baber/WOPTO huggingface dataset:
Patent GB-1362233-A (GB)
Title: Method of filtering light and apparatus therefor
IPC: G02F1/11
Filed: 1971-06-18
Abstract: 1362233 Testing optical elements HEWLETT-PACKARD CO 18 June 1971 [18 June 1970] 28711/71 Heading G1A [Also in Divisions H3-5] Plane polarized polychromatic light from a source 2, 3 is passed collinearly with an acoustic wave S 2  from a transducer 12 through a birefringent crystal 5, c 8 , LiNbO 3 , PbMoO 4  or quartz, and subsequently analyzed by a Rochon prism 9 so that light 16 within a narrow band about a frequency f o  = #, where c is the speed of light in vacuo, f a  and V are the acoustic frequency and velocity in the crystal and # n  is the birefringence of crystal 5, (k-vector matching), is cumulatively diffracted into the orthogonal polarization plane and rejected from the main beam by prism 9. The intensity of beam 16 is sensed by a thermopile 19, the output being compared 21 with a reference voltage 22 and used to control the amplification 14 of signals from a voltage controlled oscillator VCO 13 energizing the transducer 12 to maintain the rejected beam intensity constant (the amount of diffraction being a function of acoustic amplitude and frequency). The frequency of the rejected beam 16 may be swept by controlling the voltage supplied to VCO 13 in a similar manner. As shown the frequency of VCO 13 is converted at 23 to a voltage which is compared at 24, 31 with reference "start" and "stop" voltages 25, 32. When VCO 13 is at the "start" frequency, the zero output 24 is detected at 28, closing switch 29 and opening switch 26 e.g. via a relay. The output of 31 then turns VCO 13 until the "stop" frequency is reached whereupon null detector 33 senses the zero output of 31, closing switch 26 and opening switch 29 for a reversal of events. If it is desired to keep the frequency of VCO 13 constant, a switch 27 is opened and the reference voltage 25 suitably adjusted. The notch filtered main beam 15 is useful for testing devices for non-linear optical transmission, and for testing multi-channel optical devices for crosstalk. As shown, beam 15 is passed through an optical channel of a device 34 to a spectrum analyzer 35 wherein optical frequencies within the reject band are analyzed to determine the extent to which there is coupling if light from adjacent frequencies into the band pass frequency of the channel under test.
Patent GB-876091-A (GB)
Title: Improvements in or relating to the protective treatment of graphite
Inventor: GLINN TERENCE GLANVILLE JAMES
IPC: C01B31/00
Filed: 1957-09-12
Abstract: Graphite is impregnated, preferably under reduced pressure, with a solution of phosphorus pentoxide in a volatile organic solvent, e.g. methanol, and heated, e.g. to a temperature of 500 DEG C., to evaporate the solvent and cause chemisorption of the phosphorus pentoxide.  The graphite may be in massive or powder form. 0.05-0.5% phosphorus pentoxide may be absorbed.  The impregnating solution may also contain tetra ethyl silicate. Specification 850,016 is referred to.
Patent GB-1514271-A (GB)
Title: Process for preparation of cationic resin aqueous emulsions
IPC: C08G18/08
Filed: 1975-07-09
Abstract: 1514271 Aqueous cationic polyurethane emulsions KAO SOAP CO Ltd 9 July 1975 [18 July 1974] 28875/75 Heading C3R An aqueous cationic polyurethane emulsion is made by (a) reacting (A) an -NCO-terminated urethane prepolymer with excess of (B) a polyalkylene polyamine to form (C) a polyurethane-urea-polyamine, and (b) reacting part of the amino groups with # 1 compound(s) (D) being (D1) a C12-22-alkyl isocyanate, (D2) a C12-22 alpha-olefin epoxide, or (D3) a C13-22-acyl chloride, to form (E) an alkyl-substituted polyurethane-urea-polyamine, and (c) adding to (E) an aqueous solution of an acid (F) to form an emulsion of pH 5-7, thereby converting the remaining amine groups to cations; and optionally (d) removing the organic solvent. (A) is formed from an organic polyol of m.w. 200-10,000 and excess polyisocyanate; (B) is where n > 1 and the R<1> are independently H or C1-4 alkyl or hydroxyalkyl; and where B is the number of moles of amino groups in (B) and A is the number of moles of NCO groups in (A), then 1<B/A#5; step (a) is performed step (a) may be performed in liquid phase in ketone solvent at - 20 to + 70 C., until-NCO groups can no longer be detected; and in step (b) there may be 10-80% moles (D) based on moles amino groups in (C). (B) may include diamines, or adducts of diamines with alkylene oxide, alkylene oxide, acrylonitrile, or acrylate. Between steps (b) and (c), (E) may be reacted at 40-70 C. with epichlorohydrin or epibromohydrin in an amount equimolar to the primary and secondary amino groups in (E). (F) may be HCl, HNO3, or acetic, propionic, monochloroacetic, or glycolic acid, (b) may be performed at 10-70 C. The emulsion may be used for impregnating or coating polyester or acrylic jersey fabric, non-woven fabrics, paper, leather, rubber articles, wood, glass, or plastics. Specification 1,337,518 is referred to.
Patent GB-777813-A (GB)
Title: New barbituric acid derivatives, and processes for making the same
Filed: 1954-10-07
Abstract: The invention comprises barbituric acid derivatives of the formula <FORM:0777813/IV(b)/1> in which R1 is a radical of the formula <FORM:0777813/IV(b)/2> (where Y is hydrogen, halogen or an alkyl radical and n is an integer from 0 to 3), R2 is the same as R1 or is hydrogen or an alkyl, unsaturated alkyl, aryl or aralkyl radical, which may be unsubstituted or halogen substituted, R3 is hydrogen, alkyl, aralkyl or acyl, and X is sulphur, oxygen or an imino group. Preferably R2 is an alkyl radical of 1-5 carbon atoms and R3 is hydrogen or an aryl, alkyl, aralkyl or acyl group or an alkyl group of 1-5 carbon atoms.  The compounds are made by reacting an ester of the formula <FORM:0777813/IV(b)/3> wherein R4 and R5 are alkyl radicals, with a compound of the formula H2N-CX-NHR2 or Acyl NH-CX-NHR3 or NC-HN-CX-NHR3 in the presence of an alkaline condensing agent, such as an alkali metal, alkali metal alcoholate, alkali metal amide, alkali metal hydroxide, alkali metal hydride or organoalkali metal compound.  The reaction is suitably carried out at 80-140 DEG C. in an organic solvent such as methanol, ethanol, propanol, butanol, benzene, toluene or xylene. Products wherein wherein X is an imino group = NH may be converted into the corresponding oxygen-containing barbituric acid derivatives by hydrolysis, preferably in acid solution. Products wherein R2 or R3 is hydrogen may be treated to replace the hydrogen atom by any of the other substituents which may be represented by R2 and R3.  Halogen atoms may be introduced into the substituents R1 and/or R2 before or after condensation to form the barbituric derivatives. When the condensation is carried out using N-acyl derivatives of urea, thiourea or guanidine, the acyl group is hydrolytically split off during the condensation.  Preferred products are 5-ethyl- and 5 - allyl - 5 - (2 : 5 - endomethylene - D 3 - tetrahydrophenylmethyl) - barbituric acid, 5-ethyl- and 5-allyl-5-(2 : 5-endomethylene- D 3-tetrahydrophenyl) - barbituric acid; 5 - allyl - 5 - (2 : 5 - endomethylene - D 3 - tetrahydrophenylmethyl) - thiobarbituric acid; 5 - allyl - 5 - (2 : 5-endomethylene - D 3 - tetrahydrophenyl) thiobarbituric acid and 5 - methyl - 5 - (2 : 5 - endomethylene - D 3 - tetrahydrophenyl) - N - methyl barbituric acid. Examples are given. Specification 777,814 is referred to.
Patent GB-265701-A (GB)
Title: Improvements in or relating to motor propelled road vehicles
IPC: B62D55/02
Filed: 1925-11-17
Abstract: 265,701. Dawson, Sir A. T., and Buckham, Sir G. T. Nov. 17, 1925. Endless-track vehicles.-In a motor vehicle of the kind having endless-tracks and road wheels for alternative use, the conversion from an endless-track vehicle to a wheeled vehicle is effected by power-operated means which are automatically disconnected or stopped at the end of the operation. In the construction shown a lever F raising and lowering the endless-tracks is driven by an internal-combustion engine, the magneto of which is earthed to stop the engine by means of a switch arm F<1>. At either end of its travel the switch arm engages one of the contacts F<3>, F<4> and completes an earthing circuit for the magneto G<2> through a hand-operated double switch G. In the position shown the magneto is earthed through the right-hand. blade of the switch G and the contact F<3>, and the engine can only be re-started if the switch G is moved to the position shown in broken lines, this being done after the raising and lowering mechanism has been disconnected from the engine. In a modification where the raising and lowering mechanism is driven through reversing gear the latter is automatically returned to the neutral position at the end of the operation by a pin on a. moving part travelling in a slot in a link connected to the reversing-gear lever. Specification 265,670 and 265,628 are referred to.
Patent GB-913036-A (GB)
Title: Helicopter undercarriage
IPC: B64C25/52
Filed: 1961-08-14
Abstract: 913,036. Helicopter undercarriages. DORNIER-WERKE G.m.b.H. Aug. 14, 1961 [Sept. 16, 1960], No. 29256/61. Class 4. A helicopter undercarriage comprises skids mounted on the fuselage by struts made of a material which is highly elastic, and breaks without first undergoing plastic deformation, e.g. a glass fibre reinforced plastics material. In the plan view of Fig. 2, a forwardly and downwardly extending strut 6, and two downwardly rearwardly and laterally extending struts 7, terminate in integral ground contacting skid portions. Alternatively, the skids may be separate readily replaceable units of the same or different material, and may be reinforced by sheet steel. The struts may be clamped to the fuselage so as to be readily replaceable. On touch-down, the struts provide shockabsorption by elastic deformation, the skids sliding outwardly. Too severe an impact results in fracture of the struts, but not permanent deformation. Strut 6 supports your control pedals 8 for the occupant of seat 9. There may be two struts in front of, and one behind, the centre of gravity of the helicopter.
Patent GB-522467-A (GB)
Title: Improvements in electric selector switches
IPC: H01H67/06
Filed: 1938-10-10
Abstract: 522,467. Automatic exchange switches. STANDARD TELEPHONES & CABLES, Ltd., GRACE, B. B., and SMITH, C. P. Oct. 10, 1938, Nos. 29303 and 37037. '[Class 40 (iv)] The terminals 51, Fig. 16, of a selector are formed like relay springs and are operated in turn by helically arranged pins on a drum mounted on the shaft of an electric motor. The terminals which have noble metal points are carried by a frame unit 42 which is provided with end plates 45, Fig. 14, united by a Y-section web 43. The fixed feed contacts are provided by bars 60, Fig. 17, with noble metal insertions supported by end plates 45 by engagement of slots in plates 63 secured to the bars with studs 48 on the outer sides of the plates 45. The selecting unit comprises a studded drum 3 provided with ball bearings 6 and connected to the magnetic disc rotor 9 of a motor which comprises also a driving magnet having pole pieces as shown in Fig. 10, self-interrupting contacts 16 controlled by a notched disc 10 and a latch magnet 23 the armature of which has a resilient hook shaped member 21 ahead of or behind the stopping member 20 to facilitate the stopping action. The latch magnet may also control contacts 24, Fig. 20, in the driving circuit. It is adjustably mounted by means of a slotted and curved mounting plate 37. There may be more than one driving magnet and the pole elements may be arranged axially instead of radially as shown. The switch shaft carries a numbered wheel 8 which co-operates with a viewing aperture formed by the driving magnet and the frame. The two units are secured together by a single screw 120, Fig. 19, with the aid of a spring latch 404 and spherical locating studs 47 and grooves 403 on the bank unit which engage respectively recesses at right angles to, each other and ribs 109 on the selecting unit. Each unit has a dust cover member (not shown) so that the switch is completely enclosed when assembled. The selector portion of 'the cover has a transparent window. Several switch units may be associated, Figs. 21, 23 (not shown), e.g. to form a large capacity hunting, switch, the units being arranged to operate in succession, or each of a number of hunting units may lead in a different direction, a particular unit being selected by a further unit which is set numerically.
Patent GB-207542-A (GB)
Title: An improved process for extracting oil from oleaginous grains and other bodies by solvents
IPC: C11B1/10
Filed: 1923-11-22
Abstract: Oil is extracted from oil-cakes or other oleaginous bodies by acetone or other solvent soluble in water.  The extract is freed from acetone by washing with water and then with a solution of sodium bisulphite. Residual solvent is removed from the grains either by washing with water or by heating to 60 DEG -70 DEG  C.
Patent GB-280896-A (GB)
IPC: H01F41/06
Filed: 1927-11-04
Abstract: 280,896. British Thomson-Houston Co., Ltd., (Assignees of Steele, R.). Nov. 20, 1926, [Convention date]. Creel arrangements.-A device for braking the supply spool 11, from which wire is wound on to a spool 12, and for compensating for variations in tension in the wire 10, comprises a flexible brake arm 16, fixed at 17, having a curved braking portion 20 and a leather or like brake-band 15, means being provided to alter the curvature of the arm 16 in accordance with the tension in the wire to vary the braking force. The wire 10 passes over a guide-wheel 25 on a vertical arm 23, the brake-arm 16 being under the control of springs 22, 26 arranged as shown. An increase in tension in the wire 10 will move the arm 23 to the left and thereby will raise the end of the arm 16 to open the curvature of the part 20 and decrease the braking effect. The sensitivity of the device may be adjusted by tensioning the spring 26 and adjusting the spring 22 vertically on the arms 21, 23.
Patent GB-789540-A (GB)
Title: Improvements in or relating to means for supporting shifting boards or centre line grain divisions in ships' holds
Inventor: MAY ERNEST CYRIL
IPC: B63B25/24
Filed: 1954-10-14
Abstract: 789,540. Cargo boards. M.E.P. CO., Ltd. Jan. 12, 1956 [Oct. 14, 1954], No. 29589/54. Class 113. In a ship's hold a member 10 for carrying shifting boards 24 is substantially less in length than the depth of the hold and is suspended from a hatch beam 23 or when detachably suspended may be'secured to the hold floor or tank tops so as to project up therefrom. The member 10 comprises an I-section joist to which bars 11 are welded forming channels 12 extending the full length of the member. One end of the member is provided with lugs 14 for the attachment of stay wires 16 whilts at the other end are welded brackets 17 having a flange 20 and a flange 19 with holes 22 therein. With a full bulk cargo the members 10 are suspended from the beams 23 by bolts passed through the holes 22 in the brackets to registering holes in the beams, the boards 24 being supported in the channels 12 by stops which are bolted in the lower end of the channels. When a part bulk cargo is carried the members are inverted and the brackets bolted to the tank tops, said stops being removed so that the shifting boards 24 can be slid down into position. Specification 742,392 is referred to.
Patent GB-226356-A (GB)
Title: Improvements in or relating to display devices
IPC: G09F7/12
Filed: 1923-11-23
Abstract: 226,356. Gee, J. E., and Gee, F. S. Nov. 23, 1923. Signs, supporting.-Letters, numerals, &c. are detachably fixed to a support such as a window solely by suction cups attached to the letters &c. either integrally or by fastenings. The cups a are arranged entirely within the margins of the letter &c., and form feet so that the letter stands away from the background. The letters &c. may be of rubber which may be strengthened with a facing of metal &c., and may have integral cups or rubber cups with stems vulcanized into holes in the letters, the holes being preferably undercut or irregularly shaped. Cups may be attached to letters of hard material by passing them into holes in the letter, or by screwing or rivetting them in place. When the cups are on the front of the letter they are spaced equally apart and' may be coloured to match or contrast with the letter.
Patent GB-1396729-A (GB)
Title: Water dispersible proteins
IPC: A23G1/00
Filed: 1972-06-23
Abstract: 1396729 Protein products A SCHAPIRO 23 June 1972 [23 June 1971] 29611/72 Addition to 1293476 Headings A2B and A2E [Also in Division C3] A water-dispersible protein product comprising not less than 90% by weight of an edible, water-insoluble or difficultly dispersible protein, the protein being in the form of particles uniformly coated with a non-toxic, oil-soluble, surface-active agent, is produced by (i) preparing a concentrate comprising a uniform blend of a substrate which is an acceptable food ingredient and the surface-active agent, (ii) adding to the concentrate an increment of the protein which is a small fraction of the weight of the desired protein product, to produce a uniform blend of protein increment, substrate and surface-active agent, and (iii) adding the remainder of the protein and blending to produce the protein product containing at least 90% by weight of protein. Many surface-active agents are particularly mentioned. The protein product may in turn be mixed with a water-insoluble or difficultly soluble food product to enhance the dispersibility of the latter in water or aqueous medium. Examples 1 to 5 describe blending soyabean protein incrementally with a small quantity of the protein or with baker's sugar or non-fat milk solids (35% casein, 65% lactose) that had in each case been uniformly coated by mulling with soya bean lecithin as surface-active agent. According to further Examples, the instantized protein product is mixed with (6, 8, 9 and 10) cocoa, sugar and, optionally, non-fat milk solids, (7) sodium caseinate with or without sugar, and (11) meat flavour. The protein product may be mixed with the sugar product described and claimed in Specification 1293476.
Patent GB-827506-A (GB)
Title: Radio-frequency transformers
Inventor: MADDOX MICHAEL MORTIMER
IPC: H01F17/00
Filed: 1956-09-28
Abstract: 827,506. Transformers. LONDON, PRINCIPAL SECRETARY OF STATE FOR FOREIGN AFFAIRS OF. Sept. 27, 1957 [Sept. 28, 1956], No. 29631/56. Class 38 (2). A radio frequency transformer comprises a primary winding P formed from a copper tape 2 attached to a polystryrene tape 8 by transparent adhesive tape 10 wound on to the centre rod 6 of Ferroxcube pot core assembly and a secondary winding S wound as a helical winding coaxial with winding S and insulated therefrom by part of the tape 8. An electrostatic earthed screen 14 may be interposed between the two windings, or the outer turn of the primary winding may be earthed. The windings are surrounded by the pot-type core which may be potted in resin or contained in moulded polythene.
Patent GB-581160-A (GB)
Title: Improvements in and relating to electrical range finders
IPC: G01S1/02
Filed: 1939-11-08
Abstract: 581,160. Radiolocation. NASH & THOMPSON, Ltd., NASH, A. G. FRAZER-, and WHITAKER, A. Nov. 8, 1939, No. 29663. [Class 40 (v)] The range and rate of change of range of an object, such as an aircraft, are determined separately. The frequency of an oscillator 1, Fig. 1, is modulated by a saw-tooth modulator 2 and the output is fed by a transmission line 3 to a dipole aerial 4 mounted in a reflector 5. The signal after reflection from the distant object is received on a dipole aerial 7 and passed by a transmission line 8 to a receiver 9. A small proportion of the radiated signal from the oscillator 1 is byepassed by a coupling 10 direct to the receiver 9. This produces a difference frequency which depends both on the velocity of the target in the line of sight and on its distance, and is fed to one input circuit of a meter unit 11. A second oscillator 12 generates a constant frequency which is transmitted to a dipole aerial 14. After reflection, the signal is received on a dipole aerial 16 and transmitted to a receiver 19. A small portion of the transmitted oscillation is passed directly to the receiver 19 through a coupling 20. The output of the receiver contains a difference frequency which depends only on the velocity of the target in the line of sight, and is fed to one input circuit of the meter unit 11. The four directional reflectors 5, 6, 15, 17 have parallel axes and can be turned together in any desired direction. The meter unit is shown in Fig. 2. The difference frequencies from the receivers 9, 19 are fed to frequency meters 24, 23 respectively, these meters developing a D.C. output which depends on the frequency but not the magnitude of the input. The outputs of the meters 23, 24 are fed to a network comprising D.C. indicators 25, 26 and a resistance 27. The output of the meter 23 is fed through the indicator 25, which is calibrated in line of sight velocity or rate of change of range. The output of the meter 23 also passes in part through the indicator 26, through which also passes in the reverse direction a part of the output of the meter 24. The output impedances of the meters 23, 24 and the impedances of the indicators 25, 26 and the resistance 27 are so chosen that the component of the current from the meter 23 passing through the indicator 26 is equal and opposite to the part of the component of current from the meter 24 passing through the same indicator and representing the rate of change of range component of the output of the meter 24. The indicator 26 may then be calibrated directly in terms of range.
Patent GB-192766-A (GB)
Title: Improvements relating to hypodermic syringes
IPC: A61M5/31
Filed: 1921-11-08
Abstract: 192,766. Froggatt, G. H. Nov. 8. 1921. Syringes.- A one-piece nozz!e for a hypodermic syringe is formed with a hemi-spherical expansion chamber A, so that the soft metal head of the needle is pressed forward and not laterally into the screw threads B. Reference has been directed by the Comptroller to Specification 117,654.
Patent GB-298911-A (GB)
Title: Improvements in and relating to frictional driving-gear
IPC: F02N15/08
Filed: 1928-10-15
Abstract: 298,911. Dow Patents Holding Corporation, (Assignees of Dow, A.). Oct. 14, 1927, [Convention date]. Turning-gear. - Friction gearing, applicable for use in electric starters for motor-vehicle engines, is automatically engaged when the motor or other driving member is started and automatically disengaged when the engine or other driven member speeds up. Friction surfaces 15, 25 are formed on coaxial sleeves 9, 10, one 9 turning with but sliding on the driving-shaft 2 and carrying rollers 18, 19 or cam surfaces engaging cam surfaces 26 or rollers on the sleeve 10, which is free axially and rotarily on the sleeve 9 and has substantial inertia. A spring 28 normally spaces the sleeves 9, 10. When the shaft 2 is started, the surfaces 15, 25 grip the edge 7 of a flywheel 6 on the engine, and upon the engine speeding-up, the surfaces 15, 25 move apart. The sleeve 9 may be fixed upon the shaft 2, which moves endwise with the armature, when the motor is started, to engage the surfaces 7, 15. The rollers 18, 19 engage normally in shallow depressions on the cam surfaces 26, which may be of 7‹ inclination, the inclination. of the friction surfaces 7, 15, 25 being preferably 3‹ to the plane at right angles to the axis of the shaft 2. In one modification, the surfaces 7 are curved, and in another are formed upon a thin ring formed or secured on the edge of the flywheel 6.