baber/WOPTO huggingface dataset:
Patent GB-818828-A (GB)
Title: Process for bleaching cellulosic pulp
IPC: D21C9/10
Filed: 1957-06-11
Abstract: Cellulosic pulp, especially pulp of high density, is admixed with a hypochlorite bleaching solution under such conditions of duration and temperature that no substantial bleaching is caused, whereafter the temperature is immediately raised to effect bleaching and, at the desired degree of brightness, the bleaching is stopped by "drowning" the mass in water.  The bleach liquor may be distributed in the pulp at temperatures below 80 DEG  F.  The heating may be effected by the direct application of steam at temperatures of 140 DEG  to 212 DEG F.  The bleaching may be effected with sodium or calcium hypochlorite solution containing caustic soda.  An apparatus is described and contains storage chests, priming tanks, thickeners, a shredder, a mixing-tank, retention chambers and cold water dilution tanks through which the pulp passes sequentially.
Patent GB-1424219-A (GB)
Title: Fluid control valve
IPC: F16K11/044
Filed: 1973-04-17
Abstract: 1424219 Valves S KONDO 17 April 1973 [17 April 1972] 18447/73 Heading F2V In a solenoid-operated multi-way valve for controlling a piston and cylinder device, the spherical closure members 22a, 22b fixed to an operating rod 21, co-operate with resilient seat members 23b, 24b and 23a, 24a to connect an air pressure inlet passage 14 to either of two motor passages 15, 16 and to connect the other one of the motor passages to either exhaust passage 17 or 18. The seating members are all identical and are arranged together in reversed pairs located by a pin and hole arrangement (see Fig. 4, not shown). Each surface of the seat member has a semicircular groove which, together with the adjacent member, forms the fluid passageway connecting with the passageways in the body. At each end of the stack of seat members is a resilient support member 25 in which the operating rod 21 moves axially with freedom to move radially as well, as dictated by the contacts between the balls and the resilient seat members. The seat members and the support members are compressed by a cover member 30, fixed by screws 31 to the body 12, so that they make close contact with the inside of the body. The seat members and the support members are moulded from a self-lubricating resilient material. In another embodiment (Fig. 6, not shown) the resilient seating members (41), (42), (43) are in one piece and are held in place by metal spacing rings (44), (45). The seat members and spacing members are each provided with a port in alignment with one of the flow passages 14-18. The closure members may alternatively be of cylindrical shape with either rounded edges cooperating with tapered seat surfaces or tapered edges co-operating with circular edges on the seats.
Patent GB-162970-A (GB)
Title: Improvements in devices for holding boots during cleaning and polishing
IPC: A47L23/16
Filed: 1920-07-03
Abstract: 162,970. Malfatti, G. P. July 3, 1920. Trees.-A device for holding boots during cleaning and polishing consists of a wall bracket a, a leg piece c with a pivoted back piece adjustable by a screw e, and a pivoted foot part d.
Patent GB-487982-A (GB)
Title: Improvements in or relating to short-time switches operating with the aid of controlled current converters
IPC: H03K17/288
Filed: 1937-07-02
Abstract: 487,982. Valve circuits ; control systems for resistance welding. SIEMENSSCHUCKERTWERKE AKT.-GES. July 2, 1937, No. 18495. Convention date, July 2, 1936. [Class 40 (v)] [Also in Group XXXV] A controlled current converter of the gridcontrolled mercury vapour type is ignited by applying to its control grid a gradually increasing positive potential derived from the charging or discharging of a condenser and superimposing thereon an A.C. potential of pointed wave-form. Fig. 1 shows a short-time switching arrangement for spot or seam welding apparatus, in which the current from D.C. mains 1 is applied across two grid-controlled mercury vapour tubes 3, 5 through a switch 2. The grid bias of the auxiliary valve 3 comprises a fixed source on which is impressed an A.C. potential of pointed wave-form from transformer 6. When the switch 2 is closed valve 3 is energized and a voltage is built up across resistance 4 in the work circuit. The grid circuit of the main discharge tube 5 comprises biassing resistance 7, condenser 8, charged from source 1 through variable resistance 10, and a source 9 of A.C. potential of pointed wave-form. As soon as switch 2 is closed condenser 8 becomes charged up ; when its voltage added to the voltage peaks from 9 exceeds the required ignition voltage (e.g. in 3 cycles) tube 5 strikes and short circuits resistance 4 to remove effectively the voltage applied to the work circuit. If the source 9 were not provided, the time taken for tube 5 to strike would vary with different tubes used in the circuit, due to slight variation of ignition-voltage characteristic ; the provision of source 9 ensures that ignition takes place at exactly the same time interval from rest even with variations of + 2 volts in the tube ignition voltage.
Patent GB-829227-A (GB)
Title: Improvements relating to lubricating oil injectors for petrol engines
IPC: F16N27/00
Filed: 1957-06-12
Abstract: 829,227. Lubricating. FRANTSEVITCH, V. June 12, 1957 [July 30, 1956], No. 18573/57. Class 12 (3). Lubricant is drawn into the induction manifold of an internal combustion engine, on starting, through a cylinder 1 containing a free piston 5 and ball valve 3, the upper end A of the cylinder 1 being connected to the induction manifold and the lower end B being connected to a source of lubricant. A depression in the manifold causes the piston 5 and ball 3 to rise in the cylinder 1 expelling a quantity of lubricant located above the piston 5 and drawing into the cylinder 1 a fresh quantity of lubricant beneath the piston 5. When the piston 5 reaches the top of the cylinder 1, a truncated portion 6 co-operates with a tapered portion 4 of the cylinder body and cuts off the communication with the outlet A. This causes the ball 3 to fall and close the inlet and the piston 3 slowly descends, oil then being transferred from the inlet to the outlet side of the piston 3. Grooves 8 are provided in the side of the piston. In a modification, the ball 3 is spring-pressed into engagement with the valve seat. In a further modification, a piston 5, Fig. 5, comprises discs 14 connected by a central portion 13, inclined slots 8 being provided in the discs to cause rotation of the piston as it descends. The valve 3 comprises a body of hexagonal section having a conical valve portion on its lower side and a pin 12, for co-operation with the piston 5 to prevent sticking, on its upper side.
Patent GB-1011668-A (GB)
Title: Improvements in or relating to pressure exchanger plant
Inventor: BARNES JOHN ANTHONY
IPC: E21F1/00
Filed: 1963-05-10
Abstract: 1,011,668. Pressure exchangers. POWER JETS (RESEARCH & DEVELOPMENT) Ltd. May 7, 1964 [May 10, 1963], No. 18619/63. Addition to 913,466. Heading F1N. A pressure exchanger plant as claimed in parent Specification for producing an output of fluid at a temperature lower than that of any of the fluids supplied to the plant, is modified by incorporating in the plant a further pressure equalizer. As shown, the pressure equalizers are in the form of injectors 3, 11. In operation compressed air from a line 1 passes through a high pressure inlet port 5 in the injector 3, thereby entraining ambient air through an inlet duct 6. The mixed air issues from a port 10 forming the inlet to the second injector 11 thereby entraining further air from a duct 34 connected via the hot pass 29 of a contra-flow heat exchanger 30 to a high pressure outlet port 25 of the pressure exchanger 15. The pressure exchanger has a high pressure inlet port 24 which receives the air supplied from the injectors 3, 11, a low pressure inlet port 20 which draws warm air from the atmosphere and a low pressure outlet port 21 which discharges the cooled air.
Patent GB-116657-A (GB)
Title: Improvements in or relating to the Joining of Metals.
Inventor: KOHLER CONRAD
IPC: B23K23/00
Filed: 1917-12-15
Abstract: 116,657. Kohler, C. Dec. 15, 1917 Moulds. - Before joining one metal such as copper to another of higher melting point such as iron, the surface of the latter is prepared by fusing on, by means of a reducing flame, a coating of metal of a lower melting-point, for instance the same metal as that to be joined to it. In casting, a stream of the first metal is allowed to flow over the coated surface long enough to melt it. The metal may be merely cast on to the coated piece, or a bar 13 of copper may be arranged adjacent to the coppered end 12 of the iron bar 11, and joined to it by pouring molten copper between them and allowing it to flow out of the vents 15, 16 for some time.
Patent GB-578574-A (GB)
Title: Improvements in caps for the cores of paper rolls and the like
IPC: B65H75/18
Filed: 1944-09-29
Abstract: 578,574. Paper rolls. DALEY, S. N. Sept. 29, 1944, No. 18724. [Class 100 (i)] [Also in Groups XVII and XXIII] A core cap 5 for paper rolls has an outwardly directed core engaging flange 6, of greater diameter than the core A, so as to give visual indication of the approach of the end of the roll, and an inwardly directed flange 7, adapted to be engaged by the jaw parts D, of an extracting tool B, comprising crossed handles C. Slots 8 render the cap resilient.
Patent GB-359377-A (GB)
Title: Improvements in and relating to valves for pneumatic devices
IPC: F16K15/20
Filed: 1931-06-29
Abstract: 359,377. Inflating valves. T O M P - KINS, E. E., 8, Dreycott Lane, Haverford, Pennsylvania, U.S.A. June 29, 1931, No. 18725. Convention date, July 2, 1930. [Class 135.] An inflating valve for play balls, air cushions, life preservers &c. comprises a flexible tube adapted to be rolled upon itself to form a seal receivable by an envelope portion of the tube thereby to maintain the seal. The valve is moulded in the form shown in Fig. 7, the envelope portion 13 being of larger diameter than the rest of the tube and arranged adjacent a disc portion 10 which tapers to a thin edge. The tube is then passed through the hole 14 and the disc secured to the outer surface of the pneumatic device 11. After inflation the tube is rolled up and passed back through the hole 14 where the part 13 resumes its original position and holds the tube in its rolled-up condition as shown in Fig. 4.
Patent GB-379799-A (GB)
Title: Improvements relating to the recovery of tobacco from waste or faulty cigarettes
IPC: A24C5/36
Filed: 1931-06-29
Abstract: 379,799. Cigarette-making machines. WIX, M., 34, Ravenscroft Avenue, Golder's Green, London. June 29, 1931, No. 18796. [Class 130.] Tobacco is separated from waste cigarette papers by introducing them into a rotary drum 1 having a wall 2 of wire mesh and in which are agitating paddles 5 fixed to a shaft 4 which extends through and is rotated in an opposite direction to the rotation of the drum. Spikes 9 are fixed to the walls of the drum and are arranged between the successive paddles which are disposed in staggered formation.
Patent GB-742089-A (GB)
Title: Improvements in or relating to composite fabrics suitable for absorbent dressings
IPC: A61L15/16
Filed: 1953-07-07
Abstract: An absorbent dressing or sanitary napkin comprises an absorbent pad covered with a compound sheet material comprising a tenuous web of textile fibres brought into face-to-face relation with a woven gauze, and an adhesive binder applied to discrete areas of the exposed surface of the web to bind it to the gauze (see Group VIII).
Patent GB-1478235-A (GB)
Title: Method of manufacturing an electric timepiece and electric timepieces manufactured thereby
IPC: H01L23/50
Filed: 1975-05-06
Abstract: 1478235 Unitary metallic circuits EBAUCHES SA 6 May 1975 [24 May 1974] 18859/75 Heading H1R [Also in Division G3] A metal sheet 1 is cut to form a number of elements la and then overmoulded with plastics material 2 which acts as a support, some of the elements 1a forming circuit connections in an electric timepiece and some forming mechanical elements of the timepiece movement. Retaining elements 1b, c of the sheet are cut away after moulding. Before moulding, electric connections 4 and discrete electronic components 3, integrated circuits or thick or thin film circuits may be attached to elements 1a. As described the moulded sheet forms a movement bottom plate and a frame element 6 is formed by a second moulding operation in an aperture 5 in the first moulding. The mechanical elements may comprise bearings, a balance flirt, and return springs.
Patent GB-1361770-A (GB)
Title: Conductively cell
IPC: G01N27/06
Filed: 1973-04-19
Abstract: 1361770 Particle analysis GENERAL SCIENCE CORP 19 April 1973 [27 April 1972] 19008/73 Heading G1N In particle analysis apparatus with venting to eliminate gas bubbles e.g. as described in Specification 1305697, a bubble chamber is provided on the inlet side of the aperture to collect gas present in the liquid. A valve, by-passing the aperture, is provided to purge the bubble chamber and prime the cell. A further controlled vent is provided for back-flushing the aperture. As illustrated diagramatically in Fig. 5, an aperture plate 68 is mounted in a cylindrical plug 64 inserted in the cell body to align with an outlet 75 from the bubble chamber 76. This chamber is mounted above the inlet pipe 74 and connected via a bore 96 and plunger valve 100. When the plunger is depressed as illustrated in Fig. 6 (not shown) channels 119 bridge its lower seal 117 to connect to vacuum and purge the cell. Further, a magnet valve (44) (not shown) when open allows air to be sucked through bore 48 to back-flush the aperture. Details (i) The electrodes may be formed by bubble chamber walls 86, and outlet pipe 92 connected to leads 90, 94.  (ii) A construction of this cell in a translucent plastic block is described with reference to Figs. 2-4 (not shown) using the same part numbers. (iii) In a generally similar construction Figs. 8, 9 (not shown) the aperture plate is mounted axially so that the end of its mounting plug can be polished as a magnifying lens (200) for viewing the aperture. (iv) The basic cell current may be maintained constant at a reference value Fig. 10 (not shown). (v) Electrodes (50), Fig. 1 (not shown) may be provided in the waste bottle to indicate when it is full. (vi) The cycle of operations may be directed by a controller labelled "logic circuitry" Fig. 1 (not shown). This system of Fig. 1 is described in U.S.A. Specification 3657725.
Patent GB-597090-A (GB)
Title: Improvements in and relating to continuous feed kinematographic apparatus
IPC: G03B41/08
Filed: 1944-10-04
Abstract: 597,090. Kinematograph apparatus. MAYTUM, J. A., and SMITH, L. Oct. 4, 1944, No. 19036. [Class 97 (i)] Continuous feed apparatus includes a square section compensating prism surrounded by a shutter rotating therewith and enclosing its corners so as to confine the scanning of the light-beam by the prism to one facet at a time. In the projector shown in Figs. 2 and 3, a casing 34 contains the compensating prism 21 and a concentric feed sprocket 26. The prism 21 is enclosed between four shutter blades 23 driven from the main shaft 10. One margin of the film is driven by the sprocket. The other runs on a member 66 on a bearing 65. The film is held in place by a pressure member 45. The sprocket is driven at one quarter the speed of the prism by an epicyclic friction drive consisting of a sun-wheel 27 on shaft 10 and planets 28 rotating on spindles 30 carried on the sprocket and running in an outer race 29. To maintain the timing of the projector, the members 27 and 29 and one of the planets 28 are provided with toothed gearing. The member 45 has a projection aperture which may be longer than a single frame. In this case there is provided a frusto-conical shutter 50 with blades 51 arranged to prevent light from more than one frame of the film reaching the prism 21 at any time. This shutter is driven at the same speed as the film sprocket by bevel gears 54, 55 and spur gears 56, 57. The bevel-wheel 55 is attached to the bush 58 secured to the ends of the shutter blades 23. A fly-wheel 73 is provided on the shaft 10 and pulleys 13, 14 carry belts for the drive from a motor and to the take-up film spool. One element 43 of the objective lens combination is placed between the film and the compensating prism. In the camera shown in Fig. 12, the compensating and film feed arrangements are similar to those in the projector. A shutter 79 driven by mitre wheels 82, 83 has radial exposure slots. A fixed mask 78 surrounding the prism has diametrically opposite slots to pass the light beam.
Patent GB-481592-A (GB)
Title: Improvements in and relating to cathode ray apparatus
IPC: G02F1/03
Filed: 1936-07-09
Abstract: 481,592. Television ; cathode ray tubes. TOULON, P. M. G. July 9, 1936, No. 19063. Convention date, May 15, 1936. [A Specification was laid open to inspection under Sect. 91 of the Acts, Jan. 11, 1937.] [Classes 39 (i) and 40 (iii)] In a television receiver a cathode-ray tube has a device, exterior to the tube, for modulating light from a local source in dependence on the scanning modulation of the cathode beam, the elements of the device being controlled electrostatically by a grid-like assembly of insulated electrodes which are arranged outside the tube and are charged inductively by the beam, the charges on the electrodes being discharged between successive scannings. As shown, the device consists of a leaf 15 of silvered colloidion suspended on a flat wire-meshed frame 16, so as to form elements reflecting light from a source 10 to an objective 19, the centres of the elements being blackened. The electrodes 22 are mounted on the outer surface of the tube so as to be charged by charges set up on the inner surface by the beam. Charges on the electrodes cause the elements to bend so that light is reflected away from the objective. The leakage paths between the electrodes allows them to be discharged to an earthed guard-ring 23 between successive scannings. The reflecting device 15 is maintained at a high potential, and an earthed screening grid 24 is interposed between it and a lens 18 for protection against parasitic charges. Specifications 376,498 and 445,106 are referred to. The Specification as open to inspection under Sect. 91 comprises also an arrangement in which an electron-optical system is mounted inside the cathode-ray tube, the light-reflecting electrodes 7, Fig. 1a (Cancelled), being mounted on insulating material 6 such as nitrobenzene, the optical properties of which vary with the electric field. A grid 5 is mounted on the other side of the insulating material 6. Light polarized by a Nicol system is directed into the electron-optical system and the reflected light is passed through another Nicol system. In otherarrangements use is made of (a) the orientation of colloidal particles in a liquid, for example, particles of graphite in oil, or a colloidal solution of herapathite ; (b) variations of the refractive index of a material under the action of an electrostatic field ; or (c) interference resulting from partial reflection from the front and rear faces of a material. In an image intensifier, Fig. 3 (Cancelled), a cathode 25 having cellular photoelectric elements is illuminated through an objective 26, and the tube has a number of cylindrical electrodes 27 forming an electron lens producing an electron image on the system 3 modulating light from a source 33. This subject-matter does not appear in the Specification as accepted.
Patent GB-122671-A (GB)
Title: A Machine or Apparatus for Brushing Metal Foundation Bands for Solid Rubber Tyres.
IPC: B29D30/02
Filed: 1917-12-27
Abstract: 122,671. Ajax Engineering Co., and Cox, J. Dec. 27, 1917. Cleaning.-In an apparatus for brushing metal foundation bands for solid rubber tyres, the band d is mounted on a series of rollers a, b, c two of which are positively driven so as to rotate the band, rotary brushes k being pressed against both inner and outer surfaces of the band by means of weights or their equivalent. The rollers a, b, c are mounted on slides which are geared so that they may be moved towards or away from each other by the operation of a single shaft. The slides l carrying the brushes k are moved out of their operative positions by blocks o mounted on a hand-operated screwed spindle n. The brushes k may be positively driven from a spindle q which may also drive the rollers b, c.
Patent GB-1047524-A (GB)
Title: Improvements in circuits for energising current or voltage responsive devices
Inventor: HUTCHINS ROY
IPC: H01H47/32
Filed: 1962-05-17
Abstract: 1,047,524. Transistor switching circuits. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. May 2, 1963 [May 17, 1962], No. 19106/62. Heading H3T. A fail safe switching circuit comprises a D.C. operated load such as relay RL connected in parallel with diode D between one or other pole of the supply source and (through a capacitor) to the junction of two transistors connected across the source. An input signal applied to the transistors causes the transistors to become conducting alternately, so charging and discharging the capacitor. The charging current is by-passed from the load by the diode but the discharge current flows in pulses through the load to cause it to operate. Failure due to open-circuit or short-circuit of the transistors prevents the load from being energized as also does failure of the capacitor, the diode being so poled as to by-pass short-circuit current from the supply through the capacitor. The Specification also describes known circuits in which transistor 2 is replaced by a resistor (Figs. 1 and 2, not shown).
Patent GB-299000-A (GB)
Title: Improvements in or relating to apparatus for use in making and repairing roads and the like
IPC: E01C19/10
Filed: 1927-07-19
Abstract: 299,000. Johnston, J. T. M. July 19, 1927. Cauldrons; tar macadam, plant for making. - Vehicular apparatus for drying sand or stone chippings and mixing the same with tar for light repairing operations, such as patching, comprises a mixer 40 situated in the upper part of the apparatus between a receptacle 10 for the grit at one end and the cauldron 4 for the tar at the other end. Further, a return flue 30 is provided within the cauldron to lead the furnace gases from beneath the receptacle 10 and cauldron 4 to a space 32 arranged below and around the mixer and connected to an uptake 34. The cauldron shown is that described in Specification 285,567, the flue tubes 30, leading from a smoke-box 28, constituting a pre-melting grid. A damper 48 allows the furnace gases to pass directly to the uptake if desired. The mixer has a semi-cylindrical bottom projecting into the space 32 and is provided with rotary stirring blades. The grit receptacle is preferably divided by a partition 16 into separate compartments having removable covers 17, one compartment being used for drying the grit, and the other for heating it.
Patent GB-349807-A (GB)
Title: Steering device in children's wheeled toys
IPC: A63H17/395
Filed: 1930-06-24
Abstract: 349,807. Mechanical toys ; boats. RICHTER, J., 1, Havelstrasse, Brandenburg-on-Havel, Germany. June 24, 1930, No. 19208. [Class 132 (iii).] In a wheeled toy or boat propelled by clockwork and steered under the control of a cam driven by the clockwork, the cam 6, Fig. 3, is constructed as a hollow cylinder coaxial with the driving axle 1, Fig. 1, of the clockwork and rotating therewith, the cam surface being provided on the edge of the cylinder. The cam is mounted on the main driving wheel 4, rigid with a spring drum 2, and is connected by means of a spring-retracted slide 7 to the cranked upper end 12 of a fork 14, Fig. 2, carrying the steering wheel 15.