baber/WOPTO huggingface dataset:
Patent GB-1078715-A (GB)
Title: Method and apparatus for manufacturing hydrogel contact lenses
Inventor: WICHTERLE OTTO
IPC: B29C41/04
Filed: 1964-09-07
Abstract: 1,078,715. Moulding contact lenses. CESKOSLOVENSKA AKADAMIE VED. Sept. 7, 1964 [Sept. 11, 1963], No. 36530/64. Heading B5A. A contact lens is moulded from a liquid monomer mixture in a rotating mould which has a sharp edge corresponding to the border of the lens. The mixture may be raised to the edge by the rotational speed of the mould and thereafter the speed reduced during the formation of the remainder of the lens. The optical qualities of the lens may be altered by moving the axis of rotation relative to the mould axis. As shown in Fig. 1 the sharp edge 2 forms part of a circular groove cut into the mould 1 which is formed of a chemically resistant, inert metal. In another embodiment, Fig. 2 (not shown), the sharp edge is formed in a glass mould by pressing a heated metal die into the mould, or the mould may be formed by vacuum moulding of a heat-plastified glass. In a further embodiment, Fig. 3 (not shown), the mould is pressed into a jacket and secured by cement. The mould and jacket may be formed by machining a single piece of non-rusting steel or steel alloy. The mould may be formed of such materials as molten quartz, heavily crossedlinked plastics, or titanium or alloys thereof. Metallic moulds may be coated with galvanic or other coatings of chromium or other inert metal. Suitable starting materials for the mixture are esters of glycols with polymerizable unsaturated acids such as acrylic and methacrylic acid or with itaconic, maleic, and fumaric acids, the main component being a monoester and the cross-linking agent a diester. Ionogenic gels with their acid or basic groups neutralized may also be used, as may a mixture of ethylene glycol monomethacrylate, diethyleneglycol methacrylate, and ethylene glycol bis-methacrylate, the finished hydrogel being neutralized in a sodium bicarbonate solution. Other suitable starting materials are polyvinyl alcohol crosslinked with glyoxal, and esters of saturated hydroxy acids.
Patent GB-411774-A (GB)
Title: Improvements relating to power transmission chains
IPC: F16G13/04
Filed: 1933-12-29
Abstract: 411,774. Driving - chains. MORSE CHAIN CO., Ltd., The Chaineries, Letchworth, Hertfordshire.-(Assignees of Perry, D. B. ; Ithaca, New York, U.S.A.) Dec. 29, 1933, No. 36595. Convention date, March 6. [Class 24.] In power transmission chains of the " silent " type, the co-operating links 6, 7, are provided at each joint with apertures having a concave bearing surface 12 and a double concave seating surface 13, 14, and a single joint pin 9 of oval section makes sliding contact with the surface 12 and seats alternately in the surfaces 13, 14 during the bending of the chain. To prevent sagging of the chain the major axis of the apertures of each link converge towards the inside of the chain, so that on a straight run the joint pin is seated in the upper surfaces 13. The amount of permissible sagging is controlled by the degree of convergence provided and, in the case of chains which are required to drive on both faces, the major axes of the apertures are parallel.
Patent GB-1530801-A (GB)
Title: Double heterostructure semiconductor optical devices
IPC: G02B6/122
Filed: 1975-09-05
Abstract: 1530801 Semiconductor lasers WESTERN ELECTRIC CO Inc 5 Sept 1975 [11 March 1975] 36603/75 Headings H1K and H1C Radiation which is generated in a layer 16 of a heterostructure optical device is coupled to an adjacent waveguide layer 14 via a taper 16À1 before emerging through a surface 24. The heterostructure is fabricated by epitaxially growing on a GaAs substrate 10 a wide bandgap P (or N) type layer 12, a P (or N) layer 14 having a bandgap less than layer 12, a P (or N) layer 16 having a bandgap less than layer 14, and an N (or P) type layer 18 having a wider bandgap than layer 14. Formation of the taper 16À1 is achieved by modifying the local growth rate of layer 16 using a mask adjustably spaced from substrate 10. A thickened zone 14À1, which reduces radiation beam divergence at surface 24, may also be formed by the use of an adjustably spaced partition above the substrate 10 during growth of layer 14. In another embodiment, layer 16 may have a second layer terminating short of the face 26. Also, a laser-modulator combination, Fig. 3 (not shown) may be fabricated by terminating layer 16 short of a groove 19 in layer 18. Either liquid phase epitaxy or molecular beam epitaxy may be used to grow the heterostructure. Reference is made to Specifications 1,270,550, 1,406,496 and 1,513,313.
Patent GB-1496057-A (GB)
Title: In-line type electron gun assembly for use in multibeam type colour picture tubes
IPC: H01J29/50
Filed: 1975-09-06
Abstract: 1496057 Electron guns HITACHI Ltd 6 Sept 1975 36793/75 Heading H1D In an in-line type electron gun assembly for a multi-beam colour tube in which the grid electrodes constituting a main lens of respective electron guns are formed as an integral structure, the composite grid structure comprises two electrode members 40, 41 formed from flat plates, Figs. 4 and 5, each being provided with three in-line and corresponding aligned openings 43a, 43b, 43c and 46a, 46b, 46c, each end opening of one electrode member, e.g. 40, having relatively long sleeves 44a, 44c and the central opening of the other member (41) having a similar oppositely directed relatively long sleeve 47b such that when the members 40, 41 are mounted together the sleeves intermesh, as shown in Fig. 3. The remaining openings of both members 40, 41 may be left plain or may, as shown, be provided with relatively short sleeves 44b, 47a, 47c which when the grid is assembled either contact the opposed long sleeves or are slightly spaced therefrom. The electrode members may be welded together at their flanges or relatively supported from a glass bead.
Patent GB-1056154-A (GB)
Title: Improvements relating to camera shutters
IPC: G03B7/083
Filed: 1964-03-26
Abstract: 1,056,154. Cameras; shatter mechanisms. INTERNATIONAL POLAROID CORPORATION. March 26, 1964 [March 29, 1963], No. 36898/66. Divided out of 1, 056,153. Heading G2A. The Specification relates to the shutter mechanism as disclosed in the parent Specification, the claims being directed to the rounded form of one of the engaging surfaces of the solenoid core and the keeper which provides a line contact between these surfaces to ensure quick release of the keeper when the solenoid is de-energized.
Patent GB-988654-A (GB)
Title: Improvements in or relating to blast guns for cleaning tubes
IPC: B08B9/032
Filed: 1963-09-19
Abstract: 988,654. Tube cleaning devices. PRVNI BRNENSKA STROJIRNA ZAVODY KLEMENTA GOTTWALDA NARODNI PODNIK. Sept. 19, 1963 [Sept. 20, 1962], No. 36956/63. Heading F2N. A blast gun in which cleaning fluid such as water is carried by air under pressure and in which a device is employed for producing a continuous emission of pulses, there being a stop valve in the main line connected to a piston 1 reciprocable inside a cylinder 2 closed at one end, the gun comprises the combination of a device for the delivery of water under pressure with a pulse producing device for intermittent delivery of air, the cylinder 2 being provided with at least one radial bore connected to an outlet passage 14 provided with a control valve 6 for changing the cross-section of the passage. As shown, a sleeve 21, when inerted in a tube 22, is moved rearwardly against the action of a spring 27 to bring passages 24, 25 into register and allow water to flow therethrough for discharge from a nozzle 19 and into the tube. Pulling a trigger 17 allows air under pressure to pass into the chamber 8 and through a passage 9 to move the piston 1 rearwardly and open the valve 20 against the action of a spring 15. Blasts of air passing to the nozzle 19 causes plugs of water to be formed. The piston is reciprocated by the alternate admission of air to the passage 9 and exhausting of the air through the passages 12 and outlet 14.
Patent GB-964087-A (GB)
Title: A device for the control of machine tools from a drawing or from a model,in particular by means of an intermediate recording
IPC: G05B19/42
Filed: 1960-10-28
Abstract: 964,087. Photo-electric curve following apparatus. CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE. Oct. 28, 1960 [Nov. 3, 1959], No. 37079/60. Heading H4D. To control the movement of a machine tool member, either directly or by the intermediary of a recording, a light source 4, Fig. 1, is moved manually around a plane curve 2 mapping the contour of the desired movement and the light is focused on two photo-cells such as 11, Fig. 2, one in each of two chambers 7x and 7y. In each chamber is an endless tape 13 moving at constant speed in front of the cell, the tape being ruled with alternate opaque and transparent parallel transverse zones, and the two tapes are moved at right angles to one another so as to produce from the respective photo-cells pulsating signals. Movement of the source 4 results in frequency modulation of these signals so that from the cell in 7x are produced f.m. signals indicative of movement in the X direction whilst from the cell in 7y the frequency modulation is dependent on movement in the Y direction, an increase or decrease in either indicating the sense of the movement. There are also described with reference to Figs. 3 and 4 (not shown), means of compensating for mechanical wear in the system and for intentional movement of the table 1 to accommodate a curve 2 larger than the fields of view of lenses 10x and 10y in the chamber 7x and 7y. Specification 887,229 is referred to.
Patent GB-1397777-A (GB)
Title: Protection means for electric power converters
IPC: H02P23/00
Filed: 1972-08-09
Abstract: 1397777 Protecting converters GENERAL ELECTRIC CO 9 Aug 1972 [16 Aug 1971] 37088/72 Heading H2F [Also in Division H3] A converter has a first circuit 74 responsive to a converter parameter exceeding a first predetermined limit and a second circuit 80 responsive to the parameter being less than a second predetermined limit and a third circuit 90 responsive to outputs from circuits 74 and 80 to provide a signal for stopping operation of the converter under such fault conditions. Fig. 1 (not shown), relates to a three-phase inverter of the type described in Specification 1,362,849 supply power to an A.C. motor. Inverse diodes are provided for returning regenerative energy from the A.C. motor to the D.C. side. This may result in the smoothing capacitor charging to an excessive voltage. The voltage on the D.C. side is reduced by a potential divider 104, 106 and feeds an inverting input of amplifier 100. Under normal conditions, this will result in the input at 102 being negative so that the resulting positive output will maintain transistor 150 conductive. Excessive voltage on the D.C. side will cause a negative output from amplifier 100 which will turn off transistor 150, turning on transistor 164 and providing a signal at 57 which inhibits the triggering pulses for the inverting thyristors or thyratrons. If the voltage is below predetermined limits, transistor 120 is turned off, turning on transistor 132 and providing a similar signal at 57. Capacitor 160 prevents unwanted turn-off due to transients. Alternatively, the inverter may be turned off in response to over- or under-current.
Patent GB-509992-A (GB)
Title: Improvements in or relating to screw-shaped dividers for reaping machines
IPC: A01D63/02
Filed: 1938-12-21
Abstract: 509,992. Reaping-machines. SAVARY, A. Dec. 21, 1938, No. 37135. [Glass 6 (iii)] A rotary screw-shaped divider 6 has the threads of the screw provided with unequal flanks, the longer one 6a extending at an acute angle to the axis of the screw and the shorter being approximately at right angles to the longer. The edges of the threads may be rounded and the screw is preferably double threaded. At the rear of the divider a conical drum 10, provided with staggered humps 11, is arranged. The divider may be of wood, composed of two pressed or cast parts or of sheetmetal strips twisted and welded together.
Patent GB-1159690-A (GB)
Title: Silver Dye Bleach process and materials
IPC: G03C7/28
Filed: 1966-08-19
Abstract: 1,159,690. Silver dye bleach materials. EASTMAN KODAK CO. Aug. 19, 1966 [Aug. 19, 1965; April 22, 1966], No.37232/66. Heading G2C. A silver dye bleach material comprises a silver halide emulsion layer, a bleachable dye either in said layer or in a layer contiguous therewith and a layer containing a substance which will inhibit the diffusion in the material of the reduction products of a silver dye bleach catalyst formed on oxidation of developed silver by the catalyst said substance having a half-wave potential greater than -0À10 volts and being itself non-diffusing in said layer. The diffusioninhibiting substance may be present in an emulsion layer, a bleachable dye layer or an interlayer and a dye bleach catalyst may be present in an emulsion layer or a layer adjacent thereto. The diffusion inhibiting substances specified are ballasted p-quinones and many are listed. Specified dye bleach catalysts are phenazines, pyrazines, quinoxalines and pteridines.
Patent GB-1011593-A (GB)
Title: Improved iron ore pellet and process for the production thereof
IPC: C22B1/24
Filed: 1962-10-02
Abstract: <PICT:1011593/C1/1> A self-fluxing pellet is produced by kilning a pellet comprising a core of flux material, e.g. compounds of Ca or Mg, free of iron ore, surrounded by iron ore free of flux.  Flux in hopper 1, ground to 200 mesh, is funnelled on to conveyer 2 and delivered to drum 3, where it is sprayed with water from 4, and forms into balls which roll down the rotating drum. Screening device 5 delivers cores of diameter 1/4 inch, via conveyer 6, to drum 10. Iron ore from 11 and water from 15 are introduced along the length of the drum, and the resulting ore-coated pellets, containing 8% flux to 92% ore, are screened at 17 to 1/2 -inch diameter and delivered to furnace 20.  Conveyer 31 carries the pellets through drying zones 24 and 25, where, at 500-900 DEG  F., water vapour escapes through, but does not fracture, the coating and into preburning zone 26 where any magnetite in the ore is oxidized at 1600-1800 DEG  F. to haematite, and bridging of grains of haematite is initiated.  Pellets are then tumbled through zone 28 at 2200-2400 DEG  F. within kiln 27 to produce a continuous network of haematite in the coating, and cooled in an upward-flowing air stream in 33.  The zones are heated by gases from burner 40 which proceed downward through 26 and 25, upwards through 24, and are exhausted at 46.  Loss of CO2 in zone 26 causes the flux core to shrink and break contact with the ore, thus preventing formation of slag in zone 28.  Specification 835,981 is referred to.
Patent GB-449622-A (GB)
Title: Improvements in and relating to prepayment mechanism for meters
IPC: G07F15/02
Filed: 1934-12-31
Abstract: 449,622. Prepayment mechanism for meters. ALDER & MACKAY, Ltd., and PEET, A., New Grange Works, Stewart Terrace, Edinburgh. Dec. 31,1934, No. 37418. [Class 27] Coin action, thrust with delivery proportionate to value of coin.-A rotary coin pocket assembly for prepayment meters for optional use with either of two coins, comprises spaced para]]el plates 10 extending completely across the carrier plate 8, turning with the handle 1, and divided into separate compartments for the two coins by a slide 11 carrying striker elements 16, 17 for selectively engaging the quantity wheels 18, 19. In operation, either compartment is brought into register with a single insertion slot 4 in the price-change plate 7, correct registration being shown by either of two indicating plates 2, 3 turning with the pocket lying adjacent to the slot. Each compartment has associated with it a spring retracted lever 23 having a pin 27 adapted to be engaged by an inserted coin to cause an abutment 31 on the lever to engage a fixed stop 33 adjacent the discharge opening 34 in the drum 5, so as to prevent over-running of the coin pocket. The slide 11 is located in its normal position by the engagement of a spring- pressed plunger 22 with a cam slot 20 in the slide. The operating handle 1 may incorporate the one-way drive described in Specification 446,177. A spring 35 is provided in the compartment for the larger coin to eject a small coin accidentally inserted. Coin-slit closing-devices. The Provisional Specification describes also a cut-off plate, turning with the handle 1, and having two slots of different size adapted to mask the insertion slot to suit the coin appropriate to the compartment registering therewith.
Patent GB-619711-A (GB)
Title: Improvements in endless conveyors
IPC: B65G47/82
Filed: 1946-12-19
Abstract: 619,711. Discharging devices for endless conveyers. SPRIGGS, W. A. Dec. 19, 1946, No. 37456. [Class 78 (i)] Discharging means for an endless belt conveyer or for a conveyer comprising an endless series of trays as described in Specification 325,571, [Class 78 (i)], comprises an actuating device which is intermittently connected to be moved by the conveyer during which movement it stores energy, the device being then connected to move a pusher member horizontally across the conveyer, and being automatically disconnected at the end of this movement so that independent means return the pusher member. The pusher member 10 is carried on a rod 11 guided by a head 12 between a pair of horizontal rails 13 extending at right angles to a horizontal portion of the conveyer and is normally retracted by a spring 14. A carriage 15 sliding on the rails 13 is moved by a bell-crank lever 16, pivoted at 17 and biassed by a spring 25 so that one arm 21 lies in the path of projections on the conveyer which each move the bell-crank to extend the spring 25 until the projection moves far enough to release the arm 21. As the bell-crank lever nears the end of its travel with the conveyer a plate 27 sliding in vertical guides 26 on the carriage 15 is raised by a ramp 29 on the retracted pusher head 12 and, as the arm 21 of the bell-crank is released, falls behind a vertical edge on the ramp so that as the bell-crank is returned by the spring 25, the carriage 15 moves the pusher 10 across the conveyer. At the end of this outward stroke laterally projecting arms 28 on the plate 27 engage ramps 30 on the rails 13 to raise the plate and permit the pusher 10 to be returned by the spring 14. The arm 21 has an extension 36 slidable between bent-over ears 37 so that it may be withdrawn from the path of the projections on the conveyer: a pin 38 passing through holes in the extension and the arm normally holds the extension in position.
Patent GB-1076607-A (GB)
Title: Therapeutic compositions comprising adenylic nucleotides and digitalis preparations
IPC: A61K31/704
Filed: 1964-09-15
Abstract: Pharmaceutical compositions for the treatment of cardiac disorders comprise a digitalis preparation, which is whole-leaf digitalis or a purified cardiac glycoside derivative thereof, and an adenylic nucleotide, together with a pharmaceutical carrier. Specified adenylic nucleotides include cyclic adenosine-(2\sv,3\sv)-monophosphate, cyclic adenosine-(3\sv,5\sv)-monophosphate adenosine diphosphate, adenosine triphosphate, nicotinamide adenylate, procaine adenylate and iron adenylate.  The digitalis preparation may be digoxin. The compositions may be administered orally, sublingually, parenterally or rectally.
Patent GB-850376-A (GB)
Title: Roachicidal composition
IPC: A01N25/00
Filed: 1956-12-10
Abstract: Pesticidal composition comprises bran, e.g. rice bran, a carbohydrate powder, e.g. dog-tooth violet starch, scorched barley flour or starch, a proteinaceous powder, e.g. a pupa flour, ground fish bone or ground meat, and benzene hexachloride preferably gamma benzene hexa-chloride preferably in the proportion of 1,5%.
Patent GB-852449-A (GB)
Title: Improvements in and relating to textile drafting machines
IPC: D01H5/74
Filed: 1958-11-26
Abstract: 852,449. Textile drafting arrangements. SCHLUMBERGER & CIE, N. Nov. 26, 1958 [March 7, 1958], No. 38074/58. Class 120(2). In a drafting mechanism at least one of each pair of drafting components has transverse fluting teeth spaced so that the ratio of the width a of a groove to the width b of a tooth is at least 3À5 and the pitch a + b is at least 3mm. The grooves may be rectilinear or helical. The components are rollers and/or aprons and may be used in conjunction with a gill box, aprons or porcupine rollers, or in a multizone system.
Patent GB-1368016-A (GB)
Title: Seat mounting arrangements of motor vehicles
IPC: B60N2/06
Filed: 1972-08-16
Abstract: 1368016 Safety vehicle seats DAIMLERBENZ AG 16 Aug 1972 [17 Aug 1971] 38285/72 Heading A4J  A vehicle seat 1 which is slidably adjustable in the fore and aft direction is mounted for sliding movement in the event of a crash by fixing the lower guide 7 of a two part seat slide 2 to a first L-shaped member 6 connected to a second L-shaped member 11 which is fixed to the vehicle floor, the connection between the two L-shaped members being effected by adjustable clamps 9 each passing through a hole 19 in member 11 and the centre of a slit 20 in member 6 such that when a predetermined loading on the seat is exceeded, the seat is guided in forward or rearward sliding by movement of the clamps in the slits. Each clamp comprises a bolt 14 having an enlarged head 17 and a collar 18 and a stack of cup springs 22 which exert a clamping force on the two L-shaped members. Each slit has enlarged ends 21 having a width equal in diameter to the collar 18. When the shank 16 reaches the end of the slit the collar is pulled into the end by the loading of the cup springs thereby anchoring the seat in position. Energy produced in rearward sliding may be absorbed by making the width of part of the rear portion of the slit less than the diameter of the shank. Forward sliding of the seat prevents an occupant falling between the seat and instrument panel in a crash.
Patent GB-1529378-A (GB)
Title: Thermosetting resin and its production and use
IPC: C08F16/00
Filed: 1976-09-17
Abstract: 1529378 Unsaturated ampho-ion compounds NIPPON PAINT CO Ltd 17 Sept 1976 [24 June 1976] 38595/76 Heading C2C [Also in Division C3]  Compounds of the general Formula (I) wherein R 1  is hydrogen or methyl, R 2  and R 3  are each independently alkyl (C 1-6 ), A is -O- or -NH-, m, and n, are each independently 1-12 and X- is SO 3 -, SO 4 -, or CO 2 - are prepared by reacting the appropriate aminoalkyl acrylate or methacrylate with a sultone or lactone. In specific examples 3-dimethyl- (methacryloylethyl) ammonium propane-sulphonate and 3-dimethyl(methacryloylethyl)- ammonium ethanecarboxylate are prepared by reacting N,N-dimethylaminoethyl methacrylate with respectively 1,3-propanesultone or ppropiolactone.
Patent GB-856308-A (GB)
Title: A new or improved transportable work feeding appliance for use in conjunction with machine tools
IPC: B23Q1/58
Filed: 1957-12-13
Abstract: 856,308. Machine-tool details. ANWYL, E. Dec. 12, 1958 [Dec. 13, 1957], No. 38725/57. Class 83 (3). An attachment for drilling or milling- machines or lathes, comprises fluid-operated means for traversing a work-table 11 at feed and rapid-traverse-speeds. One lug 112 on the base of the table is connected to the piston-rod of a rapid-traverse air-controlled device 122 operated manually, and another lug 113 slides along the rod 151 of a fluid dash-pot device 153 having a manually-adjustable control valve. A collar 161 and nuts 162 on the rod 151 control the point at which the feed-speed is introduced. Feed ceases and the table is returned when a dog 115 on the table actuates a valve 18.