baber/WOPTO huggingface dataset:
Patent GB-1030416-A (GB)
Title: Improvements in the bleaching of cellulose pulp
IPC: D06L4/00
Filed: 1963-02-21
Abstract: Cellulosic pulp, e.g. pulp obtained from wood, straw or bagasse, is bleached by a continuous process comprising treating it with an excess of a bleaching solution, subjecting the pulp-bleach mixture obtained to bleaching conditions, recovering the bleaching solution from the mixture when the pulp has been bleached to only 50-95% of the maximum brightness obtainable under the bleaching conditions or when the rate of consumption of the bleaching agent decreases or the rate of increase of the brightness in the pulp decreases, in an amount increasing the density of the remaining bleached pulp to at least three times the density of the pulp-bleach mixture and recycling 50-100% by weight of the recovered solution for the bleaching of fresh pulp, the ratio of recycled to fresh bleaching solution, the ratio of the densities prior to and after addition of the bleaching solution and the ratio of the density prior to addition of the bleaching solution to the increased density being maintained constant during the process.  The bleaching agent may be an aqueous alkaline solution saturated with gaseous oxygen, liquid chlorine, aqueous solutions of chlorine, sodium hypochlorite, calcium hypochlorite, sodium peroxide, hydrogen peroxide, chlorine dioxide, calcium bisulphite, sodium bisulphite, sodium hydrosulphite or zinc hydrosulphite.  Bleaching adjuvants, e.g. sodium hydroxide, sodium silicate polyphosphates and ethylene tetraacetic may be added to the bleaching solution.  The density of the pulp-bleach mixture may be increased by using band pressure filters, suction drum filters, double screen presses, screw presses, roller presses or centrifuges. The ratio of the density prior to and after the addition of the bleaching agent may be at least 3:1.
Patent GB-536861-A (GB)
Title: Yarn guiding means for textile doubling and twisting machines
IPC: B65H57/16
Filed: 1940-04-20
Abstract: 536,861. Doubling and twisting frames. TATTERSALL, E. April 20, 1940, No. 7155. [Class 120 (ii)] The yarns or ends from the creel of a yarn doubling and twisting machine are separated and guided by a yarn guide having spaced slots for the ends and adapted to be hung or suspended on a support rod or bar so as to be freely slidable thereon. As shown the yarn guide g is formed from a rectangular plate having its upper portion g' bent to hook in a support rod a and provided with two or more slots g<SP>2</SP> through which the ends from the creel B pass and are uniformly spaced thereby.
Patent GB-1386870-A (GB)
Title: Prostaglandins and the preparation thereof
IPC: C07C405/00
Filed: 1972-02-16
Abstract: 1386870 Prostaglandins UPJOHN CO 16 Feb 1972 [11 March 1971] 7171/72 Heading C2C [Also in Divisions C3 and A5] The invention comprises optically active compounds of the formulae or racemates thereof, wherein R 1  is H or C 1-8  alkyl, and R 2  and R 3  are H, methyl or ethyl, provided that at least one of R 2  and R 3  is not H, and pharmacologically acceptable salts thereof and their preparation. The 16-alkyl and 16,16-dialkyl PGF 1#  compounds are obtained by reducing the corresponding 16-alkyl and 66,16-dialkyl PGE 1  compounds and separating the 9# hydroxy isomer and the 16-alkyl and 16,16-dialkyl PGA 1  and PGB 1  compounds are prepared by dehydrating the corresponding 16-alkyl and 16,16-dialkyl PGE 1  compounds, followed by, if desired, hydrolysis of any resulting esters or esterification of any resulting acids. The following intermediates and starting materials are prepared: 6 - (3 - methyl - cis - 1 - heptenyl)bicyclo [3,1,0]hexan - 3 - one; 7 - [6 - (3 - methyl - cis- 1 - heptenyl) - 3 - oxo - bicyclo[3,1,0]hex - 2α- yl] - heptanoic acid and its methyl and 2,2,2-trichloroethyl esters; methyl 7-[6-(1,2- dihydroxy - 3 - methylheptyl) - 3 - oxobicyclo- [3,1,0]hex - 2α - yl] - heptanoate and its bis - (methane - sulphonate; 16-methyl-PGE 1 , 16,16-dimethyl-PGE 1 , 16-ethyl-PGE 1 , 16-ethyl 16-methyl-PGE 1 , and 16,16-diethyl-PGE 1 , and their methyl and 2,2,2-trichloroethyl esters; 7 - [3 - hydroxy - 6 - (3 - methyl - cis - 1-heptenyl)bicyclo[3,1,0)- hex - 2α - yl]heptanoic acid and its methyl ester; 7-{6-[3-methyl-(or 3,3- dimethyl-, or 3,3-diethyl-, or 3-ethyl-, or 3 - ethyl - 3 - methyl) - cis - 1 - heptenyl) - 3- oxobicyclo[3,1,0]hex-2α-yl}heptanoates.
Patent GB-827810-A (GB)
Title: Method and apparatus for producing a strip from a block of resilient material
IPC: C14B1/14
Filed: 1958-03-06
Abstract: 827,810. Splitting-apparatus. MASCHINENFABRIK TURNER A.G. March 6, 1958 [March 22, 1957], No. 7255/58. Class 31 (1). A method of peeling a continuous strip of uniform thickness from a block of resilient material comprises joining the ends of the block to form an endless band, moving this band cyclically past a peeling knife and moving the position of the band at the end of each cycle to compensate for the thickness of the layer removed in the preceding cycle. As shown, a block a has its ends cemented together at a<SP>1</SP> to form an endless band which is passed between a gauging roller b and a supporting roller d to a band knife i, the material being supported by a conveyer belt running over a table e, the parts d, e, f forming a unitary structure which can be adjusted vertically by an electric motor driving suitable mechanism. The motor is operable through a time delay relay by means of a rockable feeler roller l when this, on moving over the ramp portion, Fig. 4, of the band, closes a microswitch m. The amount by which the structure d, e, f is moved each time is set by an electric counter having a pre-setting mechanism which controls the number of turns made by the adjusting motor. The band knife may be replaced by an oscillating knife.
Patent GB-873637-A (GB)
Title: Glove
Inventor: CARVER ROGER FRANCIS
IPC: A41D19/02
Filed: 1958-03-06
Abstract: 873,637. Gloves. DENT, ALLCROFT & CO. Ltd. Dec. 1, 1958 [March 6, 1958], No. 7274/58. Class 141 A glove or glove lining is made from a onepiece blank as shown. The edges BC, GH, IC are joined to the edges DE, FE, IGH respectively to form seams extending from the wrist, base of first finger, and thumb tip and meeting at a point between the thumb and first finger.
Patent GB-751519-A (GB)
Title: Improvements in devices for admitting air to the induction passage of an internal combustion engine
IPC: F01L13/06
Filed: 1954-03-12
Abstract: 751,519. Auxiliary air admission. BENDIX AVIATION CORPORATION. March 12, 1954. [March 31, 1953], No. 7307/54. Classes 7(2), 7(3) and 7(6) [Also in Group XXXVII] An extra-air inlet 32 leading into the induction pipe 30 or carburetter outlet pipe is opened by a solenoid-actuated valve 34 to reduce the suction in the inlet manifold during overrunning, the circuit of the solenoid 38 being controlled by a first switch 18 responsive to a predetermined high intake manifold suction to open the valve 34 and by a second switch 16 responsive to a predetermined low suction to maintain the valve open until the intake manifold suction drops to this low value. The solenoid 38 is carried by number of arms 46 bolted to the end of the air inlet 32 and is surrounded by a filter 50. Each of the switches 16, 18, comprises a spring- loaded suction operated diaphragm 64, Fig:. 2, connected to a rod 66 which normally urges contacts 62, 60, apart, the diaphragm spring 68 being adjusted by a screw 76 so. as to be overcome by the suction acting on the diaphragm 64 at a value of about twenty two inches of mercury for the switch 18 and about five inches of mercury for the switch 16. The circuit of the solenoid 38 also includes an overriding switch 56, Figs. 1 and 4 which is normally open and is'closed when the throttle valve 20' is closed by a rod 84 operated from the throttle valve by a cam 86. When the throttle valve 20 is closed and the engine overruns, the switch 56 is closed and the high intake pipe suction closes the switches '16, 18. Closing of the switch 18 completes the circuit 104, 110, of a relay 90 which opens a switch 118 in the ignition circuit and closes switches 114, 116, to complete the circuit of the solenoid 38 and open the extra-air valve 34. The suction in the intake pipe is immediately reduced and switch 18 opens but the relay 90 remains energized through the circuit 120, switch 116, wire 123, switch 114 and wires 106, 110 and the extra-air valve remains open until the suction drops below the value necessary to close switch 16, unless the throttle valve is re-opened which immediately breaks the switch 56 and de-energizes the relay 90 to open switches 114 116 and close the ignition switch 118. In a modification the solenoid 38 is mounted coaxially with the spindle of the valve 34.
Patent GB-675542-A (GB)
Title: Manufacture of chlorine dioxide
IPC: C01B11/02
Filed: 1950-03-23
Abstract: <PICT:0675542/III/1> In producing chlorine dioxide by reacting nitrogen dioxide with a solid, soluble chlorate, e.g. of an alkali or alkaline earth metal such as sodium, potassium, lithium, or calcium, in divided form in the presence of moisture, the chlorate particles are disturbed, e.g. by continuous agitation, during the reaction. The chlorate may contain say less than 10 per cent of an inert solid, e.g. metal silicates such as diatomaceous earth, clay, or pumice, or refractory oxides such as silica.  The nitrogen dioxide should be mixed with a diluent gas, e.g. air, nitrogen, carbon dioxide, or oxygen, constituting at least say 90 per cent of the mixture and should contain moisture to a relative humidity of at least 30 per cent of the diluent gas at 25 DEG C or alternatively the nitrogen dioxide-diluent mixture may be produced by passing air through an electric arc.  The tower 10, which is divided into reservoir and reaction sections 34, 35, by perforated partition 32, is completely filled, including lower part 40 down to base partition 49, with chlorate which is agitated and fed slowly downwardly by stirring rods 20, 21, carried on motor driven shaft 18.  The nitrogen dioxide-containing gas is fed into the reaction section at 46 and chlorine dioxide-containing gas is withdrawn at 47 for co-current treatment and vice versa for counter current.  The reaction temperature is say 25-30 DEG C.  The spent chlorate is removed by feed screw 54 to receptacle 56.  Specifications 595,528, 653,622, [Group XXX], 663,239, and 675,541 are referred to.
Patent GB-953478-A (GB)
Title: Coded signal circuit
Inventor: MAJERUS JOHN BRUCE
IPC: G01S13/76
Filed: 1962-02-26
Abstract: 953,478. Pulse discriminating circuits; pulse radar; transponder apparatus. COLLINS RADIO CO. Feb. 26, 1962, No. 7447/62. Headings H3D, H4L and H4P. Relates to a circuit not affording an output pulse when an input pulse, of a train of pulses arising from transmission from an omnidirectional aerial (" control " pulse) and from a directional aerial (one or more " trigger " pulses), arrives from a side lobe of the directional aerial. According to the invention the circuit comprises delay means 22 affording a delay by a predetermined interval which is equal to the pulse spacing in a two-pulse system and which is equal to the spacing between the two directionally-radiated pulses in a three-pulse system, comparator means 26 fed from the delay means and fed with substantially undelayed circuitinput signals, and coincidence means 33 fed with the difference-output of the comparator means and fed with the output of the delay means whereby an output from the comparator means is precluded whenever the received signal includes a radiated pulse from a side lobe. In the embodiment, as applied to the reception of a control pulse followed by a trigger pulse, the received pulse train, Fig. 3a, is applied to a set of delay lines in cascade 22, Fig. 2, a delayed and pulse-stretched train, Fig. 3e, of adjustable amplitude appearing at the output of diode 44 for application to one input of a differential amplifier 26 to the other input of which there is applied, via a " spike eliminator " 31 and a cathode follower 30, the pulse train, Fig. 3d; the differential amplifier output is as shown in Fig. 3f and is applied to coincidence circuit 33 to the other input of which is applied the train, Fig. 3c, formed from the input, Fig. 3a, delayed by the inter-pulse interval. The coincidence circuit produces an output pulse, Fig. 3g, since there are simultaneous positive-going portions at the inputs thereto ; the output pulse initiates coded transponding. Fig. 1 (not shown). Fig. 4, a . . . g, shows that when the trigger pulse is of lower amplitude, due to side-lobe radiation, there is no output pulse. The circuit operation is explained when the input pulse train comprises (1) a control pulse followed by a pair of trigger pulses, Figs. 5 and 6 (neither shown), and (2) a control pulse between two trigger pulses, Figs. 7 and 8 (neither shown); in the latter case the network 28, the input to which is delayed, relative to the circuit input, by an interval equal to the interval between the control pulse and the adjacent trigger pulse plus the duration of the control pulse, is also coupled to differential amplifier 26.
Patent GB-380371-A (GB)
Title: Improvements in or relating to mechanical empty-load switches for brake devices of vehicles, especially railway cars
IPC: B61H13/32
Filed: 1932-03-14
Abstract: 380,371. Brake operating-mechanism. SVENSKA AKTIEBOLAGET BROMSREGULATOR, 5, Adelgatan, Malm÷, Sweden. March 14, 1932, No. 7536. Convention date, March 23, 1931. [Class 103 (i).] In brake mechanism for vehicles in which the leverage ratio is varied according to the loading of the vehicle by setting a pivoted abutment acting as a fulcrum for one of the levers in an operative or inoperative position, a switch device for setting the abutment comprises a spring connected thereto and to a crank pin on the operating shaft of the switch in such a manner that the line of action of the spring is thrown from one side to the other of the centre of rotation of the abutment when the shaft is operated. The spring thus acts to hold the shaft and abutment in either position and the shaft can be turned from one position to the other even though the brakes are applied and the abutment cannot move until the brakes are released. Fig. 1 shows the device embodied in a mechanism comprising levers 2, 3 pivoted respectively to the brake piston and to a fixed point and connected by a link 4. The lever 3 is connected by a slotted link 8 to a third lever 11 connected to the brakes by the pull rod 7. A link 12 connects the levers 2, 11. One or other of the levers 3, 11 is rendered effective to vary the leverage ratio according as the fulcrum of the lever 11 is operative or inoperative. This fulcrum is formed by a rod 14 slidable in a casing 16 of the switch device and adapted to engage an abutment 15 provided with side-pieces on which it pivots about the manual operating shaft 17 of the switch. A tensioned spring 23 is connected to a pin 20 on the abutment and to a crank pin 19 on the shaft. With the abutment in the operative position shown by the full lines, the spring holds the abutment and the crank pin 19 against stops 22 in the casing. When the brakes are applied the rod 14 engages the abutment and the lever 11 is thus effective. If the shaft is turned to bring the crank pin 19 against the upper stop 24 the spring acting on the other side of the axis of the shaft moves the abutment to the inoperative position shown in broken lines with the pin 20 engaging the stop 21. The abutment 15 is formed with a recess in its underside at 26 so that in the upper position the movement of the rod 14 is unimpeded by the abutment. The shaft may be turned while the brakes are applied and the abutment will then move to the corresponding position when the rod 14 is withdrawn by the release of the brakes. The spring 23 may be arranged to act in compression. The pivotal axis of the abutment need not be that of the shaft 17. The switch device may be used in arrangements in which the fulcrum of a single lever is changed.
Patent GB-550639-A (GB)
Title: Improvements in or relating to axles boxes
IPC: B60B27/00
Filed: 1942-06-04
Abstract: 550,639. Axle-box bearings. M.E. ENGINEERING, Ltd., and JUDELL, O. June 4, 1942, No. 7630. [Class 12 (i)] An axle-box comprises an undivided body 1, Figs 1, 2, with a slot 4 for the passage of the axle 6 and its components, the flanged bush 3 also having a slot 5 which is closed by a segment 7, the bush being rotated after insertion so as to close the slot 4. The bush flanges have a flattened portion engaged by a cover plate 12 to prevent further rotation of the bush. Plate 12 has overhanging side edges 13 acting as dust shields and flanged ends 14 to prevent deformation of the body 1. The body 1 is closed by a strap 15, elastic packing 16 preventing loss of lubricant through slot 5. With through axles, metal washers 20 and packing 21 are used, but with axle ends a thrust plate 19, Fig. 8, is used.
Patent GB-901002-A (GB)
Title: Improvements in domestic fire-back boilers
IPC: F24B1/183
Filed: 1960-03-04
Abstract: 901,002. Boilers for domestic fireplaces. CHEW, S. Feb. 8, 1961 [March 4, 1960], No. 7667/60. Class 126. A fire back boiler B in communication with hollow side cheeks A is provided with a plurality of inclined open flues b passing from the base of the boiler adjacent the front to a back flue a1, the water space of the boiler extending to the canopy of the fireplace. The lower part of the boiler has a forwardly-projecting, triangular section portion, the leading edge a4 of which lies below the normal level of fuel on the firebars. The base of the boiler or a part thereof is inclined so that the flues b are positioned at right-angles thereto. In a modification, Fig. 3 (not shown), a further water space in communication with the side cheeks is provided below and behind the fire grate. Water enters the boiler via a pipe b3 and leaves via a pipe b4. The fire draws air either.under the fire bars from the room, Fig. 3 (not shown), or, as shown in Figs. 1 and 2, through the damper-controlled under-floor duct C1 and the under-grate chamber c which is provided with an ash pan c1 A fret D may be included above the front of the grate to provide a support for fuel fed on to the forwardly-projecting portion of the boiler when an all-night fire is required. Alternatively a removable hopper may be hung on the fire-back to hold the reserve fuel. Horizontal and vertical flues a and a1 are provided below and behind the boiler leading to a chimney A2, the draught being controlled by a damper D3. A restrictor D2 with a recessed upper surface d is provided in the lower flue a to prevent ash passing through the flue a and to divert a portion of the combustion product into the inclined flues b. Specifications 756,488 and 901,000 are referred to.
Patent GB-483331-A (GB)
Title: High pressure steam power installations
IPC: F01B17/04
Filed: 1936-03-13
Abstract: 483,331. Turbines. MEIJER, W. M. March 13, 193G, No. 7682. Convention date, April 3, 1935. Drawings to Specification. [Class 110 (iii)] A turbine installation having water separating devices between the turbine cylinders or between stages operates with steam at such pressure, above 25 atmospheres, and superheat that the steam first becomes wet in the third sixth of the expansion range. Refenence has been directed by the Comptroller to " The Brown Boveri Review," January, 1930, pages 29 to 37.
Patent GB-1178613-A (GB)
Title: Improvements in or relating to devices for Detecting Inclination, in particular the Transverse Inclination of Railway Tracks
IPC: E01B35/02
Filed: 1967-02-17
Abstract: 1,178,613. Inclinometers. F. PLASSER. Feb.17, 1967 [March 24, 1966; Aug. 5, 1966], No. 7704/67. Heading G1N. An inclinometer, particularly for measuring the transverse inclination of railway tracks, comprises a pendulum 4, Fig. pivotally mounted on a spindle 3 which is provided with a pulley 6 at one end. Movement of the pendulum is transmitted via cords 9 to a pulley 21 attached to the spindle 23 of a potentiometer. In operation, the D.C. voltage across the potentiometer 25 Fig. 9 is compared with that across a manually adjustable potentiometer 39, where setting represents a degree inclination, the difference being indicated on meters 38<SP>1</SP> ,  38<SP>11</SP>.... at various locations. This difference signal may also be noted to control track laying machines. Switch 43 is provided so that the direction of the voltage drop across the potentiometer 25 may be altered dependent on the direction of deflection of the pendulum. To clamp oscillations of the pendulum or lock it when not in use, a member 18, Fig.3, is movable into the path of a projection 12 on the pendulum on automatic or manual energization of solenoid 13 whose core 15 carries the member 18 and which is spring biased out of the solenoid. The device is mounted on a support frame, which may be part of the track laying or maintanance machine.
Patent GB-122761-A (GB)
Title: Improvements in Radial-Flow Turbines.
IPC: F01D15/02
Filed: 1918-05-08
Abstract: 122,761. Brush Electrical Engineering Co., (Aktiebolaget Ljungstr÷ms Angturbin). May 8, 1918. Combined-flow type; motor power plant.-A radial-flow turbine b, b<1> of the single or double rotation type exhausts into one or more axial-flow turbines f, f<1> of the duplex-flow type mounted on the shafts c, c<1> of the radialflow turbine. The duplex flow in each axial-flow turbine may be towards instead of away from the centre. The radial-flow disks b, b<1> may carry also axialflow blade systems, as described in Specification 100,484.