baber/WOPTO huggingface dataset:
Patent GB-642773-A (GB)
Title: Improvements in or relating to a process for preparing metal powders for the purposes of powder metallurgy from copper and iron containing ores
IPC: B22F9/22
Filed: 1947-12-29
Abstract: A method of producing metal powders from copper and iron containing ores is characterized in that the ores are first transformed into oxides of the metals and are then reduced at temperatures so low that fine grained metal powder is obtained, the powder being separated from gangue and unreduced metal oxides in known ways, e.g. by flotation or wind-sifting.  By reduction at 250 DEG C only copper oxide is reduced and can be separated from the remaining material. By reduction at 900 DEG -950 DEG C a mixture of iron and copper powders is produced.  The mixture may be separated as such or after annealing at the same temperature for two hours in an inert atmosphere, copper can be separated from iron and other material by flotation in an acid liquid.  The remaining iron powder can be dried and separated magnetically from unwanted material.  Specification 321,685, [Class 82(i)], is referred to.
Patent GB-1272704-A (GB)
Title: Gas blast circuit interrupter having conducting orifice means
IPC: H01H33/915
Filed: 1970-07-17
Abstract: 1,272,704. Gas blast circuit breakers. MERLIN GERIN. 17 July, 1970 [12 Aug., 1969], No. 34708/70. Heading H1N. In a gas blast circuit breaker, especially of the puffer type using SF6, arcing contacts 26, 36 move within an orifice 22, a part 50 of which is conductive and electrically connected to the contact 36, and to which part the arc formed during the opening operation transfers from contact 36. In Fig. 2 the orifice 22 comprises a part 50 of conductive material having a restricted part 38, and an insulating part 52; the orifice, the resiliently mounted arcing contact 26 and the main contact 44 being mounted on a piston 18 movable within cylinder 10. The part 50 is connected to contact 36 via slides 46 and the tubular main contact 40. An arc drawn between the arcing contacts is transferred from contact 36 to the throat 38 of the orifice and is then extinguished, by the gas blast through orifices 24 in the piston 18. The resistance of the arc path may be increased by making part 50 of resistive material, or by providing an external resistance, e.g. a wound resistance in tube 40. The slides 46 may be mounted on the part 50 and engage a further tubular contact instead of the main tubular contact, Fig. 3 (not shown). The orifice and contact member 26 may be fixed and the contact 36 movable with the piston. The arcing contacts shown as abutting could be replaced by sliding contacts, e.g. of the plug- and-socket type.
Patent GB-1312352-A (GB)
Title: Dehydrated products of potatoes or other like raw materials
IPC: A23L19/15
Filed: 1970-07-17
Abstract: 1312352 Dehydrated potato product G WILKE 17 July 1970 [17 July 1969] 34884/70 Heading A2D Producing a potato product for use in making dumplings comprises forming a moist dough from uncooked or partially cooked potato and passing the dough through a rolling mill in which each subsequent roller runs faster than the preceding roller and transferring, by means of a scraper blade, the moist compacted film formed on the last roller onto the surface of a belt upon which the dough is dried until its surface is compacted and loamy, and has a flake-like or scale-like structure. The dried dough may be comminuted into small particles. The dried dough may be mixed into a dough with water, kneaded, granulated and dried, e.g. in a vacuum, to form expanded and porous granules. The dough may contain semolina. or other starch or albumen containing materials, or spices or mixtures thereof.
Patent GB-504452-A (GB)
Title: Improvements in terminals for electric condensers
IPC: H01G13/00
Filed: 1938-11-30
Abstract: 504,452. Terminals. MALLORY PATENTS HOLDING CO., Ltd. Nov. 30, 1938, No. 34907. Convention date, April 14. [Class 38 (i)] A terminal for a condenser electrode consists of a thin metal strip having one end 11 thickened and provided with longitudinal folds. This formation may be produced by a die 13 applied to the edge of the ship inserted in a slot 16. The strip may be integral with the electrode as shown in Fig. 7 or it may be applied to the electrode by punching and riveting as in Fig. 6. In the case of electrodes formed of fabric sprayed with metal, the terminal may be clamped between two such sheets 33, 34 and be double-ended as shown in Fig. 9. The flat portion of the terminal may be scalloped at its edges.
Patent GB-670952-A (GB)
Title: An improved apparatus for the drying or warming of webs of material
IPC: F26B13/10
Filed: 1947-12-31
Abstract: 670,952. Drying webs. LODDING, H. Dec. 31, 1947 [Nov. 22, 1944], No. 35083/47. Class 34(i) Apparatus for drying webs has a number of air discharge slots and a number of air suction slots arranged in spaced relationship and in alternate succession, the slots being parallel to the web and at right angles to its direction of movement and guide walls or surfaces are arranged between adjacent slots parallel to the web. As shown, a number of drums 1 of triangular cross-section are arranged transversely of the length of material a being dried. The sides 3 of the drums having longitudinal slots 2 are arranged at the same level and are parallel to the web and the drums are at a distance from each other so that openings 5 are formed parallel with the slots 2. The drums 1 form a roof to the collecting chamber 6, one wall 7 of which has openings 8 connected to the suction side of fans 10, these fans delivering the air into a header 11 to which the drums are connected. Air circulated by the fans flows from the header 11 through heating ele-` ments 12 into the drums to be discharged through the slots 2, the active length of which can be adjusted by means of movable screens 13, and on to the material a, returning to the fans via the slit openings 5 to be recirculated, the portions of the sides 3 adjacent the slots forming guide surfaces for the air. In a modification four drums are arranged parallel to each other and in a circle so that the outer walls of the drums form a cylindrical surface around which the material passes on a cylindrical frame which rotates. In another modification the material passes around the drums on rollers. In further modifications a number of the cylindrical types of apparatus are arranged in a single chamber or casing.
Patent GB-155271-A (GB)
Title: Improvements in or relating to automatic weighing machines
IPC: G01G13/00
Filed: 1920-12-14
Abstract: 155,271. Naamlooze Vennootschap D. de Clercq's Bureau voor Technisch Nieuws. April 1, 1919, [Convention date]. Automatic-feed weighers.-Relates to an automatic-food weigher of the kind wherein the feedgate is closed in intermittent steps by the successive closure of electric contacts, and consists in arranging the contacts on the weigh-beam and on a lever which is automatically raised by the weigh-beam to close the contacts successively. The material from a supply hopper 24 falls into a conical weighing-receptacle 9 broadening towards the base and closed by a pivoted discharge plate 6. The receptacle is carried by a beam 1, above which is arranged a two-armed lever 21 carrying adjustable electric contacts 19, 20. When the beam tilts and closes the contact 19, a solenoid 47 is energized, thus drawing back a catch 39, liberating a pawl 37, and allowing a spring 36 to rock a shaft 35 until a second pawl similar to 37 engages a second catch 40. This movement turns the feed-gates 29, 30 so as to reduce the feed. Further tilting of the beam 1 rocks the lever 21 until the second contact 20 is closed, whereupon a second solenoid 48 and a third solenoid 16 are energized. The solenoid 48 withdraws the second catch 40 from the second pawl and allows the spring 36 to complete the closure of the feedgates 29, 30. The solenoid 16 withdraws a catch 11 from engagement with the discharge plate 6, and the weighed material is discharged into a receptacle 52. Springs 41, 13 return the catches. A rotating disc 50 with a projecting pin 51 is timed so as to depress a lever 34 (rigid with the pawls 37) after each weighing, and thus to re-open the feed-gates to initiate another weighing. A sliding weight 22 and a counterbalance weight 53 may be adjusted to vary the duration of the reduced feed. Stirrers 26, 27 are provided. The feed-gates may be arranged to close in more than two stages
Patent GB-1500156-A (GB)
Title: Semiconductor injection laser
IPC: H01S5/20
Filed: 1975-08-26
Abstract: 1500156 Semi-conductor lasers RCA CORPORATION 26 Aug 1975 [6 Sept 1974] 35177/75 Headings H1C and H1K In a stripe electrode double heterostructure semi-conductor laser, the P-type semi-conductor region 24 in which the stripe electrode 46 is provided is electrically and thermally connected to a heat sink 58 by a soft ductile material 60 such as indium or a gallium or mercury alloy, while the radiation-emitting ends 20 of the semi-conductor are sealed against the ingress of moisture. For sealing, the end surfaces of the semi-conductor may be coated with an electrical insulating material 56 such as an aluminium oxide, or the laser may be encapsulated in a transparent housing or a housing provided with windows. The semi-conductor is epitaxially grown in an oxygen-free atmosphere, and comprises a GaAs substrate 28, an N-type GaAs layer 30, an N-type GaAlAs layer 32 providing an optical confinement boundary 40, a P- or an N-type GaAlAs active layer 26, a P-type layer 34 providing an optical confinement boundary 42 and a P-type GaAs layer 36. The active layer 26 may be doped with silicon or germanium, and the other layers doped with tellurium, tin, or germanium. Spaced insulating strips of SiO are formed on layer 36, and a zone 38 of the layer between the strips is highly doped by zinc diffusion to provide a conductive stripe region on which a compound electrode 46 is formed. Preferably electrode 46 comprises a titanium or chromium layer 48, a platinum or nickel layer 50, and a gold layer 52. An electrode 54 of the same character or of a single metal such as tin is provided on the substrate 28. A semi-conductor laser body is formed by cleaving from a larger wafer on which end surface protective coatings 56 have previously been applied.
Patent GB-467516-A (GB)
Title: Improvements in loudspeakers or the like
IPC: H04R11/02
Filed: 1935-12-19
Abstract: 467,516. Sound-reproducers. DITSCHE, W. Dec. 19, 1935, No. 35214. Convention date, Dec. 19, 1934. [Class 40 (iv)] In a sound reproducer, a diaphragm, which is in the form of a cone, pyramid or wedge and which may be truncated, is driven at its periphery in a direction extending along the wall of the diaphragm, or approximately so, towards the real or virtual apex of the cone or pyramid or towards the real or virtual ridge of the wedge. When the cone or pyramid has walls which curve away from or towards the axis, as indicated in Fig. 5, the driving force acts along a line K lying between the tangent K<3>-K<3> at the point of coupling K<c> and the line K<4>-K<4> joining the point of coupling to the real or virtual apex of the cone or pyramid in a plane containing the diameter through the point of coupling and the line joining the point of coupling to the real or virtual apex. In the case of a wedge having curved walls, the direction of the line of force lies between the tangent plane at the point of coupling and the plane containing the ridge and the point at which the driving unit is coupled. As shown in Fig. 2, the line of action of the drive 4 by an electromagnetic unit 5, 6 is directed towards the apex of the conical diaphragm 1 which is mounted in a baffleboard 3 by a ring 2 of leather. A portion of the diaphragm is damped by cotton-wool padding 8 which is retained in position by metal clamps 7. The diaphragm may be driven peripherally by two or more units adapted to reproduce different bands of frequencies, Fig. 6 (not shown), or the diaphragm may be driven at its periphery by an electromagnetic (moving-armature) unit and at its apex by a moving-coil unit, Fig. 7 (not shown). ,
Patent GB-995250-A (GB)
Title: Circuit arrangement for telephone stations with amplifiers fed via the subscriber's line
IPC: H04M1/60
Filed: 1961-09-29
Abstract: 995,250. Substation circuits. STANDARD TELEPHONES & CABLES Ltd. Sept. 29, 1961 [Oct. 8, 1960], No. 35242/61. Heading H4K. In a substation with a normally connected subset, a key is provided to disconnect the microphone and receiver of the subset and connect in their place a transmit-receive circuit with amplifiers powered over the exchange line, it being arranged that operation of the key to change the connections momentarily connects a low resistance loop across the exchange line. The arrangement provides a reliable seizing signal over the exchange line to operate the line relay. Once the changeover key is operated the subscriber may use the dial of the normal subset without taking down the handset. As shown, the normally connected subset has a microphone M and receiver H, a hook switch GU and impulsing and off-normal contacts nsi, nsr, and nsa. The changeover key has contacts F1, F2, F3, of which F2 and F3 hold when the key is thrown but F1 operates momentarily on the overthrow to connect a short circuit or a low resistance R across the exchange line a, b. Contacts F2 and F3 connect the exchange line and impulsing circuit for service with microphone M1 and amplifier SVr, and loudspeaker L and amplifier EVr, over windings I, II, and III of a hybrid U2. The D.C. supplied over the line is stabilized by a Zener diode Z together with a choke Dr and capacitor C. The hybrid is balanced with a network N1. In place of the momentary actuation of the overthrow contact F1 a discharge tube may be employed which is triggered into conduction, when the changeover key is operated, by discharging a capacitor fed from the exchange line.
Patent GB-1055329-A (GB)
Title: Rollers for use as inking rollers or the like on rotary printing machines
IPC: B41F31/26
Filed: 1964-08-27
Abstract: 1,055,329. Rollers. MASCHINENFABRIK AUGSBURG-NURNBERG A.G. Aug. 27, 1964 [Sept. 6, 1963], No. 35251/64. Heading F2U. An ink or like roller for a printing machine comprises concentric thin-walled tubes 1. 2 connected by transverse and axially extending webs 3, 4. The webs have slots 5 so that the webs can be connected together at the slotted places. The webs are of light metal or cardboard, and may be of honeycomb formation and are connected to both tubes by welding, soldering or gluing. End closures are provided by hollow roller stubs inserted into the inner tube 2 and connected to the outer tube.
Patent GB-394333-A (GB)
Title: Improvements in and relating to the delustering of fibres or fabrics consisting of or containing cellulose acetate
IPC: D06M13/188
Filed: 1931-12-21
Abstract: Fibres or fabrics consisting of or containing cellulose acetate are treated with sulphuric acid, preferably of 3-6 per cent strength, and after removing the acid the materials are delustred in known manner without applying tension.  The delustring agent may be boiling soap solution, which may contain a little phenol. Specification 394,332 is referred to.
Patent GB-1080749-A (GB)
Title: Improvements in or relating to rotary electric machines
Inventor: RAWCLIFFE GORDON HINDLE
IPC: H02K3/28
Filed: 1964-11-06
Abstract: 1,080,749. Pole-changing machines. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Oct. 19, 1965 [Nov. 6, 1964], No. 45380/64. Heading H2A. In a pole-changing, synchronous, salient-pole machine in which the pole-changing of both members is by pole-amplitude modulation, each phase of the armature winding is made such that its winding factor is low to the harmonic flux. This may be done by grouping the coils of the winding. Thus, in the example described, the unwanted harmonics produced by an 8/10 pole, salient-pole field system (Figs. 3(a) and 3(b), not shown) are 12-poles and 6- poles respectively. In the 18-slot frame described (Fig. 5, not shown) the angles between successive slots for these harmonics are 120 degrees and 60 degrees respectively, so that their vectorial sum is zero (Fig. 6, not shown). Alternatively, the winding may consist of two or more component sections, the winding factor of each separately is not zero to the harmonics, but they are so spaced that the winding factor is zero for the composite winding. Thus, if a 24-slot winding having a high winding factor to the harmonics is used, it is possible to use three of these in a 72-slot frame so spaced that the overall factor is zero. In addition, the winding coil pitch may be chosen to reduce harmonics, and third harmonics may be eliminated by making both pole-numbers star-connected.
Patent GB-314509-A (GB)
IPC: D05B29/00
Filed: 1928-12-01
Abstract: 314,509. Union Special-Maschinenfabrik. Ges. June 29, 1928, [Convention date]. Sewing-machines; presser-feet; thread-cutters and holders.-A presser has a pair of separate fabric-engaging portions between which is an independently resilient enchained-stitch-engaging portion and a cutting blade. The fabric-engaging portions 12, 13 are carried by presser-bars 14, 15 and the portion 13 has a needle slot. These portions pivot respectively on bolts 17, 16 to allow tilting when fabric enters below them. The enchained-stitch-engaging part 18 is situated between the parts 12, 13 and is resiliently mounted on a pin 19 in a casing 20 containing a spring 21 so that it is pressed down on the chain of stitches independently of the fabric-engaging portions 12, 13. An auxiliary feed-dog 9 co-operates with the part 18 for feeding the chain of stitches, and a bridgepiece 10 on the throat-plate 1 also has teeth on its upper face so as to hold the chain during cutting by the blades 23, 24, and to hold the end when out. The blade 23 is fixed and the blade 24 is mounted on a manually operable lever 25.
Patent GB-858270-A (GB)
Title: Process for the preparation of hydrocarbon mixtures suitable for use as premium gasoline
IPC: G21C3/64
Filed: 1959-10-20
Abstract: Premium gasoline is obtained by reforming over a platinum catalyst in the presence of hydrogen a straight run gasoline having an initial boiling point of not more than 70 DEG  C. and an end point of not more than 150 DEG  C. to obtain a reformate having an octane number (research, clear) of at least 100 and removing by distillation not more than 20% by weight of the higher boiling materials to obtain a final product of octane number at least 99 and a volatility of at least 47% by volume recovered at 100 DEG  C. Reforming may be effected at 500-550 DEG  C. up to 30 atmospheres absolute, 0,5-2 vol../vol/hr. 3-10 molar hydrogen to hydrocarbon ratio in the presence of up to 0,03% by volume water vapour and 10 p.p.m. halogen. Specification 793,924 is referred to.
Patent GB-464654-A (GB)
Title: Improvements in and relating to pocket handkerchiefs
IPC: A41B15/00
Filed: 1935-12-24
Abstract: 464,654. Pocket - handkerchiefs. FEILER, M. Dec. 24, 1935, No. 35671. Convention date, Oct. 26. [Class 141] A pocket-handkerchief consists of an inner layer of moisture-absorbing material such as fibrous cellulose, and an outer sheet of impervious material, the outer sheet being provided with a flap 6 which, when the handkerchief is folded so that the impervious layer forms the outer surface, serves as a closure flap for the pocket so formed. The flap, which may be formed integrally with the outer sheet, or may be adhesively attached, tucks under a strip 7 when the pocket is closed. The fibrous cellulose may be reinforced by a thin layer of mull, or may be replaced by a washable fabric. The outer sheet may be of regenerated cellulose, cellulose esters or ethers, or paper impregnated with regenerated cellulose. The layers may be united by clips, e.g. of metal, or the marginal edges of the outer sheet, or portions thereof, may be folded over the somewhat smaller fibrous sheet and stuck thereto.
Patent GB-1522032-A (GB)
Title: Discs for fan impellers
IPC: F04D29/28
Filed: 1975-08-29
Abstract: 1522032 Transverse-flow fans K O L  WALLMAN 29 Aug 1975 [30 Aug 1974] 35753/75 Addition to 1431680 Heading F1C [Also in Division B3]  In a fan impeller disc according to claim 1 of the Parent Specification, a recess 14, Fig. 1, is formed near the mouth 4 of each opening 3 and at the side of the opening opposite the projection 10, the width of the opening in this region being greater than the widths of the mouth and of the inner portion of the opening which is adapted to receive the blade 8, so that when the projection is deformed, material included in the projection will be displaced into the recess past the outer edge 24 of the blade. The recess 14 comprises an edge 15  extending obliquely from the periphery 2 of the sheet-metal impeller disc 1 so as to face inwardly towards the edge 12 of the opening 3 and away from the mouth 4, and an edge 16 which faces outwardly towards the mouth and is joined to the other edge 19 of the opening by a curved edge 18 against which a correspondingly curved face of the blade abuts. When the projection 10 is deformed to form an insert 25 substantially filling the recess 14, its corner 13 meets the corner 17 of the recess. The deformation is effected by one or more rollers 22 which are adjusted radially inwardly while the impeller assembly is rotated. After deforming the projections 10 into the recesses 14, the rollers 22 act on the entire periphery of the impeller disc to compress it. The rollers 22 have a U-shaped profile so that a circumferential reinforcing bead 26 is formed. The sharp corners 13, 17 may be replaced by curved ones as shown in Fig. 2.
Patent GB-1394526-A (GB)
Title: Work transporter
IPC: B65G37/00
Filed: 1973-07-26
Abstract: 1394526 Work benches H T & M CONSTRUCTION CO Ltd 26 July 1973 35756/73 Heading B4X [Also in Division B8] A work transporter, e.g. for feeding garments to and from a series of machinist stations 13 ... 18 (Fig. 1), comprises horizontal upper and lower conveyer runs 10, 11, (Fig. 2), a plurality of work receiving stations, e.g. 21, 22 (i.e. one for each machinist) spaced apart alongside the conveyer, means (not shown) for directing work from the upper conveyer run on to each work receiving station, control means for the conveyers and work directing means, and a cover, e.g. 36, 37 or 38 over the upper conveyer run adjacent each station the cover also overlying the work receiving station and providing an extended working surface. The upper surface of each cover may be flat and coplanar with the machinists working surface 40, 41 or may be raised or domed as at 43 (Fig. 2) but merging with the surfaces 40, 41. Adjacent each work receiving station is a work holding station comprising a platform 28 which is mounted on pivotal arms 29 and urged by spring 31 to the upper position, latching means 32 being provided for securing the platform in the upper or lower positions. Spring 31 is such that a full workbox 33 will automatically lower the platform when unlatched to its lower position whereupon the workbox can be transferred to the lower conveyer run.
Patent GB-1182807-A (GB)
Title: Thermoplastic Polymeric Compositions
Inventor: HUNT PATRICK ARTHUR
IPC: C08L33/12
Filed: 1967-08-03
Abstract: 1,182,807. Thermoplastic compositions. IMPERIAL CHEMICAL INDUSTRIES Ltd. 26 July, 1968 [3 Aug., 1967], No. 35762/67. Headings C3P and C3R. A dry composition comprises as the polymeric ingredients, a blend of polymethyl methacrylate and a thermoplastic polyaryl carbonate. A small amount of a rubbery polymeric material may also be incorporated in the composition. In the examples, commercial polymethyl methacrylate (a copolymer of methyl methacrylate and ethyl acrylate or n-butyl acrylate), a copolymer of methyl methacrylate/N-orthochlorophenyl maleimide/styrene, a polymer blend of a methyl methacrylate/styrene copolymer and a cross-linked polybutylacrylate, a polymer blend of a methyl methacrylate/ethyl acrylate copolymer and a cross-linked polyethylacrylate rubber or a cross-linked copolymer of butyl acrylate and styrene, were each mixed with a commercial polycarbonate (based on bisphenol A) and a sheet moulded from the resultant blend. The products have improved softening points.