baber/WOPTO huggingface dataset:
Patent GB-1451310-A (GB)
Title: Positioning arrangement using a liquid crystal device
IPC: G01B11/26
Filed: 1972-12-02
Abstract: 1451310 Measuring angular position MARCONI CO Ltd 2 Nov 1973 [2 Dec 1972] 55795/72 Heading G1A [Also in Divisions G2F and G3R] When a dynamic scattering liquid crystal cell 14 is subjected to a very low frequency A.C. voltage e.g. about 10 Hz, the light from an ambient source scattered thereby pulsates with an amplitude depending on the direction in which the cell is viewed (as indicated in a polar manner in Fig. 2). In an arrangement for angularly positioning a member e.g. a mirror 10, the cell 14 is secured thereto and light scattered from the cell at different angles is received by two photo-cells 16, 18 feeding a differential amplifier 20. An error signal from amplifier 20, which is a function of the difference of amplitude of the pulsating component at each cell, controls a motor 24 for pivoting the mirror 10. In a preferred arrangement, photo-cells 16, 18 are placed so that when mirror 10 is correctly disposed, the amplitude of the pulsating light component are equal.
Patent GB-1326399-A (GB)
Title: Compounded liquid crystals cells
IPC: G02F1/1343
Filed: 1970-11-25
Abstract: 1326399 Modulating light RCA CORPORATION 25 Nov 1970 [2 Dec 1969] 55965/70 Heading H4F When modulating light by using a (nematic) liquid crystal cell of the type which is normally transmissive but scatters light when an electric field is applied across the liquid crystal, or vice versa (quiescent scattering), increasing the thickness of the liquid crystal layer between the electrodes gives more available contrast but also increases the cell response time. By using a plurality of liquid crystal cells in tandem along the light path, the contrast may be increased while maintaining the response time constant. The cells may be operated simultaneously, or selectively so as to control the resulting light intensity. An array of such pluralities of cells may be formed and precise constructional details are given of a row array formed as an integral unit and useful for recording signals, e.g. from a fascimile system or computer, on an electrophotographic sheet, the pluralities of cells being sequentially scanned and the sheet being moved normally of the row array.
Patent GB-1271048-A (GB)
Title: Guide means
Inventor: WHITMORE THOMAS CLEMENT
IPC: H05F3/02
Filed: 1970-11-26
Abstract: 1,271,048. Feeding webs. EASTMAN KODAK CO. 26 Nov., 1970 [28 Nov., 1969], No. 56226/70. Heading B8R. [Also in Division F2] An anti-static web feeding guide or roller consists of an electrically conductive member covered with a layer of elastomeric plastics material made from a mixture of a vinyl chloride resin and at least one alkyl phthalyl alkyl glycolate. The roller shown consists of a hollow aluminium core 12 with an outer layer 13 of tubing made from a mixture by weight of 79% vinyl chloride resin, 19À3% butyl phthalyl butyl glycolate and 1À7% ethyl phthalyl ethyl glycolate. The core is formed with stub axles 14 carried by an earthed frame 17. The inner core 12 may be made from any material with a volume resistivity of not more than 1 x 10<SP>10</SP> ohm-cm.
Patent GB-1244970-A (GB)
Title: Improvements in the production of metal oxides
Inventor: WILSON WILLIAM LESLIE
IPC: C01B13/28
Filed: 1968-11-28
Abstract: 1,244,970. Vapour-phase halide oxidation. P.P.G. INDUSTRIES Inc. 28 Nov., 1968, No. 56413/68. Addition to 1,108,425. Headings C1A and ON. [Also in Divisions C7 and H5] In the preparation of finely-divided metal oxide (including As, B, P and Si oxides) by the vapour phase oxidation of metal halide with an oxygenating gas in a reaction zone at elevated temperature, heat is furnished to the reaction zone by passing a heated gas thereto, the gas (which may be the metal halide, oxygenating gas, or gas inert in the reaction conditions) being heated by passage through an electric discharge conducted between electrodes at least one of which comprises at least 72 wt. per cent Ag and at least 1 wt. per cent Cu in the portion subject to wear by the discharge and has 0À0005-0À1 vol. per cent of voids measuring 0À019-0À04 inch in any one dimension. Oxygenating gas is defined as O 2 , a free O 2 -containing gas or an oxidizing gas. As shown, for the production of TiO 2 , an arc A is established between watercooled cylindrical electrodes 1 and 8, the upper end of the arc being kept in motion by the . magnetic field produced by coil 3. Gas to be heated (oxygen) is admitted through inlet 6, is heated by arc A possibly to the plasma condition, and then passes through electrode 8 and passage 10, where it may be mixed with and cooled by a secondary oxygen stream introduced through nozzle 12, into reaction zone 17. TiCl 4  is admitted to reaction zone 17 from annulus 19. To prevent reaction of the oxygen and TiCl 4  adjacent to their inlets, a stream of gas inert in the reaction may be interposed by emission from concentric annulus 18. Other configurations of electrodes are described with reference to Figs. 1, 2, 5 and 6 (not shown). Apart from TiO 2 , reference is also made to the production of oxides of Al As, B, Fe, P, Si, Sr, Sn, Ti, Zn, Zr, Nb, Sb, Pb and Hg. Additives for improving pigmentary products may be introduced to the reaction, e.g. AlCl 3 , ZrCl 4 , SiCl 4 , alkali metals or alkaline earth metals or compounds thereof such as KCl, K 2 SO 4 , KNO 3 , K acetate and phenyl potassium.
Patent GB-1137728-A (GB)
Title: Improvements in or relating to magnetic door catches
Inventor: EDWARDS ALUN
IPC: E05C19/16
Filed: 1966-12-19
Abstract: 1,137,728. Magnetic catches. JAMES NEILL HOLDINGS Ltd. 4 Dec., 1967 [19 Dec., 1966], No. 56615/66. Heading E2A. A magnetic door catch has the casing of the magnet and a striker plate secured to a door frame 1 and door 4 by a self adhesive layer 19, 21 having a protective layer which is removed before securing. A layer of thin framed plastics may be secured between the self adhesive layer and casing or striker plate. Pole pieces 14 extend from each open end of the casing 5 and are rockably mounted on a peg in the casing to rock in two mutually perpendicular directions.
Patent GB-1236770-A (GB)
Title: Electrical heater
Inventor: NIXON HECTOR MICHAEL
IPC: F24H7/02
Filed: 1968-12-03
Abstract: 1,236,770. Space heaters. DIMPLEX Ltd. 2 Dec., 1969 [3 Dec., 1968], No. 57276/68. Headings F4S and F4U. A combined storage space heater and convector heater has a refractory heat-storage core heated by electric heaters and consisting of at least two parts 2, 3 relatively movable to open or close an air-flow passage 11 defined by said parts, the core being surrounded by thermal insulation, attached also to the movable part or parts. Figs. 2 and 3 show one arrangement wherein the core part 3 has a tapered opening therethrough to receive a correspondingly shaped core part 2 recessed at 9 to accommodate electric heaters 10 and movable vertically to define the air passage 11, Fig. 3, through which the air may circulate by either forced or natural convection as shown by the arrows. Insulation 5 surrounds the core and covers the ends of the movable core part 2. The core part 2 may be prismatic in shape (Fig. 1) or it may be a truncated cone. The core may consist of a plurality of side-by-side independently movable core parts. Fig. 5 shows another arrangement where both core pieces 13, 14 are simultaneously moved (vertically on guides 16, 17) by means of a pivoted lever arrangement 15 to open or close air passage 24 in which are located electric heaters 25, these not moving with the core pieces but remaining stationary. Insulation 18 surrounds the core. In this arrangement relatively cool air flowing through air ways 28 around the core, mixes above the core with air heated in the passage 24, the mixture exhausting from the apparatus through vent 21. Temperature regulation (not described in detail) which may be controlled in accordance with ambient tempertaure, may be effected by changing the force of air flow through the passage, altering the width of the passage and/or switching on or off some or all of the electric heating elements.
Patent GB-1310377-A (GB)
Title: Telephone set speech networks
IPC: H03H11/12
Filed: 1970-12-04
Abstract: 1310377 Substation circuits WESTERN ELECTRIC CO Inc 4 Dec 1970 [8 Dec 1969] 57664/70 Headings H4R and H4K A telephone antisidetone circuit comprises a resistive hybrid bridge which is coupled to a transmitter and receiver via respective equalizer circuits that incorporate operational amplifiers. The receive side equalizer includes a frequency equalizer in or coupled to the feedback circuit of the amplifier, the frequency equalizer being disabled whenever an outgoing speech signal exceeds a predetermined level so as to reproduce high frequency components that are liable to cause singing in the receive path. The substation circuit shown in Fig. 1 incorporates, in the transmit path from a variable reluctance transmitter Tr, an A.G.C. and noise discrimination circuit. The latter may comprise a balanced variolosscr employing saturated transistors or varistors and is terminated by a differential amplifier having good common mode rejection. Noise suppression switching is based on the input level to the circuit. Each of the equalizers 103, 107 includes in its feedback path, a variable resistor, e.g. a saturated transistor, which is controlled by regulator 108 in dependence on the D.C. current flowing in the loop, i.e. upon loop length. The transmit equalizer also incorporates a capacitor between the feedback path and ground for providing the desired frequency equalization-in effect a high-frequency boost. The receive equalizer is similar but incorporates a switch in series with the capacitor, the switch being operable by a control signal from the transmit A.G.C. circuit so as to cut-out the frequency equalization. The hybrid 104 may be of the type described in Specification 1,189,377. The high impedance 1500 # electromagnetic receiver RE may be fed from the receive side A.G.C. circuit 106 via a pair of differential emitter-followers. A multifrequency dialling technique is used, the A.G.C. circuit being cut-out while a higher than usual operating voltage is derived from line via power supply 108 during dialling.
Patent GB-1209047-A (GB)
Title: Rail clamp
Inventor: HALL CECIL PERCIVAL
IPC: B66C1/64
Filed: 1967-12-19
Abstract: 1,209,047. Article engaging devices. D. WICKHAM & CO. Ltd. 19 Nov., 1968 [19 Dec., 1967], No. 57678/67. Heading B8H. A clamp for attachment to a rail 11 to enable the rail to be lifted comprises abutment members 12 which abut flanges on opposite sides of the rail when cams 19 are rotated into a clamping position between the members 12, in which each cam engages the top of the rail and forces a bolt 17 interconnecting the members 12, upwardly. The bolts 17 are received in slots 18 in the members 12 and permit the pivoting shown, to release the rail when the cams are in the unclamp position, in which slotted projections (not shown) narrower than the main body 19 of the cam remain in engagement with the bolts 17 between the members 12. The abutment members 12 are pivotted at 13 to a shackle 14 associated with a lifting cable 16.
Patent GB-1208196-A (GB)
Title: Process for the liquifaction of nitrogen-containing natural gas
IPC: F25J3/02
Filed: 1968-12-05
Abstract: 1,208,196. Natural gas liquefaction process. MESSER GRIESHEIM G.m.b.H. 5 Dec., 1968 [20 Dec., 1967], No. 57849/68. Heading F4P. Compressed nitrogen-containing natural hydrocarbon gas in a line 1 is liquefied and subcooled in heat exchanger 2, 3 traversed by two multi-component refrigerants each in a closed circuit having a single compression stage 10a, 19 and the L.N.G. is expanded at a valve 7 into a fractionating column 6 from which nitrogenfree liquefied natural gas is withdrawn through a line 8, pure nitrogen through a line 10b and a partly gaseous mixture of methane and nitrogen is withdrawn through a line 21, liquefied in an exchanger 4 cooled by the colder of the two refrigerants, undercooled in an exchanger 9 in countercutrent heat exchange with itself after expansion through a valve 22, and the cold so produced is used in exchangers 9, 4 to sub-cool the nitrogen free L.N.G. in line 8 to a storage temperature of about -160 C.; the so-vaporized methane-nitrogen mixture being warmed to ambient temperature in exchanger 2, 3 and delivered as fuel gas. The first refrigerant comprises a mixture of C 1  to C 4  saturated hydrocarbons which having been compressed at 10 to 40 atmosphere and cooled to ambient temperature in a water-cooled heat exchanger 11 is in the liquid phase, and is cooled to - 75 C. in exchanger 2 by heat exchange with itself after expansion through a valve 13. The second refrigerant comprises a mixture of methane, ethane and nitrogen which is delivered by a compressor 19 and a water-cooled exchanger 20 into a line 15 in the gaseous phase and is liquefied and cooled in exchangers 2, 3, further cooled in a coil 16 of column 6 and is thereafter further cooled in exchanger 4 in heat exchange with itself after expansion through a valve 17, after which the refrigerant is warmed to ambient temperature in exchanger 3, 2 and returned to the compressor inlet.
Patent GB-1199388-A (GB)
Title: Upholstery Spring Cores.
Inventor: MOLT OTTO PAUL
IPC: A47C27/06
Filed: 1968-12-10
Abstract: 1,199,388. Mattresses. O. P. MOLT. 10 Dec., 1968 [12 Dec., 1967], No. 58535/68. Heading A4M. A spring core for a mattress comprises coil springs 3 connected in rows by helical interlacing wires (5) and disposed between upper and lower border frames 1, 2, and includes edge spring elements 6 extending inwardly of the core between adjacent springs 3, each element 6 being formed of spring wire and comprising a pair of divergent arms 7, 8 with bent ends 7a, 8a, secured by clips 12, 13 to the border frames 1, 2, the arms 7, 8 being integral with an interconnecting helix 9 with an axis parallel to the axis of the coil springs 3. In a modification, Fig. 7, the end of one arm 27 is bent into U-shape, one limb 28 of the U being secured to the lower frame 25 and the other limb 29 carrying a resilient plastics sleeve 30 acting as a stop which engages the frame 25 on compression of the core. In another embodiment, Fig 4. The upper arm 7 has an extension 15 clipped, as at 17 to a forwardly projecting frame part 21 secured, at 22 to the upper frame 1, and a rearwardly bent part 18, 19 clipped, at 20, to the upper frame 1.
Patent GB-1198969-A (GB)
Title: Improvements in or relating to Process for Preparing a Glycerol Ester
IPC: C11C3/00
Filed: 1969-04-17
Abstract: 1,198,969. Glycerol-2,3-carbonate. SMITH KLINE & FRENCH LABORATORIES. 17 April, 1969 [19 April, 1968], No. 59122/69. Divided out of 1,198,968. Heading C2C. Glycerol-2,3-carbonate is prepared by reacting (2,2 - dimethyl - 1,3 - dioxolan - 4 - yl) methyl/2,2,2-trichloroethyl carbonate with a weak acid such as H 3 BO 3 /Me 3 BO 3 , or HOAc.
Patent GB-1413316-A (GB)
Title: Roll handling apparatus
IPC: B66C13/16
Filed: 1972-12-21
Abstract: 1413316 Article handling apparatus; packaging H F DALGLISH 21 Dec 1972 [6 Jan 1972] 59230/72 Headings B8H and B8C [Also in Division G1] Apparatus for handling a roll of material B by means of which it is possible to wrap, lift and weigh the roll, comprises a runway 10 along which the roll is moved until it is received in a V-shaped section 12 of the runway 10, the section 12 having rollers (29) which permit rotation of the roll about its axis, Fig. 4 (not shown), a probe 47 which has expansible jaws (not shown) for engagement with the inner surface of the core of the roll being pivotally mounted on a frame 46 which moves vertically within guides 45 mounted on a carriage 40 under the action of a ram (79), Fig. 3 (not shown), the carriage 40 being movable towards the runway 10 on a pair of parallel I-beams (31), 32, Fig. 1 (not shown). When a roll B is located in the section 12 of the runway 10 as shown it is wrapped by means of a roll of wrapping paper 72 whose end is taped to the roll B at 75 and a chuck 62 which is attached to a motor 63 is moved from its position shown in full lines in Fig. 2 to its position shown in dotted lines in which the chuck 62 engages the core of the said roll, and the motor is then driven to cause the roll B to rotate by one revolution on the rollers (29) thereby drawing the wrapping paper about the roll, the wrapping paper then being cut and taped at 75 to the part thereof originally taped to the roll, and the chuck and motor are then returned to their original positions. The probe 47 is then moved into engagement with the core of the roll by movement of the carriage 40 and adjustment of the frame 46 on the guides 45. The probe 47, carrying the roll B, is retracted to a position over a pallet (67) on a conveyer (66), Fig. 1 (not shown), and the probe 47 is rotated by means of a ram 54 to a vertical position so that the weight of the roll is recorded on a weighing scale 50 connected to the probe 47, the roll then being deposited on the pallet (67). In a modification, Fig. 5 (not shown), the motor (94) and chuck (95) which cause rotation of the roll during wrapping thereof are mounted on a vertically movable frame (92) which is mounted on a carriage (86) disposed on the I-beams (35) while in a further modification, Fig. 6 (not shown), the motor and chuck are disposed on the side of the runway opposite to that on which the probe is disposed.
Patent GB-1450407-A (GB)
Title: Apparatus for separating solid material from a liqudd/solid mixture method of reducing disturbance in the exhaust from a re coilless launcher
IPC: B01D21/28
Filed: 1973-12-21
Abstract: 1450407 Settling apparatus MIURA ENG INTERNATIONAL CO Ltd 21 Dec 1973 [28 Dec 1972] 59348/73 Heading B1D Apparatus for separating a liquid-solid mixture comprises a settling tank 1 with an inlet 2 and liquid outlet 3 on oposite sides, an array of inclined, parallel plates 6 extending in the direction of liquid flow from inlet to outlet and a sump beneath plates 6 which has a solids outlet 4 and may be divided by plates (7) extending at right angles to plates 6. Outlet 4 may have a discharge valve or screw. Plates 6 and (7) may be connected to external vibrators 12. Figs. 2, 4 and 5 (not shown) illustrate. various modes of vibrating plates 6. Plates 6 and 7 may be joined to vibrate as a single unit. Baffle 5 adjacent inlet 1 acts as an overflow and possibly as an underflow to distribute mixture between plates 6. A plurality of tanks 1 may be connected in series.
Patent GB-1370909-A (GB)
Title: Limited radiation communication system
IPC: H04H20/55
Filed: 1971-12-21
Abstract: 1370909 Radio signalling; inductive signalling THOMSON-CSF 21 Dec 1971 [23 Dec 1970 9 April 1971] 59490/71 Headings H4L and H4U A system is provided for communicating between fixed and mobile stations via a transmission line or waveguide arranged to provide a limited amount of radiation, e.g. for informing the driver of a road vehicle of traffic conditions. As shown in Fig. 2, the fixed station transmitter 27, which transmits on a frequency F1, is coupled via transformer 80 to the radiating coaxial transmission line 20, which via a transformer 82 is terminated by a resistor 10 at its remote end. The messages are transmitted by a microphone 25. At the remote end of the line 20 the outer conductor 90 is connected to earth via a circuit 94 forming a band stop filter at the frequency F V  used by the vehicle transmitter and at the other end is similarly coupled via circuit 93, tuned to frequency F V , to the fixed station receiver. The terminating resistor 10 may be mismatched to compensate for interfering metal zones adjacent the transmission line. In a modification, Fig. 9, the coaxial cable is divided into two sections 20, 21 separated by transformers 82, 83 coupled via amplifier 28 to make up for power losses in the cable. A transmitter 43 operating on carrier frequency F1 is provided with an input signal from microphone 25, which may be recorded on an endless tape at 26 for repetition, and is coupled at 45 to the transmission line. Additional information may be transmitted from microphone 40 via transmitter 44 on frequency F3. The line is terminated as in Fig. 2, and similarly coupled to earth via circuit 88 tuned to frequency F V . The outer conductors of the two sections of transmission line are coupled by bandpass filters 84, 86 tuned to F V , and amplifier 85. The received signal is supplied to a conventional receiver 31 to 34 which feeds a loud-speaker 35. A switch 89 enables the system to be connected to a telecommunications network 891. Two or more different types of information may be transmitted on different carriers or subcarriers. In order to advise the driver that more than one transmission is taking place a low-frequency tone is superimposed on the transmitted signals, which is detected at the receiver to operate an indicator. The A.F. stages of a conventional car radio may be used to amplify the signals received from the transmission line with manual or automatic means for switching over from the normal broadcast receiver, the switch having a central position in which the two signals are superimposed.
Patent GB-1273190-A (GB)
Title: Control of the amplification of a controller which controls a plant
IPC: H02P29/00
Filed: 1969-12-08
Abstract: 1,273,190. Electric retroactive adaptive control systems. SIEMENS A.G. Dec. 8, 1969 [Dec. 20, 1968], No. 59873/69. Heading G3R. In an optimum automatic control system wherein the amplification of a controller R, Fig. 1, which controls a plant S, must bear a predetermined ratio to the momentary amplification of the plant, disturbing influences K 1  K 2  K 3  (e.g. temperature fluctuations) which act in a multiplicative sense to vary the plant amplification, are compensated by exerting a compensating influence on the controller. In addition disturbing influences L 1  L 2  L 3  such as load fluctuations which act in an additive sense are prevented by a differentiator 4 from having any effect on the amplification of the controller. The system includes a model of the plant to be controlled. In Fig. 1, an output signal variable Y from the controller R controls the plant S. A signal X proportional to a controlled condition is fed back and compared with a desired value Wand the difference value is applied to an amplifier 10 of the controller R. It is assumed that the plant has two time-constant members 2, 3 and a deadtime member 1 and that no integrating member is present. The controlled condition signal X is also applied to the differentiator 4 the output X d  of which is applied to input 5 of a quotient former 6. The control signal Y is differentiated at 7 and the output of 7 is fed to a simulator M which is a complete model of the plant and differs only in that it is not acted upon by any disturbing influences and has constant amplification. The derivitive actions of 4 and 7 are of like values and first order and keep the signals X d  and X m  which are in phase, free from additive disturbances. The signal X m  is also fed to the quotient former and a resulting signal proportional to Xd/Xm is fed back to the controller so that the quantity K inversely proportionally influences the amplification of R. Any variation of K during operation or any variation of the effective plant amplification is exactly compensated for by an opposite variation of controller amplification. Thus the control loop remains continuously optimized. In an alternative arrangement, Fig. 2 (not shown) wherein the plant contains an integrating member (e.g. a mechanical flywheel mass the plant being a D.C. motor fed by a converter, also the dead time member 1 represents the random delay time of the converters and the time constant member 2 is the armature circuit of the motor), the additive disturbances are eliminated by 2nd order differentiation both in the plant simulator loop and in the controlled condition X link to the quotient former 6. The quotient former produces an output quantity 1/K, i.e. inversely proportional to multiplicative disturbances, and which is fed back to a multiplier (16) in place of the divider 11 of Fig. 1 Figs. 6 and 7 (not shown) illustrates in more detail alternative forms of the quotient former of Fig. 1.