baber/WOPTO huggingface dataset:
Patent GB-992816-A (GB)
Title: Improvements in or relating to preparation of starch amines
IPC: C08B31/12
Filed: 1962-11-29
Abstract: A primary aminoalkyl starch ether is made by reducing a cyanoalkyl starch ether.  The starch base may be any naturally occurring starch, or thin-boiling starch, dextron, or starch derivatives, e.g. ethers, provided that sufficient hydroxyl groups remain to allow conversion, by known methods, to cyanoalkyl derivatives containing at least 0.1% by weight of nitrogen. Agents for the reduction of the cyanoalkyl starch ether include stannous chloride, sodium borohydride, hydrazine hydrate, 1,3-dihydroxypropanone, lithium aluminium hydride, sodium hydrosulphite and nascent hydrogen.  The reaction medium may be aqueous, non-aqueous or a solution of water with a water-miscible organic solvent.  The initial starch or cyanoalkyl starch ether may be in granular or in pregelatinized form.  Examples describe the preparation of aminoethyl and aminopropyl starch ethers.  The products are electropositive and have improved dispersibility and stability.
Patent GB-1280463-A (GB)
Title: Anti-convection head for a glass-fibre drawing furnace
Inventor: CLARK GEORGE ARCHER
IPC: C03B37/029
Filed: 1968-09-24
Abstract: 1280463 Drawing glass fibres POST OFFICE 2 July 1969 [24 Sept 1968] 45298/68 Heading C1M [Also in Division F4] In a vertically mounted glass fibre drawing furnace 3 the formation of convection currents, due to the escape of hot gases from the top of the furnace at the entry point of a glass rod 8, is eliminated by the provision of a cylindrical head 1 which surrounds the rod 8 and is supplied with a control gas through a horizontal inlet tube 9. The flow of control gas which is downwards, counterbalances the upward flow of hot gases. The flow rate of the gas is adjusted in dependence of the temperature indicated by a thermocouple located in the hot zone of the furnace, the thermocouple giving a maximum reading when the condition of balance is achieved. The type of gas fed to the head is chosen to provide a suitable atmosphere in the hot zone of the furnace. The head is positioned to cover the exit 5 of the central furnace tube 4. The diameter of the glass rod 8 is slightly less than that of the aperture 6 and surrounding sleeve 7 thereby providing a high resistance to gas flow from the interior of the head 1 to the external atmosphere.
Patent GB-1192660-A (GB)
Title: Stilbene Derivatives
IPC: C07C263/10
Filed: 1968-09-25
Abstract: 1,192,660. Stilbene derivatives. UPJOHN CO. 25 Sept., 1968 [17 Oct., 1967], No. 45523/68. Heading C2C. [Also in Divisions C3 and D1] The invention comprises stilbene derivatives of either of the formulµ in which R denotes an alkoxy group of 1-6 carbon atoms, X is 1-3, m is 1 or 2 and n is 0 or 1, the sum of m and n not exceeding 2. The invention extends to the cis and trans forms of the compounds, or mixtures thereof, but does not include 4.methoxy-4<SP>1</SP>-aminostilbene. The amines formulated above are prepared by reducing the corresponding nitro compounds with reducing agents which do not affect the ethylenic bond, some of which are specified. The isocyanates are obtained by phosgenating the amines. Examples are given. The products are useful in the manufacture of photoresist resins and light-sensitive polymers. The monoamines and monoisocyanates are useful also as optical brightening agents (see Divisions C3, D1 and G2). The nitro compounds used as starting materials are obtainable by condensing an aldehyde of the formula with a nitrotoluene of the formula or with a nitrophenylacetic acid of the formula In the second of these processes a cinnamic acid derivative of the formula is intermediately formed and may be isolated and subsequently decarboxylated by heating. Examples are given.
Patent GB-1429255-A (GB)
Title: Process for the nitration of aromatic compounds
IPC: C07C315/04
Filed: 1973-09-28
Abstract: 1429255 Nitration of aromatic compounds CIBA-GEIGY AG 28 Sept 1973 [5 Oct 1972 6 Dec 1972] 45610/73 Heading C2C Aromatic compounds are nitrated by reacting them with concentrated nitric acid, nitrogen oxides, acetyl nitrate, or a mixture of concentrated nitric acid with acetic acid, sulphuric acid, or acetic anhydride, optionally in the presence of an inert dipolar aprotic solvent, and halting the reaction by diluting the mixture with a dipolar aprotic solvent after the desired degree of nitration has been attained. The dipolar aprotic solvent preferably has the general formula where R 1  and R 2  are each C 1  to C 4  alkyl or optionally substituted phenyl and X is an optionally substituted straight or branched C 4  to C 10  hydrocarbon radical. Exemplified aromatic compounds are anthraquinone, naphthalene and benzene.
Patent GB-1463328-A (GB)
Title: Safety device for a conveyor
IPC: B66B13/28
Filed: 1974-10-23
Abstract: 1463328 Retractive switches KORNYLAK CORP 23 Oct 1974 [23 Oct 1973] 45946/74 Heading H1N A safety switch for use at a conveyer loading station comprises a plate 29 depressible by a first load such as the weight of a man and plates 7, 8 and 11, 12 each hinged to a central fixed section 3 by hinges 9, 10, 13, 14, and depressible by a higher second load such as the weight of a fork lift truck. Fig. 2 shows a plate in its depressed position, when abutment 23<SP>1</SP> on the underside of angle plate 17 welded to plate 12 is depressing microswitch 24 adjustably threaded into tube 26 welded to base-plate 4. Spring 22 in tube 21 urges piston 23 upwards and hence urges the plate to pivot clockwise about hinge 14 when no-load is on the plate. Plate 29 is not hinged but moves vertically having microswitches and springs at each end. A circuit is described in which switch plates 7, 8 have to be depressed by the truck to prepare the circuit before plates 11, 12 are depressed to actually stop the conveyer and when the truck backs away, retraction of plates 11, 12 does not start the conveyer until the truck has rolled over plates 7, 8 and left them. Depression of plate 28 stops the conveyer without the other plates having to be depressed first. The weight of a man alone will not depress plates 7, 8 or 11, 12.
Patent GB-1041595-A (GB)
Title: An improved animal holding device
IPC: A61D3/00
Filed: 1963-11-22
Abstract: 1,041,595. Animal holding appliances. T. S. LEWENS. Nov. 23, 1964 [Nov. 22, 1963], No. 46318/63. Heading A5R. An animal holding appliance comprises a transverse lower element 6 with a median downward depression 7, for receiving an animal's neck, which element is adjustable in height, and an articulate transverse upper element 9 for retaining the neck in the depression. The lower transverse element 6 is supported by vertical side members 3 with respect to which it is vertically adjustable, the lower part of the depression being supported by a cross-bar 5. The upper element is pivotal at one end to the lower element or a side member, Fig. 4 (not shown). A releasable spring catch 12 secures the upper element at the other end to hold the animal's neck. The side members 3 are mounted at corners of a base frame 1, which contains a wooden tray 2, and are supported by struts 4. The upper and lower elements may be pivotal about one vertical side member, Fig. 4 (not shown), to form a gate, the free ends of the elements carrying a latch for engagement with the other side member.
Patent GB-1183801-A (GB)
Title: Improvements in Gear Box Synchronising Apparatus.
Inventor: GALICHER GEORGES CAMILLE EUGEN
IPC: F16H3/78
Filed: 1968-09-30
Abstract: 1,183,801. Positive clutches; change-speed gear; clutch-brake combinations. G. C. E. GALICHER. 30 Sept., 1968, No. 46366/68. Headings F2C, F2D and F2L. In a friction synchronized positive double clutch or, as shown, a clutch-brake unit for a change speed gear wherein initial axial movement of a sleeve 17 having teeth 18, 21 engageable with clutch teeth 5 on a shaft 1 and brake teeth 22 on a fixed casing 23 acts through bars 49 to move a synchronizing ring 32 or 33 into engagement with a friction surface 41 or 43 on the shaft 1 and casing 23 respectively whereupon friction drag turns baulk pins 46 fast with the rings 32, 33 relative to a flange 26 on the sleeve 17 to prevent further axial movement of the sleeve 17 until synchronism is attained, the baulk pins 46 pass through arcuate slots 37 in the flange 26 which permit the sleeve 17 to rotate relative to the baulk pins 46 to align the clutch teeth for engagement during further axial clutch engaging movement of the sleeve 17. The ends of the clutch and brake teeth 5, 18, 21, 22 are inclined so that axial movement of the sleeve 17 aligns the teeth for engagement by rotation of the sleeve 17 in the direction permitted by the slots 37. The length of the slots 37 is sufficient to permit the sleeve 17 to rotate through an angle equivalent to the pitch of the teeth. The bars 49 have central projections (58, 59) which co-operate with slots 51 in the flange 26 and the ends of the bars slide in grooves 61, 62 in the rings 32, 33. As shown the sleeve 17 is splined on the hub of a ring gear 9 meshing planet pinions 8 carried by an output shaft 2. The pinions 8 mesh an input sun gear 7. Engagement of the brake 21, 22 holds the ring gear 9 for reduced ratio whilst engagement of the clutch 5, 18 connects the sun and ring gears 7, 9 for direct drive.
Patent GB-1274563-A (GB)
Title: A high voltage semiconductor rectifier unit
Inventor: SARALIDZE ANTON LAVRENTIEVICH
IPC: H02M7/10
Filed: 1970-10-02
Abstract: 1,274,563. Semi-conductor rectifiers. A. L. SARALIDZE, and A. L. EFREMIDI. 2 Oct., 1970, No. 46889/70. Heading H1K. A high voltage silicon semi-conductor rectifier unit comprises a chain 1 of series diodes 2 disposed between two common opposed metal screens 3, 4 symmetrically inclined to the plane of the diodes; + ve end of the chain being connected to earth and screen 3 while - ve end b is connected to live supply and screen 4. The chain is split into groups 5, each capacitance shunted at 6, and disposed within subordinate opposed metal screens connected to corresponding ends (Fig. 1). Structurally (Figs. 2, 3, 4, not shown), the diodes and capacitors are arranged in a single layer in a flat surface to reduce mutual inductance, and the distributed capacitance between the common and the group screens 3, 4 and 7, 8 varies along the chain according to a law predetermined by the inter-screen spacing, and each group 5 comprising two epoxy potted rectifier stacks, is carried by insulators and disposed between group screens 7, 8 and shunted by capacitors 6. Stepped insulation is disposed between screens 3, 4 and 7, 8. The insulation thickness and inter-screen capacitance are graduated for each diode in accordance with its potential. The outer screens 3, 4 are jumpered to the ends of the diode chain and led out through insulator bushings, while the unit is enclosed in an insulated casing or may be oil-immersed. At lower voltages group screens 7, 8 may be dispensed with.
Patent GB-1113251-A (GB)
Title: System for generating selected numbers of pulses
Inventor: MARTINEK MILOSLAV
IPC: G05B19/4103
Filed: 1965-11-10
Abstract: 1,113,251. Pulse generation; digital machine too) control. V¦ZKUMN¦ USTAV MATEMATICK¦CH STROJ#U. 10 Nov., 1965, No. 47671/65. Heading G4A. Apparatus for generating one or more pulse trains of preselected number or numbers of pulses with a substantially even pulse spacing comprises either a plurality of shift registers each with a feedback line for recirculating numbers in a given code notation or a single shift register with a feedback line for recirculating a plurality of interlaced numbers in a given code notation, incrementing means for incrementing one of said numbers each cycle and evaluating means for issuing a pulse when certain predetermined conditions exist. In a two-coordinate system shown in Fig. 4, the binary values of the numbers of pulses A and B required in the X and Y directions respectively are stored in recirculating stores comprising shift registers 40a, 40b with feed-back lines 41a, 41b respectively. A further recirculating store (or accumulator) comprising a shift register 20 with a feed-back line 15 is provided for a variable number N. Included in the line 15 is a binary adder 100 (Fig. 5, not shown), the carry-round path e of which includes a oneperiod delay 101 and an OR-gate 106. Also coupled to the OR-gate 106 is a unit (+1) for producing a pulse once every cycle of the registers for gradually incrementing the number N from zero to its maximum value (seven in the example, but 1000 or more in practical embodiments). An evaluating unit 300 comprising AND-gates 302-304 and an inverter 301 is provided for generating the required pulses on lines X and Y respectively when the following conditions all apply (i) the input a to adder 100 is 0, (ii) the output d from adder 100 is 1, (iii) the output from registers 40a or 40b are 1. A unit 46 is provided for terminating operations at the end of the work cycle. The distribution of the generated pulses between the co-ordinates is such that the machine tool moves in as near a straight line as possible having regard to the digital nature of the control. In a modified embodiment (Fig. 8), a single shift register is provided and the numbers N, A, B are circulated therein in interlaced manner. The evaluating unit (300) contains delay elements to enable digits arising at different times to be compared. In a further embodiment (Fig. 10, not shown), binary-coded decimal (excess six code) numbers are circulated with consequent modifications to the adder arrangement. The increments (to N) may vary from + 1 and means for speeding up the timing when the numbers A, B &c. include preceding zeros is referred to. The apparatus of the invention may control the movement of a machine tool in one or more oo-ordinates.
Patent GB-1400354-A (GB)
Title: Fluid flow control valve
IPC: F16K3/04
Filed: 1973-10-15
Abstract: 1400354 Valves CITATION COMPANIES Inc 15 Oct 1973 [15 Nov 1972] 48001/73 Heading F2V A replaceable cartridge valve for a tap comprises a cylindrical cartridge housing 16, Fig. 3, an operating stem 18, a cylindrical tailpiece 26 secured to the housing, a stationary valve member 24 fixed to the tailpiece and a rotary valve member 22, the valve members having flat highly polished ported surfaces in abutment with one another. The cartridge valve is shown assembled to the tap body 52 and retained by a bonnet 60. The valve members 22, 24 may be of ceramics, the stem 18 of brass and the remaining parts of the cartridge assembly of thermoplastics material, the housing 16 and tailpiece 26 being solvent-bonded together. The stem carries a radial arm 46 which cooperates with abutment surfaces on an upstanding rib 40 on the housing to define the fully open and closed positions. A torsion spring (96), Fig. 10 (not shown), may be provided around the stem to render the valve self-closing.
Patent GB-1287413-A (GB)
Title: Automatic lathes
Inventor: GILBERT HAROLD JAMES
IPC: B23Q39/04
Filed: 1968-10-10
Abstract: 1287413 Automatic lathes WICKMAN MACHINE TOOL SALES Ltd 11 Nov 1969 [10 Oct 1968] 48029/68 Heading B3T In an automatic machine tool such as an automatic lathe in which a rotary cam is provided to control the feed and return movements of the or each tool slide, the operative portion of each cam surface is adjustable relative to the axis of rotation of the cam to facilitate adjustment of the stroke of the tool slides. Cam portions 26 and 27 are securable to a rotatable member 25 which is mounted on a drive-shaft 24 rotatable about an axis perpendicular to the direction of movement of the tool slide, the portion 26 being provided with projections 33 which engage in slots 32 in the member 25. An eccentric 35 located in bore 39 in the cam portion 26 engages a bush 38 in the member 25 whereby rotation of the eccentric 35 effects lateral adjustment of the cam portion 26 relative to the rotatable member 25. The cam portion 26 is secured in its adjusted position by bolts 30. The other cam portion 27 with its cam surface 29 is secured in an adjusted position by bolts 42.
Patent GB-1207846-A (GB)
Title: Pneumatically actuated logic element
IPC: F15C3/04
Filed: 1967-10-23
Abstract: 1,207,846. Valves. MAGYAR TUDOMANYOS AKADEMIA AUTOMATIZALASI KUTATO INTEZET. 23 Oct., 1967 [21 Oct., 1966, No. 48103/67. Heading F2V. [Also in Division G4] A valve for use as a logic unit comprises three rigidly coupled diaphragms 3, 4, 5, Fig. 1, which together with two partitions 6, 7 divide a chamber into six compartments, each having its own entry port. The compartments on either side of the central diaphragm can be isolated by arranging either that the central diaphragm acts as a valve closure member with both of the partitions 6, 7 or that the upper and lower diaphragms act as valve closure members with the upper and lower partitions respectively (as in Fig. 2, not shown).
Patent GB-1059375-A (GB)
Title: A process for the production of trimethylene-1,3,5-trisulphone
Filed: 1963-12-06
Abstract: Trimethylene-1,3,5-trisulphone is prepared by oxidation of trimethylene-1,3,5-trisulphide with one or more per compounds in the presence of one or more acids at a temperature between 35 DEG  and 110 DEG  C. until a compound having the formula (CH2S)3On has been formed having an oxygen content of n between 2 and 5 and then further oxidizing this intermediate compound at a temperature between 20 DEG and 100 DEG  C. with acid permanganate solution.  The expression " per compounds " is defined as " compounds containing the group -O-O-H."  The specified per compounds include hydrogen per oxide, organic hydroperoxides, and inorganic and organic per-acids.  The first stage of the reaction is preferably conducted so that the intermediate product occurs in a very finely divided form, suitably by stirring at speeds of 500 to 900 r.p.m.  The precipitate from the second reaction stage is preferably extracted with sodium hydroxide solution and the resultant solution is treated with a solution containing potassium ions to give a precipitate of the potassium salt of trimethylene-1,3,5-trisulphone which may then be dissolved in water and acidified to give a precipitate of trimethylene-1,3,5-trisulphone. Trimethylene - 1,3,5 - trisulphide may be obtained by passing hydrogen sulphide into a hydrochloric acid solution of formalde hyde.ALSO:Peroxomonosulphuric acid is prepared by adding ice to 162 g. of potassium peroxodisulphate and 178 g. of concentrated sulphuric acid until the volume of the mixture is 800 c.c.  Peroxomonophosphoric acid is prepared by dissolving 34 g. of 60% aqueous hydrogen peroxide solution in 200 c.c. of acetonitrile at 0 DEG  C., adding 50 g. of phosphorus pentoxide in portions while stirring at 0 DEG  to 10 DEG  C., and then stirring the mixture at room temperature until a clear solution has been formed.
Patent GB-1122308-A (GB)
Title: Improvements in or relating to a process for the stabilisation of soil
Inventor: LEES WILLIAM ARTHUR
IPC: C09K17/50
Filed: 1965-11-12
Abstract: A dry composition for use in aqueous solutions as a soil stabilizer comprises a vegetable tannin extract, e.g. mimosa, quebracho, eucalyptus crebra and callitris calcarata and glasuca, a water-soluble phenol-formaldehyde resole and an alkali-metal hydroxide or a mixture which generates such an hydroxide in water. Cellulose thickeners, water-soluble, inorganic salts and bentonite may be incorporated.
Patent GB-1491202-A (GB)
Title: Catheter or tube having a tip which is high in opacity to x-rays
IPC: A61M25/00
Filed: 1973-10-17
Abstract: 1491202 Coated products WARNE SURGICAL PRODUCTS Ltd 8 Oct 1974 [17 Oct 1973] 48441/73 Heading B2E A method of making a catheter or tube useful for medical or surgical purposes having at the patient end (as defined) a coating of a finely-divided, highly X-ray opaque substance, in which to the patient end is applied a paste which comprises a finely-divided substance which is high in opacity to X-rays and which has a particle size of not greater than one micron, dispersed in a solution of a synthetic polymer dissolved in at least one organic solvent which is evaporatable and which will soften the synthetic plastics material of which the patient end is made, and allowing the solvent to evaporate thereby to form the coating. The coating may be formed by transfer printing, brushing, spraying or, preferably, dipping. The synthetic polymer solution is preferably saturated, and the weight of X-ray opaque substance is preferably about equal to that of the synthetic polymer. The synthetic polymer is preferably polyvinylchloride or polyurethane, the X-ray opaque substance is preferably bismuth, precipitated barium sulphate or tungsten, and the solvent is preferably cyclohexanone, methyl ethyl ketone, tetrahydrofuran or mixtures thereof.  In the Examples; the synthetic polymer is (1) polyvinylchloride, (2) polyurethane; the X-ray opaque substance is (1) (2) bismuth, precipitated barium sulphate, tungsten, the solvent is cyclohexanone and/or methyl ethyl ketone, (2) tetrahydrofuran; the tubing is (1) (2) polyvinylchloride, (2) polyurethane.
Patent GB-1016794-A (GB)
Title: Switch device for the lamps of an electric moving sign
IPC: G09G3/00
Filed: 1963-12-10
Abstract: 1,016,794. Signs. I. C. IUUL. Dec. 10, 1963 [Dec. 11, 1962], No. 48638/63. Heading G5C. [Also in Division H2] Control mechanism for moving signs of the kind in which electric lamps arranged in a fixed field are selectively illuminated to provide travelling words or other information comprises self-adhesive metal foil symbols 82 fixed on an endless band 18 moved under a bank of plunger contacts 38 (see Division H2) mounted in rows (Fig. 2, not shown) in insulating carriers 36 arranged around a drum 14 (Fig. 1, not shown). A motor 41 drives the belt 18 by means of a roller 26, and a brake 24 ensures that the band 18 lies tightly in a groove 16 in drum 14. The plunger contacts 38 are each connected to a respective lamp and a further plunger contact 42 is provided at the end of each transverse row (Fig. 2, not shown). The plungers 42 provide common feed connections to the symbols 82, each of which has a co-operating strip 84 (Fig. 3) lying outside the letter-forming part of the symbol. The strips 84 extend beyond the width of the symbols so that the connection to a plunger 42 is made before or broken after that to plungers 38, thereby avoiding spark damage due to the total current from a plurality of lamps being controlled by the single plunger 42. Symbols having two legs, for example A and R, may have a strengthening strip 88 lying outside the path of plungers 38.
Patent GB-1524107-A (GB)
Title: Circuit arrangement for an acoustic generator
IPC: B06B1/02
Filed: 1976-11-23
Abstract: 1524107 Tone generators INTERNATIONAL STANDARD ELECTRIC CORP 23 Nov 1976 [3 Dec 1975] 48775/76 Heading G5J In an acoustic generator, the mark-space ratio of the signals from oscillator AM to switching transistor T, and hence the volume of the sound from loudspeaker L, is varied by adjusting the RC value of a monostable M3 timing circuit. Additional circuitry (Fig. 2, not shown) ensures maximum and minimum values for the mark-space ratio.
Patent GB-1419373-A (GB)
Title: Wood preservatives
IPC: B27K3/36
Filed: 1971-10-21
Abstract: 1419373 Wood preservative PROTIM & GALLWEY LTD 21 Nov 1972 [21 Oct 1971] 49087/71 Heading A5E [Also in Division D1] A wood preservative comprises at least 89% by volume organic solvent, e.g. white spirit, 0.4 to 0.6% by volume of fatty acid ester formed from a long chain fatty acid having at least 8C atoms in the chain and a long chain alcohol having at least 8C atoms in the chain, and a wood preserving agent. The fatty acid ester may be stearyl laurate, myristyl myristate or lauryl palmitate. The preservative may also contain pentachlorophenol, benzene hexachloride, tributyl tin oxide and resin. The preservative can be applied to wood by double vacuum impregnation.