. April 22, 1931, No. 11930. Convention date, May 7, 1930. [Class 120 (ii).] To facilitate starting in centrifugal spinning- machines, particularly those for roving suitable for drawing and provided with drawing-rollers, such as are used :for staple fibre, an auxiliary thread 6 from a supply bobbin 5 is passed through the guide funnel into the can 4 and led between the delivery rollers 2, so as to convey the thread or roving into the can, and is broken off when normal twisting is ensured. The supply bobbin 5 may be mounted on the machine or may be carried by the operative. Guides 8 may be mounted adjacent to the rollers which may be overhung and provided with stationary rounded ends 10 to facilitate the leading of the auxiliary thread, and, in order that the auxiliary thread may be easily found and removed in subsequent reeling, it may be suitably coloured.
Patent GB-829785-A (GB)
Title: Control valve for a pneumatic conduit system
IPC: F16K27/04
Filed: 1956-04-19
Abstract: 829,785. Valves. DE VRIES, C. April 19, 1956 [April 20, 1955], No. 11935/56. Class 135. In a valve comprising a valve body having a plurality of transverse connections communicating through ports with a longitudinal bore accommodating a movable plunger having a number of spaced lands on each of which is carried a packing-ring so that on movement of the plunger the ports may be selectively interconnected, the valve body is composed of two or more parts whose adjacent, abutting, faces lie transversely of the bore and in one or both of which is formed a recess surrounding the bore to provide a port open to communication with a transverse connection. As shown in Fig. 2, body parts 2, 2<SP>1</SP> and 26 and end-plates 3 and 4 are secured together by bolts 5 and a plunger 7 having an enlarged head 8 engageable by a spring 10 and pressed downwardly either manually, mechanically, electrically or pneumatically is slidable in a longitudinal bore 6. The body part 26 is formed with an inlet connection 31 communicating with a compressed air source and shallow recesses 27 surrounded by - deeper recesses 29 on its end faces whilst the body parts 2, 2<SP>1</SP> are each formed with a connection 11 leading to atmosphere and radially opposite a connection 12 connected to a double-acting motor and through a duct 14 with the corresponding recess 29 of the body part 26. As shown, compressed air is supplied through the upper connection 12 and exhausted through the lower. On pressing the plunger down these connections are reversed. The upper face of the body part 26 may be made plane and the body part 2<SP>1</SP> dispensed with to provide a three-connection valve or other body parts may be added to increase the number of connections. In a modification, recesses 33, 34, Fig. 3, may be formed in the body parts 2, 21 and recessed washers 35, 36 having a plurality of holes 37 fitted therein to increase the area opening into the bore 6.
Patent GB-384539-A (GB)
Title: Improvements in or relating to dynamo-electric machines
IPC: H02K3/32
Filed: 1932-04-26
Abstract: 384,539. Dynamo-electric machines. SIEMENS-SCHUCKERTWERKE AKT.- GES., Siemensstadt, Berlin. April 26, 1932, No. 11967. Convention date, April 28, 1931. [Class 35.] Coils; insulation, cores.-In a machine wherein the highestvoltage conductors are placed at the centre of the slots, the slots are of double-wedge form and the lowervoltage insulated conductors which are disposed towards the top and bottom of the slots are of trapezoidal section and of approximately equal width. In the form shown, the lower-potential conductors 3, 4, 6, 7 may have U-shaped insulation 9, 10, whilst the .highest-voltage conductor 5 has a sheath 8. The heads 11 of alternate teeth may be detachable and may be secured by wooden or magnetic wedges 12, 13, or may be screwed on or secured by dovetail grooves. The invention is applicable to stators or rotors for direct- or alternating-current machines. Specification 376,270 is referred to.
Patent GB-637812-A (GB)
Title: Method and means for printing textile materials and the like by means of stencils
IPC: B41F15/08
Filed: 1947-05-03
Abstract: 637,812. Stencilling-apparatus. LINDAHL, K. A. T., HEINTGES, C. A., and JACOBS, J. P. W., [trading as HEINTGES, JACOBS, & CO.). May 3, 1947, No. 11986. Convention date, Oct. 17, 1946. [Class 100 (ii)] In apparatus for stencil printing a continuous strip of textile or other material fed stepwise longitudinally over a printing table, there is arranged laterally of the strip a stencil magazine from which stencils may be moved transversely of the direction of the strip to reach printing position, the strip being deflected adjacent one of the transverse edges of the table so that an operator can work closely adjacent said edge to apply printing colour by means of a longitudinally moving device, which thus in the case of textile materials moves in the warp direction thereof. The material is unwound from a roll 1 and is gripped by an intermittently driven endless web 5 to be fed stepwise over a glass table 6. Stencils 12 are held in frames 11 placed above each other in magazines 10 on either side of the table, hoisting means being provided to raise a required stencil to the level of rails extending laterally over the tables, on which rails the frames are moved on rollers 13 into operative position. Colour is applied by means of a squeegee by an operator on a platform 4, in the warp direction of the material, whereafter the stencil is transferred to the opposite magazine. The material is dried by heating elements 7 and then moved the width of a stencil in readiness for the next operation, and is then further dried by heaters 8, passing thereafter into a drying compartment 16 having a heater 17, and thence to a winding-up roller 18. The colouring may be done by mechanical means, and the material may be textile fabric, wallpaper or the like.
Patent GB-256332-A (GB)
Title: Improvements in or relating to electrical condensers
IPC: H01G5/06
Filed: 1925-05-08
Abstract: 256,332. Rowe, J. J. May 8, 1925. Condensers have means for moving the end vane of a series of fixed vanes relatively to the series both of fixed and moving vanes for fine adjustment purposes. The movable vane C is movable or deflectable with respect to the movable and fixed vanes A, B and, as shown, is mounted by one corner on a spindle C<1> passing through the pillar D, the latter being shortened and supported on end plates by means of a strap or bracket G. The end of the spindle C<1> enters a socket H and in addition to its pivotal movement the vane C may be moved away from the other vanes by giving the spindle a fine screw thread adapted to engage a thread in the socket H. The spindle C may be mounted alongside the pillar D instead of passing through it and may also have an index scale. In another form, the spindle C<1> may engage the free end of the vane C to deflect or move it.
Patent GB-1027206-A (GB)
Title: Mixer
IPC: B28C5/18
Filed: 1964-03-21
Abstract: A rotary drum mixer has a stand with a roller or rollers arranged to support and be rotated by a driving wheel of a road vehicle.  If the drum tilts to discharge it is driven from the roller(s) by a flexible shaft and a belt reduction gear; if the axis of the drum is horizontal and fixed the flexible shaft may be dispensed with, and the drum discharged by engaging reverse gear in the vehicle.
Patent GB-594335-A (GB)
Title: Improvements in or relating to knot tying devices
IPC: B65B13/26
Filed: 1945-05-14
Abstract: 594,335. Knot-tying devices. KOBLER & CO. May 14, 1945, No. 12107. Convention date, May 12, 1944. [Class 112] [Also in Groups XIV, XVII and XXV] A knot-tying device, particularly for tying thrum-knots for the carrying loops of parcels, comprises a bill provided with cutting and holding means and formed in two, or preferably three, parts, one of which is rigid with a base while the other, or each of the others, is movable and bears against the fixed part. In the arrangement shown a part 2 of the bill, semi-circular in section, is rigid with a base 23 adapted for clamping to a table, and two parts 3, quadrantal in section, are pivoted to the base on a common hinge-pin 7 and urged against the part 2 by spring-pressed balls 8; one of the parts 3 has a roughened surface to hold the string ends against a corresponding surface on the part 1, and the other carries an adjustable cutter blade 12 which enters a groove in the part 2. The base 23 has fixed to it a stud 19 which has at its lower end an arm 34, carrying a string receptacle 35, and an arm 29 carrying half of a wire basket for holding a parcel, the other half of the basket being; carried by an arm 30 pivoted on the stud 19 and spring-pressed to grip the parcel. The string- holder 35 has a spring-wire friction device 39 engaging the string. The knot is formed by looping the string round the bill as shown, drawing the ends down so that they are cut and held, and then stripping the loop off over the ends. The apparatus may be used simply as a string cutter and holder.
Patent GB-646607-A (GB)
Title: Method of and apparatus for separating liquid from a deformable material containing liquid
IPC: B30B9/20
Filed: 1948-05-04
Abstract: 646,607. Presses for separating liquids from solids. BJERKE, H. R. May 4, 1948, No. 12192. [Class 46] Liquid is separated from a deformable raw mass such as cellulose fibres, kieselguhr or diatomaceous earth by squeezing the mass between two, rollers 2, 3, of which roller 3 is provided with a covering of porous resilient material 9, 10 so that part of the liquid of the raw mass is pressed into the pores of the covering which is then pressed against a third roller 4 or between two rollers at a higher pressure than is used between rollers 2 and 3 to squeeze out the water taken up while passing between rollers 2 and 3. The covering 9, 10 consists of a layer 9 of resilient material, such as rubber, which is covered by felt or a manchon 10 consisting of thick woven wool felt. The raw mass is fed between the rollers 2, 3 from a hopper 6 having a rotary feed wheel 7. Doctors 11 and 14 are associated with the rollers 2 and 4 for removing solid material which adheres to these rollers. The pressure between rollers 2 and 3 is adjusted by means of weights 15 and that between rollers 3 and 4 by means of screw 17.
Patent GB-891437-A (GB)
Title: Improvements in or relating to electric filament lamps
IPC: H01K1/14
Filed: 1960-04-06
Abstract: 891,437. Incandescent electric lamps. PATENT-TREUHAND-GESELLSCHAFT FUR ELEKTRISCHE GLUHLAMPEN. April 6, 1960 [April 10, 1959], No. 12214/60. Drawings to Specification. Class 39(2) In a gas filled electric lamp of the type for general or domestic use having a coiled-coil tungsten filament mounted on support wires and having a voltage rating between 100 and 250 volts and a wattage rating between 15 and 200 watts, the filament being designed for a life of not less than 800 hours and an operating temperature of not less than 2000‹C. at the rated voltage, the filament is formed so that its primary core factor (defined as the ratio of the diameter of the mandrel on which the filament is wound to the diameter of the tungsten wire) and secondary core factor (defined as the ratio of the diameter of the mandrel on which the primary helix is wound to the diameter of the primary helix) both lie between 1À78 and 20, one of these core factors being greater than 3, the filament having no intermediate support unless the voltage rating is greater than 135 in which case a single intermediate support may be used. Preferably the primary core factor is between 3 and 12 and the secondary core factor is less than 2À5. During manufacture, the initial flashing of the filament may be effected in an atmosphere of or containing hydrogen and thereafter the filament is kept out of contact with oxygen or with any gas containing oxygen e.g. by connecting the bulb during processing continuously to the pump or by continuous flushing with oxygen free gas. The final gas filling may be a mixture of argon or argon and nitrogen with one per cent to five per cent by volume of hydrogen. Zirconium with or without aluminium may be used as a getter. The resulting lamps are stated to have an improved light output with a reduced tendency of the filament to sag.
Patent GB-555405-A (GB)
Title: Improvements in wallpaper trimming, pasting, and cross cutting machines
IPC: B44C7/02
Filed: 1942-08-31
Abstract: 555,405. Trimming and pasting wallpaper. LAYFIELD, J. M. Aug. 31, 1942, No. 12225. [Classes 31 (i) and 140] In a machine for trimming and pasting wallpaper and cutting the pasted paper into desired lengths, the roll of paper is mounted on a spindle a fitted with adjustable self-centring discs d for clamping the ends of a roll. The rod a is universally mounted at its left hand end in an adjustable bearing f carried by a bracket m adjustable horizontally by a screw s, and also adjustable vertically. The paper is drawn over a rod v, under a tensioning rod y, and over a rod w before passing to edge trimming discs x mounted on shafts a<SP>1</SP>, b' which are fitted with grip rollers c<SP>1</SP>, pressed together by spring-controlled bearing blocks, the shafts a', b<SP>1</SP> being rotated by the pull on the web. The rod y can slide freely in a slot z, and can be held out of action in a horizontal position of the slot when a new roll is being introduced. Adjustable transverse guides i' engage the edges of the web, and the selvedge removed is led away by guides g<SP>3</SP>. The trimmed paper passes between a lower pasting roller n<SP>1</SP> dipping in a tank, and an upper roller m' which is set at a distance from the roller n<SP>1</SP> which is adjustable by means of adjust-. able 'quadrant brackets s<SP>1</SP> with grooves of different sizes which support the spindle of the roller m<SP>1</SP>. The rollers m', n' have large teeth which ensure a driving connection at all adjustments. The width of paste applied to the web is limited by adjustable wipers engaging the edges only of the roller n<SP>1</SP>. The upper roller m<SP>1</SP> is geared to a screw x<SP>1</SP> with which a travelling nut y<SP>1</SP> engages, and the nut. starts from a fixed bracket f<SP>2</SP> and to stop the feed when the required length of web has been pasted the nut engages an adjustable stop, which is set by means of a gauge positioned alongside a fixed knife b<SP>3</SP>. The pasted web is then severed by a traversing spring-pressed cutter t<SP>2 </SP>which is moved across the web and cuts in co-action with knife b'. The pasted web may be lifted clear of the cutting-apparatus by means of a pivoted U- shaped rod v<SP>2</SP> and a spring-arm z<SP>2</SP> with grooved foot f<SP>3</SP> which grips the web against the rod v<SP>2</SP>. A pair of co-operating shearing discs may be mounted detachably in a slotted frame f<SP>3</SP>, Fig. 3, and comprises a pair of cutting discs combined with feeding rollers. The paper passes finally to a folding table i<SP>2</SP>, Fig. 15, mounted on brackets l<SP>2</SP> carried by rods m<SP>2</SP> adjustably supported in brackets j<SP>2</SP> carried by the halves k<SP>2</SP> of a box in which the apparatus may be stored when not in use. The halves k<SP>2</SP> are held in position by slotted stays s' pivoted at t'.
Patent GB-1293422-A (GB)
Title: Formation of polyphenylene ethers
Inventor: BENNETT JAMES GORDY
IPC: C08G65/44
Filed: 1970-03-13
Abstract: 1293422 Polyphenylene ethers GENERAL ELECTRIC CO 13 March 1970 [13 March 1969] 12262/70 Heading C3R Polyphenylene ethers are obtained by passing oxygen through a solvent containing a monohydric phenol substituted by hydrocarbon radicals in the 2 and 6 positions in the presence of a complex formed from an anhydrous non-basic cupric halide and a primary or secondary alkyl mono- or di-amine, there being 2À0 to 25À0 moles of amine per 100 moles of phenol and 0À2 to 2À5 moles of cupric halide per 100 moles of phenol. In examples polymers are obtained from 2,6-xylenol in toluene using catalysts formed from anhydrous cupric chloride, cupric bromide, di-n-butyl amine, N- methyl cyclohexyl amine, n-butyl amine and diethyl amine.