baber/WOPTO huggingface dataset:
Patent GB-1174352-A (GB)
Title: Novel Polymers
Inventor: JONES JOHN IDRIS
IPC: C08G73/06
Filed: 1967-02-16
Abstract: 1,174,352. Condensation polymers &c. NATIONAL RESEARCH DEVELOPMENT CORP. 9 Feb., 1968 [16 Feb., 1967], No. 7549/67. Heading C3R. The invention comprises polymers with units of formula where R<SP>1</SP> represents a tetravalent radical consisting of or including a mono-, di- or polycyclic aromatic or heterocyclic ring structure with four valence bonds extending each from a separate carbon atom, R<SP>2</SP> is an alkylene, arylene or heterocyclic group or combination of groups linked together directly or through a hetero atom, and the remaining nitrogen atoms are joined to further such groups or to hydrogen atoms or alkyl, aryl or heterocyclic groups. The polymers are prepared by reacting a tetranitrile of formula with a diamine of formula different structures of the polymer being obtained depending on whether equimolar proportions are used or 1 mole of tetranitrile is reacted with 2 moles of diamine or 1 mole of tetranitrile is reacted with 3 moles of diamine. Alternatively, the polymers may be prepared by reacting a tautomeric tetraimine of formula with a diamine of formula In examples polymers are obtained by reacting pyromellitonitrile with 4,4<SP>1</SP>-diaminodiphenyl ether, with m-phenylene diamine, with pphenylene diamine, with 4,4<SP>1</SP>-diaminodiphenyl methane, with 4,4<SP>1</SP>-diaminodiphenyl sulphoxide and with 2,6-diamino pyridine; by reacting diamino - diiminobenzobispyrrole with pphenylene diamine, with m-phenylene diamine and with 4,4<SP>1</SP>-diaminodiphenyl ether; by reacting tetracyanothiophene with 4,41-diaminodiphenyl ether and with m-phenylene diamine; and by reacting tetracyano-1,4-dithiin with 4,4<SP>1</SP>- diaminodiphenyl ether; some of the polymers are further reacted with 4,4<SP>1</SP>-diaminodiphenyl ether, m-phenylene diamine, pyromellitonitrile dianhydride and benzophenone tetracarboxylic dianhydride.
Patent GB-272988-A (GB)
Title: Improvements in or relating to inductance coils for use in connection with wireless apparatus
IPC: H01F27/00
Filed: 1926-03-18
Abstract: 272,988. Igranic Electric Co., Ltd., Curtis, A. H., and Alford, W. K. March 18, 1926. Addition to 270,411. Inductances.-Consists in modifications of the composite inductance coil of the parent Specification. In one construction, Fig. 2, the component coils 1<a> are located between skeleton projections 2a integral with the former 2, these projections serving also to keep the supporting-band 3 away from the winding. In another construction, Fig. 3, the composite coil is secured to a wide plug mount 4 by a lashing 5 and band 3. In a further construction, Fig. 7, the component coils are separated by spacing washers 8 and are housed in a support comprising flanged discs 7a bolted together. Specification 260,670 is referred to.
Patent GB-269149-A (GB)
Title: Improvements in case for measuring tapes and the like
IPC: G01B3/10
Filed: 1927-03-18
Abstract: 269,149. Starrett Co., L. S., (Assignees of Simpson, R. J. 0.). April 8, 1926, [Convention date]. Measuring-tapes.-In a case for tape measures formed of metal discs having a leather or similar cover, the discs 1 have abutting flanges 2 with peripheral grooves 4 adapted to be engaged by a split clamping ring 8. The leather covering discs 7 are clamped in the grooves 4 by the ring, and are secured at the centres bv the usual washers 3. The ends of the split rings 8 are turned over the flanges 2 where they are cut away to form a tape opening 6, and are held by an eyelet 10.
Patent GB-563995-A (GB)
Title: Organo silicon polymer condensation products and methods of making them
Filed: 1942-06-04
Abstract: Moulding powders are obtained from hydrolysable organo silicanes having methyl, ethyl propyl or phenyl radicles as organo substituents and halogens or ethoxy radicles as hydrolysable substituents by hydrolysing the silicanes and pulverising the hydrolysis products with a small proportion of anhydrous boric oxide, i.e. about 3 per cent.  The pulverised mixture is allowed to stand and may be moulded under pressure at about 170 DEG  C.  The powder may be mixed with fillers, e.g. glass fibres or flakes.
Patent GB-974206-A (GB)
Title: Resonator filtering system
Inventor: TILSTON WILLIAM VICTOR
IPC: H01P1/213
Filed: 1963-02-26
Abstract: 974,206. R.F. couplings. SINCLAIR RADIO  LABORATORIES Ltd. Feb. 26, 1963, No.  7671/63. Heading H4A. [Also in Division H1]  A filtering system for e.g. connecting an aerial A to a number of transmitters T utilizing  different frequency bands, comprises lines L  coupling a common junction J to a number of  resonators F, one or more of the resonators being spaced from the junction and coupled to it through one or more further resonators P. The resonators F, each tuned to a different frequency, are of high Q and hence of large size, so that it would not be possible to locate them all at the ends of the lines L. The latter form matching sections and have a length of either one quarter or one half-wavelength at the average frequency of the resonators F depending upon whether they are terminated by loops or by probes. The interposition of the small, relatively low Q, resonators P, resonant at the same frequencies as the corresponding resonators F, enables the latter to be spaced from the junction by an arbitrary distance. The system may be combined with that described in Specification 974,205.
Patent GB-540834-A (GB)
Title: Improvements in or relating to power amplifying circuits
IPC: H03F3/22
Filed: 1940-04-30
Abstract: 540,834. Valve amplifying circuits. FABRICA ITALIANA MAGNETI MARELLI. April 30, 1940, No. 7691. Convention date, May 3, 1939. [Class 40 (v)] A power amplifier has an input transformer 1 and an output transformer 2. Grid bias is supplied by a byepassed resistance 6, and since this bias varies with the change in anode current due to changes in the signal, a valve 8 is shunted across resistance 6, the impedance of the valve being varied by the signal applied from a winding 1<SP>11</SP> to grid g8, thus keeping the bias constant. A modification is also described, Fig. 2 (not shown), in which the grid bias is subject to variation due to changes in signal since it is derived 'from a section of a potential divider which is also traversed by the screen grid current. In this case the compensating valve is connected across the section of the potential divider which supplies the grid bias.
Patent GB-695737-A (GB)
Title: Improvements in cooling systems for internal combustion engines
IPC: F02B75/02
Filed: 1951-04-04
Abstract: 695,737. Cooling engines. GENERAL MOTORS CORPORATION. April 4, 1951 [April 22, 1950], No. 7766/51. Class 7 (ii). In an engine cooling system, e.g. for a compression-ignition two-stroke engine, a cooling liquid cavity and a number of cooling liquid passages are disposed on opposite sides of the engine cylinders and so arranged and interconnected that the hotter parts of the engine are cooled by forced circulation of the liquid and the cooler parts of the engine are cooled by convection circulation of the liquid within the cavity. As shown, a four cylinder in-line engine is provided on one side of the cylinders 11, 12, 13, 14 with cavities 131, 132, 133 separated from each other by walls 134, 136, and on the other side of the cylinders with chambers 113, 119 connected by passages 114, 116, 117, 118 between cylinder exhaust passages 107, 108, 109, 111. The chamber 119 is divided into two sections 128, 129. Cavity 132 is connected to the chamber 113 by passages 123, 137, and cavities 131, 133 communicate with the sections 128 and 129 by passages 121, 141, 122, 142 and 124, 138, 126, 139. Cooling liquid forced by a pump 37 through an oil-cooler chamber 53, and openings 54, 56 into the cavity 132 flows with a high velocity across the cavity into the passage 137 and through the passage 123 into the central portion of the chamber 113 from which portion the liquid then flows to both ends of the cylinder block 28, through the passages 114, 116 and 117, 118 into the sections 128, 129 and then through the passages 141, 142 and 138, 139 into the cavities 131, 133. Outlet passages, 143, 144 directly above the passages 137, 138, 139, 141, 142 allow the liquid to flow from the chamber 119 into the cylinder head 97 and then to a radiator. There are relatively stagnant bodies of liquid in the lower portions of the cavities bounded by the upper end of a wall 78 so that the lower parts of the cylinders are cooled by convection circulation of the liquid. Lubricating oil supplied through a fitting on the cover of the head 97 flows from the cover through tubular passages 81,... 84, housing valve push-rods, to the crankcase. The wall 78 together with walls 102, 103 form a charging and scavenging fluid manifold 104.
Patent GB-1181072-A (GB)
Title: Apparatus and Method for Determining the Emissivity Factor of a Body
Inventor: MURRAY THOMAS PATRICK
IPC: G01J5/00
Filed: 1967-02-17
Abstract: 1,181,072. Photo-electric emissivity measurement. UNITED STATES STEEL CORP. Feb.17, 1967 [Feb. 25, 1966], No.7768/67. Heading G1A. To measure the emissivity of a heated body, infrared radiation of a particular wavelength is compared with the same wavelength radiation from a black-body radiator at the temperature of the heated body. Measurements are made using an optical bench in which radiation from an electrically heated body and subsequently a black body radiator is filtered, chopped and focused on to a photo-resistive detector whose output is amplified filtered and displayed upon a cathode ray tube. The heated body and black body are positioned so that they each fill the field of view of the detector. In one arrangement shown in Fig. 6 a vessel 18b (shown exploded) contains a H 2 /N 2  gas mixture in which a body 10 is heated by an electrical element 18 supporting the body. The temperature of the body is measured by thermocouple 50 and maintained constant. Infrared radiation from the body leaves the vessel by an opening 18a and passes via lens 22, chopper 26, infrared filter 24 and a further lens 22a to a photo-resistor 20. The electrical output is amplified, filtered and displayed upon a cathode ray tube. For comparison a blackbody radiator Fig. 3 (not shown) replaces the vessel 18. In another embodiment Fig. 1 (not shown) the body of interest is heated in the atomosphere.
Patent GB-724975-A (GB)
Title: Improvements in intermittent cervical traction apparatus
IPC: A61F5/04
Filed: 1953-03-20
Abstract: 724,975. Surgical traction appliances. YELLIN, L. March 20. 1953, No. 7791/53. Class 81 (2). A traction device for extending the cervical vertebrae comprises a head harness F carried on a cord E which extends from a pillar D and is alternately pulled upwards and released by a lever which is oscillated by a motor driven cam 22. A spring connection H with an indicator is inserted in the cord E and the tension exerted may be adjusted by altering the position of the cable clamping bolt 30 in a slot 28 in the lever.
Patent GB-772361-A (GB)
Title: Improvements relating to hand looms
Inventor: SHARP JAMES LEONARD
IPC: D03D29/00
Filed: 1954-03-17
Abstract: 772,361. Shedding motions for hand looms. GARFITTS, Ltd. March 16, 1955 [March 17, 1954], No. 7796/54. Class 142 (2). A hand loom shedding motion comprises heald levers 14 raised by a manually rotated cam 16 and a pattern chain 21 engaged by members 31 on the levers, the chain being advanced by pawls connected to the mechanism for manually operating the cam 16. When the cam 16, which is in the form of a hollow roller, is turned about its pivot 15 by a handle 40, the cam engages rollers 18 on the levers 14 and raises all the levers. A cam 32, mounted on the pivot 15, turns with the cam 16 and engages a roller 35 and a member 39 and causes a pawl 38 to move away from, and to free the pattern chain and also causes a pawl 36 to move upwardly and advance the chain by one step. When the handle 40 is subsequently lowered, those levers 14 whose members- 31 coincide with holes in the pattern chain are lowered, the other levers remaining in the raised position. A counterweight 41 is provided. A weighted foot 37 keeps the pawl 36 against the patterns chain. Pattern chain. The chain comprises a number of transverse bars 22 connected by two springs 23. The end bars 24 are each half the width of one of the bars 22 and have slots 28 in which the ends of the springs are anchored by pins 29. A screw 26 secures the two end bars together. Holes 30 are provided in the bars 22 according to the pattern to be woven.
Patent GB-604442-A (GB)
Title: Improvements in or relating to electric resistance welding systems
IPC: B23K11/24
Filed: 1945-03-28
Abstract: 604,442. Supply systems for resistance welding. BUDD MANUFACTURING CO., E. G. March 28, 1945, No. 7837. Convention date, March 31, 1944. [Class 38 (iv)] In a resistance-welding system fed through back-to-back ignitrons 18, 19 from A.C. supply mains 13, 16, the opening of the welding circuit at the completion of a " normal weld " is effected by means de-energizing grid-controlled gas-filled tubes 24, 25 in the ignition circuit of the ignitrons either by means functioning on conclusion of a predetermined time period or automatically by means energized by the voltage drop across the electrodes 80, 81. In operation, with switches 14, 15 closed and A.C. applied to the primary 36 of a transformer 35 in the heat energy control circuit D, the initiating switch 57 is closed to cause a positive potential to be applied to the anode 54 of the gas-filled tube 53 to effect current flow through this tube and resistors 58 and 59, thereby impressing a positive D.C. potential on the grids 27 of the tubes 24 and 25, which strike to ignite the ignitrons 18, 19 and establish welding current through the primary of welding transformer 11. Simultaneously capacitor 77 in an adjustable timing circuit E starts to charge and when sufficiently charged, lifts the bias on the grid 72 of a tube 70, which then strikes to lower the potential of point 79 in the circuit C, whereby the tubes 24 and 25 are de-energized. Alternatively the voltage drop at the electrodes 80, 81 at the completion of a " normal weld '' is applied to the primary of a transformer 83, the secondary of which is connected to the anodes 85 of a pair of diodes 86 in a translating circuit F. The voltage drop is translated into a D.C. voltage difference which is applied across the resistor 98 to a D.C. amplifier which impresses a positive potential on the grid 102 of a control tube 103 in the circuit G, which tube strikes to lower the potential at the point 79 in circuit C, thereby to de-energize the tubes 24, 25 to effect the opening of the welding circuit. Variable resistors 39 and 78 in the heat energy control circuit D and the timer circuit E, respectively, may be gauged, so that the timer circuit may be adjustable proportionally to the adjustment of the heat energy circuit D. Specification 606,958 is referred to.
Patent GB-974043-A (GB)
Title: Explosives having an improved physiological acceptance and a low sensitivity to impact
IPC: C06B25/10
Filed: 1963-02-27
Abstract: A substantially oxygen-balanced explosive composition contains by weight 3-70% propylene glycol dinitrate and 10-95% of an oxidizing salt.  The propylene glycol dinitrate may also contain up to 50% nitroglycerine, up to 2% nitroglycol, and, as a gelatinizing agent, nitrocellulose or a hydrogen bond forming agent; such an agent may be an aliphatic alcohol or glycol, glycerol, an aliphatic ketone or camphor, an aliphatic acetate, formate, propionate, or nitrate ester, or an ether, many examples of such compounds being given. Examples of oxidizing salts are the nitrates, perchlorates, and chlorates of ammonium, alkali metals, and alkaline earth metals.  Other optional ingredients of the explosive compositions are T.N.T., P.E.T.N., hexogen, sawdust, flour, metal powder, and kieselguhr.  The composition may be in the form of a powder, or in plastic or semi-plastic condition.  In examples, the following ingredients are specified: 1,2-propylene glycol dinitrate, 1,3-propylene glycol dinitrate, nitroglycerine, nitrocellulose, ammonium nitrate, sodium nitrate, ammonium perchlorate, dinitrotoluene, monoacetin, T.N.T., sulphur,aluminium, wood flour, kieselguhr, paraffin wax and chalk. The explosives have an improved physiological acceptance and a lower sensitivity to impact as compared with corresponding compositions containing ethylene glycol dinitrate.
Patent GB-511711-A (GB)
Title: Improvements relating to kerbs for roadways
IPC: E01F9/053
Filed: 1938-03-14
Abstract: 511,711. Road-traffic signs. COWARD, R. H. March 14, 1938, No. 7894. [Class 3 (ii)] Kerbs are fitted with warning or safety devices comprising substantially mushroomshaped studs the heads of which are wholly or partly of rubber or similar flexible material. The underside of the head is concave to ensure peripheral contact with the kerb. The head may be moulded on a metal plate b, Fig. 2, carried by a metal stem a whose end is split, the stem being passed through a hole in the kerb f after which the split is clenched over a washer i in the manner of a split pin. The heads may be set at an angle to the stem, to facilitate the use of the studs on a sloping kerb face. In a modification, to avoid drilling or casting holes in the kerbstones, the stems of the studs may be clamped between adjacent ends of adjoining kerbstones, the gaps being filled in with grouting. The stud heads may have facets, and may be coated with luminous paint, or reflecting or iridescent material. The studs may be so positioned that the heads are directed upwardly. According to the Provisional Specification, the studs may be composed wholly of rubber, the stems being of tapering form to engage in undercut recesses in the kerb. The Provisional Specification states also that studs having metal stems may be secured by washers and nuts screwed on the ends of the stems.
Patent GB-1212386-A (GB)
Title: The co-polymerisation of conjugated dienes
IPC: C08F36/04
Filed: 1968-02-19
Abstract: 1,212,386. Conjugated diene-vinyl aromatic copolymers. MICHELIN & CIE (Compagnie Generale des Establissements Michelin). 19 Feb., 1968 [20 Feb., 1967], No. 8011/68. Heading C3P. Stereoblock copolymers in which one of the blocks has a statistical distribution of monomer units are obtained by copolymerizing a conjugated diene and a vinyl aromatic compound in solution in a hydrocarbon and using a catalyst comprising an organo-lithium compound in two stages, in the former optionally using an aprotic polar compound, and in the latter essentially using 0À5 to 2 moles of hexamethylphosphorotriamide per mole of organo-lithium compound. Specified aprotic polar compounds are hexamethylphosphoramide (used in amounts of less than 0À5 mole per mole of organolithium compound), dioxan tetrahydrofuran, other ethers, and a tertiary amine. The polymers have a higher 1,2- or 3,4-content in the statistical block. The process results in a polymer without terminal polyvinyl aromatic block(s). Further conjugated diene may be added between the two stages. Butadiene and styrene are the specified monomers.
Patent GB-977494-A (GB)
Title: Improvements in carbon black
IPC: C09C1/56
Filed: 1963-02-28
Abstract: A carbon black ink pigment may be prepared by contacting an ozone-containing gas stream with an oil furnace black which embodies the following characteristics within the indicated ranges: .E.M. surface area.120-150 m2 per gm .B.E.T. surface area.100-170 m2 per gm .Oil absorption.7-14 gal. per 100 lbs., the ratio of B.E.T. surface area to E.M. surface area of the black not exceeding 1.3 : 1, the furnace black so treated being in unpelleted form both before and throughout the entire ozonation, and the ratio of carbon black to ozone, by weight, not exceeding 25 : 1 and preferably above 10 : 1. The black used may have up to 10% by weight moisture content. The ozonation, which may be carried out at temperatures less than 300 DEG F., particularly 70-90 DEG  F., is advantageously effected with a dry-air ozone mixture containing not more than 6% by weight of ozone and preferably 0.4-3%. Two alternative means of ozonation are disclosed and exemplified.  In the first, continuous ozonation is effected by passing the black at a uniform rate through a slowly-rotating drum and passing an ozone-containing air stream through the drum in contact with the carbon black.  For example, using a drum 10 feet in diameter, 30 feet in length which rotates at 1-2 r.p.m. the contact time between the gas stream and carbon black was one hour.  Alternatively, the carbon black may be suspended in the gas stream prior to its introduction into the reaction vessel, e.g. two cyclone-type separators connected in series in which case the contact time is usually less than 1 minute. The product from either process, i.e. a carbon black characterized by a low structure, an E.M. surface area of from 120-150 m2 per gm., a B.E.T. surface area of from 100-170 m2 per gm., the ratio of the B.E.T. to E.M. surface area not exceeding 1.3 : 1, an oil absorption of 7-14 gallons per 100 lbs., and a volatile content in an amount of at least 2 x 10-4 grams of volatile matter per m2 of carbon black surface of which total at least 30% is carbon dioxide, is claimed per se. Specifications 715,713 and 763,159 are referred to.
Patent GB-1391575-A (GB)
Title: Medical injection apparatus
IPC: A61M5/145
Filed: 1973-02-19
Abstract: 1391575 Surgical syringes P MASSY 19 Feb 1973 [17 Feb 1972] 8128/73 Heading A5R [Also in Division Fl] A medical injection apparatus comprises a syringe 1g mounted on a frame, means for moving the piston 1t of the syringe 1g, a constant torque electric motor 15 having an excitation circuit to be supplied with a constant DC voltage and an armature circuit to be supplied so as to vary the speed of the motor 15 which is connected by transmission means 8-13 to the piston moving means, the transmission means 8-13 including a nut 8 and a threaded member 9 interengaged by ball bearings, and an electrical circuit 16 for controlling the motor 15 for operating the syringe 1g according to a predetermined program, the circuit 16 including switches for supplying the motor 15 with a constant DC excitation voltage and with an armature voltage dependent on means for regulating the motor speed, the motor 15 being provided with an electromagnetic brake. In a preferred embodiment two syringes 1g, (1d) Fig. 1, (not shown) are mounted on a box (2) and each syringe has its own transmission means. The circuit 16 includes timing devices which may provide a delay between the operation of the syringes 1g, (1d) and control the duration of an injection from 0.1 to 0.9 seconds or from 1 to 9 seconds. A resistor 2c is used to heat the syringes to body temperature before injection.
Patent GB-141493-A (GB)
Title: Improvement in wheels
IPC: B60C7/14
Filed: 1919-04-01
Abstract: 141,493. Newman, G. April 1, 1919. Spring wheels with continuous outer rigid rim and metal springs other than helical and volute springs, and rubber-ring cushions. - Relates to wheels in which an outer rigid rim carries cushion members co-operating with a corrugated surface on the inner portion of the wheel. The rim c carries a cushion member d corrugated on the inner surface and making partial contact with a corrugated ring c riveted at b to the inner portion a of the wheel. Flanges to take side pressure are bolted to bosses f. A driving-connexion is obtained by a bolt passing through a bush i.