baber/WOPTO huggingface dataset:
Patent GB-1248426-A (GB)
Title: Improvements in or relating to circuits employing saturable reactors
Inventor: BISHOP JOHN DANIEL
IPC: H03K17/80
Filed: 1968-10-09
Abstract: 1,248,426. Controlled non-linear inductors. WESTERN ELECTRIC CO. Inc. 9 Oct., 1968 [11 Oct., 1967], No. 47868/68. Heading H3B. In order to suppress A.C. voltages induced in the control winding of a saturable core reactor by the load current a constraining inductor is connected in the control circuit and the control winding and constraining inductor are each formed of an equal plurality of sections, each section having substantially the same number of turns and the sections being connected in a series chain between two control terminals with alternate sections being of the same winding. By arranging the control winding and constraining inductor in sections with appropriate polarities of the individual winding sections the effects of interwinding capacitances are eliminated thereby allowing an increase of the load-current to control-current ratio without causing serious distortion in the load current waveform. The saturable reactor arrangement is used as a constant current source in a driven inverter, Fig. 1, wherein a square-wave drive signal of predetermined frequency is applied from source 11 through load winding sections 30, 31 of reactor 10 transformer 20 to the base-emitter circuits of a transistor bridge-type inverter 12. As a result a square wave current is derived from D.C. source 25 and is supplied to load impedance 26. The load windings 30, 31 of the reactor are wound on respective sections of the cores 40 while the control winding sections 32 to 35 are wound over both sections 40 and the sections 36 to 39 of the constraining inductor are wound on a separate inductor core 41. By arranging the control and inductor winding sections to have the same number of turns and the polarities indicated the A.C. voltage which is induced in a particular control winding section by the load current is cancelled by the voltage drop across the associated constraining inductor winding section and the net A.C. voltage across each pair of winding sections is zero. Thus corresponding points of the respective control winding sections and inductor winding sections have equal A.C. potentials with respect to each other, e.g. at the dot sides and the interwinding capacitance between points of equal A.C. potential are eliminated, Fig. 3 (not shown). In order to optimize the effect winding sections 32 to 35 of the control winding and winding sections 36 to 39 of the inductor are wound directly over each other on their respective cores 40, 41 and also the particular winding sections which are wound above each other have respective corresponding turns wound directly over each other.
Patent GB-994279-A (GB)
Title: Improvements in or relating to helicopters
Inventor: MARTIN PHILIP RAYMOND
IPC: B64C27/54
Filed: 1962-12-20
Abstract: 994,279. Helicopters. MINISTER OF AVIATION. Jan. 7, 1964 [Dec. 20, 1962], No. 48095/62. Headings B7G and B7W. A helicopter has means for reducing the incidence of the rotor blades to a low or zero angle of incidence, which means is operated by movement of the undercarriage on touchdown. In Fig. 1, a rod 13 pivoted to the collective pitch lever 10 at 15 and sliding in guide 14, may abut a stop 16, normally at surface C1, so that the pilot can rapidly lower the collective pitch to the value suitable for autorotation. When starting, however, it is desirable that a lower pitch setting should be available, since only small centrifugal forces are generated, and the lift forces can thus cause excessive flapping. Equally, when on a ship's deck, rolling of the ship may produce a relative wind such as to generate auto-rotation, with consequent undesirable lift. Accordingly, a switch 18 is closed on compression of an undercarriage oleo leg 21a, 21b, which energizes electric servomotor 17 to offer surface C2 to rod 13 and permit a lower pitch setting, and energizes servomotor 19 to move the collective pitch lever 10 to such lower setting. The pilot may disable motors 17 and 19 to make positive incidence available again.
Patent GB-1020743-A (GB)
Title: Method of and tool for use in disconnecting soldered components from electrical circuit units
Inventor: BRUFORD ALBERT
IPC: B23K1/018
Filed: 1963-12-06
Abstract: 1,020,743. Soldering. STANDARD TELEPHONES & CABLES Ltd. Dec. 6, 1963, No. 48259/63. Addition to 946,910. Heading B3R. In disconnecting a wire connecting end of a soldered component from an electrical circuit unit, the solder is melted by applying the nozzle of a heated hollow tool bit adjacent to the molten solder and the solder is drawn into the nozzle as a result of a partial vacuum caused by passage of compressed air across the far end of the bit, most of the solder is sucked into the hollow bit from which it is removed by the air stream and is collected in a suitable receptacle. A tool 8 having a removable nozzle 9 on a bit 11, the nozzle and bit being of copper, copper alloy or stainless steel, is placed on the connecting end 5 of a component lead projecting from a solder cone 7 to melt the solder and compressed air controlled by a manual valve is passed along a tube 12 into which the chamfered end 13 of the hollow bit 11 projects. The flow of air creates a low pressure at the end of the bit 11 and the solder is drawn into the bit and is carried into an exhaust chamber 14 where solder particles are deposited on a baffle plate 15. When the bulk of the solder is removed the air drawn across the joint leaves only a thin film of solder prepared for accepting the replacement component. The tool may unsolder other joints. Multiple tools with devices such as shown provided for each wire may be used but the tube 12, chamber 14 and baffle 15 need not be duplicated. The compressed air may be heated.
Patent GB-1249649-A (GB)
Title: Vapour generator seal arrangement
Inventor: COOPER JACOB
IPC: F22B37/66
Filed: 1968-10-11
Abstract: 1,249,649. Steam generators. FOSTER WHEELER CORP. 11 Oct., 1968 [11 Oct., 1967], No. 48387/68. Heading F4A. A steam or other vapour generator comprises a group of parallel closely-spaced water tubes which define a planar surface, the spaces between the tubes being closed, there being at least one channel member spaced from the wall, the or each channel member having a group of tubes passing through openings in the channel member and seal-welded thereto, there being bars seal-welded to the outside of the wall as seal members extending between the channel member and the bar. In Figs. 1 and 2 the steam generator comprises tubes 16a, 16b forming a lower wall portion and tubes 18a, 18b forming an upper wall portion, alternate tubes being bent outwardly in two spaced horizontal planes so as to define two spaced horizontal planar surfaces 16a, 18b and 16b, 18a, the tubes 16a, 16b extending to a header 20 and the tubes 18a, 18b extending to a header 22. The tubes 16a, 18b extend through the vertical web of a channelsection member 26 and the tubes 16b, 18a similarly extend through the vertical web of a channel section member 24, the tubes being sealwelded to the channel members. L-section seal members 36, 34, Fig. 3, are welded to the flanges of the channel members 26, 24 and the tubes 16a, 16b and 18a, 18b; similarly a channelsection member 38 is welded to the flanges of the channel members 26, 24 and the tubes 16b, 18b whereby the region of entry of the horizontal tubes into the vertical tube wall is sealed. Scalloped bars 44 are secured to the tubes 18a, 18b and 16a, 16b so as to provide smooth surfaces to which the L-section members 36, 34 may be secured by means of flanges 46. Heat insulating material is disposed within the spaces defined by the sealing members and tubes.
Patent GB-1337298-A (GB)
Title: Method and apparatus for the manufacture of elongate concrete building elements
IPC: B28B1/08
Filed: 1971-10-19
Abstract: 1337298 Building elements INGENJORSFIRMAN NILCON AB 19 Oct 1971 [15 Dec 1970] 48470/71 Heading E1B [Also in Divisions B4 and B5] Channel- or T-shaped building elements are moulded from concrete having a water/cement ratio of 0.27-0.35. A channel-shaped element 1 (Figure 10) includes side projections 9 and reinforcing irons 5, 6, 8. The sides of two elements can be interlocked and joined by mortar 61 (Figure 12).
Patent GB-1443295-A (GB)
Title: Method for the preparation of unsaturated dimers of alpha-methyl styrenes or derivatives thereof
IPC: B01J31/00
Filed: 1974-11-08
Abstract: 1443295 Dimersing α-methylstyrenes MITSUI TOATSU CHEMICALS Inc 8 Nov 1974 [9 Nov 1973] 48475/74 Heading C5E Monomers of the Formula (I) wherein R is H or C 1 -C 4  alkyl are dimerized or codimerized to give compounds of the Formula (II) preferentially, at 20-100‹ C. in the presence of a sulphonic acid type cation-exchange resin catalyst and at least one C 2 -C 5  primary or secondary alcohol. The catalyst may be a styrene-divinylbenzene copolymer carrying sulpho groups. Examples describe the dimerization of α-methylstyrene to give 2,4-diphenyl-4- methyl-1-pentene and the codimerization of m- and p-methyl-α-methylstyrenes to give the corresponding 1-pentenes.
Patent GB-1013636-A (GB)
Title: Adjustable spanner
IPC: B25B13/20
Filed: 1963-12-09
Abstract: 1,013,636. Wrenches. J. ALLEGRAUD. Dec. 9, 1963 [Dec. 12, 1962], No. 48510/63. Heading B4W. An adjustable spanner comprises a body 1 having a fixed jaw 1 and a movable jaw 2 slidably mounted in the body and having serrations on its lower surface, means for biasing the movable jaw towards the fixed jaw, a locking member 3 mounted on the body and having a serrated surface complementary to the lower surface of the movable jaw, the member 3 being movable towards and away from the movable jaw 2 so as to engage and disengage the serrated surface of the movable jaw, means biasing the locking member in a retracted position and actuating means including a cam pivoted on the body for moving the locking member towards the movable jaw. As shown in Fig. 1, the actuating lever 4 is integral with the cam 8. A leaf spring having opposite ends engaged respectively with the lever 4 and movable jaw 3, tends to urge the movable jaw in the closing or opening position depending on the direction of rotation of the actuating lever. In a modification, Fig. 5, a tension spring associated with jaws 1, 2 biases the jaw 2 towards its closing position. An arm 10 pivoted coaxially with the actuating lever, has a projecting nose which engages the movable jaw 2 and tends to urge it into open or closed position depending on the direction of rotation of the actuating lever. A pawl 11 is provided for latching the cam and lever in the locking position. In another modification, Fig. 6 (not shown), the actuating linkage includes a pair of toggle links. In another modification the actuating member comprises a member guided for vertical sliding movement on the body and engageable with the cam for rotating it between its locking and releasing positions.
Patent GB-1288404-A (GB)
IPC: B22F7/00
Filed: 1969-10-03
Abstract: 1288404 Making sintered metal filter elements MINNESOTA MINING & MFG CO 3 Oct 1969 [4 Oct 1968] 48785/69 Headings BID and B1T An integral filter disc comprises an impervious central core 11 with protuberences 12, and a pair of porous filtering layers 14, 16 supported by respective layers 19, 21 of greater porosity, these items being all made of sintered metal powder. In manufacture (Fig. 1, not shown) annular discs of 'green' metal powder and organic binder are stacked together, with rings (15, 20) located between the pheripheries of discs 11, 14, 16. These rings are also of powdered metal and wet. The discs are pressed together, deforming the rings to form an integral peripheral seal 27, and the assembly is then sintered. The fine, coarse and medium grades of powder and various metals forming items 11, 21, and 16 respectively are exemplified. A plurality of such discs may be stacked on a filtrate-draining rod (Figs. 4, 5, 6, not shown) and clamped together, with intermediate spacer rings, in a housing (Fig. 7, not shown), which may have external heaters (54). The resulting filter is used for gas or liquid.
Patent GB-1470863-A (GB)
Title: Electrical connectors
IPC: H01R4/24
Filed: 1974-11-14
Abstract: 1470863 Direct connections; two-part couplings AMP Inc 14 Nov 1974 [19 Dec 1973] 49227/74 Heading H2E A connector comprises an insulating housing 2 having a cavity (7, Figs. 2, 3, not shown) for receiving a contact 3 which has a wire-receiving slot 23, an aperture 13 extending between the cavity and an outside surface of the housing in alignment with the slot for passage therethrough of the wire 40, and a stuffer 4 slidable along a channel 17 in the housing to engage a wire passing through the aperture and move it along the slot. The contact 3 is formed from a folded sheet with a slot 23 in each side 20 and an arm 25 which receives against the bight 23 the bared end of a wire 41; as an alternative to the arm a tubular socket (not shown) may be present for receiving a pin on the wire 41. The housing 2 has three apertures 13 extending from opposed sides 6 each with a respective cavity (7) extending into the base 5 of the housing, the sides 6 terminating in respective flanges 15 which together define the channel 17. A hole (12) from each cavity extends through the base to admit the wires 41. The stuffer 4 has a boss which slides along the channel 17, a groove 31 which slides over a row of embossments 10, and a cam surface 34 for moving the wires into the slots. A cutter plate (not shown) may be connected to one side 20 to trim excess wire 41 from its end.
Patent GB-1146129-A (GB)
Title: Primary alkaline cell
IPC: H01M12/06
Filed: 1967-10-30
Abstract: 1,146,129. Ribbed washers in alkaline dry cells. F. K. NABIULLIN, I. I. KOVAL, Z. M. BUZOVA, E. M. GERTSIK, B. V. MARFIN, and V. A. RABINOVICH. 30 Oct., 1967 [29 Oct., 1966], No. 49255/67. Heading H1B. In the primary alkaline cell illustrated contact between the electrodes is prevented by the insulating washers 8 and 9, made, e.g. of polyethylene, situated at the ends of the electrodes and having ribs 10 which project into the thickened electrolyte between the electrodes. The cell is contained in a metal case 1 which functions also as current collector for the positive electrode 2, of Mn0 2 , carbon and electrolyte; the negative electrode 3, of pasted zinc on a tubular metal support 4 is separated from the positive electrode by the thickened electrolyte 5; the metal base of the case contacts the interior of cylinder 4 and sits in the sealing ring 6 which is held by the rolled-in edge of the case.
Patent GB-1126259-A (GB)
Title: New halomethylphosphonic acid bisamides and process for flameproofing cellulosic fibrous material therewith
Inventor: FIKENTSCHER ROLF
IPC: C07F9/6584
Filed: 1966-11-03
Abstract: 1,126,259. Halomethylphosphonic acid bisamides. BADISCHE ANILIN- & SODAFABRIK A.G. 3 Nov., 1966 [4 Nov., 1965], No. 49307/66. Heading C2C. [Also in Division D1] Novel compounds of the formula in which X is Cl or Br and R<SP>1</SP> and R<SP>2</SP> are the same or different and denote hydrogen atoms, unsubstituted C 1 -C 3  alkyl radicals or C 1 -C 3  chloro- or bromo-alkyl radicals or together denote a C 2  or C 3  alkylene radical are obtained by reacting a halomethyl phosphonic acid dichloride with ammonia or with appropriate primary mono-amines or diamines in an inert solvent, e.g. methylene chloride, benzene, dioxane, tetrahydrofuran or ether, in the presence of an excess of ammonia or of the said amines which is sufficient to bind the hydrogen chloride formed in the reaction or in the presence of other acid-binding agents, e.g. tertiary amines. The products are useful for flame-proofing cellulosic fibrous materials.
Patent GB-1496904-A (GB)
Title: Die for label cutting
IPC: B65C9/00
Filed: 1974-12-12
Abstract: 1496904 Cutting apparatus R A JONES & CO Inc 12 Dec 1974 [26 Dec 1973] 49502/75 Divided out of 1496903 Heading B4B [Also in Division B3] A cutting die comprises a die surface 35, and a plurality of cutting edges 36 extending outwardly from the surface to define a shape to be cut from a workpiece, each cutting edge having its ends curved inwardly towards the shape, each curved end being spaced from that of an adjacent cutting edge and having an internal radius of 0À006 to 0À015 inches. Fig. 3 shows a rotary cutting die 12 which co-operates with a plain roller (not shown) to partially cut square shapes in a web of paper or plastics, leaving the squares attached to the rest of the web by tapered bridge pieces, for subsequent removal in a labelling machine. Fig. 9 is a detailed view of the curved ends 63, 64 on adjacent outwardly tapering cutting lands 61, 62, formed by electrical discharge machining. In another embodiment, Fig. 6, the curved ends are formed by V-shaped indentation at 45 of a continuous land 37.
Patent GB-1384220-A (GB)
Title: Circuit assemblies
IPC: H05K7/20
Filed: 1973-10-25
Abstract: 1384220 Circuit assemblies INTERNATIONAL BUSINESS MACHINES CORP 25 Oct 1973 [30 Nov 1972] 49753/73 Heading H1R A circuit assembly comprises an array 30 of spaced apart electrically interconnected laminar substrates 22, 36 each bearing integrated circuits 32, 40, substrate 22 at one end of the array being provided with connection pins 34 over a major proportion of the area of its outer surface, and substrates 36 being provided with interconnection pins 38 only in a marginal portion of their surfaces. The integrated circuits 32 on substrate 22 may be logic circuits requiring a high number of inputs and outputs and short circuit paths, while circuits 40 on substrates 36 may be memory circuits requiring relatively fewer connections and for which a longer circuit path is tolerable. The integrated circuits may comprise individual chips as shown or a single wafer of semi-conductor material. The assembly is mounted in a housing wherein base-plate 14 bolted to the housing has a window which is closed by substrate 20. Cooling fluid circulates within the housing and heat is dissipated by means of internal fins 26 and external fins 28. Instead of fins 28 a liquid jacket may be provided. Plug 48 closing the fluid entry aperture may incorporate a pressure relief valve. Heat sensitive clip 50 may be provided to trigger an alarm should the coolant level fall.
Patent GB-1528988-A (GB)
Title: Deeply embossed sheet product and method and apparatus for the production thereof
IPC: B29C51/08
Filed: 1975-12-06
Abstract: 1528988 Embossing JOHNS-MANVILLE CORP 6 Dec 1975 50135/75 Heading B6J A sheet 75 of material suitable for use in reflective thermal insulation (e.g. stainless steel or aluminium foil 1-5 mils. thick) is embossed in a first step with a pattern of hills not more than 1 cm. in height and intersecting valleys and is deep embossed in a further step with a pattern of protuberances 42 each of which is wider at its base than its apex and has a sufficiently large base to include at least portions of a plurality of the hills, the height of the protuberances being greater than that of the hills. The embossing steps may be carried out by nip roller pairs. The protuberances may be produced by raised portions 48 on rollers 24 and 27 co-operating with depressions 51 on each of the rollers. The hills and protuberances may be provided on one or both sides of the sheet. Fig. 8 shows a thermal insulation panel comprising a casing 78 containing a plurality of sheets 75 interleaved with embossed spacer sheets 77.
Patent GB-1023348-A (GB)
Title: Improvements in pressure joints
Inventor: SPEAKMAN RAYMOND HOLDEN
IPC: F16L17/08
Filed: 1963-12-20
Abstract: 1,023,348. Joint-making packing. IMPERIAL CHEMICAL INDUSTRIES Ltd. Dec. 15, 1964 [Dec. 20, 1963], No. 50361/63. Heading F2B. A pressure tight joint between two members 7, 8 is made by a deformable sealing ring 9 which is permanently deformed by the pressure of the sealed fluid and is coated, at least on the areas where it contacts the members 7, 8, with a material 10 having a lower yield strength than that of the material of the sealing ring 9. The coating may be metallic, e.g. copper, lead or silver or synthetic resin, e.g. polytetrafluoroethylene or silicone rubber and the sealing ring may be of steel coated with copper or of aluminium coated with polytetrafluoroethylene.
Patent GB-1034769-A (GB)
Title: Device for measuring the intraocular pressure of an eyeball
IPC: A61B3/16
Filed: 1964-12-10
Abstract: 1,034,769. Tonometers. COMPUTER INSTRUMENTS CORPORATION. Dec. 10, 1964 [Dec. 16, 1963], No. 50406/64. Heading A5K. A tonometer comprises nosepiece 21 in which plunger 48 is slidably mounted. The nosepiece 21 is connected to elongated casing 57 or to a base 73 having a finger slip 14 attached thereto, see Fig. 10, not shown. The nosepiece may be covered with cover 62. The chamber 45 in nosepiece 21 is connected via ducts 46 and 58 to an air pump (not shown) and via ducts 46 and 59 and a valve arrangement to a pressure gauge (not shown). When the nosepiece is not in contact with the eyeball the pressurized air acts on head 50 of plunger 48 to extend its tip 49 from the aperture in the wall 44 of the nosepiece 21,the air being vented to the atmosphere via ports 51-54 and ports 63-68 (only 64, 67 shown). When the wall 44 is placed against the eyeball the plunger 48 is moved such that its head 50 closes the duct 46. The pressure in duct 46 increases continually until the resistance on the plunger 48 due to the intraocular pressure of the eye, is overcome and the head 50 of plunger moves from duct 46. This pressure is recorded on the pressure gauge and gives an indication of the intraocular pressure of the eye.
Patent GB-1508667-A (GB)
Title: Dash-pot assemblies for use with passenger restraining systems in vehicles
IPC: B60R21/01
Filed: 1975-12-09
Abstract: 1508667 Combined hydraulic damper and sensor unit BAYERISCHE MOTOREN WERKE AG 9 Dec 1975 [29 Jan 1975] 50469/75 Heading F2S A combined damper/sensor unit, for mounting a vehicle bumper and triggering air bags in the event of a crash, comprises an outer cylinder 2, an inner cylinder 3, a piston 5 slidable in the inner cylinder to define a pressure fluid chamber 76, throttle means 8 to control exit of fluid from the chamber and thereby damp the piston movement, and a housing coaxial with the inner cylinder and containing a sensor 10 including an electrical switch operable in response to a predetermined fluid pressure in the chamber 7. The switch has a movable contact 41 biased away from a fixed contact 46 by a spring 42 and moved into contact with it by fluid pressure in the chamber 7 acting on an adjacent diaphragm. Other constrictions of sensor and switch are given (Figs. 2-7, not shown). In case of liquid leakage, the switch can be operated mechanically by an extension 23 of the piston.
Patent GB-1409472-A (GB)
Title: Ram for a blowout preventer
IPC: E21B29/08
Filed: 1973-06-14
Abstract: 1409472 Wells &c CAMERON IRON WORKS Inc 14 June 1973 [16 June 1972] 50962/74 Divided out of 1409471 Heading E1F The subject matter of the Specification is substantially the same as that disclosed in Specifications 1409471, 1409473 but the claims are directed to a blow-out preventer ram having a cutting edge for shearing drill pipe and means for mounting a seal for engagement with an opposing ram.
Patent GB-1124819-A (GB)
Title: Improvements in or relating to appliances such as vacuum cleaners
IPC: A47L9/26
Filed: 1965-12-03
Abstract: 1,124,819. Carrying handles; suction cleaners. ELEKTRO-PRAGA HLINSKO NARODNI PODNIK. 3 Dec., 1965 [4 Dec., 1964], No. 51381/65. Headings A4F and A4G. The handle of e.g. a vacuum cleaner has cleats at each end on which the lead may be coiled, at least one pivoting towards the other for releasing the lead and being formed as a frame having portions sliding upwardly in a handle groove before pivoting.