baber/WOPTO huggingface dataset:
Patent GB-990394-A (GB)
Title: Improvements in or relating to co-ordinate converters
IPC: G01R25/00
Filed: 1962-06-27
Abstract: 990,394. Voltage measurement; phase angle measurement. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. June 27, 1962 [June 30, 1961], No. 24702/62. Heading G1U. [Also in Division G4] A converter for changing rectangular coordinates into polar co-ordinates comprises a resonant circuit formed by an inductor and a capacitor, an arrangement for exciting two 90 degrees phase shifted natural oscillations of the resonant circuit, the amplitude of which correspond to the rectangular co-ordinates, a peak value detector for detecting the peak value of the overall oscillation composed of the two natural oscillations of the resonant circuit, and a phase-measuring device for measuring the phase of the overall oscillation. Voltages corresponding to the rectangular co-ordinates to be converted are set up by sources of potential 25 (+Y1) and 26 (-X1). A distributing switch 1 connects these via a direct voltage amplifier 8 to a resonant circuit comprising a capacitor 9 and an inductor 10. In this circuit two 90 degrees phase shifted natural oscillations are produced, by arranging that the switch arm 2 repeatedly connects the sources 25 and 26 alternately to the resonance circuit, the arm being under the control of a control circuit.which causes it to rotate at a rate related to the natural frequency of oscillation. The amplitude square of the total oscillation produced in the resonant circuit is equal to the sum of the squares of the amplitudes of the composite oscillation, and therefore the amplitude will be proportional to the radius of the polar co-ordinates. This signal is fed via an amplifier 12 to a peak value detector consisting of a diode 13 and capacitor 14. The capacitor charges to the peak value of the oscillation, and this voltage is available as one output of the converter. The phase of the overall oscillation depends upon the ratio between the amplitudes of the composite oscillation, and is determined by passing the overall signal via an amplifier 17 to a peak limiter 18 and thence to a differentiating circuit 19. The negative pulses from this are selected by the circuit 20 and fed to one side 2 of a bi-stable trigger circuit 21. This has previously been set at a fixed instant to the other side 1, this being arranged to close a switch 22 to allow pulses from source 23 to be applied to a counter 24. The first pulse to the side 2 opens the switch again, so that the reading in the counter will indicate the phase of the overall oscillation, and thus the polar angle. The switches 16, 27, 28 are operated under the control of the control circuit operating the arm 2 to ensure that the system is reset after each rotation of the arm.
Patent GB-925910-A (GB)
Title: Production of aromatic ethers
Inventor: STEPHENSON ROBERT JAMES
IPC: C07C41/06
Filed: 1960-07-15
Abstract: Aromatic ethers are prepared by reacting an alcohol with a vinyl-substituted aromatic compound in the presence of an acid catalyst and a salt of a metal that can exist in at least two valency states.  The alcohol is preferably a primary or secondary aliphatic alcohol and specified alcohols include methanol, ethanol, propanols, butanols, amyl, lauryl, allyl and benzyl alcohols, ethylene glycol and monobutyl ether and cyclohexanol. Specified vinyl aromatic compounds include styrene, vinyl-toluenes, p-benzylstyrene, chlorostyrenes, nitrostyrenes, divinylbenzenes and vinyl-naphthalenes.  Specified metal whose salts may be used are copper, cobalt, mercury, titanium, zirconium, chromium, manganese and iron.  In examples hydrogen chloride is passed into ethanol, n-butanol or ethylene glycol mono-n-butyl ether and the solution so obtained is reacted with a suspension of cuprous chloride, cobaltous chloride or mercuric acetate in styrene to give ethyl or n-butyl or n-butoxyethyl a -phenethyl ether.
Patent GB-1123396-A (GB)
Title: Improvements in and relating to the manufacture of flue linings and the like
Inventor: TURNER JOHN FORDYCE
IPC: B28B21/98
Filed: 1966-06-03
Abstract: 1,123,396. Rebated hollow articles. ENSOR & CO. Ltd. 1 June, 1967 [3 June, 1966], No. 24748/66. Heading B5A. Apparatus for forming rebates or stepped joints on the opposite ends of open-ended hollow bodies, e.g. flue linings, comprises two half-formers 11, 12 convergent around the body, two support members, e.g. drums 21, 24, entering the body through opposite ends to sustain the body from inside against distortion, the support members carrying a female rebating die 27 (see also Fig. 3, not shown) and a male rebating die 28 acting to form rebates on opposite ends of the body by compression. The support members may be vibrated. The bodies may be placed vertically or horizontally in the apparatus. One or both rebating dies may be attached to the support member resiliently under spring loading (Fig. 3, not hown). Half-formers 11, 12 may have locking members 17, 18. Movement of the support members and half-formers may be controlled by devices displaced by the movements of these members themselves, e.g. via fluid-pressure actuated piston-cylinder assemblies, and the mechanism may also include a starting device actuated by the closure of a protective guard or grill.
Patent GB-1494459-A (GB)
Title: Process for preparation of diacetoxybutene
IPC: C07C67/05
Filed: 1976-06-15
Abstract: 1494459 Diacetoxybutene MITSUBISHI CHEMICAL INDUSTRIES Ltd 15 June 1976 [17 June 1975 23 Oct 1975] 24772/76 Heading C2C Diacetoxybutene is prepared by reacting butadiene, acetic acid, and oxygen in an oxygencontaining gas in the presence of a supported palladium catalyst, and in which the butadiene used has a vinylcyclohexene content is in an amount of not more than 5000 parts by weight per million parts by weight of butadiene and at least one polymerization inhibitor is present. The polymerization inhibitor may be quinone, hydroquinone, 2,5-di-t-butylhydroquinone, 2,5- di - t - amyl - hydroquinone anthraquinone, a derivative of phenol, e.g. t-butylcatechol, 2,6- or 2,4-di-t-butyl phenol, 2,4-di-t-butyl-p-cresol, 4,4<SP>1</SP> - butylidenebis(3 - methyl - 6 - t - butylphenol), and 2,2<SP>1</SP>- methylenebis(4 - methyl- 6-t-butylphenol and elemental sulphur. A process is described in which the product, acetic acid and butadiene are separated by distillation stages and the residue recycled to the acetoxylation.
Patent GB-750123-A (GB)
Title: Improvements relating to contact clamps for use in electrolytic processes
Inventor: HISLOP WILLIAM BELL
IPC: C25F7/00
Filed: 1951-10-24
Abstract: 750,123. Electrolytic etching apparatus S.D. SYNDICATE, Ltd.. Jan. 22, 1963 [Oct. 24, 1951], No. 24872/51. Class 41. A metal plate 3 is mounted for electrolytic etching on an endsupport 1 and is clamped in position by a member 2 hinged to the support 1 and provided with a biasing weight 5; the member 2 is provided with an L-shaped strip 6 of silver or copper for making electric connection to the plate 3. The hinge may comprise a flexible strip 4 of insulating material fixed to the support 1 and detachably secured by a wing-nut 7 to the member 2. In a modification the strip 4 passes through the nip of the hinge and is secured to the opposite side of the support 1.
Patent GB-302961-A (GB)
Title: Improvements in the manufacture and production of plastic compositions, lacquers, filling or priming compositions and the like from nitrocellulose
IPC: C08K5/12
Filed: 1927-09-22
Abstract: 302,961. Johnson, J. Y., (I. G. Farbenindustries Akt.-Ges.). Sept. 22, 1927. Phthalic acid esters in which one carboxyl group is esterized with the radical of an aromatic or hydroaromatic alcohol whilst the other carboxyl group is esterized with the radical of an aliphatic or aromatic alcohol, are used as plasticizing agents in making elastic films, lacquers, coatings and plastic compositions containing nitro-cellulose. Examples of such esters are benzyl-n-propyl-phthalate, benzyl - isoamyl - phthalate, benzyl-cyclohexylphthalate, cyclohexyl-isoamylphthalate, and the mixed ester from benzyl alcohol and glycomonomethyl ether. These esters may be obtained by first preparing an acid ester from phthalic anhydride and one of the desired alcohols and then converting the acid ester into the neutral ester by reacting with the other desired alcohols, preferably in the presence of a catalyst, such as sulphuric acid or sodium bicarbonate. The conversion of the acid ester can also be performed by first converting the free acid radical into its chloride and acting upon the chloride of the monoester obtained with the other alcohol, or by acting upon an alkali metal salt of the acid ester with a chloride corresponding to the alcohol desired. Natural and artificial resins, such as dammar, manila, copal, elemi, sandarach mastic, ester resins, resins from cyclic ketones, coumaron and indene resins, vinyl resins and condensation products of urea and aldehydes, may be added to the mixture of nitro cellulose and plasticizer, and also other plasticizing agents such as tricresyl phosphate, colouring matters and filling materials such as talc, ground s'ate and lithopone. Examples are given.
Patent GB-277980-A (GB)
IPC: B24B47/14
Filed: 1927-09-22
Abstract: 277,980. Chicago Pneumatic Tool Co., (Assignees of Meunier, L. F.). Sept. 23, 1926, [Convention date]. Casings. - In a fluidpressure motor suitable for portable tools for grinding, &c., the eccentric 20 for operating the slide valves of the radial cylinders is mounted on a stub 21 secured to the handle B in line with the tool and crankshaft 3 and is driven from the crank-pin 6, the end of which is a sliding fit in a hole in an extension 31 on the eccentric. The crank casing is vented by passages 32, 38 in the eccentric and stub respectively. The passage 32 is controlled by a. centrifugally-acting, spring- controlled check valve 34. The shaft 3 carrying the grinding-wheel C is supported in ball bearings and passes through an extension of the casing a forming a handle. Pressure of fluid in the extension prevents the loss of lubricant from the crank casing.
Patent GB-424169-A (GB)
Title: Improvements in and relating to dynamo-electric machines
IPC: H02K5/26
Filed: 1934-08-30
Abstract: 424,169. Cores for dynamo electric m a chi ne s. BRITISH THOMSONHOUSTON CO., Ltd., Crown House, Aldwych, London. Aug. 30, 1934, No. 25014. Convention date, Aug. 30, 1933. [Class 35] Casings.-In a fabricated stator, the laminµ are secured to an axial supporting member by plates interspersed in the laminµ, the plates having a projecting portion conforming to the supporting member and welded thereto, and transverse bars are located in notches in the plates and laminae and are welded thereto. In the form shown, intermediate plates 6, 7 and core end plates 4, 5 are welded to the support 1 which is so arranged as to enable the machine to be mounted on a vehicle axle and these plates and the laminµ 3 have grooves to receive bars 19 welded thereto. The plates 6, 7 have extended portions 16, 17 for supporting the machine and an axial reinforcing plate 25 is welded to these portions, and to the end plates 4, 5. The shoes 41 of the main poles have slots to receive bars 43 into which are screwed bolts countersunk in the bars 19. The bearing supporting plates 21, 30 are secured to the core structure by welded plates and are welded to the support 1.
Patent GB-842741-A (GB)
Title: An improved pin
IPC: A44B9/00
Filed: 1957-08-08
Abstract: 842,741. Pins. MILBURN, H. G., and MILBURN, A. B. E. Aug. 8, 1957 [Aug. 10, 1956], No. 25076/57. Class 43 A metal pin has one leg 1 carrying a series of serrations 6 folded over the other larger pointed leg 2 so that a serration 6 on one leg engages a serration 7 on the other leg. The end of the leg I may be varied in shape to provide a bulbous end or an inwardly turned end or a corkscrew end.
Patent GB-1509685-A (GB)
Title: Coded imaging systems and methods
IPC: G01T1/164
Filed: 1975-06-11
Abstract: 1509685 Spatial filtering RAYTHEON CO 11 June 1975 [26 June 1974] 25082/75 Heading G2J [Also in Divisions H3-5] A coded imaging system (especially for nuclear imaging of living tissue) spatially codes the radiation from the object in accordance with a predetermined code and the code is altered synchronously with alterations in the spatial response of the image reconstructing means. The invention allows the use of an on-centre Fresnel pattern as the coding means thus suppressing the zero orders, as with the use of the known off-axis Fresnel pattern codes, but allowing higher intensity sources to be imaged (due to the greater spacing of the opaque rings of the pattern) or providing greater resolution at low intensities. In Fig. 1, nuclear radiation from the heart or lungs 11 is spatially coded by a rotating mask 12 comprising two complementary on-axis Fresnel zone patterns. A detector 14 spatially detects, amplifies and feeds the pattern to a data processor 16 which supplies signals to a CRT 18 which displays the signals as bright spots which are imaged via lens 20 through a mask 22 on to a film 24. Mask 22 comprises a bar pattern 66 which is reciprocated synchronously with the rotation of mask 12. The Film 24 is developed at 30, is evenly illuminated by 34 and the spots are re-imaged by lens 36 on to a second film 32 which is developed and bleached at 38. The bleaching leaves the film 32 transparent with variations in dielectric constant corresponding to spot positions. Hence the reconstructing light from laser 40 and pin hole 44 is deflected by the film 32 as a function of the information stored in the film and, after passing iris 54, forms an image of the object 11 on a ground glass screen 56. The mask 12 may have three zone patterns.
Patent GB-778910-A (GB)
Title: Improvements in or relating to kilns
Inventor: ROBERTS GEORGE CECIL
IPC: F23M7/00
Filed: 1954-08-30
Abstract: 778,910. Kiln furnaces. MOLETON FOUNDRY CO., Ltd. Aug. 17, 1955 [Aug. 30, 1954], No. 25119/54. Class 51 (1). The kiln shown comprises a brick-built boxlike furnace 10 which is one of ten or other number of similar furnaces of the kiln which is circular, such furnaces being spaced uniformly around a central main chamber and supplying their hot gaseous combustion products to heating passages common to all. Each furnace comprises a grate 22 which, with a transverse grate support 21, divides it into a fire-box and an ashpit 26. An ashpit door 14 has a shuttercontrolled primary air inlet 15 whilst a fuelcharging door 13 has a hit-and-miss type damper 18, 19, for secondary air. The grate 22, which is formed as a complete detachable unit is, preferably, as in Specification 778,911. The furnace roof has an arch 27 and a flue outlet 28 leading to the kiln heating passages. The furnaces may be applied to a kiln of straight-sided form having the furnaces spaced apart along its sides.
Patent GB-774131-A (GB)
Title: Improved tensioning arrangement for framed flexible materials
IPC: B41F15/36
Filed: 1954-08-31
Abstract: 774,131. Stretching appliances. KNOWLES, R. A. Aug. 24, 1955 [Aug. 31, 1954], No. 25199/54. Class 11. [Also in Group XVI] A device for stretching a flexible web, e.g. a mesh 18 suitable for use in screen printing comprises a member 17 of U-section for tensioning the web in the direction in which the limbs of the U extend, and a pair of strips 19, 20, one of which is enwrapped by an end region of the web, capable of being accommodated in the space between the U-limb. The web is tensioned by means of screws 16 and butterfly nuts, the screws passing through projections on framework members 11-14 which are mutually engageable in alternative positions. After the mesh has been tensioned it is secured to one face of a frame disposed within the space defined by the four bars 11-14. Alternatively the stretching device may itself be used as a frame in which case the bars 11-14 are formed with portions bearing downwardly against the mesh iu the space enclosed by the U-shaped members, Figs. 5 and 6 (not shown).
Patent GB-232868-A (GB)
Title: Improvements in loose leaf binders
IPC: B42F13/00
Filed: 1924-10-23
Abstract: 232,868. Smart, J. G. Oct. 23, 1924. Post files; fastenings. - In a loose-leaf binder having upper and lower clamping bars 2, 3 provided with grooves 11 in which slide blocks 14, 16, the filing posts 5 are mounted on the lower blocks 14 and pass through the upper blocks 16. The latter are each formed with an aperture to receive a post and an extended slot 18 leading therefrom, the width of which can be. adjusted by a screw 19 so as to contract the block and thus allow it to slide freely in the groove 11 while gripping the post, or to expand the block, thus locking it in position in the groove 11, the post being at the same time set free. The ends of the slots are closed by jam places which protrude below the level of the clamping-bars and maintain the sheets in alignment. A loose collar on the screw 19 prevents longitudinal movement thereof.
Patent GB-842710-A (GB)
Title: Viscosity meter
Inventor: BREWER NATHANIEL
IPC: G01N11/10
Filed: 1956-08-20
Abstract: 842,710. Viscosimeters. FISCHER & PORTER CO. Aug. 20, 1956, No. 25416/56. Class 106 (2). A viscosimeter has an upright metering tube 6, a viscosity-sensitive float 11 therein, the tube and float together forming a passageway, the effective cross-sectional area of which increases as the float 11 approaches the outlet end 27 of the tube 6. A differential pressure regulator 20 is shunted across the inlet and outlet of the tube 6 and means 31 from a flow-restricting orifice in series with the tube 6, the pressure-drop across the orifice 31 being substantially greater than the pressure drop across the metering float 11, a relatively constant pressure drop across the orifice 31 and the metering tube 6 being provided. Fluid to be tested enters the system at 18 and flows along conduit 29 to the vertical tapered tube 6 containing a viscosity-sensitive float 11. It then flows along conduit 30, through a fixed orifice 31 and out of the system at 19. A differential pressure regulator comprising a float 22 in a wide-angled tapered bore 21 of a sleeve 20 and carrying a load 25 immersed in the fluid forms a by-pass from the inlet 18, through the bore 21 and holes 44 in the wall of the sleeve 20, to the outlet 19. Since the float 22 is subjected to the difference between the pressures at the inlet 18 and at the orifice 31, it will rise against the action of the load 25 and allow more fluid to by-pass the measuring tube 6 if this difference increases, and will fall if this difference decreases. Thus the differential pressure-regulator maintains a constant difference between the inlet and outlet pressures of the measuring tube 6 and so maintains a constant rate of flow through this tube. The float 11 thus gives an indication of the viscosity of the fluid, and may also be used to operate a recording instrument or control the viscosity of the fluid. Various kinds of float 11 are described and the tube 6 may be plain or may have guiding surfaces formed therein. Specifications 582,215, 610,708, 615,414, 615,518, 623,927, 634,800 and 636,556 are referred to.
Patent GB-885621-A (GB)
Title: Centrifugal control device for two-stroke engines
IPC: F01L7/12
Filed: 1960-07-21
Abstract: 885,621. Centrifugal governors. ATELIERS DE LA MOTOBECANE. July 21, 1960 [July 21, 1959], No. 25439/60. Class 57. [Also in Group XXVII] A speed control device for a two-stroke internal-combustion engine comprises a centrifugally operated shutter 16 which throttles the inlet to the transfer passage 9 at a predetermined speed. As shown, the engine comprises two transfer passages 8, 9, only one 9 of which is controlled by the governor 16; a separate governor may also control passage 8. The shutter 16, Fig. 4, is pivoted at 15 on the crank throw and is thrown outwards centrifugally against the force of spring 18. The crank throw may be notched at 12 opposite the transfer port 13 and the shutter 16 may be situated on the outside or inside face of the crank throw; when on the inside face it controls a passage in the throw co-operating with the transfer port 13. In a modification, Fig. 5, the shutter is pivoted at an intermediate point 27 and loaded by a spiral spring 28, the alteration in position of the centre of gravity from its initial position G 1  to its final position G 2  being arranged so that the force on the spring 28 is approximately the same in both positions.
Patent GB-517102-A (GB)
Title: Improvements in and relating to electric systems of ship propulsion
IPC: B63H23/24
Filed: 1938-08-31
Abstract: 517,102. Transmitting mechanical power. BRITISH THOMSON-HOUSTON CO., Ltd., JEWITT, D, E., and MARSH, R. D. Aug. 31, 1938; No. 25510. [Class 38 (iv)] A propulsion system for a ferry boat or other vessel having fore and aft screws 2, 1 respectively, driven by direct current motors independently variable in speed by field control, comprises a booster generator 5 in series with the field winding of the forward motor 6. The booster is differentially excited by a winding fed from a constant voltage supply and a winding 8 fed in accordance with the current of the after motor 7 so that increases in normal current therein cause an increase in field of the forward motor. To increase temporarily the torque capacity of the forward motor during starting and reversing and permit automatic distribution of propulsive power over both motors in the initial stages of starting and reversing the excitations of winding 9 may be reduced in stages. A resistance 10 may be provided to adjust the normal excitation of the forward motor. A circuit arranged for reversal of the motors 6, 7 is described, Fig. 2 (not shown), including reversing switches and resistance switches in the main circuit and in circuit with the field 9 which may be interlocked.
Patent GB-312010-A (GB)
Title: Improvements in or relating to conveying means and method
IPC: B21B39/12
Filed: 1928-09-07
Abstract: 312,010. White, A. E., (Morgan Construction Co.). Sept. 7, 1928. Roller-way conveyers.-In a conveyer for lumber or the rolled products of a steel mill comprising a series of aligned live roller units each unit comprises a pair of frusto-conical rollers 1, 2, Fig. 1, the axes of which are so skewed with reference to the centre line 4, Fig. 2, of the conveyer that the rollers of each pair work together in maintaining the conveyer material on this line. The lower end of the roller carrier 12 is formed as a hub 11 which is free to turn on a vertical driving shaft 8 mounted in a stationary base member 7. A bevel gear 19 on the shaft 8 engages a bevel gear 20 on the shaft 18 of the roller 2 which meshes with a bevel gear 21 on the shaft 16 of the roller 1. An arm 22 projecting'from each hub 11 is attached to a slidable bar 23 which when moved in one direction causes the rollers to take up the position shown in Fig. 3 and the material to be moved in the direction of the arrows B. Movement of the bar in the opposite direction causes the material to be discharged at the opposite side. In a modification the rollers of a unit are offset one from the other and may have individual driving devices such as electric motors. In another modification cylindrical rollers are employed. In a further modification the roller units are driven by an endless belt 59, Fig. 13.
Patent GB-1199658-A (GB)
Title: Boat Hull of the Planing Type
Inventor: CROSBY FRANCIS WILLIAMSON
IPC: B63B1/20
Filed: 1968-05-29
Abstract: 1,199,658. Planing craft. F. W. GROSBY. 29 May, 1968, No. 25843/68. Heading B7A. The hull of a planing craft has a central passage 5 on its underside which is flanked on both sides by elongated wedge strips 1p-4p of varying lengths to provide stepped rear ends so that the passage 5 widens by steps towards the stern.