baber/WOPTO huggingface dataset:
Patent GB-886822-A (GB)
Title: Improvements in speed control of separately excited direct current electric motors
Inventor: HIGGENS KENNETH HENRY
IPC: H02P7/26
Filed: 1957-12-11
Abstract: 886,822. Automatic speed-control systems. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Feb. 26, 1959 [Dec. 11, 1957], No. 38520/57. Class 38 (4). The speed of a D.C. motor 1 is maintained at an adjustable value by comparing the motor armature voltage with a reference voltage derived from a potentiometer 7 during non- conducting intervals of a thyratron 2 through which the motor is supplied. The reference potentiometer is connected in the grid control circuit of the thyratron and is supplied through a full-wave rectifier 6, a capacitor 8 and series resistor 9 being connected between a supply conductor 4 and the sliding contact of the potentiometer. The thyratron is thereby supplied with a pulsating biasing voltage the adjustable mean level of which is variable in accordance with the difference between the motor voltage, during the non-conducting intervals, and the reference voltage, whereby the firing periods of the thyratron are controlled in dependence upon the difference between the actual speed of the motor and the desired speed. In another arrangement, the alternating current component of the grid voltage is derived from an additional resistor and capacitor coupling the grid with the anode, the time constant of the resistor 9 and capacitor 8 being such that a substantial time-delay occurs between movement of the potentiometer 7 and a change of reference voltage across the capacitor 8, Fig. 2 (not shown).
Patent GB-1358641-A (GB)
Title: Producing foundry moulds and cores
IPC: B22C1/16
Filed: 1972-08-18
Abstract: 1358641 Foundry mould compositions TSENTRALNY NAUCHNO - ISSLEDOVATELSKY INSTITUT TEKHNOLOGII MASHINOSTROENIA 18 Aug 1972 38728/72 Heading C3N A self-hardening moulding mixture for the production of foundry moulds and cores comprises sand, an organic binder, and a particulate hardening agent containing 40-98% by weight of tricalcium aluminate, the hardening agent consisting of compounds which can be considered as notionally containing CaO and Al 2 O 3  in a molar proportion of 1À6 : 1-4 : 1 and impurities which do not interfere with the hardening of the mixture. The organic binder may be a lignosulphonate of an alkali metal, alkaline earth metal or ammonium; a soluble tar obtained in pyrolysis of wood pulp and treated with lime; or dextrin. Sulphite alcohol waste liquor is preferably used as the lignosulphonate containing material. The hardening agent is preferably used in an amount 3-12% by weight of the organic binder. The mixture may also contain a foaming agent, preferably in an amount 0À1-0À6% of the weight of the sand. The sand is preferably quartz.
Patent GB-979128-A (GB)
Title: Dispersion of nuclear fuel materials within a graphite matrix
IPC: G21C3/64
Filed: 1963-10-02
Abstract: 979,128. Nuclear fuel elements. UNITED STATES ATOMIC ENERGY COMMISSION. Oct. 2, 1963 [Dec. 6,1962], No. 38766/63. Heading G6C. A dispersion of nuclear fuel or blanket particles within a graphite matrix is made by tumbling the particles, e.g. ceramic-coated UO 2  or PuO 2  particles, within a rotating drum, simultaneously with the tumbling spraying the particles intermittently, i.e. between pauses when no spraying takes place, with a spray of solvent and with a spray of a slurry of graphite within a solution of a binder in a solvent, e.g. coal-tar pitch in benzene, removing the particles from the drum, pressing them into the required shape and pressure-baking the shape. In the two examples given the fuel particles were UO 2  spheres (100-150 microns in diameter) coated with 40 microns of vapour deposited Al 2 O 3  and similar spheres having concentric coatings of 14 microns of pyrolytic carbon and 29 microns of dense Al 2 O 3 . The solvent spray period is of longer duration and preferably overlaps the slurry spray period at both ends. The tumbling is continued between the periods of spraying. A more uniform dispersion is obtained by giving the particles a preliminary isostatic pressing within a pressing medium before coating is completed to solidify the particles individually; this is preferably carried out at twice the forming pressure and four times the pressure of the pressure-baking. It was found that with this latter treatment, the graphite crystallites were preferentially oriented parallel to the surfaces of the dispersed fuel particles. Such orientation is believed to provide isotropic matrix properties in the regions immediately surrounding the fuel particles, thereby enhancing mechanical strength and retention of fission product gases.
Patent GB-959869-A (GB)
Title: Oxasteroids of the pregnane series
IPC: A01N43/70
Filed: 1962-10-15
Abstract: The invention comprises compounds of the formula: <FORM:0959869/C2/1> wherein R is a hydrogen atom or an alkanoyl radical containing 1-6 carbon atoms.  These compounds are obtained by hydroxylating 17, 20; 20, 21 bis-methylenedioxypregna-1, 4-dien-3, 11-dione to obtain a mixture of 4, 5 dihydroxy-17, 20; 20, 21-bismethylene dioxypregn-1-ene-3, 11-dione and 1, 2-dihydroxy-17, 20; 20, 21-bismethylenedioxy pregn -4- ene-3, 11-dione treating the 1, 2-diol with lead tetracetate in acetic acid to obtain 17, 20, 20, 21-bismethylenedioxy-1, 11-dioxo-1, 2-SECO -A- norpregn-3-en -2- oic acid, reducing this compound to obtain 11 b -hydroxy-17, 20, 20, 21-bismethylenedioxy -2- oxapregn-4-en -3- one, oxidising the 11-hydroxy group thereof and heating with aqueous formic acid to obtain 17a , 21-dihydroxy -2- oxa -4- ene-3, 11, 20-trione, and reducing this trione to obtain the 5a  and 5b  isomers of 17a , 21-dihydroxy -2- oxa-pregnane-3, 11, 20-trione. Acylation of the 17a , 21-diols may be effected to obtain the corresponding 21-alkanoate.
Patent GB-1106931-A (GB)
Title: Improvements in apparatus for producing composite filter plugs
Inventor: WILLIAMSON DAVID THEODORE NELS
IPC: A24D3/02
Filed: 1963-10-04
Abstract: 1106931 Tobacco smoke filters MOLINS ORGANISATION Ltd 2 Oct 1964 [4 Oct 1963 8 Oct 1963 (3) 16 April 1964] 39207/63 39655/63 39657/63 39658/63 15800/64 and 28958/64 Heading A2C Apparatus for producing composite filter rod including portions of powdered material comprises means for feeding filter plugs in succession on to a continuous wrapper with gaps between successive plugs at regular intervals, means for filling the gaps with powdered material and means for folding the wrapper around the plugs and the material to form a continuous rod. As shown in Fig. 1, filter plugs P are fed in the direction PF over a paper wrapper 11 by an endless belt 8 beneath a wheel 3. The wheel 3 has pockets 6 which receive charges of powder from a hopper 2 and deliver the powder to the gaps between the plugs, the plugs and powder being subsequently wrapped by the paper 11. Masking plates 5 prevent the powder falling from the pockets 6. The wheel 3 and belt 8 are driven in timed relationship. In a further embodiment Fig.2 (not shown) two successive wheels 3 may be provided each having pockets which half fill the gaps between the plugs P. Alternatively, the wheels may drive an endless belt which is provided with the powder receiving pockets which may be filled directly from a hopper Fig.4 (not shown) or be filled from a further wheel having pockets which receive the powder from the hopper Fig.8 (not shown). In the embodiment shown in Fig. 3, the wrapper 11 is perforated by spikes 21 on a wheel 20 and transference of the powder assisted by suction applied from a suction box 30 through the perforations. The powder is held in the pockets 21 by suction applied to the base of each pocket 24 through drillings 26 which communicate with a suction chamber 28 within the wheel 23. Surplus powder is removed by a brush 34 and suction device 33. In a further embodiment the pockets are provided in an articulated endless band which is sprocket driven and the powder is positively ejected into the gaps between the plugs by plungers which slide in the pockets and are moved at appropriate times by means of a cam track Figs.6 and 7 (not shown). In another embodiment, Fig. 10, powder is fed from a hopper 89 to pockets 93 in a wheel 90 rotating about a horizontal axis between masking plates 91 and 92 and is ejected by air pressure applied through a pipe 98 (or by centrifugal force) Fig. 11 (not shown) into the gaps between the plugs P.
Patent GB-1493121-A (GB)
Title: Method of testing container end closures
IPC: G01M3/28
Filed: 1975-03-19
Abstract: 1493121 Leak testing AMERICAN CAN CO 19 Mar 1975 [26 Mar 1974(2)] 39252/74 Heading G1S A can end closure which has a displaceable tab 16 covering a pour aperture and sealed to the closure by a sealant, is tested for leakage by mechanically moving the closure relative to the tab to effect distortion of the sealant, applying fluidpressure to one side of the closure and detecting any leaking fluid at the other side of the closure. As shown, the closure may also have a vent aperture covered by a displaceable tab 18. In Figs. 3 and 5, a test chamber comprises a movable upper and a fixed lower part, the latter containing a support member 56 supported by springs 58. The closure to be tested is initially supported on member 56 by its tabs 16, 18, and the upper part 50 is moved to the closed position shown in Fig. 5. During the movement, the surface 90 on the upper part contacts the outer flange 38 on the closure and moves the closure downwardly relative to the tabs, thus distending the sealant, until part 36 of the closure abuts part 72 of support member 56. Thereafter, the member 56 moves with the closure until the position shown in Fig. 5 is reached in which sealed chambers are formed above and below the closure by sealing rings 40, 94. Air under pressure is applied above the closure, and the chamber under the closure is first vented to atmosphere and then connected to a pressure transducer, the output of which may be used to effect rejection of a leaking closure. The support member 56 may include a depression Fig. 9 (not shown), for receiving the tab 18 when this has a greater height than the tab 16. In the modification of Figs. 10 and 12 support member 56 is replaced by a fixed support member 156, and a support ring 166 lightly spring-biased upwardly by spring 168. The closure to be tested initially rests with its part 36 on the part 172 of support ring 166, Fig. 10. When the upper chamber part 150 is moved to the position shown in Fig. 12, tabs 16, 18 abut parts 162, 164 of fixed member 156 so that the sealant is distended during the latter part of the movement.
Patent GB-1563003-A (GB)
Title: Supercharged internal combustion engine
IPC: F02B37/04
Filed: 1976-09-22
Abstract: In the supercharged internal combustion engine (1) to which, in the event of an insufficient air supply, auxiliary air (16) can be fed by a turbocharger (8-10) by means of an injector (13) to which propellant air (15) can be admitted, it is intended by simple means to ensure an increase of the charger speed in the stationary partial load range and a shortening of the run-up time when accelerating. This is achieved in that the injector (13) is connected to a compressed air reservoir (14) and arranged outside the charging line (11) leading from the compressor (10) to the cylinders (2-5), in which line the auxiliary air delivered by the injector (13) can be introduced in the area downstream of the supercharger (10). This reduces the amount of air delivered by the compressor (10) and hence the power required for this, so that a greater part of the turbine power output is available for acceleration of the turbocharger. <IMAGE>
Patent GB-1112986-A (GB)
Title: Apparatus for making variably crimped yarn
IPC: D02G1/12
Filed: 1966-09-02
Abstract: A variably crimped yarn is produced in a stuffer crimper having a pair of feed rolls by periodically varying the pressure of the rolls on the yarn.  In one embodiment one or both rolls have one or more annular grooves-if a roll has more than one groove, the grooves are of varying widths and optionally of varying depths, and are variably spaced-with the yarn being traversed along the rolls by means of a trumpet guide reciprocated by a grooved cam roller.  The roller may be rotated by a variable speed motor controlled by a coarse and a fine potentiometer, the potentiometers being adjusted by separate, rotating cams.  The stuffer crimper has heating and cooling means. In a variation the rolls may be ungrooved but mounted at a slight angle to one another.  In another embodiment one feed roll is pivotally mounted and variable urged against the other roll by a cable connected, via a turnbuckle and a spring scale, to a rotating crank arm.  The crank shaft may be rotated by a variable speed motor as in the other embodiment.
Patent GB-1189071-A (GB)
Title: Improvements in or relating to Lattice Girders for reinforcing Concrete Panels and the like Structures
IPC: E04C/
Filed: 1968-08-19
Abstract: 1,189,071. Wire fabrics. BAU-STAHLGEWEBE G.m.b.H. 19 Aug., 1968 [24 Aug., 1957], No. 39573/68. Heading D1K. A wire fabric for reinforcing concrete or the like comprises a mat of longitudinal wires 1, 2 joined by transverse wires 3 at an acute angle to the longitudinal axis, which is bent about axis C-C. The mat is also bent about axes A-A to provide supports. The wires 2 may be fixed above or below the transverse wires. Several mats may be integrally constructed, and separated before bending.
Patent GB-1284752-A (GB)
Title: Fluid meter compensator
Inventor: STIENS ROBERT BLAZE
IPC: G01F15/04
Filed: 1969-08-07
Abstract: 1284752 Measuring fluid-flow MERCURY INSTRUMENTS Inc 7 Aug 1969 39667/69 Heading G1R In a temperature and pressure compensator apparatus 16, attached to a conventional gas meter Fig.1 (not shown) a Bourdon tube 43 is fed, at 47 with gas under pressure from a main gas supply and any variation in supply pressure rotates a threaded radially extending arm 48, carried by the closed upper end 45 of the tube 43, to pivot a steering wheel 63, through a rod 50 and arm 53, which causes arm 33 to pivot about a universal joint 37, mounted on a spring mounted plate 29 at a point remote from a drum 30, until the axes of the wheel 63 and drum 30 are parallel. The drum 30 has mounted on the periphery thereof a cam 32 provided with a leading edge in the form of a ramp 81 and a trailing edge 84 having a contour, mathematically determined, to provide the desired volume correction for pressure changes. The drum 30 is rotated by bevel gears 21, 22 driven by a shaft 20 from the conventional gas meter through a worm and wheel 26, 27, and in rotating causes the steering wheel 63 driven thereby to assume the aligned axial position, previously mentioned, to pivot arm 33, which arms 33 carries a channelled block 66 engaged on opposite sides of a follower wheel 68 slidably keyed on a shaft 72 which drives, through gears 85, 86 a register 14 giving a reading of volume compensated for pressure changes. The shaft 71 is journalled in arms 74, 75 loaded by a spring 77, adjusted by an eccentric 80, and intermittently rotated by the follower wheel 68 engaging the cam 32, the amount of rotation depending upon the position of the wheel 68 along the cam 32 determined by the steering wheel 63. The temperature compensation is effected by a mercury filled Bourdon tube 100, provided with a bulb portion disposed within the main gas supply line, which pivots a steering wheel 110, mounted on the end of an arm 93, engaging a frustoconical drum 92, driven by shaft 71, through gears 86, 85, 89, to effect a compensation for temperature changes. The steering wheel 110 on being moved takes up an axially aligned position with the drum 92 and the position of the wheel 110 on the drum 92 determines the rotation of the wheel 110 which drives through gears 112, 113 and 114 a register 15 giving a reading compensating for temperature changes.
Patent GB-1393056-A (GB)
Title: Metal mask screen for screen-printing
IPC: B41F15/36
Filed: 1973-08-22
Abstract: 1393056 Printing screen RCA CORPORATION 22 Aug 1973 [28 Aug 1972] 39740/73 Heading B6C A printing screen comprises a metal mesh having on it an image carrying layer of metal 2 occupying the central part of the mesh and being surrounded by a layer of synthetic resin 10, the metal layer having peripheral tabs 8 extending into the resin layer at points of stress. The periphery of the screen may have a layer of metal 12. The mesh is preferably nickel coated stainless steel and the metal layer 2 is of nickel. The synthetic resin is preferably diazosensitized hydrolysed polyvinyl alcohol.
Patent GB-895212-A (GB)
Title: Improvements in or relating to the marshalling of cans
Inventor: DAVIES PHILIP
IPC: B65G47/29
Filed: 1959-11-25
Abstract: 895,212. Conveying cans. METAL BOX CO. Ltd. Nov. 7, 1960 [Nov. 25, 1959], No. 40073/59. Class 78 (1). In apparatus for marshalling a mass of cans into a stream in which rows of the cans are moved in succession one after another, layers of cans are moved successively by a pusher device 3 from plates 4 of an hydraulic lift 1 on to a marshalling conveyer 5 which preferably comprises a woven wedge-wire belt. The conveyer is driven by a variable-speed drive 7 and electric motor 8 which also drive the other moving parts of the apparatus. The cans are moved by the conveyer into lanes formed by guide elements 9, the outlet ends of the lanes being provided with metering gates comprising sets of vanes 10, 11 mounted on carriages 12, 13 supported by bellcranks 14, 15. The carriages are transversely movable by cams 16, 17, cranks 19, 20 and pullrods 21, 22 connected to the bell-cranks 14, 15. A delivery conveyer 26 discharges into a shoot and is separated from the discharge end of the marshalling conveyer 5 by a stationary plate 25. For moving the rows of cans across the plate, a transfer device comprising pusher bars 32 carried by chains 33 is provided. In normal operation and at the commencement of a metering cycle, the leading row of cans are located between the vanes 10 of the first gate and are retained by the vanes 11 of the second gate, Fig. 6. The first gate 10 is then moved to the right, Fig. 7, and prevents passage of cans from the lanes. Simultaneously, the vanes 11 of the second gate prevent movement of cans disposed between the vanes 10 of the first gate. The second gate is then moved to the left, Fig. 8, thus releasing the row of cans in the first gate for movement by the marshalling conveyer 5, the transfer device, and the delivery conveyer 26. Following the release of the cans by the second gate, cam 17 moves the second gate to its initial position and the vanes 10 are moved back into alignment with the guide elements 9. In the event of a stoppage on the delivery conveyer 26 or in the event that the number of cans in any lane should be less than that of a predetermined number operation of the first metering gate is interrupted by a mechanism controlled by a solenoid valve. Fingers 57 detect whether there are less than a minimum number of cans at the outlet of any lane, downward movement of a finger actuating a pressuresensitive switch 61 connected in the circuit for the solenoid valve.
Patent GB-1412549-A (GB)
Title: Piezo-electric crystal oscillators
IPC: G04F5/06
Filed: 1973-08-24
Abstract: 1412549 Transistor oscillator circuits SUWA SEIKOSHA KK 24 Aug 1973 [28 Aug 1972] 40257/73 Heading H3T In a piezo-electric oscillator comprising an IG-FET inverter stage or an odd-number sequence of such stages in cascade, I1 ... In, Fig. 2, a piezo-electric crystal X connected in a feedback path across said sequence, and a selfbias generating resistance Rf also across at least part of the sequence, the resistance comprises the source-drain path of a further IG-FET. In an embodiment, the oscillator comprises a pair of IG-FETs Trp, Trn, Fig. 6, of opposite conductivity type, back coupled over crystal X and a phase-shifting network comprising capacitors Cd and the resistance provided by the source to drain paths of complementary IGFETs Gnc, Gpc. Back-coupling determining the bias is provided by the source to drain paths of a complementary pair of IG-FETs Trnf, Trpf. In a simplified arrangement, the phase-shifting network comprises a single capacitor (Cd, Fig. 5, not shown). The arrangement is more particularly intended to be formed as an integrated circuit, and for use in a timepiece.
Patent GB-877365-A (GB)
Title: Improvements in or relating to foot exercise sandals
IPC: A43B3/10
Filed: 1959-11-26
Abstract: 877,365. Sandals. SCHOLL MFG. CO. Ltd. Nov. 26, 1959 [Nov. 26, 1958; Jan. 29, 1959], No. 40277/59. Class 17(2) A foot exercise sandal comprises a wooden sole 1, Fig. 2, having a transversely curved hump 4, for engagement by the toes, and a strap 7, 7<SP>1</SP> Fig. 20, located in front of the instep. The hump 4 is low under the small toe, increases in height under the middle toe and decreases under the big toe to merge into a depression 3 for the ball of the foot. A depression 2 is also provided for the heel. The strap halves 7, 7<SP>1</SP> may be of padded leather or plastic and are attached to the sole by screws or bolts in conjunction with spiked washers and metal plates. A buckle may have one or two prongs 34 and a sleeve 36 slidable to cover the prongs when the buckle is fastened. A toe separating sleeve 19 may be fitted to the sole and supported by an extension 31 of the strap half 7. Grooves may be formed in the base of the sole to reduce its weight and a layer of rubber may be attached.
Patent GB-844577-A (GB)
Title: Hand fire extinguishers
IPC: A62C13/00
Filed: 1958-12-16
Abstract: 844,577. Fire extinguishers; fluid projecting pistols. HERBERG, E. Dec. 16, 1958 [Dec. 16, 1957; Dec 4, 1958], No. 40542/58. Classes 47 and 119. A fire extinguisher, which may serve also as a defensive weapon, comprises a housing 1 in the form of a pistol constituting a container for extinguishing liquid, a trigger 19 on the housing, and a pressure gas device 2 connected to the trigger. A riser tube 3 has one end extending into the butt 5 of the pistol housing and has its other end at the muzzle of the pistol housing where it is connected to a nozzle 6 having a renewable blowout sealing foil 8. A second nozzle 11 communicating with the nozzle 6 and having a renewable blowout sealing foil 12 serves as a reserve nozzle which becomes operative in the event of failure of operation of the blowout foil of the nozzle 6. The pressure gas device 2 comprises a housing 22 removably carrying at one end a compressed gas container 17 and pivotally carrying at the other end the trigger 19 which is in operative engagement with a striker 25 guided in the housing 22, the striker having a sharp-edged tube 27 for piercing the closing diaphragm of the compressed gas container 17. The housing 22 is removably secured to a sleeve 28 communicating with the housing 1 through an aperture 32 normally closed by a renewable blowout foil 34. A liquid filling opening having a screw closure 14 is provided in the underside of the butt 5. The trigger is provided with a safety device.