baber/WOPTO huggingface dataset:
Patent GB-1526294-A (GB)
Title: Process for the preparation and the simultaneous stabilization of polyoxymethylene
IPC: C08G2/08
Filed: 1975-12-03
Abstract: 1526294 Preparation of polyoxymethylenes SOC ITALIANA RESINE SIR SpA 3 Dec 1975 [20 Dec 1974] 49681/75 Heading C3P Polyoxymethylene is prepared and simultaneously stabilized by feeding gaseous anhydrous monomeric formaldehyde into an organic reaction medium which is liquid under the reaction conditions and non-reactive towards the other constituents of the reaction medium and a non-solvent for polyoxymethylene and which contains, dispersed therein, a catalyst/ stabilizer comprising a polylactam having a terminal ionic couple and containing the recurring unit obtainable from one or more lactams of formula wherein PM is a C 3-13  polymethylene chain, unsubstituted, or substituted by one or more alkyl, aryl, alkylaryl, or cycloalkyl groups, said catalyst/stabilizer being used in an amount of between 0À1 and 5 wt. per cent (based on monomeric formaldehyde), and the polymerization being carried out in the presence of a chain transfer agent. Suitable lactams for making the catalyst are #-caprolactam, α-pyrrolidone, #- lauryllactam, α-piperidone and #-enantiolactam. Suitable organic media are ethers, hydrocarbons and chlorinated hydrocarbons and suitable chain transfer agents carboxylic acids and anhydrides, or at least C 2  alkanol, a cycloaliphatic or aromatic alcohol, amides and imides. The polylactams are prepared by anionic polymerization, hence the pressure of a terminal ionic couple.
Patent GB-1522599-A (GB)
Title: Centre channel derivation for stereophonic cinema sound
IPC: H04H20/88
Filed: 1974-11-16
Abstract: 1522599 Stereophonic sound reproduction DOLBY LABORATORIES Inc 30 Oct 1975 [16 Nov 1974] 49724/74 Heading H4R The gain of a centre channel signal derived from left and right signal channels including delays is enhanced relative to the left and right signals when they show substantial correlation. A speech signal, intended for reproduction at the centre stage of an auditorium has high correlation in the left and right channels and leads to the centre loudspeaker level being relatively increased to harden the central image. The delays ensure the centre channel signal is heard first to enhance this effect. The gain controls and/or gain controlling stage may be restricted to the speech band by filters. In Fig. 5 the larger of the rectified left and right signals is compared 59 with a signal representing phase correlation 55 between L and R to derive a control signal which, if above a threshold 60, is used to adjust the gains of amplifiers 30, 31 Fig. 3. For centre speech signals all channel gains reduce to 1 whilst for uncorrelated signals the left and right channel gains are 0À747 and centre channel gain is 1À340. Sum and difference comparison techniques may be used and the gain change instantaneous or gradual.
Patent GB-1129309-A (GB)
Title: Dye-stuff
Inventor: POPOVICI NICULAE
IPC: C09B43/28
Filed: 1965-11-23
Abstract: 1,129,309. Stilbene-azo dye. RUMANIA, MINISTER OF CHEMICAL INDUSTRY. 23 Nov., 1965, No. 49730/65. Heading C4P. The dye of formula is prepared by reacting a compound of formula with an epihalohydrin particularly epichlorohydrin, preferably under reflux in alkaline aqueous media using an excess of epihalohydrin. The dye is yellow and used for cellulose and animal fibres.
Patent GB-1415120-A (GB)
Title: Manufacture of cream cheeses
IPC: B65D77/20
Filed: 1973-10-25
Abstract: 1415120 Cream cheese B PAMPAGNIN 25 Oct 1973 49751/73 Heading A2B [Also in Division B8] Curds are introduced into perforated baskets 2, of plastics material, whey is filtered into a container 1, having a generally parallelipipedic shape, a plurality of the filled baskets are placed side by side in the container, and the container is closed by a single member 3, as by welding a sheet of material to a rim 4 and shoulder 5, of the container.
Patent GB-1495260-A (GB)
Title: Propeller
IPC: B64C11/08
Filed: 1974-11-19
Abstract: 1495260 Propellers MABUCHI MOTOR KK 19 Nov 1974 [21 Nov 1973] 50133/74 Heading A6S A propeller for a model appliance, e.g. an electrically-powered model aircraft, is formed with a bulbous portion 3 at the end of each of the blades 2 to reduce accident risk, the portion extending beyond the blade surfaces and lying substantially within the tip-circle.
Patent GB-1276240-A (GB)
Title: Snap action switches
IPC: H01H23/16
Filed: 1970-10-22
Abstract: 1276240 Snap action switches INTERNATIONAL STANDARD ELECTRIC CORP 22 Oct 1970 [27 Oct 1969] 50192/70 Heading H1N A snap-action switch comprises an actuating member 1 having resilient arms 2 engaging an abutment 3 on a slide 4; contacts 14 operated by the slide; and co-operating cam members 7, 15, 8 which act to restrain movement of the slide 4 until the force due to the resilient arms reaches a predetermined level. The handle 1, slide 4 and cam 16 may be of resilient plastics material. Alternatively slide 4 may be metal, only a part 13 transmitting motion to the contacts being insulating. A stop member 12 limits movement of the slide 4. A second group of contacts 14 may be mounted on the other side of cam 16.
Patent GB-1453724-A (GB)
Title: Electrical control circuit providing a pulse-width modulated output signal
IPC: G05B11/16
Filed: 1973-10-29
Abstract: 1453724 Automatic control of temperature KLEIN SCHANZLIN & BECKER AG 29 Oct 1973 [31 Oct 1972] 50196/73 Heading G3R A two-step control circuit provides a constant amplitude pulse width modulated output signal the mark/space ratio of which varies as a function of an input variable (e.g. temperature) to be controlled, and includes an amplifier 9 having positive feedback (via R5, C8) and negative feedback one or the other of which predominates alternately to cause the amplifier to change states repeatedly and provide the constant amplitude pulse train output. In a temperature control arrangement the amplifier output controls a relay 10 connected to heating or cooling apparatus (not shown). An N.T.C. resistance sensor 1, a desired temperature set-point resistor 2 and resistors 3, 4a, 4b form a bridge circuit the output of which at points a, b is a function of the temperature error and is applied to the inverting and non-inverting inputs respectively of the amplifier to control the mark/space ratio of the amplifier output. When the bridge is balanced the mark/space ratio is 1.
Patent GB-1131310-A (GB)
Title: Safety device for arresting workers at height, in the event of a fall
Inventor: SHAND THOMAS GEORGE
IPC: A62B35/04
Filed: 1965-11-25
Abstract: 1,131,310. Frame rollers. BARROW HEPBURN & GALE Ltd. 16 Feb., 1967 [25 Nov., 1965], No. 50199/65. Heading B8B. [Also in Divisions A5 and F2] A safety device for arresting a person falling from a height comprises a casing 1 which can be connected by an eyelet to a fixed anchorage and through which a safety line supporting the person concerned can be drawn over a centrifugal clutch mechanism which when rotated above a certain speed applies a brake to the safety line. The clutch mechanism 3 comprises a flanged disc 12 rotatably mounted on a shaft 10 and defining a central cavity in which a second disc 13 is freely rotatable with respect to the disc 12. An arcuate weight 16 is pivoted near one end of the diametral wall of the disc 12 and under the action of centrifugal force arising from rotation of the disc 12 by the safety line (not shown) swings outwardly against the opposing force of a spring (not shown) to abut one of the inwardly extending bosses 14, 14a provided on the disc 13. The disc 13 is immediately rotated and one of the externally mounted studs 15, 15a abuts the head of a brake actuating rod 17. The rod 17 displaces a ball cage 7 and the balls 8 run along the conical face of a wedge 18 to move radially inwards and grip the line.
Patent GB-1337058-A (GB)
Title: Adjustable chairs
IPC: A47C1/032
Filed: 1971-10-29
Abstract: 1337058 Reclining chairs J E EKORNES FABRIKKER A S 29 Oct 1971 [29 Oct 1970] 50658/71 Heading A4J In a chair in which the angle between the backrest and seat is adjustible by change in disposition of the weight of the user, the backrest frame 1 is pivotally connected at 3 to the seat frame 2 and at 5 to the rear of an upright support, the seat frame 2 being connected through a movable sliding shoe 6 to the front of the upright support, an adjustable wheel on the slide shoe being effective to frictionally couple the shoe to the support. In a modification Fig.2 (not shown) a stationary sliding shoe (6b) is provided on the front of the upright support below a movable shoe (6a) connecting the seat frame 2 to the support, an adjustable wheel on the stationary shoe being used to frictionally couple a tube (9) fixed to the movable shoe against movement.
Patent GB-1406473-A (GB)
Title: Telegraphic apparatus
IPC: H04L12/06
Filed: 1972-11-03
Abstract: 1406473 Telegraphy; answer back apparatus ITT CREED Ltd 3 Nov 1972 50693/72 Heading H4P An answer back unit providing determined code combinations comprises a diode matrix 2 whose input lines are enabled at least twice in sequence by a counter acting as a distributer. At rest, all input lines are held disabled by toggle 3. When a "who are you" signal WRU or "here is" button is pressed, toggle 3 is set to B state through OR 4, releasing counter 1 which is pulsed from clock 5. Toggle 7, B output enables gate 6 hence a first set of combinations are passed through output unit 8 to line. Through AND gate 9, toggle 7 is then set to A which enables gate 10 hence a further set of combinations are passed through unit 8. On the last code combination, toggle 3 is reset by a signal from a spare output on 8.
Patent GB-1526838-A (GB)
Title: Driven plates for friction clutches
IPC: F16D/
Filed: 1976-11-26
Abstract: 1526838 Mounting clutch discs on hubs AUTOMOTIVE PRODUCTS Ltd 26 Nov 1976 [10 Dec 1975] 50701/75 Heading F2U In a friction clutch driven disc assembly, an annular plate 17, staked fast on a hub member 15, has outwardly projecting portions 31 which co-operate with pins 32 riveted to a friction face carrier disc 12, thereby providing end stops for limited relative rotary motion, and helical spring members 38 are loosely located upon riveted bosses 35, the spring end tangs 39, 41 being in abutment against pins 34 carried by plate 17 and also in abutment with rollers 33 mounted on the pins 32. Disc 12 is thereby returned to a central orientation relatively to the hub plate 17, in the absence of torque. Transmission of torque causes each pin 32 to deflect an adjacent spring tang 39 or 41 through changing angles of inclination relatively to a radial line. thus causing progressively increasing resistance to further deflection. In other embodiments, the pins 32, 34 may be replaced by members of non-circular crosssection, or alternatively replaced by members shiftable radially by centrifugal action, thereby modifying the relationship between torque and angular deflection.
Patent GB-1192177-A (GB)
Title: Improvements in or relating to Apparatus for Continuously Feeding Cut Tobacco into a Cigarette-Making Machine
Inventor: LABBE FRANCIS AUGUSTE MAURICE
IPC: A24C5/39
Filed: 1966-11-15
Abstract: 1,192,177. Feeding tobacco. MOLINS MACHINE CO. Ltd. 15 Nov., 1967 [15 Nov., 1966], No. 51081/66. Heading A2C. In an apparatus for feeding tobacco to the hopper 12 of a cigarette-making machine, tobacco is continuously pneumatically supplied through a pipe 1 and a shoot 2 to a separating chamber 3 in which air is continuously drawn off by suction applied through a sieve drum 4 while the tobacco continues to move along a curved wall 5 of the chamber 3 and thence moves into a channel 7 in which it forms an air lock for the exit of the separating chamber 3. A solenoid actuated flap 15 (which may be replaced by a similarly actuated sprung roller) closes the exit end of the channel 3 during the start up of the apparatus and is opened as soon as the tobacco air lock has formed. The channel 7 comprises a stationary wall 8 and a moving wall formed by a conveyer band 8a the latter being driven via a variable speed gear 11. Detection of the level of tobacco, by a photo cell device 20 sited above carding rollers 13, 14 of the hopper 12, is used to control the speed of the gear 11. Another photo cell detector 19 is used to control the rate of feed of tobacco to the chamber 3. The width of the shoot 2 increases along its length from the pipe 1 until its equals the width of the hopper 12 at its exit into the chamber 3.
Patent GB-1168515-A (GB)
Title: Resinous Polymer Compositions and a method for Stabilizing Resinous Polymers
IPC: C08L59/02
Filed: 1967-11-10
Abstract: 1,168,515. Bis-phenol formates. SANKYO CO. Ltd. AND ASAHI KASEI KOGYO K.K. 10 Nov., 1967 [12 Nov., 1966; 15 April, 1967; 17 April, 1967], No. 51299/67. Heading C2C. [Also in Division C3] Bis-phenol formates of the general formula wherein R 1  and R 2  may be the same or different and represent hydrogen atoms, alkyl or alkoxy groups and X represents an oxygen atom, a sulphur atom or a group of the formula (wherein R 3  and R 4  may be the same or different and represent hydrogen atoms or alkyl groups or they may form a 5-, 6- or 7-membered saturated homocyclio ring) or the group of the formula are prepared by reacting a bisphenol derivative having the general formula with a Vilsmeier reagent composed of a formamide derivative and one of phosphorus oxychloride, phosphorus pentachloride, phosgene thionyl chloride and sulphonyl chloride. In an example 2,2<SP>1</SP>-dimethyl-4,4<SP>1</SP>-dihydroxy-5,5<SP>1</SP>-ditert.-butyldiphenyl sulphide is reacted with dimethyl formamide to produce 2,2<SP>1</SP>-dimethyl- 4,41 - diformyloxy - 5,5<SP>1</SP> - di - tert. - butyldiphenyl sulphide.
Patent GB-1071770-A (GB)
Title: Treatment of water
Inventor: ARDEN THOMAS VICTOR
IPC: B01J39/04
Filed: 1964-12-17
Abstract: Water containing silica is ion-exchanged with material having strong-base exchange groups in the hydroxyl form, which removes the dissolved silica, and then treated with hydrofluoric acid to combine with the colloidal silica and form silicofluoride which is removed by ion-exchange.  Demineralization and removal of carbon dioxide are optional refinements of the process.
Patent GB-1174253-A (GB)
Title: Nuclear Reactor Fuelling Arrangements
IPC: G21C19/00
Filed: 1966-11-16
Abstract: 1,174,253. Fuelling reactors. CANADIAN GENERAL ELECTRIC CO. Ltd. 16 Nov., 1966 [20 Nov., 1965 (2)], No. 51402/66. Heading G6C. A fuelling arrangement for a pressurized water-cooled reactor (not shown) includes a fuelling machine 20, Fig. 1, which may be coupled by a snout 22 at its upper end either to the lower end of a selected calandria tube 100, Fig. 5, extending downwardly from the reactor or to the lower end of a fuel receiving tube 221 extending downwardly from a fuel sorting machine 219, Fig. 7, the lower ends of the tubes 100, 221 being normally closed by ball valves 120, 224, respectively. The valve 120 when in the closed and partly open position, supports the fuel in the tube 100. Fuelling machine 20.-This comprises a flask 21 resiliently mounted on a carriage 29 in which it may be raised by hydraulic jacks 26 to couple the snout 22 either to a selected tube 100 or to the tube 221. The valves 120, 224 are operated by a motor 90 and shaft 91 on the flask and interlocks are provided (Fig. 6, not shown) to prevent opening of a valve until the flask is filled with heavy water at reactor pressure and to prevent uncoupling of the snout 22 whilst the flask is pressurized. The flask, described in detail with reference to Figs. 3, 4 (not shown), includes a magazine and a ram, this ram penetrating the ball valve 120 or 224 when open or partly open and enabling fuel to be lowered from a tube 100 or 221 into the magazine. The heavy water is circulated through pipes 53, 54 through a heat dissipator. The fuel sorting machine 219 comprises a shielded chamber 220, the fuel receiving tube 221, a fuel dispensing tube 261 and a fuel discharge tube 217. The tubes 221, 261, 217 are displaced at 120 degrees when viewed in plan so that they may be aligned with three similarly displaced chambers 231 of a magazine 230. Fuel element retaining latches 240, 241 provided respectively on the tube 221 and on one of the chambers 231 are operable by a push rod 249 having a handle 253 through a crank 248 and rods 246 pivoted to slidable actuating collars 243, 245. The magazine 230 is rotated by a handle 259 through gearing 255, 256 and when it is rotated the collar 245 is disengaged from its rod 246. The fuel discharge station 265 also includes a push-pull rod 268 for operating the latches 241 when they are at that station. A heavy water coolant supply system 295 comprises a header pipe 296, supplying a spray nozzle 297, together with a circulating pump and heat exchanger (not shown). A weight 286 coupled by a string 287 to a shaft 289 driving an indicator 292 is moved by fuel inserted into the tube 221 and thus the quantity of fuel in the tube is indicated.
Patent GB-1096946-A (GB)
Title: Ethylene/acrylic acid copolymer emulsions
IPC: C09J123/08
Filed: 1964-12-17
Abstract: Aqueous copolymer emulsions are prepared by first forming a "water-in-oil" emulsion by mixing together a random copolymer of ethylene and acrylic acid, a water-soluble base and from 5 to 25%, based on the weight of the copolymer, of water and heating the mixture to 150-200 DEG  C. while stirring, and then adding more water while stirring to form an "oil-in-water emulsion" containing up to 50% by weight of the copolymer, the particle size of which is from 0.02 to 20 microns.  The copolymer generally contains more than 50% by weight of ethylene units and, preferably, 2 to 30% by weight of acrylic acid units; it may also contain up to 20% by weight of one or more additional monomer components, e.g. vinyl or vinylidene halides, vinyl esters, unsaturated acids and esters, amides and nitriles thereof, vinyl alkyl ethers and ketones, N-vinyl compounds and cyclo-olefins.  Ethylene/vinyl acetate/acrylic acid terpolymer is given as an example of a polymer containing an additional component. The preferred water-soluble bases are ammonium hydroxide and alkali metal hydroxides, i.e. hydroxides of Li, Na, K, Rb and Cs; the base being generally used in an amount of 30 to 100 mole per cent based on the copolymerized acrylic acid content of the polymer. There may be added to the emulsions dyes, pigments, emulsifiers, epoxide compounds and methylol-containing resins (all unspecified) for coating applications etc.ALSO:Methanol and water is fed from a supply 22 to reactors 10 in a fluidized sand bed 12 maintained at a temperature of 370-375 DEG  C. and then to a silver palladium diffusion membrane 11 which allows hydrogen to pass through and along line 31 to a fuel cell supply 36.  The reactors 10 contain coprecipitated oxides of <PICT:1096946/C1/1> zinc and copper as catalyst.  The sand bed is heated by a burner 14 supplied with methanol from supply 15 and primary and secondary air from compressor 16 and fan 18 respectively. The reactant from supply 22 is recirculated through by-pass valve 29 until the valve closes when the required temperature is attained. Thermocouples 43 in the sand bed are connected to a thermostat circuit (G3R).
Patent GB-1085300-A (GB)
Title: Control device
IPC: F41G7/30
Filed: 1964-12-18
Abstract: 1,085,300. Radar. BOFORS A.B. Dec. 18, 1964 [Dec. 20, 1963], No. 51694/64. Heading H4D. [Also in Division F3] A control lever is mounted for pivotal movement from a neutral position through a solid of revolution thereabout and return spring means acts on the lever in any position of tilt thereof to urge the lever continuously toward the neutral position, the return spring means including a first member having a surface bounded by a plane circular rim, a second member having a plane seating surface for the first member, one of the members being connected to the lever for participation in pivotal movements thereof and the other member being mounted in a stationary member, and a coil spring axially and symmetrically disposed relative to the circular rim by the first member acts on one of the members in a direction normal to the plane seating surface when the lever is in its neutral position to urge the two members into a stable position relative to each other in which position the circular rim abuts along substantially its entire periphery against the plane seating surface while permitting an angular rocking movement of the first member with respect to the seating surface about any peripheral point of the rim. The lever may be utilized in the control in azimuth and elevation of a guided missile, a radar aerial, or a gun; or the position of a marker across the screen of a radar P.P.I. In one embodiment, Fig. 2, the control lever 1, shown deflected from neutral, is pivoted about a shaft 2 journalled in a gimbal 3 itself pivoted about a shaft 4 journalled in a casing 5, the lever thereby having one degree of freedom about shaft 2 and another about shaft 4. The latter rotation is followed via a gear 9, 10 by a potentiometer, and the former via gear 12, 13 by a second signal generator. Lever extension 16 terminates in a ball 17 in a socket 18 at the upper end of a rod 19 mounting a disc 20 abutting against the base 21 of a recess 22 (see also Fig. 3, not shown). A spring 23 maintains disc 20 in contact with base 21. In a modification the dimensions of the device in the longitudinal direction of the lever are reduced, Fig. 4 (not shown), a disc (27) is attached to the upper end of a rod (30) the lower end of which mounts a ball (31) displaceable in a bore (32) in the bottom of the casing of the device. In a further embodiment, Fig. 5 (not shown), further reduction of dimensions is achieved; the control lever (1) is not mounted in a gimbal but its lower end is provided with a hemi-spherical member (33) in a socket (35) the plane surface (34) of which abuts a spring-loaded disc (36). Two signal generators are controlled by semicircular yokes (39, 40) provided with slots (43, 44) through the intersection of which the control lever passes.