baber/WOPTO huggingface dataset:
Patent GB-1298513-A (GB)
Title: Refraction measuring apparatus
IPC: A61B3/10
Filed: 1970-02-18
Abstract: 1298513 Photo-electric eye testing AMERICAN OPTICAL CORP 18 Feb 1970 [24 March 1969] 7819/70 Heading G1A [Also in Division G2] Apparatus for measuring refractive errors in an eye so as to avoid the need for subjective responses and uncontrolled attempts at accomodation during measurement comprises a target 52 (in this embodiment a Ronchi ruling), means for producing an image thereof, and a prism group 38' for dispersing the image for transmission to the retina 48' of the eye. The light is collimated 34' and reflected by a beam splitter 36' through the prism group 38' and then reflected at the retina, from which the light travels in the reverse direction through 38' (where it is recombined) and through the beam splitter 36' to a slit 54. The slit is narrower than the dimension of a single line and space of the ruling image so that relative movement thereof (caused by moving the light beam before it passes through the slit by, e.g. vibrating a mirror in the beam) gives rise to a light signal of varying amplitude which is fed to a detector 56. This signal will attain its maximum amplitude when and only when the image is correctly focused on the retina and the detector is arranged to provide a suitable output to indicate this, whereby a quantitative indication of the  refractive error of the eye may be obtained. The above apparatus may be used in testing astigmatism either by a conventional radial line pattern or by means of a set of rotatable Ronchi lines. The slit and detector may be omitted, and the image observed by an examiner Figs.1 and 2 (not shown). A fixation target 44' may also be used in order to help control the accomodation of the eye.
Patent GB-112724-A (GB)
Title: Improvements in Moulding Machines.
Inventor: LARSON RAGNAR EWALD
IPC: B28B7/10
Filed: 1917-05-31
Abstract: 112,724. Larson, R. E. May 31, 1917. Moulds. - In machines for moulding concrete, clay, &c., of the type in which the cores 6 and moulds 8 are moved simultaneously in opposite directions to release the moulded products, the cores and moulds are connected by links 4, 7, to disks 3 mounted upon a common shaft 1 operable by a lever 2. The links 4, 7, may be provided with adjusting-means 11 to take up wear, &c.
Patent GB-526221-A (GB)
Title: Improvements in apparatus for the straining or filtering of fluids
IPC: B01D29/19
Filed: 1939-03-10
Abstract: 526,221. Gas filters. PATERSON ENGINEERING CO., Ltd., and KERRISON, O. C. March 10, 1939, No. 7857. [Class 8 (ii)] [Also in Group I] In a filter element, formed by coiling a wire on longitudinal rods or a former a with ribs b, end caps d, e are provided having flanges, the external diameter of which is not greater than that of the coil and the coil is continued over the flanges. Channels f are provided on the flanges to receive the end turns of the coil, adjacent metal being pressed over to hold the wire securely in the channels. Each end cap may have a tongue k which is pressed down between adjacent ribs of the former to prevent movement of the cap. As shown in Fig. 1 the cap d has an extension d<SP>1</SP> which can be fixed in the wall of a container. Fig. 3 shows a cap d with an extension d<SP>2</SP> threaded for connection with a similar filter element.
Patent GB-594794-A (GB)
Title: Improvements in or relating to the starting of internal combustion engines
IPC: F02N99/00
Filed: 1945-03-28
Abstract: 594,794. Priming. PLANTA, G. De. March 28, 1945, No. 7867. Convention date, April 3, 1944. [Class 7 (v)] An installation for injecting priming fuel into the induction pipe 6 to facilitate starting, comprises an air compressor C driven by the engine, a supply of compressed air and a chamber 13 containing priming fuel connected to at least one nozzle 11 leading into the induction pipe, a control member being provided so that the compressed air from the compressor which builds up progressively as the compressor rotates places under pressure a space communicating with the priming fuel chamber so that priming fuel is injected into the induction pipe only after a few revolutions of the engine. The chamber 13 is put into communication with the atmosphere when it is desired to cut off the priming fuel. The compressor C supplies the compressed air to the chamber when a cock 17 is turned in a counter clockwise direction. When the cock is in the position shown the compressor is put into communication with a compressed air supply system. In the case of a multi-cylinder engine there may be a nozzle in the induction pipe of each cylinder adjacent the inlet valve. In this case a rotary distributor valve may be placed between the fuel tank and the pipes supplying the induction pipes. A return spring may be fitted to return the cock 17 after starting to the position shown. In a modification the compressor is a separate compressor driven by the engine and the cock 17 either connects the chamber 13 to the compressor or to the atmosphere.
Patent GB-974025-A (GB)
Title: Continuous annealing furnace
IPC: C21D9/56
Filed: 1963-02-28
Abstract: 974,025. Continuous annealing furnaces. K. FRITZ. Feb. 28, 1963 [Sept. 12, 1962], No. 7990/63. Heading F4B. An oil or gas heated continuous annealing furnace in which the articles to be annealed are drawn in one direction through several substantially horizontal tubular narrow passages 1, and heating gases in these passages flow in the opposite direction to be extracted by a fan through outlet 5, includes combustion chambers 3 extending substantially parallel to the passages 1, and having in their end walls one or more horizontally arranged burners 4, several of the passages 1 communicating with the lower regions 2 of the combustion chambers. The passages 1 are formed by a series of fire-resistant apertured bricks. The combustion chambers 3 are of vault-like construction, and are provided with thermo-elements 6 adapted to control the burners. Preheating takes place in section A, and annealing in section B, the annealed material being withdrawn through section C.
Patent GB-512529-A (GB)
Title: Improvements in or relating to laminated springs
IPC: F16F1/20
Filed: 1938-03-15
Abstract: 512,529. Laminated springs. LLOYD, F., and IBBOTSON BROS. & CO., Ltd. March 15, 1938, No. 8065. [Class 108 (iii)] In a laminated spring, the underface of each lamination 11 is recessed throughout its length with a single recess, and the sides of each lamination are inclined so that the upper face of one lamination is narrow enough to enter the recess in the lamination above and each lamination is broad enough at the bottom to form the sides of the recess which accommodates the lamination below. Interleaving strips 21 of zinc, brass, synthetic resin or the like may be provided. The spring leaves may be produced by rolling spring steel to the desired section and cutting it into lengths. Specification 370,800 is referred to.
Patent GB-813699-A (GB)
Title: Improvements in or relating to apparatus for the vulcanisation of rubber covered wire and cable
Inventor: RICHARDS ARTHUR BRUCE FRASER G
IPC: B29C48/00
Filed: 1956-03-15
Abstract: A tubular vulcanizing chamber for the vulcanization of rubber-covered wire or cable comprises an assembly of at least two tubes 1, detachably secured together by steam-tight joints and each having a tubular jacket 8, Fig. 2, and an inner sleeve 11, access being provided for the vulcanizing fluid, e.g. steam, to the internal and external surfaces of the sleeve 11 which are inert to said fluid, and at least the internal surface is inert to the material to be vulcanized.  The sleeves 11 may be of stainless steel or other metal having the desired inertness, with or without an internal coating of polytetrafluoroethylene or other inert non-metallic material. Alternatively the sleeves 11 may be of a metal not inert to the vulcanizing <PICT:0813699/IV (a)/1> <PICT:0813699/IV (a)/2> fluid but coated internally and externally with an inert material. Holes 19 are provided in the sleeves 11 for passage of the vulcanizing fluid, which is supplied by means (not shown) coupled to the end extensions 4 of the vulcanizing chamber.  Each sleeve 11 has at one end a radial flange 12, Fig. 3, held between sealing rings 13, 14 clamped by bolts 3 between flanges 2 on the tubes 1, the parts 2, 3, 12, 13, 14 forming the steam-tight joints between the tubes 1.  A socket 15 is formed in each sleeve 11 adjacent the flange 12 for receiving the end 16 of the adjacent sleeve 11, a clearance 18 being provided between the inner end of the socket 15 and the edge of the part 16 to permit thermal expansion of the sleeves 11 relatively to the tubes 1.  In an alternative construction the sockets 15 are omitted and the adjacent ends of the sleeves 11 are spaced slightly from one another to permit the said thermal expansion.  In this construction projections on the sleeves 11 maintain them coaxial with the tubes 1.  In two further constructions the sleeves 11 are not flanged, and either abut against each other or one end of each sleeve engages a socket in an adjacent sleeve, and thermal expansion of the sleeves is permitted against the action of a helical spring mounted at one end of the vulcanizing chamber.
Patent GB-706167-A (GB)
Title: Improvements in or relating to circuits for generating sawtooth currents
IPC: H03K4/90
Filed: 1952-11-10
Abstract: 706,167. Saw-tooth generating circuits. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. Nov. 10, 1952 [Nov. 10, 1951], No. 28205/52. Class 40 (6) A sawtooth current generating circuit of the type in which a substantially constant voltage is periodically applied to a transformer, comprises a series circuit resonant at the sawtooth repetition frequency, connected across the transformer. The Figure shows a conventional autotransformer circuit including a damping diode 5 and H.T. boosting capacitor 6. The shape of the initial portion of the current waves in the deflection coils 2 is adjusted by the series circuit 9, 10, 11.
Patent GB-186357-A (GB)
Title: Improved internal combustion engine
IPC: F02B23/00
Filed: 1921-03-16
Abstract: To prevent knocking in the engine, when using kerosene or like low grade fuels, benzole, alcohol, zylidin and aniline are added to the fuel.  Reference has been directed by the Comptroller to Specification 154,640, [Class 7 (ii), Internal-combustion engines, Arrangement &c. of].
Patent GB-558155-A (GB)
Title: Improvements in or relating to pyrophoric lighters
IPC: F23Q2/14
Filed: 1942-06-17
Abstract: 558,155. Pyrophoric lighters. SANDOR, B., and MECHANICAL LIGHTERS & ENGINEERING, CO., Ltd. June 17, 1942, No. 8283. [Class 75 (iii)] The steel striker 2 on which the flint of a pyrophoric lighter is rubbed is:provided with a central wick passage 4 and is formed with peripheral open-mouthed slots 3 to admit air to enhance the flame. In the construction shown the striker is mounted by a plastic heat-resisting tube 5 in a fuel container 1 fitted with a removable cap carrying a flint 10. The tube 5 is filled with wadding and is closed at the bottom by a plug 7 formed with a capillary passage or passages 8. In another construction the striker is moulded into a plastic container which is open at the bottom and is threaded to receive identical top and bottom caps carrying flints. In a third construction the striker is integral with the container and formed with bayonet slots to receive the cap. The wick support may be fixed to or detachably secured in the cap and may be provided with spring clips to engage a separate spirit container. Fig. 4 shows a steel formed by a base 13 having acute-angled upstanding ends 14, the spaces between the ends forming the slots 3.
Patent GB-775923-A (GB)
Title: Coupling device between a tractor and a harrow or the like
IPC: A01B59/06
Filed: 1955-03-22
Abstract: 775,923. Agricultural implements. JOHANSSON, N. H. I. March 22, 1955, No. 8297/55. Class 6(1). An implement such as a harrow is attached to a tractor by means of a link 6 and eyelet 1 to allow lateral movement of the implement with respect to the tractor, the implement being raised by the engagement of supporting arms 4 with a drawbar 5 connected to lifting arms 7. When in the raised position the eyelet 1 lies between two upright members 2 thus securing the harrow against lateral sliding movement during transport. A connecting link 16 is attached to the members 2 together with a hook 27 for chains 28 which support the rear end of the harrow. Guide plates 3 are provided which abut against one of the lifting arms 7 when the machine is raised from the position shown in Fig. 4 and bring the harrow into line with the tractor as it is raised from the ground.
Patent GB-104803-A (GB)
Title: Improvements in Liquid Meters.
IPC: G01F1/08
Filed: 1916-06-14
Abstract: 104,803. Tylor & Sons, J., Battey, S. A., and Moore, J. C. June 14, 1916. Impulse and reaction meters; governing and regulating meters.-The speed of rotation of the fan-wheel in a meter of the kind described in Specification 1775/14 is regulated to the quantity of liquid passed through the meter by masking .the pockets formed in the base of the casing b by the radial webs 25 by means of a pivoted disk 22 having spokes 20. The disk 22 is held in the desired position by a spring detent.28 engaging projecting teeth 26. A plug 30 is screwed into the outer casing f of the meter to permit of access to the adjusting-device. The spokes may have stepped sides, instead of straight sides as shown.
Patent GB-346944-A (GB)
Title: Improvements relating to puncher-slotting machines
IPC: B23D27/00
Filed: 1930-03-15
Abstract: 346,944. Slotting machines. MUIR & CO., Ltd., W. and WOOD, V. C. N., Sherbourne Street, Strangeways, Manchester. March 15, 1930, No. 8437. [Class 83 (iii).] A slotting-machine of the puncher type is provided with a head a which carries the vertical tool ram b and is fed intermittently during operation and continuously at high speed for adjustment on horizontal ways while the work table c, which moves transversely of the tool-head, is also provided with an intermittent operative feed and a quick-traversing setting-feed. The quick traverse movements are derived from a motor d which is connected through gears e, f, g, i to a nut j on the traversing screw j<1> of the table and through gears e, f, g, h, k to a screw m operating the head a. The reciprocation of the tool slide is effected by a motor n which acts through gears o .. r and crank pin s or a slotted lever t engaging the tool slide in the manner described in Specification 26039/10, [Class 83 (iii), Metals, Cutting]. The intermittent feeds are derived from the crank pin s which engages a slotted member u carrying a pin v actuating a Geneva wheel w, the latter being connected through gears y, change-speed gears z, and reversing bevel gearing 2 to the shaft which operates the screw m and the nut j. By suitable clutches, the feed movement may be imparted either to the head a or to the table c, or to both. The intermittent feed is disengaged when the motor d is in motion. The slot u<1> is curved to correspond with the path of adjustment of the crank pin s so that the feed occurs at the same part of the stroke for all settings of the pin s. The tool head is held down on its guides by tapered gibs 3 .. 6, which are inserted from opposite sides of the head. Similar tapered gibs 7, 8 prevent lateral movement of the head.
Patent GB-565856-A (GB)
Title: Improvements relating to electrical contact arrangements
IPC: H01H1/16
Filed: 1943-05-26
Abstract: 565,856. Switch contacts. STANDARD TELEPHONES & CABLES, Ltd., and. MADDOCK, A. J. May 26, 1943, No. 8453. Addition to 558,169. [Class 38 (v)] A circular contact 3, as in the parent Specification, has a part of reduced section as at (d) upon which the triangular blocks 8 bear so as to reduce the frictional moment about the axis of the contact 3 and ensure that rotation occurs on engagement with the main contact 1. The reduced part may be central, as shown; or on the two sides of the circular contact 3. The abutting surfaces of the contact 3, blocks 8 and contact 1 may be knurled, serrated or otherwise roughened.
Patent GB-478924-A (GB)
Title: Improvements in or relating to devices for the reception of signals transmitted to moving motor cars
IPC: B60Q1/50
Filed: 1937-03-23
Abstract: 478,924. Photo-electric signalling- apparatus. FALKENTHAL, E., and PRESSER, E. March 23, 1937, No. 8477. Convention date, March 28, 1936. [Class 40 (iii)] A device for the reception of " overtaking " signals transmitted by means of pulsating light from one moving motor car to another comprises a light-sensitive cell 1 on which the light falls, in combination with known means such as a transformer 2 for separating the current pulsations produced by the cell from the D.C. on which they are superposed, a rectifier 3 for rectifying the generated A.C., and an indicating device 4 responding to the rectified A.C. and operating a shutter 6 which gives a signal by exposing a lamp 7. The cell is preferably one of the type which generates current under the influence of light, and may be constructed as described in Specification 375,916. An additional source of current may be used in conjunction with the cell if required, and this source may also supply current to the lamp 7. Instead of the transformer 2, a choke may be used, in combination with a condenser. Fig. 4 shows a construction in which the elements of the receiving device, except for the indicator 4, are built into a casing 14 having the form of a headlamp.
Patent GB-107584-A (GB)
Title: Improved Manufacture of Acetaldehyde.
Filed: 1917-06-13
Abstract: 107,584. Deutsche Gold & Silber Scheideanstalt vorm. Roessler. June 14, 1916, [Convention date]. Acetaldehyde. - In the production of acetaldehyde from acetylene and steam at high temperatures in the presence of catalyticallv acting metal oxides, increased yields are obtained by using catalysts free from phosphorus compounds and by purifying the acetylene from phosphorus compounds. Tn an example, the catalyst employed is a mixture of molybdic acid with asbestos.
Patent GB-1017113-A (GB)
Title: Improvements in or relating to signal actuated relay circuit arrangements
Inventor: BROOK-FOOTITT ERLE
IPC: H03K17/04
Filed: 1962-03-06
Abstract: 1,017,113. Transistor switching circuits. MARCONI CO. Ltd. Oct. 18, 1962 [March 6, 1962], No. 8521/62. Heading H3T. In a relay circuit arrangement switchable in response to the polarity of signals in an input train of signals applied thereto a plurality of transistors connected across parts of a potentiometer through which a voltage is supplied to a load are rendered conductive by oscillations from a transistor oscillator when the train of input signals have a predetermined polarity. Telegraph signals which are symmetrical to earth are applied at terminal 1 and after filtering by SR, SC are applied to transistor 25 which controls the telegraph bias. A polarity reversing switch arrangement comprising transistors 26, 27 and switch SW determines the polarity of the train of input signals to be applied to transistors 29, 30; the polarity of the input signals determining which of these two transistors is cut off and hence whether oscillations from multivibrator 23, 24 are fed to winding 5 or 5<SP>1</SP> of a transformer via transistor 32 or 33. When multivibrator 23, 24 is not producing oscillations transistors 12, 13, 14 and 12<SP>1</SP>, 13<SP>1</SP>, 14<SP>1</SP> are cut off by current flowing through the resistances R11 to R16 and R11<SP>1</SP> to R16<SP>1</SP> but if transistors 12, 13, 14 are rendered conducting by oscillations over winding 5 collector currents in the form of pulses at the oscillation frequency are produced which, when smoothed by condenser K result in a unidirectional current in a load L such as a teleprinter. If, oscillations are supplied over winding 5<SP>1</SP> transistors 12<SP>1</SP>, 13<SP>1</SP>, 14<SP>1</SP> conduct. By connecting the transistors 12, 13, 14 &c. as shown across the potentiometer the output current if the load becomes a short circuit is limited below the maximum rating for the transistors. In the arrangement of Fig. 1 (not shown), two Hartley oscillators are employed instead of the multivibrator one oscillator supplying oscillations to winding 5 when the polarity of the train of input pulses is one value and the second oscillator providing oscillations to winding 5<SP>1</SP> when the polarity is reversed.
Patent GB-568918-A (GB)
Title: Improvements in and relating to soldering methods
IPC: B23K35/00
Filed: 1943-05-28
Abstract: 568,918. Soldering. BRITISH ALUMINIUM CO., Ltd., and RICHMOND, J. T. May 28, 1943, No. 8568. [Class 83 (iv)] [Also in Group II] In a method of soft soldering aluminium in sheet, wire or foil form to aluminium, copper, tin or zinc, the surface of the aluminium is first coated by chemical formation with zinc or zinc containing either tin or cadmium, or both, then heat treated so that the coating is bonded to the surface, and then tinned. Soldering to a similarly prepared aluminium surface or to tinned copper, &c. by any normal solder such as tinsmith's solder, by a soldering bit of tinned copper, is then effected. Coating may be effected by immersing in an alkaline solution, preferably a cyanide solution such as zinc cyanide, or containing zinc together with tin or cadmium, or both. A solution may contain 10 parts of zinc cyanide, 10 parts of caustic soda and 0.75 part of cadmium sulphate in 40 parts of water. Such a coating is subsequently heated at about 350-450‹ C., preferably to 420‹ C., by direct heating or by immersing in a molten metal bath such as of lead or lead-tin alloy, preferably containing 2 to 3 per cent of antimony. Tinning may be effected with pure tin or high tin-cadmium alloy, or tinsmith's solder consisting of two parts of tin to one of lead by direct application or by dipping in molten solder. Soldering may be effected with tinsmith's solder.
Patent GB-1535240-A (GB)
Title: Squeeze mop
IPC: A47L13/146
Filed: 1976-03-03
Abstract: 1535240 Squeeze mop SABCO Ltd 3 March 1976 [6 March 1975] 8579/76 Heading A4F A squeeze mop comprises a body provided with a socket 3 for a handle 4 and having wings 5 connected thereto by integral flexible hinges 6, a sponge pad affixed to the wings, and a one-piece actuator 7 hinged to the body. When the actuator is moved downwardly, the wings are moved towards each other causing squeezing of the sponge pad. The actuator has members 8 with flat lower ends, which contact the upper surfaces of the wings so as to prevent upward movement thereof beyond the horizontal position when the actuator is in its raised position and inside surfaces which engage the upper surfaces of the wings in wedging manner when the actuator is in its lowered position.
Patent GB-1196399-A (GB)
Title: Process for the preparation of Polyurethane Prepolymers and Cured Polyurethanes obtained therefrom
Inventor: DAWSON ROBERT LOUIS
IPC: C08G18/28
Filed: 1969-02-17
Abstract: 1,196,399. Polyurethanes. E. I. DU PONT DE NEMOURS & CO. 17 Feb., 1969 [16 Feb., 1968], No. 8586/69. Heading C3R. A polyurethane prepolymer, which is heatcurable, is prepared by reacting: (A) a polyol having a M.W. up to 10,000; (B) an organic polyisocyanate in an amount up to at least 1À2 times the stoichiometric amount required for reaction with the OH groups in A; and (C) a 2,3-epoxy alcohol in which R<SP>1</SP> and R<SP>2</SP> independently represent H or a C 1-4  alkyl group. The equivalents of C used may range from 85 (B - A)/200 to 115 (B - A)/200 where A and B represent the equivalents of polyol and isocyanate respectively. Preferred C is 2,3-epoxy-1-propanol (glycidol). A may be a mixture of a polyol of M.W. >350, e.g. polytetramethylene ether polyol (M.W. 350-3000), and a polyol of M.W. <350, e.g. trimethylolpropane and/or butane diol. B may be an aromatic polyisocyanate, e.g. 2,4- and/or 2,6- tolylene diisocyanate or 4,4<SP>1</SP>-methylene bis- (phenyl isocyanate). The reaction of A, B and C may take place at 70-90 C. Cross-linking may be effected by heating to a higher temperature, e.g. 100-150 C. The polymers are useful in mouldings and as adhesives.