baber/WOPTO huggingface dataset:
Patent GB-1383209-A (GB)
Title: Machine for slabbing logs
IPC: B27B33/20
Filed: 1971-08-14
Abstract: 1383209 Log slabbing machine HAWKER SIDDELEY CANADA Ltd 27 March 1972 [14 Aug 1971] 38232/71 Heading B5L A log slabbing machine, Fig. 1, comprises means for feeding a log 11 lengthwise through the machine, and a head member 16 or 17, rotatable about an axis 18.1 perpendicular to the direction of log feed. A circular saw or cutter is mounted on the inner face 23, Fig. 3, of the head member and has teeth 25 projecting outward of the periphery of the head member for cutting a slab from the log as the log is fed through the machine. Chipping knives 31 are also provided on the head member for progressively reducing the slab to chips as it is being cut from the log by the saw or cutter, the chipping knives being disposed so as to provide a chipped end face on the slab. In one embodiment, the log is fed by a roller 21, Fig. 1, and the saw comprises segments 24.1, 24.2, 24.3, Fig. 3, screwed to the end face of the member 16 in such a way that the centre, e.g. 43, of each segment is offset relative to the axis 18.1. This equalizes the extra load on the saw teeth due to the omission of teeth where the chipping knives are located. Each segment has a thicker radially inner portion and a thinner outer portion in which the teeth 25 are formed with gullets between them. Each knife 31 is trapezoidal and its cutting edge is arranged to extend into the kerf cut by the saw. In another embodiment, the saw segments 24.1, 24.2, 24.3, Fig. 3, are replaced by segments 64, 65, 66, Fig. 7, each carrying chipping teeth 68.
Patent GB-972711-A (GB)
Title: Improvements in or relating to girders
IPC: E04B7/12
Filed: 1960-11-08
Abstract: 972,711. Roofing members; roof structures. INVESTMENT TRUST. Nov. 8, 1960 [Nov. 10, 1959; Feb. 8, 1960], No. 38292/60. Heading E1V. A girder adapted to form north light roofing comprises an L-sectioned main body portion 1 and a substantially plane member 2 extending from the end of one of the arms 1a of the body 1 to midway between the ends of the other arm 1b so as to define a hollow triangular space 1c extending along the length of the girder. Hook shaped clips 4 and grooves 8, Fig. 2, for supporting glass panes 6 are provided at or near the ends of the arms 1a, 1b. Elastic sealing means 7 surrounds the edge of the glass within the groove 8. The space within the girder may be filled with sound, heat or fire insulating means and insulating means 9 may be provided on the outer surface.
Patent GB-856565-A (GB)
Title: Process for the preparation of polypropylene
IPC: C08F10/00
Filed: 1957-12-10
Abstract: Propylene is polymerized using a catalyst obtained by dispersing in a hydrocarbon a halide of a Group IVa, Va or VIa metal, the metal being in a valence state lower than its maximum, and an alkali metal hydride, followed by heating, cooling and adding aluminium trichloride.  Ethylene and/or propylene may be added to the catalyst before elevating to polymerization temperature, in order to effect control of molecular weight. Specified hydrides are LiH, NaH, KH, LiAlH4, NaBH4, and KBH4.  In the example isopropanol, nitric acid, methanol and pentane are used in the purification of the polymer.ALSO:A catalyst for polymerizing propylene is obtained by dispersing in a hydrocarbon a halide of a Group IVa, Va or VIa metal, the metal being in a valence state lower than its maximum, and an alkali metal hydride, followed by heating at 100-180 DEG C., cooling to below 90 DEG C. and adding aluminium trichloride.  Preferred catalyst components are the halides of Ti, Zr, Hf, V, Nb, Cr, Mo and W, e.g. TiCl3, and LiH, NaH, KH, LiAlH4, NaBH4 and KBH4.
Patent GB-1305336-A (GB)
IPC: F28F21/06
Filed: 1971-08-16
Abstract: 1305336 Extruding PTFE tubes E I DU PONT DE NEMOURS & CO 16 Aug 1971 [17  Aug 1970] 38331/71 Heading B5A [Also in Division F4]  A process for producing small diameter heat exchange tubes by extrusion comprises (a) dry mixing pellets of a polyfluorinated plastic and particles of graphite having a diameter >2 microns to form a mixture comprising 5 to 45% by wt. of graphite particles (b) passing the dry mixture into a high energy, low temperature mechanical mixing region for mechanical milling (c) forcing the mixture into a melting region where the bulk temperature of the mixture is maintained at a temperature <50 F. above the melt point of the plastic and (d) extruding the melt mixture into hollow tubes in which the ratio of the diameter of the graphite particles to the wall thickness of the tubes is between 0À001 and 0À5. Preferably the polyfluorinated plastic consists of a polymer of tetrafluoroethylene or a copolymer of tetrafluoroethylene and hexafluoropropylene. The mechanical mixing region is formed between two co-rotating screws having varying cross-sections which divide the mechanical mixing region into a plurality of mixing zones to impart varying degrees of energy to the mixing process.
Patent GB-989339-A (GB)
Title: Improvements relating to comparison circuit arrangements
Inventor: WARMAN BLOOMFIELD JAMES
IPC: H04Q3/00
Filed: 1960-07-18
Abstract: 989,339. Determining which of a number of quantities is the greatest. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. July 3, 1961 [July 18, 1960], No. 38389/62. Divided out of 989,336. Heading G1U. [Also in Division H4] In an arrangement for determining which of a number of quantities is the greatest, the quantities are represented by voltages on respective leads cA. . .cD and each lead is connected via an associated current responsive device T#a... T#d to each of the other leads via rectifiers so poled that no current flows through the current responsive device (or devices) corresponding to the quantity (or quantities) which is the greatest. The arrangement is used to determine which of the groups Ab... Db of telephone lines has the greatest number of free lines. Thus transistors Trb 1. . . N are caused to conduct if the corresponding line in the group is free, to cause a rise in potential of leads cA.... cD proportional to the number of free lines in the corresponding group. If, say, the potential of cA is highest, current flows through the primary windings of all transformers T#B. . .T#D, but not through T#A. When a control signal is subsequently applied to lead Sc16 the currents in transformers T#B... T#D cease thereby producing an output pulse to change over the states of all the bi-stable circuits SAe... SDe. This results in negative potential being emitted on AF and earth potential on AB indicating that group Ab has the greatest number of free lines the corresponding terminals for the other groups having these potentials reversed.
Patent GB-1069699-A (GB)
Title: Scan system for optical character readers
IPC: G06V10/20
Filed: 1964-09-21
Abstract: 1,069,699. Automatic character reading. RADIO CORPORATION OF AMERICA. Sept. 21, 1964 [Oct. 11, 1963], No. 38391/64. Heading G4R. [Also in Division H4] In a character reading apparatus of the kind in which characters are scanned in a raster of scan lines to produce video signals representing the character, the scanner, due to lag, causes residues of one scan to appear in the next and these are removed by delaying each scan in turn and subtracting from the signals in each scan a fraction of the signals from the preceding scan. The moving character (12, Fig. 1, not shown) is imaged on to the screen of a vidicon tube (18) and scanned in a vertical raster by an electron beam two and a half times the height of a character to compensate for misregistry. The scan consists in a vertical stroke always in the same place on the screen, the image moving to produce a series of spaced scans. Since the screen is not discharged entirely by the light falling on it nor recharged entirely by the darkness between scans and because the material of the screen does not respond instantly there is, in the output from each scan, a residue of the previous scan. This is removed by delaying the video signal at (62) and subtracting a selected proportion in difference amplifier (66). A clipping level is derived from the character signals by removing the blanking pulses in gate (82) and applying the character signals to peak detector (84), the peak value being stored in capacitor (86). At the end of scan the peak value is applied by transfer gate (90) to difference amplifier where it is compared with a reference voltage which is the " pure black " blanking pulse signal obtained by clamp (58). The output is applied to a clamp which causes the signals to be quantized in trigger (100) at a fixed proportion of their peak value. The binary output is applied to gate (103) which is controlled to remove the blanking pulses. The " pure black" blanking pulse signal is clamped (at 102) and used to control the automatic gain control of the vidicon.
Patent GB-1000744-A (GB)
Title: Improvements in or relating to hydraulic accumulators
Inventor: BAINES FREDERICK
IPC: F15B1/10
Filed: 1960-11-10
Abstract: 1,000,744. Hydraulic accumulators. PLESSEY CO. Ltd. Nov. 9, 1961 [Nov. 10, 1960], No. 38584/60. Heading F1P. An hydraulic accumulator comprises a movable metal partition 6, Fig. 1A, connected to one end of a cylindrical bellows 4, the other end of which is secured to the wall 1 of the accumulator. The ends of the accumulator are closed by end caps 2, 3 sealed to the wall 1 by welding, brazing, resin bonding or other means, end cap 2 having an inlet 2a for connection to a source of air pressure and having a cock and relief valve 2b, and end cap 3 having an inlet 3a for connection to a source of hydraulic fluid and a bleed port 3b by means of which air can be exhausted from the hydraulic side of the partition. The partition has a stepped cup-shape with one end secured by welding 4a to the bellows, the other end of which is secured by welding 4b to a projection 3d on the end cap 3. A perforated guide tube 5 is secured to the end cap 3 and extends approximately half the length of the accumulator. Rings 7 of metal or synthetic resin may be introduced between the convolutions of the bellows during or after production thereof to prevent deformation of the bellows and are provided with notches which, with the perforations in the tube 5, permit hydraulic fluid to pass to the space between the bellows and the wall of the partition.
Patent GB-1172339-A (GB)
Title: Method of making Centrifugal Casting Mould
Inventor: WILLINGHAM HAROLD EDMUND
IPC: B22D13/10
Filed: 1968-08-13
Abstract: 1,172,339. Casting composite centrifugal moulds; centrifugal casting. H. E. WILLING- HAM. 13 Aug., 1968 [20 Sept., 1967], No. 38718/68. Headings B3A and B3F. A method of making a centrifugal mould comprises providing a mandrel having substantially the same configuration as a cylindrical body to be cast, coating the mandrel with a  metal having a relatively low melting-point, electrodepositing a substantial thickness of a low stress material to form a first layer 15, placing the coated mandrel within a mould 16, introducing a molten metal having high heat conduction and radiation qualities to form a second layer 18, removing the assembly from the mould 16 and removing the mandrel from the cast mould. The mandrel is initially coated with a layer of tin or lead, which is roughened before the first layer 15 is applied. This layer may be of nickel and is also rough surfaced and during the electro-deposition, growths or nodules will be formed which will extend the outer surface of the electroform, Fig. 3 (not shown). The second layer is of aluminium and (when the cast mould is removed from the mould 16) is machined to size. Wear-resistant bands 19 are fitted to the cast mould exterior to engage drive wheels 20. The completed mould is heated to melt the initial coating to allow removal of the mandrel, which may be used to make another mould. When the mould is used for casting, Fig. 6, a steel flange 27 is mounted at one end. At the opposite end an expendable shell core 28 of moulded resin sand is provided, or a permanent metal shell core may be substituted therefor. The bore of the mould may be blasted with an abrasive and a metal such as chromium deposited thereon. When all the necessary appendages are in position on the mould it is dynamically balanced. It is heated before use but may have cooling fins or be cooled by a flow of air or liquid against it as it rotates during casting.
Patent GB-1161631-A (GB)
Title: Improvements in or relating to Form Feeding Devices
IPC: B41L1/00
Filed: 1966-08-31
Abstract: 1,161,631. Selective printing. LAMSON PARAGON Ltd. 31 Aug., 1966 [1 Sept., 1965], No. 38857/66. Heading B6F. A feeding device for continuous stationery formed by separately supported stacks of zig-zag folded record webs 5 to 8 (Fig. 1), and transfer webs 9 to 12 supported on rolls 37 in a container 3, Fig. 2, comprises a trolley 1 mounting slidably a table 13a having upstanding aligning walls 14a, 14b to receive the container 3 and move it laterally for engagement with driving or braking pins 36 by means of a spindle 26 which actuates a nut 27 depending from the table 13a. The trolley is moved towards a printing unit 16 (Fig. 1), with which it is interlocked in the operative position, by rollers 31, 32, Fig. 3, riding up respective inclines 18a, fast with the base of the printing unit, to enter arcuate recesses 19a in guides 34 which are integral with the inclines 18a. The inclines 18a are received between respective pairs of guide rollers 33, which jointly with the rollers 32 are mounted at respective ends of a guide rail 24 integral with the trolley 1. The guide rail 24 is also engaged on opposite sides by spaced pairs of rollers 21, 22, which depend from the table 13a. The rolls 37 are driven by their respective pins 36 through friction clutches 45, Fig. 2, and worm-wheels 40 driven in turn by worms 41 (Fig. 4), which are mounted on a common-shaft 42.
Patent GB-1520457-A (GB)
Title: Method and apparatus for supplying a quantity of liquid containing an inclusion of a fluid an for measuring liquid flow
IPC: G01F1/704
Filed: 1975-09-22
Abstract: 1520457 Liquid metering apparatus CONTRAVES AG 22 Sept 1975 [23 Sept 1974] 38865/75 Heading B8N An apparatus for supplying a liquid which includes an immiscible fluid inclusion which can be detected during flow of the liquid for metering purposes, flow rate determination, viscosity measurement or counting of particles, e.g. blood corpuscles in the liquid, comprises a junction duct 12 in the flow path 11, 10 of the liquid and a fluid supply to the duct 12 controlled by a valve 19. The liquid is moved along its flow path 11, 10 when a valve 6 is opened by a pump situated upstream, Fig. 6 (not shown), or downstream of the junction duct 12. The inclusion is detected by photo-electric detectors 4, 5 which operate in response to a change in the refractive index of the fluid flowing past them. The detectors operate in conjunction with atimer to determine the flow rate of the volume between the detectors or a counter to measure the number of particles in the volume. The immiscible fluid may be air, nitrogen to form a gas bubble or an immiscible liquid, e.g. water, if the main liquid is benzene hydrocarbon or chloroform. The pump may incorporate a valve or be fluid tight to effect its own sealing. A pressure sensor either in the liquid separator (53) gas space (54), Fig. 5 (not shown), or in a pressure gas chamber (17), Fig. 6 (not shown) may control the pump.
Patent GB-1077621-A (GB)
Title: Rotary coin holder mechanisms
Inventor: CHARLES JOHN ARTHUR
IPC: G07F15/02
Filed: 1962-10-15
Abstract: 1,077,621. Prepayment meters. UNITED GAS INDUSTRIES Ltd. Jan. 14, 1964 [Oct. 15, 1962], No. 38899/62. Heading G4V. A prepayment meter has a driving arrangement whereby the coin pocket carriage plate is driven in credit-registering direction through a one-way device and is restored by engagement with a member that is decoupled so long as a coin remains in the pocket. As shown in Fig. 1, a coin-injector plate 3, driven by a handle mounted on a price change plate 1, drives the coin pocket carriage plate 2 one way by striking an abutment 7 on a spring-biased ratchet tooth 5, and drives the carriage in reverse by striking a finger 12 mounted on the coin pocket. When the pocket contains a coin the finger 12 is retracted. As shown in Fig. 2, where a coin pocket 13, 14, has a slide 16 deflected by an inserted coin 17, the slide has a projection 21 which when not put out of position by an inserted coin enables drive from a shaft 18 and lever 19, 20, to rotate the carriage plate of the coin pocket.
Patent GB-1271510-A (GB)
Title: Polymeric compositions
Inventor: FOSTER FRANK LEACH
IPC: C08K5/138
Filed: 1968-08-14
Abstract: 1,271,510. Polyamide/biocide compositions. IMPERIAL CHEMICAL INDUSTRIES Ltd. 28 July, 1969 [14 Aug., 1968], No. 38928/68. Heading A5E. [Also in Division C3] Polyamide compositions, e.g. nylon 6 or 66, are rendered bactericidal by incorporation of a metal trichlorophenate e.g. 0.1 to 10% of the Li, Na, K, Ca, Ba, Mg, Zn, Pb, Cu, Cd or Al salt of 2, 4, 6- or 2, 4, 5-trichlorophenol. The composition may also include pigments, fillers, mould releasers, antioxidants, heat stabilisers, viscosity stabilisers or delustrants and may be formed into textile materials for clothing or surgical dressings or bristles for tooth brushes.
Patent GB-1274458-A (GB)
Title: Method of threading in threads in draw-twisting or draw-winding machines
IPC: D02J1/22
Filed: 1969-08-05
Abstract: 1,274,458. Drawing threads. MASCHINENFABRIK RIETER A.G. 5 Aug., 1969 [8 Aug., 1968], No. 39064/69. Heading DID. The drawing ratio imparted to a thread as it passes through a drawing zone is reduced during the time in which a rejoined thread connection passes through the drawing zone. The thread connection is made upon severing the end of an almost exhausted package feeding a draw-twisting or draw-winding- machine, and joining it to the free end of a new full package. As shown, the drawing ratio between feed rolls 33 and draw rolls 30 is reduced by operating electric disc-clutch 36 so that the gear 34 is connected to drive the feed rolls 33 and rotate them at a faster rate than they are rotated by gear 35. In alternative embodiments; (a) the pressure rolls of the feed mechanism are lifted from the counter roll to reduce the draw ratio to zero, Fig. 4 not shown; (b) the thread passing around the draw rolls is moved onto a low friction part so that the yarn slips thereon, Fig. 5 not shown; (c) the thread connection includes a slip knot which slips in the drawing zone, Fig. 6 not shown; (d) the drive to the feed rolls is disconnected by an electrically operated slip clutch so that the feed rolls are rotated by the thread, Fig. 7 not shown; (e) an electrically operated slip clutch is used to increase the speed of the feed rollers of the second stage of a two stage drawing process, the drawing ratio of the first stage remaining constant, Fig. 8 not shown; (f) in an arrangement similar to that of Fig. 5 also comprising a relaxation zone, the thread is additionally moved onto a low friction part of the relaxation roller, Fig. 9 not shown.
Patent GB-1039927-A (GB)
Title: Dyestuff
IPC: C09B69/02
Filed: 1963-10-04
Abstract: The invention comprises a process in which any basic dye is treated in aqueous solution with a stilbene or imidazole sulphonic acid or carboxylic acid salt yielding an almost insoluble precipitate of a dye suitable for use in inks of ball-point pens. The basic dye is brought into aqueous solution using inorganic or organic acids and this solution is mixed with an aqueous solution of a fluorescent stilbene or imidazole sulphamic or carboxylic acid in aqueous hydroxide, or amine solution.  Equivalent amounts of the basic dye and stilbene or imidazole compound are used. The stilbene or imidazole compounds have the general formula <FORM:1039927/C4-C5/1> in which A is -CH = CH- or a ring of formula <FORM:1039927/C4-C5/2> X1 is selected from sulphonic or carboxylic acid groups or a salt thereof, X2 is hydrogen or sulphonic acid or a salt thereof, Y is a hydrogen atom or an amino or -NH-CO-NH2 or a group having the formula <FORM:1039927/C4-C5/3> <FORM:1039927/C4-C5/4> in which R1 is an amino or aliphatically substituted amino group and R2 is an amino group aliphatically or aromatically substituted, preferably a sulphonated aromatic group.  The basic dyes used include those of phthalocyanine, xanthene, triphenylmethane and methine dyes.
Patent GB-1269933-A (GB)
Title: Improvements in or relating to decorative structures
Inventor: COBB MALCOLM CARNIE
IPC: D06P1/52
Filed: 1968-04-08
Abstract: 1,269,933. Decorative structures. IMPERIAL CHEMICAL INDUSTRIES Ltd. 31 March, 1969 [8 April, 1968; 16 Aug., 1968], Nos. 16855/68 and 39269/68. Heading B2E. [Also in Division D1] A decorative structure comprises a substrate to which is affixed a multiplicity of dyed fused polymer particles and agglomerates thereof. The structure may be obtained by applying polymer particles to a substrate material, heating to give a multiplicity of discrete fused polymer particles and agglomerates thereof and subsequently dyeing the particles. Alternatively, the particles may be pre-dyed before application. Both the substrate and polymer particles may be dyed. Preferably the particles and agglomerates are at the surface of the substrate. The particles may be applied using a stencil to form a pattern, and electrostatic means of a vibrating sieve may be employed. The polymer particles may be of natural and regenerated or saponified cellulose, natural and regenerated proteins, polyacrylics, polyamides, polyhydrocarbons, polyesters, polyethers, polyurethanes and polyvinyls. The substrate, which may also be of these materials, may be in the form of filaments, films, knitted, woven, or non-woven fibrous or fibrillated film assemblies, foils, sheets, webs or mouldings.
Patent GB-811402-A (GB)
Title: Improvements relating to the upholstering of the bodies of perambulators
Inventor: LINES WALTER MORAY
IPC: A47D9/00
Filed: 1956-12-27
Abstract: 811,402. Attaching upholstery to perambulators. LINE BROS. Ltd. Dec. 5, 1957 [Dec 27, 1956], No. 39330/56. Class 52(4) An upholstered lining for a perambulator body 14 consists of a bottom panel 1 and side panels 2 each formed along its upper edge with a pocket containing a rigid stiffening member 12, the pocket being secured to the body as by press-studs 19 taking through members 12 and top flangers 20 of the body. As shown panels 2 consist of padding 9 and stiffening members 10 confined between inner and outer sheets of polyvinyl chloride seam welded around their edges and to form the edge pockets. The bottom panel may be similarly formed but as shown it consists of a rigid sheet secured by tacks 13 to the lower edges of panels 2 which have lower pockets containing stiffening members 11. Bottom 1 is secured by screws 17 to cross members 15, 16 of the body.
Patent GB-1464173-A (GB)
Title: Composite lumber products
IPC: B27B1/00
Filed: 1974-01-14
Abstract: 1464173 Forms of wood WEYERHAEUSER CO 14 Jan 1974 [20 Feb 1973] 39352/76 Divided out of 1464171 Heading B5L The disclosure is identical with that in the parent Specification 1464171, but the claims relate to a lumber product comprising at least two sector pairs bonded together edgewise into a generally planar shape, each of the sector pairs defining a parallelogram in cross-section and being comprised of two sector-shaped pieces 60 each having substantially the same included angle between its radial faces, the pieces being cut from generally cylindrical logs, bonded together along their opposed radial faces 52 such that the thin edge of one is approximately adjacent the thick edge of the other, and machined to the cross-sectional shape of a parallelogram. A product formed by cutting the above product along spaced parallel planes, e.g. as indicated in dash-dot lines, is also claimed.