baber/WOPTO huggingface dataset:
Patent GB-1011978-A (GB)
Title: Photographic silver halide emulsions of increased sensitivity
IPC: G03C1/10
Filed: 1962-05-28
Abstract: Poly - (1,3 - dicarbomethoxy - 2 - butanone) having the formula shown in Fig. 15 is prepared by adding a few drops of piperidine to a cooled solution of dimethyl - b  - oxoglutarate and aqueous formalin in methanol.  <FORM:1011978/C3/1> <FORM:1011978/C3/2> Poly - (ethylene - a ,a 1 - diacetyl - glutarate having the formula shown in Fig. 16 is prepared Poly - (ethylene - a a 1 - diacetyl - glutarate) having the formula shown in Fig. 16 is prepared by allowing a solution of ethylene bisacetoacetate and aqueous formalin in ethanol to stand for four days at room temperature.ALSO:Compounds of the general formula R1-CO-CH(R)-CH(R2)-CH(R)-CO-R1 wherein R is hydrogen or an aliphatic carboxylic acyl radical or a group of the formula -CONR6R7 (where R6 and R7 are hydrogen or alkyl, cycloalkyl, aralkyl, aryl, substituted aryl heterocyclic groups or together complete a heterocyclic ring, or R6 is H and R7 is NH2), R1 is alkyl, alkoxyl or hydrazino and R2 is hydrogen or alkyl, are prepared by reacting an aldehyde R2CHO with a reactive methylene compound of the formula R1-CO-CH2-R. Examples are given of the reaction of formalin with reactive methylene compounds in which R1 is methyl, ethyl, pivalyl, methoxy, ethoxy or hydrazino, and R is hydrogen, acetyl, propionyl, carbomethoxyacetyl, CONR6R7 where R6 and R7 complete a piperidyl ring, or -CONH2 which may be unsubstituted, di-substituted with methyl or ethyl groups or by a methyl and a phenyl group, or mono-substituted by phenyl, tolyl, methoxyphenyl, trimethoxyphenyl, carboxyphenyl, sulphophenyl, fluorophenyl, ethyl butyl, benzyl, phenethyl, cyclohexyl, a -pyridyl (or its methyl p-toluene sulphonate), or NH2. Examples also are given of the reaction of acetaldehyde with reactive methylene compounds in which R1 is methoxy or ethoxy and R is acetyl or carbomethoxyacetyl.
Patent GB-136242-A (GB)
Title: An Improved Bolt or Pin.
Inventor: HENDERSON ARTHUR HENRY
IPC: F16B21/12
Filed: 1918-12-09
Abstract: 136,242. Henderson, A. H., and Okell, J. Dec. 9, 1918. Elliptic and semielliptic springs. - A self-locking pin or bolt suitable for springs, shackles, &c. comprises a pin B having a split end b<2> formed as a shouldered cone. This is inserted in a socket A, and the prongs formed by the slit end snap over the enlarged end a of the socket. A suitable tool D, Fig. 4, may be employed for contracting the split end so that the pin may be withdrawn. A set-screw or pin may be inserted in the split end to render the appliance solid, or a second split member may be inserted through the member B for this purpose.
Patent GB-994073-A (GB)
Title: Improvements in or relating to improved expandable polymers
Inventor: POTTENGER CARL HAXTON
IPC: C08J9/16
Filed: 1961-06-06
Abstract: Ingredients of a storage-stable expandable thermoplastic composition are particles of thermoplastic synthetic resin having incorporated therein a normally non-solid organic blowing agent, and one component of a two-component solid blowing agent adjunct, which can produce carbon dioxide and water when the two components are reacted together.  A mixture of the two kinds of particle from the storage-stable expandable composition, or such a composition may comprise a mixture of one kind of particle with particles of synthetic resin which contain the complementary component of the two-part blowing agent adjunct but no organic blowing agent. Suitable thermoplastic resins are polystyrene or copolymers of styrene with another monomer.  Suitable organic non-solid blowing agents are aliphatic hydrocarbons boiling below the softening point of the polymer and preferably between 20 DEG  and 100 DEG  C., e.g. pentane, hexane, heptane, cyclopentane, cyclopentadiene.  Other suitable substances are acetone, methyl alcohol, methyl acetate, ethyl acetate, methyl formate, ethyl formate, dichlorethylene, isopropyl chloride, propionaldehyde, dipropyl ether, methyl chloride, dichloroethane, or dichlorodifluoromethane. Suitable as one component of the blowing agent adjunct are carbonates and bicarbonates of the alkali and alkaline earth metals or ammonia, and as the other component boric acid, or an organic acid, e.g. oxalic, citric, malonic, maleic, fumaric, succinic, itaconic, citraconic, malic, adipic, tartaric, phthalic, chloroacetic, diglycollic, stearic, oleic, caprylic, benzoic, benzenesulphonic or toluenesulphonic acid. Acid salts, e.g. potassium hydrogen tartrate are also suitable.  The particles are formed in a conventional extruder, extrusion being followed by rapid quenching to prevent expansion, e.g. by extrusion into a water bath as in Specification 994,074 or by using insulated dies through which refrigerant is circulated.  In the subsequent moulding operation of the expandable composition the polymer becomes fluid, the organic blowing agent expands and the components of the blowing agent adjunct react to form carbon dioxide and water, thus producing the expanded article.  Specification 783,034 and 854,586 also are referred to.
Patent GB-810223-A (GB)
Title: Improvements in or relating to clothes-horses
Inventor: CLEGG JOHN
IPC: A47F7/24
Filed: 1956-07-03
Abstract: 810,223. Clothes-horses. HOME-EASE Ltd. July 1, 1957 [July 3, 1956; Nov. 29, 1956], Nos. 20512/56 and 36477/56. Class 52(5) A clothes-horse comprises upright frames varying- in width from top to bottom and horizontal rails pivotally secured to the frames at points of differing widths so that each set of rails and the associated frames fold and unfold with a parallelogram action about vertical axes and clothes hanging on an upper rail of the erected horse do not rest on those on a lower rail. As shown, a clothes-horse has three frames 10, 11, 12, formed by metal tube or bar elements 13, 14, 15 and rails 20, 21, 22 pivotally secured to the frames by hollow spigots 24, apertured plates 23, and pegs 28. A coupling member 32 secured to a rail 20 of each set and slidably engaged with the element 13 of the central frame moves the sections of the horse in unison to fold flat and against each other. The rails are covered with ribbed plastic tubing and in modifications the spigot 24 and plate 23 are replaced by a plastic moulding. The clothes-horse may consist of one or of more than two sections.
Patent GB-1478571-A (GB)
Title: Method of dissolving non-ferrous metals contained in a sulphide ore or concentrate
IPC: C22B19/20
Filed: 1975-05-15
Abstract: 1478571 Treating sulphide ores SOC MINIERE ET METALLURGIQUE DE PENARROYA 15 May 1975 [15 May 1974] 20571/75 Heading ClA Non-ferrous metals contained in a sulphurized ore or concentrate are selectively dissolved by a method which comprises lixiviating the ore or concentrate with an aqueous cupric chloride solution and regenerating cupric ions from the cuprous ions formula in the solution, preferably in situ by means of gaseous oxygen, preferably air at atmospheric pressure, together with HCl and/or FeCl 2 . The redox potential is preferably 400-800 mV w.r.t. the hydrogen electrode, and the pH is # 1 when HCl and FeCl 2  are both present and # when HCl alone is used. The metals dissolved may be copper, lead or zinc. Gaethite (FeO.OH) is precipitated in the regeneration step when iron is present.
Patent GB-187733-A (GB)
Title: Improvements in or connected with parachutes
IPC: B64D17/52
Filed: 1921-08-02
Abstract: 187,733. Potter, J. Aug. 2, 1921. Parachutes.-A parachute is provided with a rigid frame connected to the mouth by frangible means which hold the mouth partly open after the parachute is completely discharged from its container until the rigging lines are completely extended and the internal pressure reaches a predetermined limit. Fig. 1 shows the parachute after it has left its container and with the rigging lines 14 completely extended. A breakable string is passed through the loops which secure the lines 14 to the fabric and through eyelets on a metal frame 12, which may be of rectangular, circular, oval, D-shape or other form. The frame is suspended by a cord 18 from the apex 19 of the parachute which has a ring of sector shaped gussets looped around a central grommet so that the gussets are bunched together by the pull of the cord 18 to close the aperture. Branch cords 20 are connected to the breakable string so that when the predetermined pressure is reached the string is broken and the frame 12 remains suspended from the apex 19 which assumes its normal open form. The portion of the cord 18 below the branch cords 20 is initially slack to enable tension to be put on the cords 20. The parachute is packed in a case corresponding in shape to the frame 12, the apex of the parachute lying against the base x, Fig. 6, of the casing and the rigging lines 14 being arranged over the frame 12. Four triangular flaps z are folded over the packed parachute and the apices laced together by a breakable cord passed through the eye which connects the rigging lines 14 to a life-line 32. The life-line 32 is folded over the flaps z and a second similar casing is pulled over the first one and its flaps folded over the base x and laced together by a breakable cord passing through a ring which connects the base x of the first casing to a cord 33 connected to an aircraft. The base of the second casing is provided with shoulder straps 31 for securing it to an aviator's back. When the aviator jumps overboard, the cord 33 breaks the lacing of the second container and withdraws the first container therefrom. The life-line 32 then breaks the lacing of the first container, extends the rigging lines 14, and withdraws the parachute, which falls with its mouth held by the frame 12 until the predetermined internal pressure is reached.
Patent GB-1001400-A (GB)
Title: Process for production of propionitrile
Inventor: SMEYKAL KARL
Filed: 1964-05-19
Abstract: Propionitrile is produced by reacting ammonia and propionaldehyde in a molar ratio of 2-5: 1 at 350-500 DEG  C. in the presence of a catalyst consisting of 30-40% by weight of chromium oxide and 70-60% by weight of zinc oxide.  The propionaldehyde used may be the crude product of boiling range 40-100 DEG  C. obtained from ethylene, CO and hydrogen in the presence of a cobalt carbonyl.
Patent GB-782655-A (GB)
Title: Improvements in or relating to steam turbine installations
Inventor: FORSYTH GEORGE HOWARD
IPC: F01K15/04
Filed: 1954-07-14
Abstract: 782,655. Turbine plant. VICKERS-ARMSTRONGS (ENGINEERS), Ltd. Feb. 22, 1955 [July 14, 1954], No. 20598/54. Class 110 (3). A steam turbine plant comprises a boiler feeding steam to a first turbine through a single change-over valve in a first position which valve may be moved into a second position in which the boiler steam is passed via the valve through an independently fired superheater to a second turbine which exhaust into the inlet of the first turbine, the arrangement being such that in the first position of the valve the main steam supply to the second turbine is cut off and in the second position the direct supply of steam to the first turbine is cut off. The main boiler plant 1 delivers steam through an ahead manoeuvring valve 2 and a changeover valve 3 to the inlet 4 of a high pressure ahead turbine or turbines 5 which exhaust to a condenser 7. A branch pipe 8 and manoeuvring valve 10 lead to an astern turbine. In a second position of the change-over valve 3 steam is directed through an independently fired superheater 11 to a turbine 12 which exhausts through a non-return valve 14 to the inlet of the turbine 5. The output shaft of the turbine 12 is connected through a clutch 16 to a pinion 17 meshing with one of the gears of the reduction gear (not shown) of the turbine 5. The clutch 16 may be omitted and the casing of the turbine 12 connected to the condenser 7 through a valve 19 to reduce the windage losses when this turbine is out of operation. The turbine 12 is preferably arranged, in this case, in tandem with the turbine 5. A by-pass valve 18 across the manoeuvring valve 2 and change-over valve 3 is provided to allow a small flow of warming steam through the independently fired superheater 11 and turbine 12 when this part of the plant is out of operation. The capacity of the burners of the independently fired superheater 11 is such that the tubes of the superheater do not become overheated when only the warming steam is supplied to the turbine 12. Combustion control gear (not shown) is provided to control the steam, fuel and air supplies to the superheater 11 to give a constant steam temperature over the load range required and during operation of the changeover valve 3. In a modification the turbine 12 has a double casing and the steam from the boiler passes through the outer casing to the superheater 11. Specification 782,658 is referred to.
Patent GB-925214-A (GB)
Title: A step and repeat contact printing apparatus
Inventor: WAGNER GEORGES
IPC: G03B27/06
Filed: 1960-06-10
Abstract: 925,214. Step and repeat contact printing apparatus. TECHNIQUE APPLIQUEE. June 10, 1960, No. 20603/60. Class 98 (1). Described for repeat printing in register of five colour separations, the apparatus comprises a base block 1 mounted in a main frame 2 and carrying fixed to the block an auxiliary frame 2a containing transparent plate 2<SP>1</SP>p adapted to carry a reference print and which may be illuminated from underneath. The base block 1 supports a main carriage comprising parallel bars 5, 5<SP>1</SP> running stepwise along rack 4 and scale bar 4<SP>1</SP>, and the main carriage supports a secondary carriage having rectangular frame 9 running stepwise between the bars 5, 5<SP>1</SP> and providing a photographic chamber 9a, the axis of which is perpendicular to the base block 1, and which serves as negative or plate holder and contains a shutter and light source for the printing. In use a reference print which may be a positive is mounted in the auxiliary frame 2a, and a negative is placed in the frame 9 at a time when the chamber 9a is removed therefrom and centred over the positive by hand, both carriages being slid to appropriate positions for this, chamber 9a is then replaced, sensitive material 3a is placed in the main frame 2 and a series of exposures is effected. Chamber 9a is now removed again, the next negative of the set is placed in the frame 9, centred over the positive and printed in superimposition on the first set without further registration, and so on for all the separations.
Patent GB-305907-A (GB)
Title: Improvements in or relating to chucks
IPC: B23B31/20
Filed: 1928-07-19
Abstract: 305,907. Moss Gear Co., Ltd., and Gregory, E. July 19, 1928. Chucks.-A hollow spindle chuck has the bevel closed jaws 3 connected loosely at 3a for actuation by a sleeve 4 traversed by a nut 5 confined between the end of the spindle 2 and a two-part screw cap 6, 7 with an interposed thrust bearing 8. Relative rotation between the cap 6, spindle 2 and sleeve 4 is prevented by a screw 10. Tommy holes 5a accessible through slots in the cap provide for the actuation of the nut.
Patent GB-1146977-A (GB)
Title: Circuit arrangement for controlling the speed of a d.c. commutator motor
Inventor: MERRETT John
IPC: H02P7/29
Filed: 1965-05-18
Abstract: 1,146,977. Switching circuits. MULLARD Ltd. 28 March, 1966 [18 May, 1965], No. 20969/65. Heading H3T. [Also in Divisions G3 and H2] A motor 11, 12, e.g. in an automatic washing machine, is energized from a full wave rectifier via a thyristor 24 which is triggered by the discharge of a capacitor 38 through a transistor 36 at a firing angle determined by the charging rate of the capacitor which is varied in steps by switched resistors 62, 63, 64 to provide, e.g. three speeds. The transistor collector and base are transformer coupled to provide a regenerative circuit and the triggering pulse is developed in an additional winding 35 on this transformer. The charging circuit supply is stabilized by a Zener diode 51, and the resistor corresponding to top speed 64 is a thermistor to limit the acceleration when this is selected. At the two lower speeds the charging rate of the capacitor is modified by the back e.m.f. of the motor in a diode/resistor circuit 4 so as to keep the selected speed constant. The charging rate is also modified by a current limiting circuit; this comprises a transistor 71 in series with the capacitor and normally fully conducting, but if the motor current becomes excessive the transistor is biased to become progressively less conductive.
Patent GB-477785-A (GB)
Title: Improvements in and relating to shafts for golf clubs
IPC: A63B53/00
Filed: 1936-07-29
Abstract: 477,785. Golf clubs. TURNER, J. H. July 29, 1936, No. 21010. [Class 132(ii)] The shaft of a golf club comprises a metal mainshaft portion 5 and a wooden portion 4 extending lengthwise therefrom and secured thereto to form a handle which is slitted or bored longitudinally from its upper end to a point 8 above the upper end of the metal shaft and is filled with resilient material 7 such as rubber, cane, or spring steel. Various shapes of handles may be used and a plurality of slits may be provided, each slit lying in a plane substantially parallel to the face of the club.
Patent GB-591449-A (GB)
Title: Improvements in magazine talking machines
IPC: G11B17/22
Filed: 1943-12-15
Abstract: 591,449. Magazine gramophones. KOSH, T. H., and WRIGHT, S. J. Dec. 15, 1943, No. 21052. [Class 40 (ii)] Relates to magazine gramophones of the kind in which the records are carried in trays and supported by a vertical post about which the trays can be individually swung out of the magazine to position the desiied record above a lowered turntable, or one of a number of turntables, which is then moved up to take the record and relowered after the record has been played. According to the invention, two sets of trays 3, 4 are provided on two posts 1, 2 and the trays of one set are interleaved with the trays of the other set to form a single stack, this enabling more records to be stacked in the same space. This arrangement is of particular advantage in connection with the record take-out device described in Specification 591,448.
Patent GB-614483-A (GB)
Title: Improvements in side cars
IPC: B62K27/04
Filed: 1946-07-15
Abstract: 614,483. Side-car bodies. CLARK, A. T. July 15, 1946, No. 21095. [Class 108 (i)] A side-car for a motor cycle, pedal cycle, or the like, has a pair of identical side frames formed from angle-section members a and b, butt-jointed by metal blocks at points a<SP>1</SP> and a2. The side frames are secured together at front and rear ends by angle-section cross-members g, h, i, k, land m. Inverted U- shaped angle-section frames c and e, which project above the profile of the side frames, are jointed between upper and lower side frame members by means of metal blocks d and f, and above by metal blocks n and o. Metal plating p, secured by rivets, screws or welding, covers the whole framework except for the seat aperture. By fitting additional U-shaped frames provision may be made for extra seats or a stowage compartment beneath the rear coaming. By complete removal of the rear inverted U-frame, the body may be adapted for use in motorcycle combination competitions.
Patent GB-285322-A (GB)
Title: Improvements in logarithmic calculating apparatus
IPC: G06G1/08
Filed: 1927-08-11
Abstract: 285,322. Fiacchi, F. Aug. 11, 1927. Slide-rules of cylindrical form for effecting calculations relating to ferro-concrete structures. A cylinder bea.rs a number of pairs of scales denoting the useful height and the area of slabs or sections, based on different coefficients and read selectively at windows 12 - - 15 slidably adjusted accordingly by a finger-piece 16. The cylinder is rotated to add the logarithms of the various factors by means of graduated rings two of which namely 5, 5<1> are secured.to the cylinder shaft while the other two pairs are only frictionally held to the shaft to allow preliminary relative adjustment.
Patent GB-768457-A (GB)
Title: Improvements in apparatus used in the playing of table or board games
IPC: A63F9/04
Filed: 1954-10-14
Abstract: 768,457. Dice. WEBSTER, S. Oct. 10, 1955 [Oct. 14, 1954], No. 21223/54. Class 132(2). A die has ten square facets A arranged as shown in five diametrically opposite pairs and four convex diamondshaped areas B. The edges may be rounded off. According to the Provisional Specification a die has seven facets five of which are rectangular and make up an equatorial zone and the other two are pentagonal end faces.
Patent GB-829288-A (GB)
Title: Improvements in means for feeding record cards for use in statistical, accountancy and other machines
Inventor: LAST JAMES
IPC: G06K13/103
Filed: 1955-07-22
Abstract: 829,288. Friction clutches. ELLIOTT BROS. (LONDON) Ltd. May 4, 1956 [July 22, 1955], No. 21260/55. Class 80 (2). [Also in Groups II and XVI] In apparatus for feeding record cards (see Group XVI), the feeding means is driven by a clutch-shaft 14 having a clutch thereon comprising clutch discs 18, 19 and a constantlydriven gear-wheel 20 freely mounted on the shaft. The disc 19 is keyed to the shaft but slidable axially, and the disc 18 is mounted on a screw-threaded portion 14a of the shaft. The disc 19 has screw-threaded engagement with the spigot of a flange 22, and is also elastically coupled thereto by a torsion-spring 23. A clutch pawl (not shown), which is operated electromagnetically, engages a step or recess in the flange 22 to arrest and prevent its rotation. In the position of rest, the pawl also engages a similar recess in the disc 19, to. determine the position of the card-feeding components. A check-pawl prevents retrograde rotation of the disc 19. In the position of rest, the spring 23 is in the wound state, and, when the pawl is lifted from the flange 22, partially rotates the flange. The consequent unscrewing of the flange 22 and disc 19, thrusts that disc against the rotating wheel 20 and the latter against the disc 18. The disc 18 tends to rotate slightly relatively to the shaft in view of its screwed connection therewith, and thus produces a selfloading of the clutch on the wheel 20. A stop (not shown) in the shaft 14, limits the angular movement of the disc 18, and an annular torsion spring, between the shaft and disc, serves to withdraw the disc on its screw-thread when the pressure of the wheel 20 is removed, on the ultimate disengagement of the clutch. When the clutch pawl again engages the recess in the flange 22 to arrest it, the energy of the rotating parts causes the disc 19 to wind up the torsion-spring 23 and, by the screwed connection between the disc 19 and flange 22, to withdraw the pressure of the disc 19 from the wheel 20, which can then rotate freely on the shaft 14.
Patent GB-1094674-A (GB)
Title: Solution mining
IPC: E21B43/28
Filed: 1966-05-13
Abstract: 1,094,674. Solution mining. KALIUM CHEMICALS Ltd. May 13, 1966 [May 17, 1965], No. 21271/66. Heading E1F. In the solution mining of mineral from spaced sites in a product mineral stratum solvent and effluent for each site proceed from and to a common surface station through the pair of spaced pipes associated with each of the sites, the pipes being in bores drilled to extend directly from the station to the sites.
Patent GB-276151-A (GB)
Title: Improvements relating to buckles or clasps for belts, bands, straps or the like
IPC: A44B11/24
Filed: 1926-08-30
Abstract: 276,151. Martin, P. A. Aug. 30, 1926. Grips, sliding wedge and roller type.-Clasp fastenings 1 for belts, bands, &c. 6 are provided with one or more hooks 4 carried by a separate plate 3 hinged or otherwise attached to the clasp &c. and projecting towards the outer end of the clasp for engaging lateral slits 8 in the belt &c. The hooks 4 may be punched up from the plate 3. Fig. 7 illustrates the application of the invention to a clasp of the kind in which the free end of the belt is secured by a bar or roller 9 mounted in inclined slots 10 in the flanged sides of the clasp.