baber/WOPTO huggingface dataset:
Patent GB-791894-A (GB)
Title: Improvements in or relating to the production of synthetic resins
IPC: C08F2/24
Filed: 1956-03-09
Abstract: Polymers, e.g. in the form of beads and granules, are made by dispersing an ethylenically unsaturated monomeric material in water with the aid of an amphoteric dispersing agent such as gelatin at a pH equal to or higher than the isoelectric point of the dispersing agent until a stable dispersion is formed and then polymerizing the monomeric material at a pH below the isoelectric point of the dispersing agent.  The amphoteric dispersing agent may be used in conjunction with other dispersing agents such as methyl cellulose, polyvinyl alcohol, gum tragacanth, or sodium alginate.  The polymerization is preferably effected in the presence of a catalyst. The monomeric material may be vinyl chloride or bromide, alone or admixed with vinyl acetate, propionate, butyrate or benzoate, methyl, ethyl, butyl or allyl acrylate and the corresponding esters of methacrylic acid, styrene, o-chlorostyrene, parachlorostyrene, 2,5 - dichlorostyrene, 2,4 - di-chlorostyrene, para-ethyl styrene, alpha-methyl styrene, divinyl benzene, vinyl naphthalene, butadiene, chloroprene, acrylonitrile, acrylic acid amide, acrylic acid anilide, the methyl, ethyl, propyl, butyl, amyl, hexyl heptyl, octyl, allyl, methallyl, or phenyl ester of maleic, crotonic, itaconic, or fumaric acid.  Specified catalyst are benzoyl, lauroyl, dicaproyl, acetyl benzoyl, diacetyl, and di-tert-butyl peroxide, alpha, alpha1-azodiisobutyronitrile, and di-methyl alpha, alpha1-azodiisobutyrate, p-tertbutyl perbenzoate, and tert-butyl perlaurate.  The pH may be adjusted with acids such as sulphuric, hydrochloric, phosphoric, citric, oxalic, or acetic.  Specification 766,424 is referred to.
Patent GB-339898-A (GB)
Title: Improvements in wrenches
IPC: B25B23/10
Filed: 1930-03-07
Abstract: 339,898. Colognori, A., and Werkstell, L. March 30, 1929, [Convention date]. Rigid-jaw wrenches; jaw faces and attachmettt.!.-The head of a wrench, having faces 14<a>, 14b to engase a nut, is bifurcated to receive two pivoted members 21, 22 which are rocked to the position shown in Fig. 4 as the wrench is engaged on the nut, but which are moved to the position shown in Fig. 1 to effect a tighter grip on the rut as the latter abuts against the ends 30, 31 of members 21, 22. The wrench is disengaged by moving it longitudinally to rook the pivoted mem. bers haek again.
Patent GB-890241-A (GB)
Title: Improvements in punch presses
IPC: B21D28/16
Filed: 1960-03-03
Abstract: 890,241. Punching. ALMATIC A.G. March 3, 1960 [March 4, 1959], No. 7595/60. Class 83 (4). A punching press comprises a punch 6 operated by a ram 1, and a hold-down 17 operated through pins &c. 16 by an hydraulic plunger 15 in the ram. The ram 1 may be driven mechanically, or as shown, hydraulically and has a bridge 5 supporting the punch and formed with passages for the pins 16. An hydraulically-operated ejector 10 acts in the die 9. In a modification (Fig. 2, not shown), the bridge carries two punches or an annular punch and also a flanged ring for retaining the hold-down. A thrust plate movable in a chamber in the bridge transmits the thrust of the plunger to the pins. In a similar construction, Fig. 3, the hold-down 46, retained by the ring 53 on the bridge 41 of ram 40, has one or more lips 47 for penetrating the work. An ejector pin 51 in the bore of the annular punch 42 is operated by the plunger 44, which also acts on the pins 45 operating the hold-down. Specification 869,526 is referred to.
Patent GB-732857-A (GB)
Title: Improvements in or relating to hydraulic control systems
IPC: F15B13/04
Filed: 1953-03-19
Abstract: 732,857. Fluid-pressure servomotor-control systems. NORTHROP AIRCRAFT, Inc. March 19, 1953 [June 9, 1952], No. 7600/53. Class 135. In a control valve in a hydraulic servomotorcontrol system controlling the actuation of aircraft control surfaces comprising a valve spool 35, Fig. 2, having lands 44 each co-operable with a plurality of small diameter metering holes 36 spirally arranged around the periphery of a fixed ported sleeve 34 in which the valve slides so that in the neutral position of the valve one half of each end hole is uncovered to provide a leakage path through the valve and to and from the cylinder 17 of a servomotor to hold the piston 29 thereof in hydraulic balance, each land 44 is formed with a radial hole 71, Fig. 3, opening into an annular recess 70 to provide a by-pass passage between the valve inlet 39 and the valve outlet 40. The arrangement is that as the valve is moved farther away from its neutral position the proportion of the total flow of pressure liquid by-passed becomes progressively less and the by-pass progressively less effective. Thus, at or near neutral position of the valve, the reduction in piston velocity is greatest with consequential increased sensitivity of the aircraft controls. The valve casing 24 is formed on or secured to the servomotor cylinder 17 which is operatively connected to the control surface whilst the rod 19 of the piston 29 is fixed to the aircraft structure, so that on movement of the valve spool to move the cylinder 17, the cylinder 17 moves the casing 24 and sleeve 34 to follow up the movement of the valve spool. Ports 31 connect the valve casing to the servomotor cylinder.
Patent GB-696782-A (GB)
Title: Mechanism for the setting of the starting point of the oscilaltion of the needle andthe adjustment of the amplitude of said oscillation in zig-zag sewing machines
IPC: D05B3/02
Filed: 1951-04-02
Abstract: 696,782. Sewing machines. SOC. PER AZIONI FRATELLI BORLETTI. April 2, 1951 [April 7, 1950], No. 7629/51. Class 112. Needles, vibrating laterally.-In order to provide for independent variation of the amplitude of needle vibration and alteration of the line from which vibration starts in a machine in which the vibration is effected by a forked bar 4 actuated by a cam 3, a fulcrum pin 5 of the bar 4 is carried by a block sliding in a guide 14 which can be moved bodily by an arm 17 from one control lever and moved angularly from a second control lever by a shaft jointed at its ends to permit axial and swinging movement. In the embodiment shown, the guide 14 is pivotally mounted by means of a vertical pin in the end of the arm 17, which is fixed to a spindle carrying the first control lever 21 at its lower end, and the pin of the guide is connected by a universal joint 22 to a shaft 25 which is connected at its lower end by a similar joint 27 to the second control lever 31; the joints 22, 27 allow for relative lateral and vertical movements, but not angular movements, of the parts they connect, so that shifting of the lever 31 on its pivot causes corresponding angular movement of the guide 14 on its pin to vary the amplitude of longitudinal reciprocation of the rod 4. Movement of the lever 21 carries the guide 14 obliquely across the length of the lever 4, thus moving this lever longitudinally, so that the line of stitching produced when the guide is set perpendicular to the lever 4 (in which position the needle does not vibrate) is shifted laterally; this movement of the guide also causes the reciprocation therein of the pin 5 to occur mainly or wholly to one side of the pivot pin of the guide so that the needle vibration produced when the guide is in a suitable angular position lies correspondingly more or less to one side of the line of stitching which would be produced if the vibration did not occur. In the mechanism shown, the lever 4 is connected to a lever 8 pivotally mounted at 9 and engaging at its lower end the needle-bar gate 10 which is pivoted at 11; in a modification the lever 8 is replaced by two arms extending from a vertical rock-shaft.
Patent GB-1460964-A (GB)
Title: Arc welding electrode
IPC: B23K35/40
Filed: 1974-02-20
Abstract: 1460964 Arc welding electrodes BEKAERT SA NV 20 Feb 1974 [20 Feb 1973] 7697/74 Heading B3R An arc welding electrode comprises a steel core provided with a protective coating comprising at least 80% by weight of Fe 3 O 4 , where the thickness of the coating does not exceed 3 Ám. and the overall amplitude of any surface irregularities normal to the surface of said coating does not exceed 3 Ám. and is prepared by a process comprising annealing the steel core, for example at a temperature of 300-550‹ C. in atmospheric air with a residence time of 2 minutes. Higher temperatures, e.g. 600- 1000‹ C. and other atmospheres, e.g. an air/ steam mixture or air/protective gas mixture may alternatively be used. The electrode is used in arc welding processes, for example, shieldedarc welding using a protective atmosphere consisting at least partially of CO 2 . The electrode may have other cross-sections than circular, e.g. triangular, square and rectangular and may be formed from twisted wire strands.
Patent GB-1361773-A (GB)
Title: High-pressure discharge lamp
Inventor: SCHAT B R
IPC: H01J61/36
Filed: 1973-02-16
Abstract: 1361773 Metal-vapour discharge lamps PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 16 Feb 1973 [21 Feb 1972] 7725/73 Heading H1D The resistance of part of the current lead-in conductor to an electrode 8 of a high-pressure discharge lamp is so high that the product of this resistance and the current (in amps) is more than unity, the heat generated when the lamp is in operation preventing the formation of a cool spot at the end of the lamp. The high resistance may be provided by reducing the cross-section of a lead-in conductor of Nb where it passes through a discharge tube closure member consisting mainly of alumina. In the sodium vapour lamp shown a Mo current-supply rod 9 and Mo rod 7 supporting the electrode 8 are secured in a cylindrical stud 5 of Mo/alumina cermet secured by a glass seal to the end of the discharge tube wall 4 of alumina. The specific resistance of the cermet is about 0.4 ohm cm. Alternatively the wall 4 may be of sapphire and the stud 5 of a Fe/alumina cermet. The lamp may alternatively have a mercury vapour filling with one or more halide additives.
Patent GB-1166562-A (GB)
Title: Improvements in or relating to Air-Cushion Vehicles
Inventor: PIPER NORMAN DOUGLAS
IPC: B60V1/00
Filed: 1965-11-17
Abstract: 1,166,562. Air cushion vehicles. HOVERMARINE Ltd. 17 Feb., 1967 [17 Nov., 1965], No. 7727/67. Heading B7K. An air cushion vehicle 1 has sidewalls 2 each adapted to support a plurality of contiguous wheels 7. The cushion space is sealed at its forward end by a flexible skirt 3 and at the rear end by an inflatable bag 4 and laterally the wheels are adapted to form lateral seals. They may be arranged in staggered overlapping rows or the gaps between adjoining wheels may be reduced by smaller wheels, brush type seals, inflatable bags or local air curtains. The wheels may be extended or retracted and may be driven to provide propulsion on land or water. Reference has been directed by the Comptroller to Specifacation 1,110,212.
Patent GB-1514697-A (GB)
Title: Testing semiconductor wafers
IPC: G01N27/00
Filed: 1977-02-24
Abstract: 1514697 Semi-conductor devices INTERNATIONAL BUSINESS MACHINES CORP 24 Feb 1977 [15 March 1976] 07821/77 Heading H1K An intermediate step during the manufacture of semi-conductor devices comprises testing a semi-conductor wafer 1 including a surfaceadjacent N-type region 15, for defects, by contacting the region 15 with a weak H.F. acid solution 6 and applying a potential between the acid 6 and the wafer 1 to form a depletion region below the surface of the wafer 1, within which defects 16 lead to the formation of etched pits 17 in the surface and without the surface as a whole being etched, and the pits 17 being examined optically to determine whether their location and density is such as to justify proceeding with subsequent manufacturing steps. The concentration of the acid in the solution is less than 15% by volume. The wafer 1 may be Si and it may include bipolar transistors. The applied potential is sufficiently low that the depletion region extends only to the base-collector junction so that defects below that junction, which are inconsequential, do not give rise to etched pits.
Patent GB-259830-A (GB)
Title: Improvements in combination cooking utensils
IPC: A47J36/00
Filed: 1926-03-22
Abstract: 259,830. Wilson, R. March 22, 1926. Kettles; heating-surfaces, liquid heating vessel is formed with dished top and bottom plates pierced by a flue or passage B the upper edge of which projects to form a rim to support a taper-shaped fan D. The vessel has a combined spout and filling device F, provided with a hinged cover f and connected to the body by a stay f<1> which may be tubular and provided with a whistle. In place of the vessel D a toasting plate or saucepan can be rested on the rim b<1>, and larger vessels can be supported on the upper edge of the kettle. The flue B can be closed by a cover. Specifications 6015/95 and 216,409 are referred to.
Patent GB-291181-A (GB)
Title: Improvements in or relating to flower vases, bowls and the like receptacles
IPC: A47G7/06
Filed: 1927-03-22
Abstract: 291,181. Stoneham, E. G. March 22, 1927. Flower vases, bowls, and like water-holding receptacles. - A water container B of glass, metal or other material is held in a bore A' in a wooden vase A or the like, the top and bottom of the container B resting on elastic rings or pads, C, D respectively. The bore A<1> passes through the base of the vase A preferably by a smaller channel A2.
Patent GB-1027020-A (GB)
Title: Improvements in lubricating systems for a plunger-type piston-compressor
IPC: F16T1/38
Filed: 1965-02-24
Abstract: 1,027,020. ROBERT BOSCH G.m.b.H. Feb. 24, 1965 [Feb. 27, 1964], No. 7900/65. Headings F2A and F2T. A lubricating system for a plunger-type piston compressor in which the piston-ring zone is supplied with lubricant at a location between two piston-rings sections, has axial passges 19, Fig. 1 (not shown), in a piston 3 which connect the source of supply of lubricant with an annular groove 15 Fig. 4 (not shown), in the piston, the groove 15 having a ring 16 therein which throttles the outlet of oil therefrom. In use, pressurized lubricant is introduced into a passage 26, Fig. 1 (not shown), in a connecting-rod 25 and passes into an annular groove 27 formed in a head 24 of the connecting-rod 25. Lubricant is conveyed from the groove 27 to the groove 15 in the piston 3, via radial bores 28, 30 and an axialbore 29 in a gudgeon-pin 20, the bore 30 connecting with an annular groove 31 in the piston 3 from which extend the passages 19; and via radial passages 18 connected to the passages 19. The quantity of lubricant which passes through the groove 15 and on to a wall 1a of the cylinder is very small and is returned to the crankcase via grooves 33, Fig. 2 (not shown), in the piston; the rest of the lubricant cools the piston 3 and returns via holes 32 therein.
Patent GB-140441-A (GB)
Title: A machine for solving spherical triangles, more particularly for finding the position of a ship at sea
IPC: G01C21/02
Filed: 1920-03-17
Abstract: 140,441. Le Sort, H. T. M. March 18, 1919, [Convention date]. Spherical-trigonometry calculators.-More particularly for finding the position of a ship at sea, comprises means for calculating, according to Towson's method, i.e.. solving the pole-zenithstar triangle by the means of solving the rightangled triangles formed by dropping a perpendicular from the star upon the meridian, the altitude and azimuth of the observed star from the known data latitude, declination, and hour-angle. The equations involved are of the form Sin a = Cos gamma Sin B which can be expressed thus : 2 Sin a = Sin (# + gamma) + Sin (# - gamma ). As shown diagrammatically in Fig. 1, the shafts a, b are connected to revolution-counters l, m of which the dials are graduated in degrees and minutes of angular measure. The shafts a, b are also connected to two differential gears o, p arranged so that if the counters l, m indicate the angles #, gamma the shafts c, d will rotate an amount proportional to the angles (gamma + gamma), (# - gamma) respectively. The shafts c, d are connected to similar mechanisms i, j as described in Specification 140,442, which enables the driven shafts e, f to rotate through an amount proportional to the sines of the angles (# + gamma), (# - gamma) respectively. The shafts e, f are connected by means of a differential gear q to a shaft g and thereby rotate the shaft g an amount proportional to Sin a; the shaft g acts on a mechanism k similar to the mechanism i, j and thus rotates a shaft h an amount proportional to the angle a which is indicated on a revolutions-counter n. The complete apparatus is shown diagrammatically in Fig. 3, and comprises four appliances R, S, T, and U which are identical to the apparatus shown in Fig. 1. The appliances are combined by connecting the parts that correspond to the same variable, i.e. the shafts 3, 4, and 8 are connected to the shafts 2, 9, and 10, and the shaft 5 is connected to the shaft 6 through a differential gear 18. In operation, the shafts 1, 2, and 7 are rotated to indicate the hour-angle P, the declination D, and the latitude L respectively, the desired values of the altitude H, and azimuth Z will be given on the revolution-counters of the shafts 10, 11. One of the mechanisms 14, 21 may be dispensed with provided that the shafts 24, 25 are connected together.
Patent GB-492601-A (GB)
Title: Improvements in and relating to the treatment of fibrous articles and to products produced thereby
IPC: D21H17/22
Filed: 1937-03-18
Abstract: Fibrous material such as paper and articles made from strawboard, wood fibre or paper pulp, such as paper cartons, fibre bottles and wooden bobbins, are rendered waterproof by coating or impregnating them with a solution of zein in an aqueous organic solvent containing a reactive aldehyde such as formaldehyde or paraldehyde, removing most of the solvent and heating to cure the product.  Organic solvents specified are ethyl alcohol, methyl alcohol, diacetone alcohol, ethylene chlorhydrin, carbitol and the substance known under the Registered Trade Mark "Cellosolve." Plasticizers such as dibutyl tartrate, monobutyl phthalate, para-toluene methylsulphonamide, dyes and antiseptics may be added.  The solution may be applied by dipping, spraying, brushing or by calender rolls.  Moulded fibrous articles may be pre-formed, coated and finished in the heated mould. Suitable curing temperatures are 60-90 DEG  C., or for moulded articles 100-150 DEG  C. An example describes the preparation of a translucent wrapping sheet by impregnating thin porous paper. Specification 492,654, [Group VIII], is referred to.
Patent GB-600542-A (GB)
Title: Improvements in and relating to forms for use as shuttering in constructional work in concrete
IPC: E04G17/04
Filed: 1946-03-14
Abstract: 600,542. Casting concrete constructions in situ. HUISH, H. C. March 14, 1946, No. 8018. [Class 20(ii)] A form for shuttering, for constructional work in concrete, comprises a four-sided metal sheet 1 with metal edge stiffeners 2, 3, 4, 5, one pair of edge stiffeners 2 and 3 . being of channel section with the channels facing outwards and the other pair of stiffeners 4, 5 being provided with projecting parts on their outer sides adapted to nest within channels similar to the elements 2 and 3. One of the pairs of stiffeners e.g. 2, 3 extends a short distance outwards beyond the edges of the sheet and the other pair is correspondingly set back therefrom, the sheet edges abutting to form a continuous surface when the shuttering forms are engaged edge to edge. In the preferred arrangement, Fig. 4, the edge stiffeners 4, 5 are of channel section, the projecting parts being formed by deformation of the bottom of the channel, as at 9. The projecting parts may also be separate spaced lugs fixed to the bottom of the channel. The inter-engaged forms may be connected e.g. by bolting, but the preferred means is the clamp described in Specification 600,544, [Group XXIII]. The forms may be arranged to produce shuttering with right-angled corners, disposed and clamped as in Specification 600,544. The forms may also be connected at any angle by the use of an auxiliary hinge piece which comprises members 40 and 41 of bent sheet steel having staggered slots 42 which inter-engage, a pin 43 being passed through to form a hinged joint. The member 40 is secured to a shuttering form through a steel bar 45 welded therein and bent to nest in the edge stiffener 2, Fig. 12; the member 41 is likewise secured through a flat steel bar 44 which fits under the projection 9 of the edge stiffener 4. The auxiliary hinge pieces may also be used for filling spaces too small for a standard shuttering form. Cross-bracing elements 12 of angle or channel iron may be incorporated and these and the elements. 2, 3, 4 and 5 have bolt holes 13 near their ends for the connection of auxiliary shuttering parts. Bolt holes 14 are also formed in the sheet 1, which may be closed, to provide a flush surface, by filling pieces consisting of discs 15 each having a pair of bent cross strips 16 whose ends project to form radial lugs 17 for engagement beneath tongues 18 bent up from the periphery of a disc 19 welded to the back of the sheet, the cross strips 16 forming handles for rotating the discs into engagement. The shuttering forms may be assembled otherwise than with all junctions aligned, e.g. with vertical joints aligned, the horizontal joints may be staggered to produce shuttering starting from other than a flat base.
Patent GB-729612-A (GB)
Title: Vortex-electrostatic gas cleaner
IPC: B03C3/14
Filed: 1953-03-24
Abstract: 729,612. Electrostatic filters. AIR PREHEATER CORPORATION. March 24, 1953 [March 27, 1952], No. 8040/53. Class 39 (1). An apparatus for separating suspended particles from a gas stream comprises vanes 6 for imparting a whirling motion to the gas stream, a discharge electrode 9 having a series of overlapping portions forming louvres, and concentric outlets 4, 5. Clean gas is discharged through the inner outlet 4 while the collected dust particles are discharged through the outlet 5. The discharge electrode shown comprises a flat metal strip wound into a tapered coil. It may comprise a plurality of overlapping frusto-conical members. The insulator 8 carrying the discharge electrode is supported by the vanes 6. The collector electrode 1 may be louvered.