baber/WOPTO huggingface dataset:
Patent GB-825385-A (GB)
Title: Improvements in the production of cyclo-octatetraene
IPC: C07C2/48
Filed: 1957-12-31
Abstract: <PICT:0825385/IV (b)/1> Cyclo-octatetraene is prepared by the cyclizing polymerization of acetylene in the liquid phase in the presence of nickel compounds at elevated temperature and pressure in a process which consists in saturating a reaction solution at a temperature of - 10 DEG  to +40 DEG  C., with acetylene under such a pressure that the concentration of the dissolved acetylene is below the ignition concentration, bringing the saturated solution into a second vessel, the heated part of which contains only liquid under a pressure greater than the saturation pressure of the acetylene at the reaction temperature and then decompressing the solution.  In a preferred embodiment the saturation of the reaction solution is carried out in the vessel a.  The solvent may be tetrahydrofurane and/or benzene.  The catalyst may also be added at this stage and may be a complex of nickel with acetyl acetone or acetic acid ester or nickel cyanide or thiocyanate used in amounts of 0.5-30 grams per litre of solvent.  The saturation may be carried out under a gas cushion containing an inert gas, e.g. nitrogen, in which case nitrogen and acetylene are passed in continuously and waste gas discharged through pipe i.  Preferably the gas phase contains at least 80% by volume of nitrogen. Acetylene may be used alone, however, at lower pressures. The acetylene concentration in the solution may be 20-170 normal mls. of gaseous acetylene per ml. of liquid; amounts of more than 200 normal mls. are dangerous.  The saturated solution is passed by the pump b which is cooled to prevent degasification to reaction vessel c maintained at 80-140 DEG  C. where the reaction takes place; pressures of 10-200 atmospheres are necessary to prevent degasification.  This pressure is maintained by a gas cushion of nitrogen in vessel e.  The reaction solution is cooled in cooler d and decompressed, part being removed to vessel h for recovery of cyclo-octatetraene, and part returned to the saturator together with fresh solvent and catalyst.
Patent GB-875794-A (GB)
Title: Improvements relating to furnace charging and fluorine recovery in the production ofaluminium by melt-electrolysis
IPC: C25C3/14
Filed: 1958-12-15
Abstract: 875,794. Producing aluminium by electrolysis. ELEKTROKEMISK A.S. Dec. 15, 1958 [Dec. 19, 1957], No. 40426/58. Class 41. A furnace for producing aluminium by electrolysis from a solution of alumina in molten cryolite in the furnace bath 9 has a hopper 1 for a charge 2 of alumina, means for collecting gases from the furnace and passing them through a burner, and means for passing the hot combustion gases from the burner through the charge 2 in the hopper 1 prior to introducing the charge 2 into the bath 9 so that the charge 2 is preheated and takes up fluorine constituents, e.g. by adsorption, from the gases for return to the furnace. The combustion gases pass by a pipe 3 through a slotted or perforated wall 5 of the hopper 1, and a branch pipe 11 may be provided to lead gases to the hopper 1 via a feed pipe 6 for the alumina. Combustion gases and/or compressed air are led through a pipe 13 which communicates with a central storage bin or with the hopper of the preceding furnace to fluidize and transport the charge to the hopper 1. A dry cyclone separator may be located upstream of the burner to remove dust from the gases.
Patent GB-1479503-A (GB)
Title: Magnetic holding means for an electric switching device
IPC: H01H50/20
Filed: 1974-09-18
Abstract: 1479503 Electromagnetic polarized relays WESTINGHOUSE ELECTRIC CORP 18 Sept 1974 [5 Oct 1973] 40734/74 Heading H1N A magnetically held switch has a magnetizable housing 14, an armature core 12 and permanent magnets 16 arranged so that the housing, armature and permanent magnet or magnets form a flux path which retains the cone armature 12 in engagement with the housing until a coil 18 is energized to oppose the permanent magnet flux. The armature moves to the position shown when assembly 50 is operated by electromechanical means not shown. The cone 12 has an axial threaded opening 32 and an externally threaded contact operating member 28 engaged therein.
Patent GB-1144367-A (GB)
Title: Deceleration responsive electrical switching device
Inventor: UTTON NORMAN
IPC: B60T8/171
Filed: 1966-09-13
Abstract: 1,144,367. Fluid pressure brakes; valves. AUTOMOTIVE PRODUCTS CO. Ltd. 3 Oct., 1967 [13 Sept., 1966], No. 40829/66. Headings F2F and F2V. [Also in Division H1] A fluid pressure braking system has a fluid pressure master cylinder 16 connected by a conduit 15 to a valve device 14, in turn connected by conduits 13 to pressure motor cylinders 12 for applying the vehicle brakes 11. A propeller shaft 24 drives a belt 23 on a rim 27 of a deceleration responsive switch 22 (see Division H1) which when the vehicle wheels reach a predetermined value close magnetic contacts 21 to energize an electromagnet 18 which moves a shaft 48 to disconnect a passage 43 of conduit 15 from a passage 47 of conduit 13 and then connect the latter to an expansion chamber 44 having a spring-biased piston 45. A non-return valve 58 in a passage 57 permits flow of fluid from the chamber 44 to the valve chamber 39 and an additional passage 59 is provided with a bleed screw 61 allowing both the valve and expansion chambers 39, 44 to be " bled " of trapped air. With a braking system of the liquid pressure continuous flow type or air pressure type, the liquid or air escaping from the motor cylinders may pass to a low pressure reservoir or to the atmosphere. Separate switching devices, each driven by one wheel, may control separate valves. The armature 51 of the electromagnet 18 is on the valve shaft 48 which is biased by a spring 52. A collar 55 on the shaft 48 acts as an abutment for a spring 54 urging a member 53 to close the opening 42. When the shaft 48 is moved upward a valve member 49 closes an inlet opening 41 and during subsequent compression of a " wavy washer " spring 50, the shoulder 56 of the shaft 48 engages the member 53 to lift it off the opening 42.
Patent GB-1018610-A (GB)
Title: Tuner device
IPC: H03D5/00
Filed: 1964-10-07
Abstract: 1,018,610. Radio receiving apparatus. MOTOROLA Inc. Oct. 7, 1964 [Oct. 28, 1963], No. 40913/64. Heading H3Q. In a mechanical push-button tuner of the type comprising a number of slide members 42, each carrying a presettable cam 42a engaging a pair of treadle bars 43 which rotate the tuning mechanism to selected positions, each pushbutton 41 carries on its under side a pivoted lever 55 capable of presetting to two positions. Pins 64 on these levers engage cam surfaces 65 formed on a transversely operating slide switch 52 whereby the receiver may be switched to A.M. or F.M. by operation of any push-button. The slide switch may also be operated manually by means of a projection carrying knob 53, the tuner being capable of manual adjustment by means of tuning spindle 31, friction drive mechanism 32, 33 and gears 34, 35.
Patent GB-1064938-A (GB)
Title: Liquid phase hydrocarbon oligomerization process
IPC: C07C2/24
Filed: 1964-10-07
Abstract: In oligomerizing C2-C7 olefins in the presence of an alkali metal-containing catalyst the feed is dried to a water content below 10 p.p.m., the catalyst contains sodium, potassium, rubidium or caesium and has a particle size below 50 microns, reaction is effected at 115-160 DEG  C. under a pressure less than the liquefaction pressure of the monomer in an inert diluent preferably boiling at least 10 DEG  C. higher than the product at the reaction pressure e.g. a saturated hydrocarbon end product is recovered from vapours which are removed from above the diluent. The feed is preferably dried, with a 5 <\>rA molecular sieve or with liquid alkali metal or alcium hydride and is preferably pretreated with aqueous caustic followed by aqueous dithanolamine.  The reaction zone is preferably maintained in an ebullient condition. The dimerization of propylene is exemplified.
Patent GB-1326763-A (GB)
Title: Automatic control device for controlling toner concentration  in a liquid developer bath in an electrostatic copy machine
IPC: G03G15/11
Filed: 1970-08-26
Abstract: 1326763 Electro-photographic developing apparatus; automatic control of concentration IWATSU ELECTRIC CO Ltd 26 Aug 1970 [15 Nov 1969] 40986/70 Headings G2H G3R A pump 2 pumps liquid developer from a tank 1 into a bath 3 for developing latent images; through a detector 4 where toner concentration is measured; and through a supply mechanism 6 which is controlled by detector 4 to add toner from a source 7 to the developer. In detector 4 the developer flows down a guide 11 which forms a thin flow of developer. The opacity of this flow is measured by a photo-cell 13 and compared with a standard value indicated by a filter 18 and measured by a photo-cell 19. Any difference between the outputs of the photo-cells is applied by a circuit Figs. 7, 8A, 8B (not shown) to a solenoid (23) which controls an output valve in toner source 7. In Fig.8C (not shown), a source of carrier liquid (54) as well as a toner source (53) is controlled by photo-cells 13, 19. In Figs. 9, 10 (not shown), a float (47) measures the liquid level in tank 1. When the lead falls below a predetermined value, a warning lamp (49) is illuminated and the toner supply solenoid (23) is disabled. The value at which toner concentration is to be maintained may be adjusted by replacing filter 18 or by adjusting a resistor (36) Figs. 8A, B (not shown).
Patent GB-1474861-A (GB)
Title: Mechanical seal having floating seal ring anchored to gland ring
IPC: F16J15/44
Filed: 1975-10-07
Abstract: 1474861 Shaft seals DURAMETALLIC CORP 7 Oct 1975 [7 Oct 1974] 41091/75 Heading F2B In an end face seal construction, a radially floating bushing seal 54 is used to back-up the end face seal 17, 42 so that, in the event of failure of the latter, the resulting leakage along the shaft 13 is controlled by the bushing seal 54. The seal 54, which may be of carbon, has a secondary sealing interface 53, 56 under axial pressure from springs 58 and the pressure of treating liquid or coolant in space 55.
Patent GB-1443676-A (GB)
Title: Power-assisted steering for a motor vehicle
IPC: B62D6/02
Filed: 1974-09-20
Abstract: 1443676 Power-assisted steering SOC ANON DBA 20 Sept 1974 [9 Oct 1973] 41095/74 Heading B7H A power-assisted steering system comprises an actuator 22 with two pressure chambers 28, 30 separated by a piston 20, a pressure fluid distributing valve 33 permitting control of the pressure in at least one of the chambers in accordance with the movement, by an operator, of a control member coupled with steering column 10, 86 in either of two opposite directions from a central, idle position, means capable of creating a return force urging the control member into its central position, and a casing 46 slidably receiving a reaction piston 60 and two plungers 62, 64, the piston and plungers defining a closed compartment 68 filled with incompressible fluid. The reaction piston is biased, by the return means which as illustrated comprises accumulator 31, but which may additionally or alternatively comprise springs located in cavity 48, in a direction to reduce the volume of the fluid in the compartment, and that bias is opposed by the pressure generated in the closed compartment by the pressures prevailing in the actuator chambers acting directly or indirectly on the outer ends of the plungers. Accordingly a smaller return force F will be provided on the steering column under low-speed turning (e.g. parking) and a higher return force will be provided under conditions in which the wheels provide less resistance to turning, e.g. at highspeed or on icy roads. As illustrated, turning of the steering column causes fluid under pressure to pass to one side of piston 20 to assist rack-and-pinion mechanism and simultaneously fluid at pressure P t  (where P t  is the pressure of fluid at the one side of the piston 20) passes to casing 46 to force the appropriate plunger 62 or 64 away from its stop to pressurize the incompressible fluid in compartment 68. Hence, the force F tending to return the steering column to the full line position (i.e. central, idle position) is given by the equation F=P Î S-P c  Î (S-s), where P is pressure in accumulator 31, S is area of piston 60, s is area of tappet 76, and Pc is pressure in compartment 68. Since P t =P c , F=P Î SP t  + (S-s). Accordingly the smaller the pressure (P t ) required to steer the wheels the greater the force F. The Specification also discloses embodiments in which the reaction devices are modified to cater for actuator pistons each having two different, opposed effective areas.
Patent GB-916273-A (GB)
Title: A mechanical device for producing apparently irregular movement
IPC: F16H37/12
Filed: 1960-11-30
Abstract: 916,273. Converting rotary to oscillating motion. PELHAM, R. H. Nov. 8, 1961 [Nov. 30, 1960; Jan. 9, 1961], Nos. 41198/60 and 870/61. Class 80 (1). In mechanism for converting rotary motion into oscillating motion, two wheels of different diameters rotate about eccentric pivots, the first wheel driving the second wheel which is rotatably mounted on a lever to which the oscillatory motion is imparted. Apparatus for producing a periodic movement of one frequency modulated at a lower frequency comprises a wheel 11 rotated about an eccentric pivot 12 by a motor 13 and reduction gearing 14. The wheel 11 drives a second wheel 15 through a U-belt 16, the wheel 15 being pivoted eccentrically at 17 on a lever 18 which imparts the oscillating motion to a puppet through an elastic cord 23. The lever 18 is fulcrumed at 19 and loaded by a spring 22 to maintain belt tension. In a modification, eccentrically-mounted shrouded tooth wheels or friction wheels are used in place of the belt-driven wheels.
Patent GB-1127929-A (GB)
Title: Phenylpyrrole carboxylic acid derivatives and process for the preparation thereof
IPC: C07D207/34
Filed: 1965-09-30
Abstract: 1,127,929. Pyrroles. FUJISAWA PHARMACEUTICAL CO. Ltd. 30 Sept., 1965 [24 Sept., 1964; 8 April, 1965], No. 41625/65. Heading C2C. Compounds of the formula (wherein X is H, halogen, NO 2  or C 1-6  alkoxy; Y is halogen, NO 2  or C 1-6  alkoxy; R<SP>3</SP> is H or halogen; R<SP>1</SP> and R<SP>2</SP> are H, CO 2 H or esterified CO 2 H; and one of R<SP>1</SP> and R<SP>2</SP> must be CO 2 H or esterified CO 2 H), which are novel when R<SP>2</SP> is not esterified CO 2 H, are prepared by solvolysis of corresponding pyrroles containing trihalomethyl and/or esterified carboxyl groups in the 2- and/or 5-positions. Solvolysis may be effected with water, an aliphatic carboxylic acid or an aliphatic or aromatic alcohol, and, when water or an alcohol is used, is preferably effected in the presence of a base, or, with water, an acid. Depending on the conditions, a trihalomethyl group may be converted to a free or esterified carboxyl group, and an esterified carboxyl group may be hydrolysed. The starting materials may also be mixed with corresponding dihalomethyl compounds, which are also hydrolysed if an oxidizing agent is also present.
Patent GB-1406101-A (GB)
Title: Drafting system
IPC: D01H5/64
Filed: 1972-09-07
Abstract: 1406101 Clearing rollers DEERING MILLIKEN RESEARCH CORP 7 Sept 1972 41636/ 72 Heading D1D A scraper for clearing lint etc from rollers comprises a pair notched (at 60) pivotally supported arms 48 each carrying scrapers 28 in U-shaped supports by means of pins 52. Preferably the notched parts of arms 48 are selectively displaceable along arms so as to correspond to different roll settings. In operation, a cam 70 on one of the roller shafts intermittently pivots the scrapers upwardly thereby allowing collected lint etc to fall away. The scrapers 28 are contsructed so that an upward movement they rotate under gravity about pins 52 to present a new scraping edge to the rollers as they are swung downwardly into the operating position again.
Patent GB-1224249-A (GB)
Title: A new or improved reciprocating pump for liquids
Inventor: HALES ERIC CHARLES
IPC: F04B9/06
Filed: 1968-08-31
Abstract: 1,224,249. Reciprocating pumps. GIRLING Ltd. Aug.18, 1969 [Aug.31, 1968], No.41732/68 Addition to 1, 221, 827. Heading F1A. A pump which stalls at a predetermined output pressure comprises a bucket piston 35 moved on its suction stroke by cams or eccentrics 21, 22 acting on a hollow stirrup 28 fixed to the piston, and moved on its delivery stroke by spring 34. Liquid enters pump housing chamber 13 via inlet 15 and is drawn into cylinder 24 via bucket valve 32 on the suction stroke. Delivery is effected via a passage with a check valve at the left-hand end of cylinder 24, Fig. 2 (not shown). Cylinder 24 is formed in a spigot 23 extending from the left-hand end of the pump housing. Drive shaft 17 is supported by bearings 18, 19.
Patent GB-1101328-A (GB)
Title: Improvements relating to quick release tube couplings
Inventor: WADE JOHN PERIN
IPC: F16L37/42
Filed: 1965-10-01
Abstract: 1,101,328. Pipe couplings. WADE COUPLINGS Ltd. 14 Sept., 1966 [1 Oct., 1965], No. 41800/65. Heading F2G. An 0-ring 19 held between a nut 2 and a valve body 1 is engaged by a spigot 22 which opens a valve 10 having in a groove 16 thereof an 0-ring 15 which when the valve is closed under the action of a spring 13, engages a seat 6, the effectiveness of the seal in this latter position of the valve being increased by fluid pressure acting on the end of the valve. The body 1 carries in an internal annular groove 21 therein an 0-ring 20 which when the spigot has been inserted into the socket, formed by the screwed-together body and nut, engages in a groove 29 in the spigot to hold the latter in the socket.
Patent GB-1525983-A (GB)
Title: Prefabricated dome structure
IPC: E04B1/32
Filed: 1976-08-17
Abstract: 1525983 Domed buildings ENGINEERING & GLASSFIBRE DEVELOPMENTS Ltd 17 Aug 1976 [14 Oct 1975] 41938/75 Heading E1A A dome shaped building 3 comprises a plurality of annular groups A, B, C, of moulded reinforced plastics panels 10, 20, 50 each of which has four flanged side edges by which it is secured to adjacent panels, the annular flanges extending around the dome being adapted to ensure that moisture cannot accumulate thereon. The connection may be by means of bolts and the panels may be of skins of glass fibre reinforced plastics and filled with polyurethane foam. Apertures 40 may be provided in the vertical flanges for, securement of scaffolding and aligned apertures 42, 43 may be provided in the other flanges for drainage.
Patent GB-1025237-A (GB)
Title: Oxymethylene polymer coatings
IPC: B05D1/24
Filed: 1962-11-07
Abstract: Articles are coated with an oxymethylene polymer by exposing the article to a fluidized bed of the polymer in a finely-divided condition, the article being at a temperature above the melting point of the polymer.  The articles are preferably metallic but ceramics and glass are also specified.  The surface to be coated must be free of grease, oil, corrosive or volatile products e.g. by cleaning with the usual solvents and may be roughened to increase adhesion.  The article may be heated during immersion by interior circulation of a heating fluid or, if it is hollow by retention of heated solid or liquid within it, but is usually preheated.  The coated article may be reheated to a temperature sufficiently above the melting point of the polymer to fuse the surface particles of the coating.  The polymer may be of recurring oxymethylene and higher oxyalkylene limits and may contain antioxidants, scission inhibitors, plasticizers, fillers, pigments and a-V stabilizers.  An example of coating a fan assembly is given.
Patent GB-1021671-A (GB)
Title: Improvements in or relating to sawtooth current wave generators
Inventor: MARCH ROY COLLINS
IPC: H03K4/90
Filed: 1961-11-27
Abstract: 1,021,671. Saw-tooth circuits. MARCONI CO. Ltd. July 31, 1962 [Nov. 27, 1961], No. 42303/61. Headings H3P and H3T. A saw-tooth current generator comprises a capacitor C, charged via the primary PT1 of transformer T1 and discharged via the primary PT2 of T2 under control of a valve, transistor or S.C.R. S, deflection coils at terminals O being coupled to the two windings. The resonance period of C with PT1 is many times the duration of the forward stroke, hence the voltage rise is substantially linear. C discharges via PT2 at the end of each sweep when S is pulsed, the resonance period being four times the flyback period, hence a quarter-cycle oscillation is produced, damped by diode D. K is charged during each flyback, providing a linearifying waveform across 2ST2 and a supply boosting voltage. The linearity is adjustable by R1 whilst K can be selected to compensate for cathode-ray tube geometry. An overcurrent relay RL protects the S.C.R.
Patent GB-1255625-A (GB)
Title: Sampling of flowing liquids
Inventor: THOMPSON THOMAS MICHAEL
IPC: G01N1/20
Filed: 1968-01-17
Abstract: 1,255,625. Sampling liquids. COTTON SILK & MAN-MADE FIBRES RESEARCH ASSOCIATION. 17 Jan., 1969 [17 Jan., 1968], No. 42339/70. Divided out of 1,255,624. Heading B8N. [Also in Division G1] The rate of flow of a liquid is determined by measuring the depth of the liquid passing over a weir C, using a float A attached to the slider of a potentiometer 1 and modifying the signal in accordance with the known relationship between depth and rate of flow for a weir of the given shape. The rate of flow signal controls pump 3 to feed a tipping device 4 at a proportionate rate, predetermined quantities in device 4 being fed into a mixer 5 and collected periodically in bottles D assembled on a turntable 6.
Patent GB-1382741-A (GB)
Title: Machine for producing foams or homogeneous materials
IPC: B29C39/02
Filed: 1972-09-13
Abstract: 1382741 Proportioning mixture constiuents BAYER AG 13 Sept 1972 [15 Sept 19711 42439/72 Heading B1C [Also in Division Fl] Apparatus for producing a homogeneous material or a foam from at least two fluent components comprises containers 1, 6 for the components A, B which are metered by adjustable stroke radial piston pumps 3, 7 (see Figs. 2 and 3, not shown, and Division F1), to a mixer 5. An additive Z may be mixed with component A or B or fed by a pump 10 into the supply lines upstream or downstream of pump 3 or 7, or into the mixer 5. The apparatus may be used for making polyurethane foams.
Patent GB-1033895-A (GB)
Title: Improvements in or relating to static inverters
Inventor: CROUCHMAN ERNEST LESLIE
IPC: H02M7/525
Filed: 1962-11-10
Abstract: 1,033,895. Automatic voltage control. SMITHS INDUSTRIES Ltd. Nov.8, 1963 [Nov.10, 1962], No. 42552/62. Heading G3R. [Also in Division H2] The input to a static inverter includes seriesconnected means generating a regulating voltage which varies in magnitude and sense in dependence upon output voltage variations, so that the alternating output voltage of the inverter is maintained constant. As shown, a static inverter comprises silicon-controlled rectifiers SCR1, SCR2, diodes D1, D2, resistors RS1, RS2, a capacitor C1, a choke L1, and a transformer T1 the secondary winding of which supplies a load RL with alternating current derived from a D.C. source by applying gate pulses from a control circuit to the controlled rectifiers. In series with the D.C . input to the inverter is a circuit, constituted by further controlled rectifiers SCR3, SCR4 and a centre-tapped third winding W3 of the transformer T1,for generating the regulating voltage which is smoothed by a choke L2 and a capacitor C2. The control circuit for the controlled rectifiers SCR1 and SCR2 also supplies gate pulses to the controlled rectifiers SCR3 and SCR4 at a variable time during every cycle; the means to vary the time interval may be controlled in dependence upon output voltage variations so that the resulting regulating voltage is of a sense to maintain the output voltage constant. A suitable control circuit is described with reference to Fig.4 (not shown). An embodiment employing transistors in the regulating voltage circuit, and including a start circuit, a stop circuit and an overload protection circuit is also described (Figs.7 and 8, not shown).