baber/WOPTO huggingface dataset:
Patent GB-791858-A (GB)
Title: Improvements in and relating to the wet screening of solid particles and apparatus therefor
IPC: B07B1/00
Filed: 1955-02-03
Abstract: The invention of Specification 791,520 is modified by the provision of a flat screening deck instead of a curved one.  The present Specification includes Figures corresponding to all those (except 9 and 16 to 18) of the above Specification, appropriately modified: embodiments corresponding to those depicted in Figs. 9 and 16 to 18 of the above Specification are omitted.  The screening deck may be horizontal or, preferably, inclined, and in the latter case the bars are preferably horizontal.  Specification 667,128 also is referred to.
Patent GB-427993-A (GB)
Title: Improvements in or relating to packing rings for pistons, stuffing boxes and the like
IPC: F16J15/26
Filed: 1934-01-31
Abstract: 427,993. Packing - rings. SKODA WORKS, PLZEN, 37N, Jungmannova, Prague. Jan. 31, 1934, No. 3265. Convention date, April 21, 1933. [Classes 122 (i) and 122 (v)] A self-lubricating packing-ring for pistons and stuffing-boxes comprises one or more resilient rings of carbon or graphite (3, Fig. 3 ; 7 and 8, Fig. 2) carried in a recess in a metallic resilient support (9, Fig. 3 ; 10, Fig. 2). The metallic support is at least equal or approximately equal in width to the carbon or graphite rings so as to obtain a uniform distribution of stress therein and the carbon or graphite rings project above the metal support to contact with the corresponding machine part to enable continuous operation without oil lubrication. The composite ring may be split by a single cut to provide resilience.
Patent GB-577117-A (GB)
Title: Improvements in and relating to fertilizers
IPC: C05D3/02
Filed: 1944-02-22
Abstract: 577,117. Fertilizers. CLOKE, G. L. Feb. 22, 1944, No. 3272. [Class 111] A fertilizer comprises a hydrated chalk, i.e., a moist naturally occurring calcium carbonate or hydrocalcite, and 5-25 per cent. (by weight of the chalk) of quicklime, of which at least a portion is hydrated by the moisture present. The materials are mixed, passed through a claw breaker to a disintegrator and screened to the desired fineness. Alternatively the materials may be screened before crushing, and the chalk may, if desired, be washed initially. In a modification anhydrous chalk is mixed in the quicklime. with addition of water.
Patent GB-1499415-A (GB)
Title: Nuclear reactor installation
IPC: G21D3/04
Filed: 1975-01-24
Abstract: 1499415 Nuclear reactor installations KRAFTWERK UNION AG 24 Jan 1975 [25 Jan 1974] 3295/75 Heading G6C A nuclear reactor installation includes a steam outlet conduit 5 which extends, by way of a lead-through 6, through the wall of a safety container of the reactor, the conduit 5 being of double-wall construction in the region where it penetrates the container, a first steam valve 8 in the conduit 5 and connected on the outside of the container without there being between the double-walled conduit 5 and the valve housing 7 any tubing as thin as the inner wall of the double-walled conduit 5, and a second valve 10 connected directly to the first valve 8 without there being between the two any tubing as thin as the inner wall of the double-walled conduit 5. The safety container, which encloses a pressurized water reactor and heat-exchangers, comprises an inner steel shell 1 for withstanding the internal pressure and an outer, protective concrete wall 4. The double-wall construction of the conduit 5 ensures that, in any case of fracture of the inner wall, radioactive fluid is conducted back into the steel shell 1. The first valve 8 is disposed at an elbow joint between the conduit portions 5, 13, and is adjoined by a second, safety valve 10 and a third, blow-off valve 12 connected by a conduit 11 to a starting control valve 14. In the event of closure of the first valve 8 to prevent egress of contaminated steam from a fracture in the conduit portion 13, the second, safety valve 10 protects the double-wall portion 5 of the conduit from excessive pressure, whilst, if the steam is not contaminated, pressure of any level can be released via the third blow-off valve 12. The valves 8, 10, 12 are disposed in a valve chamber 15.
Patent GB-432650-A (GB)
Title: Improvements relating to spot light projectors
IPC: F02B19/00
Filed: 1934-02-01
Abstract: 432,650. Optical-projection apparatus. LEWIS, W. T., 1, Victoria Avenue, Sheppey Place, Gravesend, Kent. Feb. 1, 1934, No. 3383. [Class 97 (i)] [See also Group XI] An apparatus for enabling a kinematograph projector to be used as a spot-light projector comprises a condenser lens A vertically mounted and adjustable on a slotted bar B which is adjustably attached to a slotted bracket C carried adjustably on the body of the projector. In using the apparatus the projecting lens system of the kinematograph projector is swung out of its operative position and the condenser lens A is swung up into the vacated position, the various adjustments of the mounting arrangements permitting the beam to be directed in any desired direction vertically or laterally. A colour screen J may be supported in front of the condenser lens, and an apertured masking plate is inserted in a position normally occupied by the film to control the area and shape of the beam.
Patent GB-1510592-A (GB)
Title: Filter by-pass system for a servomotor
IPC: B60T13/56
Filed: 1976-01-29
Abstract: 1510592 Fluid-pressure servomotor systems BENDIX CORP 29 Jan 1976 [19 Feb 1975] 03568/76 Heading G3P [Also in Division F2 A filter element 102 is distorted to provide a by-pass passage round it when the load excepts a predetermined value in a push-rod 56 which actuates a control valve of a vacuum booster to displace a movable wall 34 therein. The push-rod comprises two parts 84, 72, (Fig. 2) with a pin 78 and slot 78 connection and a resilient conical washer 88 to urge the end 90 of one part from a flange 80 of the other. Secured to the washer 88 are bent arms 98 which engage the periphery of the filter element 102. Normally the arms are splayed permitting the filter element 102 to close a surrounding passage 100 within the hub 36 of the booster and on light braking air enters the chamber 40 through two filter elements 106 and 102. On heavy braking the washer 88 is flattened causing the arms 98 to squash the element 102 allowing air from the filter element 106 to by-pass the elements 102.
Patent GB-305237-A (GB)
IPC: C08G8/00
Filed: 1929-02-02
Abstract: 305,237. Bakelite Ges. Feb. 3, 1928, [Convention date]. Phenol-aldehyde condensation products.- Phenol-aldehyde resins, which may contain the usual organic or inorganic fillers and which may be mixed with other natural or artificial resins such as colophony, copal, coumarone resin, or " Novolak," with dyes, fire-resisting materials, &c., are hardened and deodorized by incorporating such compounds of alkali, alkali-earth, or heavy metals, as combine with the free phenol and uncombined by-products. The metal compounds mentioned are calcium, magnesium, iron, and zinc oxides, hydroxides, or salts with volatile or non- volatile acids such as fatty, oleic, and resin acids, calcium stearate, and zinc oleate being mentioned. The phenol-aldehyde initial condensation product may be mixed in the solid, liquid, or dissolved form with the metal compound, the other additional materials when employed being added at any stage. The metal compound may be added as a solution or emulsion, and is thoroughly dispersed in the resin, the quantity added being for instance 0.5 to 10 per cent. The mixture is finally worked up in the usual manner, the thermal and electrical properties being improved. A slight excess only of the metal compound may be employed, calculated by the fraction of bromine-combining constituents found by the bromometric method of Koppeschaar.
Patent GB-1462332-A (GB)
Title: Production of aluminium by electrolysis with control of thick ness of lateral ledges in a cell
IPC: C25C3/20
Filed: 1975-01-28
Abstract: 1462332 Fused electrolyte production of aluminium SWISS ALUMINIUM Ltd 28 Jan 1975 [30 Jan 1974] 3598/75 Heading C7B  In producing Al by electrolysis of Al 2 O 3  dissolved in a fluoride melt e.g. cryolite in a cell, the thickness of the lateral ledges (24), Fig. (not shown), of frozen electrolyte in the cell are controlled by (a) calculating at regular intervals e.g. between 2 secs and 5 mins, while the cell has no anode effects and no working operations influencing the cell resistance are being carried out, the instantaneous (ohmic) cell resistance, smoothing these values over a period e.g. between 1 min and 1 hour, and calculating the difference #R between this smoothed cell resistance and the base resistance established for the cell; (b) raising or lowering the anode beam (21) whenever #R exceeds a limiting value e.g. 0À5 microhms given for each cell to match the existing resistance with the base resistance; (c) reading the level of the anode beam by a level indicator e.g. potentiometer and storing; (d) at successive intervals not exceeding one day repeating steps (a) and (b) and reading the level of the anode beam as in (c); (e) calculating a difference #B from each two levels of the anode beam determined, corrected for changes of level due to tapping or metal addition; and (f) after each step (e) carrying out one or more known procedures, if necessary, which tend to bring back the thickness of the lateral ledges (24) to the preferred value such that areas of electrode surfaces are equal, depending on the sign and magnitude of the corrected #B value: e.g. changing the interpolar distance (d) or current, to charge the electric power of the cell, height of metal on cell bottom or of Al 2 O 3  layer (23) on the crust of frozen electrolyte above the melt or on the anodes, to charge the heat losses of the cell, the number of crust breakings per day, and/or the composition of the melt e.g. the concentration of electrolyte additives AlF 3 , LiF, CaF 2 , MgF 2 , NaCl. The calculations, and storing, may be effected by computer. The cell insulation (13) may be of chamotte. The carbon anodes (18) may be selfbaking, renewed by pouring green electrode paste into a steel jacket, or pre-baked; iron cathode bars (17) may be used.
Patent GB-497893-A (GB)
Title: Improvements in or relating to sewing machines and the like
IPC: D05B21/00
Filed: 1938-02-04
Abstract: 497,893. Sewing-machines. TILLETT, F. G. Feb. 4, 1938, No. 3635. Drawings to Specification. [Class 112] The description and drawings are the same as those of Specification 497,894, and a fluidpressure-operated device for automatically stopping the machine with the needle clear of the work is claimed. Control of a driving clutch and of a thread-tension release in combination with the stopping device are also claimed. Specifications 354,320 and 422,483 also are referred to.
Patent GB-828676-A (GB)
Title: A flexible connecting tube for conveyor pipes
Inventor: KATSUHARA HIDEO
IPC: F16L51/02
Filed: 1958-02-04
Abstract: 828,676. Flexible pipes. ONODA CEMENT CO. Ltd. Feb. 4, 1958, No. 3643/58. Class 99(2). A flexible tube 1, Fig. 1, for connecting conveyer pipes 9,10, is made of a waterproof material e.g. rubber, textile or synthetic resin, in corrugated form. Each corrugation may or may not be reinforced with cloth pieces 4, 5, Fig. 4, and may also have a reinforcing ring 3 attached. Reinforcing ropes 2 are fitted through eyelets 6 and are attached to the pipes 9 and 10 which are fitted to the ends of the tube and secured by fastening bands 8. One of the pipes is fitted with a guide 7 for the end portion of the tube.
Patent GB-1451530-A (GB)
Title: Catalytic converter with exhaust gas modulating chamber for preventing damage to catalyst substrate
IPC: F01N3/24
Filed: 1974-01-28
Abstract: 1451530 Catalytic exhaust gas converter U O P Inc 28 Jan 1974 [29 Jan 1973] 03752/74 Heading B1F A catalytic converter for treating exhaust gases from an internal-combustion engine comprises a metal housing including gas inlet and outlet fittings and a porous, catalyst-coated ceramic element therein, there being provided at least one perforated metal inlet screen positioned intermediate said inlet fitting and said ceramic element and a spacer element also positioned intermediate said inlet fitting and said ceramic element, said spacer element having a higher temperature coefficient of expansion than said metal housing and said housing having a higher temperature coefficient of expansion than said ceramic element whereby, in use of the converter, the relative shrinkage of said ceramic element relative to said housing during heating will be at least partially offset by the relative expansion of said spacer element relative to said housing. As shown a converter comprises a "honeycomb" ceramic catalystcoated element 24 mounted in a housing 12 spaced therefrom by ceramic-wool rings 34 Two dome-shaped metal screens 42, 44 are provided; screen 44 abuts shoulder 36 at one end of the converter, screen 42 is separated therefrom by ring 46 and is free to move axially. Ring 46 has a higher coefficient of expansion than the housing or the ceramic element, and the housing a higher coefficient than the element, so that as the converter heats up, the element shrinks with respect to the housing but the ring expands, thus reducing or eliminating axial movement of the element.
Patent GB-413044-A (GB)
Title: Improvements in and relating to captive bolt projectile devices
IPC: A22B3/02
Filed: 1933-02-08
Abstract: 413,044. Slaughtering for food. COX, P., 5, Lychett Road, Bromley, Kent. Feb. 8, 1933, No. 3914. [Class 28 (ii).] In an explosive-operated, captivebolt slaughtering-appliance, the end of the bolt D is flared to produce a hole in the skull sufficiently large to ensure easy extraction of the bolt. The appliance comprises a barrel B to which is screwed an enlarged muzzle part C and the breech piece A. The barrel is mounted for limited rotational movement in a sleeve E. This movement uncovers the cartridge opening and enables the spent cartridge to be removed, an ejector preferably being provided. When a new cartridge is inserted, the barrel is rotated back until the projection A<1> prevents further rotation, a spring- mounted pin K ensuring that the cartridge is accurately aligned with the firing-pin. The barrel is recessed at 7 to receive solid residues from the explosions swept back by the enlargement 6 of the bolt D. The enlargement 6 has sufficient clearance in the barrel to allow explosion gases to pass and escape through the clearances 12, 16 between the bolt and the apertures in the end wall 11 and a sliding washer 13 which may be made of the material known by the Registered Trade Mark " Bakelite." A rubber buffer 4 is positioned between the wall 11 and the washer 13 and has sufficient clearance to permit the gases to pass between the outlets 12, 16. The bolt may be a sliding fit in the wall 11 and washer 13 in which case slots or passages for the explosion gases are provided adjacent to the guide holes, the bolt is made in two parts, the forward part being screwed into the rear part comprising the enlargement 6 and the rear combustion chamber end 2. Holes 18 permit the passage of air around the buffer 4. A number of interchangeable distance pieces J of various lengths are provided to space the device correctly from the animal's head. A number of projections 19 formed by burring are provided on the bolt to engage the breech piece A, the frictional hold maintaining the bolt in its retracted position. Markings 51 on the bolt indicate whether the bolt is fully retracted for firing.
Patent GB-704975-A (GB)
Title: Improvements in or relating to quartz crystal units
Inventor: FULLER DENNIS QUINTRELL
IPC: H03H3/02
Filed: 1951-02-19
Abstract: 704,975. Piezo-electric crystals. PYE, Ltd. March 5, 1952 [Feb. 19, 1951], No. 3970/51. Class 40 (8) A quartz crystal 1 having conducting electrodes 2 formed on both surfaces is secured to an insulating plate 4 provided with contacts 5 by applying a conducting paste between the contacts 5 and the electrodes 2 and hardening the paste so that it forms conducting supports. The paste may be made of a silver compound mixed with a reducing agent. It is applied to holes 7 a the ends of contacts 5 and is baked to harden it. The contacts 5 may be made of silver paste. Two of the units shown in Fig. 4a may be mounted back to back in a glass envelope.
Patent GB-537934-A (GB)
Title: Improvements in or relating to hack saw frames
IPC: B23D51/12
Filed: 1940-03-05
Abstract: 537,934. Hack-saws. WATTS (SHEFFIELD & LONDON), Ltd., J., and EDWARDS, T. H. March 5, 1940, No. 4111. [Class 61 (ii)] An adjustable hack saw frame comprises a part 10 slidable in a tubular portion 11 of the part carrying the handle 20 and locked in adjusted position by a pin 24 carried by a pivoted arm 22 adapted to engage one of a series of holes 21 in the frame part 10, the pin being inclined so that the reaction resulting from the blade tension forces the arm downwards.
Patent GB-726333-A (GB)
Title: Improvements in and relating to image intensification apparatus
IPC: H01J31/54
Filed: 1953-02-16
Abstract: 726,333. Cathode-ray tubes. GENERAL ELECTRIC CO. Feb. 16, 1953 [Feb. 16, 1952], No. 4253/53. Class 39 (1). An image intensifier comprises means for generating a defocused electron beam along an axis, an X-ray responsive phosphor for converting X-ray images into light images, a photo-conductor adjacent the phosphor for receiving electrons from the beam and transforming the light images into reversely corresponding charge images, and an electronpermeable element positioned between the source of the beam and the photo-conductor and having an electron responsive phosphor on the side opposite the source of the beam whereby electrons in the beam pass through the electron-permeable element and are reflected by the charged areas of the photoconductor on to the electron responsive phosphor to form intensified light images reversely corresponding to the X-ray images. In the arrangement, Fig. 1, the electron beam is generated by a gun, the cathode of which is about 10 volts negative to earth, and the electrons are accelerated and focused in a diffuse beam by a wall coating 19 connected to grid 4 and maintained at a potential of about 10 Kv.; the grid 4 is coated with luminescent material on the side opposite the electron gun. The target 3, shown in Fig. 2, comprises a phosphor 6 sensitive to X-rays and deposited on a support 2 which may be the end wall of the tube; the phosphor is covered with a transparent conducting layer 7 which in turn is covered with a photo-conductive layer 8. The conducting layer 7 is maintained at a potential up to about 25 volts. In operation parts of the photo-conductive layer 8 become conductive due to the light image generated by the fluorescent layer 6 and the parts are not charged by the electron beam; the remainder of the layer is charged by the beam and the beam is then repelled by the charges on to the fluorescent screen 4-to form an image which is the reverse of the image on the layer 6. The image on the screen 4 may be projected on to a viewing screen 29<SP>1</SP> by an optical system 28'. The -emission spectrum of the phosphor on the grid 4 should be selected in conjunction with the photosensitivity spectrum of photoconductor 8 so that light from the grid 4 does not modify the charge on the photoconductor 8. In a modification, Fig. 4 (not shown), the electron beam is generated by an extended photocathode energized by an electro-luminescent cell which may be secured to the envelope. The photocathode may be composed of antimony on which caesium is deposited by flashing in a vacuum, the cathode then being heated to a temperature between 150 and 210C. to form a caesium antimony compound. Other suitable photosensitive surfaces may be produced by flashing caesium on arsenic or bismuth or any mixture of arsenic, antimony or bismuth, or by flashing other alkali metals, such as rubidium, or mixtures of these metals on deposits of arsenic, antimony or bismuth or mixtures of these. Specification 716,159 is referred to.
Patent GB-1216703-A (GB)
Title: Improvements in and relating to ventilators for the ventilation of buildings
IPC: F04D29/40
Filed: 1968-01-26
Abstract: 1,216,703. Axial-flow fans. NORDISK VENTILATOR CO. A/S. Jan. 26, 1968 [Jan. 30, 1967], No. 4334/68. Heading F1C. [Also in Division F4] A fan for ventilating buildings comprises a cylindrical intake duct 9 fitted coaxially around a cylindrical exhaust duct 8, air being impelled in opposite directions through the two ducts by respective impeller vanes 3, 2 driven by a common motor 1. When respective dampers 19, 14 movable axially through a common control rod 16 by a motor 17 are open, air is drawn into the intake duct 9 through an opening 25 above the roof 22 and is discharged below the celling 21 through twelve nozzles 10, while air entering the exhaust duct 8 at 13 is discharged at 26. When the dampers 19, 14 are moved downwardly to close the lower ends of the ducts 9, 8, the resultant occurrence of a gap between the damper 14 and an impeller shroud 5 provides an inter-connection between the ducts. The nozzles 10 can be individually throttled by means of guide vanes 30.
Patent GB-1523855-A (GB)
Title: Heat exchangers
IPC: C23F1/00
Filed: 1977-02-02
Abstract: 1523855 Etching BORG-WARNER CORP 2 Feb 1977 [23 Feb 1976] 04335/77 Heading B6J [Also in Division F4] Nucleate boiling surfaces are prepared on a metallic heat exchanger surface by masking the surface with cracked chrome, nickel, or scored lead plating and then treating the surface with an etchant to create selective sites for the nucleate boiling. Copper, aluminium and steel heat exchanger tubes are thus etched with conventional etching compositions.
Patent GB-829774-A (GB)
Title: Improvements in or relating to glass compositions
IPC: C05D9/02
Filed: 1956-02-13
Abstract: A method of drawing or extruding a non-ferrous metal or alloy includes the step of lubricating the surface of the metal or alloy with a glass composition (see Group XXIII).  In the examples, glass compositions suitable for use as lubricants in the extrusion of aluminium base alloys are described, the glasses having the following molar compositions: (1) P2O5 29.4%, Al2O3 18.3%, Na2O 44.8%, K2O 7.5%; and (2) P2O5 46.2%, Al2O3 5%, Na2O 48.8%ALSO:Fertilisers comprise a glass composition (see Group XXIII)  Examples in molecules per cent.: <TABS:0829774/I/1>
Patent GB-788733-A (GB)
Title: Fertilizer distributor
IPC: A01C17/00
Filed: 1955-02-15
Abstract: 788,733. Fertilizer distributers. KRAMER, T. H. R., and FOLKERTS, J. N. Feb. 15, 1955, No. 4504/55. Class 6(1). A fertilizer distributer comprises at least one distributing device 21 mounted for rotation about a horizontal plane on a wheeled frame 1 and driven so that the device rotates first in one direction and then in the opposite direction. As shown, material is fed from two hoppers 19 to two discs provided with radial ribs or strips 22. On the shaft of each disc is provided a pulley around which a cable or rope 12 is passed. The cable or rope 12 is attached by means of springs 11 to a pin 10 guided in a slot in a channel beam 24 and reciprocated through an arm 9 by a crank pin 8 provided on a crankdisc 7 driven from landwheels 3, 4 through a gear transmission 5. Each hopper is provided with a slide 20 for regulating the supply of fertilizer to the discs. The hoppers may be replenished from a supply carried on the frame 1. The discs may be rotated by gearing and the drive may be taken from a tractor power shaft.