baber/WOPTO huggingface dataset:
Patent GB-715876-A (GB)
Title: Process for separating optical antipodes from racemic alpha-amino-beta-hydroxy-aryl-propionic acid esters
Filed: 1952-10-29
Abstract: Optical antipodes are separated from racemic esters of a -amino-b -hydroxy-aryl-propionic acids of the formula <FORM:0715876/IV (b)/1> wherein R1 and R2 are the same or different and represent hydrogen, halogen, lower alkyl or lower alkoxy radicals (the term "lower" used herein implying not more than 8 carbon atoms), Y stands for hydrogen or a nitro group, and R3 is a lower alkyl group, e.g. methyl, ethyl, propyl, iso-butyl or n-butyl, by reacting in solution the racemic ester of the above formula with an optically active dibenzoyl-tartrate, separating the salt of the optical antipodes formed by fractional crystallization, decomposing these addition salts separately in aqueous conditions with an alkali to free the optical antipodes, and then isolating the optically-active forms of such an ester. The starting racemic ester may either be of threo or erythro form and the formation of the addition salts can be effected in either aqueous or alcoholic conditions, but preferably in a lower aliphatic alcohol having not more than 8 carbon atoms in the molecule, e.g. in anhydrous ethyl alcohol.  During fractional crystallization the optically active addition salts are isolated by filtration while the alkali used for the subsequent and separate decomposition of these salts is preferably ammonium hydroxide. Optically-active isomers resulting from such treatment are isolated from the aqueous solution by extraction with an organic solvent, preferably ethyl acetate.  In examples: (1) a racemic ethyl ester of erythro-para-nitrophenylserine is treated with dibenzoyl-(+)-tartaric acid mono-hydrate according to the process described above giving as final products (+) - erythro - and (-) - erythro - paranitrophenylserine ethyl esters; (2) a racemic ethyl ester of threo-para-nitrophenylserine is similarly treated with dibenzoyl-(+)-tartaric acid mono-hydrate giving as final products (-) - threo - and (+) - threo - para - nitrophenylserine ethyl esters.
Patent GB-1347572-A (GB)
Title: Marine structures
IPC: E02B17/00
Filed: 1971-06-11
Abstract: 1347572 Power hammers AIR LOGISTICS CORP 11 June 1971 [15 June 1970] 27405/71 Heading B3H [Also in Divisions B7 and E1] A device for mounting on the supporting legs of an offshore structure (see Division E1) for comminuting an ice floe comprises longitudinally reciprocating mandrels 47 with cutting teeth 48 for impacting on the ice, the mandrels being reciprocated by hydraulic or pneumatic motors 46, and being mounted on a sleeve 41 slidable on the supporting leg 18. The sleeve 41 is movable up and down the leg by rods 43, a pin 45 on the leg engaging a helical groove 44 in the sleeve to rotate the sleeve during its movement.
Patent GB-497813-A (GB)
Title: Improvements in electric discharge lamps adapted for use as sources in optical projection apparatus
IPC: H01J61/86
Filed: 1937-10-08
Abstract: 497,813. Metal-vapour lamps. GENERAL ELECTRIC CO., Ltd., and FRANCIS, V. J. Oct. 8, 1937, Nos. 27410 and 28622. [Class 39 (i)] In a high-brightness high-pressure mercuryvapour lamp, with at least one starting electrode as described in Specification 472,658, the. distance between the running electrodes is so small that the discharge consumes more than 1200 watts /cm. and has a brightness of at least 60,000 candles /cm.<2>, and the distance between a starting electrode and the electrode with which it co-operates is so great that the current during running-up is never more than twice the operating current, the supply circuit remaining unaltered. Preferably, the second distance is more than three times the first. Dimensions and operating conditions are given for three examples having electrode separations of 1-25 and 3 mms.
Patent GB-187221-A (GB)
Title: Anti-ballooning devices for ring spinning or twisting machines
IPC: D01H1/42
Filed: 1922-10-10
Abstract: 187,221. Rouge, J. A. Oct. 10, 1921, [Convention date]. Anti-ballooning arrange. ments.-Wires F, shaped as shown in Figs, 1, 4, or 5, are supported in oval holes O in the ring rail or in holes in a bracket V, Fig. 6, secured to the ring rail, so that they may oscillate under the pressure imparted by the ballooning yarn. The Specification, as open to inspection under Sect. 91 (3) (a), comprises also the arrangement shown in Fig. 2 (Cancelled) and Fig. 3 (Cancelled), wherein the wires are mounted on the cross bar of a bracket, and their movement is limited by stops R', R<2>, and also an arrangement wherein the ring rail is cut away and the wires are pivoted below the edge which forms an abutment determining the operative position of the wire. This subject-matter does not appear in the Specification as accepted.
Patent GB-616633-A (GB)
Title: Improvements in clothes pegs and the like
IPC: D06F55/00
Filed: 1946-09-13
Abstract: 616,633. Spring clips; clothes pegs. JORDAN, H. G. Sept. 13, 1946, No. 27525. [Class 44] A clothes peg, paper-clip, or the like 1 comprises an elongated. body portion 1 having a slot 3 intermediate its ends, a resilient strip 5 having one end bent to engage in the slot 3, and means, such as a length of wire 9, for securing the strip 5 to the body near the slot. The body may be of wood, or of plastic material, of any cross-section, preferably formed with a flat 4 under the strip 5, with the end bevelled at 2. The spring strip 5 is preferably of metal, e.g. spring steel, rust-proofed. The ends of the wire 9 are twisted and soldered to present a smooth end.
Patent GB-1175177-A (GB)
Title: Improvements in or relating to Polarographic Cells.
IPC: G01N27/48
Filed: 1968-06-11
Abstract: 1,175,177. Electro-chemical analysis. HONEYWELL Inc. June 11, 1968 [June 12, 1967], No.27601/68. Heading G1N . A polarographic cell comprises two electrodes 32, 38 immersed in an electrolyte in housing 10, e.g. of PVC, the electrodes being separated by a filler 102 permeable to the electrolyte but not to insoluble particles generated at electrodes 38 during operation of the cell. The cathode 32, e.g. of precious metal, is arranged adjacent a membrane 50 e.g. of fluorinated ethylene propylene permeable to the dissolved gas, e.g. oxygen, to be measured and in whose solution the cell is immersed, and is in communication via passageways 56 with the electrolyte in chamber 12. The anode 38, e.g. of silver, is wound round an insulating mandrel 28 and surrounded by the cylindrical filler 102, e.g. of polyester film supported on a cloth substrate of polyamides, which retains the insoluble silver chloride particles, formed at the anode with an electrolyte of potassium chloride and potassium hydrioxide, in the neighbourhood of the anode. Temperature compensation:- A temperature sensitive resistor 64 is provided in contact with the solution under test in the neighbourhood of the membrane 50 and is connected in series with the electrodes to compensate for temperature variations. Pressure correction:- A closed bladder 76 is provided in the electrolyte chamber 12 in communication via bore 80 with the electrolyte whereby the pressure in the solution under test is communicated to be electrolyte to prevent excessive pressure differential across the membrane 50. Third electrode:- A second cathode 66, e.g. of a precious metal, is wound round an insulating mandrel 58 in contact with the main body of the electrolyte from which it removes any oxygen already in the electrolyte so that it does not interfere in the actual measurement.
Patent GB-759983-A (GB)
Title: Improvements in or relating to palateless dental prosthesis
IPC: A61C13/24
Filed: 1954-09-24
Abstract: 759,983. Artificial teeth. WINNBERG, S. F. Sept. 24, 1954 [Sept. 28, 1953 ; Nov. 23, 1953], No. 27627/54. Class 81(2). A denture having a suction recess in the gum portion provided with a valve has the valve formed from a domed disc, of flexible material, in which there is a narrow slit. The gum depression 3 has a narrow recess 4 extending around almost its full length and, preferably at the midpoint of the denture, this communicates with the interior of the mouth through a valve consisting of a disc 10 clamped in a holder 8 by a threaded annular member 12. The disc 10 is domed at its centre and has a narrow slit 11 at the apex of the dome to form a simple one-way valve. In order to prevent the gum being drawn into the channel 6 and thereby blocking it, it is also proposed to provide a thin metal or other cover plate spaced slightly away from the channel, (see Fig. 3 not shown). The plate may be hinged to the denture to facilitate cleaning. Instead of a single recess 4 a number of interconnected recesses may be provided or there may be a number of separate recesses each provided with an independent valve.
Patent GB-751742-A (GB)
Title: Improvements in weaving looms, particularly dobbies
IPC: D03C1/06
Filed: 1953-10-08
Abstract: 751,742. Double-lift dobbies. STAUBLI, R., STAUBLI, H. H., and STAUBLI, O., [trading as STAUBLI & CO., GEB.]. Oct. 8, 1953 [Jan. 26, 1953], No. 27651/53. Class 142 (2). When the pair of draw knives 12, 13 of a double-lift open-shed dobby are at the inner end of their stroke, a bar 14 operated by a cam 22 presses all the hooks 9 on to the knife 13 ; any hooks that are required to engage the knife 12 are then rocked by levers 28 actuated by the pattern mechanism, which is as disclosed in Specification 751,728. The upper hooks 8 are similarly set by a bar 15 and levers 27. The invention is also applied to a double-lift closedshed dobby to press single-ended hooks on to each of the two alternately-operating knives, those not required to be moved being then lifted off by push needles controlled by the pattern mechanism. Specification 734,249 also is referred to.
Patent GB-1424425-A (GB)
Title: Coated organic polymeric films
IPC: C08J7/052
Filed: 1973-06-11
Abstract: 1424425 Films with lithium silicate coatings E I DU PONT DE NEMOURS & CO 11 June 1973 [12 June 1972] 27679/73 Heading B2E [Also in Division B5] An organic polymeric film has a gas and liquid impermeable coating comprising from 0.1 to 0.6 g/m<SP>2</SP> of lithium silicate in which the mole ratio of SiO 2  to LiO is from 1.6:1 to 4.6:1. The coating may additionally include up to 50% of an adhesion promotion agent such as melamine-formaldehyde resins, urea-formaldehyde resins, polyethyleneimine, glycine or alanine. The films may be made of polyester; polyethylene, polypropylene or copolymers thereof; copolymers of tetrafluoroethylene and hexafluoropropylene; polyacrylonitrile; p.v.c.; polyvinylidene chloride; polyvinyl fluoride, polystyrene; polyamides; or polyimides. Heat set oriented polyethylene terephthalate and oriented linear polypropylene films are preferred. The surface of the film is preferably ionised e.g. by electrical discharge, alkaline etching, or preferably flame treatment. Colloid dispersions of the Li 2 SO 3  may be applied by kiss coating, doctor roll, gravure roll, immersion or spraying optionally using Mayer rods or air doctor knives. Additional topcoats of a heat scalable polymer such as polyethylene, polyvinyl chloride or copolymers of ethylene and vinyl acetate may be applied from disperssion by solvent coating, hot melt extrusion or by hot lamination of a preformed film after the coated film has been primed by coating with silanes, polyurethanes, aqueous solutions of melamine-formaldehyde resins, or aluminium chlorhydroxide.
Patent GB-788935-A (GB)
Title: Device for holding an object against rotation or for facilitating rotation thereof
IPC: B23B31/12
Filed: 1954-09-27
Abstract: 788,935. Opening and closing bottles. CATTERMOLE, H. Sept. 26, 1955 [Sept. 27. 1954], No. 27830/54. Class 125(2). [Also in Groups XXII and XXIII] A device for applying or removing a screw closure to or from a bottle &c. comprises at least three bars 16a, 16b, 16c arranged to form a closed figure and between which the work is held, each bar being guided at one end by a pin 17 silding in an arcuate guide 14a, 14b, 14c in a base 10 and being slidably engaged in a slot 18 in the adjacent bar, and the guides extending outwardly from points a adjacent the centre of the figure formed by the bars, with the outer ends a<SP>1</SP> of the guides offset circumferentially from the inner ends a. An operating plate 11 for the jaws with arcuate slots 15a, 15b, 15c for the pins 17, is preferably provided and located between the base 10 and bars on a pivot 12. Rotation of the plate 11 in an anti-clockwise direction by a handle 21, with rotation of the base prevented by a depending flange, cams the pins 17 inwardly to close the toothed bars on the work, anti-clockwise rotation of the gripped work increasing the grip. The device may be so constructed that work can be introduced from either side depending on the direction of gripping and may be rigidly fixed to a support. Dimensions are given of a preferred construction. The guides 14a ... c may be straight.
Patent GB-1039042-A (GB)
Title: Improvements in or relating to the stacking of sheet material
Inventor: KOSS JOSEF
IPC: B21D43/22
Filed: 1963-07-13
Abstract: 1,039,042. Sheet delivering. WILLIAM CROSLAND Ltd. Oct. 2, 1964 [July 13, 19631, No. 27843/63. Heading B6H. A sheet stacking mechanism comprises a pair of guides 6, 7, Fig. 1, located on opposite sides of a stack of sheets S, guide 6 being fixed and guide 7 movable to accommodate various sizes of sheets. A plate 8 of transparent material is located above the guides and is provided with apertures 9 which may be obturated by disc members 10 to regulate the size of the apertures 9. In operation a sheet is delivered from a machine by a gripper bar 1 having lugs 2 provided with impaling spikes 3 whereby when the sheet is delivered above the stack S and below said apertured plate 8 a reciprocating stripper 4 provided with lugs 5 strips the sheet from the spikes which commences the fall on to the top of the stack. The apertured plate creates an air pressure differential between the upper and lower faces of the sheet allowing the sheet to drop in a substantially vertical direction. The sheets delivered by the gripper bar 1 may be further guided by stack location members 11, Fig. 4, disposed along the two remaining opposite sides and the members may be fixed or movable.
Patent GB-179136-A (GB)
Title: Improvements in corsets
IPC: A41C1/00
Filed: 1921-10-20
Abstract: 179,136. Jouandou Hau-de-Bayle, L., and Brossard, M. April 26, 1921, [Convention date]. Corsets are arranged to facilitate being washed by having the usual stiffeners contained in sheaths C with openings D for removal and by having detachable suspenders H and aluminium or like lacing eyelets. The openings D are arranged on the waist line. The busks preferably consists of springs without hooks or clasps and arranged close to the fastenings, which comprise buttons attached to small cords or laces and engaging slits f formed between rectangular pieces G sewn to one side of the front of the corset. Certain of the sheaths are double for two stiffeners separated by stitching and a stiffener is arranged at each side of the lacing eyelets. Reference has been directed by the Comptroller to Specifications 15543/92, 14375/09, 17959/09, and 8111/15.
Patent GB-221686-A (GB)
Title: Improvements in or relating to hose and the method of and means for producing the same
IPC: D04B1/26
Filed: 1923-11-06
Abstract: 221,686. Markham, C. E. Nov. 6,1923. Stockings and socks.-A plain, knitted, seamless stocking is provided with a mock rib welt 1, which may be inturned and is capable of greater expansion than plain fabric, the mock rib wales 2 consisting of sinker wales of increased width.
Patent GB-1065388-A (GB)
Title: Process for continuous pickling of steel strip and regeneration of the contact acid
IPC: C01G49/06
Filed: 1964-07-07
Abstract: In a continuous process of pickling maning ferrous strip and regenerating pickle liquor, the strip is treated, preferably by spraying, with a liquor maintained at 5% - 18% by weight HCl at 140 DEG  - 200 DEG F., a known volume of spent liquor being continuously withdrawn and sprayed into an evaporator where ferric chloride is converted to ferric oxide and the vapourized HCl is condensed and collected in water to produce a 20% acid solution which is returned to the pickling process. According to the Figure (not shown) the strip passes through the pickling tower (1) via rollers and is sprayed with acid from sprays (15a), (16a), (17a) supplied from tank (7).  Excess pickling liquor is removed from the strip by air jets (18) and squeegee rolls (19) and the strip then passes into water tank (8).  The used liquor is pumped from tank (7) into a roaster (24) and the ferric oxide is deposited into container (27).  The HCl vapour pass via cyclone (29) to absorber (31) supplied with cooling water from (32).  The HCl solution formed is passed to a storage tank which supplies tank (7).
Patent GB-1470457-A (GB)
Title: Signal circuits
IPC: G10H3/12
Filed: 1974-06-24
Abstract: 1470457 Electrophonic musical instruments; frequency multiplication and division MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 24 June 1974 [23 June 1973 17 Dec 1973] 28002/74 Headings G5J and G5D [Also in Division H3] A music-producing system receives input audio-frequency signals, detects the fundamental frequency thereof, memorizes the fundamental frequency and produces output tones related to the memorized fundamental frequency. Signals corresponding to vocal or instrumental music are applied to a frequency detector 11 comprising a low pass filter, limiting amplifier and Schmitt trigger, to produce a fundamental frequency f to control frequency generator 12. In one embodiment frequency generator 12 comprises a phase locked loop (see Division H3) including a voltage controlled oscillator which continues to oscillate at the detected fundamental frequency after the input signal is removed and until a new input signal arrives. In an alternative digital circuit, the output of frequency generator 12 which may be at the fundamental frequency or a multiple or submultiple thereof is fed via an envelope controller 13, tone filter 16, amplitude or frequency modulator 17 and volume controller 18 to an output system 19, 20. The system also includes an envelope detector 14 comprising a rectifying and smoothing circuit and a tone quality detector comprising a plurality of filters which make a rough assessment of the tone quality. The envelope controller 13 is controlled either by the input envelope detected by 14 or another envelope such as legato or percussion produced by an envelope converter, which can be dependent upon the detected fundamental frequency and tone quality. The tone filter and modulator may be controlled in dependence upon the fundamental frequency and tone quality and the envelope being used or by external controls 22, 23. The volume control 18 may be controlled by circuit 23 which averages the input amplitude or by an expression pedal 24. Digital frequency multiplication and division.- The input frequency f is applied through a gate 62 to the toggle of flip-flop 64. During the first cycle of the signal the output # gates clock pulses at a frequency Fc to a first counter 49. During the second cycle output # gates clock pulses at frequency nFc to a second counter 53 and at the same time clock detector 65 prevents further input cycles reaching flip-flop 64. Counter 53 continues to count and every time the count equals that in counter 49 comparator 155 produces a pulse which resets counter 53. These pulses continue to be produced at a frequency nf until detector 58 detects a change from noinput to input condition or a frequency change of more than a predetermined amount and resets flip-flop 64 enabling a new count to be stored in counter 49.
Patent GB-363637-A (GB)
Title: Process and improvement in the manufacture and casting of cement products
IPC: B28B7/00
Filed: 1930-09-19
Abstract: 363,637. Moulds for cement products. GARTNER, W., 2, Home Glen, Wellesley Road, Twickenham, Middlesex. Sept. 19, 1930, No. 28009. [Class 87 (ii).] Imitation tiled or brick objects moulded from an aggregate with surface grooves to imitate the jointing marks between tiles &c. have these marks produced by ribs fixed to a mould or detachable as a unit therefrom. The mould 1 is provided with a face-plate 2 carrying the ribs 3 or the ribs may form a separate grid, Fig. 3, which is attached to the mould by dowel pins 4. The aggregate may be homogeneous, or a first layer of coloured cement and crushed vitreous material may be screeded off at the rib level and a less expensive cementitious material added as a backing. The jointing marks may be painted or grouted to enhance the divided effect.
Patent GB-741701-A (GB)
Title: Improvements in tubulous boilers and in the operation of unit power plants
IPC: F22B35/14
Filed: 1953-10-13
Abstract: 741,701. Forced flow and composite steam boilers; steam raising in boilers. DURRWERKE AKT.-GES. Oct. 13, 1953 [Oct. 13, 1952], No. 28159/53. Class 123(2). A boiler of a unit power plant comprising a turbine 9 has a main steam generating section of the forced flow or natural circulation type and a separately operable forced flow section of a size suited to the minimum load or starting-up requirements of the turbine. In Fig. 1, the main boiler section is of the forced flow, once through type, a pump 1 feeding water through valves 17, 2 for flow through an economiser section 3, a radiant steam generating section 4, a transition section 5 and radiant and convection superheaters 6, 7, superheated steam passing to turbine 9 through valve 8. The minimum load section of the boiler consists of corresponding heating surfaces 3a ... 7a to which water can be fed through valve 13 and from which steam passes to the turbine through valve 14, a separate furnace 16 being provided to heat superheater sections 6a, 7a. During starting, the main section is filled with water, valve 8 being closed and valve 11 in a line 10 opened. Water is pumped through sections 3a ...7a and discharges through a valve 15, valve 14 being closed. Furnace 16 is started and, when steam at the required pressure is generated, valve 15 closed and valve 14 opened to admit the steam to the turbine. When the latter has heated sufficiently the main section is fired and connected with the turbine, furnace 16 then being stopped. If the turbine load decreases to 5 per cent of the maximum, its steam demand is met economically by shutting down the main furnace, restarting furnace 16 and adjusting the valves so that the turbine receives only the steam flow from section 3a ...7a. Fig. 5 shows the invention applied to a natural circulation boiler comprising a steam and water drum 20 to which water is fed through economizer 3 and from which steam flows through superheaters 6, 7. As before, a parallel flow path through sections 3a, 6a, 7a is provided constituting the minimum load, forced flow section of the boiler.
Patent GB-353318-A (GB)
Title: Improvements in and relating to the manufacture and production of ethylidene diacetate
Filed: 1930-09-20
Abstract: Ethylidene diacetate is separated from the reaction product obtained by treating acetic acid with acetylene in presence of a catalyst, by agitating with an aqueous solution of a salt of higher density than ethylidene diacetate and allowing the mixture to separate into two layers, the aqueous layer being rejected. Suitable salts are sodium acetate and sodium sulphate.  The separated ethylidene diacetate may be dried by treatment with anhydrous sodium or potassium acetate.
Patent GB-250992-A (GB)
Title: Improved textile fabric and method of manufacturing the same
IPC: D03D23/00
Filed: 1924-11-25
Abstract: 250,992. Dehove, M. Nov. 25, 1924. Stitches and seams. -A fabric is woven with patches A containing warp and weft threads, patches B containing warp threads only, patches C containing weft threads only, and spaces D containing no threads. The spaces of the fabric may be filled up by means of embroidery threads passed through alternate spaces or diagonally or alternatively or in addition thereto an ornamentation mav be applied by means of a rib stitch or by burls or knots or over-edge scolloping stitches.