baber/WOPTO huggingface dataset:
Patent GB-652164-A (GB)
Title: Improvements in and relating to the sparkless interruption of polyphase circuits
IPC: H02M7/40
Filed: 1947-12-24
Abstract: 652,164. Rectifying. AKT.-GES. BROWN, BOVERI, & CIE. Dec. 24, 1947, No. 34195. Convention date, March 31, 1942. [Class 38 (ii)] Arcing in polyphase contact rectifiers, is prevented by shunting the contacts of each phase with a parallel device in series with an auxiliary source of voltage, the control voltage of the grid of the device being dependent on the voltage variations in a choke which is connected in series with the contacts of the associated phase and is unsaturated at low currents. Fig. 1 shows the arrangement for one phase of a contact rectifier having contacts K actuated by a synchronous motor M. The choke D has a magnetizing winding d1 which may be supplied with A.C. or D.C., and a winding d2 in the grid circuit of the arc discharge device E, which together with the source of voltage H and impedance Z is connected in parallel with the contacts K. In operation, assuming that contacts K are closed, i.e. phase u is connected to a D.C. load G, when the current falls to a value at which choke D becomes unsaturated, the voltage induced into the winding d2 initiates the arc discharge. This occurs as the current in phase u approaches a current zero and as the phase v commences to supply the load G. The circuit constants are so arranged that the current which now flows in the parallel circuit is substantially equal to that flowing through the choke D, so that the contacts K are substantially currentless and are opened at this point. As the phase current passes through zero, the arc discharge' device is extinguished and the parallel circuit is rendered ineffective until the next circuit breaking operation. Instead of using a separate parallel circuit for each phase, a common parallel circuit may be connected to each phase in turn by a synchronous switch.
Patent GB-1302664-A (GB)
IPC: H05K3/26
Filed: 1971-07-21
Abstract: 1302664 Brushes COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCATEL 21 July 1971 [21 July 1970] 34278/71 Heading A4K [Also in Division C7] A device for cleaning printed circuit boards 12 comprises an elongate housing 1 having a number of pairs of rotating brushes 2, each pair of brushes being provided with a perforated conduit (6), Fig.1 (not shown) to supply trichlorethylene to the brushes. The fluid is pumped from a reservoir 16 through the pipe 7 to the conduits (6), and a pump 17 draws off the vapour above the reservoir, condenses it and returns it to the reservoir 16. The boards 12 are placed successively between the grooves 13, 14 in adjustable guides 10, 11 whereupon the brushes move them forward as they are cleaned. Towards the end of the housing, the boards 12 activate a compressed air dryer (8) to remove surplus fluid.
Patent GB-864782-A (GB)
Title: Improvements in and relating to appliances for cutting, chopping and/or raising fromthe ground forage or other agricultural crop and the like
Inventor: HORN ALAN NELSON
IPC: A01D34/535
Filed: 1958-10-27
Abstract: 864,782. Forage harvesters. WILDER JOHN Ltd. Oct. 27, 1959 [Oct. 27, 1958], No. 34292/58. Class 6(3). In a forage harvester of the type having flails rotatable about the axis of a horizontal shaft, each flail comprises an arm 1 mountable on an axis parallel to the shaft and a blade 7 pivoted on the outer end of the arm about an axis parallel to the pivot-axis of the arm. The arm has flanged edges 4 and bosses, 2, 5 the axes of which constitute the two pivotal axes. The blade 7 is arcuately curved and thickened laterally to present an elongated outer edge 14. The inner boss 2 on the arm is thickened laterally in the opposite direction to the blade. The machine is similar to that described in Specification 867,724. Specifications 816,421, 846,117 and 11002/55 also are referred to.
Patent GB-340706-A (GB)
Title: Blade ring for radial flow gas or steam turbines and method for producing such blade rings
IPC: F01D5/04
Filed: 1929-11-11
Abstract: 340,706. Steam turbines. AKTIEBOLAGET LJUNGSTRÍMS ANGTURBIN, 17, Võstra Trõdgardsgatan, Stockholm. Nov. 11, 1929, No. 34412. Convention date, Nov. 24, 1928. [Class 110 (iii).] In radial flow steam turbines in which the blades are fixed between ring bonds 11, 12, the finished blade ring is given a tension so that the blades 10 receive a deflection. The object is to counteract the effect of centrifugal force when running. The strain may exist in the blades or in the ring bonds. In Fig. 8 the ring bonds 11, 12, are conical, but are held in cylindrical form by clamps 18, 19, while the blade roots 15, 16 are being threaded into them. Modifications are described in which a dovetail instead of a threaded connection between the blade roots and the ring bonds is used. Specification 314,993, [Class 110 (iii), Turbines &c.], is referred to.
Patent GB-955107-A (GB)
Title: Alcohol-containing mixtures
Inventor: HOLLIS GORDON LATHAM
IPC: C07C29/34
Filed: 1960-10-07
Abstract: Mixtures of alcohols containing 14-18 carbon atoms are prepared by heating a mixture of alcohols containing 7-9 carbon atoms together with sodium alkoxides and trialkyl borates which are derived from this mixture.  The alkoxides may be obtained, for example, by heating the C2-C9 alcohol mixture with caustic soda and benzene and the tri-alkyl borates by heating the alcohol mixture with boric acid and benzene. The C14-C18 alcohol mixture may be condensed with ethylene oxide to give a detergent.  The Provisional Specification describes also the preparation of mixtures of C20 alcohols by a similar method from mixtures of C10 alcohols.
Patent GB-326860-A (GB)
Title: A new or improved calculating device
IPC: G06G1/00
Filed: 1928-11-23
Abstract: 326,860. Macintosh & Co., Ltd., C., and Blezzard, F. Nov. 23, 1928. Slide-rules.-A device for effecting belting- transmission calculations has logarithmic scales representing the following data:-(1) Max. H.P. transmitted; (2) R.P.M. of pulley; (3) Pulley diam. in inches; (4) Width of belt in inches; (5) Arc of contact of the belt with the pulley; (6) - Number of plies in the belt; (7) Per cent reduction in power due to centrifugal tension. A form in which the scales are arranged on rotatable discs is described. The circular base 1 has two scales arranged on opposite parts of its circumference, one scale representing maximum horse powers and the other R.P.M. of pulley. An intermediate disc 2 has a scale representing pulley diameters arranged to co-operate with the R.P.M. scale on the base disc 1. The intermediate disc 2 also carries a series 6 of scales each representing the number of plies in the belt, the different scales referring to different classes of belting. The top disc 3 has window-like openings through which the number-of-plies scales 6 are visible, other scales representing the arcs of contact of the belt with the pulley being provided on the top disc 3 adjacent the windows. The top disc 3 also carries a scale representing widths of belt and arranged for co-operation with the maximum horse power scale on the base 1. The base 1 carries a scale representing percentage reduction in power due to centrifugal tension, an arrow head on the intermediate disc 2 being used in conjunction with this scale. The three discs are rotatably connected together by means 4. The scales are obtained from formulae based on the following data. Maximum tension per inch allowable in one-ply belting = 27 lb. Coefficient of performance, i.e., tension on tight side minus tension on slack side divided by tension on tight side when the arc of contact in 180‹ and the belt is about to slip = 0.725. Weight per foot of oneply belting 1in. wide = 0.0261 lb. In using the device, the known pulley diameter on the disc 2 is set opposite to the known pulley R.P.M. on disc 1, the disc 3 then being rotated to bring the arc of contact adjacent to the number of plies on the relevant scale 6, whereupon the required horse power is obtained by its registration with the known value of belt width. A correction for centrifugal tension may then be applied.
Patent GB-212662-A (GB)
Title: Improvements in and connected with collapsible or folding boats
IPC: B63B7/06
Filed: 1922-12-18
Abstract: 212,662. Ford, A. I)elo-. Dec. 18, 1922. Collapsable vessels. - In a collapsable boat comprising a skin of fabric stretched over a framework, nose fittings consisting of short lengths of tube g inserted into tubular loops at the stem and stern engage with gunwale canes or rods f located in tubular pockets in the skin. The gunwale canes are strutted by struts h and are distanced by stretchers j. The gunwale cover may be in two sections united by sleeves l and row locks r are mounted where the gunwale canes are cut or accommodated in sleeves m having plugs o centrally apertured to receive the row lock. Any slack in the boat fabric may be taken up by end stretchers q which. may be adjusted by auxiliary footings t.
Patent GB-1063972-A (GB)
Title: Improvements in or relating to multiple input control system
IPC: G05B11/32
Filed: 1965-08-13
Abstract: 1,063,972. Automatic control systems. R. C. K. Inc. Aug. 13, 1965 [Dec. 10, 1964], No. 34659/65. Heading G3R. In a control system a plurality of input signals derived, for example, from a number of furnaces whose temperatures are to be controlled, are applied to respective comparison circuits such as 1, 2, where each signal is compared with a reference source to give a resulting error signal; a scanner 3, constituted by a stepping switch, a solid-state switch or the like, applies each error signal in rotation to a single amplifier 4 and the output from the amplifier is applied to regulating means, e. g. the furnace heating control apparatus, whereby each input signal is maintained at a predetermined value. For each input signal the gain of the amplifier 4 may be automatically adjusted by connecting an associated gain setting circuit such as 9, 10 to the amplifier by way of a scanner 8 synchronised with the scanner 3. Further, the output from the amplifier 4 may, for each input signal, be applied to the regulating means by way of an integrating circuit such as 14, 15. A further integrating circuit 16 provides a signal proportional to any drift in the bias adjustment of amplifier 4, and this signal is applied to the amplifier to correct such drift. Suitable arrangements for the circuits such as 1 and 14 are described with reference to Figs. 2 and 3 (not shown).
Patent GB-768288-A (GB)
Title: Destructive hydrogenation of asphaltic hydrocarbons
IPC: B01J23/94
Filed: 1954-11-30
Abstract: <PICT:0768288/III/1> In a process for the production of gasoline and gas oil by the destructive hydrogenation of an asphaltic hydrocarbon oil, mixed with a diluent comprising hydrocarbons boiling in the range between 200 DEG F. and 1000 DEG F. and containing aromatic and/or naphthenic components, in the presence of a catalyst such as an oxide or sulphide of a metal of Group VI or VIII of the periodic system, the catalyst is periodically regenerated by treating it with diluent and hydrogen alone.  The destructive hydrogenation and regeneration are carried out under such conditions that at least 30 per cent by volume of the diluent remains in the liquid phase, the temperature being between 725 DEG F. and 825 DEG F., and the pressure in the range from 100 to 1000 p.s.i.g.  The diluent, which preferably boils between 430 DEG F. and 650 DEG F., is employed, in the on-stream periods, in a proportion between 0.5 and 3 parts of diluent per part of asphaltic oil.  In the apparatus shown, asphaltic oil and diluent, supplied through lines 12 and 16 respectively, are mixed in line 15; and the mixture flows to tank 11.  The mixture is pumped through line 20 wherein hydrogen is added (500 to 6000 cubic feet per barrel of feed mixture) via line 25; and then flows through the coil in furnace 7 into reactor 23 which contains a bed of cobalt molybdate supported on alumina. The reactor is maintained at a temperature of 750 DEG F. to 800 DEG F. and a pressure of 300-600 p.s.i.g.; and the space velocity of feed therein is 0.25 to 2 volumes per volume of catalyst per hour.  The conversion products are discharged into separation zone 28, from which fixed gases, including hydrogen, are withdrawn through line 29, and may be recycled to line 25.  The oil from zone 28 is fractionated in distillation tower 31.  Light hydrocarbons leave the top of this tower, gasoline is withdrawn through line 34, heating oil is withdrawn via line 35, catalytic cracking feed is withdrawn through line 36, while heavy residue is withdrawn from the base of the tower.  Any of these fractions may be recycled to line 16.  When the conversion in the reactor tends to decrease, valves 14, 19 and 21 are closed and valve 39 is opened so that the diluent only passes to line 20 and thence, together with hydrogen, to the reactor.  This treatment lasts 8 to 48 hours, and then the asphaltic oil is put on-stream again.  After repeated regeneration of the catalyst with diluent hydrocarbons, it may become necessary to subject the catalyst to more severe regeneration treatment, e.g. treatment with oxygen-containing gas to burn off coke-like deposits.
Patent GB-798841-A (GB)
Title: Improvements in mobile weigh batching plants
IPC: A21B7/00
Filed: 1955-12-05
Abstract: 798,841. Weighing apparatus. NOBLE, J. D. Dec. 5, 1955 [Dec. 16, 1954], No. 34828/55. Class 143 [Also in Group XXX] The sides and bottoms of the material containing bins 21, 26, 27, 28 feeding a weigh batcher 43, constitute the sides and bottom of a horizontal box beam which is provided with pedestals 31, 32 adapted to support the beam at its ends both in transit and in operation. As shown in Fig. 2, pedestal 31 carries road wheel 29 and pedestal 32 is supported on the fifth wheel 54 of a tractor, but in a modification, Fig. 6 (not shown), pedestal 32 is mounted on a steerable dolly. When in operation the beam is supported by jacks 34, 35, 36 which are stowed on the pedestals during transit. Cement bin 21 is provided with motor driven discharge screws 42, and a levelling screw 46. These screws, together with the discharge mechanism of bins 26, 27, 28, are controlled by apparatus housed in pedestal 32.
Patent GB-871379-A (GB)
Title: Protective coatings for metals and alloys
Inventor: LONG JOHN V
IPC: C03C8/00
Filed: 1957-11-08
Abstract: 871,379. Vitreous enamels. SOLAR AIRCRAFT CO. Nov. 8, 1957, No. 34843/57. Class 56. A metallic body having a crystalline structure is provided with a ceramic coating having a continuous surface consisting essentially of a crystalline or crypto-crystalline structure (as defined) fire-bonded on to said body, said coating having a crystalline interlocked permanent bond with said body, the final crystal structure of the enamel being substantially the same as that of the metal to which it is bonded by firing. The enamel comprises at least two materials, each from one of the different classes below each having a space group which is selected from a particular set of space groups according to the Schoenflies system of classification. The component materials form five classes viz., (1) Beryl, mullite, potassium feldspar, spodumene, zinc zirconium silicate, calcium zirconium silicate, barium zirconate: (2A) silicon, aluminium, chromium, iron, nickel, cobalt: (2B) cobalt, cuprous, chromic, mangomous and nickel oxides, magnetite and haematite: (3) zirconium dioxide, aluminium oxide, titanium dioxide, zircon, stannic oxide, beryllium oxide, silicon carbide, and zinc oxide : (4) silica (quartz), boron oxide and phosphorus pentoxide; (5) lithium, sodium, potassium and calcium fluorides, magnesium oxide, calcium oxide and molybdenum dioxide. The selected ingredients may be milled to produce a slip which may be sprayed on to the surface to be coated, dried and fired, or they may be fitted and wet or dry ground to the fineness required for spraying, dipping or slushing. Many compositions are exemplified in the Specification.
Patent GB-745330-A (GB)
Title: Improvements in or relating to apparatus for receiving and stacking sheets of paper, board and the like
IPC: B65H31/10
Filed: 1953-12-16
Abstract: 745,330. Sheet-delivery apparatus. S & S CORRUGATED PAPER MACHINERY CO., Inc. Dec. 16, 1953 [Dec. 31, 1952], No. 35054/53. Class 100 (1). [Also in Group XXX] Apparatus for receiving sheets from the delivery end of a sheet-cutting mechanism comprises a first conveyer for moving the sheets in a first direction and a second conveyer for moving the sheets in a second direction at right-angles to the first direction, the arrangement being such that the sheets are deposited on a plurality of retractable fingers forming a platform above the second conveyer, which when lowered allows the sheets to fall on to the second conveyer for movement thereby. As shown, sheets from a cutting-machine 10 are delivered along conveyers 18, 20 to a gate device 26, and, after passing through the gate 26 the sheets drop on to fingers 32 which support the sheets above a further continuously-driven conveyer device 27 comprising rollers 29 and bands 28. An adjustable gauge 42 is provided for aligning the front edges of the sheets. The fingers 32 are interconnected by linkage 35 and operated by mechanism 36 including an air pressure cylinder 40. When a predetermined number of sheets has been deposited on the fingers 32 as determined by electric contacts 48, 50 or other known timing device the mechanism 36 is actuated to move the fingers 32 into the full-line position shown in Fig. 4, the sheets then being deposited on the delivery conveyer 27. At the same time the gate 26 is closed to prevent further delivery of sheets until the fingers are again in their raised position. A second delivery conveyer 27<SP>1</SP>, gate device 261 and bridge conveyers 64, 62 may be provided for receiving sheets from a second conveyer 14 of the cutting-machine 10.
Patent GB-1189198-A (GB)
Title: Improvements in or relating to Centrifugal Pumps
IPC: F04D29/42
Filed: 1967-07-31
Abstract: 1,189,198. Welding by fusion; making centrifugal pumps. GRUNDFOS A.S. 31 July, 1967 [9 Aug., 1966], No. 35080/67. Headings B3A and B3R. [Also in Division F1] A multi-stage centrifugal pump housing comprises a number of coaxial sections 1, Fig. 1, bolted together and each containing a guide device 6 comprising inner and outer shrouds 16, 17 and a series of blades 23 secured to the shrouds by projections (24), Fig. 3 (not shown), located in complementary slots in the shrouds. Each housing section and the outer shroud of the associated guide device is formed in two parts. On assembly of the guide device and attachment thereof to the associated housing section, the two parts of the housing section and the two parts of the outer shroud are brought together as shown at a by a suitable tool and are joined by a single-welded seam extending around the housing. The weld may be made by an electric arc with a protective gas and using the flanges 19 as filler material. Alternatively, the flanges 19 may be of smaller diameter to form a circumferential groove which is filled with foreign filler material. The various parts of the housing section and guide device are made by drawing and punching sheet material, e.g. stainless steel.
Patent GB-742351-A (GB)
Title: Concrete roofs, floors or like constructions
IPC: C04B28/02
Filed: 1953-12-16
Abstract: 742,351. Roofs; floors. DUPRE VERMICULITE (EXFOLIATORS), Ltd., and HITCHINS, J. W. Dec. 13, 1954 [Dec. 16, 1953], No. 35083/53. Class 20(4). Roofs, floors, &c. formed of or screeded with expanded or exfoliated vermiculite are covered with a layer of a bituminous material mixed with cement and sand or fine grade expanded vermiculite. In an example 1¢-2¢ gallons bituminous emulsion per cwt. bag of cement are added to a 4:1 ratio sand and cement mixture. The bitumen proportion is increased to about 2-4 gallons if fine grade vermiculite replaces the sand. Air entraining agents may be incorporated and any kind of finishing applied to the topping layer which may be sprayed on.
Patent GB-1147936-A (GB)
Title: Insecticides
Inventor: SYNNATSCHKE GOTTHARD
IPC: A01N25/08
Filed: 1966-08-05
Abstract: 1,147,936. Insecticidal compositions containing dimethoate. BADISCHE ANILIN- & SODA-FABRIK A.G. 5 Aug., 1966 [7 Aug., 1965], No. 35107/66. Heading A5E. An insecticidal composition comprises dimethoate and finely divided pumice. Optionally an alkylene glycol ether or a polyalkylene glycol ether may be present.
Patent GB-849233-A (GB)
Title: Improved apparatus for calculating intensity of illumination
IPC: G06G1/02
Filed: 1957-11-11
Abstract: 849,233. Mechanical calculating apparatus. ELECTRICALS Ltd., SHORTT, J. S., and BELL, W. B. Dec. 4,1958 [Nov. 11, 1957], No. 35120/57. Class 106 (1). A device for determining the intensity of illumination at a point spaced from a lighting fitting comprises a circular or part-circular chart marked peripherally with a scale of angles corresponding to the direction of the point from the fitting and bearing a series of curves of equal illumination, and a cursor rotatable over the chart and having a radial scale of the distance or of a function of the distance between the point and the fitting. In the device described, a base member, Fig. 2, carries four part-circular charts drawn for different lighting fittings, and the cursor is in the form of a disc, Fig. 3, with, for convenience only, four radial slots 28 through which the charts are visible. Alongside each slot is a linear scale 30 of the square of the distance of the fitting from the point. The spaces on the charts between the various curves of equal intensity of illumination are differently coloured and legends 34 indicate the average values corresponding to each colour. The reverse side of the base, Fig. 4, is marked with a table comprising a number of double radial columns 36 corresponding to various mounting heights for the fittings. The lines of the columns are read, in accordance with the horizontal spacing of the point from the fitting, through windows 40 in a rotatable disc, Fig. 5, mounted on the rear of the base, and indicate the angle of the point from the fitting and the square of the distance from the point to the fitting, these being the values required for setting on the main portion of the device.
Patent GB-488696-A (GB)
Title: Device for actuating the fuel pump of a diesel-ram
IPC: E02D7/12
Filed: 1937-12-20
Abstract: 488,696. Driving piles. BURGESS, A. F. (Menck & Hambrock Ges.) Dec. 20, 1937, No. 35233: [Class 68 (ii)] [Also in Groups XXVI, XXII, and XXVIII] In rams or pile drivers operated on the Diesel cycle and of the type with movable ram and stationary cylinder the lower end 12 of the ram 1 is tapered to act as it falls against one arm of a lever 10 pivoted at 16 in the cylinder walls and operating a pump 5 which injects fuel into the combustion space 4. The ram may be lifted by pivoted spring pressed claws 3, carried by a rod 2, and maintained in raised position by a latch 11. An air valve 7 allows entry of air to facilitate fall of the ram. Exhaust gases escape at 8.