baber/WOPTO huggingface dataset:
Patent GB-1278888-A (GB)
Title: Ammonium polyphosphate with a high non-ortho p2o5 content
IPC: C05B13/06
Filed: 1970-09-15
Abstract: 1278888 Ammonium polyphosphate W R GRACE & CO 15 Sept 1970 [22 Sept 1969] 44059/70 Heading C1A Ammonium polyphosphate containing at least 50% non-ortho P 2 O 5  is prepared by (a) treating wet process phosphoric acid with activated carbon to remove organic impurities, (b) evaporating water from purified acid to raise its P 2 O 5  content to at least 54%, (c) heating the acid to from 290‹ to 340‹ F. and (d) reacting the acid with ammonia gas preheated to the same temperature range to provide ammonium polyphosphate. The ammonium polyphosphate may be subjected to flash evaporation to provide a melt.
Patent GB-1263762-A (GB)
Title: Improvements in or relating to mass spectrometers
Inventor: SMITH RONALD DAVID
IPC: H01J49/42
Filed: 1969-09-08
Abstract: 1,263,762. Mass spectrometers. R. D. SMITH, and G. W. BALL. 20 Aug., 1970 [8 Sept., 1969], No. 44222/69. Heading H1D. In a mass spectrometer comprising an ionizer, an ion filter, and an ion detector, the ion filter comprises a plurality of parallel rods 6 of an insulating material which has a coefficient of thermal expansion low relative to that of the metal rods used in known quadrupole spectrometers, the rods being coated with a conductive material and supported by members 8 and 11 which are also of an insulating material having a low coefficient of thermal expansion. Four rods 6 of ceramic alumina, quartz, or glass are coated with gold plating interrupted by grooves 19 to provide three portions 13, 14 or 15 to which connection is made by gold wires 16. The rods 6 are supported in part-circular recesses 10 in annular insulating members 8 and 11 of ceramic alumina or quartz supported in turn by a perforated cylinder 17 of the same material or of metal. The end portions 13 and 15 of each coating are connected to portion 14 either by capacitors (not shown) or by their self-capacitances, so that only the R.F. component of a combined D.C. and R.F. signal applied to portion 14 by a sweeping supply circuit (Fig. 4, not shown) is applied to the portions 13 and 15 to reduce end effects.
Patent GB-1083659-A (GB)
Title: Control system for means of fluidtightly closing butterfly valves
IPC: F16K31/163
Filed: 1965-10-21
Abstract: 1,083,659. Valves. M. C. E. HENRION. Oct. 21, 1965 [Dec. 4, 1964], No. 44628/65. Heading F2V.  An arrangement for subjecting to oil pressure and thereby inflating a deformable chamber fitted along the inner wall of the casing of a butterfly valve to ensure fluid-tight closure, includes a pump feeding oil into the chamber and having a cylinder 14 sliding axially inside a sheath 15 against the action of a spring 16, the pump piston 20 being connected to the valve closing mechanism 3 ... 9 whereby the cylinder 14 is shifted inside the sheath 15 as soon as the valve has closed and the oil pressure is raised to a value determined by the setting of the spring. The lever 4 acts as a torsion bar to accommodate the linear movement of pivot 6.
Patent GB-1018164-A (GB)
Title: Pneumatic slag off device for vessels with slag containing smelts
IPC: F27D3/15
Filed: 1963-11-13
Abstract: 1,018,164. Discharging slag from furnaces. HUETTENWERK SALZGITTER A.G. Nov. 13, 1963 [Nov. 19, 1962], No. 44739/63. Heading F4B. A pneumatic de-slagging device disposed near the discharge orifice 9 of a converter comprises a blowing rake 1 formed with cranked cross-pieces 3 having downwardly inclined nozzles 2, said cross-pieces being inclined substantially at right angles to the walls 5 of the orifice. The rake is adjustable vertically or longitudinally. In a modification, Figs. 3 and 4 (not shown), an additional short cross-piece is arranged at right angles to the supply pipe 4 nearer the discharge orifice. The nozzles may be supplied with air or gas or with a combustible gas and air.
Patent GB-449976-A (GB)
Abstract: 449,976. Knitting. ROTARY KNITWEAVE LOOMS, Ltd., T. & G. Building, Grey Street, Wellington, New Zealand. May 16, 1935, No. 14405. Addition to 424,150. [A Specification was laid open to inspection under Sect. 91 of the Acts, Dec. 16, 1935.] [Class 74 (ii)] The knitting-machine of the parent Specification is adapted to lay a horizontal weft thread retained in position by warp threads. The weft threads 107 are fed through nozzles 108 supported on an annular ring 103 rotated at the same speed as the knitting nozzles 53, 58. The teeth of the comb are formed on rings 111, 112, shaped to form a race 110 for the nozzles 108, and each tooth consists of inner and outer parts 117, 118, having between them an inwardly inclined space 115 down which the weft threads can easily slip. Separate sets of warp threads 65, 120 are fed through orifices 119, 123 in the inner and outer comb parts and when fed to both parts of each comb a double row of warp threads is laid, one on each side of the weft threads, whilst when fed alternately to adjacent comb members, the resulting fabric is as in Fig. 6. The number of weft threads corresponds to the number of knitting threads, and the nozzles 108 are placed just after the nozzles 53, 58.
Patent GB-1318601-A (GB)
Title: Data transmission system
IPC: H04L27/18
Filed: 1970-09-22
Abstract: 1318601 Digital transmission by main and echo pulses INTERNATIONAL BUSINESS MACHINES CORP 22 Sept 1970 [30 Sept 1969] 45016/70 Addition to 1154648 Heading H4P Two coders operating at a rate 1/T and arranged to generate main and echo pulses from binary digits as described in parent Specification 1,154,648, have respective subsequences A, B + #A, #B, A, #C + #AC, D. E + #D, #E, #DF + #D, F ... and B, C, E, F, applied to them which are derived from a binary sequence A, B-E applied to the transmitter at a rate 3/2T. The outputs of the coders, preferably weighted are combined to provide the transmitted signal. At the transmitter.-A sequence A-E applied to line Do at rate 3/2T is squared and gated by circuit To and applied to a gate T1 pulsed from clock H1 by pulses 1/T and gate T2 gated at intervals 1/2T phase displaced T/3 later. T1, T2 have inverse outputs. T1 output is delayed in T<SP>1</SP>1 and applied together with T2 output to a group of AND circuits feeding into OR circuit 01 the output from which is the subsequence given above, and is synchronous with T2: the AND circuits are gated by clock pulses. A coder COD1 receives the OR output and another coder COD2 receives the true output B, C, E etc. from T2. The coders are described in the parent Specification and develop main data pulses which occur in adjacent times #, #<SP>1</SP> with echo pulses intervening. Coder outputs are mixed in an analogue adder and # passed to line. The coder outputs P1, P2 may be weighted to improve the signal to noise ratio and a ratio of P1/P2 = 0À9/2À1 is stated to give optimum performance and that the resultant signal is approximately equivalent to an eight phase modulated signal. With P2 significantly greater than P1 binary values B, C may be detected by establishing the polarity of the signal at times #, #<SP>1</SP> and binary value A may be extracted by detecting a change in magnitude between #, #<SP>1</SP>. Signals may be modulated before passing to line and demodulated on reception. At the receiver, subtraction circuit SA1 is connected to line through full length rectifier R2 and delay D = #<SP>1</SP>-#, from which an undelayed output from a fullwave rectifier R 1 is subtracted and the resultant squared in SQ1 and applied to a gate TR 1 which is synchronised by a clock H2 to ignore echo pulses giving an output representative of data values A, D, G etc. A second squaring circuit feeds a gate TR3 which is triggered only at times #, #<SP>1</SP> the output being passed through a trigger TR2 which acts as a delay for time #<SP>1</SP>-# to synchronize with TR1. Outputs TR1, TR2 pass through AND gates triggered by pulses G to OR circuits 02, 03 to trigger circuit TR4 the output from which is the original data sequence at rate 1/T<SP>1</SP>. Synchronization of clock H2 with the received signals is necessary preferably by the method disclosed in Specification 1,188,688 indicated in dotted lines, the circuit producing a zero crossover at each time #<SP>1</SP> to which the clock H2 is synchronized.
Patent GB-1388987-A (GB)
Title: Bottle crate
IPC: B65D1/24
Filed: 1973-09-26
Abstract: 1388987 Bottle crates SPUMALIT-ANSTALT 26 Sept 1973 45156/73 Heading B8P A moulded bottle-crate can accommodate both loose bottles and bottles assembled in a carrier. The carrier which may be a cardboard sheet folded round the bottles as shown in Fig. 3 or a plastics carrier as shown in Fig. 5 has slots in its base so that it can be located in the crate with spacers 7 upstanding from the base of the crate engaged in the slots and separating individual bottles from one another. The plastics carrier can have ribs 11 strengthening and supporting the bottom and can be provided with a handle 12.
Patent GB-1121845-A (GB)
Title: Process and apparatus for recovering mercury or mercury(ii) chloride from catalysts containing mercury
IPC: C22B43/00
Filed: 1965-10-26
Abstract: Mercury is recovered as the metal from spent catalysts containing mercury chlorides by heating at 270-600 DEG C. (preferably 300-400 DEG C.) in a stream of a reducing gas such as hydrogen. Alternatively a non-reducing gas may be used at above 350 DEG C. when the mercury will be obtained mixed with mercury chlorided and hydrogen chloride. The process may advantageously be carried out at sub-atmospheric pressure, preferably 100 to 500mm of water. The gas may be led to a condenser to remove mercury and chlorides if present and then scrubbed with caustic soda to remove hydrogen chloride.ALSO:Mercury values are recovered from spent catalysts containing mercury chlorides, especially on active carbon, by heating the catalyst to 270 DEG  to 600 DEG  C. (preferably 300-400 DEG  C.) in a stream of gas.  If a reducing gas, such as hydrogen, is used, the product is metallic mercury.  If nitrogen, air, steam, carbon dioxide or hydrogen chloride is used, the product varies.  Below 350 DEG  C. mercury (I) chloride and hydrogen chloride are formed, whereas above 350 DEG  C. mercury (II) chloride and metallic mercury are also formed in significant amounts. If the gas containing the mercury compounds is brought into contact at the elevated temperature with an excess of chlorine, then the resulting products are almost exclusively hydrogen chloride and mercury (II) chloride which may be used to regenerate the catalyst.  The process may be carried out at sub-atmospheric pressure, preferably 100 to 500 mm. of water.  The <PICT:1121845/C1/1> effluent gas stream is led to a condenser to remove the less volatile components and thence to a scrubber to remove hydrogen chloride and other volatile materials.  In the apparatus shown in the Figure, catalyst is fed from a hopper 1 through a pipe 2 blown with nitrogen 3 as a nitrogen-lock to a pre-heating zone 4 and thence to the body of the heated desorption vessel 7.  Here it is blown with the gas admitted through pipes 8, 9. The mercury-free catalyst is removed via a metering unit 10.  The gas passes to a chlorination zone 12 where it is mixed with chlorine supplied through pipe 11.  It then passes to a condensing tower 14 where the bulk of the mercury (II) chloride condenses and to a caustic soda scrubber 16.  The system is maintained at a reduced pressure by a water jet pump 18. The desorption vessel 7 should be lined with glass, quartz, porcelain, enamelled steel or brickwork, glass or plastic being preferable for the remainder.
Patent GB-1429064-A (GB)
Title: Method and apparatus for the preparation of plastics articles by extrusion
IPC: B29C48/32
Filed: 1973-09-27
Abstract: 1429064 Tubular film extrusion DOW CHEMICAL CO 27 Sept 1973 [2 Oct 1972] 45362/73 Heading B5B A tubular plastic film is melt extruded from die 14 (Fig. 1) through annular orifice 17 and passed whilst still softened over gas bearing 20, inside the tube, and over a cylindrical mandrel 25 which is maintained at a temperature below the thermoplastic temperature of the tube. The gas bearing supplies gas at a temperature less than that of the thermoplastic temperature of the tube. This bearing may be immediately followed by a tube positioning means 33 which issues gas in an inwardly flowing radial direction so as to contact the tube with the mandrel. Polyethylene is specifically mentioned among a comprehensive list of suitable extrudable film forming resins.
Patent GB-1263257-A (GB)
Title: Styryl dyestuffs
Inventor: ANDERTON KENNETH
IPC: C09B23/14
Filed: 1968-09-25
Abstract: 1,263,257. Dyestuff intermediate. IMPERAL CHEMICAL INDUSTRIES Ltd. 15 Sept., 1969 [25 Sept., 1968], No. 45530/68. Heading C2C. [Also in Division C4] In Example 1, 4-[N-(#-(benzamido)ethyl)-N- ethyl-amino]-2-methylbenzaldehyde is prepared by reacting N-[#-(benzamido)ethyl]-N-ethyl-mtoluidine with hexamethylenetetramine in ethanol under reflux, adding a mixture of equal parts of formic and acetic acids and refluxing with further addition of the acid mixture, further boiling and then adding to HCl aqueous soultion, extracting with chloroform and distilling off the chloroform to leave the aldehyde product as an oil.
Patent GB-1081448-A (GB)
Title: Improvements in or relating to liquid pumps
IPC: F16J15/34
Filed: 1964-11-09
Abstract: 1,081,448. Mechanical seals. O. ECKERLE. Nov. 9, 1964 [March 2, 1964; April 16, 1964], No. 45611/64. Heading F2B. A mechanical seal for the drive shaft of a liquid pump comprises a housing slide ring 4, Fig. 1, a shaft slide ring 10 acted upon by a compression spring 13 and a drive member 17 having a portion 16 engaging a flat on the shaft slide ring, the drive member or another member 14 being interposed between the spring and the shaft slide ring and the drive member or the other member being slidable on the shaft. The rings may be made of ceramic material and formed with chamfered portions for receiving 0-rings 6, 12 which are urged into position respectively by a spring washer 7 and the compression spring 13. The drive member 17, which acts as a rear carrier-plate for the spring, is locked to a shaft-gripping member 21 by its projections 22 and is provided with projections 16 which extend through apertures in a spring carrier 14 and engage flat portions on the periphery of the shaft slide-ring 10. As illustrated in Fig. 2 (not shown), each projection (16) is hooked at (19) over a bent portion (20) of the spring carrier (14) so as to compress the spring (13) upon assembly. When the housing 2 is assembled on the pump 1, the spring (13) is further compressed, the hook then disengaging. In the embodiment shown in Fig. 5, the drive sleeve 33 is slidably secured on the drive shaft 30 by a bent portion 37 of the spring 36 which engages through a slot 38 in the sleeve into a recess 39 in the shaft, the slot allowing the assembly to be locked in a precompressed condition before further compression is applied upon assembly of the housing 24 on to the pump 46. Instead of the slot being shaped with an offset portion (42), Fig. 6 (not shown), a constricted portion (43), Fig. 7 (not shown), may be provided adjoining the slot. Leakage liquid is returned to the pump via a bore 49.
Patent GB-1137904-A (GB)
Title: Air purifiers
IPC: F24C15/20
Filed: 1965-10-28
Abstract: 1,137,904. Air conditioning. J. PROSVIC. 10 Oct., 1966 [28 Oct., 1965], No. 45616/65. Heading F4V. An air purifier for a kitchen comprises a hood 1 having an air inlet covered by a greasetrapping filter 7, an electrically driven fan 5, a recirculation outlet covered by a smell-removing activated charcoal filter 8 and a channel 10 leading to a discharge duct 4 to the outside, a damper 9 being provided to proportion air flow between the recirculation outlet and the discharge duct.
Patent GB-1205949-A (GB)
Title: Improvements in or relating to an hydraulic transmission
IPC: F16H61/46
Filed: 1967-10-06
Abstract: 1,205,949. Hydrostatic transmissions. INTERNATIONAL HARVESTER CO. 6 Oct., 1967 [11 Oct., 1966], No. 45673/67. Headings F2C and F2D. A hydrostatic transmission for a vehicle has by-pass valve means preventing excessive pressures during overrunning. The transmission comprises a pump and a motor of the variablestroke swash-plate type having by-pass valves 19, 19a between their pressure and return lines. The valves have spring-loaded spools 38, 38a subject to the pressure in a line 18a, 18 connected to a respective transmission line. Passages having restricted orifices 48, 47 and 48a, 47a are provided in the valves and lead to chambers 110, 110a above relief valves 108, 108a which are selectably unseated, according to the direction in which the transmission motor is driven, by a slidable cam 116 acting through push rods 125, 125a. The relief valve 108, 108a which is unseated is that which has the associated chamber 110, 110a open to the transmission line which is the low pressure line while the pump is driving the motor. If the motor overruns the pump the pressure in the normally low pressure line rises, and this pressure is exerted, by way of the unseated valve 108 or 108a and a passage 113, on the underside of the seated valve 108a or 108, and when the pressure reaches a predetermined value, unseats this valve 108a or 108, thus reducing the pressure acting on the rear of the spool 38a or 38 which is thereby shifted against its spring loading by the pressure on its front face to interconnect the lines 18, 18a. In order to open the operative by-pass valve 19 or 19a at will, during operation of the transmission, a valve 52 can be opened by depression of a pedal 76, thus the opening the chambers 110, 110a of the relief valves 108, 108a to exhaust via check valves 93, 93a and the valve 52. The by-pass valve having the high transmission pressure acting on its front face opens under the differential pressure so produced.
Patent GB-1022014-A (GB)
Title: Improvements in and relating to blast furnace hearths and blocks therefor
Inventor: BEAUMONT GORDON
IPC: F23M5/06
Filed: 1962-12-05
Abstract: 1,022,014. Furnace hearths. CARBLOX Ltd. Nov. 22, 1963 [Dec. 5, 1962], No. 45943/62. Heading F4B. Cruciform carbon blocks 10 for a blast furnace hearth have arms 11 opposite sides 20 of which diverge outwardly to give a dovetail formation, and arms 12 with upper and lower horizontal faces 21 and squared ends 23, the arrangement being such that on assembly horizontal joints transverse to the block lengths are broken. Vertically disposed rows are also offset to lock vertical joints. The arms 11 are formed with corners 13 and 14 at the upper and lower ends of the sides 20. Half blocks and corner blocks are also provided, Figs. 2, 3 and 4 (not shown), to complete the hearth. In a modification, Fig. 8 (not shown), the block is shaped like a Maltese cross.
Patent GB-1240285-A (GB)
Title: Purification of phosphoric acid
Inventor: BANIEL AVRAHAM MATITIAHU
IPC: C01B25/234
Filed: 1968-09-27
Abstract: 1,240,285. Phosphoric acid. ISRAEL MINING INDUSTRIES - INSTITUTE FOR RESEARCH & DEVELOPMENT. 27 Sept., 1968 [27 Nov., 1967], No. 46064/68. Addition to 1,112,033. Heading C1A. A process for recovering phosphoric acid from technical grade phosphoric acid comprises treating technical grade phosphoric acid with a mixture of at least two extracting solvents of the kind defined in Specification 1,112,033, the temperature of the treatment being low enough for the formation of a clear homogeneous extract phase distinct from a residual aqueous phase, separating the extract phase from the aqueous phase, raising the temperature of the extract phase to that at which it separates into a lower layer containing phosphoric acid and an upper layer containing the solvents and separating the lower layer from the upper layer. The solvents are for example esters, ketones, glycol ethers and ethers, such as ethyl, butyl and amyl acetate, ethyl butyrate and cyclohexanone. Stratification is enhanced by the addition of a small amount of water or purified phosphoric acid. The yield is increased by incorporation of sulphuric acid in amount e.g. from 0À1 to 5% in the technical grade acid. The residual acid, after separation of the solvent extract may be acidified with sulphuric acid in amount 30 to 100% by weight of the phosphoric acid and subjected to a repeated extraction with one or mixture of extracting solvents and a mixture of purified phosphoric and sulphuric acids is recovered. Impurities in the original acid can be removed by addition of alumina, calcium compounds, active carbon silicon dioxide or active clay prior to the solvent extraction. Calcium hydroxide or phosphates and phosphate rock can be added to the feed phosphoric acid to neutralize free sulphuric acid present. In examples the solvents used are (1) ethyl ether and nbutyl ether; (2) n-butyl ether and dibutyl ether of ethylene glycol; (3) isopropyl ether and ethyl ether; (4) isopropyl ether and cyclohexanone; (5) ethyl ether and diethylene glycol mono nhexyl ether; (6) mixed diethylene glycol mono- and di-n-butyl ethers; (7) diethylene glycol dibutyl ether and diisobutyl ketone. In example (8) a residual fraction from the extraction of technical grade phosphoric acid with a mixture of n-butyl ether and ethyl ether in a process similar to example, is acidified with concentrated sulphuric acid and the mixture is extracted with a mixture of isopropyl ether and ethyl ether.
Patent GB-1374604-A (GB)
Title: Conveying of components through automatic processing machines
IPC: H05K3/26
Filed: 1971-10-04
Abstract: 1374604 Reciprocating carriers J E LOCKE 4 Jan 1973 [4 Oct 1971] 46079/71 Heading B8A Apparatus for dipping printed circuit boards 30 successively in tanks 1-5 comprises a transverse beam 9 carried by a lifting column 21 and provided with spaced carrier arms 10-15 adapted to releasably support carriers 27 holding the circuit boards 30, a ram 22 for raising the lifting column 21 so as to lift the carriers 27 from and place them in the tanks 1-5, a ram 18 operative when the column 21 is raised is move the beam 9 a distance equal to the spacing between the tanks 1-5 and operative when the column is lowered to return the beam 9 through the same distance, and means conrolling the rams 18 and 12 such that a carrier 27 placed on the carrier arm 10 is first placed in the tank 1 and then successively transferred to the arms 11-15 for insertion in each of the tanks 2-5. The arms 10-15 have V-shaped projections 24 which engage like projections (25, Fig. 1) on the carriers 27 to enable these to be suspended from the arms. The tanks are closed by a common cover 6 having apertures 7 therein, the boards 30 passing through the apertures 7 whilst transverse members 28 on the carriers 27 engage the rims 8 of the apertures 7. When a carrier is lowered into a tank, continued lowering of the column 21 after the member 28 has engaged the rim 28 causes the carrier arm to disengage from the carrier. The tank 5 is followed by a drying or draining chamber 36 provided with a support ramp 45. Tanks 1-3 contain a stripping solution and have thermostatic heaters 37, 56, 58, tanks 2 and 3 having pipes 39, 41 which spray the solution on to the board, whilst tank 3 is provided with rotating brushes 42 at its mouth. Tanks 4 and 5 contain a washing liquid and have spray pipes 44, tank 4 housing brushes 42a.