baber/WOPTO huggingface dataset:
Patent GB-920699-A (GB)
Title: A gate valve employing lubricant or plastic sealant for sealing between the gate andseat elements
IPC: F16K3/36
Filed: 1959-11-23
Abstract: 920,699. Valves. A. S. VALPIN. Nov. 23, 1959 [Aug. 24, 1959], No. 39715/59. Class 135. A gate valve 20 slides between two annular seats 44 axially slidable sealingly in sockets around the flow parts and loaded on to the gate by springs 48 and by the pressure of sealing liquid acting over the back of the seat and flowing from a chamber 51 through a housing passage 58 and a seat passage 59 to an annular seat sealing groove 60 via a " jumper " groove 61 in the gate when the valve is closed, the pressure in the chamber 14 within which the gate moves being relieved to the low-pressure side of the valve via a relief ball valve in one of passages 62 formed in both the seats. Upstream pressure, which may be at either side of the valve, acts via a passage 54 on a piston 53 to pressurize the sealing liquid. The housing is formed by nozzle sections 19 socketing into and welded to cross-plates 11 which are welded to side-plates and a bottom plate 13, a rectangular bonnet 28 being locked between the sections 19 and the side-plates by bolts 29. In an alternative embodiment the seats carry metal reinforced resilient sealing-rings and the pistons 53 force lubricating sealing liquid through the passages 58, 59 and over the rings.
Patent GB-1104318-A (GB)
Title: Improvements in and relating to glands for oil pumps
IPC: F16J15/34
Filed: 1965-09-17
Abstract: 1,104,318. Mechanical seals. DANFOSS A.S. 17 Sept., 1965 [18 Sept., 1964], No. 39815/65. Heading F2B. In a mechanical seal 3 for an oil pump and comprising a sealing ring 8 mounted on the pump shaft 1 for rotation therewith and resiliently urged into facial sealing contact with a non-rotatable seating ring 10, the sealing ring is of carbon and at least the sealing contact face of the seating ring is of molybdenum. The sealing ring 8 is sealed to the shaft by an 0-ring 9 and urged by a spring 6 into contact with a molybdenum layer 12 on the seating ring 10 which is fixed to a plate 4.
Patent GB-1273172-A (GB)
Title: Particle studying apparatus
Inventor: EPSTEIN SHELDON L
IPC: G01N15/12
Filed: 1969-08-08
Abstract: 1,273,172. Particle analysing apparatus. COULTER ELECTRONICS Ltd. Aug. 8, 1969, No.39838/69. Heading G1N. In a Coulter particle analyzer, a source of constant voltage 31 is connected in series with the particle scanning apparatus 12 and in parallel with a current-to-voltage transformation circuit 63, and a signal detecting device 64 so that the analyzer need not be re-calibrated when used with liquids of different conductivities. As shown, the constant voltage source is regulatable such that a detectable signal Ed for the detecting device is provided to take into account the varying sizes of particles which may be analyzed. The transformation circuit includes a transformer 63 having a number of tapping points on the primary and secondary windings, although a resistor, inductor, capacitor or amplifier may be used. The analyzer is designed so that with respect to the scanning apparatus the voltage source has a low impedance and the detecting device has an effective high impedance. Specifications 722, 418, 865, 069, 903, 156, 907, 028, and 968, 491 are referred to.
Patent GB-830763-A (GB)
Title: Improvements in or relating to apparatus for the treatment of granular bulk materials
IPC: C12C1/15
Filed: 1957-12-23
Abstract: 830,763. Malt stirrers. KOCH, H. R. W. A. Dec. 23, 1957 [Dec. 24, 1956], No. 39915/57. Class 86 A malt treating bin has a displaceable partition, a horizontal conveyer screw and a traversing carriage with a plurality of vertical conveyer screws, any or all of which may be coupled together, as desired, to perform loading, turning or discharging operations. Rails 35 extend across the top of the bin 28 and a carriage 1 is driven along these, through a gear 5 and rack 5a. This carries six vertical screws 2, arranged across the bin, by means of which the contents can be lifted, for turning over, as the carriage is moved across the bin. A horizontal screw 18 is also engaged on the rails 35 and may be coupled to the carriage 1, by clamps 11, so that it is carried across the bin and evenly distributes grain which is fed in through a duct 29. During this operation a folding wall 22, hinged at 21, is moved up to a horizontal position over the screw 18. A second assembly, comprising a vertical wall 16 and a horizontal platform 17 mounted on a frame 13, may also be coupled to the carriage and, in this case, grain is lifted by screws 2 and passed sideways by screw 18 to a discharge connecter 25, from which it is removed by a suction fan.
Patent GB-1431972-A (GB)
Title: Interdigital capacitors
IPC: H01P1/203
Filed: 1973-08-23
Abstract: 1431972 Microwave transmission lines WESTERN ELECTRIC CO Inc 23 Aug 1973 [28 Aug 1972 (2)] 39963/73 Heading H1W An interdigital capacitor comprises first and second sections 10A, 10B of conductor each with a set of fingers 12A, 12B which interfit with a gap 14 between them constituting a resonant transmission line and at least one slot 13 cut into one of the sections and coupling into the gap 14 to reactively load the transmission line and shift its frequency of resonance. The slot or slots can be positioned anywhere along the gap depending on the mode of resonance which is to be suppressed. A resistive film can be provided over the slots 13 to dissipate the energy of the shifted resonance. A typical application is the decoupling of the D.C. bias voltage applied to a diode oscillator, Figs. 6 to 9 (not shown).
Patent GB-1518278-A (GB)
Title: Ball-handling implements
IPC: A01D90/02
Filed: 1974-09-13
Abstract: 1518278 Bale wagons implement hitches SPERRY RAND CORP 11 Sept 1975 [13 Sept 1974] 39983/74 Addition to 1390142 Heading A1P [Also in Divisions B8 and F2] The bale-handling apparatus of the Parent Specification is modified so that the towing tongue 1 can be pivoted between its straight ahead transport position and its inclined collecting position and the frame of the loader mechanism 8 can be tilted about the horizontal pin 14 by a single double acting hydraulic cylinder 36. The cylinder 36 is connected between a pivot 37 on the tongue and a pin 38 in an aligned slot 39. A lever 40 pivoted on the chassis is coupled to the pin 38 and is connected by a cable 43 to a point 41 on the loader 8 while a spring 45 connected to a point opposite 41 keeps the cable in tension. A latch pin 32 engages an extension 33 to hold the tongue 1 in either of its position and if the cylinder 36 is now actuated the cable 43 and spring 45 will tilt the loader 8 accordingly. If the pin 32 is released by a pull rod 34 actuation of the cylinder 36 will pivot the tongue 1 while at the same time loosening the cable 43 so that the frame of the loader 8 returns to a vertical position. Since the thrower 22, 23 of the loader runs faster than pick up device chain 16 damage can occur to a bale if it becomes engaged by the thrower before its release by the chain 16. This is prevented by either including a free wheel clutch, Group F2 in the drive of the chain 16 or by pivotally mounting the tines of the chain 16 so that they pivot out of engagement with the bale if it is pulled by the thrower.
Patent GB-1109809-A (GB)
Title: Flow improvers and petroleum oils containing same
IPC: C08F12/08
Filed: 1966-09-07
Abstract: Acyl polystyrenes having C18- 24 acyl side chains attached to the polystyrene nucleus are produced by mixing styrene with an inert solvent, gradually adding over a period of 1/4 -4 hours a C18- 24 carboxylic acid halide/Friedel-Crafts catalyst complex and simultaneously polymerizing and acylating the styrene at - 13 DEG  F. to 212 DEG  F. for a total period of 1/2 -12 hours and then hydrolysing the resulting complex, e.g. using a mixture of water, isopropanol and hydrochloric acid.  The catalyst complex may be a C20 and/or C22 carboxylic acid chloride/aluminium chloride complex. The solvent may be cyclohexane.ALSO:An oil composition comprises a wax-containing petroleum oil, e.g. a residual oil boiling above 650 DEG  F. and of flow point above 75 DEG  F., and e.g. 0.01-5.0% by wt. of a blending agent for improving the flow characteristics of the oil which is an acyl polystyrene having C18- 24 acyl side chains attached to the polystyrene nucleus which is produced by mixing styrene with an inert solvent, gradually adding over a period of 1/4 -4 hours a C18- 24 carboxylic acid halide-Friedel-Crafts catalyst complex and simultaneously polymerizing and acylating the styrene at -13 DEG  to 212 DEG  F. for a total period of 1/2 -12 hours and then hydrolysing the resulting complex.
Patent GB-1383857-A (GB)
Title: Mechanism for bending steel reinforcing mats
IPC: B21D11/12
Filed: 1972-08-30
Abstract: 1383857 Bending metal R BOCK 30 Aug 1972 [14 Sept 1971] 40174/72 Heading B3E Apparatus for bending steel reinforcing mats comprises a fixed beam having a surface for receiving the mat and hook-like mat-holding devices at spaced intervals above the surface, and a swivelable bending beam having a swivel axis parallel to the surface and hook-like bending members engageable in a mat held on the surface. In Fig. 3, the fixed beam 12 is shown in section, and the holding devices comprise elements 14 extending parallel to the beam from mounting parts 140 in the beam, so that rods 27 of the mat 27, 28, can be engaged under elements 14. The mat can be held down by a member 30 within the beam having slanting cams 31 engaging slanting slots 141 in the mounting parts 140, the member 30 being slidable along the beam by an hydraulic piston and cylinder. The bending beam 15 is swivelable about axis 21, and supports bending elements 22 extending parallel to axis 21 and located each in the same transverse plane as a holding element 14 so as to be engageable with rods 27. The beam may be swivelled by a mechanical, pneumatic, or hydraulic drive, the final element of which may be a rack and pinion. The bending elements 22 may be engaged above the rods 27, to bend the mat around a fixed semicylindrical former 25, as shown at 27<SP>11</SP>, or may be located below the rods, and bend the mat about the holding elements 14, and such bending may occur on either side of the beam 12. In another embodiment, the swivel axis 21 is located to one side of beam 12. In a third embodiment, Fig. 9, the bending beam 152 is cylindrical, and is mounted by arms 43 and collars 44 to swing about the cylindrical fixed beam 40. The latter supports fixed axially extending elements 45, 47, 48, on which formers 50, 50<SP>1</SP> of different size may be located, for bending the mat about any of the fixed elements. The bending elements 41 are supported on collars 151 surrounding beam 152, and are angularly adjustable as at 41, 41<SP>1</SP> to positions suitable for co-operating with different size formers 50, 50<SP>1</SP>. The bending and holding elements may be rollers.
Patent GB-1410853-A (GB)
Title: Pharmaceutically useful prostaglandin derivatives
IPC: C07D309/12
Filed: 1973-08-24
Abstract: 1410853 Prostaglandins SANKYO CO Ltd 24 Aug 1973 [1 Sept 1972] 40175/73 Heading C2C Novel compounds of Formula I in which A=C 4-8  alkylene, R<SP>1</SP>= C 4-10  alkyl, R<SP>2</SP>=H or C 1-6  alkyl and R<SP>3</SP>=H or C 1-6  alkoxycarbonyl, and pharmaceutically acceptable acid addition salts thereof, are prepared by reducing a compound of Formula II, II or IV with a metal hydride complex reducing agent and, if appropriate, salifying the product obtained. Compounds I in which both R<SP>2</SP> and R<SP>3</SP> are H can also be prepared by hydrolysis of a compound I in which R<SP>2</SP>=alkyl and/or R<SP>3</SP>= alkoxycarbonyl. The corresponding groups can also be removed from compounds II, III and IV, to give compounds in which R<SP>2</SP> and R<SP>3</SP> are H. Starting materials of Formulae II and IV and intermediates therefor are prepared by the following reaction schemes Pharmaceutical compositions having oxytocic activity, for parenteral administration, comprise a compound I, or a pharmaceutically acceptable salt thereof, together with a pharmaceutical carrier or diluent.
Patent GB-934968-A (GB)
Title: Method of pelleting hay
Inventor: KING WILLIAM N
IPC: A23K1/00
Filed: 1961-11-09
Abstract: Pellets of hay or other similar plant material, e.g. sugar cane, are prepared by masticating the hay to crush, rupture and tear it and compressing, e.g. at 200 to 1600 p.s.i., the resultant damp limp fibrous mass into pellets, the juices liberated during the mastication acting as binding agent.  Before mastication the moisture content of the hay is preferably 14 to 35%.
Patent GB-1337819-A (GB)
Title: Vacuum cleaning implement
IPC: A47L9/02
Filed: 1971-08-27
Abstract: 1337819 Suction cleaning implement ELECTROLUX Ltd 27 Aug 1971 [9 Sept 1970] 40290/71 Heading A4F A suction nozzle includes a fixed mouth 15 and a brush 20 movable between an upper retracted position in which the mouth 15 contacts the working surface and a lower position in which the brush contacts the working surface, the brush being shifted automatically between the two positions according to the pressure conditions in the suction channel 16. The brush 20 is mounted in a holder 19 attached to a diaphragm 18. At each end of the implement a spring 23 presses down on a metal plate 22 attached to diaphragm 18 to move the brush to its lowermost position in the absence of a vacuum above the diaphragm. A channel 35 above the diaphragm. 18 communicates with a space 33 which is connected through a diaphragm valve and a channel 24 with a first point in the suction channel 16. The diaphragm valve includes an upper chamber 25 connected to channel 24, and a lower chamber 29 communicating through opening 30 with a second point in the suction channel 16. A constriction 31 is placed between the first and second points. When cleaning a hard floor, there will be a large flow of air in channel 16, the vacuum at the first point will be greater than at the second point, valve 27 will be closed and the brush will be in its lowermost, extended position. On a soft surface such as a carpet, there will be a small flow of air in channel 16, the vacuum at the first point will be substantially the same as at the second point, the valve 27 will open, space 35 will be placed under vacuum and the brush will be lifted to its uppermost retracted position. A constriction may be provided where channel 24 joins chamber 25 Fig.3 (not shown).
Patent GB-950535-A (GB)
Title: Preparation of polyesters
IPC: B01J19/18
Filed: 1961-11-10
Abstract: <PICT:0950535/C3/1> Polyesters are made by heating a mixture of a polyol and a dicarboxylic acid or anhydride thereof in the substantial absence of a solvent, passing inert gas through the reaction mixture to remove water as well as vapours of the polyol, passing the evolved gaseous compound upwardly through a fractionating zone, the lower portion of which is maintained at a temperature above the boiling point of water and below the boiling point of the polyol, while the top of the zone is maintained at a temperature not exceeding the boiling point of water by directly introducing water therein whereby to condense out the vapour of the polyol without condensing the water vapour, and returning the polyol to the reaction mixture while permitting the inert gas and the water vapour carried therein to escape from the system.  The reaction mixture is charged into a reactor 10 provided with a heating jacket 11, a heating coil 11a, a mechanical stirrer 14 and an inert gas inlet 15.  The reactor is connected by line 16 to a fractionation column 17 from which a vapour line 19 leads to a condenser 21, condensate from which passes to a chamber 24. Part of the water from chamber 24 is fed to the column 17 through a spray nozzle 31.  Temperature measuring devices 32, 32a and 32b in the column may control the flow of water to the nozzle 31 so that if the temperature at the top of the column rises to the boiling point of water, the flow of cooling water to the nozzle is increased. At the beginning of the reaction (especially if a dicarboxylic acid anhydride is a reactant), a reduced gas flow is maintained, then when substantial quantities of water are evolved, the rate of flow is increased.  When nearly all of the water had been evolved, the temperature in the reactor is increased and little or no cooling water supplied to the nozzle 31.  Finally the rate of flow of inert gas is still further increased and the gas switched from the column to the atmosphere by means of valves 40 and 41.  Examples describe the manufacture of polyesters by reacting (1) Maleic anhydride, phthalic anhydride and propylene glycol; (2) Maleic anhydride and diethylene glycol followed by the addition of phthalic anhydride and propylene glycol and further reaction; (3) Maleic anhydride, imphthalic acid and propylene glycol; (4) Maleic anhydride, phthalic anhydride, propylene glycol and diethylene glycol.  Other polyester forming components mentioned are chlorendic, tetrachlorophthalic, tetrahydrophthalic, adipic, succinic, terephthalic and fumaric acids or anhydrides; and ethylene-, triethylene-, dipropylene-, tripropylene- and butylene-glycol and glycerine.
Patent GB-1404231-A (GB)
Title: Fences
IPC: E04H17/10
Filed: 1972-08-31
Abstract: 1404231 Wire fencing; releasable fastenings GRANGES ESSEM AB 31 Aug 1972 [1 Sept 1971] 40457/172 Heading E1B and E2B Supporting wires 13, 14 of a wire mesh fence are secured to extruded plastics or metal posts by locking members 18 pressed into groove 17 around the wires. The recess in the locking member may be suoh that the wire is movable longitudinally of the fence or it may be such as to firmly grip or even slightly deform the wire.
Patent GB-1466963-A (GB)
Title: Millimeter wave pumped parametric amplifier
IPC: H03F7/04
Filed: 1974-09-18
Abstract: 1466963 Parametric amplifiers NATIONAL AERONAUTICS & SPACE ADMINISTRATION 18 Sept 1974 [2 Oct 1973] 40704/74 Heading H3X A parametric amplifier includes a housing 12 defining a waveguide 30 for a pump frequency having an electric field E in a predetermined direction (upwards in the cross-section of Fig. 2) and containing a pair of uncased varactor diodes 18, 20 disposed in the predetermined direction and connected in series with respect to the pump energy but in parallel with respect to the inner and outer signal conductors 58, 54, there being stubs 94 in the predetermined direction in the waveguide defining a capacitive gap 112 for series resonating the diodes at the idler frequency. The inner conductor 58 has a  wave section 142 to match the line and diode impedances, a ¢ wave series resonator section 144, a capacitive section 146 and an inductive section 147 so that the signal circuit is double-tuned by the diodes, inductive section and capacitive section and by the series resonant section. The inner conductor 58 extends to the diodes by means of a rod 70 fixed to a wafer 14, Fig. 2, carrying members 82, 84 with whiskers 90, 92 contacting the diodes 80 as to connect them in parallel to the outer signal conductor via the wafer and also carrying the stubs 94, one of which is movable to adjust the tuning capacitance of the gap 112. The stub diameter and/or whisker length form an initial reference for the idler frequency tuning. The wafer 14 is clamped in the housing by nut 42 and sleeve 36. The waveguide has a constricted section 30 acting as a band pass filter to the pump frequency and is closed by an adjustable end wall 32 to tune the waveguide to the pump frequency and to match its impedance to the pump source 128.
Patent GB-1200407-A (GB)
Title: Improvements in or relating to magnetic heads
IPC: G11B15/62
Filed: 1968-08-27
Abstract: 1,200,407. Magnetic heads. GENERAL ELECTRIC CO. 27 Aug., 1968 [30 Oct., 1967], No. 40838/68. Heading G5R. The air accompanying a moving magnetic tape is diverted in advance of the tape-contacting region of a magnetic head by one or more prominent lips extending across the head. As shown, the lips define slots 28 in advance of multitrack write 22 and read 23 sections of a head block having a recess 18 adjustably receiving an erase had 19. The slots may be tapered or inclined to direct the air sideways (Figs. 4, 5, not shown). If the depth of the valley 41 between the sections 22, 23 (the valley normally containing screening material) is less than the radius of curvature of the head crowns, an air pressure relief slot (42, Fig. 3, not shown) is provided in the valley, parallel to the gaps.
Patent GB-1527593-A (GB)
Title: Vehicle anti-skid braking systems
IPC: B60T8/173
Filed: 1974-09-19
Abstract: 1527593 Detecting wheel skid LUCAS ELECTRICAL Ltd 12 Sept 1975 [19 Sept 1974] 40840/74 Heading G1N(A) In a vehicle anti-skid system the output terminals 26, 27 of a transducer 10, which produces oscillatory signal at a frequency dependant on wheel speed, are biased to a D.C. voltage ¢V1 and connected via equal value capacitors Cl, C2 to earth and via equal resistors Rl, R2 to the,input control terminals of a comparator Al in a control circuit for releasing the brakes when the rate of decrease of said frequency exceeds a predetermined value. The arrangement provides high common mode reiection and enables simple twisted leads to be used between the transducer and the control circuit. A control circuit for transducers 10,11 detecting left and right rear wheel speed, comprises pulse squaring circuits 12, 13 each as shown in detail in Fig. 2 frequency to voltage converters 14, 15 and Fig. 3 (not shown) producing positive pulses of an amplitude determined by the input frequency and differentiating circuits 16, 17 and Fig. 4 (not shown). Each circuit 16, 17 which include a passive low pass filter at the input stage to pass on only the average D.C. component of the input signal provides an output the magnitude of which depends on the rate of change of the input signal. When the output of either circuit 16, 17 rises above a threshold level, indicating abnormally just wheel deceleration, the output of a comparator (A4), Fig. 5 (not shown) in a threshold comparator circuit 20, 21 falls and an associated transistor (T2L or T2R) Fig. 6 (not shown) in the output circuit 24 becomes conductive drawing base current from a driver transistor (T4) and energising a solenoid 25 via a power transistor (TS), thereby effecting brake release. Compensation circuits 22, 23, and Fig. 7 (not shown) recognise high frequency fluctuations in wheel speed caused by paved or cobbled roads and inhibit energisation of the solenoid 25 from this effect alone. A warning lamp 19 is illuminated via a switch actuated by the brake pedal or by the circuit 18 and Fig. 8 (not shown) whenever the output of the two frequency to voltage converters differ by more than a predetermined amount. The two comparator Al, and the two comparators (A4) of circuits 20, 21 may be provided by a single integated circuit. Two amplifers (A2) in circuits 14, 15 and two amplifiers (A3) in circuits 16, 17 may be provided by a further single integrated circuit.