baber/WOPTO huggingface dataset:
Patent GB-1087281-A (GB)
Title: Improvements in or relating to tetrahydrofuranyl ethers of í¸-estratriene derivatives
IPC: C07J75/00
Filed: 1966-02-08
Abstract: Novel steroids of the formula <FORM:1087281/C2/1> (wherein R is hydroxy, hydrocarbon carboxylic acyloxy of less than 12 carbon atoms which is optionally substituted, or tetrahydrofuranyloxy; R1 is hydrogen C1- 8 alkyl, C2- 8 alkenyl, C2- 8 alkynyl or C2- 8 haloalkynyl; or R and R1 together are keto; R2 is hydrogen, hydrocarbon carboxylic acyl containing less than 12 carbon atoms which is optionally substituted, C1- 8 hydrocarbon or tetrahydrofuranyl; at least one of R and OR2 being tetrahydrofuranyloxy; and R3 is hydrogen or C1- 8 alkyl) are prepared by (1) reacting estrone or an 18-alkyl-estrone with dihydrofuran in presence of an acid catalyst and, if desired, converting the product to a 17a -(unsubstituted or substituted)-17b -ol by conventional methods; (2) reacting the 17b -ol products of (1) or a 3,17b -dihydroxy-D 1,3,5(10) -estratriene with dihydrofuran to give the 3,17b  - di - tetrahydrofuranyl ethers; (3) reacting a 3-hydroxy-17b -aryloxy-D 1,3,5(10)-estratriene with dihydrofuran and, if desired, hydrolysing the product to a free 17b -ol; (4) reacting a 3-acyloxy- or 3-hydrocarbonoxy-17b  - hydroxy - D 1,3,5(10)-estratriene with dihydrofuran and, if desired, hydrolysing the product and reacting the free 3-ol with dihydrofuran to give a di-ether as in (2).  17a ,18 - Dialkylestradiols are prepared from the 17-ones and alkyl Grignard reagents.  The use of alkali metal alkynes gives 17a -alkynyl-18-alkyl-estradiols which on reduction give 17a -alkenyl - 18 - alkyl estradiols.  Esterification of 18-alkyl-estrones and 18-alkyl-17a -R1-estradiols gives 3-esters thereof, e.g. acetates, and etherification gives 3-ethers, e.g. methyl ethers.  Estrone and 18 - alkyl - estrone 3 - ethers and - esters are reacted with 1,2-dihalo-ethylenes and methyl lithium to give 17a -haloethynyl-(estradiol and 18 - alkyl - estradiol) - 3 - ethers and -esters, and the last-named are hydrolysed to the corresponding free 3-ols.  The use of trifluoropropynyl magnesium bromide gives 17a -trifluoropropynyl - (estradiol and 18 - alkyl-estradiol)-3-ethers, and the corresponding free 3b -ols are prepared similarly, and are esterified to 3-esters.  Esterification of 17a -substituted-estradiols and -18-alkyl-estradiols with an acid e.g. acetic acid, and its anhydride in the presence of p-toluenesulphonic acid gives 3,17-diesters, e.g. diacetates, which on hydrolysis give the 17-mono-esters.
Patent GB-974451-A (GB)
Title: Method for controlling flux pressure during a sintering process
IPC: C04B35/547
Filed: 1963-02-11
Abstract: <PICT:0974451/C1/1> <PICT:0974451/C1/2> In a sintering process, the vapour pressure of the flux used is maintained substantially constant so that the flux concentration does not decrease during the process and affect the sintering. Preferred materials are photo-conductors such as CdSe and CdS or a solid solution of both using CdCr2, CdBr2 or CdI2 as fluxes. Numerous examples are given utilizing these materials, the sintering treatments involving heating to temperatures between 522 DEG  and 600 DEG  C. for 5-20 minutes in an atmosphere of 0.2 to 1.7% O and the rest N and the mixtures having between 5 and 20 mol. per cent flux; grain sizes between 4 and 15 m  result.  Copper may be added as an impurity.  The vapour pressure is maintained either by using a small volume container or by providing an auxiliary source for vapour consisting merely of the flux material or alternatively using a second supply of the mixture which is being sintered.  This auxiliary source may be covered with a layer of Al2O3 which acts as a molecular sieve to govern the rate of evaporation. Fig. 3 shows a suitable small volume inner container 10 which is closed by a substrate 11 carrying on its inner surface the material to be sintered.  The container is carried on an endless chain 6 in the heating apparatus shown in Fig. 2 which comprises a glove box 1 and furnace 12. Means are provided for circulating and controlling the atmosphere.  When only small quantities of flux are used which are insufficient to fill the container with vapour without affecting the residue, secondary sources of flux vapour are provided in the bottom of the container 10.
Patent GB-1536891-A (GB)
Title: Ophthalmic lens for presbyopia and aphakia
IPC: G02C7/02
Filed: 1976-02-12
Abstract: 1536891 Opthalmic lens D VOLK 12 Feb 1976 05486/76 Heading G2J A spectacle or contact type lens is semi-finished in such a way that failing or absence of accommodation in presbyopia and the lack of accommodation in aphakin is accomplished in a continuous and regular manner, without discontinuities in the field of vision through the lens, and with minimal  distortion in the field. The design of the lens is such that, in gazing at distant objects through the upper portion of the lens as it is worn, vision is clear and as objects are observed through lower and lower portions of the lens they must be closer and closer to the wearer to be seen clearly. Such continuous and regular increase in refractive power from the upper distance portion to the lower border results from the combination of a back surface which is either conicoid with an eccentricity of greater than or equal to zero or toric (a toric back surface being used when ocular astigmation is to be corrected) and a front surface which increases in curvature continuously and regularly in an accelerated manner from said upper portion to provide an increasing refractive power for the correction of the accommodative insufficiency or absence of accommodation.
Patent GB-309678-A (GB)
Title: Improvements in signs
IPC: G09F13/14
Filed: 1928-02-21
Abstract: 309,678. Winter, C. J. Feo. 21, 1928. Prisms, rotating; illumination, changing advertisements by controlling. - In signs having an inclined mirror whereby light is reflected either before or after passing through a stencil, a number of differently coloured mirrors are mounted on the sides of a prism which is rotated step-by-step or continuously so as to bring each mirror in turn into the inclined position. Fig. 1 shows an inclined stencil 1 illuminated in sequence by mirrors 5 on a hand-rotated polygonal carrier 3 registered by a pawl 6. The mirrors may be of silvered glass, tinsel paper, foil, sheet metal, &c. and each may be uniformly coloured or have bands &c. of different colour. The sign may be double-sided, and Fig. 3 shows such a sign having two carriers 3 connected together by a belt 11. Fig. 4 shows stencils 1 illuminated by the mirrors on a power-driven carrier 3. An elongated lamp may be fitted along the upper front edge of the casing for use at night.
Patent GB-977911-A (GB)
IPC: C07D473/34
Filed: 1962-02-13
Abstract: 977,911. Induction flowmeters. ETABLISSEMENTS NEYRPIC, and LABORATOIRE D'ELECTRONIQUE ET D'AUTOMATIQUE DAUPHINOIS. Feb. 13,1962 [Feb. 14, 1961], No. 5536/62. Heading G1N. In a flowmeter comprising a rectangular pipe section 1 passing through apertures in the ends 5, 6 of a rectangular yoke 3, 4 an alternating magnetic field is created within the pipe by poles N.S. and the currents in the liquid resulting from its movement induce a signal whose simplitude is proportional to the rate of flow in windings 21-24 through additional poles P situated between each pair of magnetising poles. The flow is indicated in a meter 35 and compensation for the effects of parasitic fields is provided by a circuit comprising a transformer 17 potentiometers 27, 19 and a capacitor 18 which are set to produce a zero output when there is no flow. The pipe which is non-magnetic has an electric conductivity lower than that of the liquid e.g. metal flowing through it, and the smaller sides may be lined with copper. The yokes are of luminations, and an additional coil may be provided to monitor liquid resistivity for compensation purposes.
Patent GB-874641-A (GB)
Title: Making pipes
IPC: B21C37/12
Filed: 1959-02-19
Abstract: 874,641. Coiling helically-jointed tubes. REUSS BERGBAU-UND INDUSTRIEBEDARF G.m.b.H. Feb. 19, 1959 [Feb. 11, 1958], No. 5801/59. Classes 83 (2) and 83 (4). Metal strip is helically coiled to form a tube by a reciprocating or oscillating bender. Sheet metal strip 2 is fed, intermittently by roller or endless chain means on a frame 16, to an abutment 7 and is coiled therearound by a bender 4 reciprocated, for example by crank means, to form a tube 12. The strip 2 may come from a coil through straightening means and may be preheated by induction heating or a burner. The angle of feed of the strip 2 may be varied by moving the frame 16, on rollers 17, about a pivot 15 or by angularly moving the coiling means relatively to the feed means. Instead of being perpendicular to the plane of the strip the bender 4 may be movable radially of the tube 12 at an angle to the said plane. The bender 4 may be arranged on the end of a pivotable arm. The strip may be negatively pre-bent by ram means against a ridge on the feed table in front of the abutment 7. The coiled tube is guided by rollers 20 on a frame 23 pivoted at 22 and the helical seam is welded, e.g. by submerged arc welding at 21. The welding device may be carried by the frame 23. In a modification, Fig. 4, a bender 40 inside the formed tube 12 reciprocates to bend the strip 2 in co-operation with adjustable abutments 26, 27. In another modification, Fig. 5, the strip is bent by a curved member 29 pivoted about an adjustable pivot 30 and rocked by toggle means 32, 33.
Patent GB-388571-A (GB)
Title: Improvements in or relating to moving coil a.c. voltage regulators
IPC: H01F29/12
Filed: 1932-02-26
Abstract: 388,571. Induction regulators. FERRANTI, Ltd. and PORTER, G. L., Hollinwood, Lancashire. Feb. 26, 1932, No. 5851. [Class 38 (ii).] An induction regulator of the type in which the secondary voltage is varied by movement of short-circuited coils comprises a magnetic core of which the limb carrying the windings is divided longitudinally into parts x, y surrounded by a common primary winding P and one or each of them carrying a secondary winding Sa, Sb. Short-circuited coils Ca, Cb are provided one on each core part and on opposite sides of the secondary windings. The coils Ca, Cb are coupled for simultaneous movement and since they cause the flux to pass from the core part x to the core part y in the space between them, the ratio of the proportion of the total flux linking the secondary Sa to the proportion linking the secondary Sb may be varied according to the position of the coils Ca, Cb. With these coils in the uppermost position, substantially all the flux links with the winding Sb giving maximum voltage in one sense and with the coils in the lowermost position substantially all the flux links with the winding Sa giving maximum voltage in the opposite sense, the windings Sa, Sb being connected in series opposition. When voltage boost in one sense only is required, a single secondary on one of the limbs may be employed. The regulator may be used in conjunction with a three-phase transformer, one of the yokes of the latter being divided as shown in Fig. 2 to accommodate two sets of regulating windings which are associated with two phases of a delta-connected secondary as shown in Fig. 3. Specification 341,903 is referred to.
Patent GB-1384544-A (GB)
Title: Metl spinning extruders
IPC: D01D5/08
Filed: 1971-03-03
Abstract: 1384544 Melt spinning extruder JAMES MACKIE & SONS Ltd 2 June 1972 [3 March 1971 5916/71 Heading B5B A melt-spinning extruder has a high pressure pump 1 of the double screw type for feeding material to be extruded to a die head 24 comprising at least two thousand orifices arranged in an array of length at least three times, preferably nine times, as great as its width. Granules or powder, e.g. of coloured polypropylene, supplied from hopper 2 are melted before leaving the pump chamber 3, of circular cross-section, and the melt passes through a constriction in the form of a breaker plate 4 having a large number of small holes. The resistance to flow provided by the plate 4 develops a relatively high pressure at the pump 1 which assists the mixing of the melt. The melt then passes through the connecting passage 8, having an initially circular cross-section 6, widening into a chamber of rectangular crosssection, which leads to extrusion chamber 10, also of rectangular cross-section. Irregularities in the flow of material, caused by the fact that material at the left hand side of portion 8 of the passage has to travel round a wider curve than that on the opposite side are compensated by a pair of opposing constructor bars 18 fitted close to the entry to chamber 10, controlled by a series of screws 20 fitted along their length. By relative adjustment of the screws along the length of each bar, the shape of the bar, i.e. the degree of bowing, is adjusted to obtain an even flow across the width of the cross-section. Extrusion chamber 10 is divided into two by a central bullet-shaped partition 22 so that the melt is divided into two streams leading to two separate die plates 24, of rectangular shape with a 9 : 1 length/width ratio, each plate having 12,000 orifices. The emerging filaments 25 are cooled by air ducts 26. Owing to the relatively narrow width of the array of orifices and the relatively slow speed of filaments leaving the die head, cooling occurs over a length of only a few millimetres, so that air speeds as high as 50 m./sec. may be used without the filaments stickeing together. In place of a helical feed screw pump, another type of high pressure pump, e.g. a gear pump, may be used, and a single feed pump may be used to supply a number of separate die heads.
Patent GB-102568-A (GB)
Title: A New or Improved Toy.
Inventor: ISAACS JOSIAH
IPC: A63H3/04
Filed: 1916-04-25
Abstract: 102,568. Isaacs, J. April 25, 1916. Animals, dolls, and figures; mechanical and like toys-A toy consists of a coiled spring d the lower end of which is secured to a flat wooden disk a forming a base, while to the upper end a stuffed head f representing the head of an animal, golliwog, &c. is attached, the spring being covered with flexible material g, such as imitation fur, skin, plush, &c., to form the body. The spring d is preferably of larger diameter at the base than at the top. Flexible arms h and feet i are provided. On depressing the head f, the figure jumps, and the contact of the base a with the table &c. produces a noise similar to a clog dance.
Patent GB-930731-A (GB)
Title: A high-voltage circuit breaker with a gas evolving breaker chamber
IPC: H01H33/77
Filed: 1960-02-19
Abstract: 930,731. Gas-blast switches. LICENTIA PATENT - VERWALTUNGS - G.m.b.H. Feb. 19, 1960 [Feb. 19, 1959], No. 5964/60. Class 38 (5). An arc-extinguishing chamber formed as an open-ended slot in gas-evolving material has resilient walls which yield at high-arcing pressures and re-assume their original shape as the pressure falls. Contacts (not shown) separate within the chamber 2 of synthetic resin (such as an epoxy resin) reinforced with fibre-glass. The chamber is lined with gas-evolving material 1 and is mounted on a U-shaped frame 3 of synthetic resin reinforced with fibre-glass. The slot may be annular.
Patent GB-540109-A (GB)
Title: Improvements relating to dynamo regulators
IPC: H02J7/22
Filed: 1940-04-03
Abstract: 540,109. Automatic control systems for dynamos. C.A.V., Ltd., and BEVIS, W. A. April 3, 1940, No. 6004. [Class 38 (iv) ] Voltage; current.-In a system comprising a dynamo a and battery d particularly for road or rail vehicles, wherein means m n, are provided to suppress oscillations likely to inter fere with radio, the voltage winding j of the vibratory dynamo regulator is con. nected to at least one terminal of the battery and the connection includes an oscillation filter o, p. When both ends are connected tc the battery the other connection includes also interrupter contacts q operated by the cut-out. This second connection may be made, as shown in Fig. 1, through the current coil f of the cut-out, and the current coil h of the regulator and a suppressor choke m, or direct to the battery terminal through an additional oscillation filter. The invention is stated to increase the time of constant-current charging as well as permitting smaller chokes in the main circuit.
Patent GB-701562-A (GB)
Title: Improvements in and relating to sealing terminations for electric cables
Inventor: BRYCE STANLEY JAMES
IPC: H01R4/58
Filed: 1952-03-07
Abstract: 701,562. Cable-end sleeves. BRITISH INSULATED CALLENDER'S CABLES, Ltd. March 6, 1953 [March 7, 1952], No. 6051/52. Class 36 The end of a metal-sheathed cable is sealed by means of a cylindrical body 4, one end of which fits over and is secured to the cable sheath 1, the other end being closed by an insulating disc 6 which has an aperture for the passage of each of the cable conductors 2 and their flexible insulating sleeves 8, the material of the disc 6 being relatively harder than that of the sleeves 8, and the end 9 of each sleeve being held in an aperture by an adhesive. The body 4 may be screw-threaded on to the sheath 1 and packed with insulating compound 5. The sleeves and disc may be made of polyvinyl compounds, and after being stuck together are threaded over the bared ends 2<SP>1</SP> of the conductors. The disc is pressed against the compound 5 and held by turning the rim 7 of body 4 inwardly.
Patent GB-1214746-A (GB)
Title: Precision interferometer navigation system
IPC: B64D45/00
Filed: 1968-02-07
Abstract: 1,214,746. Radio navigation. WESTING- HOUSE ELECTRIC CORP. 7 Feb., 1968 [9 March, 1967], No. 6122/68. Heading H4D. In one aspect a beacon produces respective spectra Fig. 2 from aerials 11, 12, 13 where "f.m." is frequency modulation. In another aspect an equivalent result at a distant receiver is afforded using two aerials, Fig. 6 (not shown). The system resolution i.e. electrical degrees of phase/spatial degrees is made high by making aerial spacing wavelength high e.g. 40. Azimuth and elevation systems may be provided for aircraft landing, Fig. 1 (not shown). Receiver, Fig. 7. The combined received signals are passed to a mixer 52 in a phaselocked loop to effect automatic tuning; a mixer 61 translates its input to a carrier frequency suitable for a known V.O.R. receiver.
Patent GB-557417-A (GB)
Title: Improvements in or relating to devices or appliances for use in the straining or stretching of skins, hides, pelts, or the like
IPC: C14B1/26
Filed: 1942-05-07
Abstract: 557,417. Clips. WILSON, E. G. May 7, 1942, No. 6141. [Class 44] A clip device for use in stretching skins &c. comprises a wooden body a provided with a finger-hole b and having its upper surface formed to provide an anvil position a' and recess a<2>. The rear end has a finger-recess c and the lower surface, which is preferably flat, has a screw d, a metal plate with a projecting tongue, or other projecting means for selective engagement with an aperture or mesh in the usual frame or support to hold the skin taut. A single-piece metal pressing, formed to provide side arms f<1> and cross-bar the edge f<2> of which grips the skin against the part a', is pivoted to the body on a bolt or spindle e and biased to gripping position by a wire spring mounted on the bolt with the end of one arm g' anchored in the body a and the other arm g<2> engaged behind an integral tongue f<4> formed on the side arm f<1> The edge f<2> may be toothed and an additional plate (or plates) may be secured to the crossbar disposed so that its edge co-operates with the edge f<2> in gripping the skin h. The gripping edge of this plate may have teeth out of register with those on the edge f<2>. The upper edge f<3> of the cross-bar may be lipped to give rigidity.'
Patent GB-975903-A (GB)
Title: Improvements in and relating to the production of pressure sensitive tapes
IPC: C09J7/50
Filed: 1961-02-20
Abstract: A primer composition for use in the making of pressure-sensitive tapes comprises polychloroprene, an organic isocyanate and an organic peroxide catalyst.  Exemplified isocyanates are methylene bis (4-phenyl isocyanate) and di-anisidine di-isocyanate.  Exemplified peroxides are benzoyl peroxide and cumene hydroperoxide. The polychloroprene may be mixed with other rubbers; for example nitrile rubber and crude rubber. Other ingredients such as phenol aldehyde resins and curatives for the resins and the rubbers may be added. The compositions are preferably dissolved in a volatile solvent such as toluene.ALSO:A pressure-sensitive adhesive tape comprises a backing such as polyester film, paper tape, impregnated paper and cotton fabrics coated with a primer composition which comprises polychloroprene, an organic isocyanate and an organic peroxide as catalyst. Exemplified isocyanates are methylene bis(4-phenyl isocyanate) and dianisidine di-isocyanate.  Exemplified peroxides are benzoyl peroxide and cumane hydroperoxide.  The polychloroprene may be mixed with natural rubber or nitrile rubber.  Other ingredients such as phenol aldehyde resins, curatives and antioxidants may be present.  The primer composition is preferably spread on the backing as a solution in a solvent such as toluol.  Known adhesive masses may be spread on top of the primed tape and the whole cured.
Patent GB-546960-A (GB)
Title: Improvements in accelerators of vulcanization
IPC: C07D277/76
Filed: 1940-05-21
Abstract: 546,960. Substituted ethers. UNITED STATES RUBBER CO. May 21, 1940, No. 6309/42. Convention date, June 24, 1939. Divided out of 545,696. [Class 2 (iii)] [Also in Group V] A compound of the type ROX, where R is an arylene-thiazyl sulphide group and X is alkyl, aryl or R, is made by adding chlorine to 1,1<SP>1</SP>- dithio bisbenzothiazole in carbon tetrachloride and stirring the product with water while heating. Compounds of the type benzothiazyl ethoxy and phenoxy sulphide, the O-alkyl or O-aryl group being joined to the thiol sulphur atom, are produced when an alcohol or phenol, or alcoholate or phenolate, is caused to react with the arylene-thiazyl sulphur chloride.
Patent GB-1410317-A (GB)
Title: Thiophenols
IPC: C07B61/00
Filed: 1974-02-12
Abstract: 1410317 Thiophenols SOC NATIONALE DES PETROLES D'AQUITAINE 12 Feb 1974 [16 Feb 1973] 06388/74 Heading C2C Thiophenols are produced by heating the corresponding cyclohexylmercaptan in a vapour state with sulphur dioxide at 300‹ to 800‹ C. in contact with a dehydrogenation catalyst having a specific surface area of at least 300 square metres per gram.
Patent GB-1490018-A (GB)
Title: Amusement rides
IPC: A63G21/10
Filed: 1975-02-14
Abstract: 1490018 Amusement rides ARROW DEVELOPMENT CO INC 14 Feb 1975 [19 Feb 1974] 6397/75 Heading A6M An amusement ride comprises passenger carrying vehicles 11 a pair of rails 13 and 15 fixed with respect to the ground to carry and guide the vehicles 11 over a predetermined path a portion of which, between 25 and 27, follows a helical shape extending an axial length corresponding to at least one cycle of the helix and the helices of the rails 13 and 15 being congruent and having a common substantially horizontal axis with respect to the ground. In a preferred embodiment a passenger loading station 17 is located at the foot of a steep upgrade portion 19 of track up which the cars are mechanically assisted whereafter they enter a descent 23 leading to the helical portion beginning at 25 and ending at 27, transition sections 33 and 35 providing smooth entry and exit therefrom. The rails 13 and 15 (Figure 5) are connected at intervals by brackets 47 and 49 at their outer and facing sides with respect to the track to a support rail 43 which is anchored to the ground at intervals by posts 45 and follows a similar helical path, but of larger radius than that of the rails, this path having a pitch angle of between 40 and 90. A part of the cars may project below axis of wheels 55 and 57 toward the support rail 43 to lower the centre of gravity of the cars with respect to the rails and each car has a cluster of three wheels 55, 57 and 59 on each side, the wheel 59 contacting the underside of the rail with respect to the car to retain the car in contact with the rails in the event of accidental speed reduction in the helical region of the track. Additionally wheels are provided to contact the inside of the track.