baber/WOPTO huggingface dataset:
Patent GB-1309417-A (GB)
Title: Frequency band-width dividing networks
IPC: H03H9/00
Filed: 1970-08-27
Abstract: 1309417 Filter networks SIEMENS AG 27 Aug 1970 [22 Sept 1969 26 Sept 1969] 41370/70 Heading H3U To facilitate the insertion of active or passive four-terminal devices, e.g. amplifiers, filters or transformers, in a wideband carrier frequency system, without causing attenuation distortion, the wide frequency band is split into two subbands into which the four-terminal devices are connected, the sub-bands being subsequently joined in correct phase and amplitude. As shown, Fig. 2, two identical six terminal networks 1, 2, 3 and 8, 9, 10 are connected in cascade between input terminals 1 and output terminals 10, the two networks being interconnected by active or passive four-terminal devices VP1, VP2. The filter sections 11, 11<SP>1</SP>, 12, 12<SP>1</SP> have linear characteristic functions of the order 2n (n = 1, 2, 3 ...), the sections 11, 111 having the same function # 1  and the sections 12 12<SP>1</SP> having the same function # 2 , where # 2  = 1/Q 1 . It is shown that the filter sections 11, 11<SP>1</SP>, 12, 12<SP>1</SP> permit splitting of the frequency band whilst the entire arrangement functions as an all-pass circuit. The four-terminal devices VP1, VP2 may be identical or different provided that their transmission bands overlap and have similar properties in the cross-over range of the filter networks; also, that in the frequency bands in which the transmission properties of the devices VP1, VP2 are different, the particular filter sections which are blocking, exhibit an attenuation level which is high enough to ensure the required accuracy. Thus, where the properties of device VP1 are to be decisive, the properties of device VP2 must be suppressed by high attenuation given by filter sections 12, 12<SP>1</SP>, and vice versa. These characteristics ensure that the properties of the entire arrangement correspond with the properties of the devices VP1, VP2 with the exception of a supplementary phase shift. According to one embodiment, Fig. 5, the filter sections 11, 11<SP>1</SP> constitute a bandpass arm and the sections 12, 12<SP>1</SP> a band-stop arm, the sections being connected in cascade in mirror-image fashion. The four-terminal devices VP1, VP2 are identical all-pass or low-pass filter cascades and the device VP1 includes band-stop filters formed by crystals Q 1 , Q 2 . The Specification sets out the circuit analysis and synthesis.
Patent GB-1101327-A (GB)
Title: Electric-arc producing apparatus, namely an arc heater or arc furnace
IPC: H05H1/36
Filed: 1965-10-01
Abstract: 1,101,327. Electric arc heating. WESTING- HOUSE ELECTRIC CORPORATION. 1 Oct., 1965 [14 Oct, 1964], No. 41762/65. Heading H5H. An electric arc heater or are furnace comprises a pair of spaced electrodes, a first voltage source for applying a potential between the electrodes, field coil means to establish a magnetic field transverse to the arc and effecting rotational movement of the arc along a substantially circular path and a second voltage source for energizing the field coil means, at least one of the voltage sources being an A.C. source of adjustable frequency to effect reversal of the direction of arc movement of variable periodicity. In a plasma generator comprising water cooled annular electrodes 11, 12 and field coils 13, 14 A.C. of variable, adjustable frequency is applied to the coils by a rectifier-inverter system controlled by a variable frequency oscillator 34. The inverter may comprise four silicon controlled rectifiers 41, 51, 61, 71, either A.C. or D.C. being supplied to the electrodes. Starting methods include moving one of the electrodes, using a movable stator electrode, connecting fuse wire between the electrodes and introducing ionized gas between the electrodes.
Patent GB-1354270-A (GB)
Title: Cyclic olefin polymers
IPC: C08G61/08
Filed: 1973-09-05
Abstract: 1354270 Copolymers of cyclic olefins PHILLIPS PETROLEUM CO 26 July 1971 [27 July 1970] 41794/73 Divided out of 1353387 Heading C3P  Copolymers are obtainedby ring-opening polymerization of a monomer mixture comprising, per 100 parts by weight of total (a) and (b) together, (a) at least 50 parts of a cyclic mono-olefin having 5 or 7-10 C atoms in the ring, (b) 0À001 to 50 parts of an omega-alkenylpolycycloalkene and optionally, (c) 0À01 to 10 parts of a non-tertiary acyclic mono- or polyolefin (including those with cyclic substituent groups). Polymerization is preferably achieved by means of a homogeneous olefin disproportionation catalyst such as molybdenum trichloride dioctanoate and Et 2 AlCl. Numerous examples of each type of monomer are mentioned; polymerization of a mixture of cyclopentene, 5-vinyl-2-norbornene and 1-hexene is described.
Patent GB-1060740-A (GB)
Title: Improvements in evaporating materials for vapour deposition processes
IPC: C23C14/24
Filed: 1965-10-04
Abstract: To prevent corrosion of the evaporator boat in the vapour deposition of e.g. silicates or nickel, a powder of the same material as that of the boat, e.g. tungsten, is added to the material to be evaporated.
Patent GB-1015980-A (GB)
Title: Improvements in or relating to elastic packing plugs made of foam material
IPC: F16C11/06
Filed: 1964-10-14
Abstract: 1,015,980. Ball joints. J. ULDERUP. Oct. 14, 1964 [Oct. 16, 1963], No. 41937/64. Heading E2F [Also in Division F2] A ball joint has a spherical bearing and a sealing plug 1 (Division F2) of foam material compressed between the housing 2 and the boss 3 of a connecting rod.
Patent GB-1260427-A (GB)
Title: Process for the production of staple fibres
Inventor: DORSCHNER OSKAR
IPC: D04H3/011
Filed: 1969-08-22
Abstract: 1,260,427. Forming and needling webs; stapling fibres. METALLGESELLSCHAFT A.G. 22 Aug., 1969 [24 Aug., 1968; 13 Feb., 1969], No. 42092/69. Headings D1F and D1R. In a continuous process for producing staple fibres of thermoplastic material e.g. a polyamide, polyacrylate, polyester, polyolefin, polyvinyl, polyurethane, extruded and stretched filament bundles are withdrawn and advanced at high speed (up to 4000 ft./minute) by pneumatic ejectors, deposited as a non-homogeneous, entangled filament web or sheet on an underlying, continuous, air-permeable base, partly above a vacuum zone and partly beyond the range thereof, compressed e.g. by passage between rollers, twisted e.g. by a rotating funnel to impart at least five turns per running metre, into a strand which is cut into staple lengths. The web may be orientated and compacted by needling whilst. under tension prior to strand formation. As shown, drawn filament bundles 13 from a spinning apparatus (not shown) are blown by ejectors 12 onto the upper surface of a perforated. endless, receiving band 9, both above and beyond a vacuum zone 17 created by a suction box. The deposited web is pressed between rollers 8 and passes through a twisting funnel 18 by which it is formed into a strand 20 which passes through a water ejector 21 (into which water is fed tangentially at 22) so as to tension and forward it in twisted state to rotating blades 23 for stapling. The mixture of water and fibre is passed through a funnel 24 to a screen band 25 for separating the water. The surface 9 may be provided by an air permeable drum, Fig. 2 (not shown) between which and a top roller the web is pressed and/or the web is advanced by a conveyor band to be needled between a needle plate and an underlying grid, Fig. 3 (not shown) as it passes through pairs of draft rollers.
Patent GB-1534736-A (GB)
Title: Method of modifying fabrics
IPC: D04H1/54
Filed: 1976-10-11
Abstract: 1534736 Bonding and modifying fabrics by transfer printing; spot bonded non-woven fabric IMPERIAL CHEMICAL INDUSTRIES Ltd 23 Sept 1977 [11 Oct 1976] 42120/76 Addition to 1498254 Headings DIB D1P and D1R A method of bonding a fabric, preferably a non-woven fibrous web, comprising distributed meltable thermoplastic material, and of applying to the fabric at least one modifying agent to enhance or impart one or more of the following properties: resistance to the accumulation of static, flame retardancy, pigmentation, dye receptivity, metallic lustre, flocked appearance, electrical conductivity, transmission of heat, and resistance to degradation by light, the method comprising contacting the said fabric with a transfer sheet supporting at least one modifying agent, and subjecting the sheet and fabric to the action of heat and pressure in spaced discrete areas, whereby the thermoplastic material becomes adhesive and thereby bends the fabric, and the modifying agent is simultaneously transferred onto the fabric at least in areas corresponding to the discrete areas. In the examples, polyester bicomponent fibres are treated with a transfer sheet bearing a flame retarding agent or a vacuum deposited chrome metal.
Patent GB-1351710-A (GB)
Title: Rodenticide
IPC: G01H1/00
Filed: 1972-09-11
Abstract: 1351710 Rodenticidal application of thiosemicarbazones NIPPON KAYAKU KK 11 Sept 1972 [13 Sept 1971] 42137/72 Heading A5E [Also in Division C2] Compounds of formula: wherein A is in which R 1  is H or alkyl and R 2  is H, cyano or C 1  to C 3  alkyl, find application in compositions and methods for exterminating rodents. Typical compounds are formaldehyde thiosemicarbazone and methylene bis (1-thiosemicarbazide). Examples of bait compositions are given.
Patent GB-1370356-A (GB)
Title: Machine tool and a method for abrading a workpiece
IPC: B24B1/00
Filed: 1971-09-10
Abstract: 1370356 Abrading ZNIITMACH 10 Sept 1971 42423/71 Headings B3D and B3V A method of machining a surface of a workpiece comprises holding particles by an electromagnetic field so that they bear against the surface and two relative motions, one being a reciprocating motion, are produced between the workpiece and the electromagnetic field such that the particles held in the field abrade the surface along non-parallel interocating abrasion paths. A machine for carrying out the method has a rectangular body 1 divided by a crosswall 2 to form a chamber 3 having a top plate 8. A support 7 is reciprocable along guide ways on the support by a lead screw 16 driven by gearing 36, 38 from a motor. The support carries a U- shaped electromagnetic core 12 having one limb shorter than the other, each limb having an electromagnetic coil 9. Packs 17, 18 are mounted on the coils and carry adjustably mounted tools 13, 26. The drive screw 16 is mounted in bearings 31 in bases 32, 33 secured to the support 8, the bases carrying heads 45, 89 having centres 52, 88 for supporting a workpiece so as to be between the tools 13, 26. The centre 52 is mounted in longitudinal ball bearing in a sleeve rotatable in bearings in the head 45 by a belt drive 64 from a motor 65. The centre is axially reciprocated while rotating by a mechanism 55 driven from a motor 67. To accommodate the reciprocating movement, the centre 88 is mounted on longitudinal ball bearings in the head 89 and is urged towards the centre 52 by a spring. Particles of ferromagnetic powder are held by the electromagnetic field against the workpiece, which may be a ball race mounted on a mandrel between the centres, and abrade the workpiece as it is rotated and reciprocated and as the support 7 is reciprocated along the plate 8 by the lead screw 16. The chamber 3 houses a tank 4 having cooling liquid which is delivered by a pump 105 to a nozzle 107 adjacent the workpiece. In another embodiment for abrading the inner and outer surface of a workpiece, the latter is mounted in a chuck (118, Fig. 9, not shown), which replaces the centre 52, and the centre 88 is replaced by another coil (120) mounted in a head reciprocable along the support 8. A bunker-dosing unit may be provided for supplying the ferromagnetic powder to the workpiece. The machine may be provided with transparent covers 84, 85, cover 85 being slidable over cover 84 to provide access to the working area of the machine. High electrical resistances at the points of contact of the particles with the workpiece causes current to melt the tips of the micro-roughness.
Patent GB-872448-A (GB)
Title: 1-acyl-3 substituted azetidines
Inventor: TESTA EMILIO
Filed: 1958-12-23
Abstract: The invention comprises compounds of the general formulae <FORM:0872448/IV (b)/1> wherein R1 represents hydrogen, a C1-8-alkyl, cycloalkyl, phenyl or phenylalkyl group and R2 and R3 represent C1-8 alkyl, cycloalkyl phenyl or phenylalkyl radicals, and the preparation thereof reacting an azetidine of the general formula <FORM:0872448/IV (b)/2> with an acylating agent of the class consisting of chlorides and anhydrides of a carboxylic acid R.3COOH. if desired in the presence of a tertiary amino base, at between 0 and 120 DEG C. Specification 829,633 also is referred to.
Patent GB-1026039-A (GB)
Title: Improvements in or relating to pulse shaping circuits
IPC: H03K3/33
Filed: 1964-10-19
Abstract: 1,026,039. Transistor and diode pulseshaping circuits. INTERNATIONAL BUSINESS MACHINES CORPORATION. Oct. 19, 1964 [Nov. 4, 1963], No. 42530/64. Heading H3T. In a pulse-shaping circuit having one electrode of each of diodes D 1 , D 2  connected to both the input and output of the circuit, the effect of charge storage within the diodes is used for removal of a lengthy leading edge of an input pulse by diode D 1  and for the addition of waveform to the trailing edge of the input pulse by diode D 2 . As shown with diode D 1  on and diode D 2  off, the leading edge of a positive input pulse causes diode D 1  to turn-off but the stored minority carriers cause a reverse current I 2  which effectively shorts out the input until the diode finally cuts off. As the pulse continues to increase positively, diode D 2  turns on and limits the output to 30V. When the pulse falls below the bias of 30V on diode D 2  the stored minority carriers cause a reverse current to flow for a short duration so causing diode D 2  to add to the input pulse waveform as at 20, Fig. 2a (not shown), before turning off, long leading edge rise times can be improved by increasing the bias voltage on diode D 1  (Fig. 3, not shown), or by using diodes formed by the base and collector electrodes of transistors. Several circuits may be used in cascade to give rise times of 0À5 nanoseconds and negative pulses can be shaped by inverting the diodes and their supplies.
Patent GB-1515884-A (GB)
Title: Conveyor plate for supporting sheets during the manufacture thereof
IPC: B27N3/16
Filed: 1975-10-17
Abstract: 1515884 Support plate for use in multiple opening press DEFIBRATOR AB 17 Oct 1975 [23 Oct 1974] 42726/75 Heading B5A A sheet 14 of wet or dry cellulose, fibrous material or shavings is supported during pressing and heating between platens 10 by a rectangular steel plate 12 having curved longitudinal edges 16, which stiffen the plate and improve drainage from the sheet 14. Transverse metal strips can be welded or riveted to the transverse plate edges (see Fig. 2, not reproduced) and either follow the curves 16 or only the flat portion of plate 12. The curves 16 may be stopped short of the plate transverse edges. The plate 12 is said to be used in a multiple opening press.
Patent GB-1409779-A (GB)
Title: Process for the preparation of catalysts for the dimerization  or codimerization of linear olefins
IPC: B01J29/064
Filed: 1973-09-11
Abstract: 1409779 Dimerisation catalyst SOC ITALIANA RESINE SIR SPA 11 Sept 1973 [20 Sept 1972] 42743/73 Heading B1E [Also in Division C5] Olefin dimerisation catalysts are formed by (i) depositing 0.1-50% wt. of one or more Gp VIII metals on a natural or synthetic zeolite by ion exchange; (ii) contacting with an organic or inorganic base in the liquid or gas form at -35 to 250‹C for at least 30 mins, and (iii) eliminating the excess of base and heat-treating at 50-450‹C for at least 30 mins. Suitably, the zeolite has a surface area of 200-1200 m<SP>2</SP>/g and a pore diameter of 6 to 15A‹ and the group VIII metal is nickel or cobalt. Specified bases are: ammonia, monoethylamine, diethylamine, butylamine, ethylenediamine; pyridine, piperidine, picoline, quinoline and isoquinoline. The zeolite may be suspended in a liquid base, such a base may be allowed to percolate through a bed of the zeolite or a gaseous stream of the base may be passed through a bed of the zeolite. Excess base may be removed by heating. The Examples relate to nickel-on-zeolite 13X catalysts.
Patent GB-943711-A (GB)
Title: Synthetic sponge
IPC: A47L13/16
Filed: 1961-11-30
Abstract: 943,711. Sponges. BRITISH PETROLEUM CO. Ltd., and H. U. MAIER. Oct. 31, 1962 [Nov. 30, 1961; Jan. 15, 1962], Nos. 42826/61 and 1382/62. Heading A4V. A synthetic sponge 11, having interconnecting cells 12, has cavities 13 or 15 formed in at least one face by means of which cleansing fluid flows to the surface to be cleaned although the superficial pores of the sponge are closed by pressure against the surface, grooves 14 on each of two opposite sides of the sponge providing protection, and a grip for the fingers.
Patent GB-1188202-A (GB)
Title: Labeling Unit
Inventor: WEIR STANLEY MCWHORTER
IPC: B65G47/10
Filed: 1967-02-23
Abstract: 1,188,202. Labelling. FMC CORP. 23 Feb., 1967 [25 Feb., 1966], No. 42874/69. Divided out of 1,188,201. Heading B8F. A labelling unit comprises a support structure, means operable to intermittently advance a tape, having indicia-bearing labels removably disposed thereon along a predetermined path relative to the structure, an optical system operable to display an image of the indicia on the labels to the view of a person in the vicinity of the unit, and means operable to remove a label from the tape and apply it on to an article adjacent the predetermined path. The unit is identical with that described in Specification 1,188,201, but the claims differ.
Patent GB-1501712-A (GB)
Title: Heat transfer wall for boiling liquids
IPC: F28F1/12
Filed: 1975-10-20
Abstract: 1501712 Making heat exchangers HITACHI CABLE Ltd and HITACHI Ltd 20 Oct 1975 [21 Oct 1974] 42992/75 Heading B3A [Also in Division F4] A heat transfer metal wall has a surface which, in use, contacts a liquid for transferring heat to the liquid and aiding boiling thereof. The wall comprises tunnels 1 extending parallel to one another. Openings 4 put the interiors of the tunnels in communication with the exterior adjacent the liquid contacting surface. The tunnels are spaced apart from each other by a distance of 0À2 to 1À0 mm., each of the tunnels having a width of 0À1 to 0À8 mm. and a height of 0À2 to 0À8 mm. The openings 4 are regularly spaced from one another longitudinally of the tunnels by not more than 1 mm. and each is of generally triangular shape. The openings may form from 2 to 50% of the overall surface of the area in which they are formed. The wall may be a copper or aluminium pipe wall with the tunnels extending helically. The surface may be formed on a copper pipe by (a) knurling the wall to form shallow grooves (which will subsequently form the openings 4), (b) cutting the wall so as to form deeper grooves which intersect the shallow grooves at right angles, and (c) wire brushing the pipe so as to brush the edges of the deeper grooves over the deeper grooves to form the tunnels 1. The shallow grooves in the brushedover edges provide the openings 4.
Patent GB-1137599-A (GB)
Title: Stabilized power supply unit
IPC: G01R19/00
Filed: 1967-09-21
Abstract: 1,137,599. Automatic voltage control. BÍLKOW G.m.b.H. Sept.21, 1967 [Sept. 22, 1966], No. 43069/67. Heading G3R. [Also in Division G1] ] A stabilized power supply unit having a voltmeter to indicate output voltage and an ammeter to indicate load current is provided with a compensating circuit to correct for zero-point errors in the ammeter. As shown, a power supply unit comprises a regulating element St controlled in dependence upon output voltage variations as detected by a balanced bridge arrangement ABCD constituted by resistors R4-R9 and transistors T1, T2 connected as a differential amplifier, the bridge being associated with a source of reference voltage. A voltmeter V indicates the stabilized output voltage, and an ammeter A, together with its range-selecting resistors R3, is connected into the circuit as shown. Thus ammeter A carries not only the load current, but also the current IQ through the bridge ABCD and the current IV through the voltmeter V; in order that the ammeter should give a correct indication only of load current, the effects of currents IQ and IV are eliminated by means of a compensating circuit which includes an auxiliary voltage source UH. The output voltage of the unit is determined by the setting of a resistor R9 in the bridge ABCD, but for any setting of R9 the current IQ remains constant as the bridge is balanced; thus the effect of IQ on the ammeter A can be eliminated by passing a constant current IK1 through the ammeter in the opposite direction, and thus current is derived from source UH by way of the series resistors R11, R12; the current IV, however, varies with voltage, and the corresponding compensating current IK2 to be passed through the ammeter must vary accordingly; thus, current IK2 is derived from source UH by way of a second resistance circuit including a resistor R15 and a transistor T3 which is biased by a voltage divider R13, R14 connected across the output of the unit and which is thus controlled in dependence upon the output voltage of the unit. The total compensating current through the ammeter thus has two components, one constant and one dependent on output voltage, so that zero-point errors, caused by the necessary presence of the bridge ABCD and the voltmeter V, are eliminated.
Patent GB-1082981-A (GB)
Title: Improvements in or relating to polymerisation process
Inventor: SPARKS ANTHONY ARCHIBALD
IPC: C08F36/18
Filed: 1964-10-24
Abstract: Sulphur-modified polychloroprene is prepared by polymerizing chloroprene alone or with a minor proportion of a copolymerizable monomer in an aqueous emulsion system in the presence of sulphur and dialkyl xanthogen disulphide of formula <FORM:1082981/C3/1> where R1 and R2 are alkyl groups containing from 1 to 8 carbon atoms, the proportion of dialkyl xanthogen disulphide being insufficient to prevent the formation of "solid" polymer. By "solid" polymer is meant a polymer having a M.L. 1 + 41 (100 DEG  C.) of at least 25 as determined by B.S.S. 1673, part 3, 1951, when the rubber is passed ten times through a mill with rolls at 20\sB5 DEG  C. and a nip gap of eighty thousandth of an inch.  Specified comonomers, preferably present in amount less than 10%, are styrene, vinyl toluenes, vinyl naphthalenes, methyl acrylate, acrylonitrile, butadiene, isoprene and 2,3-dichloro-1,3-butadiene.  The preferred amount of sulphur is 0.01 to 2% and that of the disulphide 0.01 to 1.5% both based on the weight of chloroprene monomer and either or both may be totally present at the start of the polymerization or added incrementally. Specified disulphides are bis-2-ethyl hexyl xanthogen disulphide and the dialkyl and diisoalkyl xanthogen disulphides, e.g. the preferred di-isopropyl xanthogen disulphide.  The aqueous emulsion system may be prepared using 2 to 6% of a water-soluble salt of a rosin acid emulsifier while the polymerization may be "short-stopped" by addition of a dialkyl dithiocarbamate, or a p-tertiary butyl catechol/ phenolthiazine mixture.  A reducing agent may also be added.