baber/WOPTO huggingface dataset:
Patent GB-1091978-A (GB)
Title: Fully conjugated aromatic polymers
IPC: C08G73/06
Filed: 1965-09-03
Abstract: The invention comprises polymers containing recurring units of formula <FORM:1091978/C3/1> where Ar is an aromatic radical containing from 6 to 18 carbon atoms, R1 is hydrogen, alkyl, alkaryl, acyl or aryl, X and X1 are different and are <FORM:1091978/C3/2> and the nitrogen atoms and carbonyl groups bonded to each side of Ar are attached to adjacent substitutable carbon atoms of Ar. The polymers are obtained by subjecting to ring closure a compound of formula <FORM:1091978/C3/3> where Ar and R1 are as above, R2 is hydrogen or carboxyl and Y is hydrogen or a carboxylic acid salt forming element e.g. sodium, potassium, lithium, calcium or magnesium, to obtain a compound of formula <FORM:1091978/C3/4> which is then oxidized to obtain the polymer.  In examples polymers are obtained from N,N1-diacetyl - N,N - (2,5 -dicarboxy - p - phenylene) diglycine, from dipotassium-p-phenylene-diglycinate, from dipotassium-m-phenylene-diglycinate, from dipotassium-1,5-naphthalyne-diglycinate, and from dipotassium-4,41-biphenylene-diglycinate, by ring closure (by heating with anhydrous sodium acetate and acetic anhydride, and by heating with sodium hydroxide, potassium hydroxide and sodium amide) followed by oxidation (with air or oxygen); also a polymer is obtained by oxidizing N,N-dibenzyl-3,7-di-acetoxy -1,5 - dihydrobenzo [1,2 - b; 4.5 - b1] dipyrrole.ALSO:The following intermediates are prepared in examples: 2,5-dichloroterephthalic acid is reacted with glycine to obtain N,N1-(2,5-dicarboxy-p-phenylene) diglycine, which is converted to N,N1-diacetyl-N,N1-(2,5-dicarboxy-p-phenylene) diglycine with acetic anhydride, and then heated with sodium acetate and acetic anhydride to obtain N, N1-diacetyl-3,7-diacetoxy-1,5 - dihydrobenzo - [1,2 - b1,4,5 - b1] dipyrrole; N,N1-2,5-dicarboxy-p-phenylene) diglycine is reacted with benzyl chloride and then heated with sodium acetate and acetic anhydride to obtain N,N1-dibenzyl-3, 7-diacetoxy-1,5-dihydrobenzo - [1,2 - b; 4,5 - b1] - dipyrrole; the last reaction is also effected with N,N1-(2,5-dicarboxy-p-phenylene) diglycine, presumably giving 3,7 - diacetoxy - 1,5 - dihydrobenzo - [1,2-b1,4,5-b1] dipyrrole; chloroacetic acid is neutralized with sodium hydroxide and reacted with p-phenylene diamine, m-phenylene diamine, 1,5-naphthylene diamine and benzidene and the products reacted with potassium hydroxide to obtain dipotassium p-phenylene-diglycinate, dipotassium-m-phenylene-diglycinate, dipotassium - 1,5 - naphthylene - diglycinate and dipotassium - 4,41 - diphenyl - diglycinate, and these compounds are ring-closed by heating with sodium hydroxide, potassium hydroxide and sodium amide.
Patent GB-1526434-A (GB)
Title: Liquid crystal imaging system
IPC: G09F9/30
Filed: 1975-09-15
Abstract: 1526434 Controlling light XEROX CORP 15 Sept 1975 [16 Sept 1974] 37751/75 Heading G2F [Also in Division C4]  An optically negative liquid crystal composition comprising optically negative liquid crystal material and at least one electro-phoretic-like or dipolar additive (respectively moving or realigning in an electric field) is converted from the focal conic (FC) texture to the Grandjean (GJ) texture by applying a D.C. or A.C. electric field of the appropriate amplitude, the A.C. field having a frequency which will not suppress ion flow, e.g. below 1KHz. The liquid crystal material preferably has a negative dielectric anisotropy at least in use (i.e. including the induced dipole moment) and the additive may form 0.25-95% of the composition. The composition may initially be in the GJ state, converted to the FC state by a relatively low D.C. field and subsequently to the GJ state by a higher D.C. field. Reduction of the latter field may again give the FC state. Alternatively, with non-injecting electrodes, a first D.C. pulse, sufficient to remove charge carriers from the composition, may produce GJ to FC conversion, and a second D.C. pulse may then produce FC to GJ conversion. The two pulses may have the same or different amplitudes and durations. For a transient display, the pulses may be combined i.e. a single D.C. pulse of greater duration than the two pulses combined. For repeated use, the polarity of the pulse should be reversed. In addition to the appearance and other optical properties of the GJ and FC states being different and hence capable of providing a display, the helical pitch of the molecular structure of the GJ state in the initial and final states will differ due to the presence of the electric field, providing differences for example in colour (selective reflection) and optical activity. The applied electric fields may be shaped e.g. via shaped or segmented electrodes, electron beam address, or via a photo-conductor.
Patent GB-1324013-A (GB)
Title: Multivibrators
IPC: H03K3/282
Filed: 1970-08-05
Abstract: 1324013 Astable multivibrator ROBERT BOSCH GmbH 5 Aug 1970 [6 Aug 1969] 37758/70 Heading H3T An astable multivibrator has a variable mark-space ratio, with the space period being automatically changed by a variation in mark period, to enable the frequency to be maintained constant by the discharging of a capacitor 22 with a constant current from T12 during both periods. Transistors 10, 11 are cross-coupled by capacitors 13, 22. When T11 turns on, C13 turns off T10 whose collector goes positive to reverse bias a diode 19. Capacitor C22 now has its right hand plate connected to the negative supply through D24, R25 and its left hand plate charged through R39 towards the positive supply voltage (43, Fig. 2, not shown). A further capacitor 38, initially discharged, is now also charging, resistor 35 and T11 serving to connect it to the negative line. When C38 voltage (P36, Fig. 2, not shown) is sufficiently negative to forward bias D37 then point 20 is taken negative with point 36, overriding the effect of R39 charging C22. This relatively fast negative-going voltage (P36) is transmitted through C22 to point 23 to reverse bias D24 (negative going curved portion of P23 curve, Fig. 2). Point 36 and therefore the left plate of C22 stabilize at an intermediate voltage determined by the ratio of R39 and R35. The right plate of C22 charges linearly through the constant current transistor T12 (P23) until the multivibrator changes state due to the charging of C13, allowing T10 to turn on again. The negative excursion of T10 collector causes D19 to conduct when the said intermediate voltage at 20 is reached, the remainder of the excursion being transmitted by C22 to take the potential at 23 abruptly from the value P 0  it had reached to P 1  (Fig. 2, not shown). This therefore increases the time taken for T12 to charge C22, which it continues to do, up to a voltage sufficient to turn on T11 and restart the cycle. This extra time is related to P 0  since the charging is linear, and as P 0  is greater (i.e. more negative) for shorter "T11 on" periods, the following "T10 on" period will be correspondingly longer. The relationship is arranged to keep the frequency constant. In a modification (Fig. 3, not shown) the capacitor 38 is replaced by a Miller integrator (47) which enables a smaller capacitor (49) to be used, and thus integrated circuit construction is facilitated.
Patent GB-1107946-A (GB)
Title: Method of manufacturing cloth-covered belt-buckles
IPC: A44B11/00
Filed: 1966-08-23
Abstract: 1,107,946. Manufacturing buckles. H. MITSUI. 23 Aug., 1966 [27 Oct., 1965; 28 Feb., 1966], No. 37815/66. Heading E2A. A method of manufacturing cloth covered buckles each consisting of interfitting front and back frames with convex surfaces and a centrally apertured covering cloth comprises stretching the cloth to engage an upstanding bent rim on the inner periphery of the front frame in the aperture, collapsing the rim to grip the edge of the aperture, drawing the cloth to the front of the frame through the hole therein to cover the frame, tucking the edge of the cloth into the back of the front frame and inserting the back frame into the front frame by pressing the front frame and back frame together. The front frame with the cloth 4 attached to the rim is placed in a groove 51 in a lower die A and the rim is collapsed to grip the edge of the cloth by an inclined edge part 61 of an upper die B. After the cloth has been drawn over the front of the front frame it is placed inverted in a groove of a second lower die with an upstanding surround into which fits another member with an inclined edge which turns the edge of the cloth inwardly. The back frame is placed over the front frame and a second upper die is lowered to insert the back frame into the front frame. The second upper die and the other member are removed and a finishing die is pressed onto the back of the buckle to grip securely the cloth between the frame parts. A tongue is pivotally attached to the cross bar of the buckle.
Patent GB-1125920-A (GB)
Title: Turbomachine rotors
IPC: F01D5/08
Filed: 1967-08-17
Abstract: 1,125,920. Turbines. GENERAL MOTORS CORP. Aug. 17, 1967 [Dec. 12, 1966], No. 37965/67. Heading F1T. An axial flow rotor for a gas turbine or like machine comprises blade carrying discs 5, 6 coupled together at 11 by the inter-engagement of teeth on flanges 7, 9 radially outward flanges 29, 30 mutually confronting in substantial alignment with the plane of coupling at 11, and a sealing ring 31 mounted to cover notches 35 in the confronting faces of the flanges 29, 30. The notches 35 are separated by projections 37 and are formed when a face cutter machines the teeth of the coupling 11, the cutter traversing arcs (34), Fig.2 (not shown). The flanges 29, 30 abut, as shown, or may be slightly spaced apart axially, in either case the sheet metal sealing ring 31 preventing leakage of cooling air from space 26 through notches 35. The cooling air is supplied through passages 23, 25 and flows through passages 21, 22 to the interiors of the blades 17. Labyrinth seal ridges 45 are provided on the flanges 29, 30.
Patent GB-927171-A (GB)
Title: Improvements in and relating to the manufacture of titanium dioxide
Inventor: WALMSLEY ANTHONY
IPC: C01G23/07
Filed: 1958-11-25
Abstract: In the production of titanium dioxide by the oxidation of a titanium tetrahalide in a fluidized bed of titanium dioxide-containing solids at 800 DEG -1500 DEG C. in the presence of excess oxygen and carbon monoxide to react with said excess, a diluent gas consisting of nitrogen, chlorine or carbon dioxide is incorporated with the carbon monoxide in an amount between 11 and 65% by volume based on the carbon monoxide/diluent mixture.  The oxidizing gas is preferably oxygen, but may be an oxide of nitrogen.  The size distribution of the particles constituted in the bed may be controlled by withdrawing some of the titanium dioxide coated particles and adding fresh alumina, silica zirconia, zircon or titanium dioxide particles or smaller mean particle size, as described in Specification 866,363.  A diluent gas may additionally be incorporated with the titanium dioxide or the oxidizing gas.
Patent GB-875048-A (GB)
Title: Herbicidal compositions
Inventor: FISCHER ADOLF
IPC: A01N47/30
Filed: 1959-11-10
Abstract: Ureas of the formula <FORM:0875048/IV (b)/1> in which Y represents phenyl, monoethylphenyl, dimethylphenyl, trimethylphenyl, monoethylphenyl, diethylphenyl, triethylphenyl, monoisopropylphenyl, diisopropylphenyl or triisopropylphenyl, R1 represents hydrogen, methyl, hydroethyl or beta-hydroxypropyl and R2 represents methyl or methoxy are produced by reacting the corresponding substituted anilines with carbamic acid chlorides or esters of substituted carbamic acids. In an example N - beta-hydroxy-propyl-N-meta-methylphenylN1-dimethyl urea is prepared by reacting N-beta-hydroxypropyl-meta-methylaniline with dimethylcarbamic acid chloride or dimethylcarbamic acid ethyl ester. N-beta-hydroxypropyl-meta-methylaniline can be obtained by reaction of meta-methylaniline with propylene oxide. The corresponding urea derivatives having an alkoxy group on the second nitrogen atom, for example N-methyl-N-phenyl, N1-methyl-N1-methoxy urea may be obtained in the manner described above or from N-methylaniline and N - methoxy - N - methyl - carbamic acid chloride or N-methoxy-N-methylcarbamic acid methyl ester.  The N-methoxy-N-methylcarbamic acid chloride or ester is obtained by methylating hydroxylamine or a derivative of hydroxylamine, reacting with phosgene and possibly reacting the substituted carbamic acid chloride thus obtained with an alcohol.ALSO:A herbicidal composition comprises a phenyl urea derivative of the general formula <FORM:0875048/VI/1> in which Y represents phenyl, monomethylphenyl, dimethylphenyl, trimethylphenyl, monoethylphenyl, diethylphenyl, triethylphenyl, monoisopropylphenyl, diisopropylphenyl or triisopropylphenyl, R1 represents hydrogen, methyl, hydroethyl or beta-hydroxypropyl and R2 represents methyl or methoxy, plus a phenylcarbamic acid ester of the general formula <FORM:0875048/VI/2> in which R represents hydrogen, chloro or methyl, and Z represents methyl, ethyl, propyl, isopropyl, butyl, isobutyl, propenylpropinyl, allyl, 1-buten-3-yl or 1-butin-3-yl.  There may also be incorporated a chlorinated benzoic acid, for example 2,3,5,6-tetrachlorobenzoic acid, or alpha-chlordiallylacetamide, or a chlorinated lower fatty acid, for example trichloracetic acid, alpha, alpha-dichlorpropionic acid, alpha, alpha-dichlorbutyric acid, alpha, beta, beta-trichlorisobutyric acid alpha, alpha, beta-trichlorbutyric acid or their salts, esters, or amides.  Fertilizers preferably calcium nitrate may also be incorporated.  Specified active ingredients are N - methyl - N - phenyl - N1 - dimethyl urea, N - hydroxyethyl - N - phenyl - N1 - dimethyl urea, N - b  - hydroxypropyl - N - phenyl - N1-dimethyl urea, N - phenyl - N1 - methyl - N1-methoxy urea; the corresponding N-tolyl, N-xylyl -, N - ethylphenyl and N - isopropylphenyl urea derivatives; the corresponding N1-methyl-N1-methoxy urea derivatives of the first, second and third of the above ureas, the methyl-, ethyl -, isopropyl -, - allyl - butenyl -, butinylesters of phenyl- and metachlorphenyl and meta-tolyl carbamic acid.
Patent GB-1336100-A (GB)
Title: Torque converters with built-in disc clutches
IPC: F16H61/14
Filed: 1972-08-15
Abstract: 1336100 Clutch combinations ZAHNRADFABRIK FRIEDRICHSHAFEN AG 15 Aug 1972 [18 Aug 1971] 38032/72 Heading F2C A bridging clutch 3 for a torque converter 1 comprises a driven disc carrier 7 which is made of sheet metal and is secured to the turbine hub and additionally to the turbine wheel 6 in the region of the vanes 9. A sufficiently rigid construction is thus obtained with relatively thinwalled sheet metal both for the disc carrier 7 and the turbine wheel 6.
Patent GB-1114086-A (GB)
Title: Process for the wet spinning of threads from poly-2,6-disubstituted paraphenylene ethers
IPC: C08L25/06
Filed: 1966-08-25
Abstract: Poly - 2,6 - dimethylparaphenylene ether in chloroform solution is stabilized against the action of light and/or oxygen by the incorporation therein of 2,4-dihydroxybenzophenone.ALSO:Filaments based on poly-2,6-disubstituted paraphenylene ethers as claimed in claim 17 of Specification 930993 are coated with a 2,4-dihydroxybenzophenone or 2-mercaptothiazole in solution in a common solvent with a polymer such as cellulose acetate, PVA, PV acetate, polymethylmethacrylate, polyacrylic acid or polyacrylonitrile, to produce a light-stabilizing sheath around them. The solvent is removed by evaporation, or the polymer is chemically coagulated.  The uncoated filaments may be cut into staple fibres which are spun into a non-pilling yarn and knitted into crease resistant fabrics.
Patent GB-1152822-A (GB)
Title: Winding of Coils
IPC: H01F41/082
Filed: 1966-08-26
Abstract: 1,152,822. Covering non-circular formers by winding. SIEMENS-SCHUCKERWERKE A.G 26 Aug., 1966 [31 Aug., 1965], No. 38498/66. Heading B8G. A wire winding arrangement, Fig. 2, for formers 1 of other than cylindrical form comprises one or more idle rollers 15, 16 biased by spring means 17 towards a driven roller 7, the former 1 being gripped between the driven roller 7 and the idle rollers 15, 16 to cause the former to rotate relatively to the rollers, there being a supply roll 3 of wire at a predetermined distance from the driven roller 7. In Fig. 2 the rollers 15, 16 are slidably mounted on an arm that pivots about the driven roller 7 to permit the centre of gravity G of the winding to be substantially vertically below the roller 7. In Fig. 1(b), not shown, the aforesaid arm is fixed in a vertical setting. In Fig. 3 the axis of the non-circular former 19 is vertical, the former 19 being held against rotation by clamping means 21. The supply roll 3 is carried by an arm 4 around the former 19 by means of a driven roller 7 acting on the inner periphery of the former and idle rollers 8 acting on the outer periphery of the former. The driven roller 7 may have teeth meshing with teeth on the former. Fig. 5 (not shown), shows how the inner roller 7 can be replaced by a guide member (27) carried by a pin (29) on an endless chain (30) disposed within the former.
Patent GB-848124-A (GB)
Title: Improvements in or relating to suspension strips for file folders
IPC: B42F15/00
Filed: 1957-12-12
Abstract: 848,124. Suspension filing systems. WINGEREI, A. T. Dec. 12, 1957 [Dec. 18, 1956], No. 38650/57. Class 146(1). In a file folder 1 of the kind provided with a metal suspension strip which is slidable along supporting rails and an additional suspension strip of inverted U- shaped section which can be hooked on to a slidable suspension strip of an adjacent file folder, the slidable suspension strip 2 is provided at each end with a plastic sliding element 5 having a recess 8 straddling one of the supporting rails for sliding movement thereon, the plastic sliding elements also having shoulders 10 which abut against the inverted U-section suspension strip 3 on an adjacent folder 4 when hooked on to the slidable suspension strip to prevent relative lateral displacement of the suspension strips. The ends of the suspension strip 2 are received in slots in the upper sides of the elements 5. In a modification the strip 2 is replaced by a folded steel strip of inverted U-section and each of the elements 5 has a wing on its upper side which fits into the fold of the strip. In this embodiment the strip corresponding to the strip 3 has projections at each end which overlie the plastic sliding elements.
Patent GB-1120729-A (GB)
Title: Dental handpiece and collet wrench therefor
Inventor: STAUNT MARTIN
IPC: A61C1/14
Filed: 1966-08-31
Abstract: 1,120,729. Dental handpieces. AMERICAN HOSPITAL SUPPLY CORP. 31 Aug., 1966, No. 38796/66. Heading A5R. [Also in Division B4] A dental handpiece is provided in combination with a separate tool F having a shaft 31 and pins 40 which can be inserted into a central bore 30 in the handpiece chuck 17- and into sockets 43 in the handpiece turbine rotor 15, 16 to enable the chuck to be adjusted on screw threads 25 relative to the rotor so as to grip or release the burr E. The tool comprises two parts 32, 33 secured together so that they may be rotated relative to each other to cause the rectangular-sectioned shaft 31 on a part 35 of the part 32 to move relative to the pins 40 on the part 33, the pins being inserted into the sockets 43 on the rotor after passing through holes 42 in the handpiece housing so that the pins secure the rotor against rotation. The chuck 17 is provided with jaws 28 at one end to grip the burr and the air supply to the turbine also provides a jet of air 24 adjacent the burr which is used to entrain water from a tube 45 onto the working surface.
Patent GB-939046-A (GB)
Title: Improvements in or relating to clamping devices
Inventor: TAYLOR FREDERICK GEORGE
IPC: B25B5/12
Filed: 1961-11-01
Abstract: 939,046. Clamp fastenings. SPEED TOOLS Ltd. July 26, 1962 [Nov. 1, 1961], No. 39139/61. Class 44. A clamping device has a clamping member 14 in the form of a a plunger or ram, the clamping member being mounted for sliding movement in a bearing block 13 form. ing part of the device, a toggle operating mechanism 17 for the clamp - ing member comprising a connecting link 26 and an operating member 18 pivotally connected together, wherein the operating member is pivotally connected to an adjustable block 23 which is arranged with its longitudinal axis in line with the longitudinal axis of the clamping member so as to allow angular movement of the toggle operating mechanism about the longitudinal axis of the clamping member which is rotatable in its bearing block to permit such adjustment. The bearing block and the adjustable block are carried by a common U-shaped bracket 10 and the operating member is a bell-crank lever, the long arm of which is provided with a handle 20. Movement of the member 18 is limited by a transverse pin 28 which engages the connecting link. The clamping member is internally threaded to provide for positive attachment of auxiliary tools or other members.
Patent GB-1014433-A (GB)
Title: Apparatus for earth boring
Inventor: HADEN ELARD LEE
IPC: E21B10/16
Filed: 1963-10-04
Abstract: 1,014,433. Boring earth &c. CONTINENTAL OIL CO. Oct. 4, 1963 [Oct 23,1962], No. 39216/63. Heading E1 F. A bit has a rotary cutter with rings of teeth having tips which in their operative position lie at right angles to a radius of the hole being cut. In the construction shown in Figs. 6-8 the bit 150 has cutters 162, 163 adapted to enlarge a pilot hole 160 to form a hole 166. In the modification shown in Fig. 12 the bit has cutters 204, 206, the cutter 206 having radial cutting edges 208 which initially form a shallow pilot hole 240. The teeth 208, 210, 212 are formed of material harder than the material of the remaining teeth.
Patent GB-798018-A (GB)
Title: Improved hydroforming process
IPC: C10G35/085
Filed: 1956-12-27
Abstract: In hydroforming naphthas in the presence of a platinum-group metal catalyst the naphtha feed is separated into a first fraction boiling below 200 DEG  F. and a second fraction boiling above 200 DEG  F. and each fraction is separately hydroformed, the first fraction being hydroformed under conditions of lower hydrogen partial pressure and lower total pressure than the second fraction.  It is preferred that one or more of the following conditions are also employed during the hydroforming of the lower boiling fraction as compared to conditions when hydroforming the higher boiling fraction.  The hydrogen-containing recycle gas has a higher heat capacity due to the presence of a higher volume content of hydrocarbons; this may be accomplished by the extraneous addition of hydrocarbons, this also reduces the partial pressure of the hydrogen, alternatively the effluent from the hydroforming may be condensed at a higher temperature, e.g. at 200-325 DEG  F. instead of 90-115 DEG  F., whereby less hydrocarbon content is removed by condensation.  The hydrogen-containing gas is fed at a lower rate to the system, in which case the total reaction pressure is preferably less, this prevents the necessity of increasing the energy requirements for circulating the recycle gas.  Using a platinum or palladium catalyst suitably supported the following conditions are preferred for the hydroforming of the higher boiling fraction, corresponding figures for the lower boiling fraction being given in parentheses: Inlet temperature  DEG  F. 900-1000 (900-1000) Total pressure, p.s.i.g. 350-600 (50-300) Residence time, sec. 4-20 (8-25) Recycle gas feed to reactor, SCF/barrel oil 4,000-10,000 (1500-3000) Density of recycle gas relative to air . 0.1-0.4(0.4-1.0) Concentration of H2 in recycle gas, mol. per cent . . . 70-95 (55-75) Temperature of condensation of products  DEG F. . . 90-115 (200-325) Specification 742,563 is referred to.