baber/WOPTO huggingface dataset:
Patent GB-1502253-A (GB)
Title: Spreadspectrum-multiple-access modulation system receiver
IPC: H04B7/216
Filed: 1971-07-28
Abstract: 1502253 Automatic gain control SIEMENS AG 28 July 1971 [30 Sept 1970] 35548/71 Heading H3Q In order to render it capable of handling effective signals with a possible fluctuation in input level of about 60 dB (due to variable usage of the satellite relay by transmitting stations) an SSMA superhet receiver incorporates an arrangement, including a variable gain amplifier 5, which compensates the fluctuations so as to provide an input signal level of a specific value to the two demodulation control circuits 7, 11. The IF stage of the receiver includes a multiplier 6 which multiplies the received IF signal by a codemodulated signal generated in the code-phase follow-up control circuit 7. The demodulator, contained in the carrier phase follow-up control circuit 11, is connected to the multiplier output. Optimum performance of the two circuits 7, 11,  when handling signals distorted by noise components, is only ensured when the input is of a specific value. The variable gain amplifier has two control inputs, one of which derives a control signal IAGC from the multiplier 6 whilst the other derives a control signal CAGC from the demodulator. Selective switching between the control inputs is effected such that in the unsynchronized condition of the demodulator control of the variable gain amplifier 5 is derived from the multiplier output (by signal IAGC), whilst when the demodulator is in the synchronized condition the control of the amplifier is derived from the demodulator output (by signal CAGC). The demodulator circuit (Fig. 2, not shown) is of known construction and operates like a synchronous demodulator. The controlled condition CAGC is derived from the two quadrature branches of the synchronous demodulator. In one embodiment (Fig. 3, not shown), separate outputs (a, b) of the demodulator are connected to respective square-law demodulators (24, 25); each of the latter outputs to a common differential amplifier (26) at whose output the control signal CAGC is obtained. In another embodiment (Fig. 4, not shown), the outputs (a, b) from the demodulator are connected in parallel to a sum amplifier (27) and a difference amplifier (28) whose outputs are fed to a multiplier (29) which produces the control signal CAGC.
Patent GB-1511106-A (GB)
Title: Method and an apparatus for steam curing agglomerates
IPC: B01J2/22
Filed: 1976-08-26
Abstract: 1511106 Treating agglomerates with steam ADVANCED MINERAL RESEARCH AB 26 Aug 1976 [28 Aug 1975] 35593/76 Heading C1A [Also in Division B1] Agglomerates, e.g. pellets or briquettes of particulate minerals, are cured by treatment with steam at elevated temperature and pressure passed through a bed of the agglomerates, with reversal of the direction of flow of the steam through the bed at least once, at least during the initial stage of the treatment. Suitable apparatus is claimed (see Division B1).
Patent GB-854263-A (GB)
Title: Improvements in and relating to lighting appliances incorporating light controlling plates
IPC: F21V5/00
Filed: 1956-11-21
Abstract: 854,263. Street lighting fittings; reflectors. HOLOPHANE Ltd. Nov. 21, 1956 [Nov. 22, 1955], No. 35604/56. Classes 75(2) and 75(4). A lighting fitting, especially for street lighting comprises a compact light source and a reflecting plate of transparent material having prismatic reflecting ribs on its back surface of curvedcontour and such that light incident on the active faces of the prisms is redirected into a beam, the major axis of which lies in a preferred direction, the light source being located relatively close to the plate but at a distance from its front surface not less than half the minimum dimension of the plate. Where two plates are used, one on each side of the light source, their width may be chosen so as to avoid mutual interference with the reflected rays. In order to utilize light falling beyond the edges of the plates, these may be extended by straight or curved pieces having parallel horizontal prisms to re-direct the light downwards. To avoid interference of the light beam by the source, e.g. a fluorescent lamp bulb, the faces of the plates opposite to the source may be provided with vertical prisms to spread the light laterally. Fig. 11 shows a form of lamp having a fluorescent bulb 1 carried in a casing 6 closed by end plates 8. A metallic reflector 5 is carried on the top of the casing, below which are two reflecting plates 2 having a pattern of circular prisms 3 on the side remote from the bulb 1. Parallel vertical prisms 3<SP>111</SP> are provided on the side of the plates facing the bulb to divert the reflected light to either side of the bulb. The lamp holder may be carried by a movable support 18 and the fitting mounted on a light standard by stirrups 17.
Patent GB-912344-A (GB)
Title: Improvements in or relating to electromechanical signalling apparatus
Inventor: ROBINSON KENNETH ARTHUR
IPC: B23Q35/123
Filed: 1958-11-05
Abstract: 912,344. Measuring displacement electrically. LANCASHIRE DYNAMO ELECTRONIC PRODUCTS Ltd. Nov. 3, 1959 [Nov. 5, 1958], No. 35607/58. Class 40 (1). [Also in Group XXXV] To signal the position of a shaft 6 an eccentric ferromagnetic rotor 3 attached thereto is used to unbalance the current in a four-phase stator winding 2 so that an A.C. voltage exists between star point 5 of the winding and neutral N of the supply, and the phase angle between this voltage and a given reference is a measure of the angular position of the shaft. In addition, the rotor as a whole may be displaceable radially from the axis of the stator, Fig. 4 (not shown), when the magnitude of the unbalance voltage is a measure of such displacement. A system is described in which the output of the device is compared with a control signal and any difference in phase produces a voltage which operates a servomotor to position a tool to which the device is coupled. It is stated that the device may also be used for thyratron or ignitron control and, where the rotor is also radially displaceable, it may comprise a tracing head in a copying machine. Specification 770,645 is referred to.
Patent GB-430358-A (GB)
Title: Improvements in or relating to the manufacture of dyestuffs of the indanthrone series
IPC: C09B5/48
Filed: 1933-12-18
Abstract: Vat colours of the indanthrone series are obtained in a highly-dispersed state, easily reducible and valuable for dyeing by the "pigment pad-jig" process, by treating them in sulphuric acid or weak oleum with a soluble cycloaliphatic compound, followed by adding the solution produced to water and isolating the precipitated dye. Indanthrone products specified include chloro-indanthrones in the azine, azhydrine and dihydro-azine form, or mixtures thereof and bromo- and fluoro-derivatives. Cycloaliphatic compounds specified include cyclohexanone, tetrahydronaphthalene, decahydronaphthalene, methylcyclohexanol and 1 - cyclohexyl - 2 - ethoxybenzene.  According to examples N-dihydro 1 : 2 : 2<1> : 1<1>-anthraquinone azine, chlorinated by two methods, and Ponsol Blue GD, are treated with cyclohexanol in sulphuric acid solution giving highly dispersed products on precipitation with water.  The Specification as open to inspection under Sect. 91 referred also to some alkyl, alkoxy, aryl and aroyl substituents, but this subject-matter does not appear in the Specification as accepted.
Patent GB-760202-A (GB)
Title: Improvements in card clothing
IPC: D01G15/86
Filed: 1954-12-09
Abstract: 760,202. Card clothing. ABEELE, V. VAN DEN. Dec. 9, 1954 [May 19, 1954], No. 35641/54. Class 120 (3). [Also in Group VIII] Card clothing has a conventional foundation composed of several plies of cotton, linen or other material on which are superposed several layers of cellular rubber with which fibres are incorporated. Preferably, the layer d farthest from the foundation a has the greatest degree of flexibility. The teeth 2 may be straight or bent. If bent, the knee may be embedded in the cellular rubber.
Patent GB-748529-A (GB)
Title: Improvements in or relating to slipping clutch devices
IPC: F16D7/02
Filed: 1953-12-23
Abstract: 748,529. Slipping clutches. TARPEN ENGINEERING CO., Ltd., and ROSS, J. W. Oct. 5, 1954 [Dec. 23, 1953], No. 35701/53. Class 80(2). A slipping clutch drive, such as for electric hedge-trimmers, comprises a fibre disc 8 interposed between a collar 5 fixed to a driving shaft 1, by a screw 6 engaging a flat or recess, and a worm 2 which is loose on the shaft 1, is urged towards the collar 5 by a spring 4 abutting against a collar 3 pressed on the shaft, and meshes with an output worm wheel 9, the direction of drive being such that load reaction tends to move the worm 2 away from the collar 5. Specifications 618,339, [Group I], 676,108, [Group XXXV], and 679,228, [Group I], are referred to.
Patent GB-1487014-A (GB)
Title: Cephalosporin derivatives
IPC: A01N47/06
Filed: 1975-08-29
Abstract: 1487014 Silylated cephalosporins E R SQUIBB & SONS Inc 29 Aug 1975 35737/75 Heading C3S [Also in Division C2] In Example 53, the antibacterial compound of formula is prepared, wherein R=SiMe 3 , R 1 =Ph, R 2 = Bu and B = 4-hydroxymethyl-2-pyridyl, by forming the link (see also Division C2).
Patent GB-1510641-A (GB)
Title: Weighing wheeled vehicles
IPC: G01G19/04
Filed: 1975-08-14
Abstract: 1510641 Weighing vehicles BRITISH STEEL CORP 14 Aug 1975 [14 Aug 1974] 35841/74 Heading G1W A device for weighing wheeled vehicles comprises a ramp 13, an annular loadcell 17 and a load distribution plate 18 positively located on the loadcell and having a convex upper surface proud of the ramp. The plate 18 has a projection 19 engaging the central passage of the loadcell. The loadcell includes a strain gauge connected in a Wheatstone bridge circuit, and temperature compensation is provided. A further ramp without a loadcell may be provided for supporting another wheel.
Patent GB-1044709-A (GB)
Title: Copper etching method
IPC: C23F1/02
Filed: 1965-08-20
Abstract: 1,044,709. Etching. INTERNATIONAL STANDARD ELECTRIC CORPORATION. Aug. 20, 1965 [Aug. 25, 1964; Oct. 20, 1964], No. 35909/65. Heading B6J. Printed circuits are formed by removing copper from an insulating support by etching with a liquid comprising sulphuric acid and hydrochloric acid. The liquid may also contain phenacetin, sodium metaphosphate and mercuric chloride. The phenacetin may be replaced by salts of pyrophosphoric acid esters or higher molecular aliphatic alcohols, or acetanilide.
Patent GB-894117-A (GB)
Title: Improvements relating to means for lowering equipment into oil wells
Inventor: MOONEY JOHN REUBEN
IPC: E21B17/10
Filed: 1959-10-26
Abstract: 894,117. Wells. HALLIBURTON TUCKER Ltd. Sept. 12, 1960 [Oct. 26, 1959], No. 36226/59. Class 85. Servicing equipment is guided in a well by trolleys 1 ,2 each comprising a cylindrical body 3 mounting wheels 5 adapted to engage the sides of the well. A trolley may be fixed at either end of the equipment, the leading trolley having a nose 7 and the trailing trolley having means for attachment to a lowering cable 9. The arrangement shown in Fig. 3 has the trolleys attached to one another, and the trailing trolley attached to a strip 12 having openings 13 for perforating devices and connected to the cable.
Patent GB-1438568-A (GB)
Title: Windshield wiper blade
IPC: B60S1/40
Filed: 1973-07-31
Abstract: 1438568 Windscreen wipers FISTER SNC DI BOSSO GIACOMO 2C 31 July 1973 [9 Sept 1972 7 May 1973] 36330/73 Heading A4F A windscreen wiper blade comprises a rubber wiper element 3 secured to a supporting member 1 pivotally connected to a connector 2 for a wiper arm, the member I having a substantially constant cross-section except where in an inner surface of the member 1 recesses 21 are provided which permit the member 1 to be deformed so that the whole length of the element 3 engages the windscreen. The supporting member 1 is preferably of thermoplastic material and the recesses 21 decrease in depth and become closer together from the middle to the ends of the member. The rear portion 5 of the wiper element 3 is received in a T- sectioned channel 4 in the member 1. The connector 2 has a recess 13 of rectangular crosssection for receiving the end of a wiper arm having a projection for engagement in a hole 15 in a wall of the recess 13, slots 14 being provided in two other walls to facilitate insertion of the wiper arm. In a further construction a resilient metal element 110 Fig. 6 (not shown) is disposed in the channel 4 between the rear portion 5 of the wiper blade and the connector 1.
Patent GB-397002-A (GB)
Title: Improvements in and relating to devices for drilling polygonal holes
IPC: B23Q27/00
Filed: 1932-12-22
Abstract: 397,002. Drilling polygonal holes. BARTHOLOMAUS, R., 60, Frankfurter Allee, Berlin. Dec. 22, 1932, No. 36352. [Class 83 (iii).] A device for cutting polygonal holes has two axially spaced guides for the tool which are angularly offset to compensate for the torsional distortion of the tool during cutting. The cutter 7 carried by a bush 5 rotatable within the cylindrical casing 1 has a constant diameter section and is constrained by guides 4, 4a to trace the path of a square, the upper guide slides in channels provided in the wall of the casing while the lower one is fixed in one of two positions by set-screws 8, 8a the angular relation of the guide surfaces being such as to compensate for the twist occurring in the cutter. When the work rotates, Fig. 1, the lower guide occupies the position shown and the casing 1 is clamped by screw 16 to the work, the cutter being kept against rotation but fed axially into the work by the sliding shank 2 against pressure of a spring 6 which retracts the tool when the force on the shank is removed. When the device is used with a drilling machine, Fig. 2 (not shown), the lower guide is set flush with the face of the casing and the shank is rotated during the cutter through the pin and slot connection 3a, 5b, the casing being kept against rotation by a plate 14, Fig. 5, with upstanding pegs 15 engaging recesses in the lower face of the casing, which is first clamped in correct position on the work by means of a centring device 19. Holes 1c are provided in the casing for the escape of cuttings and a channel 3b in the driving end of the shank admits lubricant.
Patent GB-1103104-A (GB)
Title: Improvements in or relating to hedge clippers
IPC: A01G3/047
Filed: 1963-09-16
Abstract: 1,103,104. Hedge cutters. G. F. FOWLER. 10 Dec., 1964 [16 Sept., 1963; 7 Jan., 1964], Nos. 36354/63 and 712/64. Heading A1E. [Also in Division B4] In a mechanical hedge clipping tool, a blade edge of at least one blade member is formed with a plurality of notches or abutments at intervals along the blade edge, the notches or abutments being of progressively lesser size as their distance from an originating root point (remote from the blade tip) of the blade increases, the notches or abutments being so formed as to preserve substantially the bevel angle of the remaining straight portions of the blade edge. The blade 10 of the clipping tool shown has a plurality of notches 11 at intervals along the cutting edges of each of its teeth 12.
Patent GB-814460-A (GB)
Title: Pneumatic tyre and wheel rim assembly
Inventor: WRIGHT JOSEPH
IPC: B60C15/036
Filed: 1955-12-20
Abstract: 814,460. Pneumatic tyres. DUNLOP RUBBER CO. Ltd. Dec. 4,1956 [Dec. 20,1955], No. 36413/55. Class 144 (2). An uncured tyre of the form described in Specification 786,162 comprising a continuous cord reinforcement winding 6 extending in a series of loops from one bead 7 to the other across the tyre crown so that the said beads contract to grip a wheel rim 2 on inflation of the tyre, is assembled on a flat-based rim 2 having low integral bead retaining side flanges 4, and cured in situ thereon to bond its beads 7 integrally to the seats 3, Fig. 1 (or 10, Fig. 2) of the rim 2. The rim may comprise brass or copper plated bead seats 3 having a 10 degree taper, Fig. 1, or plated channel-section seats 10, Fig. 2, and may form the inner peripheral part of the mould during curing of the tyre. The tyre may be cured with an inner air bag 11, which remains part of the completed assembly, or may have an air-impervious lining 12 whereby the air bag is dispensed with. The rim 2 may have, on its inner periphery, an integral rib 8, Fig. 1, or a welded V-section ring 9, Fig. 2, for securing the assembly to a wheel body.
Patent GB-168574-A (GB)
Title: Rotary valves
IPC: F16K3/08
Filed: 1920-12-30
Abstract: 168,574. Spuhr, M. Sept. 3, 1920, [Convention date]. Closure members, rotary-disc.-A rotary-disc valve is provided with rollers between the rim of the disc and the casing. The disc 3 is provided with an opening 4 of the same area as the pipe 1, and an opening 5 which is slightly larger, and is fitted with two pistons 6, 7 having packing-rings. A spring 8 presses the pistons outwards against the sides of the casing, and antifriction metal bearing-rings 9, 10 are provided. The valve is turned by means of a worm 16 engaging with worm-wheel teeth 13 formed in the rim of the valve disc. Rollers 17 are provided between the disc 3 and the casing to minimize resistance to turning, and stops 19, 20 limit the amount of movement so that the packing-surfaces 9, 10 fit against the packing-surfaces 11, 12 when the valve is closed. In a modification, Fig. 6, travelling rings 22 carrying rollers 21 are used instead of the rollers 17.
Patent GB-642102-A (GB)
Title: Apparatus for maintaining in predetermined ratio the volumes of liquid in two containers
Inventor: SMITH STANLEY JAMES
IPC: G05D11/13
Filed: 1948-01-09
Abstract: 642,102. Automatic control systems. SIMMONDS AEROCESSORIES, Ltd. Jan. 9, 1948, No. 36480/46. [Class 38 (iv)] [Also in Group XL (c)] Apparatus for maintaining,in predetermined ratio the volumes of liquid in two containers while the liquid is being withdrawn from each by a motor-driven pump comprises a differential relay which is actuated by a control current that varies in magnitude and sign according to the relative volume of liquid in the two containers and which operates to vary the speeds of the two motors if the ratio of liquid in the two containers departs from the predetermined value. The relay comprises two valve oscillators each having an inductance coil and a conductive member which moves between the coils under the influence of the control current so as to stop oscillations in one generator and to produce oscillations in the other so that a relatively small change in the control current produces a relatively large change in the anode current of each of the valves. The Figure shows such a differential relay used in apparatus which maintains in a predetermined ratio the volumes of liquid in two containers A and B (not shown) from which liquid is being withdrawn by electric motor-driven pumps. The volume of liquid in the two containers is measured by instruments 1a, 1b as described in Specification 560,872, [Group XXXVI], so that if the volumes of liquid in the two containers are equal (or in a given ratio) no current flows in the coil 2 while if the volumes are unequal (or not in a given ratio) the current through the coil and thus the movement of the device 3 will vary in magnitude and sign in proportion to the degree and direction of the inequality (or deviation from the given ratio). The moving coil carries a conductive vane 7 which when it moves between either pair of inductors 8a, 9a, or 8b, 9b, reduces the coupling, causing the valve to stop oscillating and the anode current to rise. Thus, when the vane is in the position shown, valve 10b oscillates and valve 10a does not, the anode current of valve 10a accordingly rises, relay 13a operates as shown to de-energize relay 14a and short resistor 15a in the circuit of pump motor 16a to speed up the motor and the rate of withdrawal of liquid from container A. As the level of liquid in A falls, the vane 7 moves from between the inductors 8a, 9a until equality in the volume of the two liquids is reached when the vane is in a position midway between the two pairs of oscillator coils. Valve 10a thus oscillates, de-energizing relay 13a, energizing relay 14a and removing the short from resistor 15a in a similar manner if the vane moves between inductors 8b, 9b, resistor 15b is shorted to speed up motor 16b.
Patent GB-763674-A (GB)
Title: Improvements in and relating to perfluorinated acrylates and polymers
IPC: C08F20/28
Filed: 1954-12-16
Abstract: Homopolymers and copolymers are obtained from 3 - perfluoroalkoxy - 1,1 - dihydroperfluoropropyl acrylate monomers of the formula CH2 : CHCOOCH2CF2CF2O(CF2)nF where n is 1 to 4.  Copolymers may be obtained with butadiene, styrene, acrylonitrile, isoprene, vinyl ethers, acrylates, methacrylates, and halogen derivatives thereof such as perfluorobutadiene and fluoroprene, and with 1,1-dihydroperfluoroalkyl acrylate esters of formula CH2 : CHCOOCH2CnF2n+1.  Latex dispersions are obtained by heating and stirring the monomer at 50 DEG  C. with water, sodium lauryl sulphate, borax and sodium or potassium persulphate.  The latex may be diluted and frozen to coagulate the polymer, which may then be dried.  Copolymers with 1,1-dihydroperfluoroalkyl acrylate esters (see Specification 703,435) and with butadiene may be similarly prepared.  The homopolymers, and copolymers of the monomers with butadiene may be compounded with sodium silicate and calcium hydroxide and cured at 150 DEG  C. at 1800 pounds per square inch pressure.  Copolymers with butadiene may be compounded with stearic acid, zinc oxide, benzothiazyl disulphide, sulphur and carbon black and cured. Homopolymers may be compounded with stearic acid, carbon black, sulphur and triethylene tetramine and cured.  Specification 763,673, [Group IV (b)], also is referred to.ALSO:The invention comprises 3-perfluoroalkoxy-1,1 - dihydroperfluoropropyl acrylate esters of formula CH2:CHCOOCH2CF2CF2O(CF2)nF where n has an integer value of 1 to 4.  The esters are prepared by reacting 3-perfluoroalkoxy - 1,1 - dihydroperfluoropropyl alcohols of formula F(CF2)rOCF2CF2CH2OH with acrylic acid using a promoter such as perfluoroacetic anhydride, or by reacting the alcohols with acrylyl chloride (CH2:CHCOCl).  In examples: (1) 3-perfluoroethoxy-1,1-dihydroperfluoropropyl acrylate is prepared from the corresponding alcohol and acrylyl chloride in the presence of hydroquinone as a polymerization inhibitor; (2) 3-perfluoropropoxy-1,1-dihydroperfluoropropyl acrylate is prepared from the corresponding alcohol and acrylic acid in the presence of hydroquinone and perfluoroacetic anhydride.  The Specification also describes the preparation of the starting material alcohols by reduction with lithium aluminium hydride of esters of perfluoro (b -alkoxypropionic) acids, and the preparation of such esters from the acids, which acids are described in Specifications 763,673. Specification 703,435 also is referred to.