baber/WOPTO huggingface dataset:
Patent GB-581280-A (GB)
Title: Improvements in or relating to the polymerisation of methacrylic acid esters
IPC: C08F20/12
Filed: 1942-09-18
Abstract: Monomeric methacrylic acid esters alone or in admixture with an equal or lesser weight of another unsaturated compound which will polymerize therewith to form an interpolymer or heteropolymer is emulsified in an aqueous medium containing a dissolved salt of perdisulphuric acid and a dispersing agent consisting of an alkali metal salt of an alkyl sulphate or sulphonate containing 12-18 carbon atoms and whose activity is unaffected at pH value between 3 and 5 and polymerized at a temperature between the freezing point of the emulsion and 80 DEG  C. while a substantially oxygen-free atmosphere is maintained over the emulsion.  Suitable perdisulphates are the ammonium, sodium or potassium salts.  The proportion of perdisulphate to monomer is 0.1-10 per cent. Suitable dispersing agents are dodecyl-1 acid sulphate, tetradecyl-1 acid sulphate, octadecyl-1 acid sulphate, dodecane-1 sulphonic acid, tetradecane-1 sulphonic acid, octadecane-1 sulphonic acid, or an aliphatic sulphonate prepared by the sulphonation of paraffinic mineral oils.  The concentration of dispersing agent varies from 0.2-2 per cent based on the weight of the aqueous medium.  The reaction mixture should be agitated during polymerization.  In the example a series of aqueous p  solutions each containing sodium hexadecyl sulphate, methyl methacrylate and equimolecular amounts of different oxygen-yielding compounds are shaken in sealed vessels from which air has been displaced by nitrogen at 45 DEG  C. for two hours. Unchanged monomer is removed by steam distillation and the polymer obtained by filtration and drying. High degrees of polymerization are only obtained when perdisulphates are used as catalysts.  Samples have been furnished under Sect. 2 (5) of the Acts of interpolymers of methyl methacrylate with (1) vinyl chloride, (2) n-butyl methacrylate and (3) styrene. Specifications 578,767 and 579,235 are referred to.
Patent GB-560162-A (GB)
Title: Improvements in lenses
IPC: G02B3/04
Filed: 1942-09-18
Abstract: 560,162. Lenses. BURCH, C. R., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Sept. 18, 1942, No. 13228. [Class 97 (i)] A singlet lens having a flat field and low residual astigmatism in the extended paraxial region when taking parallel light from the front is constructed so as to satisfy the conditions- R is not equal to gamma, the lens being aspherised on the back face alone to remove spherical aberration without changing the paraxial radius of curvature thereof ; in the above conditions, R r d L have the significances shown in the Figure, n equals the ratio of the refractive index N<1> of the lens material to the refractive index N of the surrounding medium, x equals d/r, and y equals L-d/R. A stop may be provided at a distance D in front of the pole of the front surface of the lens to correct for transverse chromatic abberation, the value of D being- Specification 558,657 is referred to.
Patent GB-132515-A (GB)
IPC: E04H12/22
Abstract: 132,515. Schultz, E. Feb. 6, 1918, [Convention date]. Gate-posts. - Wooden posts, masts, stakes, and structures embedded in the ground and damaged have the damaged part surrounded by concrete. The earth around the post is removed, the post treated with preservative, and concrete 16 is filled into the level 17 to enclose metal struts 6 and ribs 10 fastened to the undamaged part 3 by bands 12. When the concrete is set, the post is sawn at 17 and 19 and a concrete cap 20 added to protect the embedded part 2. The concrete is also treated with pre. servative.
Patent GB-134571-A (GB)
IPC: G02B23/08
Abstract: 134,571. Gartmann, G. Dec. 27, 1917, [Convention date]. No Patent granted (Sealing fee not paid). Periscopes.-A movable periscope, particularly intended for use on aircraft, is provided with adjusting-mechanism capable of imparting to it simultaneously a rising movement and a rotational movement, in order that the observer's eye is required to move as small a distance as possible while obtaining a large field of vision. In the construction shown in Fig. 2, the supporting-rod 2 for the periscope 5 is raised by means of a lever 17 connected by a link 15 to the base of the rod 2, and the rotational movement of the periscope is caused by a link 9 pivoted at one end to a block 11 on the periscope 5, and at the other end to a bracket 7 on a disk 6 fixed on the tube 1 in which the supporting-rod 2 slides. In a modification, a Bowden-wire device is used for raising the supporting-rod 2.
Patent GB-585224-A (GB)
Title: Improvements in or relating to chromatographic adsorption processes for the separation and purification of materials
IPC: G01N30/60
Filed: 1944-07-14
Abstract: <PICT:0585224/III/1> Chromatographic adsorption apparatus for the separation or purification of substances has the adsorbent arranged in an annulus &c. through which the solution is passed either inwardly or outwardly.  It may consist either of loose granules or a coherent body, e.g., a series of superposed discs 131-133 separated by watertight discs 60, 61 and arranged in a perforated annular vessel 2, 4.  The vessel may be rotatable to increase the flow by centrifugal action.
Patent GB-1244958-A (GB)
Title: Electric motor
IPC: H02K29/08
Filed: 1970-03-20
Abstract: 1,244,958. Electric motors. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 20 March, 1970 [25 March, 1969; 10 Feb., 1970], No. 13479/70. Heading H2A. In an electric motor having a rotor at least partly made of permanent magnetic material and stator coils which extend parallel to the rotor axis and also radially, parallel to axial end surfaces of the rotor, magnetic field sensitive electronic devices for commutating the current through the stator coils are disposed between an axial end surface of the rotor and the adjacent radially extending parts of the stator coils. The motor disclosed has a diametrically magnetized P.M. rotor 1 and stator coils 3 having radially extending portions 7. Two Hall plates 6 (only one shown) are mounted at 90 degrees to one another in an insulating plate 9 carrying a printed circuit to which the Hall plates are connected. Stray flux is passed through the Hall plates with the aid of polepieces 20, 21 and an annular iron plate 8 which also serve to urge the rotor against a thrust bearing 19. Conductive metal studs 14 connect the printed circuit to the control circuitry housed in space 25 within an aluminium casing 23, 24.
Patent GB-733147-A (GB)
Title: Improvements in packaging methods and means
Inventor: FEASEY JOHN
IPC: B65D65/08
Filed: 1951-06-07
Abstract: 733,147. Packaging. BRAND & CO., Ltd., R. A. Sept. 4, 1952 [June 7, 1951; April 2, 1952], Nos. 13573/51 and 8464/52. Class 94 (1). An article is enclosed in a protective plastic cover which is provided with at least one opening to enable the article to be inserted or comprises several portions adapted to be joined together around the article, the cover as a whole conforming to the general shape of the article and being made apart therefrom by spraying a synthethic resin solution over one or more formers, e.g. using the plastic webbing process, all openings and/or joins in the cover being adapted to be sealed with the production of a substantially moisture vapourproof package having a continuous plastic skin. In one form, Figs. 1 and 1b, a cover 1 shaped to enclose an aircraft engine has an opening 2 closable by a sliding clasp fastener and is reinforced by fabric over areas 3 and 4. Metal caps 5, having flanges 13 embedded in the plastic skin of the cover, are provided for the reception of the engine trunnions 6, whereby the packaged engine may be supported by bushes 9 in brackets 7 on an engine stand 8, 10 and 11. The caps are adjustable on the trunnions by screws 12. After the fastener is closed it is sprayed over with the plastic material of the cover. The caps may also be sprayed over prior to fixing to the brackets. In Fig. 2 a cover 15 is secured in position on an aircraft wing 14 by reinforcing and clamping elements 16 each comprising a tubular portion 17 formed to the shape of the leading edge and flexible rods 18, 19 fitting into the tube. The major portion of each element is within the plastic skin of the cover, but the rods 18, 19 protrude at the trailing edge so that they may be secured together by wing nuts 22. The relative positions of the elements are determined by wire or cord ties 16a. A cover 25 for a folding wing 23, Figs. 3a and 3b, includes a portion 26 which in the extended position of the wing is formed into a tuck held together by a spring 27 anchored to the skin of the cover at 28 and detachably secured to an eye 29 fixed therein. When the wing is to be folded, the spring is released from the eye to allow the tuck to be let out to provide the necessary increase in surface area of the cover.
Patent GB-706928-A (GB)
Title: A self processing photographic assemblage mounted in a magazine therefor
IPC: G03B17/52
Filed: 1947-10-24
Abstract: 706,928. Photographic liquid containing assemblage in magazine therefor. INTERNATIONAL POLAROID CORPORATION. Oct. 24, 1947 [Nov. 5, 1946], No. 13627/51. Divided out of 706,901. Drawings to Specification. Class 98(2) The Specification describes and claims the combination which results when the film assemblages and the magazine of the original Specification 706,901 are used together.
Patent GB-1309228-A (GB)
Title: Production of semiconductor components
IPC: H01L21/308
Filed: 1971-05-07
Abstract: 1309228 Semi-conductor devices SIEMENS AG 7 May 1971 [8 May 1970] 13665/71 Heading H1K A pn-junction terminating beneath a masking layer 5 on a surface of a p(n)-type semi-conductor layer 3 on an n(p)-type substrate 1 is formed by diffusing n(p)-type regions 17, 19 into the walls of trenches 7, 9 extending at least most  of the way through the layer 3, and the substrate 1 is divided into individual devices along the lines of the trenches. As shown the trenches 7, 9, which are preferably etched, may extend a short way into the substrate 1. A transistor is provided by diffusing an emitter region 13 simultaneously with the regions 17, 19, which form parts of the collector region constituted in the main, by the substrate 1. A part of the epitaxial layer 3 thus provides the base region. For a Si device layers 24, 25, 29 of SiO 2  and layer 23 of glass form in the trenches and over the emitter opening during diffusion. Openings for contacts are formed therein and in the oxide masking layer 5, and further openings are etched in the bottoms of the trenches to permit individual devices to be separated mechanically or by etching on planes 35.
Patent GB-528469-A (GB)
Title: Improvements relating to the ports and passages of the cylinders of multi-cylinder internal combustion engines
IPC: F02F1/24
Filed: 1939-05-08
Abstract: 528,469. Cylinders. FABBRICA AUTOMOBILI ISOTTA FRASCHINI, and TEBALDI, A. May 8, 1939, No. 13690. Convention date, May 10 1938. [Class 7 (ii)] In an arrangement of overhead valves in which twc inlet and two exhaust valves 5, 5<1>, 6, 61 alternate round the cylinder heads of a multicylinder engine, similar valves on neighbouring cylinders are adjacent so that they can be served by common passages The inlet passages 7, 7<1> preferably extend along the head casting above the exhaust passages 10. The passages 7, 7<1> are united in a passage 11 containing the main throttle valve.
Patent GB-612705-A (GB)
Title: Improvements in or relating to friction elements
IPC: F16D69/00
Filed: 1943-08-23
Abstract: 612,705. Coated fabrics. RAYBESTOSMANHATTAN, Inc. Aug. 23, 1943, No. 13722. Convention date, July 16, 1942. [Class 140] A friction element has an insert moulded into a mixture of asbestos, fillers and binder, the insert being a woven wire cloth coated with a baked non-metallic stiffening composition of partly inorganic or wholly organic materials capable of bending without substantial cracking and of withstanding temperatures in excess of 400‹ F. without decomposition. The coating may be applied to the wire cloth in solution or dispersion by methods such as spraying or dipping, the cloth is then baked to fix the coating in position and is slit or cut to smaller sizes, when the baked coating resists bending of the cut ends of the wires. Coating materials for the purpose are described as sodium silicate solution mixed with dextrine or formalin, zinc chromate dispersed in a drying oil medium with a solvent such as butyl acetate or mixed hydrocarbons, polymerised vinyl chloride, or vinyl chloride-acetate copolymers in a lacquer solvent such as butyl acetate, aqueous polyvinyl acetate emulsion, baking varnish of a drying oil such as linseed or China wood oil with resins such as phenolformaldehyde or oil soluble styrene resins. Urea-formaldehyde, alkyd, coumaroneindene resins and casein plastic materials are also mentioned. The baked coated wire cloth, after slitting, is embedded in the mixture of asbestos, fillers and binder and compressed or moulded into sheet or strip form. The Specification as open to inspection under Sect. 91 indicates that other suitable coatings include natural resins and certain cellulose nitrate or cellulose acetate base coatings as far as they stand temperatures in excess of 400‹ F. without decomposition. This subject matter does not appear in the Specification as accepted.
Patent GB-1210703-A (GB)
Title: Programme control mechanisms, for example for washing machines
IPC: D06F34/28
Filed: 1968-03-21
Abstract: 1,210,703. 703. Time control of electric circuits. BROWN, BOVERI & CIE A.G. March 21, 1968 [March 23, 1967], No.13733/68. Heading G3T. [Also in Divisions D1 and H1] A programme control mechanism, e.g. for a washing machine, comprises a programme selector switch, having contacts WS, and a programme switch, having contacts PS, and controlled by a device comprising three individually rotatable superposed discs 1, 2, 3, the disc 1 being set by manually adjusting the programme selector switch, as by rotating a hub 13, the disc 2 being coupled to the programme switch, e.g. via cam mechanism (not shown) operating the contacts PS, and the disc 3 forming a timing member. In the embodiment illustrated in Fig. 2 light from a source 4 passing through aligned apertures 17a, 18a Figs.3 and 4 (not shown), in the discs 1, 2, and through a transparent inner zone in the disc 3, is incident upon a photo-electric resistance 5, to reduce its value, thereby energizing a motor M2 momentarily to drive the disc 2 and the programme switch. Contacts (not shown) are thereupon closed to energize a motor M1 to drive the timing disc 3 for the duration of a programme step which terminates when the photo-electric resistance 5 is again activated by light via apertures 17, 18, 19 (not shown) in the discs 1, 2, to energize a motor M2 to set the programme switch for the next desired programme step. The alignment of apertures (17, 18) controls rapid movement of the switching mechanism through programme step positions not required in a particular programme selected, Fig. 1 illustrates a circuit for operating an automatic washing machine in which a motor WM for driving the washing drum is controlled by a reversing switch W coupled to the drum being driven during spin drying by a motor SM. The circuit also includes water inlet solenoid valves V 1 , V 2 , a liquid level detector P, a heater H, a temperature regulator T, and a drain pump PM. In an alternative programme control mechanism the light source and the photo-electric resistance are replaced by spring contacts 24 Fig. 8 (not shown), having portions adapted to pass through apertures in the discs 1 and 2 to engage in recesses in the disc 2 or 3 to energize the motors M1, M2 at the desired times. In this alternative mechanism the disc 1 may be either coaxial with the discs 2, 3 or eccentric thereto. As further alternatives the discs may be rectangular, and the motor M2 may be replaced by a clutch, which is engaged when the programme switch is to be operated. If the programme selected includes a heating stage contacts are provided for arresting the programme switch until the desired temperature is reached.
Patent GB-927676-A (GB)
Title: Improvements in or relating to electric lighting fittings
Inventor: PRICE WILFRED ARTHUR
IPC: G02B5/28
Filed: 1961-04-17
Abstract: 927,676. Electric lighting fittings. GENERAL ELECTRIC CO. Ltd. March 22, 1962 [April 17, 1961], No. 13751/61. Classes 75 (2) and 75 (4). [Also in Group XX] In a fitting especially for use in operating theatres of the kind having a bowl-shaped reflector for directing the light of an incandescent lamp downwards, a hollow transparent screen surrounds the lamp and is coated on one surface with a light-transmitting, heat-reflecting film consisting of a layer of bismuth oxide overlaid with a layer of gold. A second layer of bismuth oxide may be applied over the gold layer. The bismuth oxide layers are at least 80 Š thick and the gold layer between 50 Š and 150 Š thick. In an example, a gold layer 100 Š thick is sandwiched between bismuth oxide layers 130 Š thick. In the fitting shown, a housing 2 carried in a yoke 6 supports a reflector 1 in the shape of a frustum of an ellipsoid having a central opening through which an electric lamp 4 projects. The mouth of the housing is closed by a light-transmitting member having a clear region 8 and a diffusing region 9. A screen in the form of an open-ended cylinder 10 coated on the inner surface with layers as above is supported in a ring 12 secured to the housing 2 by rods 13. Specification 915,568 is referred to.
Patent GB-1334207-A (GB)
Title: Training apparatus for ballsports
IPC: A63B69/40
Filed: 1972-03-23
Abstract: 1334207 Games ball projector F W J SCHWEIGMAN 23 March 1972 [7 May 1971] 13778/72 Heading A6D In training apparatus for projecting sports balls with well-defined speed and direction, a ball is fed through a guide PQRS by at least two hitting or carrying arms a-c mounted for rotation at constant but different angular velocities so that the velocity of the ball is increased in steps and served from the guide section RS. In one embodiment, as shown, three hitting arms a, b, c are provided, each rotating on a shaft A, B, C such that the ends of arms a, b, and b, c may overlap and pass each other. A ball is delivered from a hopper (Fig. 6, not shown) to point P on the guide and is carried by arm a to point Q and thence to point R by the arm b at increased velocity. The third arm c strikes the ball at point R to deliver it through a straight section RS of the guide. In order to reduce friction between the ball and the walls of guide section RS, the end of the striking arm c is curved in the shape of an evolute of the circular path of the arm thus ensuring that the striking force on the ball is directed only along RS, (Fig. 3, not shown). The apparatus is swivelled to produce the desired elevation of the ball trajectory and the angular velocities of the arms may be varied. A spin may be imparted to the served ball by providing a curved section in the guide RS to introduce a frictional moment on the ball (Fig. 4, not shown). This curved section is rotatable about the axis of the straight section to change the spin orientation. Analysis of the spin dynamics and a table of numerical values for the spin are given.
Patent GB-463224-A (GB)
Title: An improved magnesium alloy
IPC: C22C23/02
Filed: 1936-05-15
Abstract: A magnesium alloy for pistons and other parts of internal - combustion engines and aircraft consists of 70-72 per cent of magnesium, 14-18 per cent of aluminium, 0,1-1 per cent of silicon, 3-8 per cent of antimony, 2-5 per cent of nickel, 0,1-0,5 per cent of chromium, 0,1-1 per cent of manganese, 0,1-0,5 per cent of molybdenum, 6-8 per cent of copper, and 0,1-2 per cent of titanium.
Patent GB-577535-A (GB)
Title: Improvements in or relating to time delay devices
IPC: H01H85/28
Filed: 1943-08-25
Abstract: 577,535. Fusible cut-outs. JOHNSON & PHILLIPS, Ltd., and WIMSETT, S. J. Aug. 25, 1943, No. 13856. [Class 38 (i)] [Also in Group XXXVII] When a fuse blows, a seconc fuse is inserted in the circuit, as in Specification 559,564, by a time delay device com prising a rod 13 having a squared upper end and a pin 43 engaging a helical groove 42 in a surrounding tube 41 which by the descent of the rod 13, is rotated subject tc the drag imparted by friction washers 44 and a spring 45 adjustable by a screw plug 47. The helical part of groove 42 is continued in a straight part 49 which allows the contact 10 rapidly to engage contact 12. The rod 13 is released by the engagement of the falling blown-fuse holder with a tommy bar 18 fixed to a block 50 having a swivel connection at 51 to the rod, the tommy bar 18 engaging in a fixed bayonet-slot 16. A pin 22 is engageable by a pole for re-setting.
Patent GB-370696-A (GB)
Title: Intermediate leaves for the covers of card files with visible titles
IPC: B42F19/00
Filed: 1931-05-11
Abstract: 370,696. Card indexes. DUNLOP, S., 49, Chancery Lane, London.-(Nya Aktiebolaget Galco; 12, Gõvlegatan, Stockholm.) May 11, 1931, No. 13890. [Class 146 (i).] In a card file wherein the cards are perforated and threaded on to card-holders in a cover so that each card is displaced relatively to the next, and wherein intermediate leaves having a plurality of laminar strips on their upper and lower edges are provided to compensate the uneven thickness of the assembled cards in the cover, the majority or all of the laminar strips 2 of flexible material on each intermediate leaf 1 are so placed that they do not reach the perforated edge of the leaf, and therefore avoid contact with the fastening-mechanism of the file. The laminae 2 are secured to the leaf 1 at their outer edges only, preferably by adhesive, and are kept adjacent the leaf by top laminae 2a which extend the whole width of the leaf and are provided with holes 6 for the fastenings of the cover. The laminae 2 are shown as held to the leaf by means of a fly-leaf 7 of the same size as and integral with the leaf 1. The fly-leaf is cut away at 9 to avoid increasing the width at the centre of the file and is provided with holes 6 for the fastenings of the file. The laminae 2 decrease by steps also in the direction of the width of the leaf. The topmost laminae 2a are secured to the perforated edge of the leaf and extend the full width. The intermediate leaf and the laminae may be made from the same or different materials, such as celluloid or the like.
Patent GB-403287-A (GB)
Title: Improvements in or relating to sparking plugs
IPC: H01T13/38
Filed: 1933-05-15
Abstract: 403,287. Sparking-plugs. BOSCH AKT.-GES., R., 4, Militõrstrasse, Stuttgart, Germany. May 15, 1933, No. 14018. Convention date, June 24, 1932. [Class 7 (iv).] The electrode is cemented in the insulator by a silicate cement the water content of which combines in setting with the solid ingredients. A mixture of water glass solution and hydrated silicic acid may be used, the latter being in the form of powdered naturally occurring hydrated flint (SiO2+nH2O) to which powdered silicon or silicon compounds may be added.
Patent GB-514829-A (GB)
Title: Ornamental knot or bow and machine for binding same
IPC: D04D7/10
Filed: 1938-05-11
Abstract: 514,829. Tying bows. ROSENFELDER, O. May 11, 1938, Nos. 14028 and 33877. Drawings to Specification. [Class 112] A ribbon or the like is tied into a bow by drawing it about a portion of cardboard or the like not wider than the ribbon, passing one free end of the ribbon around the other, which may have been folded back to form one arm of a bow, to form' a loop drawing an intermediate portion of said free end through the loop to form a bow and tightening the bow. The cardboard may be withdrawn before or after tightening or not at all. The cardboard may be a portion of a large sheet defined by two slits or by one slit and a larger opening. A machine is described which punches the slits in the cardboard, cuts lengths of ribbon from stock and forms the bows.