baber/WOPTO huggingface dataset:
Patent GB-1258587-A (GB)
IPC: H01G9/10
Filed: 1969-04-02
Abstract: 1,258,587. Electrolytic capacitors. INTERNATIONAL STANDARD ELECTRIC CORP. 2 April, 1969 [10 April, 1968], No. 17326/69. Heading H1M. A terminal and closure arrangement for a wet electrolytic capacitor comprises a cylindrical metal terminal 1 occupying all but a marginal portion of the end opening of the metal housing, the top end of the terminal being of reduced diameter, a p.t.f.e. sleeve 3 encompassing the larger diameter portion and extending round the bottom edge of the terminal, indentation 9 in the housing providing a seating for sleeve 3 and indentation 8 pressing the sleeve into circumferential groove 7 in the terminal, the rim of the housing being spun over rubber washer 4 sitting on the top of the larger diameter portion and the p.t.f.e. sleeve. Preferably, as shown, the p.t.f.e. sleeve is of reduced thickness where it is pressed into groove 7 and rubber washers 10 and 11 are disposed in the groove and about the sleeve respectively.
Patent GB-1258907-A (GB)
IPC: F16B12/10
Filed: 1968-04-23
Abstract: 1,258,907. Hangers for sliding doors. SWISH PRODUCTS Ltd. 22 April, 1969 [23 April, 1968], No. 19071/68. Heading E1J. A slide fitting comprises a member 10 mountable on a panel, and a member 11 having a T-section head 15 slidable in a channel-section track, the members being relatively adjustable vertically and lockable together. Slide member 11 contains a slot 13 having bevelled side faces 16 with lateral ridges. Mounting member 10 is of complementary shape to, but shorter than the slot 13, and also has lateral ridges. Member 11 is placed against an end face of a panel, member 10 inserted in the slot and loosely secured to the panel by a screw through bore 19, the screw being tightened after vertical adjustment of member 10. In Figs. 3-6 (not shown) a slide member 211 is adjustable in a slot in a cylindrical member 210 engaged in a bore in a panel.
Patent GB-1259047-A (GB)
IPC: H01B17/30
Filed: 1970-03-26
Abstract: 1,259,047. Zone-melting. SIEMENS A.G. 26 MARCH, 1970 [29 March, 1969], No. 14711/ 70. Heading BIS. [Also in Division H2] The electrical power supply to the heating means in a gas-filled or evacuated treatment vessel of a zone melting apparatus consists of two conductors insulated from one another and passed through an aperture in the wall of the vessel, the insulating material having a shore hardness of from 10 to 100 and an extensibility of at least 20%, there being a gastight adhesive connection between the conductors and the insulating material. These conductors can be two wires (Fig. 2), in which case the aperture is filled in with the insulating material to seal it, or they can be coaxial tubes 26, 27, in which a plug 29 of insulating material seals the inner tube and insulating material 24 seals the aperture, which material can be replaced by a sealing ring if axial movement of the power supply means is desired. Cold vulcanised silicone rubber is given as an example of an insulator, adhesive gas-tight seals being by silicone resin. The heating means may be such as induction heating.
Patent GB-1259174-A (GB)
IPC: H01S3/098
Filed: 1969-05-08
Abstract: 1,259,174. Lasers. WESTERN ELECTRIC CO. Inc. 8 May, 1969 [13 May, 1968], No. 23530/69. Heading H1C. Transverse mode locking and beam scanning is achieved in a laser by phase or loss modulating the laser beam at a frequency equal to the transverse mode separation frequency. In a first embodiment, Fig. 2A. the laser beam is loss modulated the modulator 10 comprising a KDP crystal 12 in combination with calcite prism polarizer 14 and prism 18 to reduce reflection loss. In operation a pair of voltages 180 degrees out of phase with one another are applied across opposite faces of crystal 12, Fig. 2C (not shown), at a frequency equal to the transverse mode separation frequency of oscillations from active medium 24 in cavity 20, 22 thus creating a transverse gradient of phase optical loss retardation in the cavity which varies in time at the transverse mode separation frequency. The variation in phase retardation produces variations in the polarizations of the light beam passing through the crystal 12 so that those portions of the light beam which have had their polarization rotated experience loss, when passed through polarizer 14, and the beam will pass through those portions of the crystal exhibiting minimum loss. Thus a longitudinally extending tubular region of energy is formed which oscillates transversely in step with the perturbation and a spot scans the output mirror 22. Retardation plate 17 provides that negative and positive fields produce unequal losses at the top and bottom of the crystal. In an alternative arrangement the scanning is produced by a phase modulator, Fig. 3B (not shown) which comprises a KDP crystal across opposite faces of which a pair of voltages 180 degrees out of phase are applied. The effect of the electric field is to produce variations in the index of refraction in the crystal and hence produce variations in optical path length through the crystal resulting in the beam being tilted. The field is again varied at the transverse mode separation frequency and the resonator made to be close-to-concentric to achieve transverse mode locking and short enough so that only a single longitudinal mode is permitted to oscillate. By using a pair of modulators, Fig. 3A, transverse mode locking of a narrow tubular region or beam which scans in one direction on mirror 36 and in the opposite direction on mirror 38 results. By using a long modulator, Fig. 4 (not shown), disposed in a close-to-concentric cavity so that the ends of the modulator are at the confocal parameter points then the beam scans on both cavity mirrors in the same direction. The modulator may be in the form of a pair of triangularly shaped crystals Fig. 5A (not shown).
Patent GB-1266512-A (GB)
IPC: G05D16/10
Filed: 1969-05-12
Abstract: 1,266,512. Valves. ANDERSON, GREENWOOD & CO. 12 May, 1969 [6 Feb., 1969], No. 41846/71. Divided out of 1,266,511. Heading F2V. [Also in Division G3] The valve described by the present Specification is also described in Specification 1,266,511.
Patent GB-1290179-A (GB)
IPC: C03B33/04
Filed: 1969-09-18
Abstract: 1290179 Cutting and grinding lenses WERNICKE & CO KG 18 Sept 1969 46109/69 Heading C1M A method of forming the periphery of a lens includes the step of making one or more pairs of parallel cuts in a crude lens to remove an edge portion directly or by subsequent breaking along the cuts, followed by removing further edge portions by grinding. The pair of cuts are arranged parallel to the longest diagonal of the lens. A second pair of cuts may be made at right angles to the first. Apparatus for cutting a lens during the mass production thereof includes a moving belt having projections 3 arranged in pairs across the belt to support the unformed lens R, and above the belt two variably spaced cutting devices 5. For small scale production an unformed lens R is placed on a stationary support 10; the variably spaced cutting tools being mounted on a shaft 18 mounted on two pivoted levers 13. The cuts are made by moving the levers 13 in direction Z and pressing the tools 21 against the lens by a lever 19.
Patent GB-1290584-A (GB)
IPC: H02P7/29
Filed: 1970-06-11
Abstract: 1290584 Commutating thyristors TOKYO SHIBAURA ELECTRIC CO Ltd 11 June 1970 28388/70 Heading H3T [Also in Division H2] In a chopper circuit for a series traction motor 10, a single commutating capacitor 23 is initially charged through thyristors 17, 20, reactor 22 and the motor until the capacitor voltage becomes equal to that of the source 13. A main thyristor 15 is then gated-on to supply power current through a reactor 21, the thyristor 15 being quenched when capacitor 23 discharges through thyristors 19 and 18. Simultaneously the capacitor 23 is charged in the reverse direction until its voltage equals the difference between the source voltage and the back electromotive force of the motor, whereupon the thyristors 18, 19, are turned-off automatically. The motor is then supplied through a main thyristor 16 until it is quenched through the auxiliary thyristors 17 and 20 to complete one cycle of operation. The motor is supplied with the full source voltage when the thyristors 15, 16 are bothconductive continuously. Capacitor 23 is then charged through thyristor 17 and impedance element 26 so that the chopper circuit is prepared for re-starting after a power operation. In another arrangement, two more main thyristors and smoothing reactors are provided as well as a pair of auxiliary thyristors for charging and discharging the commutating capacitor, Fig. 2 (not shown). A clamping diode may be connected in series with capacitor 23 and element 26 to protect the thyristor 17 against overvoltage, Fig. 3 (not shown). In an arrangement for regenerative braking, the motor 100 initially provides a small voltage due to residual magnetism, the capacitor 34 being charged through thyristors 30, 33, and resistor 44. The main thyristor 28 is then turnedon whereby   current passes, from the motor through resistor 43 to build up the field and to increase the braking effect. When the motor voltage exceeds that of the source, regenerated current passes through reactor 39 and diode 41. The main thyristor 28 is quenched when capacitor 34 is discharged through thyristors 31, 32, the voltage across the capacitor being reversed. The main thyristor 29 is then turned-on to build up the motor voltage, the regenerated current passing through reactor 38 and diode 40. The main thyristor 29 is quenched by the thyristors 30, 33. Relay 45 responds to a predetermined value of regenerated current to stop the operation of the chopper 14 until the motor voltage is built up again under the control of relay 46. Reactors 38, 39, reduce the ripple component of the regenerated current. Regenerative braking is followed by dynamic braking utilizing resistors 43, 44. In a further regenerative braking circuit, the chopper has four main thyristors, each associated with a reactor and diode for feeding current back to the source, Fig. 5 (not shown). In a dynamic braking arrangement, the source 113 is replaced by a resistor, an auxiliary source being used to charge the capacitor 34 at the beginning of the braking operation, Fig. 6 (not shown).
Patent GB-1294961-A (GB)
IPC: B29C44/34
Filed: 1970-03-26
Abstract: 1294961 Expanded polystyrene mouldings BADISCHE ANILIN- & SODA-FABRIK AG 26 March 1970 [29 March 1969] 14740/70 Heading B5A [Also in Divisions B1 and C3] Expanded mouldings are formed by mixing a melt of a styrene polymer with 25-200% by wt. of the polymer of an expanding agent at 30-180‹ C. above the glass temperature of the polymer, the expanding agent being fluid at S.T.P., evaporating the expanding agent at a pressure below the vapour pressure thereof so as to leave 3-15% by wt. of the polymer of the expanding agent and to cool the mixture to 90-180‹ C., raising the pressure above the vapour pressure of the expanding agent and then expanding the mixture through a die. The expanding agent may be evaporated in a devolatilizing extruder having a relief valve and thereafter condensed. The moulding produced is preferably in the form of a continuous strip.
Patent GB-1297480-A (GB)
IPC: D21H17/67
Filed: 1971-04-19
Abstract: 1297480 Alkali metal titanates EI DU PONT DE NEMOURS & CO 19 April 1971 [19 March 1970] 24527/71 Heading C1A An intimate mixture of acicular alkali metal titanate and 0À1-10% weight of hydrous silica (claimed per se) is prepared by precipitating hydrous silica in the desired quantity in a slurry of alkali metal titanate. The presence of the silica has the effect of reducing the formation of grit and agglomerates in the titanate and hence improving their value as paper additives. Preferred titanates are potassium titanates having an average diameter in the range 0À5-3 microns and a length to diameter ratio of at least 2 and the precipitation of hydrous silica is preferably achieved at a pH in the range 5 to 8.
Patent GB-1297748-A (GB)
IPC: C22C38/12
Filed: 1971-05-06
Abstract: 1297748 Tool steel CRUCIBLE Inc 6 May 1971 13555/71 Heading C7A Tool steel, with good machinability and cutting performance, comprises:- C 1-4% Co 9-15% Cr 4-6% Mo 3À5-7% N 0À03-0À08% V 1-1À5% and W 7À5-13% the balance being Fe, apart from possible impurity amounts of Mn, P, S and Si. The steel may be made by hot pressing (e.g. at 1900- 2000‹ F.) to at least 95% theoretical (e.g. in a die or by pressurizing with inert gas); and the compact may be further densified by forming and machining operations. The nitrogen may be included in a melt of the alloy or by treating the powder with nitrogen after outgassing but before compaction.
Patent GB-1302551-A (GB)
IPC: A63F3/00
Filed: 1969-01-28
Abstract: 1302551 Board game G D WIMPERIS 28 April 1970 [28 Jan 1969] 4568/69 Heading A6H A game which simulates the sport of motorcycle or motor car racing comprises a board. marked to represent a race track and playing pieces movable in steps along the track. A speedway racing board is provided with dotted lines 4 whereby the playing pieces can be moved into adjacent lanes. Sections 5 indicate that playing pieces landing thereon are governed by hazard cards provided. Capability records of actual rides in the sport are used to provide a handicap system for the playing pieces which are graded A-F, a random selection device 8 being used to specify the moves of each playing piece. The playing pieces are  raced as teams and a random selection device 11 is provided to indicate the order in which the playing pieces are moved at each step. A device 14 is provided to indicate which lap is being run.
Patent GB-1303640-A (GB)
Filed: 1969-06-07
Abstract: 1303640 Continuously casting polymer foam DRAKA PLASTICS NV 7 Sept 1970 [7 June 1969] 28943/69 Heading B5A [Also in Division C3]  A polymer foam is made by passing a mixture of polymer foam producing reactants along a trough-like open-topped conveyer and moving lining sheets, comprising regenerated cellulose, along the conveyer between the foaming reactants and the conveyer sides, the sheets being raised with the rising foam so as to produce a flat top surface on the resultant foam block. The thickness of the upper edge region of each lining sheet may be increased, e.g. by strengthening with a polyethylene film, for engagement with a device for raising the sheet.
Patent GB-1306059-A (GB)
IPC: B25B13/00
Filed: 1971-11-13
Abstract: 1306059 Wrenches SHEFFIELD STEEL PRODUCTS Ltd 13 Nov 1971 52807/71 Heading B3N A collapsible wheel-brace has two members 1A, 1B privoted at their centres by means of a screw 2 which urges the members together in the operative position, Fig. 1. Lateral projections 7A, 7B are provided which in operation lie against arms 5B, 5A and means for effecting interengagement of the members 1A, 1B, particularly concave faces 8 on projections 7A, 7B or coacting projections 12 and recesses 10, Fig. 5, on both members, are also provided to prevent relative rotation of the members. The screw 2 preferably passes through a plain bore in one member 1A and engages a screw-threaded bore in the other, 1B. The device is collapsible, Fig. 2, by releasing screw 2.
Patent GB-1306270-A (GB)
IPC: F02N11/00
Filed: 1970-06-13
Abstract: 1306270 Engine turning gear F PALMER 28 May 1971 [13 June 1970] 28712/70 Heading F1K Apparatus for assisting in the starting up of an internal combustion engine for garden machinery comprises a frame 17, a rotary member 21 supported by the frame and adapted to be rotatably driven by an electric motor (not shown), and a drive shaft 25 coaxial with the member and mounted for axial movement relative to the member but keyed to the member for rotation therewith. One end of the drive shaft is provided with means 29 adapted drivingly to engage the crank shaft 27 of the engine to be started and the other end of the drive shaft is formed with means 33 to enable the drive shaft to be slidden relative to the member into engagement with the crank shaft. As shown the rotary member 21 comprises a pulley for a V-belt 39 which is driven by the electric motor.
Patent GB-1307201-A (GB)
Title: Paper feed mechanisms
IPC: B65H3/02
Filed: 1971-01-06
Abstract: 1307201 Feeding sheets V S BROWN & CO Ltd 4 Jan 1972 [6 Jan 1971] 693/71 Heading B8R A device for separating sheets from the bottom of a pile 4 comprises an apertured table 1, a friction pad 9 mounted for reciprocation beneath the table and a lifting mechanism arranged to lift the pad into engagement with the bottom sheet of the pile on movement of the pad towards a discharge gate 6 and to permit lowering of the pad during return movement of the latter. The reciprocating means for the pad may comprise a crank 17 and a connecting-rod 14. Elongated slot 19 in the rod permits the pad to be momentarily pulled forward as the separated sheet is gripped by more rapidly moving take-out rollers 30 and 31. The lifting means may comprise arms 20 and 21, rockable about pivots 22 and 23 by a cam 29. The arms carry rollers 25 and 26 which abut the rear face of the friction pad. Apertures 32 and 33 in the pad permit the latter to fall rapidly under gravity as the rollers enter the apertures at the front end of the stroke of the pad. A quick release of the sheet is thereby ensured.
Patent GB-1307823-A (GB)
Title: Rolling of strip or plate material
IPC: B21B37/18
Filed: 1969-09-03
Abstract: 1307823 Automatic control of rolling BRITISH IRON & STEEL RESEARCH ASSOCIATION 27 Aug 1970 [3 Sept 1969] 43645/69 Heading G3R A rolling mill is automatically controlled to maintain a desired thickness and shape in strip or plate material. The shape is expressed in terms of two or more different geometric curves. As shown, the shape of rolled strip or plate is detected by a sensor 2 which, for example measures the forces applied to rollers at a number of points across the width of the material. From these measurements a computer 4 derives the constants of at least two geometric curves formed by the material and these constants are applied, together with thickness error signals derived from an X-ray gauge 1 or load cells under the adjusting screws of roll stand 3, to a controller 5. Controller 5 separately controls in accordance with each signal (a) the screw adjustment 6 of roll stand 3 (b) a hydraulic jack 7 bending rolls 3 and (c) a speed regulator 8 for the drive to pay-off reel 9 or take-up reel 10.
Patent GB-1309390-A (GB)
Title: Manufacture of insulated electric cables
Inventor: EDMETT D A
IPC: B29C48/30
Filed: 1969-12-09
Abstract: 1309390 Stuffing-boxes BRITISH INSULATED CALLENDER'S CABLES Ltd 8 Dec 1970 [9 Dec 1969] 60012/69 Addition to 1201528 Heading B5A [Also in Division F2] A machine for extruding a covering on to an advancing cable or core C as disclosed in the parent Specification has a seal at the upstream end of the core tube through which the core passes which comprises an apertured barrier wall 3 which allows passage of the core, and which is provided within the core tube or within a housing 1 secured to the core tube as by a screw-threaded end and 0-ring 7, a helical packing 16, and adjustable pressure-imparting means 11, 18 for compressing the packing against the barrier wall. The core C may be a solid aluminium conductor of sector or segmental cross-section. The packing 16 may be made of strands of P.T.F.E. with or without a graphite filler formed into a rope which may be prevented from unravelling by one or more lappings of P.T.F.E. tape. The barrier wall 3 and a sleeve 6 are retained in the housing 1 by screws 5, 8 and a bush 14 is pressed on to the packing by a spring 11 which is loaded by a hand wheel 18; alternatively the bush may be pressed by fluid pressure.
Patent GB-1319072-A (GB)
Title: Inflatable boats
IPC: B63B7/08
Filed: 1970-05-22
Abstract: 1319072 Inflatable boats DUNLOP HOLDINGS Ltd 21 May 1971 [22 May 1970] 24859/70 Heading B7A The hull of an inflatable boat comprises a series of interconnected tubes 1-5 which are shaped, e.g. by gaffering and tapering-to produce the hull shape shown without the use of other shape inducing members. The stern has a rigid transom 6, but according to a modification (not shown) it can be shaped simularly to the bow. The keel tube 5 has a web (5a) across its vertical diameter to cause the tube to spread widthwise. Figs. 6 and 7 (not shown) illustrate alternative ways of forming the keel tube. The boat can be provided with a rubbing strip (11) and spray shield 7.
Patent GB-1319225-A (GB)
Title: Pressure-sensing apparatus
IPC: G01L9/00
Filed: 1971-01-15
Abstract: 1319225 Determing vapour pressure SMITHS INDUSTRIES Ltd 14 April 1972 [15 Jan 1971] 2055/71 Heading G1L In apparatus in which an external pressure applied to a diaphragm 14 is to be measured, a pressure within a container 10, having a porous ceramic cone 12 mounted on end wall, partially filled with diphenyl and heated by a coil 16 the arrangement is such that as the pressure within the container rises due to heat from the coil 16 the diaphragm 14 is deflected away from a "U"- shaped soft iron rod 20, embedded in cone 12, to reduce the inductive coupling with two soft iron rods 21, wound with coils 22, to stop actuation of an oscillator 23 and actuate a detector 24 to open a switch 17 on the heater coil 16. The temperature is recorded by a resistance thermometer 16 operating a resistance measuring device 19. In an alternative embodiment, Fig. 2 (not shown), the heating element comprises an electrically conductive coating such as graphite around a foam plastics cone within the apparatus and the liquid is a non-electronically conductive volume.
Patent GB-1320177-A (GB)
Title: Weigh-apparatus
IPC: G01G13/295
Filed: 1970-11-24
Abstract: 1320177 Weighing-apparatus W & T AVERY Ltd 19 April 1971 [24 Nov 1970] 55712/70 Heading G1W In batch weighing apparatus for dividing material into batches of predetermined weight and including a weigher 10, feed means 20 operable to deliver the material to the weigher 10 in successive feed cycles each comprising a main feed whereby a major part of each batch is delivered at a fast rate and a subsequent dribble feed whereby the rest of each batch is delivered at a slow rate, and control means 31 actuated automatically by the weigher 10 to end the respective feed cycle when the weigher senses the batch is complete; the feed means operates to provide a single stream of material as a continuous flow during each feed cycle and a timer 30 operates to regulate that flow by reducing it from a main feed rate to a dribble feed rate independently of the operation of the weigher 10 and at the end of a predetermined period of time from the beginning of each feed cycle. The duration of the main feed can be varied by adjustment of the timer 30 to suit the particular material. As shown in Fig.1, the feed means 20 includes a conveyor belt 21 driven alternatively by a high speed motor 22 or low speed motor 23 carrying material from a hopper 24 to fall into a weigh hopper 12 with a counter-weighted bottom opening door 15 operable to release the completed batch. A gate 25, pneumatically operated under electrical control, reduces the thickness of the layer of material flowing along the belt 21 during the dribble feed and a similarly operated gate 27 cuts off the flow when a correct-weight switch 40 is actuated by a balance beam 11. In other embodiments, Figs.3 and 5 (not shown) the feed means 20 employs a vibratory feed trough and a pressurized air feed duct respectively while in the embodiment of Fig. 4 (not shown) the feed is by gravity alone under the control of main feed and dribble feed gates for reducing and cutting off flow respectively.