baber/WOPTO huggingface dataset:
Patent GB-1335757-A (GB)
Title: Impeller construction
IPC: F01D5/28
Filed: 1971-09-21
Abstract: 1335757 Impeller blades W SEEBER [trading as WILLI SEEBER] 21 Sept 1971 [21 Sept 1970] 43850/71 Heading F1T A fan or pump impeller of metal and/or synthetic resin is built up of blades attached by root portions to a hub member, mutually adjacent faces of adjacent root portions having complementary projections and recesses to locate the root portions with respect to each other, the faces, projections and recesses being arranged so that when the blades are assembled together in the absence of the hub member, the root portions lie along a turn of a helix rather than a flat ring; when the assembly is subjected to slight resilient deformation, a closed ring is obtained, the last pair of co-operating formations snapping into each other. The root portions 2 of the impeller blades 1 each have a groove 7 and a projection 12 on one side surface 4 and a corresponding rib 6 and recess 14 on the other side surface 5. When the root portions 2 have been juxtaposed to form first a helix and then a complete ring 2', each rib 6 engages an adjacent groove 7 and each projection 12 engages an adjacent recess 14 to interlock the root portions, and grooves 8 on the root portions form continuous annular grooves in the complete ring. To provide overlap between adjacent blades 1 when viewed in the axial direction, the surfaces 4, 5 are each inclined at an acute angle to a radial plane which is perpendicular to the plane of rotation. A recess 10 in each root portion 2 is provided with reinforcing ribs 11. The blades 1 and root portions 2 are moulded from synthetic resin, and the hub 3, also of synthetic resin, is moulded around the ring 2' to form projections which enter the grooves 8 and the recesses 10. The hub may instead be made of two axially separable halves, of metal or synthetic resin, which are clamped together by screws to hold the ring 2'. The formations 6, 7, 8, 12, 14 can be of rectangular, semicircular, wedge or dovetail shape.
Patent GB-1478690-A (GB)
Title: Manufacture of aqueous polyester imide dispersions
IPC: C09D179/08
Filed: 1974-10-10
Abstract: 1478690 Aqueous polyester imide dispersions BSAF AG 10 Oct 1974 [11 Oct 1973 (2)] 43886/74 Heading C3R In a process for the manufacture of an aqueous polyester imide dispersion containing 20 to 60 wt. per cent of particulate polymer of maximum size 5 microns a molten polyesterimide is solidified, comminuted in the dry state to below 100 microns at below 100 C., and then milled in water at below 80 C. till the maximum size is below 5 microns with more than 80% of the particles below 1 micron. The aqueous dispersion may also contain 0À1 to 10 wt. per cent of a dispersing aid, 0À2 to 5 wt. per cent of an esterification catalyst, 0À1 to 10 wt. per cent of a flow promoter and 0À1 to 25 wt. per cent (all on solids) of a filler. Numerous such compounds and monomers for the polymer are specified. The dispersion may be of pH 5 to 9. The dispersion may be used to provide electrically insulating coatings or as heat resistant adhesives and impregnants.
Patent GB-1417300-A (GB)
Title: Pmc time division multiplex telecommunications networks
IPC: H04Q11/04
Filed: 1973-09-19
Abstract: 1417300 Automatic exchange systems SIEMENS AG 19 Sept 1973 [22 Sept 1972] 43958/73 Heading H4K In a PCM TDM inter-highway switching system, broadband or high bit rate signals occupying a number N of time channels (not necessarily consecutive in time) on an incoming highway are transferred to the same number N of time channels (usually exhibiting a different time spacing) on an outgoing highway, the time sequence order is maintained and signals from the first of said number of channels on the incoming highway are transferred to the first channel of the number on the outgoing highway that follows a total of N or N+ 1 channels on the two highways. The Figure shows two frames on each of two synchronized highways A and B. A broadband signal occupying eight channels is transferred from highway A (slots a 1  to a s ) to highway B (slots b 1  to b 8 ). The signal from slot a 1  in each frame is transferred to a time slot b6 on highway B that is the first to follow a total of eight (this being the number of channels) time slots a 1  to a 3  and b 1  to 6 5  since the beginning of the frame. If the required number of channels is not free on a single outgoing highway the channels may be divided into groups which are distributed successively over a plurality of highways extending in the same direction, the channels in each group being transmitted on its highway in the manner set out above and combined cyclically on a single highway to restore the sequence at the receiving end. The object of the invention is to allow the sequence order in each channel to be preserved and to eliminate any need to store codes for more than one frame.
Patent GB-1473594-A (GB)
Title: Mounting arrangements for electric resistance heating elements
IPC: H05B3/76
Filed: 1975-09-11
Abstract: 1473594 Electric resistance heating ASSOCIATED ELECTRICAL INDUSTRIES Ltd 11 Sept 1975 [10 Oct 1974] 43963/74 Heading H5H An end 11, Fig. 2; 27, Fig. 4 of a tubular sheathed electric resistance heating element 1 extends through an aperture 8 in a supporting member 5, Fig. 2; 29, Fig. 4, where it is wedged by means of a wedging member 9, Fig. 2; 30, Fig. 4, forced into a second aperture 10 that distorts material around the first aperture so that the element is gripped. The wedging member 9, 30, may be a ball or other tapered or curved member. A wedge in one such second aperture 10 may grip two ends 11, 27 of a heating element 1 in respective apertures 8. Two such second apertures may lie on opposite sides of the two ends. The supporting member is a hollow cylinder with the apertures in the end wall and a circumscribed groove 15 to hold grease to permit swivelling of the element 1 when member 29 is in a hollow cylindrical bearing 31 secured to a protrusion in reflector 24 (see Fig. 4). Reflector 24 is secured to a hob top by means of stud 26.
Patent GB-1026217-A (GB)
Title: Lubricated tapping tee for gas or like mains
IPC: B23B41/08
Filed: 1963-11-07
Abstract: 1,026,217. Drilling machine details. DRESSER INDUSTRIES Inc. Nov. 7, 1963 [Nov. 15, 1962], No. 43968/63. Heading B3C. A tool for drilling into a gas main comprises a T-piece welded to main 12, a drill A which is screwed through the T-piece to remove a core from the main, and a cap 22 screwed to the T- piece. Drill A has a screwed body 24, a wrench socket 26, a conical shoulder 28, and a tubular cutting end 29, of oval cross-section. Four cutting edges 33 are defined by notches 34, and end 29 is packed with grease, which is initially extruded through notches 34. When the notches are closed during drilling, the lubricant is forced through a radial passage 36. During drilling, the drill passes through the main, until shoulder 28 engages the upset portion of the hole, and provides a seal, Fig. 11 (not shown). Cutting end 29 yields and when the hole is completed, the cutting edges grip the slug, so that when drill A is retracted, it removes the slug.
Patent GB-1117604-A (GB)
Title: Digital code patterns
Inventor: MESTON SPENCER DAVIDSON
IPC: H03M1/00
Filed: 1964-10-29
Abstract: An optical digital code pattern is formed on a base 11 by placing face-to-face with it a mask 12 having one aperture 13 for each column 1-4 of the code of the shape and size of the required opaque or transparent areas of the respective column, intermittently relatively moving the base and mask parallel to the columns by increments equal to (for negative representation) or a multiple of preferably twice (for positive representation) the smallest aperture length, and selectively energizing light, preferably ultraviolet, or metal, e.g. evaporated under vacuum, sources for the apertures at each stationary position to expose to light or coating with metal areas of the base comprising part of a representation of an optical digital preferably the Gray binary code pattern. For using light sources, the base may be of glass having a coating of photo-resist material on the facing surface. The base may be plane or a drum or with the pattern in concentric circles.
Patent GB-966403-A (GB)
Title: Process for the preparation of pure benzene
IPC: C07C7/163
Filed: 1960-12-22
Abstract: Pure benzene is obtained from crude benzole by a catalytic hydrogenative pressure refining in which simultaneous aromatization of non-aromatic impurities occurs using as catalyst chromium oxide on bauxite and recovering benzene by distillation. The refining conditions may be 480-550 DEG  C. and 5-15 atmospheres hydrogen partial pressure and the catalyst may also contain molybdenum, e.g. as oxide.
Patent GB-1357154-A (GB)
Title: Alkylthio-nitro-aniline compounds and herbicidal 'ompositions  containing them
IPC: A01N33/18
Filed: 1971-09-23
Abstract: 1357154 Nitroaniline derivatives SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ NV 23 Sept 1971 [25 Sept 1970 (2)] 44448/71 Heading C2C Nitroaniline derivatives of a general formula in which R is lower alkyl of 1 to 3 carbon atoms , R<SP>1</SP> and R<SP>11</SP> are each the same or different and represent alkyl of 1 to 7 carbon atoms, alkenyl of 2 to 7 carbon atoms or cycloalkyl with 3 to 7 carbon atoms with the proviso that R<SP>1</SP> and R<SP>11</SP> combined do not contain more than 8 carbon atoms, and n is zero or one are prepared when n is 0 by (a) reacting a 4-(alkylthio)phenol with a dialkyl sulphate to form a 4-hydroxyphenyl dialkyl sulphonium alkyl sulphate; (b) dinitrating the resulting 4-hydroxyphenyl dialkyl sulphonium alkyl sulphate with nitric acid in the presence of sulphuric acid to form a (3,5- dinitro - 4 - hydroxyphenyl)dialkyl sulphonium alkyl sulphate; (c) reacting the (3,5-dinitro-4- hydroxyphenyl)dialkyl sulphonium alkyl sulphate with an aqueous alkali metal halide to form a 2,6 - dinitro - 4 - (alkylthio)phenol; (d) reacting 2,6 - 6 - dinitro - 4 - (alkylthio)- phenol with a chlorinating agent selected from the group consisting of thionyl chloride, phosgene or phosphorus oxychloride in carbon tetrachloride in the presence of a catalytic amount of dimethylformamide to form a 4 - chloro - 3,5 - dinitro - phenyl alkyl sulphide; and (e) treating the 4-chloro-3,5-dinitrophenyl alkyl sulphide with a dialkyl amine to form a 4 - (alkylthio) - 2,6 - dinitro - N,N - dialkylaniline; when n is 1 the compound formed in (e) above is oxidized to form 4-(alkylsulphinyl)- 2,6 - dinitro - N,N - dialkyl - aniline. There is also described the preparation of 4-(methylsulphonyl) - 2,6 - dinitro - N,N - dipropyl aniline by oxidizing the 4-(methylthio-2,6- dinitro - N,N dipropylaniline and the 4- (methylsulphinyl) - 2,6 - dinitro - N,N - dipropyl aniline with hydrogen peroxide.
Patent GB-1136038-A (GB)
Title: Improvements relating to organic phosphites
IPC: C08K5/527
Filed: 1966-10-05
Abstract: 1,136,038. Dioxaphosphorinane phosphite derivatives. PURE CHEMICALS Ltd. 5 Oct., 1966 [3 Dec., 1965], No. 44572/66. Heading C2C. [Also in Division C3] Novel phosphites have the general formulµ where R<SP>1</SP> and R<SP>2</SP> are alkyl, -OR<SP>3</SP>O- is the divalent residue of a member of the group consisting of D dihydric alcohols having at least 4 carbon atoms separating the hydroxyl groups and (2) dihydric phenols or bis-phenols, including hydrogenated and halogen or alkylsubstituted bis-phenols, having at least 4 carbon atoms and in some cases sulphurcontaining radicals separating the phenolic groups, R<SP>4</SP> and R 5  are alkyl, aryl or haloaryl, n is an integer of from 1 to 3 and x + y = 3-n. Compounds of the first general formula above are prepared by reacting a phosphite of formula P(OR<SP>4</SP>)(OR<SP>5</SP>)(OR<SP>6</SP>) with R<SP>1</SP>R<SP>2</SP>C(CH 2 OH) 2  and HOR<SP>3</SP>OH, and by reacting the product with additional phosphite in a second stage, compounds of the second general formula above are obtained. Alternatively, the compounds of the second formula may be obtained directly in a one-step reaction by reacting P(OR<SP>4</SP>)(OR<SP>5</SP>)(OR<SP>6</SP>) and HOR<SP>3</SP>OH with a heterocyclic phosphite of formula If excess phosphite of formula is used in the second stage of the 2-step reaction or in the one-step reaction, products of the third general formula above are obtained. The reactions are generally carried out in the presence of a dihydrocarbyl or dihaloaryl phosphite or an alkaline catalyst, The compounds are stabilizers for polymers.
Patent GB-1401494-A (GB)
Title: Brush assembly for use in a small dynamo-electric machine
IPC: H01R39/24
Filed: 1972-09-27
Abstract: 1401494 Brushgear for dynamo-electric machines PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 27 Sept 1972 [30 Sept 1971] 44605/72 Heading H2A Brush contact vibrations in a dynamo-electric machine are damped out with the aid of plastically deformable material positioned in contact with the brushes. In the D.C. tape recorder motor shown, two brushes 17 which contact the segments 20 of a planar commutator 18 are each in the form of a pair of leaf springs 24, a cross part 31, and also a further pair of leaf springs 32, and plastically deformable polyvinylacetate material 22 is positioned in the region between the areas 31/32 of the brushes and a support plate 16 whereby to stick to both the brushes and the support plate, and so to damp out vibrations. The motor, which drives a belt pulley 11, comprises a permanent magnet stator 13 with an injection moulded thermoplastic core 14 mounted on a projection 15 of an end plate 3, and also an armature coil 12 on a former 9 on a spindle 7 mounted in bearings 5, 6.
Patent GB-1357027-A (GB)
Title: Pleiadene and dibenzoheptalene derivatives
IPC: C07C63/49
Filed: 1971-09-27
Abstract: 1357027 Pleiadenones and dibenzoheptalenones; organolithium compounds SANDOZ Ltd 27 Sept 1971 [1 Oct 1970] 44811/71 Headings C2C and C2J Novel pleiadenones and dibenzoheptalenones of the general formula wherein n is 1 or 2, R 1  is a hydrogen, fluorine or chlorine atom or a trifluoromethyl group and R 2  is as R 1  or a straight chain C 1 -C 4  alkyl or C 1 -C 4  alkoxy group, provided that R 2  is other than an alkoxy group when n is 1, are prepared by cyclization of an o-toluic acid derivative of the general formula wherein Z is a hydroxy or C 1 -C 4  alkoxy group or a chlorine, bromine or iodine atom. o-Toluic acid derivatives of the second general formula above wherein Z is a hydroxy group are prepared by reaction of a ketone and a lithium compound of the respective general formulae wherein R 3  is a C 1 -C 4  alkyl group, followed by hydrolysis, treatment of the resulting otoluamide derivative of the general formula with a strong base, followed by a strong mineral acid, and reduction of the resulting lactone or hydroxy-carboxylic acid of the respective general formulae The lithium compounds of the fourth general formula above are prepared by treating the corresponding 2 - methyl - 4 - R 1  - N - R 3 - benzamide with a n-butyl lithium.
Patent GB-1274396-A (GB)
Title: Improvements in or relating to servo systems
IPC: G05D3/12
Filed: 1970-09-21
Abstract: 1,274,396. Automatic control of aircraft. BENDIX CORP. Sept. 21, 1970 [Oct. 20, 1969], No. 44818/70. Heading G3R. [Also in Division G1] In a servosystem, for example, an aircraft autopilot arrangement, including a servomotor 28 to drive an element such as a control surface 44 in accordance with a control signal from a source 10, means are provided for engaging and disengaging the servomotor from the element. The possibility arises that at a moment when an aircraft pilot switches to automatic pilot, control signals exist which cause a rapid change of the aircraft attitude thereby resulting in passenger discomfort. It is therefore necessary to "match" the conditions before and after switch over, and a clutch 43 between motor 28 and surface 43 is arranged to be engaged only after a delay during which time the error signal is reduced to a low level so that excessive movement of surface 44 does not occur. As shown a pitch control signal which is dependent on aircraft attitude and which is derived from a source 10 which may include a gyro, is fed to a capacitor 16 through a transistor 12. The transistor 12 operates on one set of halfcycles of a supply from a transformer 14 and during the other half cycles the capacitor voltage is fed via a transistor 11 to a line 22a providing a square waveform (11a) in Fig. 2 (not shown). The line 22a is connected via an amplifier 23, phase detector 24 and drive circuit 25 to motor 28 which is disposed in a bridge circuit. This bridge is balanced under stalled conditions, and under running conditions the voltage appearing at 32 is a measure of the back e.m.f. across the motor and hence the motor speed. This signal is integrated in a circuit 20, 21, the voltage obtained being representative of displacement. This feedback voltage is fed to the line 22a via a transistor 17 which opens alternately with the transistor 11, providing a square waveform (17a) in Fig. 2. (not shown) interdigitated with that from transistor 11. The signal fed to the phase detector 24 is the square wave "difference" of these two signals, and the phase of the signal determines the sense of the signal fed to the motor and hence the direction of rotation. After the circuit is switched on by closing switch 7 a delay occurs before the clutch 42 imposes load on the motor. During this period (when a control signal is being derived from source 10) the motor runs at rapid speed quickly building up voltage on capacitor 21 and hence reducing the signal applied to the motor circuit, so that when the clutch operates the motor is running at slow speed and no rapid movement of surface 44 occurs.
Patent GB-1499110-A (GB)
Title: Disposable caps
IPC: A42B1/04
Filed: 1974-10-16
Abstract: 1499110 Caps PAPERLYNEN CO Ltd [trading as PAL WEAR DISPOSABLES] 23 Sept 1975 [16 Oct 1974] 44916/74 Heading A3V A disposable cap comprises a paper or like sheet material flattened open-ended tubular head band (1) with transverse creases (6) dividing it into three sections (7, 8, 9) and enabling it to be folded into a flattened tube with the ends overlapping one another, and an accordion-pleated paper or like sheet material crown 2 having transverse creases therein to provide folded ends and gummed longitudinally to and between the opposed sections of the folded headband tube. Crepe paper headband (1) is folded along longitudinal creases (3) and secured by gumming at 4. Tissue paper crown 2 is accordion-pleated and secured to headband 1 by gumming 5. The assembly is folded about creases (6) and the surplus length 10 of crown 2 gummed to section 9. Section 9 is tucked into section 7 to the desired extent indicated by marks 11 and held by friction.
Patent GB-1513500-A (GB)
Title: Clutch disc
IPC: F16D13/64
Filed: 1976-10-29
Abstract: 1513500 Mounting clutch parts on hubs BARKAS-WERKE VEB 29 Oct 1976 [5 Dec 1975] 45063/76 Heading F2U A clutch disc drive plate 1 or cover plate is secured to its hub 3 by beading and caulking an axially projecting portion 4<SP>1</SP> of the hub such that the material of the hub fills recesses 11 in the bore of the plate. The recesses 11 may be semicircular or sinusoidal and the securing process effected by a press. Two cover plates may be secured on the hub in the same fashion.
Patent GB-1108650-A (GB)
Title: An exposure compensatory device for single lens reflex cameras
Inventor: FUJII TATSUO
IPC: G03B7/20
Filed: 1966-10-10
Abstract: 1,108,650. Single lens reflex cameras. NIPPON KOGAKU K. K. Oct. 10, 1966, No. 45112/66. Heading G2A. In a single lens reflex camera having exchangeable focusing screens and a photo-electric exposure meter, a compensating arrangement is provided to compensate for the variation of light transmitting properties of the various screens. In one embodiment, Figs. 3 and 4, the particular focusing screen in use is indicated by a scale 3a co-operating with a film speed scale 4a. Rotation of a knob 2 rotates ring 4, sets the shutter speed, thereby a gear ring 7 through a gear 4b. The diaphragm setting ring (not shown) is then rotated, thereby varying an electrical resistance 9 which varies the current flowing in the exposure meter circuit which includes a photo-electric cell (D) Fig. 1 (not shown). The diaphragm setting ring is adjusted until a galvanometer needle coincides with a reference mark. In another embodiment, Fig.7  to 10 (not shown) introduction of focusing screens (S 1 ) (S 2 ) provided with a notch or abutment (S1' or (S2') respectively pivots a plate (121) which actuates a ring (113) rotatable with a ring (107) carrying a resistor (108) engaged by contacts 112, 112' on a ring (110), such that relative rotation of ring (110) and ring 107 varies the resistance of resistor (108) included in the exposure meter circuit. In another modification Fig. 5 (not shown) it is possible to compensate for different maximum apertures of interchangeable objectives by rotation of an aperture index ring (16) having a mark (16b) co-operating with marking on a scale 3a
Patent GB-1270406-A (GB)
Title: Spectacle frames
Inventor: GITLIN MANUEL MICHAEL
IPC: G02C5/16
Filed: 1969-09-12
Abstract: 1,270,406. Spectacle frames. M. M. GITLIN and C. F. LEVY JNR. Sept. 12, 1969, No.45167/69. Heading G2J. A spectacle frame incorporating removable lens mounting means 65 and a resilient pad 58 overlying the nasal bridge of the wearer has side members 43 whose ends 50 curve slightly upwards and whose rear sections 47 are made of resilient material, these rear sections being urged inwardly against the posterior of the skull of the wearer in the temporal-parietal-occipital area so that the frame engages only the least sensitive areas of the nose and skull. The forward section 46 of each side member is of conventional design and is press fitted or otherwise secured to an elongated metal rod 48 extending from the corresponding rear section 47. The nose pad 58 is removably secured by a metal snap 56 in a recess 57 formed in the rear face of the bridge 55 of the frame, Fig.8. The rear face of the front section 42 of the frame is provided with two curved grooves, open and closed at their inner and outer ends respectively; in each groove is removably mounted, Fig.7, a steel lens supporting member 65 provided with a groove 67 in which is rivetted the upper edge of a lens L. Magnets 72 or magnetic foamed liners may be provided to prevent undesirable relative movement between the members 65 and the front section 42. In alternative embodiments the front section 42 and the side arms 43 may be made from a continuous strip of spring steel bent into a generally U-shaped configuration, Fig. 1 (not shown), and provision may be made for the removable mounting of decorative overlays to the frame, Figs. 10-12 (not shown).
Patent GB-1002823-A (GB)
Title: Hydrogenation process
IPC: C07C5/08
Filed: 1961-12-18
Abstract: The selective partial hydrogenation of a compound capable of being partially hydrogenated in admixture with a hydrogenatable compound incapable of being partially hydrogenated containing sulphur compounds of class B is effected in the presence of a supported elemental nickel catalyst and continuously or intermittently added sulphur compounds of class A; class A compounds are thiophenes, thiacycloalkanes having at least four carbon atoms in the ring and dialkyl monosulphides, class B compounds are sulphur and compounds with hydrogen and/or carbon not in class A.  The nickel may be supported on alumina, kieselguhr, chalk, silica gel or sepiolite and may be sulphided at 0-200 DEG  C. with a thiophene in the presence of hydrogen. Hydrogenation is effected at 50-250 DEG  C., preferably in the liquid phase.  The class A compound added is preferably separable by distillation and is separated from the product and recycled.  The partial hydrogenation of isoprene in the presence of isohexenes is exemplied.