baber/WOPTO huggingface dataset:
Patent GB-840686-A (GB)
Title: Bearing elements and method of construction
IPC: F16C33/20
Filed: 1957-07-03
Abstract: 840,686. Moulding bearings. WHITE, C. S. July 3, 1957 [Nov. 1, 1956], No. 21106/57. Class 87(2). [Also in Groups XXV and XXXIV] A bearing surface is formed between two elements, and on one of them, by applying a layer of woven low-friction fluorocarbon material to the surface of one of the elements and injection moulding backing material into a space between the other element and a thin backing layer applied to the woven material. Cylindrical bearing elements are made by forcing synthetic resin material 35, Fig. 5, by a piston 36 around sleeves 30 comprising an inner layer of a woven fabric of polytetrafluoroethylene adhered by phenolformaldehyde or other synthetic resin to an outer layer of a woven fabric, e.g. of cotton or glass fibres. Three sleeves 30 are mounted on spools 25 and held by clamps 33 in a bore 32 whilst the material 35 is applied to the middle sleeve 30 through an orifice 34. When the material 35 has hardened on the middle sleeve the clamps 33 are released, the right hand spool is removed and a new spool fed into the left hand end of the bore 32. Alternatively the apparatus may comprise a number of orifices 34, and the bore 32 may contain more than three spools. The material 35 may alternatively be rubber or powdered or molten metal. The bearing element of a ball joint may be formed by covering the ball 41, Fig. 6, with a cap 44 of the Teflon-cotton laminate, and forcing synthetic resin or metal 49 around the cap 44 in a housing comprising stampings 42, 43 and a base 45. The cap 44 is shaped by a die plunger 57, Fig. 8, which presses a sheet of the composite material 23, the edges of which are held between annular members 51, 54. Alternative methods of applying the cap 44 to the ball 41 are described, and the cap material may contain wire reinforcement. The invention may be used in the manufacture of an "A" frame for supporting the wheels of a motor vehicle on a chassis frame and comprising a stud 40, Figs. 14 and 15, carrying the ball 41 of a ball joint at the apex of the " A ", and balls 81 of ball joints connected by a rod 79. The balls 41, 81 are covered with caps 44 of the composite material 23, and the rod 79, balls 41, 81 and the stud 40 are placed in a mould into which metal or synthetic resin is injected to form the A-frame integrally with the covering of the bearing caps 44. In other applications bearing surfaces are provided, respectively, on the thread of a nut employed in the steering mechanism of a motor vehicle, and in a transverse hole through the end of a connecting rod for receiving an apertured ball.
Patent GB-242023-A (GB)
Title: Radio condenser
IPC: H01G5/38
Filed: 1924-09-08
Abstract: 242,023. Dehn, F. B., (Mohawk Electric Corporation). Sept. 8, 1924. Thermionic amplifiers.-A condenser for use in systems in which two or more circuits are to be controlled simultaneously comprises two or more simultaneously variable units and movable plates between adjacent units for initially adjusting the relative capacities of the units to enable the circuits in which the units are connected to be balanced. Fig. 8 shows the application of the condenser to the control of two stages of high frequency amplification in a standard receiving circuit in which the grid circuits of the two valves 61, 80 are simultaneously tuned by simultaneous operation of the units 18, 19 of the condenser 40, after being initially balanced by adjustment of the movable plates with respect to the fixed vanes of the condenser units. The filament side of the grid circuits may be earthed at 68 so that the balancing plates which are connected to the moving vanes of the condenser 40 serve also as a screen against capacity effects between the condenser units. In a modified construction of condenser, the balancing plates are in the form of circular discs mounted on the common spindle for the movable vanes and adapted to be displaced axially to vary the relative capacities of the condenser units. In this case, the fixed vanes are secured directly to the rods connecting the end plates of the condenser, the posts being divided between the units and connected by insulating sleeves.
Patent GB-348456-A (GB)
Title: A portable saw for cross-cutting rails
IPC: E01B31/04
Filed: 1930-07-12
Abstract: 348,456. Sawing. SOC. INDUSTRIELLE R. E. P., 82, Rue de la Victoire, Paris. July 12, 1930, No. 21178. Convention date, July 13,1929. [Class 145 (ii).] A portable saw for cutting rails, comprises a blade S mounted in an adjustable frame 11 pivoted at 9 to the lower end of a swinging link 8. A support 1, carrying a stiffly pivoted arm 6, is shaped at its lower end to fit over the rail R and is clamped thereto by means of a bolt 3, a screw 4 being provided to adjust the standard angularly. During cutting the blade is maintained in a horizontal position by turning the arm 6 about its stiff pivot 5. The end 11d of the saw frame serves as a hand grip for operating the saw.
Patent GB-252588-A (GB)
Title: Improvements in and relating to height finders
IPC: G01C5/00
Filed: 1925-08-24
Abstract: 252,588. Todd, E. N., and Sterling, O. W. Aug. 24, 1925. Distances, determining. - A wireless transmitting apparatus is adapted to be thrown from an aircraft and to be set in action on reaching ground or water, the time elapsing between the moment the apparatus is dropped and the reception of the signal being noted by the airman and used bv him to calculate the 'height of the aircraft from known data as to - the speed at which the apparatus falls. The apparatus shown comprises a buzzer 17, Fig. 5, connected to a spark-transmitter 31, and supplied with current from a battery 21 through a switch 25. These devices are contained in a casing 10, Fig. 6, connected to a parachute 11 by a line 13 acting as antenna, and a plummet 14 is hung from an insulator 15 attached to the switch 25, which is thereby kept open until the plummet touches the ground or water, when the plummet line slackens and a spring 26 closes the switch. The parachute 11 and the line 13 are normally wound round a reel 52, and the plummet line round a reel 50. These reels are dropped with the casing 10; the lines and the parachute unroll and extend during the first part of the fall.
Patent GB-379480-A (GB)
Title: Improvements in or relating to a method of and means for driving brake-testing apparatus
IPC: G01L5/28
Filed: 1931-07-25
Abstract: 379,480. Testing vehicle brakes dynamometrically. POWELL, A. D., 31, Clare Road, and BRADBURY & SONS, Ltd., J., New Street Works, both in Braintree, Essex. July 25, 1931, No. 21277. [Class 106 (ii).] In dynamometric machines of the kind in which the wheels of automobiles are supported on rollers associated with dynamometers and are rotated under brake resistance, two or more dynamometers are driven simultaneously by an endless belt arranged so that the distance apart of the dynamometers can be varied without affecting the tension of the belt. A motor A drives shafts B, B<1> carrying pulleys C, C<1> which transmit power through belts D, D<1> passing over four dynamometer pulleys F, F<1>, H, H<1> and jockey pulleys E, E<1>, G, G<1> arranged as shown for the purpose of varying the distance between the brake tester units to accommodate different wheel bases of cars without affecting the tension of the belt.
Patent GB-1351513-A (GB)
Title: Reflecting mirror type electron microscope
IPC: H01J37/29
Filed: 1971-04-19
Abstract: 1351513 Electron microscopes; semi-conductor targets NIHON DENSHI KK 19 April 1971 [7 Feb 1970 30 March 1970] 21291/71 Headings HlD and HlK In a scanning reflection type electron microscope an electron beam is focused by a lens 4 on to a specimen 6 which is held at a high negative potential to cause the electrons to be reflected to a detector means responsive to the intensity of the reflected electron beam. The detector means may consist of an aperture plate 5 which emits secondary electrons which are multiplied by a multiplier 10 connected to the grid of a cathode ray tube 12 whose scanning is synchronized with that of the microscope. Alternatively an image is formed by the electrons passing through the plate 5 on a fluorescent screen 2. The screen 2 may be situated away from the incident beam by providing a magnetic field (16), Fig. 3 (not shown), to separate incident and reflected electrons. A semi-conducting detecting device may be used consisting of a disc of N- type material (26), Fig. 6 (not shown), on which are diffused sectors of P-type material (27a to 27n) to provide several P-N junctions each providing a separate output signal. These signals can be combined to produce effects analogous to different conditions of illumination of the specimen.
Patent GB-1471436-A (GB)
Title: In-line process for the production of corrugated board
IPC: B31F1/24
Filed: 1974-05-14
Abstract: 1471436 Corrugated paperboard INTERNATIONAL PAPER CO 14 May 1974 [29 May 1973] 21354/74 Heading B5N Corrugated paperboard, e.g. for use for containers, comprising a corrugated medium having at least one liner attached thereto is produced by applying to at least the corrugated medium or to the liner a rapidly collapsible foam of a dispersion or solution of a water resistant resin, a flame retardant, a fire retardant, a mould inhibitor, a fungicide, an insecticide or a mixture thereof, placing the corrugated medium and liner in adhesive contact with each other, heating the resultant composite to complete collapsing of the foam and to complete impregnations of the liner and corrugated medium with the collapsed foam and drying the composite after the completion of the collapse of the foam by further heating. The foam may be applied in a first stage at the time of assembling the corrugated medium and first liner, in a second stage to the exposed fluted single faced corrugated medium and in a third stage to the second liner prior to contact with the single faced corrugated medium. The foam which may also contain a surfactant and a filler, e.g. starch, wood flour or clay, may be produced by blowing air into an aqueous solution or dispersion of the resin or other additives. The water resistant resin may be a ureamelamine- or phenol-formaldehyde resin, polyester, polyamide, epoxy resin, polyvinyl chloride, polyvinylidene chloride, polymethyl methacrylate, butadiene-styrene, acrylonitrile - butadiene - styrene, polyisoprene, polystyrene, polybutadiene, vinyl chloride-vinyl acetate copolymer, ethyl cellulose or cellulose acetate, the fire retardant may be ammonium phosphate or antimony-trioxide, the mould inhibitor may be copper naphthenate and the fungicide may be a zinc salt of methyl-dithio carbamic acid or 2-mercaptobenzothiazole. Suitable adhesives applied to the crests of the fluted medium are starch/urea formaldehyde resin, resorcinol-starch and starch/polyvinyl alcohol adhesives. In Fig. 1 foam from applicator A is applied to liner 2 which is then applied at corrugator 4 to corrugated medium 1 having adhesive applied to the tips of the flutes by applicator 2A. Further foam is applied to the medium by applicator B and the single faced medium heated and dried in oven 5 prior to the application thereto of further adhesive at applicator 6, and a further liner 7 coated with resin by reverse roll applicator C. The double-backed medium is then heated by passage over steam chests 9 and through curing oven 9a and cut into desired lengths at 10. Foam collapse may be accelerated by incorporating a defoaming agent into the paper or by spraying a solution thereof on to the applied foam.
Patent GB-976845-A (GB)
Title: Improvements in or relating to apparatus for extruding tubular synthetic thermoplastic material
IPC: B29C48/09
Filed: 1963-05-28
Abstract: 976,845. Extruding tubes for blow moulding. CONTINENTAL CAN CO. Inc. May 28, 1963 [Aug. 13, 1962], No. 21359/63. Heading B5A. Apparatus for continuously extruding synthetic thermoplastic material as a tube having a controlled varied cross - section comprises an extrusion head 29 containing a die core 36 having a tapered tip 37 defining an annular orifice with the extrusion nozzle 33 which is varied in cross-section by vertical shifting of the core 36 during extrusion of the tube. The vertical shifting is effected by a pneumatic piston and cylinder unit 25 through a pivoted lever 56 connected by a pin 44 to the upper end of the core 36. The pin 44 is threaded into a fitting 65 carrying a pin 64 engaging in the forked end of the lever 56, and locked by a nut 66 in an axially adjustable position determining the initial cross - section of the extrusion orifice. The air supply to the unit 25 is regulated by solenoid valves controlled by a switch operated by cam mechanism driven in synchronism with the mechanism for opening and closing blow moulds (not shown) into which the tubing is fed.
Patent GB-819704-A (GB)
Title: Silicon power rectifier
IPC: H01L21/00
Filed: 1957-07-05
Abstract: 819,704. Semi-conductor devices. STANDARD TELEPHONES & CABLES Ltd. July 5, 1957 [July 6, 1956], No. 21379/57. Class 37. A method of manufacturing a silicon PN-junction semi-conductor device comprises the step of fusing a significant impurity material to a silicon wafer washing in boiling distilled water for at least 15 minutes, etching, and then washing for a second time in boiling distilled water for at least 25 minutes. A silicon power rectifier 1 shown in Fig. 1 consists of a N-type silicon wafer 3 with aluminium or an acceptor impurity material 5. Boron, gallium, indium or thallium may be used instead of aluminium and if a P-type silicon wafer is used phosphorus, arsenic, antimony or bismuth may be used. In the embodiment described a wafer 0.007 inches thick is cut from a grown crystal of silicon and used in conjunction with a sample of high purity (99.99 per cent) aluminium which has been etched with a mixture of hydrofluoric acid and nitric acid. A molybdenum base 2, gold ribbon or foil 4 containing 1 per cent antimony, the silicon wafer 3, aluminium layer 5 and the molybdenum electrode 6 attached to the nickel clad copper wire 7 are held together on a tungsten strip and heated to about 750‹ C. for 15 seconds in hydrogen by passing a current through the tungsten strip. After washing the device in boiling distilled water, a small annulus surrounding the PN-junction region is etched with a mixture of concentrated hydrofluoric acid and concentrated nitric acid after which the device is again washed in boiling distilled water. The device is then dried and encapsulated and may be electro-formed to improve its rectifying properties.
Patent GB-1013712-A (GB)
Title: Method of carbo-nitriding metals
Inventor: MITCHELL ERIC
IPC: C23C8/54
Filed: 1962-06-04
Abstract: Metals are carbonitrided by treatment at 450-600  DEG C. in a fused salt mixture containing sodium and potassium cyanides, the bath having been agitated with sufficient violence to promote partal atmospheric oxidation of the cyanide to cyanate.  The bath normally contains 10-30% of cyanide and 20-30% of cyanate, a particular composition exemplified being potassium cyanide 20%, sodium cyanide 30%, alkaline earth metal carbonates, chlorates or oxides 50%. Ferrous metals coated with rust or scale are simultaneously cleaned by the process.  Agitation may be by an impeller or by having the workpieces in a perforated basket which dips into the salt bath.
Patent GB-719591-A (GB)
Title: Improvements in or relating to fireguards for domestic fireplaces
IPC: F24B1/192
Filed: 1952-08-27
Abstract: 719,591. Fireguards. SHANNON, R. A. Oct. 26, 1953, [Aug. 27, 1952.] No. 21518/52. Class 126. A device for attaching a fireguard to a chimney breast comprises a member pivotally attached to the fireguard and a member adjustable towards or away from the attachment to engage behind the chimney breast. An extensible arm formed of two parts 4, 5, connected by a pin and slot is pivoted to a lug 11 formed on a fitting 12 comprising two slotted discs which can be secured to the wire mesh of the guard. A member 8, adapted to engage behind the chimney breast is attached to one end of the extensible arm, and a spring 15 extends between the arm and the rear of the fireguard to hold the member 8 against the chimney breast. A lever 17 is secured to the arm 4 by a pin and slot, and, in its extended position, a lug 20 engages the upper edge of the arm 4 so that the member 8 may be disengaged from the chimney breast. The lever 17 may be pushed inwards till the lug 20 enters a slot 23, when the lever is held with so little projecting that the member 8 cannot readily be disengaged from the chimney breast.
Patent GB-405261-A (GB)
Title: Spring base or insertion for mattresses, cushions, upholstered furniture or the like
IPC: A47C23/053
Filed: 1932-07-30
Abstract: 405,261. Spring upholstery. SCHLARAFFIA-WERKE HUSER & CO., GES., 29, Kreuzstrasse, Barmen, Germany. July 30, 1932, No. 21571. Convention date, Aug. 24, 1931. Addition to 380,582. [Class 52 (iv).] The eyes formed in the spring coils according to the parent Specification are connected by means of screws, rivets, &c., with a shank long and thin enough to permit the eyes to move in all directions. In the form shown the eyes h of adjacent springs, which are formed on the upper and lower end coils of the middle portion f of the springs and are directed outwardly or inwardly as shown respectively at the top or bottom of Fig. 2, are connected by hollow rivets consisting of a part k engaging within the flange m of a part i when the two parts are pressed together.
Patent GB-834694-A (GB)
Title: Variable speed transmission system especially for vehicles
IPC: F16H37/00
Filed: 1957-07-08
Abstract: 834,694. Change-speed gear; slip couplings. VOITH G.m.b.H., J. M. July 8, 1957 [July 7, 1956], No. 21616/57. Class 80 (2). In a change-speed gear 3 for a motor vehicle wherein speed changes under load are effected solely by changing engagement of ratio selecting mechanical clutches 7, 8 or brakes, without operation of a main clutch, shock loading of the transmission due to rapid synchronizing by the ratio clutches during gear shift is avoided by the provision in a separate casing between the motor 1 and change-speed input shaft 3<SP>1</SP> of a permanently engaged friction slip coupling, the torque capacity of which is limited to 1.2 to 1.3 times the maximum motor torque. During gear shift this coupling slips and effects synchronization slowly. In Fig. 1, the countershaft gear provides a direct and reduced drive by the two clutches 7, 8. In Fig. 2, the gear provides a hydromechanical torque-split drive by a power dividing gear comprising an input planet carrier 103<SP>1</SP>, and two bevel side wheels 130, one connected to output 104 through a hydrodynamic torque converter 132 and a oneway clutch 136, the other connected directly to the output. Application of a brake 108 to the right-hand bevel upshifts the gear to a wholly mechanical overdrive. A further planetary change-speed stage 141 may be added. Figs. 3-5 (not shown), are curves of engine speed against output speed, and input speed and torque against time during shift. The slip coupling, Fig. 6, comprises a driven frictionfaced disc 256 clamped against a driving flywheel 251 by a pressure plate 255 loaded by springs 254, adjustably compressed by screws 252, accessible for adjustment through a removable cover 267. A resilient coupling ring 260 may be arranged on the input or output side of the coupling, which latter may operate dry or in oil.
Patent GB-160399-A (GB)
Title: Improvements in laths for the sails of boats
IPC: B63H9/06
Filed: 1920-03-08
Abstract: 160,399. Ljungstr÷m, F. March 8, 1920. Sails.-The bent laths 1 for the sails of boats described in Specification 140,072 are constructed with the vertex of the curve located nearer the luff than the leech, the radius of curvature increasing from the vertex towards the ends, which may be substantially straight. The laths, which may be surrounded by a sheath of pliable material, fit loosely in pockets attached to the sail and abut at their ends on dished members 6. The length of the laths may be adjusted by screwed or sliding members.
Patent GB-531644-A (GB)
Title: Improvements in or relating to settings for retorts for the carbonisation of coal
IPC: C10B1/06
Filed: 1939-07-26
Abstract: 531,644. Retort furnaces. GIBBONS BROS., Ltd., and FARROR, R. M. July 26, 1939, No. 21767. [Class 51 (ii)] In a retort setting of the kind in which the retorts are arranged horizontally in vertical spaced banks in a chamber subdivided by partitions into a number of combustion chambers to which gas and air are admitted and the combustion products ascend vertically between the vertical banks of retorts and then pass down flues on the outsides of the banks of retorts to a regenerator, the retorts in each bank are in contact or spaced apart a small distance and are oblong in crosssection with their longer dimension vertical, the ratio of the longer dimension to the shorter dimension being approximately between 3:1 and 3:2. The sides of the banks present surfaces free from deep pockets and the gases are arranged to recirculate in the manner described in Specification 436,960. Fig. 1, shows a retort setting in which the oblong retorts 4 are arranged in three vertical banks with combustion chambers 7, 8 to which gas and secondary air are admitted through ports 13, 14, 16, 17. The gases re-circulate by return passages 18, 19.
Patent GB-1016735-A (GB)
Title: Improvements in and in the manufacture of metal casks
Inventor: LEWIS ERIC CRISP
IPC: B65D39/08
Filed: 1963-05-31
Abstract: 1,016,735. Metal casks. E. C. LEWIS & ALUMASC Ltd. July 10, 1963 [May 31, 1963], No. 21787/63. Heading B8D. [Also in Division B3] A metal cask has a pressed body 1 (Fig. 1, not shown) to the ends of which are secured cast rims 5. The body 1 is pressed in two halves from sheets of aluminium or stainless steel or from commercial aluminium clad with pure aluminium. Ribs 4 are formed during the pressing operation and the halves are joined by a weld 3. Cast rims 5 of aluminium or aluminium alloy are welded to the body. An aperture 10 in the side of the body is surrounded by a cast ring 4a welded to the body. An aperture 12 in the end of the body is surrounded by a ring 11 integral with a cast rim 5. In a modification a fitting carrying a valve and a draw-off pipe is located in a central opening at an end of the cask.
Patent GB-287441-A (GB)
Title: Device for the electric distant transmission of angular speeds
IPC: G08C19/38
Filed: 1927-08-19
Abstract: 287,441. Granat, E., and Compagnie des Forges et AciÚries de la Marine et d'HomÚcourt. March 19, 1927, [Convention date]. Alternating-current commutator machines.-Relates to arrangements for transmitting angular speeds to a distance, i.e. for obtaining synchronous running of distant motors at variable speeds by transmitting synchronizing currents from one machine to the other. In the arrangements employing repulsion motors, the receiver motor is provided with field components differing from each other in phase in order to obtain a resultant field similar in character to that of the transmitter motor. Fig. 8 shows a form of transmitter motor in which the stator winding 31 has a commutator 37, 38 with movable brushes for varying the speed, the brushes bearing on the rotor commutator 33 being stationary.
Patent GB-421391-A (GB)
Title: Improvements in or relating to stabilising devices for motor and other road vehicles
IPC: B60G21/05
Filed: 1934-07-27
Abstract: 421,391. Road vehicles. LONGHURST, W. D. H., 260, Tilehurst Road, Reading, Berkshire. July 27, 1934, No. 21980. [Class 108 (ii)] To prevent lateral canting during comering &c. the chassis is connected to the axle by a system of toggle levers linked to a central two-armed lever. The axle casing 6 is connected to the transverse member 1 of the chassis by two toggle levers, the respective links 2, 4, 3, 5 of which are linked at 7, 8 respectively by links 9, 10 to a two-armed lever 11 pivotally mounted on a central bracket 12 depending from the member 1. The arrangement is such that as one side of the vehicle sinks on cornering the opposite side of the vehicle is caused to sink equally and so preserve the vehicle on an even keel.