baber/WOPTO huggingface dataset:
Patent GB-702801-A (GB)
Title: New or improved process for the production of zinc
IPC: C22B19/04
Filed: 1951-11-23
Abstract: A process for the production of zinc comprises reducing zinc oxide by means of an alloy whose reaction with zinc oxide evolves a quantity of heat between 18,000 and 48,000 calories per gramme molecule of zinc oxide and simultaneously distilling off the zinc.  The alloy may be one containing silicon and aluminium such as one containing silicon 55-80 per cent., aluminium 8-25 per cent., iron 5-15 per cent. and 0.5-6 per cent. of titanium or other impurities.  Zinc oxide may be intimately mixed with the reducing alloy and the mixture briquetted.  The mixture may be fed onto a liquid slag bath, e.g. a bath of mixed silicates through which an electric current is passed. The reaction mixture may also contain lime, silica and alumina in such proportions that the slag obtained after reduction forms a cement.  The reaction is preferably carried out under reduced pressure, e.g. 0.3-5 m.m. of mercury, at a temperature of at least 900 DEG C.
Patent GB-170847-A (GB)
Title: Improvements in supports or rims for india rubber tyres
IPC: B29D30/02
Filed: 1921-10-20
Abstract: 170,847. Deslandes, M. Oct. 27, 1920, [Convention date]. Void [Published under Sect. 91 of the Act]. Rims.-The foundation band a on to which the rubber tyre A is vulcanized is formed with lightening- holes b. The tyre shown is formed with apertures d the cores for which may be withdrawn through the holes b.
Patent GB-405400-A (GB)
Title: Improvements relating to cycle and like saddles
IPC: B62J1/02
Filed: 1932-10-07
Abstract: 405,400. Saddles. WRIGHT SADDLE CO., Ltd., and HOLLAND, C. A., 160, Bristol Street, Birmingham. Oct. 7, 1932, No. 27927. [Class 136 (iii).] In a saddle top of the type comprising longitudinal coil springs extending from the peak to the cantle and having a binding-device to hold them close together at the peak end, the springs are modified, as by tapering or by a reduction of girth at an intermediate point, in such a way that a positive engagement between each spring and the binding-device is effected. In the form shown in Figs. 4 and 5, the springs a are of tapered form, and are engaged with circular notches e in an arched plate d by screwing them into such notches from their thin ends, the upper edge of the plate lying flush with or slightly below the outer surfaces of the assembled springs. In the modification shown in Figs. 6 and 7, the springs a have reduced portions b, and the bridge member is formed of two plates d, d<1>, each having notches e widened at one side and oppositely inclined to those of the other plate, so that when the two plates are placed together, portions of each plate overlap the notches of the other plate to produce circular recesses. The plates are engaged separately with the reduced parts b of the springs, and are then secured together, as by bending one pair of ends f over the adjacent ends. In a modification, the reduced parts b are engaged by a tape or other flexible band.
Patent GB-1399526-A (GB)
Title: Semiconductor device
IPC: H01L23/31
Filed: 1972-06-15
Abstract: 1399526 Semi-conductor devices TRANSISTOR AG 15 June 1972 [18 June 1971] 27928/72 Heading H1K A p-n junction 12 adjacent a major surface of a semi-conductor body 1 is intercepted by an elongate parallel grooves 9, 10, 11 which respectively surround a part A of the surface containing the main region of the device and auxiliary regions 7, 8 of the device, In the Si thyristor shown the frunction of the axuiliary regions 7, 8 is to reduce the deleterious effects of the surface on the characteristics of the blocking junctions 13. The regions 7, 8 are initially parts of a Ga-diffused p type layer 3 formed in the n type body 1, a similar layer 14 being provided at the opposite surface of the device. Grooves 9<SP>1</SP>-11<SP>1</SP> are also formed at the opposite surface. A P-diffused n type emitter region 5 is provided in the main part A of the upper surface. The grooves 9-11, 9<SP>1</SP>-11<SP>1</SP> are formed by etching and are preferably lined with glass 12. The grooves 11, 11<SP>1</SP> may be used to define the separation lines between a plurality of chips formed in a common wafer. Diodes, triacs and high voltage transistors are also mentioned.
Patent GB-1224782-A (GB)
Title: Vibratory road-roller
Inventor: KALTENEGGER BENNO
IPC: E01C19/28
Filed: 1968-06-13
Abstract: 1,224,782. Road rollers. B. KALTENEGGER. 13 June, 1968 [25 Aug., 1967], No. 28111/68. Heading B7H. In a vibratory road roller having two roller drums 2, 3 mounted one behind the other in a rigid frame 4, one drum 3 is 30 to 50% or more heavier than the other, and there is provided in at least the drum 3 a vibrator shaft 15 carrying eccentric weights 16. The drums 2, 3 are driven through gears 11, 12, 13, 14 from a gearbox 21 coupled through a belt drive 20 to an engine 19 mounted on the frame 4. The vibrator shaft 15 is driven through a toothed belt 23 from a secondary output from the gearbox 21. The drum 3 may weigh 50% of the total weight of the roller. In another embodiment, Fig. 4 (not shown), vibrator shafts are provided in both drums and the size of the eccentric weights thereon is proportional to the weight of the drums. A clutch is provided whereby either vibrator shaft can be driven from the engine or from a separate vibrator motor. The heavier drum may be longer than the lighter drum and one side of the frame correspondingly stepped so that two rollers may be ganged as shown in Fig. 5 for double width rolling without leaving an uncompressed central strip, the adjacent frame portions being connected by means including rubber buffers 37. Two rollers so combined may be driven each by its individual engine or by a single common engine.
Patent GB-634607-A (GB)
Title: Improved rocking-piston fluid-drive
IPC: F15B15/12
Filed: 1947-10-21
Abstract: 634,607. Semi-rotary engines. GES. DER L. VON ROLL'SCHEN EISENWERKE AKT.-GES. Oct. 21, 1947, No. 28152. Convention date, April 26, 1939. [Class 110(ii)] The engine comprises one or more pistons 4, 5, movable relatively to a casing 3, and throttling means for the working-fluid supply and exhaust lines. In Fig. 1 the casing 3 is keyed to a driven shaft 2, the pistons 4, 5 being stationary and secured to a housing 6 containing fluid supply and exhaust lines 7, 8 for working cylinders 12, 13. As shown, working-fluid will force open the pivoted valve 9, act on a partition 11 and rock over the casing 3, cylinder 13 being exhausted through the line 8 until a valve 10 gradually throttles the end of line 8. The flow through lines 7, 8 is then reversed and the casing moved anti-clockwise. Packings 14 seal the peripheries of the pistons. The casing may be locked in any intermediate position. In Fig. 4 a pair of pistons 18 are keyed to the driven shaft, and the casing is stationary. The supply and exhaust lines.25 are throttled by means of a flange 27 on the end of a piston, through holes 29. Fig. 6 shows a further arrangement in which a single-acting piston 36 is allowed to move back into its cylinder 37, upon release of fluid pressure through a line 38, through the action of a counter-weight 35 or a spring. A perforated flange 39 co-acts with the end of the fluid supply and exhaust line 38. The driven shaft 33 may actuate a throttle valve 32, or other mechanisms. In a drive using two pistons acting in opposite directions. separate driving fluids could be used for the pistons.
Patent GB-1479896-A (GB)
Title: Process for the production of sodium percarbonate by atomisation
IPC: C01B15/10
Filed: 1974-06-25
Abstract: 1479896 Sodium percarbonate PRODUITS CHIMIQUES UGINE KUHLMANN 25 June 1974 [28 Aug 1973] 28164/74 Heading C1A Sodium percarbonate is prepared by forming by atomization a fine spray of each of a hot aqueous solution of sodium hydroxide and an aqueous solution of hydrogen peroxide, and reacting the said sprays in the presence of a hot gas mixture comprising air and carbon dioxide, the hydrogen peroxide being supplied in a stoichiometric excess not exceeding 5% by weight. The product may be transferred to a fluidized bed where it is cooled by the fluidizing gas; and it is preferable to supply less than the stoichiometric amount of hydrogen peroxide to a reaction chamber, and to supply the balance of the stoichiometric amount to the fluidized bed in the form of a fine rain.
Patent GB-483476-A (GB)
Title: Improvements in or relating to the heating of absorption refrigerating apparatus
IPC: F25B33/00
Filed: 1936-10-16
Abstract: 483,476. Refrigerating; heattransfer systems. ELECTROLUX, Ltd. Oct. 16, 1936, No. 28192. Convention date, Oct. 26, 1935. [Classes 29 and 64 (ii)] Absorption refrigerating-apparatus is heated by an indirect heat transfer system containing liquid having its heat delivering member heating the boiler of the refrigerating-apparatus, in which the transfer system is arranged to be heated by two heat sources, one source comprising waste heat, such as the exhaust gases of an internal-combustion engine, and the other source operative. when the waste heat is not available. For example the boiler 10 of a refrigerating machine is heated by liquid circulating through a system including a coil 12 heated by the engine exhaust pipe 11 and a coil 14 heated by a burner. When the system becomes overheated the liquid expands and rises up an overflow pipe 33 to chamber 39 from which it returns to the system through a pipe with cooling fins 32. The apparatus may also comprise a transfer system in which liquid is evaporated and condensed. The heat source additional to the waste heat may be a heat accumulator. For example a continuous cycle refrigerating machine may be heated from the waste heat source and an intermittent refrigerating machine is arranged with its condenser in contact with the condenser of the continuous machine, its evaporator in the cooling chamber and its generator absorber heated by the waste heat source. The intermittent machine generates while the waste heat source is operative, but when this is cut off the machine commences to refrigerate and also supplies heat to the continuous machine to maintain it in operation.
Patent GB-888990-A (GB)
Title: Improvements in and relating to apparatus for impregnating fabric
Inventor: CHARLTON RICHARD EDMUND
IPC: D04H1/655
Filed: 1958-09-03
Abstract: 888,990. Impregnating webs. WEST POINT MANUFACTURING CO. Sept. 3, 1958, No. 28240/58. Class 140. A vacuum extraction tube 32 for removing excess liquid impregnant from a non-woven fabric web supported on an endless wire screen, has a flat upper surface 46 having a slot 48 extending longitudinally therein and communicating with the interior of the tube, the width of the surface 46 on one side of the slot 48 being at least five times as wide as the slot. The tube 32 is rectangular in section and comprises two halves bolted together at 38 along abutting flanges 40, one end of the tube being closed by a disc 54 having a drain pipe and a connection to a manometer, and the other end having an adapter 62 engaged by a conduit 64 leading to a blower for producing a vacuum in the tube 32. The wire screen and the supported web pass over the surface 46, which should be of polished chromium, before the screen and web separate. The impregnating apparatus is similar to that described in Specification 703,574 and the tube 32 passes at each end through bars and rests on pads on a frame which supports the whole apparatus. The speed of passage of the screen may be coordinated with the rate of formation of the web.
Patent GB-921826-A (GB)
Title: Improvements in and relating to electric cooking stoves
IPC: F24C7/06
Filed: 1960-08-16
Abstract: 921,826. Electric heat-storage stoves; heat storage cookers. H. V. MANSFIELD. Nov. 13, 1961 [Aug. 16, 1960], No. 28291/60. Classes 39 (3) and 126. An electric cooking-stove comprises an oven consisting of a metal casing having the external faces of its top and bottom walls in contact with flat slabs of heat-retaining material, and electric heating elements located between the top and bottom walls of the oven and their respective heat-retaining slabs. In the example shown, a cooking-stove comprises two ovens 14 and heatretaining slabs 18, 19 in direct contact with the top and bottom walls 16, 17 of the ovens, respectively. Each slab has grooves 20 (Fig. 7) registering with grooves 15 in the corresponding oven walls. Electric heating elements 21 of any suitable type are located in the grooves as shown. In one of three alternative arrangements of the heating elements illustrated in Figs. 4, 5, 6 (not shown), the elements are of triangular crosssection and are located in grooves in the slabs 18, 19 only whilst the corresponding oven walls are not provided with grooves; in the other alternative arrangements heating elements of square or elliptical cross-section are employed. The slabs 18, 19 are made of refractory material such as fireclay, a ceramic substance, or cast iron. In a second example illustrated in Fig. 8 (not shown) the heat-retaining slab 18 is in contact with one or a plurality of blocks for conducting heat to one or a plurality of hot plates 12, heating elements being provided beneath the hot plates to serve as booster elements. The heat-retaining slabs may be provided with sheet-metal backing members (Fig. 8, not shown) and be clamped to the respective ovens by encircling bands. The space between the ovens and an outer casing 10 is filled with heat-insulating material 26 such as resin-bonded fibre glass or slag wool. Specification 890,893 is referred to.
Patent GB-1392338-A (GB)
Title: Tunnel liners
IPC: E21D11/40
Filed: 1972-06-16
Abstract: 1392338 Tunnels; arcuate blocks COMMERCIAL SHEARING INC 16 June 1972 [3 Dec 1971] 28309/72 Headings E1B and E1F A tunnel lining is constructed with preformed arcuate trapezoidal segments 13, the segments having sealant 14 attached to their edges 15, 16 before placing in the lining. Sealant 19 is also applied to the edges when the lining is in place. During erection of the lining removable clips 22, 23 are used and in a modification removable discs (not shown) on one segment may engage adjacent segments. The segments may be of reinforced concrete or reinforced resins.
Patent GB-1223217-A (GB)
Title: 3-substituted-benzyl cyclopropanecarboxylates
IPC: C07D333/16
Filed: 1969-06-04
Abstract: 1,223,217. Benzyl cyclopropane carboxylates. SUMITOMO CHEMICAL CO. Ltd. 4 June, 1969 [6 June, 1968 (2)], No. 28348/69. Heading C2C. [Also in Division A5] The invention comprises compounds of the Formula I wherein R 1  is a hydrogen atom or a methyl group, R 2  is a methyl, 2-methyl-1-propenyl, 2- methoxycarbonyl - 1 - propenyl, phenyl or 3,4- methylenedioxyphenyl radical when R 1  is a hydrogen atom or R 2  is a methyl radical when R 1  is a methyl radical, R 3  is a phenyl radical or a 5-membered heterocyclic ring (e.g. thiophene, furan, pyrrole) each of which may be substituted by a chlorine atom or a methyl group. They are prepared by reacting a benzyl compound of the formula where A is a halogen atom, hydroxy or tosyloxy group with the appropriate cyclopropane carboxylic acid or its reactive derivatives, e.g. acid halides, anhydride, salts or lower alkyl C 1-4  esters. The compounds of Formula I have insecticidal activity.
Patent GB-791428-A (GB)
Title: Improvements in or relating to transmission mechanism
Inventor: ORR PALMER
IPC: F16H3/54
Filed: 1956-09-17
Abstract: 791,428. Change speed gearing; ratchet clutches. BORG-WARNER CORPORATION. Sept. 17, 1956, No. 28365/56. Class 80 (2). A change speed gear in which one of a pair of relatively rotatable gear elements is held stationary to provide a ratio drive comprises a jamming roller clutch to provide a direct drive from one shaft to the other, and a helical spring one-way clutch connected between the rotatable gear elements to provide a direct drive in the opposite direction, the helical spring clutch being disengageable. In an overdrive unit, the driving shaft 10 is in splined connection with a planet carrier 27 of an epicyclic gear 23, the annulus 24 being rigid with the outer member 18 of a one-way jamming roller clutch 14 the inner member 15 of which is splined to the shaft 10. The outer member 18 is integral with the output shaft 11. The roller cage 20 of the clutch 14 is biased by a spring 22 towards the engaging position. The sun gear 25 of the epicyclic gear 23 is freely rotatable on the shaft 10 and is rigidly connected with a brake drum 31 of a brake 30. An annular plate 38 splined to the sun gear 25 has a notch 37 engaged by one end tang 36a of a helical spring 36 coacting with the bore 35 of an extension of the annulus 24 to form a one-way clutch, the other end tang being held at 39 in a drum 40 freely rotatable on the sun gear 25. The spring 36 is arranged to be normally in frictional contact with the surface 35 to provide a one-way drive in a direction opposed to the clutch 14. For normal direct drive the brake 30 is released and torque is transmitted from shaft 10 to shaft 11 through the clutch 14. Overrun torque from shaft 11 to shaft 10 causes engagement of the spring clutch 33 to transmit the drive, thus providing positive direct drive in both directions. Engagement of the brake 30 holds the reaction run 25 stationary and, through drum 40, releases the clutch 33, torque is then transmitted at overdrive ratio in both directions through the epicyclic gear 23. In one modification, the planet carrier is held by the helical spring clutch; and in a further modification the arrangement of Fig. 1 is reversed to provide an underdrive.
Patent GB-733145-A (GB)
Title: Improvements in or relating to phosphors
IPC: C09K11/76
Filed: 1950-11-21
Abstract: 733,145. Luminescent materials. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. Nov. 21, 1950 [Jan. 13, 1950], No. 28393/50. Drawings to Specification. Class 39 (1). A luminescent material comprises a matrix of calcium or strontium orthophosphate or pyrophosphate or mixtures thereof and a halide of those metals, a manganese and an antimony activator and 0.05-0.4 per cent of one of the metals aluminium, barium, cadmium, caesium, magnesium, lead, thallium and zinc, with a 17 : 15 ratio of metal atoms combined with phosphate and halide respectively. The ingredients and firing conditions of the luminescent mix are given in detail, the calcium and strontium being introduced as acid phosphates, carbonates or chlorides, and the antimony as the oxide or an antimonate of calcium or strontium.
Patent GB-188192-A (GB)
Title: Improvements in excavating buckets
IPC: B66C3/06
Filed: 1921-10-26
Abstract: 188,192. Goold, L. W., (Blaw-Knox Co.). Oct. 26, 1921. Grab - buckets. - A single-chain bucket of the clam-shell type comprises scoop segments 1, Figs. 1 and 4, fitted with hinge castings 2 pivoted together at 3 and upper and lower corner-bars 4', 4, which carry a separate head-block 7 for each scoop. The two ends of an operating cable 9 are anchored to the scoops at 10, the cable passing over two sheaves 8 on the headblocks 7, two sheaves 18 supported on radius ruds 17 pivoted on the outer edges of the scoops, and an equalizing member 11 suspended from the crane hook. Each scoop is provided with identical operating mechanism of the folding-link type, comprising links 13, 15 hinged to one another at 16, the links 13 being pivoted to the scoops at 14 and the links 15 being pivoted at the ends of the radius rods 17. In the closed position as shown, the bucket is supported from the member 11, and the position of the hinge 16 is such that the weight of the load holds the bucket closed. To open the bucket the hinges 16 are moved outwards by tripping-mechanism described below until they are free to drop under the weight of the load. When the open bucket rests upon the ground, the member 11 is lowered until the links 15, 13 fold into the same position, relatively to the scoops, as they occupy when the bucket is closed, and the member 11 is then raised to draw up and close the scoops with the links in the folded position. The tripping mechanism, Fig. 7, comprises a hub 20 on the main hinge-pin 3, which can be turned in the counter-clockwise direction by a tripping-lever 28 so as to move the right-hand link 15 by means of a cam 21 and the left-hand link 15 by means of a tooth 22 which bears against a weighted pawl 26, 27 on the link. Whilst the bucket is closing the pawl 26 hangs freely in the position shown, ready to engage the tooth 22 in the closed position of the bucket. Stops 29, Figs. 1 and 4, prevent further upward movement of the radius rods 17 when the bucket is closed. Webmembers 30 strengthen the hinge-castings 2 and bridge the space between the open scoops to prevent contact between the sheaves and cable and the material being excavated.
Patent GB-1507593-A (GB)
Title: Titanium and titanium alloy surface preparation method for subsequent bonding
IPC: C09J5/02
Filed: 1976-07-08
Abstract: 1507593 Treating titanium surfaces SOC NATIONALE INDUSTRIELLE AEROSPATIALE 8 July 1976 [15 March 1976] 28456/76 Heading C7U Ti or Ti alloy surfaces are prepared for subsequent bonding by (a) optionally degreasing and pickling, (b) immersing in an acidic fluoride bath, and (c) rinsing in demineralized water at a temperature of at least 50‹C to produce a layer of anatase (TiO 2 ) on the surface. Pickling may be effected in a bath containing HNO 3  and HF, and the fluoride bath preferably contains sodium difluoride (NaF. HF).
Patent GB-1224946-A (GB)
Title: Improvements in or relating to the production of heavy water
Inventor: KLUGE HANS
IPC: B01D59/04
Filed: 1969-06-05
Abstract: 1,224,946. Heavy water. STEINKOHLENELEKTRIZITAT A.G. 5 June, 1969 [6 June, 1968], No. 28509/69. Heading C1A. Heavy water is prepared, utilizing the waste heat from the recooling plant 5 in a power installation, by passing cooling air 7 through a cooling tower 1, which air is saturated with water vapour by passing it through tricklers 2 over which is trickled cooling water from sprinklers 3, into a stripping zone 10 in which zone the lower-boiling H 2 O component in the make-up water fed into the cooling tower by means of sprinklers 6 is selectively evaporated leaving the water still in circulation enriched in D 2 O. Preferably, the D 2 O in the mixture of water vapour and air from the stripping zone 10 is recovered therefrom by washing with D 2 O- impoverished water in a concentration zone 11 by condensing the said mixture at 12 and passing the condensate through the concentration zone.
Patent GB-1349216-A (GB)
IPC: C07C11/02
Filed: 1972-06-19
Abstract: 1349216 Purifying olefins TEXACO DEVELOPMENT CORP 19 June 1972 [26 Aug 1971] 28568/72 Heading C5E C 5 -C 30  olefins are purified by treatment in the liquid phase with sulphuric acid supported on an adsorbent. The treatment may be carried out at 0-225 F. using H 2 SO 4  in amount 5-70 wt. per cent on a granular adsorbent such as silica gel, activated clay, fuller's earth, diatomaceous earth, montmorillonite or silica-alumina. After this treatment the olefin stream may be contacted with an adsorbent (e.g. activated clay) or may be washed with aqueous alkali to remove acidic bodies therefrom.