baber/WOPTO huggingface dataset:
Patent GB-1055855-A (GB)
Title: Improvements in and relating to electric converters
IPC: H02M7/515
Filed: 1965-05-24
Abstract: 1,055,855. Converting. SOCIETE GENERALE DE CONSTRUCTIONS ELECTRIQUES ET MECANIQUES (ALSTHOM). May 24, 1965 [May 22, 1964], No. 21894/65. Heading H2F. A polyphase bridge inverter of controlled rectifiers 1 ... 6, incorporates shut-off circuitry comprising a series combination of capacitor 20, inductor 21 and auxiliary back-to-back controlled rectifiers (24 ... 29) for each phase. In the embodiment of Fig. 1 each main rectifier fires for 120 degrees and a separate D.C. supply 34, 35, is provided for charging the capacitor 20. At commutation from rectifier 1 to rectifier 2, the rectifiers 2, 22 and 26 are fired and the capacitor (charged as shown) discharges along the dotted path shutting off rectifier 1. The capacitor becomes reversely charged due to the resonant L.C. circuit 20, 21, and the lost voltage due to dissipated energy is made up from the source 34, 35, by firing rectifiers 30 and 33. The capacitor 20 is now correctly charged to shut off the thyristor 6 at the next commutation when thyristors 4, 23 and 27 are fired. Reverse diodes 14. . . 19 are provided to pass excess shut-off current. In a different embodiment (Fig. 4, not shown) the separate charging circuit (30 ... 35) is dispensed with and chokes are included in the bridge arms. In this embodiment, conduction is for 180 degrees, so that when the auxiliary rectifiers are fired to switch off rectifier 1, its associated rectifier 4 is also fired. This completes a circuit 22, 20, 21 and 4 for reversely changing the capacitor from the main D.C. supply. The chokes aid commutation by providing additional blocking voltage on the shutting off rectifier, and limit short-circuit current through the series connection of rectifiers 1 and 4 occurring at commutation.
Patent GB-262179-A (GB)
Title: Improvements relating to a process for the production of rubber
IPC: C08C1/15
Filed: 1925-09-02
Abstract: 262,179. Beckmann, H. Sept. 2, 1925. Addition to 240,430. Latex, coagulating. - Indiarubber having microscopically small pores is obtained by coagulating latex to a homogeneous cohesive jelly and vulcanizing this without allowing it to become dry. The coagulation is effected either by treating the latex with a gaseous acid, such as sulphurous acid, or by converting it into a thick, paint-like pulp by the admixture of alum, zinc sulphate, ferric chloride, or the like and eubsequently coagulating with a liquid or gaseous acid.
Patent GB-1469855-A (GB)
Title: Process for the production of a kanamycin derivative
IPC: C07C271/22
Filed: 1974-05-17
Abstract: 1469855 1 - [L - (-) - γ - Amino - α - hydroxybutyryl]-kanamycin A BRISTOL-MYERS CO 17 May 1974 22026/74 Heading C2C 1 - [L - (-) - γ - Amino - α - hydroxybutyryl]- kanamycin A is prepared by (a) acylating kanamycin A (1 mole) with N-benzyloxycarbonyloxy-succinimide (up to 1 mole) in a solvent at below 50‹ C., treating the resulting 6<SP>1</SP>-benzyloxycarbonyl-kanamycin A (1 mole) with 4-nitrobenzaldehyde, benzaldehyde, 4-methoxybenzaldehyde or pivaldehyde (at least 3 moles) in a C 1-6  alkanol at an elevated temperature for at least 2 hours and treating the resulting imine of the general formula wherein Z is a group having one of the formulµ (1 mole) with L-(-)-γ-benzyloxycarbonylamino- α - hydroxybutyric acid N - hydroxysuccinimide ester (at least 1 mole) in an organic solvent at 0-50‹ C., removing the solvent and hydrogenating the residue in a water-water-miscible solvent system. It may be converted to acid addition salts thereof. L - (-) - γ - Benzyloxycarbonylamino - α- hydroxybutyric acid N - hydroxysuccinimide ester is prepared by reacting L-(-)-γ-amino-α- hydroxybutyric acid with benzyloxycarbonyl chloride and reacting the resulting L-(-)-γ- benzyloxycarbonylamino - α - hydroxybutyric acid with N-hydroxysuccinimide. N - Benzyloxycarbonyloxy - succinimide is prepared by reacting N-hydroxy-succinimide with benzyloxycarbonyl chloride. L - (-) - γ - Amino - α - hydroxybutyric acid is prepared (a) by refluxing Ambutyrosin A with aqueous NaOH or (b) by reacting 2-hydroxy-4- phthalimidobutyric acid with dehydroabietylamine and hydrolysing the resulting dehydroabietylammonium L - α - hydroxy - γ - phthalimidobutyrate.
Patent GB-353250-A (GB)
IPC: B65G47/14
Filed: 1930-07-23
Abstract: 353,250. Feeding filaments singly from a pile. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London.- (Assignees of Patent-Treuhand-Ges. f³r Elektrische Gl³hlampen; 11, Ehrenbergstrasse, Berlin.) July 23, 1930, No. 22228. Convention date, Aug. 2, 1929. [Class 142 (ii).] Filaments for electric lamps are taken singly from a pile on an inclined tray and delivered to apparatus for securing them in place by means of a gripper consisting of a pair of jaws adapted to descend into the pile, seize a filament in a pocket-like recess in the jaws, and carry it to a shoot whence it passes to the further apparatus. The grippers consist of a fixed jaw 6 and a pivoted jaw 7 mounted in a slide 5 moving vertically in a traversing carriage 27. The jaws 6, 7 can be held apart against the action of a spring 9, Fig. 6, by means of a spring latch 13, Fig. 8. The jaws are caused to descend into the pile of filaments in the tray 2 by a spring 28 and the latch 13 is then released by a camactuated push-rod 16, allowing the jaws to close and seize a filament in a pocket formed by recesses 10 in their tips. The slide 5 is then raised by a cam 19 and the carriage 27 traversed by a cam-actuated slotted lever 29, a roller 22 at the lower end of the slide 5 running on a way 36. When the grippers are above a shoot 46 a block 11 on the jaw 7 strikes against an abutment 15 and opens the jaws, which are then held by the latch 13, releasing the filament. The carriage 27 is then returned and the cycle repeated. The shoot 46 delivers the filament to a groove 50 which is then covered in by a slide 51 to form a compressed air or suction conduit by which the filament is delivered to further apparatus. The tray 2 may be jolted or the jaws vibrated while therein to assist them in gripping a filament. In a modification, the movable jaw slides instead of rotating and the jaws may be formed with several pockets. Specification 291,612, [Class 142 (ii), Looms, Kinds &c.], is referred to.
Patent GB-149618-A (GB)
Title: Improvements in electrical-discharge-gap apparatus
IPC: H01T4/14
Filed: 1920-07-26
Abstract: 149,618. Metropolitan-Vickers Electrical Co., (Assignees of Allcutt, C. T.). Aug. 15, 1919, [Convention date]. Addition to 123,064. Protective arrangements. - In electric discharge-gaps of the kind described in the parent Specification, the impedance connecting the auxiliary electrode and one of the main electrodes is shunted by an auxiliary gap. The impedance 12, 13, Fig. 1, is shunted by an auxiliary gap 14 surrounded by a protective shield 18. In a modification, the shunted impedance consists of a non-inductive resistance and a capacity. In another modification the gap 14 is connected in series with a non-inductive resistance; and in a further modification the gap is connected in series with an inductive resistance. In the constructional form shown in Fig. 5, the electrode 7, provided with a discharge terminal 27, is mounted upon a corrugated insulating-pillar 23 mounted upon a pillar insulator 24 comprising a series of conducting-members 25 separated by insulating- members 26 providing a series of small condensers a portion of which is connected in series with a resistance 34 across the electrode 7 and the auxiliary electrode 11. An insulator 28 mounted upon a conductor 29 and carrying a conductor 30 forms a condenser between the electrode 33 and the auxiliary electrode 11. The conductor 30 is provided with a discharge terminal 31 and is connected to the electrode 33 by a resistance 35. The auxiliary gap 14 comprises electrodes 16, 17 mounted within a conducting-shield 18<a>, and the electrode 17 is supported upon an inductance 22.
Patent GB-966637-A (GB)
Title: Improvements in or relating to seats
Inventor: LIPYEAT DENIS ALEXANDER
IPC: A62B35/00
Filed: 1962-06-08
Abstract: 966,637. Safety harnesses. G.Q. PARACHUTE CO. Ltd. June 10, 1963 [June 8, 1962], No. 22267/62. Heading A3V. A rescue harness or the like comprises a cloth, webbing, wood or glass fibre seat 10, adjustable leg straps 14, adjustable shoulder straps 15 and suspension ropes 26 attached to the straps at 20, 23 which may pass over a pulley 34 (Fig. 3, not shown) and fall to within reach of the occupant who may raise or lower himself at will thereby. Each rope 26 may be divided to join the points 20, 23 separately or alternatively stops may be provided on each rope 26 to limit movement of the rings 28.
Patent GB-908793-A (GB)
Title: Improvements in or relating to electric heaters
Inventor: BOWTELL JAMES NORMAN
IPC: H05B3/00
Filed: 1958-07-11
Abstract: 908,793. Electric heaters. GENERAL ELECTRIC CO. Ltd. July 13, 1959 [July 11, 1958], No. 22304/58. Class 39 (3). An electric heater, e.g. for use as a boiling- plate or space or process heater, comprises a quartz tube heating element or lamp in combination with a screen of refractory material for radiating the heat to be used, the screen reducing glare and protecting the lamp from damage. The lamp may be of circular cross-section and completely enclosed by a metal tube of circular or square cross-section. A group of lamps 7, each including an electric filament 6, mounted side by side may have individual tubular screens 9 or may be enclosed by a tube of flattened cross-section, the opposing walls being compacted to engage each lamp over an area of contact, or the tube may be made up of separate members, or two metal screens may be used one on each side of the lamps. One screen may act as or be replaced by a reflector.
Patent GB-934904-A (GB)
Title: Improvements in or relating to pentose solutions
IPC: C13K13/00
Filed: 1961-06-21
Abstract: Concentrated pentose solutions of high purity are obtained by treating material of vegetable origin containing hemi-celluloses, after a pretreatment to release natural organic acidity and having a natural acidity of approximately 4% in weight of dried material calculated as acetic acid, for 1-3 hours in a closed vessel with water under pressure at a temperature of 140-170 DEG C. The ratio of weight of water to anhydrous material may be in the range 1 : 3 to 1 : 5.  Suitable starting materials are the wood of oak or sweet chestnut after treatment to extract tanning agents and bagasse left after the extraction of sugar from sugar cane. Specifications 922,684 and 922,685 are referred to.
Patent GB-423877-A (GB)
Title: Improvements in or relating to the production of ethyl alcohol from ethylene
IPC: C07C29/04
Filed: 1933-08-11
Abstract: Alcohols are produced by hydrating olefines and olefines are produced by dehydrating alcohols by the action of catalysts comprising cadmium metaphosphate together with a small proportion of one or more of the metaphosphates of barium, strontium, titanium, chromium and tellurium.  The metaphosphates are produced by evaporating to dryness a mixture of the oxides or carbonates and orthophosphoric acid and finally heating to 300 DEG  C.  The reaction may be effected in liquid or vapour phase at ordinary or increased pressure, and at 100--300 DEG  C.  In examples: (1) alcohol vapour is passed over cadmium metaphosphate containing 1 per cent of barium metaphosphate at 300 DEG  C., with 0,06 minutes contact; (2) ethylene and steam are passed over the same catalyst at 290 DEG  C. and 100 atmospheres pressure, the partial pressure of the steam being 30 atmospheres.ALSO:Catalytic agents, preparation of.--Catalysts for the hydration of olefines or the dehydration of alcohols comprise cadmium metaphosphate containing a small proportion such as 1 per cent of one or more of the metaphosphates of barium, strontium, titanium, chromium, and tellurium.  The metaphosphates are made by evaporating to dryness a mixture of the oxides or carbonates with orthophosphoric acid and finally heating to 300 DEG  C.
Patent GB-1018867-A (GB)
Title: Coherent light generator
IPC: H01S3/30
Filed: 1963-06-06
Abstract: 1,018,867. Lasers. HUGHES AIRCRAFT CO. June 6, 1963 [Oct. 4, 1962], No. 22561/63. Heading H3B. In a coherent light generator a laser material exhibiting Raman effect is excited by monochromatic light from a first laser such that the material is excited to a non-stationary energy state whereby stimulated emission due to trasitions from this state to a stationary state produces coherent light energy shifted in frequency from the frequency of the excitation light by an amount determined by the Raman effect. In one embodiment of the generator, Fig. 4 (not shown), monochromatic light from a ruby laser 15 is passed via a polarizing prism 17 through a Kerr cell 19 containing a Raman laser active material such as nitrobenzene or other organic substance. The cell and polarizer form an optical shutter 21 which together with the laser 15 are included within an optical resonator defined by dielectric flats 23, 25. The light energy optically pumps the Raman active material to a non-stationary energy level E 1 , Fig. 2, which is not equal to any stationary energy levels of the material, and from the non-stationary state E 1  a transition takes place to a Raman active stationary energy level E 2 , which transition produces a different or reduced energy radiation of wave number = = (E 1  - E 2 )/#c. In order to isolate the wanted stimulated radiation from the characteristic emission of the ruby laser an interference filter may be used at the output. In the embodiment of Fig. 5 (not shown) the Raman active material is placed in a cell separate from the optical shutter. The use of more than one frequency converter cell for the purpose of producing one or more shifted frequency stimulated emission light energy outputs is shown in Fig. 6. Monochromatic light energy from a source 1, e.g. a ruby laser, is directed at a first optical resonator 6a between reflectors 27, 28 and at a second optical resonator 6b between reflectors 28, 29, Raman active materials being placed in the cells 5b, 5c of the resonators. By choosing the proper reflectivities of the reflectors 27, 28, 29 one or more stimulated emissions 13a, 13b may occur, the output of the generator including light energy of the source 1, light energy shifted in frequency from source 1 by an amount determined by frequency converter cell 5b, and light energy shifted in frequency by an amount determined by frequency converter cell 5c. In Fig. 7 (not shown) a ruby laser, optical shutter and a first frequency converter are disposed in a first optical resonator and a second frequency converter is disposed in a second optical resonator.
Patent GB-459672-A (GB)
Title: Improvements in flyers for spinning frames for flax, hemp, jute and similar fibres
IPC: D01H7/48
Filed: 1935-08-12
Abstract: The part of the eye of spinning-flyers for flax and similar fibres which is most subject to wear is formed of "hard metal," that is, a sintered or cast alloy of one or more highly refractory carbides, silicides, nitrides, and borides with or without a metal of lower melting point such as an iron group metal, the best known being about 93 per cent of tungsten carbide and about 7 per cent of cobalt.
Patent GB-262848-A (GB)
Title: Improvements in or relating to roads and ways
IPC: E01F9/06
Filed: 1925-09-11
Abstract: 262,848. Allfree, B. R., and Moore, P. J. Sept. 11, 1925. Surface markings or signs for traffic guidance are formed of a number of small wear-resisting studs of china clay, aluminium, or similar material of contrasting colour embedded in paving- blocks or other paving material. Studs of china clay B, Fig. 2, surrounded by a protective sheath of metal (not shown) may be embedded in wood blocks A to mark lines or letters on the road, or the studs may be inserted in holes in a metal sole-plate C, Fig. 4, which serves to key them in an asphalt or like continuous road surface. The studs are of any desired shape in cross-section. Reference has been directed by the Comptroller to Specifications 695/76, [Class 20, Buildings &c.]; 1952/89; 1628/93, [Class 20, Buildings &c.]; 14170/96; 5917/03; 27364/11, and 12742/14, [both in Class 20 (iv), Floors &c.]; and 208,316, [Class 87 (i), Bricks &c.].
Patent GB-192109-A (GB)
Title: Improvements in or relating to hydraulic power transmission means
IPC: F16H39/18
Filed: 1921-08-29
Abstract: 192,109. Brougham, F. J., (Oilgear Co.). Aug. 29, 1921. Clutches and speed-varying mechanism; liquid-pressure engines. - In apparatus for the hydraulic transmission of power. pump cylinders rotate on a pintle C5, Fig. 2, integral with a transversely-adjustable block C7 and motor cylinders on a pintle C5<1> integral with a fixed transverse rail. C8. The arrangement of the pintles may be reversed. The block C7 is supported and guided by the rail C8 through members C14, C15 flexibly mounted on the block C7. The pump and motor shafts carry cup-shaped discs D3, B3<1> having roller tracks B4, B4<1> secured to flats machined on their internal peripheries. The stems B6<2>, Fig. 3, of T-shaped cross-heads are secured in hollows formed in the pump and motor plungers in such a manner as to permit a slight lateral deflection of the crossheads with respect to the plungers. Cages carrying rollers B9, B9<1> interposed between the crossheads and roller tracks B4, B4<1> are provided with gears such as B13<1>, Fig. 4, meshing with teeth in the roller tracks and cross-heads. Ports in the inner ends of the pump and motor cylinders cooperate with ports in the pump and motor pintles, the necessary communication between the pump and motor ports being maintained in all positions of the sliding block C7 by means of elongated abutting ports C6, C9 in the block C7 and C6<1>, C9<1> in the fixed rail C8. The pressure of the members C14, C15 on the rail is opposed by a lesser hydraulic pressure, these members having recesses C16, C17 connected to the ports C6<1>, C9<1>. The blocks C7, C8 are provided with leakage-collecting conduits H10, H11, H10<1>, H11<1> connected to leakage-colleeting grooves H2 in the members C14, C15 and to leakage-collecting grooves such as H5<1>, H7<1> in the cylinder blocks, the latter grooves being connected to grooves H8<1> at the outer ends of the cylinders, and the leakage is returned.to the port C6<1> or C9<1> through a suction valve. Leakage collecting in catch basins at the bottom of the casing is returned to the circuit through other suction valves and nozzles H5, H6 which are disposed in the ports in such a manner that the circulating liquid exercises an injector action on them to aid in the leakage return.
Patent GB-803214-A (GB)
Title: Device for laterally displacing crop such as hay, grass and the like material lying on the ground
IPC: A01D78/00
Filed: 1955-01-28
Abstract: 803,214. Side-delivery rakes. VAN DER LELY, N.V., C. Jan. 28, 1955 [Jan. 29, 1954], No. 22905/56. Divided out of 802,782. Class 6(3). A hay rake comprises wheels 20 each provided with bearings 21 for rods 22 which are guided by a ring 28. Each rod is formed with a closed loop 23 which is situated above the rim of the wheel and the loops of all the rods are joined by a helical spring 30. As the wheel is rotated by contact of the rods with the ground each rod contacts the ground and is then elevated clear of the ground, the spring 30 limiting the movement of each rod through the bearing 21.
Patent GB-952551-A (GB)
Title: Process for the production of metallic manganese by electrolytic separation
IPC: C25C1/10
Filed: 1962-06-15
Abstract: Manganese metal is prepared by electrolysis of an acid solution of manganous sulphate using mercury cathode, in which 20-200 g. of ammonium sulphate per litre is added to the electrolyte containing 15 g. per litre or more of MnSO4, and the temperature is maintained at 75  DEG C. or higher.  The formation of manganese dioxide is avoided by using an anode of a lead/ tin alloy containing a little cobalt. The acid manganous sulphate electrolyte may be an acid treated manganese ore, in which the acidity is reduced to 10-15 g. per litre. A compound Mn2Hg5 is formed with the mercury which is insoluble in it, and is decomposed above 75  DEG C. to form MnHg which is also insoluble in mercury. The content of Mn in mercury is about 1% and flows readily at the operating temperature. Specification 597,220 is referred to.
Patent GB-321242-A (GB)
Title: Improvements in and appertaining to driving gear for lathes
IPC: B23Q5/14
Filed: 1928-08-10
Abstract: 321,242. Smith, A. Aug. 10, 1928 Turning. - The headstock driving-gear of a lathe is so arranged that all the gear carrying shafts are at a lower level than the spindle, some of the shafts being mounted in a separate casing which serves also as an oil reservoir. Guarding and lubricating is thus facilitated and vibration is reduced. A pulley or motor shaft 6<a> is geared to a shaft 4 carrying a cluster gear 9, 9<a> driving a shaft 3 transmitting to a cluster gear 12, 12<a>, 12<b> on a shaft 2 driving the spindle through clutch gears 14, 14a controlled as described in Specification 269,964. The shafts 3 and 4 are mounted in a well-like casing 24 let into the bed A and serving as a guard and an oilbath. The spindle gears are enclosed by a two-part guard B. A two-speed drive for the feed motion is provided at 25, 25<a>. The cluster gear 12 is controlled by a fork spanning the wheels 12, 12<a> and operated by rack and pinion 18 from a handle 16. A handle 35 on a. vertical shaft 34 similarly controls the clutch gear 9.
Patent GB-351791-A (GB)
Title: Improvements in or relating to measuring machines for tiles and similar earthenware articles
IPC: B07C5/04
Filed: 1930-07-31
Abstract: 351,791. Gauging dimensions of tiles &c. HALL, H. H., 18, Withies Road, Trent Vale, and BOULTON, Ltd., W., Navigation Road, Burslem, both in Stokeon-Trent. July 31, 1930, No. 23070. [Class 106 (ii).] Relates to measuring machines for tiles &c. as described in Specifications 23432/13 and 292,428, [both in Class 106 (ii), Dynamometers &c.], in which the tiles are intermittently fed to and from measuring devices and a mark is printed on the tile corresponding to the measurement, and comprises the provision of a stationary support for the tile during printing and in the provision of two inking rollers to keep the printing type adequately inked. The tiles &c. T are traversed through the machine as usual by a conveyer containing two endless chains b connected by cross slats c, and two endless belts d. At the printing stage, the tiles pass on to a rigid support P composed of a bracket p<2> secured to the machine frame a and having secured thereto bars p<3> inclined at the ends to allow the tiles to pass readily on and off and faced with vulcanite to prevent scratching. A type-wheel is carried by a movable arm which has pivoted to it on the same pivot two separate arms each carrying an inking roller.
Patent GB-1419616-A (GB)
Title: Blade seat for an adjustable doctor blade mounting
IPC: D21G3/00
Filed: 1971-11-10
Abstract: 1419616 Doctors JAMES ROSS Ltd 10 Nov 1972 [10 Nov 1971] 23078/75 Divided out of 1419614 Heading D2A The subject matter of this Specification is identical with that described in Specification 1419614 but the claims are concerned with the blade seat of the doctor blade holder.
Patent GB-748092-A (GB)
Title: Improvements in wire-coil winding devices
Inventor: SAPUNARU ALEXANDER
IPC: B21F3/04
Filed: 1953-08-21
Abstract: 748, 092. Coiling. SUSS, O. Aug. 21, 1953, No. 23143/53. Class 83 (4). A coil spring winding device comprises a helically grooved fixed mandrel 1 surrounded by a coaxial sleeve 6, serving to confine wire 3 being coiled in the mandrel groove, and rotated in the direction of coiling by gears 7, 8, thus reducing frictional resistance to the passage of the wire. The speed of rotation of the sleeve may exceed that of the wire. The mandrel and sleeve may taper conically towards the outlet end. Two coil springs may be wound into one another to form a double coil spring, thus coils 13, 14 from outlet tubes 11, 12 of winding devices may be brought together in a forked guide 17 to form a double coil spring 18.