baber/WOPTO huggingface dataset:
Patent GB-1346444-A (GB)
Title: Rotary vane compressors
IPC: F04C27/00
Filed: 1971-06-21
Abstract: 1346444 Rotary positive - displacement compressors TRW Inc 21 June 1971 [22 June 1970] 29006/71 Heading F1F A refrigerant compressor 20 has a vaned rotor 47 engaging with a pressure-loaded sealmember 106 lodged in an axial groove 100 within a fixed cylinder 28 and extending between end caps 22, 24. The member 106 has grooves 120, 121 on its leading and radially outer faces giving high-pressure fluid access to its outer face. Pressure-relief bores controlled by a reed valvemember, Figs.4 and 5 (not shown), extend from the groove 100 to the outer surface of the cylinder. The radially inner face of the member 106 is inclined so as to prevent fouling of shoes 55 on the rotor vanes 53, which slide radially and are coupled in diametral pairs by pins 61 carrying springs 63. The grooves 121 may be inter-connected by grooves 125. Alternatively, the outer face of the member 106 is separated from the groove bottom by beads on said face, Figs.14 and 15 (not shown), the grooves 121 being omitted. Outlet-bores 62 are controlled by a reed valve-member, Fig.3 (not shown), and communicate with an outlet 78 by way of a port 71 and a porous annular demister 74. Liquid lubricant collected at the bottom of a space 73 is returned to a bearing 40 through ducts in the cylinder and cap 22, Fig.13 (not shown), by the outlet pressure. Bores 65 controlled by a reed valve-member allow liquid refrigerant and lubricant to escape when the compressor starts, the valve member being held down thereafter by the outlet pressure. An inlet opening 81 in the cap 22 communicates with an inlet 79 comprising a check valve, Fig.11 (not shown). The compressor may be mounted horizontally as shown in Fig.1 such that the aforesaid ducts communicate with the lowest part of the space 73 or with the rotor shaft 35 vertical and a housing 21 lowermost.
Patent GB-291090-A (GB)
Abstract: 291,090. Levey, W. H. May 7, 1928. [A Specification was laid open to inspection under Sect. 91 of the Acts, May 29, 1928]. Two-stroke-cycle engines; driving-gear.-In an engine wherein the explosion takes place between a main piston 1 and a scavenging and charging piston 2 the big-ends of the connecting rods of both pistons work on eccentrics 9, 8 mounted free to rotate on the crank-pin 12. A pinion 11 integral with the composite eccentric 9, 8, rolls inside a stationary internally toothed wheel 13; as shown the gear ratio is three to one but it may have other values. As the crank shaft revolves the eccentrics rotate about the crank-pin alternately adding to or subtracting from the movement of the pin; in consequence after an explosion has taken place and during the first 90‹ of movement of the crank pin, the piston 2 remains still. During the next 90‹ and also the following 90‹ the eccentric 8 adds its throw to the movement of the crank-pin and the piston 2 moves rapidly down on its scavenging and then up on its charging stroke. During the last 90‹ of the crankpin movement the piston 2 is stationary. The eccentric 9 causes augmentation of movement of the main piston during the first and last quarter revolution and retardation of movement during the remaining half revolution. The crank chamber may be used to compress air for scavenging, this air entering the cylinder through the piston-controlled port 19. Mixture enters the top of the cylinder through the valve 15 on the down stroke of the piston 2; it is compressed on the up-stroke and delivered through the spring-controlled valve 3 in the piston to the combustion chamber between the pistons.
Patent GB-1514430-A (GB)
Title: Fabric
IPC: D03D15/00
Filed: 1976-07-13
Abstract: 1514430 Suede pile fabrics KURARAY CO Ltd 13 July 1976 [14 July 1975 2 April 1976] 29132/76 Heading DIK A suede woven fabric has a warp of polyester textured yarn, polyester filament yarn or polyester spun yarn and as a weft polyester island filaments randomly distributed whose mean thicknesses are in the range 0.05 to 0.50 denier and whose degree of thickness variation is in the range 15 to 60% in which a portion of the island filaments is raised to form piles of island mono filaments whose lengths are in the range 0.5 to 4mm, the number of floating points on weft yarns whose numbers of floats are in the range 3 to 11 is in the range 100 to 500 per sq. cm of woven fabric and the relation between the shear stress 90.5 at a shear angle of 0.5 and the shear stress 90.5 at shear angle of 5 represented by 95/90.5 is in the range 1.5 to 15.
Patent GB-744167-A (GB)
Title: Improvements relating to loudspeakers
Inventor: FOUNTAIN GUY RUPERT
IPC: H04R1/34
Filed: 1952-11-19
Abstract: 744,167. Loud-speakers. TANNOY, Ltd. Nov. 11, 1953 [Nov. 19, 1952], No. 29256/52. Class 40 (4). [Also in Group XXXVIII] In a horn-type loud-speaker the mouth lies on the surface of a right cylinder having a vertical axis, and is divided into axial sections 6, 12 and 20, each communicating with the corresponding one of the coaxial throats 3, 4 and 5 extending along the axis from a sound power unit 1, the throats being so designed that the sound waves emerging from the different sections are substantially of equal amplitude and in phase, so that the loudspeaker radiates sound mainly in a horizontal plane. As shown, the path lengths from the sound power unit 1 to the sections of the mouth nearer to that unit are increased by providing baffles such as 13, 21 so as to make the lengths of the paths to all sections equal. Two loud-speakers each constructed as shown may be arranged adjacent to, and coaxially with, each other to form a loud-speaker assembly, which is supported on the trunnions 35 in a U-shaped frame 36 so that the upper loud-speaker may readily be swung into the lower position for ease of access to its sound power unit for maintenance purposes. Instead of making the path lengths to the sections equal, it may be arranged that the paths are of such lengths that the phase difference between adjacent sections is constant, in which case the loudspeaker will emit sound mainly between the surfaces of two cones coaxial with the cylinder.
Patent GB-1118942-A (GB)
Title: A process for obtaining purified glutamic acid
IPC: C07C227/00
Filed: 1965-07-09
Abstract: A process for obtaining purified glutamic acid comprises keeping, with or without agitation, a slurry of an aqueous solvent (defined below) and crude optically active glutamic acid crystals consisting of, or containing, the a -form thereof at a temperature of 50 DEG  to 120 DEG  C. for a sufficient time to transform the a -form content into the b -form, and then separating the resulting crystals. "Aqueous solvent" includes only water, aqueous lower alcohols, such as aqueous methanol and aqueous ethanol, and aqueous monosodium glutamate solutions.
Patent GB-402922-A (GB)
Title: Improvements in and relating to methods of making carton blanks and carton blanks obtained thereby
IPC: B31B50/16
Filed: 1932-10-19
Abstract: 402,922. Cartons. DALLER CARTON CO., Inc., 405, Lexington Avenue, New York, U.S.A. Oct. 19, 1932, No. 29286. Convention date, March 12. [Class 18.] Carton blanks are formed from successive portions of a sheet 209 in head to tail relation so that the greater part of the adjacent portions of successive blanks is formed by a common cut with the adjacent portions of adjoining blanks interfitting over the greater part of their outline with the box section 210 of one blank exactly opposite the cover section 213 of an adjoining blank. The pasting flaps 252, 217 of the front and back sections 211, 212 each extends one half the extent of an end section 215 with its folding flap 250 and the cover section 213 may have a tucking flap 214.
Patent GB-1499987-A (GB)
Title: Hydraulically operated reciprocatory mechanisms
IPC: F01L25/06
Filed: 1975-06-24
Abstract: 1499987 Percussive drill VICTOR PRODUCTS (WALLSEND) Ltd 24 June 1975 [2 July 1974 24 March 1975] 29304/74 and 12229/75 Addition to 1353991 Heading B4C [Also in Division F1] In an hydraulic motor as claimed in the parent Specification, wherein a double-acting piston 1 is controlled by a changeover valve 10, reversal of the valve 10 being effected by the alternate supply of hydraulic pressure to annular pilot piston end chambers 19A, 19B via ports 7A, 7B uncovered by the piston 1, the end chambers 19A, 19B are connected to exhaust 14A, 14B through variable restrictions 55A, 55B each of which decreases in effect as its associated end chamber expands. Once the valve 10 has changed over, a space 26A or 26B containing a respective fixed piston 51A, 51B, becomes pressurized through a port 52A or 52B thereby to hold the valve in its new position. As soon as the piston 1 re-covers the port 7A or 7B, the associated end chamber can exhaust completely. The restrictions 55A, 55B are defined by the space between a tapered surface of the pilot piston 12A or 12B and a cylindrical surface of the valve housing 20 or vice versa. Alternatively the co-operating surfaces of the pilot pistons and the housing may be slotted or grooved.
Patent GB-1425915-A (GB)
Title: Rolling mills
IPC: B21C23/00
Filed: 1972-06-22
Abstract: 1425915 Rolling mills BRITISH STEEL CORP 22 June 1973 [22 June 1972] 29355/72 Heading B3M A balancing unit 8 for urging a pair of work rolls 2, 4 apart is pivotally mounted independently of the chocks 10, 12 of those rolls, and bears against abutment surfaces 18 on the chocks. The unit is shown suuported on a rod 22 extending into backing roll chocks 32, 34, but the unit can alternatively be mounted on the mill frame.  The unit includes an hydraulically operated piston 16 slidable within a casing 14 fixed to the rod 22. Springs 26, 28 tend to centre the unit. To facilitate roll changing, the casing 14 is pivotable clear of the work roll chocks.
Patent GB-1269367-A (GB)
Title: Hydraulic actuator piston and cylinder device
IPC: F16J10/02
Filed: 1969-06-10
Abstract: 1,269,367. Hydraulic actuators. INTEGRATED DYNAMICS Inc. June 10, 1969 [June 10, 1968; April 16, 1969], No.29364/69. Heading F1P. A single-acting hydraulic piston 24 of less diameter than the cylinder 12 slides within a bearing 20 secured to one end of the cylinder and is normally prevented from being withdrawn from the cylinder by abutment of a releasable stop collar 40 on the piston end 38 against a shoulder 36 at the junction of the bearing 20 and cylinder 12; the collar being held by a pin 44 loose in a transverse bore 46 in the piston end 38 and capable of being withdrawn through the hydraulic inlet and outlet port 32 in the cylinder wall. The pin is flattened where it abuts the collar 40 and the piston 24.
Patent GB-219860-A (GB)
Title: Improvements in and relating to bale wire strapping tools
IPC: B65B13/02
Filed: 1923-11-22
Abstract: 219,860. Power, G. P. Nov. 22, 1923. Wire strainers.-In a lever-tool for securing looped wire straps or ties on bales, boxes, packing cases &c. of the type described in Specification 182,806, in which means are provided for engaging the loop, for gripping and tensioning the free end of the wire after passing through the loop and through a slot in a rotary twisting member, and for cutting off the free end of the wire, and in which the body is rocked over after tensioning and prior to twisting so that the wire round the bale adjacent the loop also enters the slot in the twisting member, the axis of the twisting member h is set at an obtuse angle to the axis of the gear wheel j which drives it, so that the cutter l carried by the wheel is carried clear of the wire. passing round the bale. The body a of the tool has a pair of lateral lugs b resting in the bale and an intermediate hook for engaging the loop and carries a tensioning lever e with gravityactuated gripper f. During tensioning the tool is supported on the bale by lugs b and also by a rest consisting of an aluminium casting having a broad base o and two lugs p secured to the twisting handle k. Lugs r at each side of the body support the tool during twisting.
Patent GB-751463-A (GB)
Title: Improvements in and relating to hospital beds and mattresses
IPC: A61G7/02
Filed: 1954-10-13
Abstract: 751,463. Invalid's bedsteads. CHURCH, L. J. Oct. 13, 1954 [Oct. 13, 1953 ; Oct. 23, 1953 ; July 8, 1954], No. 29481/54. Class 52(2). An invalid's bedstead is provided with a mattress frame 6 in an aperture 11 in which can slide a wheeled tray 14 for carrying a bed-pan or air-ring, the overlay 1 being provided with an opening 3 coinciding with the aperture 11 and occluded by removable overlay sections 4, 5, 19 so that, by removing one or more of the sections, and sliding the tray, the bed-pan &c. can be located in the desired position. A back rest 17 is pivoted to the head end of the tray and a pivoted stop bar 29 can be used to hold the tray towards the head end. The tray can be used after removal of appropriate overlay sections to transport towards the head end of the bed an invalid who has slipped down the bed. Frame 6 may be superposed on or constitute the main mattress frame of the bed and may be raised towards the foot end. Side frames 21 are pivoted to the frame 6 and are held in extended position by pull-out rods 22 so that, during bed-making, an invalid can be rolled on to them.
Patent GB-331770-A (GB)
Title: Improvements in and relating to woven wire net making machines
IPC: B21F27/06
Filed: 1929-09-30
Abstract: 331,770. Haidekker Sßndor RÚszvÚnytßrsasßg. Oct. 1, 1928, [Convention date]. Leno and like motions. - In a machine of the type described in Specification 13668/03 for making woven wire fabrics consisting of stay wires and pairs of warps twisted together, the twist limiting edges are formed on members which are connected to the rotary shed forming twisting jaws, through which the warps are fed, so as to be stationary in the longitudinal direction and so constructed as to clear the space for introduction of the stays between the edges and the jaws. A smaller twisting member and hence a closer mesh is thus obtained. The twisting jaws 6 which may be in one piece or in detachable sections 8. 9 and are mounted on hollow shafts 1 rotated by helical gears 4, 4<1> arranged in staggered fashion to mesh with gears on shafts 40, are provided with grooved rollers 10, 11 to guide the warp wires 26, which are drawn through the hollow shafts. The rollers may be mounted on fixed axles or may be integral therewith. The twist limiting edges 24, which may be straight or curved in the horizontal or vertical planes, are formed on members secured to the twisters. In one form the members may consist of pairs of spring blades 23 secured by lateral extensions 30 to the twisters, or may each consist of a spring blade formed on a disc 32 secured by screws 33 to the jaw, or a pivoted blade. The straight or corrugated warp wire after insertion in the shed may thus be drawn by forked bars through the members into the corner of the shed. If a wire of diameter less than the space between the edges is used, the limiting edges may be formed on rigid members. The warp wires are guided by wedge-shaped spacing blocks 16 and during the twisting operation the edges 24 are pressed together by the wires lying on the blades and thus limit the twisting. In order that the twisting of the wires between the rear end of the hollow shaft and the tensioning cylinder may not interfere with the feed of the warps, a twisting or shed forming head 7, similar to the head 6 is mounted at the rear end of the shaft so that, at the, termination of twisting, the corner of the rear shed will still be such a distance from the rollers 11<1> as to allow 'feed of the warps. A dividing plate 19 is inserted in grooves 41 in the shaft of such width that it may yield to allow the passage of the wire if knotted.
Patent GB-211915-A (GB)
Title: Improvements in machine for packaging articles
IPC: B65B19/22
Filed: 1922-10-30
Abstract: 211,915. Thornton, A. A., (Comas Cigarette Machine Co.). Oct. 30, 1922. Coating-machines.-In machines for wrapping- up charges of cigarettes or other articles, after folding discs 193, Fig. 7, have made the top longitudinal folds, pasting rollers 194 paste the lower longitudinal projections of the wrapper. The paste is supplied from a receptacle 200, Fig 7, by rolls 198, 196, and the whole device is mounted to rock about a pivot 206 so that the action of a horizontal cam 212 on an arm 208 lifts the rollers 194 out of contact with the packets at intervals. A vertical plunger 216, Figs. 7 and 25, forces the packet vertically downwards, folding up the outstanding longitudinal edges, and tuckers 220 fold down the ends of the open end of the packet. A transverse plunger 222 moves the packet along a channel 322 and a disc 232 wipes down the upper side of the open end of the packet into the position shown in Fig. 28. A pasting roll 236 applies adhesive to the outstanding flap and a vertical plunger 230 depresses the packet on to a table, turning up the last flap. An ejector 260 thrusts the packet beween bands 262, 263, a spring-held piece 264 holding the last flap in engagement to ensure adhesion during the retraction of the ejector.
Patent GB-1423447-A (GB)
Title: Process for fixing holographic patterns in electro-optic  crystals and the crystals produced thereby
IPC: G02F1/05
Filed: 1973-06-22
Abstract: 1423447 Electric charge pattern holograms RCA CORPORATION 22 June 1973 29664/73 Heading H3B A hologram in the form of an electric field pattern is formed in an electro-optic crystal by object and reference beams releasing electrons or holes from deep traps, the hologram so formed being stabilized by restricted time and temperature heating, or by irradiation with gamma rays, so as to produce an ionic charge pattern corresponding to the original electric field pattern. Both object and reference beams are linearly polarized in the same plane, Fig. 1 (riot shown), which coincides in direction to the c axis of the electro-optic crystal. Suggested stabilizing temperatures are between 80‹ and 180‹ C. with a time limit of 0À1 sec. at the maximum temperature. Hologram erasure is obtained by heating for a longer time or at a higher temperature, or by exposure to gamma radiation. Several hologram patterns may be stored in the same electro-optic crystal which may be undoped LiNbO 3 , LiNbO 3  doped with 0À001% iron, or Ba 2 Na.Nb 5 O 15  doped with 0À002% molybdenum and 0À036% iron, the percentages being by weight.
Patent GB-249592-A (GB)
Title: Improvements in or relating to means for raising liquids
IPC: F04F5/08
Filed: 1924-12-10
Abstract: 249,592. Boving, J. O., (West & Co.). Dec. 10, 1924. Direct air pressure apparatus, automatic; aircompressing devices, applications of; raising by stages; valves for pressure fluid, actuation and urrangement of.-In liquid-raising apparatus of the kind in which air is entrained by water falling from a, level 1 to a level 2 and is released in a chamber 4, two series of elevating tanks are arranged so that the tank 22 fills by gravity while air from the chamber 4 forces liquid from the tank 21 to the tank 25 and the air connections to the tanks are such that when the tanks 21, 26, 29 are connected to the chamber 4, the tanks 22, 25, 31 are connected to the air exhaust pipe 19 which is preferably led to the induction pipe 3. The air valve 18 may be automatically actuated as shown in Fig. 4 in which the piston valve 45 connects tank 21 to the compressed air pipe 17 and tank 22 to the exhaust pipe 19x. When the float valve 52 opens, air passes through the pipe 47 and moves the valve 45 to the other end of the cylinder, reversing the connections. The air pipes 6 projecting above the head-race level are supported in a member 7 which may be adjusted vertically to act as a valve controlling the flow into the induction pipe at the end of which is a baffle 10 to assist the trapping of air in the chamber 4. The chamber 4 may be closed, the induction pipe passing in at the bottom and a return pipe to the tail-race being provided. The induction and return pipes may be connected tangentially to a cylindrical chamber.
Patent GB-298909-A (GB)
Title: Improvements in or relating to the washing of bottles or other vessels
IPC: B08B9/34
Filed: 1928-10-15
Abstract: 298,909. Freihoefer, F. Oct. 14, 1927, [Convention date]. Void [Published under Sect. 91 of the Acts]. Bottles, washing. - Apparatus for cleansing bottles and other vessels comprises a framework 6 supporting a rotatably-mounted hollow shaft 1, which is connected to, and communicates by a joint 4 with a chamber 3 provided with perforated spray pipes 12, 13. The shaft 1 is adapted to be connected to feed pipes 3<1> - - 3<111>, for supplying hot or cold water, cleansing solution, or compressed air to the spray pipes 12, 13. The bottles or other vessels are placed over the tubes 13 and are cleansed internally by liquid and compressed air passing through these tubes, the tubes 12 being provided for treatment of the exterior of the vessels. An adjustable cover 18 serves to hold the vessels on the spray pipes. The shaft 1 is adapted to be turned manually, through the medium of worm gearing, cleansing solution and compressed air being admitted to the vessels when the apparatus occupies the position indicated in dotted lines.
Patent GB-324040-A (GB)
Title: Improvements relating to the electrical transmission or reproduction of sound
IPC: H04R21/02
Filed: 1928-10-15
Abstract: 324,040. Snell, A. E. C., and Clifford, F. S. Oct. 15, 1928. Microphones; diaphragms. - A differential microphone has the central electrode 1, Fig. 1, connected to a resilient diaphragm 3 which is flat and concentrically corrugated. The granule chambers 4, formed by the outer electrodes 5, 6 and packing material 9, 10 are preferably annular and may be replenished through the opening 11. The packing 9 exerts a peripheral damping effect on the electrode 1, which may have radial ribs 1<x>, Fig. 2, to prevent the granules packing; the outer electrodes mav also be ribbed. The annular granule chambers may be partitioned or divided into a group of independent chambers.
Patent GB-1269403-A (GB)
Title: Improvements in brush holding arrangements in dynamoelectric machines
IPC: H01R39/38
Filed: 1969-06-12
Abstract: 1,269,403. Brush holders for dynamo-electric machines. GENERAL ELECTRIC CO. 12 June, 1969 [21 June, 1968], No. 29814/69. Heading H2A. A brush assembly in a dynamo-electric machine comprises a prestressed volute spring 24 secured to a rigid backing member 26 which is pivotally mounted (36) on the brush holder so that the spring both urges the brush 16 towards the current-collecting surface 18 and at the same time biases a portion 42 of the backing member against the brush to hold the brush against a surface 44 of the brush holder. The spring preferably engages a sloping surface 30 of the brush so that the brush is held against surface 44 at both its upper and lower ends. The backing member 26 has a handle 48 to facilitate the disengaging of member 26 from pivot 36 when the brush is to be changed, complete removal of the member being prevented by pin 50. The surface of the portion 42 of the backing member may have a friction-free coating. The brush assembly may be used with reversible machines and may be mounted obliquely relative to the currentcollecting surface 18.