baber/WOPTO huggingface dataset:
Patent GB-1148791-A (GB)
Title: Toggle-actuated electric switches
IPC: H01H9/00
Filed: 1966-04-22
Abstract: 1,148,791. Snap-action switches. TEXAS INSTRUMENTS Inc. 22 April, 1966 [26 April, 1965 (2); 30 Dec., 1965], No. 17740/66. Heading H1N. In a lever-actuated switch the resilient contact arm 68, Fig. 6, is yieldingly supported to pivot on two frame legs 56, 58 of a central terminal 54 under the action of spring-pressed roller 116 moving over a stiff actuator element 74 overlying the contact arm 68 so that it moves from a central V-shaped depression 73 between the legs 56, 58 to one of two positions (shown) at which the biasing force is to one side of the legs 56, 58. The arm 68 has limited flexing movement to produce sliding between the contacts 70, 71. A rigid breaker plate 176 beneath the arm 68 also produces a positive break if the contacts become welded. The lever 95 is pivoted on a yoke 77 enclosed within a hermetically sealed metal bellows 100. A rubber gasket 98 protects the bellows 100 from ingress of dirt. The terminals 24, Fig. 2, are soldered at flanges 38 on to metallized surfaces of ceramic or phenolic resin bushes 30 which are soldered within flanged apertures 28 of a metallic casing 18. A cup-shaped casing 46 of ceramic or phenolic resin is mounted within the metal casing and has a wall 44 for separating the contact pairs and also forming a guide at 106 for the toggle block 107. The terminals are surrounded externally by an insulator 12 and sealed with potting compound 40.
Patent GB-229569-A (GB)
Title: Improvements in or relating to electric locomotives and other electrically propelledvehicles
IPC: B61C9/48
Filed: 1924-07-25
Abstract: 229,569. Jackson, A. H. July 25, 1924. Motors, mounting or supporting.-Relates to electromotors carried by springs on the frame and on the axle in which means are provided for ensuring parallelism between the motor shaft and axle. Extensions 6 from the motor casing 1 form horn blocks for axle boxes 5, springs 7 being arranged above and below the axle boxes. A transverse shaft 10 journaled on the motor casing carries arms 9 connected by links to the axle boxes. In a modification, the transverse shaft is arranged as a sleeve on the axle.
Patent GB-1216888-A (GB)
Title: Electrical insulation
IPC: H01B3/44
Filed: 1968-04-16
Abstract: 1,216,888. Electrical insulation. MINNESOTA MINING & MFG. CO. 16 April, 1968 [17 April, 1967], No. 17967/68., Heading D1P. Insulation for a cable, transformer or capacitor comprises synthetic paper saturated with oil, e.g. mineral, polypropylene or polybutene oil. The material of the paper may be polypropylene, poly-4-methylpentene, polybutene- 1, propylene/ethylene copolymer, or a polycarbonate, having a softening point above 110C. The paper is formed from at least 50% of fine fibres having a diameter of less than 10 microns and up to 50% of coarse fibres having a diameter of less than 30 microns. The fine fibres are formed by extruding a fine stream of the molten polymer into a stream of hot gas. The fibres are formed into paper by a wet or dry process. The fibres in the paper may be bonded together by heat optionally in the presence of a solvent. The formed paper is washed to remove polar impurities and dried. The dried paper has a Gurley porosity of less than 20,000 seconds per 100 cc or air. The oil-saturated paper has a dielectric strength of at least 1,400 volts per mil at a thickness of 5 mils; a dissipation factor less than 0.001 at 500 volts, 60 cps and 160C; and a dielectric constant at 60 cycles AC of less than 3 at 80 C.
Patent GB-1436527-A (GB)
Title: Purification of methyl acetate
IPC: C07C69/12
Filed: 1974-04-25
Abstract: 1436527 Methyl acetate MONSANTO CO 25 April 1974 [26 April 1973] 18036/74 Heading C2C Methyl acetate is separated from a methyl acetate/water mixture by a series of stages comprising (a) extraction of methylacetate by a hydrocarbon solvent (b) separation of hydrocarbon stage and aqueous phase (c) distillation of the hydrocarbon phase to remove water traces and (d) a fractional distillation of the bottoms from the distillation stage to remove anhydrous methyl acetate overhead and provide a bottoms stream of solvent which is recycled. The solvents may be aromatic (6-12 C), paraffinic, cycloaliphatic or olefinic (6-10 C) and benzene is used in examples. The aqueous phase from (b) may also be distilled to remove any methyl acetate overhead.
Patent GB-655730-A (GB)
Title: Improvements in or relating to looms for weaving pile fabrics
IPC: D03D27/06
Filed: 1948-07-06
Abstract: 655,730. Woven fabrics having pile formed by hooks. STEVENS, A. H. (Libertyville Textiles, Inc.). July 6, 1948, No. 18130. [Classes 142(ii) and 142(iii)] Pile is formed in a woven fabric by hooks which form loops of pile warp threads during weaving. The loops may be cut. Ground warp threads and a weft thread are woven in the usual manner and pile warp threads from a separate warp beam pass over a movable' back rest 39, 40 and through a separate heddle. Immediately prior to loop formation, the ground warp threads are lowered and the pile warp threads raised. Hooks 110, mounted on the loop forming mechanism F, are moved rearwards between the pile warp threads by an arm 68 on a shaft 66 rotated through a clutch and a chain drive from the main shaft. The hooks are turned to engage the pile warp threads by transverse movement of a member 115 engaging the cranked upper ends of the hooks. The member 115 is moved by levers 76, 73, and a cam 71, on the shaft 66. The picking sticks are operated from a shaft 55 which is rocked by cams 51, 52 on the main shaft, which cams engage a boss on a bracket 54 on the shaft 55. While the loops are being formed, the shuttle boxes are lowered and picking is thereby interrupted. A dobby controls the shedding mechanism, the operation of the clutch on the shaft 66 and thereby the frequency of loop formation, the lowering of the shuttle boxes, also rachet mechanisms on the back rest whereby the pile warp threads are slackened during loop formation. In a modification, knives are fitted to the hooks and are lowered to cut the loops.
Patent GB-1426593-A (GB)
Title: Photographic diffusion transfer products and processes
IPC: G03C8/52
Filed: 1973-04-16
Abstract: 1426593 Photographic colour diffusion transfer material POLAROID CORP 16 April 1973 [24 April 1972] 18134/73 Heading G2C A photographic diffusion transfer material comprises at least one silver halide layer having dye image-providing material associated therewith and/ or a dyeable stratum and comprises also a neutralizing layer, a spacer layer, an aqueous alkaline processing composition and means for spreading the processing composition through the material in a position such that the processing composition passes through the spacer layer to reach the neutralizing layer, the spacer layer comprising a continuous matrix of synthetic polymeric material that is impermeable to processing composition and that has been obtained from an aqueous dispersion of the polymeric material and as a discontinuous phase within the matrix a material which is permeable to the processing composition. The permeable material may have increased permeability to alkali at increased temperatures and may comprise polyacrylamide, isopropyl cellulose, hydroxypropyl cellulose, acrylonitrile-acrylic acid copolymer, methacrylate-acrylic acid copolymer, poly-N-ethyl-acrylamide, polyethylene oxide, terpolymer of N-ethyl-acrylamide, methacrylamide and acrylamide, N-ethyl-acrylamide-2-vinylpyridine copolymer, N-isopropyl-acrylamide N-vinylpyrrolidone copolymer or N-isopropylacrylamide dimethylaminoethyl acrylate copolymer. The dispersion from which the continuous matrix is prepared may have a particle size of 0À095Á-0À130Á. The ratio of the material of the continuous matrix to the material of the discontinuous phase in the spacer layer may be 19:1 to 99:1. The spacer layer may contain 300-1700 mg solid per square foot surface area. The material may be an integral negative-positive material. The continuous phase may comprise 60-38-2 copolymer of methyl methacrylate, butylacrylate and acrylic acid, 60-30-4-6 copolymer of butyl acrylate, diacetone acrylamide, styrene and methacrylic acid, 60-30- 4-6-1À5-0À5 copolymer of butyl acrylate, diacetone acrylamide, styrene, methacrylic acid, 2- sulphoethyl methacrylate and divinyl benzene, polyvinyl chloride, vinyl-chloride vinyl acetate copolymer, or a terpolymer of butyl acrylate, methyl methacrylate and acrylic or methacrylic acid.
Patent GB-403682-A (GB)
Title: Improvements in or relating to perambulators and like vehicles
IPC: B62B5/04
Filed: 1932-06-28
Abstract: 403,682. Perambulator brakes. SIMPSON, B., and MURDOCH, H. B., c /o Simpson, Fawcett, & Co., Black Bull Street, Hunslet, Leeds. June 28, 1932, No. 18197. [Class 103 (i).] In perambulators in which the extension of the wheel base brings a brake into operation to maintain the vehicle stationary the movable pair of wheels is operated through spring controlled toggle mechanism to engage brake blocks fixed on the undercarriage. The axle 5 of the wheels 6 is slidable on bars 7 and is connected by a toggle formed by links 8 and levers 9 to a cross-bar 4 of the vehicle frame. When the toggle is broken by depression of treadle 14 springs 8x slide the axle 5 to extend the wheel base and the wheels 6 are brought against brake blocks 13. The springs normally maintain the toggle on the other side of its dead centre and hold the axle 5 against spring washers to prevent rattle. Intermediate stops may be provided to adjust the wheel-base. In a modification the axle of the movable wheels is carried by arms pivoted to the chassis.
Patent GB-151917-A (GB)
Title: Improvements relating to screw propellers
IPC: B64C11/36
Filed: 1919-05-16
Abstract: 151,917. Austin Motor Co., and Walker, C. B. May 16, 1919. Regulating.-Means are provided for varying the pitch of an aerial screw propeller automatically, according to the altitude or the throttle opening of the engine. A lever 21 is pivoted on a fixed axis 22 and connected by an insulating link 23 to a centrifugal governor 24. A fixed contact arm 27 carries contact plates 28, 29 which may make contact with either of the points 25, 26 on the lever 21, according to the speed of the governor. The plates are connected to the coils 35, 36 of the mechanism which adjusts the blades as described in Specification 149,755, [Class 114, Ships &c., Propelling &c.], so that as the engine speed falls with increase in altitude, the pitch of the propeller is decreased and vice versa. The arm 27 is carried by a spindle 30 controlled so that the opening or closing of the throttle 31 moves the arm upwards or downwards. This is effected by making the arm helical, so that the effective level of the portion between the points 25, 26 is varied. Another arm 32 is provided on the reverse side, the plates 33, 34 being connected to the plates 29, 28 respectively, for use when the pitch is reversed. The apparatus may be used to control marine propellers. Hand adjustment of the pitch may be effected by the switch 38.
Patent GB-418690-A (GB)
Title: Improvements relating to adjustable struts
IPC: B60J1/04
Filed: 1933-06-27
Abstract: 418,690. Chain gearing ; racks. HARCOURT, B. W., and MANN, A. J., c/o Harcourt, Ltd., Theodore Street, Birmingham. June 27, 1933, No. 18266. [Class 80 (i).] Two or more chains x, y have their inner links a<1> and outer links a formed with undercut projections, so that when the chains are fed together with outer links of one opposite to inner links of the other, they form an extensible strut which is rigid in the plane of the paper. The flexible, non-engaging parts of the chains are housed in channels g in a frame which may be pivoted. In the form shown, the strut is extended by a sprocket wheel h engaging with one chain and driven by worm gear from a handle l. Alternatively, the driven member f, such as a windscreen may be moved by hand and held by a member q spring-pressed against one or both chains. More than two chains may be used, the inner ones having engaging means at both edges. The strut may be stiffened laterally by webs p on the outer links a, Fig. 9. The webs interlock to form a reinforcing rib.
Patent GB-658729-A (GB)
Title: Power saw chain
IPC: B27B33/14
Filed: 1949-07-11
Abstract: 658,729. Sawing. DEHN, S. G. (Oregon Saw Chain Manufacturing Corporation). July 11, 1949, No. 18291. [Class 145(ii)] A power chain saw comprises links 10 having projecting roots 11 to engage the sprockets of the drive, side plates 18, 19 connecting the links 10 one, 19, of each pair of side plates being constructed as a sawcutting tooth in which the upper part of the plate 19 is curved outwardly to form a curved shank 32 and then bent inwardly so as to lie substantially horizontally to such an extent that the saw tooth projects equally on each side of the plate 19. The side plates 18, 19 are rigidly riveted together against shoulders on the rivet pins which however form pivots for the links 10. The toe 33 and the upper face of the tooth are both laid back somewhat to provide cutting clearance, the cutting edges being bevelled. A depth. gauge 22 is provided on the tooth plate 19 to determine the depth of cut 62 as indicated in Fig. 11. This gauge however may be part of a link instead of the tooth plate. To sharpen the tooth a cylindrical file is disposed in the recess between the gauge 22 and the tooth the angle of movement of the file being arranged at about 45 degrees to the plane of the side plates.
Patent GB-573348-A (GB)
Title: Improvements in or relating to thermionic valve circuits
IPC: H03F1/04
Filed: 1943-11-05
Abstract: 573,348. Thermionic valve circuits. HADFIELD, B. M. Nov. 5, 1943, No. 18359. [Class 40 (v)] [Also in Group XXXV] A valve having an electrode screening another electrode in the path of the electronic current, is adapted to function as a valve with a reduced number of electrodes by connecting the two electrodes together by a resistance and and making the effective anode connection to the junction of the screen electrode and the resistance, so that the total electrode dissipation of the valve may be substantially increased. The value of the resistance is equal to the anode resistance of the valve divided by a factor corresponding to the ratio of the maximum working cathode current to the cathode current when the grid cathode potential is zero. In this way, a pentode or tetrode valve may be used as a triode amplifier. As a cathode follower, low-frequency amplifier, Fig. 2 (not shown), an output of five times that obtainable without the resistance may be obtained. Fig. 3 shows the application to a cathode follower used as an electronic voltage stabilizer. In this arrangement, a low impedance source, is provided and the stability is increased since the output voltage includes a term 1/Á times that of the supply voltage where Á is the amplification factor of the valve. The output may be taken across the anode resistance R or across the cathode resistance L3. If the supply is derived from some form of gas discharge tube stabilizer device and a voltage proportional to the change in output is applied to the control grid in place of the voltage E, an output almost completely independent of supply voltage variation may be obtained, and the permissible dissipation of the valve can be raised five times by the provision of the resistance according to the invention. A voltage e1 may be derived proportional to changes in output voltage to increase the stability. Fig. 4 shows the application to a rectifier, in this arrangement the control grid may be connected to the cathode through a limiting resistance or the grid may be omitted. Specification 162,773, [Class 40 (v)], is referred to.
Patent GB-707760-A (GB)
Title: Improvements in or relating to selector circuits for use in automatic telephone-exchange and like systems
IPC: H04Q3/52
Filed: 1951-08-03
Abstract: 707,760. Automatic exchange systems. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Aug. 3, 1951 [Aug. 8, 1950 ; Oct. 11, 1950], No. 18405/51. Class 40 (4) In a switching arrangement for connecting a common point of an incoming line over a gas-discharge tube to a free one of a number of common points and in which the firing of the tube makes the connection and busies the associated common points which are connected to opposite poles of a voltage source, the incoming line terminates in one winding of a transformer whose other winding is connected between the corresponding common point and pole of the voltage source. When a subscriber Ab1, Fig. 2, lifts his receiver, a pulse tapped from the primary or as shown the secondary winding of the line transformer T1 is applied to the triggers of the gas-discharge triodes g1a, g1b connected to the common point P1. When say gla leading to a free link VCa fires, the potentials of the common points P1, Qa are changed to prevent any further tube connected thereto being ignited. At the same time the triggers of the tubes gla, glb have their biasing potentials lowered and a negative pulse fed to them over condensers C11, C12 to prevent double connections. The triggers of the tubes gla, glb, may be connected to different tappings on a potentiometer R12, R13 to give an order of preference to the links VCa, VCb. In a modification the calling pulse is applied to the cathodes of the tubes and the anodes and triggers are biased from the link circuits so that a tube associated with a free link circuit fires whereupon a negative pulse from the anode circuit is fed to the triggers of the tubes to which the calling pulse was applied. In a combined preselector and final selector, Fig. 3, after a free link VCa has been seized by a calling line Abl, the dialled impulses cause a marker MSa to raise the potential of a lead, say M3a, which, providing the called line Ab2 is free, fires a tube g2a to complete the talking connection. To prevent tube gla extinguishing when g2a fires, a thermistor RT1 having a negative coefficient is included in the cathode circuit of gla. The tubes are extinguished by positive pulses resulting from replacement of the receivers. To prevent false release, the impulsing contacts are shunted by a capacitor or resistor to reduce the dial pulses. Alternatively it is arranged that the pulses resulting from breaking the loop are insufficient to extinguish the tubes, the release pulse being generated by a device in the' link circuit which responds to a positive pulse only when it is not followed by a negative pulse.
Patent GB-604122-A (GB)
Title: Construction of floors or roofs of concrete cast in situ
IPC: E04C5/065
Filed: 1944-09-27
Abstract: 604,122. Casting concrete floors in situ; beams. TRUSSED CONCRETE STEEL CO., Ltd., and GREEN, D. H. Sept. 27. 1944, No. 18499. [Classes 20(ii) and 20(iv)] Means to enable a ribbed and reinforced concrete floor to be poured in situ comprise spaced lattice beams laid parallel to one another and carrying timber fillets 6 along their lower sides, plates 10 removably mounted on the fillets and projecting laterally from the beams and inverted trough shutters 11 of flexible material such as pressed steel resting with their edges on the plates of adjoining beams. Concrete is poured in to cover the lattice beams and the tops of the shutters; when it has sufficiently set the plates 10 are removed and the shutters 11 can then be withdrawn, the fillets 6 remaining and serving for the attachment of a suspended ceiling. The beams, of the kind described in Specification 587,776, comprise zig-zag bent rods 1, 2, welded at their corners between rods 3, 3', and 4, 4<1>, the two ladders thus formed being united by welded pins 7 at the top and 5 at the bottom, the latter passing through holes in the fillets 6, which are gripped tightly between the rods 3 and 4. The beams may however be of triangular section with the rods 3<1> and 4<1> welded directly together. The plates 10 which may be of any desired length, or short plates fixed at intervals, have upstanding ribs 12 to fit under the recessed edges of the fillets, and edges 13 bent up at an angle of about 20 degrees, to assist in locating the outwardly turned flanges 14 of the shutters 11. The shutter may be made in relatively short sections, with one end of each section offset so as to overlie the end of the adjoining section.
Patent GB-181250-A (GB)
Title: Improvements in or relating to pliers
IPC: B25B7/22
Filed: 1921-07-08
Abstract: 181,250. Wynn, Timmins, & Co., Ltd., and Lewis, T. B. July 8, 1921. Reamers.-Pliers for use by electricians, plumbers, &c. have the nose of the pliers made in the form of a reamer by providing cutting grooves or edges on the backs of the jaws so as to adapt them for removing the internal burr from steel &c. conduit tubes for electric wires and for spreading and countersinking the ends of lead pipes. The jaws 2, Figs. 1 and 3, having the usual wire &c. cutters 1, 3, are each provided with a singlereamer cutting edge 5. Or a series of cutting grooves 7, Fig. 6, may be formed along the corners of the backs of the jaws. In a further modification, the jaws of round-nosed pliers are grooved to form cutting teeth 8, Fig. 9, of substantially V-shaped cross-section.
Patent GB-692994-A (GB)
Title: Improvements in and relating to emergency electrical generating sets
IPC: H02J1/16
Filed: 1949-07-13
Abstract: 692,994. Emergency supply systems. CUNY, A. July 13, 1949, No. 18524/49. Class 38 (iv). An emergency dynamo-electric machine 1 coupled to a fly-wheel 2 and normally motoring from a supply S immediately takes over supply to a load upon failure of supply S, the failure also causing closure of a switch 8 for energizing a starter motor 7 of a prime-mover 13 which, when running at approximately the same speed as the machine 1 is coupled to, and continues to drive, the machine. In the system shown, coupling is effected by a clutch 4, 11, the two parts of which are engaged after a delay, imposed by a time switch 15, sufficient for the prime-mover to reach the speed of the machine 1. In another system the clutch and time switch are replaced by a freewheel connecton between the fly-wheel and prime-mover. Power for the starter motor may be provided by an exciter 5, the machine 1, a battery charged from the supply S over a rectifier, or by an auxiliary fly-wheel-driven generator normally maintained in rotation by an electric motor.
Patent GB-1424264-A (GB)
Title: Process for grinding roasted coffee beans
IPC: A23F5/08
Filed: 1973-07-20
Abstract: 1424264 Grinding coffee PROCTER & GAMBLE CO 20 July 1973 18570/74 Divided out of 1424263 Heading A2B Roasted coffee beans are contacted with liquid nitrogen and ground in the presence of the liquid nitrogen. The product may be used in the preparation of instant coffee.
Patent GB-1368659-A (GB)
Title: Air cushion for transportation safety devices and method of producing  them
IPC: A47C27/08
Filed: 1972-04-21
Abstract: 1368659 Inflatable articles UNIROYAL AG 21 April 1972 [3 May 1971] 18600/72 Heading D1K [Also in Division A4] Air cushions are formed from two superposed woven fabrics which are woven together along the selvedges 21, 22 and in spaced weftwise strips 26, 27 to form closed bags 23, 24, 25 which are separated along lines 28, 29, and externally coated before or after separation, with rubber or plastics material, an inflation valve being incorporated in one of the fabrics. The yarns may be thermoplastic and the bags can be separated by heat, which simultaneously fuses the edges. Handles (7) Fig. 1 (not shown) may be attached to the edges of the bag by eyes (6).