baber/WOPTO huggingface dataset:
Patent GB-726900-A (GB)
Title: Improvements in the manufacture of cellulose ester filamentary materials
Inventor: FINLAYSON DONALD
IPC: D01D5/08
Filed: 1951-08-29
Abstract: In the melt-spinning of filamentary products from cellulose esters having a softening-point substantially above 150 DEG  C., e.g. the acetate, propionate, acetate-propionate or acetate-butyrate, the ester, before extrusion, is heated in an inert medium, e.g. air or nitrogen, to a temperature above 150 DEG  C. but below the softening temperature of the ester for a minimum period which is inversely proportional to the temperature, the relation between them being such that the minimum heating period is 5 minutes when the ester is heated to 220 DEG  C., 7 minutes when heated to 215 DEG  C., 15 minutes when heated to 200 DEG  C., and so on.  The inert medium may be at atmospheric, superatmospheric or subatmospheric pressure.  The ester is preferably washed with purified water prior to the heat treatment. Alternatively or in addition, the ester may be washed with purified water or purified water to which a small amount of an acid, e.g. hydrochloric or acetic acid, has been added, and then dried, subsequently to the heat treatment. The wash liquor in either case may be heated.  The ester is preferably in finely-divided form before it is fed to the melt-spinning devices of, for example, Specifications 719,853 and 721,674, but the ester to be heated may be in the finely-divided condition or in the form of flakes or fibres. In the case of cellulose acetate the triacetate or the acetone-soluble acetate may be treated and in the latter case acetone-solubility may have been effected as described in Specifications 531,014, 538,913, 568,051, 568,098, 620,726 and 657,827.  Specification 534,243 also is referred to.
Patent GB-1423007-A (GB)
Title: Suspension agent for plastics powders
IPC: D06M17/02
Filed: 1973-05-01
Abstract: 1423007 Suspension agent for plastics powders KUFNER TEXTILWERKE KG 1 May 1973 [15 June 1972] 20651/73 Addition to 1295558 Headings C3P and C3R A suspension agent for plastics powders comprises an aqueous solution of 0À05 to 3% by weight of a polymeric organic acid salt, said solution additionally containing an extremely fine dispersion of either or both of 4 to 15% of an unsubstituted fatty acid and 0À05 to 15% of a substituted fatty acid. The composition is prepared by heating the fatty acid with the salt solution to melt the fatty acid and then cooling and agitating the mixture. Plastics powders are incorporated into this composition to form pastes which are printed in a series of spots on to interlining for subsequent heat sealing to other materials. In examples the polymeric organic acid salt used is the morpholin or ammonium salt of polyacrylic acid, and the fatty acid is 12- oxystearic acid or stearic acid. Low pressure polyethylene or a polyamide formed from caprolactam, the hexamethylene diamine salt of adipic acid and lauric lactam with either benzene-sulphonic acid-N-butylamide or p-toluenesulphonic acid ethylamide as softener is mixed into the suspending agent to form a printing paste.
Patent GB-1244180-A (GB)
Title: A moisture-protective multi-layer pad
Inventor: WYNDHAM GISELA ANTONIA MARIA
IPC: A45D44/08
Filed: 1968-05-01
Abstract: 1,244,180. Garment protectors. G. A. M. WYNDHAM and G. G. M. VON VERESS ZU DALNOK. 25 July, 1969 [1 May, 1968], No. 20699/68. Heading A3U. [Also in Divisions A4, B4 and B5] A moisture protective pad, e.g. an apron, cuff, bib, collar or hairdresser's cape comprises two or more pairs of sheets 21, each pair consisting of a sheet 22 of moistureabsorbent material, e.g. of paper, backed by a sheet 23 of moisture-proof material, e.g. of polyethylene or of waxed paper, the pairs of sheets being joined together only at their peripheral edges so that the sheets may be torn from the pad in pairs. The two sheets of any one pair can be jolined at their peripheries or over the whole of their contacting surfaces.
Patent GB-571780-A (GB)
Title: Process for the production of benzene-sulphonyl-guanidines
IPC: C07C311/64
Filed: 1943-12-13
Abstract: p - Substituted benzenesulphonylguanidines are produced by heating to the reaction-temperature, either directly or in an inert solvent boiling within the range 125-200 DEG  C., e.g. an alkyl ether of ethyleneglycol, a guanidine salt, e.g. the carbonate, nitrate, chloride or sulphate, with a compound of the general formula <FORM:0571780/IV/1> wherein R represents an amino group, a group hydrolysable to an amino group, e.g. an acylamino group, or a group reducible to an amino group, e.g. a nitro group.  Specified N4-acyl substituents are acetyl, propionyl butyryl, benzoyl, and nicotinyl. In examples: (1) a mixture of N4-acetylsulphanilamide and guanidine carbonate is heated at 180-190 DEG  C. for 30 minutes, made strongly alkaline with ammonium hydroxide and the residue of crude N4-acetylsulphanilyl guanidine recrystallised from water; (2) the product in (1) is refluxed for 5 minutes with dilute hydrochloric acid and the solution treated with activated carbon, filtered and neutralised with sodium hydroxide solution to precipitate crude sulphanilyl guanidine; (3) a mixture of p-aminobenzenesulphonamide and guanidine carbonate is heated to 140 DEG  C. in 25 minutes, then at 140-145 DEG  C. for 30 minutes and treated as in (1) to obtain sulphanilylguanidine; (4) N4-acetylsulphanilamide and guanidine carbonate are heated under reflux for 1 1/2 hours in diethylene glycol monomethyl ether, the solution then being diluted with water and made alkaline to precipitate crude N4-acetylsulphanilylguanidine carbonate are heated under reflux for 1 1/2 hours with ethylene glycol n-butyl ether and the insoluble matter is suspended in water, made alkaline with ammonium hydroxide and filtered to obtain crude N4-acetylsulphanilylguanidine.
Patent GB-715244-A (GB)
Title: Improvements in compounding butyl rubber
IPC: C08K9/06
Filed: 1952-08-20
Abstract: A filler for butyl rubber consists of precipitated hydrated silica, or precipitated hydrated calcium silicate or kaolin, having a particle size not greater than 10 microns and having been reacted with an unsaturated organohalosilane selected from cycloalkarylhalosilanes and cycloalkenylalkylhalosilanes. Specified organohalosilanes are cyclohexanyltrichlorosilane, beta-(3-cyclohexanyl)-ethyltrichlorosilane, 6-methyl-3-cyclohexenyltrichlorosilane and 3-methyl-3-cyclohexenyltrichlorosilane.  The filler may be reacted with the organohalosilane by slurrying the filler in a low-boiling hydrocarbon, e.g. petroleum ether, adding the silane and refluxing, or by passing air saturated with the silane through a tube containing the filler or the filler and silane may be added separately to butyl rubber during compounding, together with the normal vulcanising agents and vulcanised.  U.S.A. Specification 2,535,036 is referred to.ALSO:A filler for butyl rubber consists of precipitated hydrated silica, or precipitated hydrated calcium silicate or kaolin, having a particle size not greater than 10 microns and having been reacted with an unsaturated organohalosililane selected from cycloalkenylhalosilanes and cycloalkenylalhylhalosilanes. Specified organohalosilanes are cyclohexenyltrichlorosilane, 6-methyl-3-cyclohexenyl-trichlorosilane, and 3-methyl-3-cyclohexenyl trichlorosilane.  The filler may be reacted with the organohalosilane by slurrying the filler in a long boiling hydrocarbon, e.g. petroleum ether adding the silane and refluxing or by passing air saturated with the silane through a tube containing the filler, or the filler and silane may be added to butyl rubber during compounding and reacted in situ. U.S.A. Specification 2,535,036 is referred to.
Patent GB-208882-A (GB)
Abstract: 208,882. Heath, F. G. Nov. 24, 1922. Hand knitting-appliances.-In a knitting needle of the type comprising two end portions 1 and a flexible connecting member 2, the parts 1 are made tubular and are provided at their ends with detachable solid points 5 and' with internally screwed members 6 for receiving a helical coil of wire, which with an inner length of plain or stranded wire 9 soldered thereto comprises the connecting member 2. The end portions 8 can be unscrewed and others of different dimensions substituted. The parts are preferably of non- ferrous metal, such as brass.
Patent GB-824667-A (GB)
Title: Improvements relating to the magnetization of magnetic materials
IPC: G11C11/06
Filed: 1956-07-05
Abstract: 824,667. Circuits employing bistable magnetic elements. GENERAL ELECTRIC CO. July 5, 1956 [July 5, 1955], No. 20901/56. Class 40 (9). [Also in Group XXXV] The magnetization of magnetically soft cores having a substantially square hysteresis loop for memory arrays in digital computors, is reversed by a field Hp of high intensity but short duration immediately followed by a prolonged but weaker excitation Ha. The initial field has an amplitude greater than the coercive force of the material and is applied for long enough to reverse the polarization of one-tenth of the material of the magnetic core, the rest being repolarized by the weaker field of longer duration. A circuit comprising a double triode for mixing two separate impulses and an amplifier triode for feeding the resultant composite impulse to the magnetizing coil of the core is described. The high-speed magnetic storage metres may be operated by composite pulses.
Patent GB-1344957-A (GB)
Title: 3-aryl-2-halothiopropionic acid derivatives their preparation and their use as herbicides as herbicides
IPC: A01N37/10
Filed: 1972-05-05
Abstract: 1344957 3 - Aryl - 2 - halopropionic acid derivatives BAYER AG 5 May 1972 [6 May 1971 2 Dec 1971] 21034/72 Heading C2C The invention comprises compounds of the general formula in which X is chlorine or bromine, R<SP>1</SP> is hydrogen, a salt-forming cation or an alkyl, alkenyl, alkynyl or cycloalkyl radical, which radical may optionally carry one or more substituents selected from halogen, haloalkyl, hydroxy, alkoxy, alkoxycarbonyl and aryl, R<SP>2</SP> is hydrogen, halogen or alkyl, R<SP>3</SP> is hydrogen or alkyl, n is 0, 1, 2 or 3 and R<SP>4</SP> is halogen, haloalkyl or nitro, the radicals R<SP>4</SP> being identical or different when n is 2 or 3. Such compounds are prepared by reacting a compound of the general formula with a compound of the general formula HS-R<SP>1</SP> where the R's, X's and n have the meanings given above. Examples are furnished. The products may be used as selective herbicides alone or in formulations with the conventional ingredients. 3 - (2,6 - Dichlorophenyl) - 2- chloropropionyl chloride is prepared by reacting the corresponding acid with thionyl chloride. 2 - Chloro - 3 - (4<SP>1 </SP>- chlorophenyl) - propionyl chloride is prepared by reacting 1,1-dichloro-3- (4<SP>1</SP> - chlorophenyl) - propene with formic acid containing some water and chlorine.
Patent GB-298725-A (GB)
Title: Improved electrical driving mechanism for gramophones and the like
IPC: G11B17/00
Filed: 1927-08-10
Abstract: 298,725. Rebikoff, W. Aug. 10, 1927. Driving.-A gramophone or the like is driven by an electromotor acting through a spring, the spring being energized periodically by the motor under the control of a switch, which closes whenever the spring has run down to a predetermined small extent and opens when the lost energy has been restored. The switch is adapted to speed up the motor when necessary, by shortcircuiting a resistance in the motor circuit. In the construction shown in Figs. 1 and 2, an electromotor 1 is geared through a worm and wheel 2 to a sleeve 2a to which the inner end of a spring 3a is secured, the outer end of the spring being attached to a drum 3 mounted on a spindle 5 passing through the sleeve. A wheel 6 on the drum drives the turntable spindle 8, which is controlled by a governor. On the sleeve 2a is fixed a plate 4 carrying a contact-blade 14, and having pivoted thereon a forked contactmember 11, from the ends of which project insulated pegs between which the periphery of the drum passes. These pegs are adapted to be engaged respectively by cams 16, 17 on the drum, by means of which the fork 11 is moved so that contact is either made or broken between the outer branch of the fork and the blade 14. Two slip rings 10 are mounted on the sleeve 2a and are engaged by brushes 9 in the circuit of the motor, a resistance 9<a> being connected across the brushes. One slip ring 10 is connected to a spring 13, which engages one or other of a pair of notches in the fork 11, the other slip ring being connected to the blade 14. When the cam 17 moves the fork 11 into contact with the blade 14, the resistance 9<a> is short-circuited, and the motor 1 runs at such a speed that the arm 4 carried by the sleeve 2a rotates more rapidly than the drum 3 driven by the spring. The latter is therefore wound up until the fork 11 overtakes the cam 16 and is moved thereby so that contact with the blade 14 is broken. This brings the resistance 9a into the motor circuit, and the motor is slowed up, the spring unwinding for a period until the cam 17 again engages the fork 11 and the action described above is repeated. The distance by which the cams 16, 17 are spaced apart on the drum is preferably adjustable.
Patent GB-1471600-A (GB)
Title: Amplifier and bias circuitry therefor
IPC: H03F1/30
Filed: 1974-05-14
Abstract: 1471600 Transistor amplifiers RCA CORPORATION 14 May 1974 [24 May 1973] 21237/74 Heading H3T An amplifier comprises a pair of like polarity transistors, having the same current gain connected to feed a load in push-pull and a phase splitter which together with current inverters provide quiescent bias and signal currents, the quiescent bias currents being controlled by a resistor having a value dependent upon the # value of the transistors so that the quiescent current is independent of #. In Fig. 1 the compound output transistors 130, 140 are driven by current-mirror amplifiers 125, 120, which derive their inputs from a phase-splitter 110 also of current-mirror configuration and which is driven by input amplifier 105. Overall negative feedback is provided by line 153. Zener diode 167 renders the voltage between line 168 and earth constant: the voltage drop across Darlington pair 171, 172 is also substantially constant, and so the voltage across nominally equal resistors 173, 174 is substantially constant. Resistor 173 is formed by simple diffusion, together with the base regions of the transistors, while resistor 174 comprises a "pinch" resistor formed by a first similar diffusion followed by a second diffusion along with the emitter regions of the NPN transistors. Consequently resistor 174 varies proportionately to the #'s of these transistors. It is demonstrated in the Specification that the quiescent collector currents of transistors 112, 113 in phase-splitter 110 (in which transistor 113 is biased from Darlington pair 171, 172) is inversely proportional to #. Due to the current mirror stages 120, 125 the quiescent base currents in output stage 130, 140 are also inversely proportional to # so that the quiescent collector currents are independent of it. The Specification refers to alternative ways of biasing the base of transistor 113, using bias networks disclosed in U.S. Specifications 3,573,645. In Fig. 2 (not shown) composite output transistors (230, 240) include the current amplifiers 125 and 120, the diodes of these amplifiers being omitted and # compensation therefore being provided by 174. Attenuation of the current through resistors 173 and 174 is effected by including the base emitter path of a further transistor (275).
Patent GB-1033014-A (GB)
Title: Improvements in or relating to snap-action electric switches
Inventor: BEER DONALD COURTNEY
IPC: H01H13/18
Filed: 1962-05-28
Abstract: 1,033,014. Retractive switches. OTEHALL Ltd. May 28, 1963 [May 28, 1962], No. 21287. Divided out of 1,033,013. Heading H2B. Relates to a switch as described in Specification 1,033,013 but the claims are directed to the joints between any two mutually hinged members wherein an edge or aligned edges of each member of the pair rests and pivots on a surface portion or portions of the other member of the pair.
Patent GB-1065751-A (GB)
Title: Improvements in or relating to fire alarms
Inventor: NEWALL JOHN
IPC: G10K1/26
Filed: 1965-05-20
Abstract: 1,065,751. Couplings. MATHER & PLATT Ltd. March 2, 1966 [May 20, 1965], No. 21353/65. Heading F2U. A fire alarm motor and a gong are mounted on opposite sides of a wall and have square section shafts joined by square . section tube which floats axially to permit mounting of the motor and gong on walls of different thicknesses. Alternatively, an angular section rod may engage corresponding sockets in the motor and gong shafts. '
Patent GB-927252-A (GB)
Title: Improvements relating to stereophonic reproducers
Inventor: TAYLOR ERIC WILFRED
IPC: H04S1/00
Filed: 1958-07-04
Abstract: 927,252. Stereophonic transmissions. ELECTRIC & MUSICAL INDUSTRIES Ltd. June 12, 1959 [July 4, 1958], No. 21415/58. Class 40 (4). [Also in Group XXXVI] A stereo receiver (Fig. 6) receives an audio signal V A  representing sound and a control signal (V<SP>11</SP> L  - V<SP>11</SP> R ) / (V<SP>11</SP> L  + V R <SP>11</SP> representing the position of the   source of the sound where V L <SP>11</SP>V R <SP>11</SP> are signals derived from the outputs of two directional microphones. V A  is passed to a tone control circuit 25 and amplifier 27 to one input of a multiplier 29 of the Hall plate type while the control signal is supplied from filter 24 to an F.M. detector 26 through an amplifier to the other input of 29. The product is applied with opposite polarities to 6, 7, V A  being additionally supplied to the outputs by multiplier 29 so that two output signals are produced. These outputs are equal (=V A ) when the control signal is zero representing a source of sound placed centrally and one decreases as the other increases, depending on whether the control signal decreases or increases, representing a source displaced from the centre. Specification 871,992 is referred to.
Patent GB-715438-A (GB)
Title: Improvements in or relating to radio telegraph diversity receiving systems
Inventor: HOLLAND JOHN DOUGLAS
IPC: H04L1/02
Filed: 1952-08-26
Abstract: 715,438. Radio receiving systems. STANDARD TELEPHONES & CABLES, Ltd. Aug. 26, 1952, No. 21422/52. Class 40 (5) In a space or frequency diversity receiving system for frequency-shift or amplitude modulated radio te'egraph signals D.C. signals different for " mark " and " space " are applied from amplitude demodulators 13 or frequency discriminators 7, corresponding to different signal paths or frequency channels equally to D.C. amplifier valves VI, V2 having common anode impedance R1 and a pair of gating valves V3, V4 having a common cathode impedance R2 are connected each in series with one of the valves V1, V2, and have a pair of control potentials representing the signal strengths in the paths or channels respectively applied to them so that one only of the gating valves V3, V4 is conducting at any time, due to the cathode coupling. Since the R.F. inputs to .the demodu'ators 13 and discriminators 7 are first passed through limiters 5, 6 and the valves V1 ... V4 form a bridge circuit the output signals from the impedance Rl are made constant in level before being applied, e.g. to a wave shaping flip-flop circuit and telegraph relay. Double pole switches 9, 10 permit changeover from A.M. to frequency shift operation. The signal strength voltages are derived, prior to the limiters, by tuned transformers T1, T2 and differentially connected diode detectors V5, V6 connected with the control grids of the gate valves V3, V4.
Patent GB-1419849-A (GB)
Title: Well completion equipment
IPC: E21B34/16
Filed: 1973-05-04
Abstract: 1419849 Wells &c McEVOY OILFIELD EQUIPMENT CO 4 May 1973 21468/73 Heading E1F In a well completion comprising production tubing 49 having a downhole safety valve (not shown), a hanger 43 supporting the tubing, a tubing head 11 supporting the hanger, and a pipe 57 supplying control fluid to the valve, a duct 150 from the supply of control fluid outside the head is connected to ducts 61, 56 in the hanger leading to the pipe 57. As shown in Fig. 3 the duct 150 is formed in a stringer 65 which is threaded into the head to engage packing 130, 131 with the hanger, the stringer being sealed in the head by packing 163, 165, 167. In the modification shown in Fig. 5 a flexible supply conduit 302 is screwed into the hanger, and is sealed in the head by a seal 300. The completions shown are dual completions having split hangers, and the hanger couplings 45 include back pressure valves. In a single completion (Fig. 4, not shown) the hanger ducts terminate in an annular groove located between upper and lower seals on the side of the hanger, the groove communicating with a radial passage in the head.
Patent GB-644057-A (GB)
Title: Improvements in or relating to the welding of non-metallic thermoplastic materials and to the fabrication of products therefrom
IPC: A43B13/38
Filed: 1947-08-07
Abstract: 644,057. Seaming and finishing edges of sheet material. UDYLITE CORPORATION. Aug. 7, 1947, No. 21530. Convention date, Feb. 28, 1944. [Class 42 (i)] [Also in Group VII] Sheets of thermoplastic material are welded together along their edges (not along the marginal portions of the faces of the material) by pressing the sheets together along the margins adjacent to their edges to a thickness less than the total thickness of the impressed sheets, then applying heat to the compressed edges to melt them at a temperature below the thermal decomposition point of the material, and then smoothing off the melted edges to form a homogeneous joint along the edges of the sheets. As shown, an inner sole is made from a plurality of foraminated thermoplastic sheets 3 (e.g. screening woven from thermoplastic thread), as described in Specification 638,312, except that the templets 1, 2 are concave so that the resulting weld 11 is of a thickness less than that of the remainder of the sole. Specification 635,252, [Group XI], also is referred to.
Patent GB-701775-A (GB)
Title: Improvements in or relating to electric discharge devices
Inventor: LAWRENCE JOHN ARUNDEL SMYTH
IPC: H01J19/42
Filed: 1952-08-27
Abstract: 701,775. Discharge apparatus. STANDARD TELEPHONES & CABLES, Ltd. Aug. 27, 1952, No. 21544/52. Class 39(1) [Also in Group XXXVI] A method of locking a wire in an insulator comprises the steps of passing the wire 1 through a hole in an insulator 2 and bringing pressure to bear on the surface of the wire by means of blades so shaped as to cause indentations at points on the surface of the wire and bulges at adjacent points, the position and shape of the bulges being so arranged that a firm contact between the bulges and the insulator is produced. The tool may comprise four chisel shaped blades 3, 4, 5 and 6 as shown in Fig. 1. Fig. 2 shows the wire clamped to the insulator by the bulges produced by the tool.
Patent GB-359581-A (GB)
Title: An improved anti-dazzle shield or shade for motor headlights and the like
IPC: F21V11/00
Filed: 1931-04-15
Abstract: 359,581. Vehicle &c. lamps. RUSSELL, J. W., 4, Sutherland Avenue, Paddington, London. April 15, 1931, No. 21555/30. [Class 75 (iv).] Lantern shutters.-An antidazzle device for vehicle or like lamps comprises a truncated conical member 1 containing a number of outwardly flared opaque hinged shutters 2 which are normally disposed at about 20‹ to the horizontal. The shutters 2 are hinged at 4 and pivotally interconnected to vertical bars 3, being controlled from the driver's seat by electromagnetic, Bowden wire, or exhaust operating means against the action of return springs. The back of the member 1 may be fitted with a fixed screen 5 and the shutters and internal surface of the member 1 may be of a flat black colour. The upper and lower halves of the series of shutters may be separately interconnected and operated.