baber/WOPTO huggingface dataset:
Patent GB-1224406-A (GB)
Title: Belt tensioners
IPC: F16H7/14
Filed: 1969-10-24
Abstract: 1,224,406. Variable-speed belt gearing. MASSEY-FERGUSON INDUSTRIES Ltd. 24 Oct., 1969 [29 Oct., 1968], No. 52120/69. Heading F2D. In a V-belt expanding pulley gear, for agricultural machines, having input and output pulleys 12, 18 on parallel motor and driven shafts 14, 16 connected by belts 36, 38 to a variable double countershaft pulley assembly 22 carried in slotted arms 44 of a carrier pivoted at 48, and formed by three flanges 24, 30, 26, the centre one 30 of which is displaceable between the outer two 24, 26 for ratio change by pivotal movement of the pulley assembly 22 about the pivot 48 by an hydraulic ram 50 between limit stops 64, 66 on a screwed adjuster 58, the belt tension is automatically controlled by a toggle linkage belt tensioner 68 which provides increasing linear force on the countershaft pulley assembly 22 along its guide slots 42, upon belt stretch, to provide constant belt tension to maintain power output and improve belt life. As shown, the belt tensioner toggle-linkage is loaded by a spring 104, whilst in Fig. 7 (not shown), the spring is replaced by a constant pressure hydraulic unit (112). In Fig. 8 (not shown), the toggle-linkage is connected to a variable-pressure rotary valve (136) the position of which, controlled by the toggle-linkage, varies the hydraulic pressure in a ram 126 to duplicate the required force on pulley assembly 22 to maintain belt tension.
Patent GB-1248642-A (GB)
Title: Improved method for extruding difficult-to-process polymers
Inventor: MERGES JR J C
IPC: B29C48/33
Filed: 1969-10-24
Abstract: 1,248,642. Extruding high molecular weight polymers. SUN OIL CO. 24 Oct., 1969 [20 Nov., 1968], No. 52132/69. Heading B5A. In the extrusion moulding of rods or tubes of high molecular weight thermoplastic polymers, i.e. polymers having no measurable melt index under the conditions of ASTM Method D 1238-65T, such a polymer is transported to the die of the extruder as discrete particles at a temperature below the melting point of the polymer, the polymer is heated and fused under pressure within the die to form a homogeneous molten mass at a temperature below the thermal degradation temperature of the polymer and subsequently, prior to extrusion, the polymer is cooled to a temperature below the melting point of the polymer. The polymers listed as having no measurable melt index under theabovementioned test conditions are polyethylene of molecular weight greater than 500,000, polypropylene of molecular weight greater than 400,000, polystyrene of molecular weight greater than 50,000, a polyester of molecular weight greater than 70,000, a polyamide of molecular weight greater than 90,000 and PVC of molecular weight greater than 50,000. The extrusion apparatus, which as shown forms a tubular extrudate 26, comprises up to the vicinity of the die 29 a screw 22 of constant diameter core, a heater 27 and a cooler 28, the screw preferably being chromium plated and the die being preferably chromium plated or coated with a fluorocarbon polymer. Some heating is effected by the mechanical work on the particles by the screw, but the particles are not melted prior to entry into die 29. The compression ratio between the screw and die is preferably within the range 0À2-0À9. Various tables of results are given.
Patent GB-1243834-A (GB)
Title: Improvements in and relating to a convertible settee bed
Inventor: WIBERG OLE
IPC: A47C17/165
Filed: 1968-11-05
Abstract: 1,243,834. Bed settees. O. WIBERG. 5 Nov., 1968, No. 52307/68. Heading A4J. In a bed settee, in which the back-rest 6 is swung out to form an extension of the seat portion 4, a ticking or like covering 16 may be laced at opposite borders to the frame, at 17 and to the back-rest 6. When the backrest in returned to the sitting position, the covering 16 lies folded beneath a removable seat cushion (15). Reference has been directed by the Comptroller to Specification 1,137,754.
Patent GB-1363888-A (GB)
Title: Fuel cell catalyst electrode
Inventor: FELTEN E J
IPC: C25B11/10
Filed: 1971-11-11
Abstract: 1363888 Gas diffusion electrodes UNITED AIRCRAFT CORP 11 Nov 1971 [18 Nov 1970] 52336/71 Heading H1B A gas diffusion electrode comprises a substrate supporting a catalyst layer consisting of an alloy of platinum with nickel, copper, iron or cobalt. The alloy is in particulate form and an adherent coating of tungsten oxide is disposed upon the surface of the particles. The coated alloy particles are held together by a P.T.F.E. binder on a carbon paper substrate. Preferably, the alloy also includes rhodium to increase its surface area. The electrode may be used in a fuel cell in which the fuel is hydrogen and the electrolyte is H 3 PO 4 .
Patent GB-1073410-A (GB)
Title: Improvements in or relating to synchronising devices for change speed gearboxes
IPC: F16D23/02
Filed: 1965-12-13
Abstract: 1,073,410. Positive clutches. ZAHNBADFABRIK FRIEDRICHSHAFEN A.G. Dec. 13, 1965 [Dec. 22, 1964], No. 52748/65. Heading F2C. Balk-rings 11, 12 of a double, friction-synchromeshed claw-clutch in a motor vehicle change-speed gear, have groups of balk-teeth 13, 14, spaced by recesses (22) (Fig. 2, not shown) and chamfered at an included angle of approximately 120 degrees to provide optimum balking effect with correspondingly chamfered groups of teeth on an internally toothed axiallyslidable clutch sleeve 16 splined on a shaft hub 4, the remaining teeth on the clutch sleeve 16 being chamfered at an included angle of approximately 95 degrees to provide easy engagement, as soon as synchronism is established, with correspondingly-chamfered teeth on clutch members 7, 8 fast on gear-wheels 2, 3 freely mounted on a shaft, all the teeth 17 on the sleeve 16 then being in driving mesh with the teeth 9 or 10 on the gear-wheels 2 or 3. The balk rings 11, 12 and/or synchronizing members 7, 8 are provided on their coned synchronizing surfaces with a wear-resisting coating of molybdenum or non-ferrous metal, or an organic lining, similar to a clutch lining, applied to the coned surface in band or powder form by adhesive bonding or pressing on. The synchronizing surface may further be provided with circular, preferably spirally shaped and/or axially directed oil grooves or incisions, which are cut after the lining application. If the balk rings 11, 12, shift sleeve 16 or clutch members 7, 8 are of non-ferrous metal, the relative balk and intermeshing teeth thereon may have a wear-resisting coating of hard chromium plating.
Patent GB-1178336-A (GB)
Title: Improvements in or relating to Thyristors.
Inventor: KAMENICKY JAN
IPC: H03K17/72
Filed: 1967-11-21
Abstract: 1,178,336. Switching circuits. CKD PRAHA, OBOROVY PODNIK. 21 Nov., 1967 [23 Nov., 1966], No. 52836/67. Heading H3T. In a circuit for switching on a plurality of parallel connected thyristors 1, 1<SP>1</SP>, each thyristor has one of its main electrodes connected via a power diode 2, 2<SP>1</SP> to a power voltage source 3 and via an auxiliary diode 4, 4<SP>1</SP> in in series with an impedance 5, 5<SP>1</SP> to a terminal of an auxiliary voltage source 6 and has its other main electrode connected to a terminal 7 common to both the power and auxiliary voltage sources such that parallel operation of the thyristors is effected by firing of the thyristors. The voltage on the auxiliary line 6 is higher than the minimum anode voltage of the thyristors 1, 1<SP>1</SP> but is disconnected from the anodes by the auxiliary diodes 4, 4<SP>1</SP> which are reverse biased. When the thyristors 1, 1<SP>1</SP> are fired the first one to become conductive lowers the voltage on line 3 to the value of its forward drop. The anodes of the other thyristors then become disconnected from the main line 3 due to the diodes 2, 2<SP>1</SP> but the auxiliary voltage is connected to the anodes via the diode 4, 4<SP>1</SP> so that the other thyristors turn on. The impedances 5 may be resistors.
Patent GB-1536708-A (GB)
Title: Thermostats
IPC: H01H35/26
Filed: 1976-12-22
Abstract: 1536708 Thermal switches E SPAHN 22 Dec 1976 [13 Jan 1976] 53508/76 Heading H1N A thermostatic control device comprises a housing in which is movable a tumbler switch 1, the switch being spring biased towards a regulating screw 10 which alters the position of switch operating rod 2 relative to the thermostatic actuator. As described, the switch 1 is pivoted about a rod 7 in a U-shaped housing 6, a leaf spring urging it towards the screw 10. An expansion bellows 14 engages the switch rod 2 and is connected by a capillary 15 to a sensor 16. In another arrangement, Fig. 3 (not shown), the screw is mounted to one side of the housing and acts on the switch through a lever (12).
Patent GB-1373638-A (GB)
Title: Photoconductive compositions
IPC: C08F8/00
Filed: 1971-11-18
Abstract: 1373638 Photo-conductive composition EASTMAN KODAK CO 18 Nov 1971 [18 Nov 1970] 53637/71 Heading G2C [Also in Division C3] Photo-conductive compositions contain a cocrystalline complex of a pyrylium dye and an electrically insulating polymer containing an alkylidone diarylene residue in the recurring unit which is prepared by dissolving the dye and the polymer in an organic solvent containing a halogenated hydrocarbon to give a solution, then slowly combining the solution with a non- halogenated, non-polar organic liquid in which the dye and polymer are insoluble, thus precipitating a co-crystalline complex of dye and polymer, and then separating the complex from the solvent and precipitating liquid. The examples describe compositions containing the cocrystalline complex of various thiapyrylium dyes and polycarbonates, organic photo-conductors and polymeric binders, e.g. polystyrene. Such a composition may be coated on a polyethylene terephthalate film support bearing an electrically conducting layer of cuprous iodide.
Patent GB-1093236-A (GB)
Title: Key lever for a pianoforte-type keyboard
IPC: G10C3/12
Filed: 1965-12-17
Abstract: 1,093,236. Keyboards. B. STURBA, A. VIVANI, and G. VIVANI. Dec. 17, 1965 [Jan. 16, 1965], No. 53710/65. Heading G5J. Key levers for pianoforte type keyboards are pivoted on the keyboard shaft by members attached to the levers and rotatable on the shaft. The lever body (Fig. 2) formed by bending down sides 2<SP>1</SP> from a flat plate, has two downward projecting flanges 2<SP>1</SP> each bearing a notched lug 3 which engages frictionally with a groove 14a in a roller 11 rotatable on the keyboard shaft (Fig. 3, not shown). Details of three types of roller are given (Figs. 3, 4, 5, not shown). A stop 16 (Fig. 16, not shown), situated in the cavity between surfaces 2, 2<SP>1</SP> and the inwardly-extending ears 4, limits upward and downward motion of the lever. Spring 15, acting between the lever and the keyboard, provides a downward force on the pivoted end of the lever. A downwardly-projecting tongue 6 may be provided to actuate electrical contacts.
Patent GB-1330197-A (GB)
Title: Treatment of mercury waste
IPC: C02F9/00
Filed: 1971-11-19
Abstract: 1330197 Mercury cathode cell FRIEDRICH UHDE GmbH 19 Nov 1971 [21 Nov 1970] 53842/71 Heading C7B [Also in Division B1] Mercury-bearing wastewater, from a plant for the electrolysis of brine employing a mercury cathode, is purified by evaporating water from the wastewater at subatmospheric pressure (e.g. 92À5 mm Hg) and condensing the vapour, the condensate being used as flushing water for the electrolysis plant. The concentrated impurities are intermittently discharged from the evaporator, by means of an adjustable timer, and may be treated to obtain mercury-bearing sludge, the dry sludge being sent to a distillation oven where mercury is recovered. Before being introduced into the evaporator, the wastewater may be submitted to treatment with hydrazine followed by filtration. The heat needed for the distillation may be obtained from hot brine.
Patent GB-1498012-A (GB)
Title: Transmission including a hydrodynamic torque converter
IPC: F16H47/08
Filed: 1974-12-18
Abstract: 1498012 Hydrodynamic torque converters SRM HYDROMEKANIK AB 18 Dec 1974 [14 Feb 1974] 54769/74 Divided out of 1498011 Heading F2W  The Specification describes and claims an arrangement of separate radial and axial bearings in the hydrodynamic torque converter of a transmission as described in Specification 1,498,013. Axial, plain or needle bearings 200, 204 are interposed between the reaction ring 50 and the rotary casing 22 of the converter and the turbine 52, an axial, plain or needle bearing 202 is located between the turbine shaft and the rotary casing 22, and the shaft 6 of the reaction ring 50 is axially located at one end by a bearing 8 mounted in the fixed housing (not shown). The other end of the shaft 6 is journalled in the turbine by a radial bearing 10, one end of the turbine shaft is mounted in a radial bearing 26 in the rotary housing 22 and the other end in a radial bearing 34 in an output shaft 36 of the transmission, and the rotary casing 22 is mounted at one end on a radial bearing 28 and at the other end in a radial bearing in the flywheel of the engine to which the transmission is connected.
Patent GB-552686-A (GB)
Abstract: 552,686. Cleaning coke ovens. BRASSERT & CO., Ltd., H. A., and BRUTON, A. L. Oct. 28, 1941, No. 13873. [Class 99 (ii)] [Also in Group XII] Deposits are removed from the interior surfaces of coke ovens, for example ovens of the kind described in Specification 440,181, [Group III], by suction means mounted on and moving with the ram for discharging coke. As shown in Fig. 1, suction apparatus is mounted on the beam 13 of the coke discharge ram and comprises one or more nozzles 16 arranged behind the ram head 12 and connected by a pipe 15 to a separator 17 provided with a fan 18 discharging cleaned fluid to the atmosphere. In a modification the separator and fan are mounted independently of the ram and connected by flexible connections to the pipe 15 and a pipe returning clean gas to the back of the ram head. As shown in Figs. 3 and 4, four nozzles 16 are arranged behind the ram head 12 and communicate with primary cleaning separators 23, 24 and suction pipe 15 leading to secondary cleaning apparatus 25, the cleaned fluid being delivered to atmosphere. In the modification shown in Fig. 5, the cleaned fluid is returned from the apparatus 25 to a return pipe 20 provided with a hit and miss regulator for induced air which is returned to a position behind the ram and serves to burn and loosen the deposits. The suction power may be derived from electric, hydraulic or other convenient source and may be switched on and off automatically in accordance with the position of the ram head. The suction power may be increased automatically as the ram approaches the centre of the oven where the deposits are thickest. The proportion of recirculated cleaned gas to air may be controlled in accordance with the height of the ram above the floor level.
Patent GB-1409296-A (GB)
Title: Process and device for document scanning
IPC: G06V10/10
Filed: 1972-11-30
Abstract: 1409296 Scanning a document COMPAGNIE HONEYWELL BULL 30 Nov 1972 [30 Nov 1971] 55434/72 Heading H4F In a system for scanning an image on a document the image is projected on to the target of a pick-up tube when the image is illuminated by a flash of light. The stored image is read out by a scanning electron beam, and any image left on the target after reading out is erased by scanning the target with the defocused beam. As applied to a character recognition system the document is mounted on a rotating drum, the rows of characters lying parallel to the axis of the drum. A light source synchronized with the rotation of the drum flashes once in each revolution to project images of successive rows in turn on to the target of a vidicon pick-up tube. The stored image is raster scanned by an electron beam, the resultant signal passing to a recognition unit, not described. The beam is then defocused to erase any residual image prior to the projection of the image of the next row on to the target.  The row may be viewed by two or more lens systems to project respective lengths of the row on to vertically spaced areas of the target, scanned successively. The lengths viewed may be indicated by shadows projected on to the document by a mask interposed between the light source and the drum.
Patent GB-1125978-A (GB)
Title: Microwave semiconductor device
IPC: H03F3/55
Filed: 1966-12-13
Abstract: 1,125,978. Semi-conductor devices. NIPPON TELEGRAPH & TELEPHONE PUBLIC CORP. 13 Dec., 1966 [20 Dec., 1965], No. 55684/66. Heading H1K. In a microwave amplifier an input is coupled to one end of a semi-conductor plate and an output derived from the opposite end, shielding being provided between the input and output. A direct voltage is applied along the length of the plate, which greatly exceeds the wavelength of the input signal, the voltage being above that at which the drift velocity of conduction electrons in the plate begins to decrease with increasing field, e.g. at 3000 volts/cm. Typically the plate, of N-type gallium arsenide or indium phosphide, is about 2 mm. long. In one arrangement (Fig. 5, not shown) the input and output means consist of doughnut-shaped resonant cavities separated by a cylindrical shield through which the body extends. In a second arrangement the microwave input and output are fed via coaxial connectors capacitively coupled to microwave strip lines attached to the ends of the plate. In this case the strip lines and plate are sandwiched in insulating fashion between metal plates providing the shielding. The strip lines may be formed as resonant loops. In an otherwise similar arrangement the input and output are connected to the ends of a slow wave circuit overlying but insulated from the plate. In yet another arrangement the plate is mounted on an inward protrusion from the wall of a waveguide (Fig. 8, not shown) with a slow wave circuit overlying but insulated from it. Finally, as in the Fig. 9A arrangement the input and output are directly connected to a slow-wave circuit 60 of helical form capacitively coupled to semi-conductor plate 1.
Patent GB-1497800-A (GB)
Title: Device for storing lantern slides
IPC: G03B21/64
Filed: 1974-12-24
Abstract: 1497800 Lantern slides; projector B DRWIEGA 24 Dec 1974 [14 June 1974 16 Oct 1974] 55688/74 Headings G2J and G2X A device for storing framed lantern slides comprises a pair of members (12), (13) separably connected together and having a linear array of apertures D for the picture areas of lantern slides mounted therein, means (e.g. hinges 2) being provided for joining the device edge-to-edge with similar devices with the arrays of apertures parallel so that the joined devices can both lie flat (e.g. like the leaf of an album) and be folded up to form a polygonal prism. In a modification, each device has only a single aperture but has further means for separably joining the device edge-to-edge with similar devices to form a chain of devices having a linear array of apertures, the chains being connectable in the same way as the above multi-aperture devices (e.g. using wire fasteners). The slides in the joined devices may be viewed using a projector having a polygonal prism for supporting the devices, the prism being both rotatable and axially movable so that the different slides can be aligned with the lens (on pedestral 10) and the light source 9. The devices may be stacked in base 10 before and after projection.
Patent GB-1322780-A (GB)
Title: Method of attaching a zip fastener or a length of zip fastener tape to a fabric
IPC: A41H37/00
Filed: 1970-11-24
Abstract: 1322780 Sliding clasp fastener YOSHIDA KOGYO KK 24 Nov 1970 [27 Dec 1969] 55791/70 Heading DIG A sliding clasp fastener is attached to a fabric by sliding the clasp S towards its abutment at end 24, placing it on the fabric at an opening therein and twisting the stringer tapes 11, 12 to bring the element free edges 16, 17 in facing relationship at the edges of the opening and stitching the tapes to the fabric, leaving a non sewn portion at the end 24. That end is then brought through the opening to the other side of the material and closed. If the tapes have been twisted to bring the element free edges over the element edges 18, 19 as shown in Fig. 1 then the end 24 is somersaulted to pass through the opening (Fig. 6 not shown) if twisted the other way the end is passed through without turning (Fig. 11 not shown). The fastener may be of the concealed type.
Patent GB-1170588-A (GB)
Title: Improvements in or relating to Flow Control Devices for Fluids
IPC: F15C3/06
Filed: 1966-12-13
Abstract: 1,170,588. Valves. SETARAM SOC. D'ETUDES D'AUTOMATISATION, DE REGULATION ET D'APPAREILS DE MESURES. 13 Dec., 1966 [15 Dec., 1965], No. 55834/66. Heading F2V. A flow control device having two stable positions comprises a ball 1 moved between seats 5 and 6 by fluid pressure at an inlet 11 and actuating pressure at a port 10 acting on a piston 2 disposed in a cylindrical cavity. When there is no actuating pressure the ball 1 is held on the seat 6 by inlet pressure to close inlets 13, 14 connected with a source of reference pressure, but when the actuating pressure exceeds the inlet pressure the ball is moved on to the seat 5 to close the inlet and connect the outlet with inlets 13 and 14. The piston has a groove 9 which houses a toroidal seal 7, and the dimensions of the seal and groove are such that, upon displacement of the piston, the seal deforms without sliding occurring between the seal and the bottom of the groove and the wall of the cylindrical cavity, and the seal does not contact the sides of the groove.
Patent GB-1409297-A (GB)
Title: Compensating apparatus
IPC: B60K23/02
Filed: 1972-12-04
Abstract: 1409297 Clutch control VOLKSWAGENWERK AG 4 Dec 1972 [4 Dec 1971] 55844/72 Heading F2L An automatically adjustable clutch release linkage for a motor vehicle comprises a spring 19 which acts on a rod 16 to take up any slack in the linkage during clutch engagement. In Fig. 1 the rod 16 passes through an aperture 13 in a clamping plate 12 which is fast with a clutch pedal shaft 11. On depression of the pedal 10 the clamping plate 12 tilts to a position in which it grips the rod 16 and thus transmits clutch release movement thereto. On release of the clutch pedal 10 the clamping plate 12 abuts a stop 20 and is held in a position in which the rod 16 is free to slide through the aperture 13. In this position the spring 19 takes up any slack in the linkage. The rod 16 is connected to the clutch release mechanism through a cable 14. In Fig. 3 the clamping plate 12 is pivotally carried by a link 22 which is itself pivoted to an arm 21 fast with the clutch pedal shaft 11. On release of the clutch pedal 10 the clamping plate 12 abuts the stop 20 and the rod 16 is free to slide through the aperture 13 in the clamping plate and thus permit the spring to take up slack in the linkage. On depression of the pedal 10 the clamping plate 12 tilts to grip the rod 16. In Figs. 5 and 6 (not shown) the rod (16) is axially guided in a fixed bracket and the clamping plate (12) is pivotally connected to an arm (23) fast with the clutch pedal shaft (11). In Fig. 7 the rod 16 passes through a recess 13 of an extension of the clutch pedal shaft 11 which forms a locking plate. On depression of the pedal 10 the shaft 11 rotates and the sides of the recess 13 grip the rod 16 to transmit clutch release movement thereto. On release of the clutch pedal 10 the rod 16 is free to move through the recess 13 and thus permit the spring 19 to take up slack in the linkage.