baber/WOPTO huggingface dataset:
Patent GB-1277663-A (GB)
Title: Graft polymers
Inventor: KATAYAMA SHITOMI
IPC: C08F8/00
Filed: 1969-05-25
Abstract: 1277663 Reacting carboxylate polymers with ethylene oxide DENKI ONKYO CO Ltd 25 May 1969 [25 May 1968] 5407/72 Divided out of 1277662 Heading C3P Polymers having graft chains of ring-opened units of ethylene oxide are prepared by (i) forming a nitrogen base salt of a copolymer containing carboxylic acid groups and derived from ethylenically unsaturated monomers, and (ii) reacting the polymer salt so formed with ethylene oxide in the substantial absence of base. Preferred copolymers have the stoichiometric formula [M 1 ] m -[M 2 COOH] n , wherein M 1  is the residue of an ethylenically unsaturated monomer, e.g. acrylonitrile, methacrylonitrile, acrylamide, methacrylamide, styrene, vinyl acetate, vinylidene cyanide, butadiene, vinyl chloride, vinylidene chloride, methyl acrylate and methyl methacrylate; M 2 COOH is the residue of an ethylenically unsaturated acidic monomer, e.g. acrylic, methacrylic, crotonic, maleic, aconitic, itaconic, and α-oleostearic acids (or the corresponding anhydrides, acid chlorides or esters which yield the acids under the reaction conditions); m is the total number of units of the monomer M 1 , and n is the total number of units of M 2 COOH, wherein  being the mole fraction of the acidic monomer contained in the polymer. Preferred nitrogen bases are ammonia, alkyl or aromatic amines, the salt is formed in the absence of CO 2  or moisture, and the reaction with ethylene oxide is preferably carried out in an inert atmosphere at a temperature above the m.pt. of ethylene oxide and below 160‹ C., particularly 40-100‹ C. The resultant polymers may be either precipitated to form powder or made directly into film or thread. They are often colourless, and have good dyeability and resistance to electric charge and against scratching.
Patent GB-231642-A (GB)
Title: Improvements in and relating to synchronous electric machines
IPC: H02K19/14
Filed: 1924-03-03
Abstract: 231,642. Shenfer, C., and English Electric Co., Ltd. March 3, 1924. Alternating - cur - rent induction machines; exciting. - In an alternating - current machine having a polyphase winding and continuous-current excitation on one element and a single - phase winding on the other element, an electromotive force is impressed by external means upon the continuous-current circuit approximately equal and opposite to the electromotive force induced therein by the flux of the machine. As shown in Fig. 1, the three-phase primary winding 4 is on the stator and the single-phase short-circuited secondary winding 8 is on the rotor. The stator has also a continuous-current excitation winding 9 fed from an exciter 10 in series with the secondary winding 11 of a transformer. The primary winding 15 of the transformer is connected to an appropriate pair of the alternating-current mains and by a suitable choice of the number of turns of the transformer, the electromotive force impressed on the circuit may be made equal and opposite to that induced in the exciting winding 9. When starting the machine as a motor, the rotor runs up to a speed which is approximately one-half that which it would have if both rotor and stator were provided with threephase windings, and when the switch 13 is closed the machine pulls into step. In a modification, the stator polyphase winding'is connected in open delta, two of the phases being supplied with alternating current and the third phase being utilized as a continuous-current exciting winding.
Patent GB-111043-A (GB)
Title: Pistons for Internal Combustion Engines.
Inventor: CROSSLEY KENNETH IRWIN
IPC: F02F3/00
Filed: 1917-04-18
Abstract: 111,043. Crossley, Sir K. I., and Webb, W. Le P. April 18, 1917. Pistons.-Relates to pistons for internal-com bustion engines of the type having an upper smaller motor part and a lower larger pump part and consists in making such pistons in two or more parts fitted together so as to be co-axial and in arranging the bolts or other fastenings so that they are not subjected to the hot gases. The parts can be made of different materals such as cast iron and aluminium. In the construction shown in Fig. 1, the motor piston B and the trunk A are made in one piece bolted to the pump piston F. and in the construction shown in Fig. 2, the pump piston and the trunk A are made in one piece. Fig. 3 shows a construction in which the motor piston, the trunk, and the pump piston are separate parts. In the constructions shown, the gudgeon pin is carried by the trunk, but this arrangement is not essential.
Patent GB-1130986-A (GB)
Title: An improved electrical measuring transducer
IPC: G01R1/28
Filed: 1967-02-06
Abstract: 1,130,986. Calibrating transducer and measuring systems. HARTMANN & BRAUN A. G. Feb. 6,1967 [April 9,1966], No. 5518/67. Headings G1N and G1U.  A network for measuring a signal voltage indicative of e. g. the concentration of a particular gas in a gas mixture, includes automatic calibration facilities, controlled by a timing device, to check the network for two reference gas mixtures with known high and low concentrations of the test gas. The input signal voltage from the gas analyser (not shown) at terminals 2, 3, biased by an adjustable opposing voltage from potentiometer 15, is fed into an amplifier 1 with negative feedback adjustable by potentiometer 21, to develop an output voltage across resistor 12. The network also includes a D.C. bridge 10 with potentiometer 11 as one branch, the bridge unbalance being amplified at 8 to produce the output current J of the network. Current J is compared at 22 with the voltage across resistor 12 and any difference is fed through switch contacts b 1 , b 2  and switching unit 6 to servomotor 23 to adjust potentiometer 11 accordingly, whereby current J is made proportional to the input signal at terminals 2, 3. To check the network at the minimum concentration, the gas analyser is switched over to the first reference gas mixture, switch contacts bi, b 2  are opened and contacts n 1 , n 2  closed. Amplifier 1 is fed at 2, 3 with a test signal due to the reference gas, and the standard opposing voltage from potentiometer 15 to develop across resistor 12 a voltage which should be equal to a calibrating voltage obtained from preset potentiometer 13. If the algebraic sum of these voltages is not zero, the difference actuates switch circuit 6 and is fed to a servomotor 14 which adjusts potentiometer 15 accordingly. Similarly, to check the network at the maximum concentration, the second reference gas is fed to the analyser, switches n 1 , n 2  are opened and switches e 1 , e 2  closed. The calibrating voltage is now derived from preset potentiometer 19, and any difference causes servomotor 18 to adjust feedback resistor 21. The system retains an output current J corresponding to the last measured gas concentration during the recalibration process.
Patent GB-1104129-A (GB)
Title: Improvements relating to synthetic rubber compositions
IPC: H01B3/44
Filed: 1967-02-06
Abstract: A composition suitable for insulating cables comprises butyl rubber and 70 to 150% by weight of the butyl rubber of finely divided calcium carbonate whose surface has been coated with a hydrophobic fatty acid or a salt of such an acid.
Patent GB-487523-A (GB)
Title: Improvements relating to valve mechanisms for controlling fluid operated machine tools
IPC: B24B47/06
Filed: 1937-02-25
Abstract: 487,523. Fluid-operated machine tools. GEAR GRINDING CO., Ltd., and ORCUTT, A. H. Feb. 25, 1937, No. 5654. [Class 69 (ii).] Valve mechanism for controlling fluidoperated machine tools, such as metal grinding or cutting machines, comprises a distributing valve which is fluid-actuated under the control of a pilot valve operated by striking pieces on the moving machine part, and a further valve which controls the supply pressure fluid and also controls the return of exhaust liquid from the distributing valve to the reservoir ; the valves are all of the oscillatory type and are contained in a hollow valve housing. With the parts in the positions shown, pressure fluid supplied, either directly or through a pressure chamber, by a pump enters at o and passes through axial paesage r and radial passage s in the valve f to a passage u in the valve housing e, and thence through axial bore 24, and radial passage 26 in the valve h, and passages 31, 32, 33 to a cylinder enclosing one end of a plunger 4 which is thus moved to set the distributing valve g, fluid passing from a cylinder enclosing the other end of the plunger through passages 30, 29, 27 and 36 to a reservoir w having a return pipe x leading to a sump. Fluid passes from the supply passage u through axial bore 9, and radial passage 11 in the valve g, passages 15, 16 and pipe 14 to one end of the cylinder a so as to move therein the piston b, fluid expelled from the other end of the cylinder passing by pipe 14, passages 13 and 12 and valve g to a passage z and thence through the part y of the valve f and port 38 to the reservoir w. At the end of the stroke, the valve h is rotated by the tappets on the machine part so as to cause the valve g to be rotated. To stop the machine, the valve f is rotated by hand ; the supply to the passage u is interrupted, the pressure fluid from o passing through port v to the reservoir ; at the same time, the part y of the valve f interrupts communication between the return passage z leading from the distributing valve g and the port 38 communicating with the reservoir.
Patent GB-1061733-A (GB)
Title: A flying body
IPC: B64D27/00
Filed: 1964-02-11
Abstract: 1,061,733. Propelling aircraft. H.-W. VON ENGEL. Feb. 11, 1964 [Feb. 15, 1963], No. 5669/64. Headings B7G and B7W. [Also in Division F3] Propulsive and manoeuvring forces on a flying body are produced by the emission of charged particles, as at 4, e.g. by electrically charged jet propulsion gases or #-radiation, the flying body thus becoming charged and influenced by natural or artificial electrostatic fields. Emitters of charged particles may be mounted on the body so that the direction of emission is variable. The body may be cylindrical, lenticular, annular, or composed of two truncated cones placed base to base. Two lenticular bodies may be superimposed and joined by a waisted section. The body may have a circular wing, or two such wings superimposed.
Patent GB-1050388-A (GB)
IPC: C03B29/12
Filed: 1965-02-09
Abstract: 1,050,388. Supporting heated glass sheets. GLAVERBEL. Feb. 9, 1965 [March 6, 1964], No. 5674/65. Heading C1M. In a method wherein a glass sheet is treated at an elevated temperature the glass sheet is wholly or partially located in an elevated temperature zone and supported in a substantially horizontal position wholly or mainly by a gas which is forced upwardly as spinning streams distributed over said zone so that the gas streams commingle and maintain a cushion of gas over the whole or substantially the whole of said zone. A glass sheet 29 (Fig. 1) is fed by rollers 71 from a pre-heat section to the elevated temperature zone above a frame 1. A series of equi-sized circular sleeves 4 each containing a twin-bladed air-screw 5, 6 are housed in the frame 1, the lower ends of the sleeves opening into a communal chamber into which ambient air is drawn. The screws 5, 6 are driven synchronously and the streams formed thereby may have mixed in them either a hot gas or combustible products from burners 27 so as to control the temperature of the support cushion. The sheet 29 is moved by edge contact with conveyer belts 9 and 12, the latter being adjustable for various sheet widths. The gases are recycled by exhausting between the sleeves 4. Different sleeve and screw arrangements are given in Figs. 4-6 (not shown). In an altemative embodiment, Fig. 7, the sheet moves between upper and lower air beds divided by boxes 30, 31 into two zones, A for heating and B for cooling. To aid the movement of the sheet, thus making the process continuous, louvres 32 are provided on the lower air bed. The method may be used for tempering, bending or enamelling.
Patent GB-621459-A (GB)
Title: Improvements in or relating to electric plug and socket couplings
IPC: H01R13/646
Filed: 1947-02-28
Abstract: 621,459. Two-part couplings. BUTLER, T. A., and PYE, Ltd. Feb. 28, 1947, No. 5785. [Class 38 (i)] A pre-moulded, plug-and-socket connector adapted for attachment to small-diameter coaxial cables, comprises outer metal shell contacts 5, 5a, Figs. 4 and 2 respectively, within which central contacts 6 carrying at their outer ends either a resilient socket 11 or a pin 11a, are secured by insulating material 8 moulded inside the shells and round an intermediate portion of the outside thereof, a space 22 being left between the pin 11a and the shell 5a for insertion therein of the shell 5. Apertures 9 are provided in the shells to allow the insulating material to flow to the inside thereof, and screws 15 pass through one of said apertures in each of the shells and into the contacts 6 for securing the inner conductor 1 of a coaxial cable in the bores 14 thereof. The rear end of each shell has a projection 7 which is forced between the dielectric 3 and outer conductor 2 of the cable, a split clamping sleeve 16 being fitted over the outer sheath 4 of the cable to clamp it and the conductor 2 to the shell. Specification 588,110 is referred to.
Patent GB-796113-A (GB)
Title: Rubber tire
Inventor: JOHNSON WALLACE JOHN STOCKMAN
IPC: B60C7/12
Filed: 1956-02-24
Abstract: 796,113. Cushion tyres. UP-RIGHT, Inc. Feb. 24, 1956, No. 5840/56. Class 144 (2). A cushion tyre 11 comprises two spaced concentric rings 13, 15, at least the outer ring 15 of which is of deformable resilient rubber-like material, connected together by a plurality of equi-spaced radial rubber-like spokes 17, each of radial length at least three times the minimum circumferential width, the spokes each having a straight and a concave transverse face and being disposed with the concave faces in the same circumferential direction so that the buckling of the spokes under radial load occurs always in a predetermined direction. As shown, the inner ring 13 is of rubber-like material and is mounted on a rigid wheel hub or disc 9.
Patent GB-183504-A (GB)
Title: Improvements in or relating to the concentration of coal
IPC: B03D1/02
Filed: 1921-02-22
Abstract: 183,504. Jones, F. B., and Minerals Separation, Ltd. Feb. 22, 1921. Flotation processes.-A process of separating coal particles of linear dimensions between 0.1 and 0.5 inch from shale or other gangue consists in submitting crude crushed or screened coal to treatment to coat the coal particles with a film of oil, and submitting the treated material to concentration by film flotation or sub-aeration flotation. The oiling may be effected by agitating a pulp of coal and water with an oil such as paraffin oil or fuel oil, or by immersing the coal in such an oil and then draining it. The coal may be first screened to separate out the particles of the size referred to, or the. whole of the crushed coal may be treated together. In some cases, a frothing- agent such as cresol may be added. Specifications 18660/04, 25204/04, 25204A/04, 25858/04, 29374/04, 10929/10, 23949/10, 21650/13, 10312,/14, 122,454, and 159,285 are referred to.
Patent GB-1380808-A (GB)
Title: Photographic dry copying process
IPC: G03C5/56
Filed: 1972-02-09
Abstract: 1380808 Cyanine dyes AGFA-GEVAERT AG 9 Feb 1972 [11 Feb 1971] 5968/72 Heading C4P [Also in Division G2] Dye of formula  is prepared by mixing 2-(carboxymethoxy)- cinnamaldehyde and cyclohexanone in alkaline solution and then acidifying. Dye of formula is prepared by heating on a steam bath an alcoholic solution of 1,3-diethyl barbituric acid and 4-(dimethylamino)cinnamaldehyde. Dye of formula is prepared by refluxing 1,3-diethylbarbituric acid and 3,5-diiodo-4-hydroxy-benzaldehyde in glacial acetic acid/pyridine mixture. Dye of formula is prepared by heating on a steam bath 3,5- diiodo-4-hydroxy-benzaldehyde and 2-methyl- 3-ethyl benzoselenazole tosylate in an alcohol solution containing triethylamine. Reference has been directed by the Comptroller to Specification 1,296,294.
Patent GB-1463465-A (GB)
Title: Method and apparatus for forming a surface contour on a   transducer head
IPC: B24B49/00
Filed: 1975-02-12
Abstract: 1463465 Grinding INTERNATIONAL BUSINESS MACHINES CORP 12 Feb 1975 [11 March 1974 (2)] 5993/75 Heading B3D [Also in Division G5] A method of forming a surface contour 22 on a transducer head 10 comprises rotating the head about an axis 36 through the surface, causing relative movement between the head and a material removing device, such as a grinding wheel 300, lapping tape, abrasive blasting device or other abrasive removal means, towards one another along the axis, sensing the electrical resistance of the head, generating a stop signal when the sensed resistance equals or exceeds a predetermined resistance, and terminating relative movement after the occurrence of the signal. The transducer consists of a cylindrical magnetic head having two semi-cylindrical sections 11, 12 of non-magnetic, relatively non-conductive material, such as plastics. or of ferrite, between which are a layer 13 of high conductivity material, such as gold, and a layer of conductive material, such as copper. The layers are shaped to have an outer U-shaped section ending at points 16, 18, and an inner U-shaped section, which includes a magnetoresistive element 15, or is completely magnetoresistive or may be a single turn purely conductive element, ending at points 16, 17. Points 16, 17 are connected to leads 19, 20 and points 17, 18 are interconnected. During forming of the surface contour 22, the end surfaces 21 of the sections 11, 12 are abraded away and the middle segment of the outer U-shaped section is ruptured. The surface 22 may be part-spherical, conical or flat. In apparatus for carrying out the method, the transducer 10 is mounted in a collet 301 carried by a drive shaft 305 which is supported by bearings in a support 350 and driven by a belt 307 from a motor 310. The support 350 is mounted on a base member 312 which, with the motors 310, is carried by a plate 313 vertically movable along guides 317, 318 by an hydraulic actuator 315. The leads 19, 20 from the transducer 10 are connected by leads 302 to slip rings 23, 24 which are mounted in an armature secured to shaft 305 and are engaged by brushes 25 of a control circuit mounted on the support 350. The resistance of the transducer is connected by the brushes to a bridge circuit, the output of which is modified in a logic circuit and compared at every third revolution of the shaft 305, as determined by a cam 32 on the shaft operating a switch 33 and the logic circuit, with a preset value to control the feed of the grinding wheel into the transducer. When the value is equal or greater than the preset value, the down feed of the grinding wheel is terminated and reversed.
Patent GB-416898-A (GB)
Title: Fret-saw frame
IPC: B23D51/14
Filed: 1934-02-23
Abstract: 416,898. Saws. TIGGES, (nee HERRMANN), H., 1, Gartenstrasse, Langenberg, Rhineland, Germany. Feb. 23, 1934, No. 6004. [Class 61 (ii).] A tubular fret-saw frame a has a rounded bend connecting the limbs and each end is flattened to form one of the blade clamping jaws, the other jaw c at the handle end or c<2> at the other end being formed of a plate with a stub end engaging a hole b in the tube, jaw c being slotted at e to engage the clamp bolt f so that it can be pulled out to disengage the stub end from hole b enabling handle g to be folded inwards and jaw c<2> carrying a rubber buffer h adapted to rest on the bench edge without slipping whilst turning the clamping nuts. Instead of employing a separate clamping plate the ends of the tubular frame a may be slotted and flattened to form clamping jaws c<3>, c<4>, Fig. 7. In another modification, Fig. 10, the separate clamping plate c<4> coacting with the flattened end of the tubular frame a is slotted at the end to engage with a headed stud l, this form of clamping member being applicable to a frame formed from metal strip, Fig. 13. In another modification, Fig. 15, the slotted blade clamps q, rare slidable and rotatable in the frame heads m, n and held in angularly adjusted position by teeth s, the lower clamp being pulled down by a spring ; the shank o of the clamp m is secured in the end of the frame by a pin p with the handle g either in the position shown or extending inwards.
Patent GB-660386-A (GB)
Title: An improved centrifugal moulding machine
IPC: B28B1/20
Filed: 1949-03-05
Abstract: 660,386. Centrifugal moulding of tiles &c. RAFFERTY, G. H. March 5, 1949 [March 12, 1948], No. 6067/49. Class 87(ii) A centrifugal moulding machine for roofing tiles, slabs &c. of cementitious material, comprises a cylindrical drum 10, means for rotating the drum about its horizontal axis, a cylindrical feeding chamber 20 open at one end fixed co-axially within the drum to rotate with it; removable moulds 23 positioned radially between the feeding chamber and the periphery 12 of the drums, each of the moulds having an opening at its inner end into the feeding drum; means on the feeding chamber and the drum to maintain the moulds in alignment and apertures in the feeding chamber communicating with the openings in the inner ends of the moulds. The back of the drum 10 is secured to one end of a shaft flexibly coupled to a motor. The feeding chamber 20, provided at its open end with a rim 22, is welded to the back plate of the drum and connected to the periphery of the drum by spokes 21. Between each successive pair of spokes are two open-ended moulds 23 each consisting of front and back plates 24, 25. The moulds are positioned at their ends between parallel locating members 29 some of which are provided with spring loaded pressure plates 31. The outer ends are located between webbed angle-irons 32, 34 and webbed channel members 35. The backs of the moulds abut at the top against stops 40 welded to the back plate of the drum and at the bottom against plates 38 also welded to the back plate of the drum. The open inner end of each mould communicates with a corresponding feed slot in the feeding chamber whilst the lower end is closed by a rubber-faced wedge member 26 driven between the mould and an abutment plate 36. The outer ends of the feed slots (not shown) are bevelled so that when the moulds are withdrawn the material near the inner ends is neatly screeded.
Patent GB-384296-A (GB)
Title: Improvements in and relating to systems of electric power transmission
IPC: H02M7/51
Filed: 1931-02-26
Abstract: 384,296. Converting'. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Maser, H. T. ; 7, Front Street, Schenectady, New York, U.S.A.) Feb. 26, 1931, No. 6093. Convention date, Feb. 28, 1930. Void [Published under Sect. 91 of the Acts]. [Class 38 (ii).] In means for interchanging power between an A.C. circuit 10 and a D.C. circuit 11 through a transformer 12 and a pair of electric discharge devices 13, 14 in which control is effected by grids 15, 20, provision is made for varying both the phase and magnitude of the grid potentials during one part of the operating range and substantially the magnitude only during the remainder of the operating range. This provision consists in supplying the grid transformer 18 through a pair of variable resistances 29, 30 which enable the phase angle of the grid potentials with respect to the anode potentials to be altered (simultaneously with the magnitude) from 180-90‹ after which further increases in resistance merely decrease the magnitude of the grid potentials without causing appreciable phase change.