baber/WOPTO huggingface dataset:
Patent GB-775967-A (GB)
Title: Improvements in or relating to windscreen wipers
IPC: B60S1/38
Filed: 1953-12-30
Abstract: 775,967. Windscreen cleaners. O'SHEI, W. E. Dec. 30; 1954 [Dec. 30, 1953], No. 37533/54. Divided out of 775,964. Class 138(1) A windscreen wiper blade comprises a squeegee element and at least one flexible strip extending along and assembled to the squeegee element at or adjacent the rear thereof in a manner which permits the squeegee element to flex in the plane of the squeegee but to restrain transverse flexing thereof, and at least one yoke member disposed along the back of the squeegee element, wherein the flexible strip is formed integrally with the yoke member. As shown in the embodiment of Fig. 1, pairs of strips 2 engaging in grooves 5 in the squeegee 4 are respectively integral with the outer ends of yokes 1, 1a interconnected by a bridge-piece 6 carried by a wiper arm. The inner ends of the strips 2 are slidably engaged in fingers 3 at the inner ends of the yokes. A single yoke and associated pairs of strips may span the whole squeegee in which case the yoke would serve as a bridge-piece. In a modification, the strips 2 extend over the whole length of the squeegee and are integral at their ends with yokes the yokes then being bent towards each other and their inner ends having fingers to slidably engage the central portions of the strips. If desired each yoke may be provided at each end with integral pairs of strips the pairs extending inwardly of the yokes and their free ends being interconnected by members which are respectively slidable relative to one of the opposed pairs of strips. In a further modification the strips are formed in the stamping of a yoke and are subsequently turned inwardly towards each other in directions transversely of the yoke; in this case the strips are integral with one end of the yoke and slidable relatively to the other end as described with reference to Fig. 4 (not shown). The embodiment of Fig. 5 comprises single strips 12 integral with the inner ends of yokes 1, 1a wherein the outer ends 14 of the strips are slidable in slots 15 in the downturned outer ends of the yokes. The strips 12 are provided with fingers 13 to embrace the rear of the squeegee 4. In a modification the strip 12 is integral with each end of a yoke 1 or 1a and the yoke is either flexible or formed of one or more hinged parts whereby the outer ends of the yoke can move towards eac other. More than two yokes may be employed in which case they would be interconnected by secondary yokes with the bridge-piece. Specifications 666,473, 666.474. 675,849, 683,201, 683,675, 775,965 and 775,966 are referred to.
Patent GB-1103007-A (GB)
Title: Improvements relating to gas-blast circuit breakers
IPC: H01H33/16
Filed: 1966-08-22
Abstract: 1,103,007. Gas-blast switches. G. SCARPA. 22 Aug., 1966 [25 Aug., 1965; 15 Sept., 1965], No. 37572/66. Heading H1N. A gas-blast circuit-breaker includes a rotatable control shaft 15 carrying cams 16, 17, 18, engaging with insulating rods 19 connected with the movable contacts 5, 8, 11 to engage them with and disengage them from fixed contacts 3, 6, 10, in a predetermined sequence, the rotation position of shaft 15 indicating the operational state of the contacts at any instant. A further cam 14 on shaft 15 actuates an exhaust valve 12 via insulating rod 13 during the contact opening movement of shaft 15 only. During opening, the contacts 10, 11 are opened first by cams 18, valve 12 is opened by cam 14, then contacts 3, 5 are opened by cams 16, whereupon compressed gas extinguishes the arc as it passes through the hollow tubes 4 on which contacts 3 are mounted, then contacts 6, 8 are opened by cams 17 and the gas extinguishes the arc of the current circulating in the resistances 9 as the gas passes through tubes 7, and finally cam 14 closes valve 12 again to interrupt the exhaust of the compressed gas from metal receptacle 1 via hollow contacts 3, 6. .
Patent GB-946846-A (GB)
Title: A process for the catalytic polymerisation of aldehydes
IPC: C08G2/00
Filed: 1961-10-20
Abstract: A pure saturated mono-aldehyde is polymerized in the presence of a thiocyanate catalyst. Specified aldehydes are formaldehyde, acetaldehyde propionaldehyde, butyraldehyde, isobutyraldehyde, valeraldehyde, hexaldehyde, mono-, -di-, and tri chlor acetaldehyde and chloral.  The reaction may take place in a medium of acetonitrile benzene, or heptane while potassium thiocyanate tetramethyl ammonium, trimethylhexadecyl ammonium, hexadecyl pyridinium, and lauryl pyridinium, thiocyanates and phosphonium thiocyanates may be used as catalysts.  Small amounts of a dialdehyde e.g. glyoxal or adipaldehyde may be present to cause cross-linking.
Patent GB-1532339-A (GB)
Title: Keyboard and notation system
IPC: G10G1/00
Filed: 1977-09-09
Abstract: 1532339 Keyboards M H SOHLER 9 Sept 1977 37722/77 Headings G5J and G5X A keyboard instruction for, e.g. a piano comprises for each octave four groups of keys, each group comprising two elongated flat keys 16a, 16b (Fig. 1) and one raised key 18. The raised keys are mounted on arms for attachment to the piano action. The key representing C is distinctively marked. In a modification (Fig. 7, not shown) a second set of raised keys is added adjacent the back board. A notation for use with the keyboard (Fig. 4) comprises a stave of eight lines, notes being marked on, below and above each line so that each octave covers four lines.
Patent GB-1317089-A (GB)
Title: Trench shoring
IPC: E02D17/08
Filed: 1971-08-11
Abstract: 1317089 Trench shoring J HESS P CHRISTEN and O WALTHER 11 Aug 1971 [13 Aug 1970] 37747/71 Headings E1E and E2B In a trench shoring system wherein each wall of the trench is supported by spaced H- girders 1 interconnected by wallings 5 and the girders 1 on opposite walls of the trench are spaced apart by jacks 15, the wallings 5 are positioned at an angle as shown in order to furnish hand- and foot-holds for the workmen. The wallings 5 are of profiled sheet steel and have projecting pins 7, 7' to engage a fixing hole 4 in the girder and rest against the edge of the girder as shown in Fig. 5, adjacent sections of the wallings being clamped to-gether by a band 8 having a pivot pin 11 therein which is provided with an eccentric 12 and a boss 13 for engagement with a locking key.
Patent GB-369217-A (GB)
Title: An improved grid electrode for electron discharge tubes
IPC: H01J19/38
Filed: 1930-12-15
Abstract: 369,217. Thermionic valves. STANDARD TELEPHONES & CABLES, Ltd., BEDFORD, L. H., COVENEY, D. G., and SMITH, E. O., Columbia House, Aldwych, London. Dec. 15, 1930, No. 37785. [Class 39 (i).] A grid has two cooling fins 1, Fig. 1, in contact over a large surface with the ends of the grid wires 6, the free length of the grid wires being substantially equal to the circumference of the grid ; the edges 10 of the fins are preferably flanged to give additional support to the grid wires. Recesses 2 may be provided for receiving supports. As shown in Fig. 4, the grid is formed by winding wire over the fins 1, mounted on a block (not shown). The wire is roller welded under alcohol at the flanges 4 and the unwanted portions 5 of wire are cut away. The fins and wire are removed from the block and the fins turned outwards so that the wires form a tubular grid. In modifications the wire is wound around (a) a single plate having central openings, or (b) two circular mandrels, one of which is used as the grid support, or (c) a helical grid is lashed to a grooved plate secured between the fins. The grid may be formed from gauze by removing the longitudinal wires and resetting the lateral wires by stretching, the edges being plain gauze.
Patent GB-1506960-A (GB)
Title: Test equipment for submarine coaxial telephone systems
IPC: H04B3/48
Filed: 1975-09-16
Abstract: 1506960 Testing telecommunication systems STANDARD TELEPHONES & CABLES Ltd 16 Sept 1975 37986/75 Heading G1U A system for testing a coaxial telephone line includes measuring received signal levels at near and far stations, the level at the far station being transmitted back to the near station, and wherein transmissions in opposite directions over the line are made in separate frequency bands. The system is controlled by a programme stored on tape, read by reader 1 at the near station A, e.g. on a cable-laying ship, which reader controls a control unit 2 to set the near station and the far station B, e.g. at the land terminus of the cable.  Testing from A to B. Control 2 sets a coaxial switch 3 to connect an oscillator 4 to filter 5 which directs the low fre-  quency signals to the line and thus to station B. Filter 10 directs the low frequency signals to a counter 12 which detects the frequency and thus control 13 sets switch 14 to connect a frequency synthesizer 15 to filter 10. At A, interface 16 is set to ignore values above the decimal point in the output of counter 17. At the next programme step, a frequency synthesizer 20 is set to generator a low test frequency, f 1 ,from oscillator 4. On reception at B, and f 1 , determined by counter 12, control 13 sets the synthesizer 21 to tune detector 22 to f 1 . Since detector 22 also receives the received signal, its output represents the received level and is provided as a frequency proportional to the level. This is converted to a high frequency by a digital meter 23, converter 24 a synthesizer 15. For Example if the received level is 44.63 dB, synthesizer 15 produces 10.4463 MHz. On reception at A, counter 17 (via pre-amp 25) determines the frequency, and the level representative part 4463 is passed by interface 16 to recorder 18 which prints the level along with the test frequency f 1  from a counter 26. This step is then repeated for other values of f 1 . Testing from B to A  In a similar means to the above, A is set to receive (oscillator 4 disconnected, synthesizer 27 connected) and B is set to receive (oscillator 28 switched in placed of synthesizer 15). Measurement of levels received at A from B now takes place as in the method above, but the test frequency transmitted by B is set by the master station A. A low frequency signal eaual to f 2 ¸ 10 is transmitted to B which on reception thereof sets synthesizer 21 to generate f 2  from oscillator 28. The received signal is detected 30 and the level indicated by digital meter 31 as was done above in station B.
Patent GB-827880-A (GB)
Title: Improvements in the production of regenerated cellulose filaments and fibres useful in the production of voluminous textile materials
IPC: D01F2/06
Filed: 1956-12-13
Abstract: In the manufacture of regenerated cellulose fibres having a high shrinkage potential, e.g. 20-30% when immersed in boiling water with elongation at break of about 20% (wet), viscose is spun at a speed of 70-120 metres per minute through a tube immersed in a spinning bath and coaxial with the spinneret, the acidity of the bath being 120-125 grms. of sulphuric acid per litre, sodium and zinc sulphate contents 230-250 and 125-130 grms. per litre, the salt point being above 7% and the viscose being heated to the temperature of the bath immediately on the upstream side of the spinneret, and the filaments are dried under a tension sufficient to prevent shrinkage.  These filaments (then having elongation at break of about 45%) are wet stretched, e.g. in a dilute aqueous bath at 85 DEG  C., in one or more stages to a degree close to their elongation at break, e.g. 60-70% thereof or 30% of their original length, before or after the drying operation.  On leaving the spinneret, the filaments are drawn up to 25%.  The viscose or the bath may contain one or more components e.g. thiodiglycol and polyhydroxyethylenes, which promote formation of thick-skinned filaments.  The filaments may be stapled by cutting or stretching to break, e.g. by the process described in Specification 774,360, [Group IX], and the filaments or staple fibre may be blended with filaments or fibres having high tenacity, low elongation and high resistance to shrinking under the action of hot water, e.g. cellulose acetate fibres or viscose fibres obtained by the process described in Specification 650,896, and spun into yarn. Bundles of the two forms of filaments may be formed into a blended yarn which is drafted to break the filaments into staple lengths within the yarn.  The composite yarn is bulked by subsequent subjection of yarn or fabric made therefrom to the shrinking action (on one yarn constituent) of a hot aqueous medium which may be combined with dyeing and followed by treatment with 5% of a ureaformaldehyde resin to render the fabric crease-and shrink-proof to washing.  Specifications 655,516 and 778,746 also are referred to.
Patent GB-1395805-A (GB)
Title: Electro-optically acrice compositions and devices including such compositions
IPC: G02B5/30
Filed: 1972-08-16
Abstract: 1395805 Liquid crystal compositions SPERRY RAND CORP 16 Aug 1972 [9 Sept 1971] 38180/72 Heading C4X [Also in Divisions C2 and H4] A nematic liquid crystal composition with negative dielectric anisotopy which becomes birefringent or light scattering when an electric field is applied (see Division H3-H5) comprises an alkoxybenzylidene - p - n - butylaniline (the alkoxy group may be ethoxy or n-butoxy) mixed with either pentyl p-anisylidene p-aminophenyl carbonate or p-toluylidene-p-n-butylaniline. An ionizing material such as 1% of p-ethoxy-(or n-butoxy-) phenol may be added.
Patent GB-1199797-A (GB)
Title: Methine Dyes
Inventor: BROOKER LESLIE GEORGE SCOTT
IPC: C07D209/60
Filed: 1967-08-18
Abstract: 1,199,797. Methine dyes. EASTMAN KODAK CO. 18 Aug., 1967 [17 Jan., 1967], No. 38253/67. Addition to 1,075,653. Heading C4P. [Also in Division G2] The invention relates to methine dyes of the formulµ wherein n represents 1, 2 or 3, m represents 1 or 2, g represents 0 or 1, d represents 1 or 2; R and R<SP>1</SP> represent alkyl including cycloalkyl or substituted alkyl, e.g. aralkyl or hydroxyalkyl of 1-18 C, alkenyl, aryl or substituted aryl, R<SP>3</SP> represents alkyl or substituted alkyl containing 1 to 12 C or allyl, R<SP>4</SP> and R<SP>5</SP> represent alkyl or substituted alkyl of 1-6 C, R<SP>8</SP> represents halogen, e.g. Cl, Br, or I, nitro or cyano, and R<SP>9</SP> represents hydrogen, or when R<SP>8</SP> represents halogen R<SP>9</SP> may represent halogen or R<SP>8</SP> and R<SP>9</SP> may together represent a fused aromatic carbocyclic ring, Z and Q represent the non-metallic atoms necessary to complete an heterocyclic nucleus containing 5 or 6 atoms in the heterocyclic ring, G is 1-methyl-2-phenyl indol-3-yl-, 9-methyl carbazol-3-yl, or 2-methyl- or 2-(3-sulphopropyl)-3-phenyl-5-oxo-3-isooxazolin-4-yl, and X represents an acid anion. The dyes are prepared by methods analogous to those described in Specification 1,075,653. The dyes are used to vary the sensitivity of silver halide emulsions (see Divisions G2/G3).
Patent GB-1534597-A (GB)
Title: Process and apparatus for heat treating elongate thermal insulating shells
IPC: C21D1/74
Filed: 1976-09-16
Abstract: 1534597 Endless conveyers SAINT-GOBAIN INDUSTRIES 16 Sept 1976 [22 Sept 1975] 38370/76 Heading B8A Workpieces A, e.g. tubes, are conveyed through a hot gas heat-treatment zone at successive levels and in successive opposite directions, the workpieces being rolled the while about axes normal to their direction of movement. As shown the tubes are rolled along perforated plates 3 by bars 4 carried between a pair of endless chains 5. The upper and lower runs of the chains are used to convey the tubes in successive different directions. Transfer between the upper and lower runs and from one conveyer to the next is by gravity. The plates 3 may be inclined to the horizontal (Figs. 4 and 5, not shown). A particular application described is the heating of resin bonded fibrous shells in a gas-fired oven in order to harden the resin (Fig. 1, not shown).
Patent GB-874163-A (GB)
Title: Improvements in or relating to a power transistor
IPC: H01L29/00
Filed: 1958-11-28
Abstract: 874,163. Transistors. SIEMENS-SCHUCKERTWERKE A.G. Nov. 28, 1958 [Nov. 30, 1957], No. 38470/58. Class 37. In a power transistor comprising a monocrystalline silicon wafer with highly doped emitter and collector regions of one conductivity type, and an intermediate, less highly doped, base region of opposite conductivity type, in which a collector electrode occupies a substantial part of one surface of the wafer while the opposite surface is occupied by a base electrode having one or more gaps to accommodate one or more strip - shaped emitter electrodes having a total area of several square millimetres sufficient for heavy current purposes, the width of the or each emitter strip lies between 2#2L/3 and 6#2L, where L denotes the diffusion length under conditions of high-level injection. In Fig. 2b, an annular gold-antimony emitter electrode E is disposed between aluminium base electrode elements B1, B2' on one surface of a p-type silicon wafer S, and a gold-antimony collector electrode (not shown) covers most of the opposite surface, the electrodes being alloyed to the wafer as described in Specifications 827,762 and 840,241. The width of the emitter strip may be, e.g. 0.8 mm. or 1.0 mm., for a diffusion length of 0.3 mm. The width may deviate from a preferred value of 2#2L by a factor of three either way to allow an emitter of manageable size to be used with lower diffusion lengths; alternatively, a narrower emitter, down to a width of about 0.4 mm., may be applied by vapour coating or electrolysis. In another embodiment, Fig. 3a, two annular emitter electrode elements E are disposed in the spaces between three annular base electrode elements B on one face of a discshaped wafer S and the collector electrode C covers the other face and the edge of the wafer. A plate T of tungsten or molybdenum coated with gold may be secured to the collector electrode by heating at 400%. In the transistor shown in Figs. 4a, 4b base and emitter electrodes B, E in the form of longitudinal strips are secured alternately on one face of the wafer, leads ZB, ZE of copper, which may be silverplated and the gold-plated, being provided, ZB being welded to strips B and ZE being tinsoldered to strips E. Similar leads may be provided on the above described annular electrodes, and may be disposed cross-wise or in star form. In Fig. 5 (not shown), emitter and base electrode are of comb-pattern, the digits of the emitter extending between the digits of the base electrode.
Patent GB-363141-A (GB)
Title: Improved manufacture of magnetos and ignition systems for internal combustion engines
IPC: F02P7/02
Filed: 1930-12-22
Abstract: 363,141. Switch cases. FABBRICA ITALIANA MAGNET MARELLI, 22, Corso Venezia, Milan, Italy. Dec. 22, 1930, No. 38581. Convention date, Dec. 24, 1929. [Class 38 (v).] The ignition system of an internal-combustion engine is screened by applying to the surface of insulating material enclosing the conducting elements, such as the casing of the magneto or of the distributer, an adhering layer of metal; this can conveniently be done by spraying with aluminium. The Figure shows a portion 1 of the casing of a distributer covered with such a layer 5. The layer extends over the seatings into which the ends of the cables 4 fit and makes contact with the metal sheathing thereof.
Patent GB-968305-A (GB)
Title: Process for the preparation of metal ammonium phosphates
IPC: C01B25/40
Filed: 1962-10-11
Abstract: Metal ammonium phosphates are prepared by continuously introducing into a reaction zone, with mixing to provide constant pH throughout the reaction zone, (a) an aqueous solution of phosphoric acid and of a water-soluble salt of Mg, Zn, Cd, or divalent Mn, Ni, Fe or Co, and (b) enough ammonia to maintain pH of at least 6.5 and continuously withdrawing the slurry containing the resulting metal ammonium phosphate, the average residence time in the reaction zone being greater than 3 minutes.  The salts are preferably sulphates and the concentration of divalent metal ion in the solution is preferably not greater than 5% in excess of the stoichiometric amount.  The temperature is preferably 75-90 DEG  C.  The ammonium phosphate present in the reaction zone serves as seed crystals for new produced phosphate.  The product is withdrawn as a slurry of phosphate in a solution of the ammonium salt by-product; the phosphate may be filtered off, washed and dried, or the slurry may be directly dried, yielding a mixed metal ammonium phosphate and ammonium salt.  The product may be used as fertilizer.
Patent GB-1483849-A (GB)
Title: Semiconductor laser device equipped with a silicon heat sink
IPC: H01S5/0233
Filed: 1975-09-22
Abstract: 1483849 Semiconductor lasers NIPPON ELECTRIC CO Ltd 22 Sept 1975 [21 Sept 1974 25 Sept 1974 5 Oct 1974 (2)] 38842/75 Headings H1C and H1K A semiconductor laser is bonded on a silicon crystal heat sink. In Fig. 1, a GaAs or AP 0À3  Ga 0À7 As semiconductor laser 5 is thermally bonded to a titanium and tin layer 4 coating a silicon crystal 3, the semiconductor being mounted in alignment with an edge of the crystal to prevent the divergent laser output beam from being partially obstructed. Alternatively the layer 4 may consist of copper, Fig. 2 (not shown). In a modification, Fig. 4, the laser is mounted inwardly of the crystal edges, the crystal being indented to avoid beam interference. A semiconductor laser array is shown in Fig. 5, in which the heat sink 3 comprises N-type silicon, with P-type isolation regions 12 formed by boron diffusion to which P-type supply leads 19 are connected. The laser array is formed by a GaAs semiconductor body 14, 15 with a P-N function 16, the individual lasers being defined by indium strip electrodes 17 which are used to bond the body to the regions 12. A common N-type supply lead is connected to the N-type region 14 of semiconductor body. As a protection against damage by current reversal a shunting diode may be connected to the semiconductor, and in Fig. 6 such a diode is provided by a P-type region 25 formed by boron diffusion in an N-type silicon heat sink 3. Aluminium leads 19 connected semiconductor laser electrode 21 and an aluminium diode electrode 24 to one terminal of the D.C. power supply. The semiconductor laser 5 consists of a GaAs-Ga 1-x AP x As double heterostructure having a P-type gold electrode 23 bonded to a tin and chromium sandwich layer 26, 27 extending partially over the heat sink surface. The silicon heat sink has further layers 28, 2 of chromium and gold by which it is secured with PbSn solder to a copper casing 1. In the remaining embodiments, Figs. 7 to 9, a photodetector 31 is used for monitoring the laser output, and is formed by diffusing boron into a portion of an N-type silicon crystal heat sink 3. A further P<SP>+</SP> isolation region 32 also formed by boron diffusion is provided in the heat sink, the semiconductor laser 5 being mounted on this region. In Figs. 7 and 9 the photodetector 31 directly monitors a divergent portion of the laser output, while in Fig. 8 monitoring is effected of light spilt out of a coupling optical fibre 39. In the Fig. 7 and 8 arrangements a change of photodetector current caused by a change in laser output is denoted by a change of voltage across a resistor R1, and is used to adjust the semiconductor laser current through resistor R2. In Fig. 9 the circuit components necessary for such current control are formed integrally in the silicon heat sink, and comprise transistors 34, 35 and isolation regions 33. The external resistors R3 to R7 shown may also be formed by integrated circuit techniques. The equivalent electrical circuit is shown in Fig. 10.