baber/WOPTO huggingface dataset:
Patent GB-821911-A (GB)
Title: Tape reader
Inventor: ALLCARD JOHN
IPC: G06K7/10
Filed: 1957-10-24
Abstract: 821,911. Telegraph or like tape readers. ARNFIELD Ltd., J. & E. Oct. 24, 1957, No. 33312/57. Class 40 (3). A tape reader for perforated tape having a number of code perforation positions spaced across its width, comprises a guide way along which the tape is moved past a reading position, a light-source arranged on one side of the tape and a number of photo-transistors arranged on the other side of the tape, the photo-transistors being mounted in an opaque head having channels extending from one face thereof to the photo-transistors, the axes of the channels being a series of divergent straight lines in the plane of the reading position extending respectively from the light-source through one of the tape perforation positions to the photo-sensitive area of one of the photo-transistors. The tape 1 having perforations 3 as indicated at 5, 6, 7 is fed through a guide way 11 of a base member 10 having a slot 12 opposite the filament 17 of a lamp 16. The photo-transistors 27 are located in cylindrical cavities 28 at the ends of divergent passages 24, whose axes 25 pass through the perforation positions 3 ... 3 on the tape 1. The opaque head 18 is formed with a removable cap portion so that the photo-transistors can be correctly positioned in their cavities 28. The walls of the passages 24 are painted to give a matt black surface or a tarnishing material may provide the non- reflecting surface.
Patent GB-1482605-A (GB)
Title: Engines
IPC: F02M31/04
Filed: 1974-07-29
Abstract: 1482605 Heating IC engines and combustion air SOC D'ETUDES DE MACHINES THERMIQUES 29 July 1974 [16 Oct 1973 28 Dec 1973] 33369/74 Heading F1B A method of heating the air supply to one or more cylinders of a low compression ratio I.C. engine during starting thereof, the engine having an exhaust gas driven supercharger, comprising the steps of operating the engine so that only comression of the air drawn in takes place, while operating control means to impede the flow of exhaust gases from the cylinder(s) so that a controlled residual amount of working gases heated by compression is retained in the cylinder(s) to pre-heat the air subsequently entering, and operating said control means to provide flow of the exhaust gases unimpeded by the control means as soon as the engine has started. Compression-ignition engine 1 has an intake manifold 3 and an exhaust manifold 5 connected to individual cylinders 2 by branch pipes 6. The exhaust gas drives the turbine 7b of a high-pressure blower 7a and the turbine 8b of a lowpressure blower 8a. Between the blowers is an inter-stage cooler 17 and downstream of H.P. blower 7a is a cooler 23. Combustion air which enters cylinders 2 is heated by mixing with residual exhaust gas and the degree of heating is increased by restricting the outflow of exhaust gases so that a greater quantity of exhaust gases remains in the cylinders. Exhaust gas flow is restricted by a butterfly valve 48 or sliding damper at the outlet 10 of turbine 7b, or upstream of turbine 7a, or anywhere in duct 11, or at the outlet 13 of turbine 8b. In Fig. 2 (not shown) the exhaust gas control member (51) is at the downstream end of exhaust manifold 5 or a control member may be interposed in each branch pipe 6. The combustion air may also be pre-heated by  (a) Passing a hot fluid, instead of a cold fluid, through cooler 23. This is effected by changeover valves 34, 35. (b) Mounting a fuel burner 37 on intake manifold 3 and injecting hot combustion gases directly into the manifold. (c) Passing a hot fluid instead of a cold fluid through the liquid coolant circuit of the engine. This is effected by changeover valves 43, 44. (d) Enclosing the engine and heating the enclosure. The air pre-heating may be controlled through servo-control means in accordance with the instantaneous operating conditions of the engine, to vary the air temperature in inverse proportion to the load or rotational speed of the engine or the pressure of the air.
Patent GB-1150582-A (GB)
Title: A Method of Rolling Tubes and a Rolling Mill for Carrying out the Method
Inventor: VERDICKT JACQUES
IPC: B21B23/00
Filed: 1966-07-25
Abstract: 1,150,582. Rolling tubes. VALLOUREC S.A. 25 July, 1966 [23 July, 1965], No. 33388/66. Heading B3M. A thin tube is rolled from a blank by reducing the major part of the blank to its final thickness, while reducing the terminal part to a lesser extent. A tube having outside diameters D, and D2, Fig. 2, is thus produced. The blank is rolled on a mandrel by means of three rolls 1 which are each supported at one end in a fixed plate 4 and at the other end in an angularly adjustable plate 5. Rotation of the plate 5 by a piston cylinder assembly 11 against stops 9 and 10 varies the spacing of the rolls from, and also their angle of skew relative to, the centre line 6. The stop 9 is adjustable by being threaded into a fixed support, while the stop 10 too can be progressively adjusted during rolling to permit tapering of the blank. A photo-electric cell which detects the end of the blank immediately before it reaches the rolls, causes rotation of the plate 5 to move the rolls outwardly, thereby producing a tube with a thickened end. Each bearing, Fig. 6, for supporting one end of a roll is radially adjustable by means of a threaded piston 16 which is rotatable by a worm 19 and gear 18 within a fixed nut 20. The head of the piston is housed within a cylinder portion 15 of the bearing, pressure fluid being supplied to the cylinder such that under excessive rolling loads the bearing is able to move outwardly as a safety measure. The worms 19 of all the bearing are interconnected by gearing to provide simultaneous radial adjustment of the three rolls.
Patent GB-433994-A (GB)
Title: Improvements in the manufacture and production of a medium or base for use in the preparation of linoleum, oilcloth, floor and wall coverings, insulating compositions and like bodies
IPC: C08L93/04
Filed: 1934-11-21
Abstract: The invention relates to the production of a composition for use in the preparation of linoleum, oil-cloth, floor and wall coverings, insulating material, &c.  The composition is produced by heating rosin to 300 DEG  F. until the acetic acid has been set free, adding a drier and continuing the heating to 540 DEG  F., adding rubber and stirring and heating until the rubber is dissolved. The drier may be a suitable linoleate or resinate e.g. cobalt linoleate and may be added in amounts of about 2-4 per cent of the rosin.  The relative proportions of rosin to rubber may be about 3-4 : 1.  Specification 432,405, [Group III], is referred to.
Patent GB-901902-A (GB)
Title: Improvements in or relating to heavy duty lathes
IPC: B23B21/00
Filed: 1960-09-30
Abstract: 901,902. Lathe details. MASCHINENFABRIK FRORIEP G.m.b.H. Sept. 30, 1960 [Oct. 1, 1959], No. 33649/60. Class 83 (3). A heavy-duty lathe has the feed mechanism for longitudinal and transverse movement of a saddle and tool carriage 5 arranged in the saddle and accessible from above through a cover 10. The bed is arranged to be sunk into the floor so that the saddle can be ascended directly from the floor level 2 and the cover 10 forms a platform for the operator.
Patent GB-1049857-A (GB)
Title: Sawtooth waveform generators
Inventor: SIBLEY MICHAEL RALPH
IPC: H03K4/62
Filed: 1962-09-04
Abstract: 1,049,857. Semi-conductor sawtooth generating circuits. ELECTRIC & MUSICAL INDUSTRIES Ltd. Aug. 27, 1963 [Sept. 4, 1962], No. 33778/62. Heading H3T. In a sawtooth generator comprising a transistor in series with an inductor, the voltage across the transistor during the flyback period is reduced by connecting a silicon controlled rectifier in the circuit. In the line timebase circuit shown for a television receiver, the deflection coils L are connected in series with a transistor TR1 and a controlled rectifier SCR1 across a D.C. supply between terminals 2, 4. Control pulses are fed to terminal 1 and passed by emitter followers TR2, TR3 to switch on TR1 and SCR1, thus giving a linear rise of current in the coils L. TR1 is turned off at the end of each pulse at 1 so that the circuit L, C executes a half-cycle of oscillation during the flyback period, energy being returned to the supply by the efficiency diode D1 SCR1 becomes non-conductive when its anode current falls to a sufficiently low level. Resistors R4, R5 arrange that the flyback voltage divides between SCR1 and TR1 in the ratio 10: 1. The control voltage for SCR1 is limited by a Zener diode ZD1. TR1 may be replaced by an oppositely connected PNP transistor if the control pulses are coupled to the base by a transformer.
Patent GB-1188313-A (GB)
Title: Improvements in High Pressure Vessels
Inventor: CAMPBELL WILLIAM HENRY
IPC: B30B1/32
Filed: 1967-07-21
Abstract: 1,188,313. Seals. VICKERS Ltd. 10 July, 1968 [21 July, 1967], No. 33785/67. Heading F2B. A pressure vessel for hydrostatic extrusion is sealed around its plug or plunger 4 by an outer ring 6 having a lipped leading end 8 and a conical outer surface which can be wedged into the flared bore of the vessel, and inner sealing ring means 10, 11. The inner sealing ring means consists of a P.T.F.E. friction ring 10 and a rubber back-up ring 11 disposed between an anti-extrusion ring 9 and a metal or rubber retaining sleeve 12. The outer ring 6 is supported in the bore against outward pressure reaction by a supporting structure as described in Specification 1,188,314 and the escape of pressure fluid 3 past the outside of the ring is prevented by the lip 8 which is applied against the bore by the pressure fluid. The bore of the vessel may be provided with a liner made of hard rubber or plastics, the liner being extended, if desired, to replace the retaining sleeve 12.
Patent GB-338210-A (GB)
Abstract: 338,210. Soc. Italiana Pirelli, and Emanueli, L. Aug. 17, 1929. Cable joints.-In order to diminish the flow from oil reservoirs which feed an oil-filled cable so as to limit the loss of oil from an open cable end during laying or repairing or during accidental leakage from the lead sheath, a restrictor, comprising a series of cells and resistances between the cells, is inserted between the reservoirs and the cable lengths to make the drop of pressure proportional to the square of the oil flow. In the construction shown in Fig. 1, bi-concave diaphragms 1, each formed with a hole 2, are arranged side by side in a tube 3, the oil entering by a tube 4 and passing out by a tube 5 so as to pass successively through all the holes 2 in the diaphragms 1. In the construction shown discs 6, 7, 8, 9, 10 are placed side by side. The central disc 8 is thin, and has a series of equidistant small holes 11. The discs 7, 9, one on each side of the disc 8, are thicker, and have a series of larger holes 12. Outer discs 6, 10 enclose the device, the disc 6 having holes for inlet and outlet pipes 4, 5. When the device is assembled, the holes 12 in the disc 7 are in staggered relation with the holes 12 in the disc 9. There are twice as many holes 11 in the disc 8 as there are holes 12 in either disc 7, 9, and a hole 11 is set opposite each hole 12. In the disc 7, in place of one of the holes 12 there are small holes 15 leading to the pipes 4, 5 which are attached to the disc 6. An asssembly bolt 14 passes through a central hole 13 in each disc. The restriotors may be permanently inserted in the tubes connecting the oil feed reservoirs to the terminals and joints of an assembled cable. Specifications 276,986 and 304,912 are referred to.
Patent GB-1520885-A (GB)
Title: Material classifying apparatus
IPC: B07B1/49
Filed: 1975-08-14
Abstract: 1520885 Screening apparatus SIMPLICITY ENG CO 14 Aug 1975 33857/75 Heading B2H  In a vibratory screening apparatus in which a screen 42 is supported by a plurality of spaced elongate rigid members 52 extending transversely underneath the screen, at least some of the members are provided with a metallic shield 90 which is in the form of an inverted trough and serves to protect the member from abrasion by the material passing through the screen. In the embodiment shown, a frame supported by springs 16 and vibrated by means of a rotating eccentric shaft 27, supports two screens 42 and 42' whose edges are clamped by clamps 44 to rails 23 which form a part of the frame. Each screen is supported by a plurality of cylindrical tubes 52 extending between side members of the frame, each of the tubes being protected against the abrasive effects of the material being screened. The tubes 52a nearest the material supply chute 36 are protected by a layer 58 of rubber, Figs. 4 and the remainder of the tubes 52b are protected by a metallic shield 90, Fig. 7 which is welded to rods 96 welded to the tubes. Brackets 70 welded to steel rods 73 or 73a attached to the tubes 52a and the shields 90 respectively support longitudinally extending bars 68 and rails 76 which support the screen. Each screen may be formed of a perforate steel plate 46 covered by a perforate layer 48 of rubber.
Patent GB-491184-A (GB)
Title: Improvements in ring hammer mills
IPC: B02C13/00
Filed: 1937-12-08
Abstract: 491,184. Impact pulverizers. PENNSYLVANIA CRUSHER CO., and HARTSHORN, S. D. Dec. 8, 1937, No. 33983. [Class 59] In an impact pulverizer the pivotal arrangement of beater rings or beater shank on the rotating disc is such that on meeting an obstruction the ring which normally pivots on a rod 42 leaves this pivot and rotates on a pivot 43 nearer the circumference of the disc. The pivots 42, 43 may form part of a cam surface. As shown in Fig. 1 discs 39 are mounted on a rotatable shaft 30 the rings 44 being held on the two rods 42, 43 on the discs. The disc 30 rotates clockwise and when the ring 44 strikes the material it pivots on rod 43 and moves inwardly away from rod 42. The mill casing is provided with a breaker plate 12 and a tramp iron recess 15. The grating 20 comprises bars 19 held at their ends in grooves in curved members 18 pivoted at 21 and adjustable toward the rings by an arm 23 mounted on a shaft 24. The rings may be of various shapes externally and internally and be provided with a toothed circumference. In Fig. 6 the rings are mounted on a cam surface 50 having lateral flanges 50<1>. The rod 42 may comprise the rotatable shaft 30 and in Fig. 14 a pivoted hammer 84 is mounted on a cam 61 fixed to the drive shaft.
Patent GB-1092009-A (GB)
Title: Magnetic ferrite materials
IPC: C04B35/26
Filed: 1963-09-21
Abstract: 1,092,009. Magnetic compositions. K. A. PISKAREV, and M. M. MIKHAILOVA. Dec. 21, 1964 [Sept. 21, 1963], No. 34002/63. Heading H1H. A ferromagnetic ferrite has the composition 50-60 mol. per cent Fe 2 O 3 , 15-50 mol. per cent MnO, 0-30 mol. per cent ZnO, 0À1-0À5 mol. per cent CoO and 0À01-2À0 mol per cent TiO 2 . In preparation, sulphates of the appropriate metals are mixed together and heated to 950 Œ 20‹ C. to form, by decomposition, a mixture of the oxides. This is pressed into shape, sintered at 1200‹ to 1300‹ C., and cooled in an atmosphere in which the partial pressure of oxygen is varied to maintain a constant ferrite composition. As an alternative, the oxide mixture may be formed by directly mixing the appropriate oxides.
Patent GB-1562979-A (GB)
Title: Oral compositions
IPC: A61P1/02
Filed: 1977-08-12
Abstract: An oral hygiene composition contains at least one nitrogen-containing antibacterial plaque-preventing compound from the group consisting of the cationic antibacterial plaque-preventing compounds and long-chain amines having an alkyl radical of 12 to 18 carbon atoms. The oral hygiene composition additionally contains, for reducing stains which are caused by the nitrogen-containing plaque-preventing compound, one or more of the following compounds: water-soluble, quaternary aminoalkylenephosphorus compounds, water-soluble N-methylenephosphonate compounds, phosphoracetic acid or orally tolerable salts thereof and one or more water-soluble phosphorus compounds or an orally tolerable salt of these compounds; the formulae of the said group of compounds are given in Claim 1. The oral hygiene composition described can be used as a powder, paste or liquid preparation.
Patent GB-758707-A (GB)
Title: Process for the production of basic bessemer steel of low nitrogen content
IPC: C21C5/28
Filed: 1954-11-24
Abstract: Basic Bessemer steel of low nitrogen content is produced by blowing the metal during the final stage of dephosphorizing with nitrogen which is substantially free from oxygen.  The metal may be blown with oxygen, the amount of which is increased by 1 per cent for each per cent carbon removed, and finally blown for 0,1 minute with nittogen which may or may not be preheated.  The final slag is stated to contain less iron than the slag normally obtained from the basic Bessemer process.
Patent GB-1269940-A (GB)
Title: Improvements in or relating to fluid pressure-actuated pumping apparatus
IPC: F04B43/06
Filed: 1968-07-17
Abstract: 1,269,940. Cooling protective clothing. PILKINGTON BROS. Ltd., J. J. JAGO, and D. T. ROBERTS. 16 July, 1969 [1 July, 1968], No. 34098/68. Heading F4U. [Also in Divisions F1 and G3] In a closed liquid-circulating cooling system for, e.g. protective clothing, a finned vessel 40 containing a rofrigerant, e.g. solid CO 2 , is surrounded by an outer vessel 38, 39, the liquid coolant, e.g. water passing through the intervening space 43 before circulating through coolant channels in the protective clothing. The water is circulated by a diaphragm pump (see Division F1) controlled by a fluid logic device (see Division G3) which is actuated by the pressure of evaporated CO 2  in the vessel 40 to apply an oscillating fluid pressure to the pump diaphragm 20.
Patent GB-1173728-A (GB)
Title: Phase Contrast Image Projector
IPC: H01S3/107
Filed: 1968-07-17
Abstract: 1,173,728. Lasers. INTERNATIONAL BUSINESS MACHINES CORP. 17 July, 1968 [30 Aug., 1967], No. 34105/68. Heading H1C. A phase contrast image projector comprises a laser active medium 10, Fig. 1, the radiation of which passes through a transparent phase modulating object 14, and is focused by lenses L1, L2 on to small resonator mirrors M1, M2, the object 14 developing both a zero order mode which passes out of the resonator through partially transmitting mirror M1 and side order modes 18A, 18B, 20A, 20B which escape from the resonator by passing outside of the mirror M1. A Babinet compensator 24 in the path of the zero order mode shifts the phase by a selected amount, such as ninety degrees, and the side and zero order modes are converted into parallel rays by a lens L3 and projected on to a viewing screen 22. The phase modulating object may be a thermoplastic screen having a rippled surface 16. In a modification, Fig. 2, the phase modulating object is an electro-optic crystal 30 on which a charge pattern is applied by an electron gun as described in Specification 1,173,727, a Babinet compensator 24 being positioned adjacent mirror Ml to shift the phase of the zero order mode.
Patent GB-876377-A (GB)
Title: Improvements in or relating to cathode ray tube display apparatus
Inventor: HURR ERNEST ROY
IPC: G01R13/22
Filed: 1958-10-24
Abstract: 876,377. Cathode ray oscillographs. BUSH & RANK CINTEL Ltd. Oct. 26, 1959 [Oct. 24, 1958], No. 34108/58. Class 40(7) A cathode-ray tube display apparatus comprises means for producing a long time-base trace by using pairs of cathode ray tubes. A square wave input at 17 appears at the outputs of device 8 as the input and its inverse A, B. One output controls a time-base circuit 7 which gives a symmetrical triangular time-base which is fed to tubes 1-6. The beams are switched on only when traversing from left to right in tubes 1, 3, 5, waveform C, and from right to left in tubes 2, 4, 6, waveform D. On reception of an initiating signal at 28 units 9, 10 send latching signals to gate and clamp circuits 24, 26 and 25, 27, Fig. 3 (not shown). Staircase generators 18, 19 are thus unclamped and generate discrete voltages E, F which periodically and alternately change from one to the next of a succession of values in synchronism with the outputs from device 8. These discrete voltages are mixed in mixer amplifiers 20, 21 with the signals to be displayed, which are obtained from terminal 23 via a phase-splitter 22. The mixed signals pass to the vertical deflection plates. Circuits 11, 13, 15 are primed by voltages G, H, I, respectively and circuits 12, 14, 16 are primed by voltages J, K, L respectively, these voltages being developed under the control of the outputs from device 8 and units 9, 10. The circuits 11-16 give waveforms M-R, respectively, and selectively switch on the electron beams in the tubes 1-6, the stages in units 9, 10 each and successively responding to a complete cycle of the associated staircase generator. Thus the traces for three-step staircase generators appear as discrete time-bases on the faces of tubes 1, 2, 1, 2, 1, 2, 3, 4, 3, 4, 3, 4, 5, 6, 5, 6, 5, 6. When the last time-base has been traced the units 9, 10 emit an unlatching signal which closes their associated gate and clamp circuits 24, 26 and 25, 27. Specification 876,376 is referred to.
Patent GB-889747-A (GB)
Title: A road roller
IPC: E01C19/26
Filed: 1960-10-05
Abstract: 889,747. Road rollers. BOPPARDER MASCHINENBAUGESELLSCHAFT, BOMAG. Oct. 5, 1960 [Oct. 12, 1959], No. 34209/60. Class 6(1). A road roller having four rolls is provided with a motor for driving the two left hand rolls 1a, 2a independently of the two right hand rolls, a separate reversing gear 14 for each pair of rolls being provided to facilitate steering of the roller so that each pair of rolls can be driven forwardly, rearwardly or can run idly independently of the other pair. As shown, the motor 12 and reversing gears 14 are mounted on a frame 9 mounted on top of the chassis frame 5 and supported on the rolls by means of rollers 32. A driving seat 33 is provided and is displaceable laterally on the frame.