baber/WOPTO huggingface dataset:
Patent GB-1527760-A (GB)
Title: Stabilization of chromium dioxide magnetic pigments
IPC: G11B5/712
Filed: 1975-12-17
Abstract: 1527760 Stabilization of chromium dioxide BASF AG 17 Dec 1975 [18 Dec 1974 1 Sept 1975] 51568/75 Heading C1A Magnetic chromium dioxide particles are suspended in an aqueous and/or alcoholic medium containing the compound R n SI(OR<SP>1</SP>) 4-n  or a hydrolysis product thereof (wherein R is organic of 1-18 C, R' is aliphatic either with 1-8 C in an uninterrupted chain or with 1-10 C in a chain interrupted by oxygen and n is 1, 2 or 3) and are subsequently isolated with a coating of an at least partial hydrolysis product of the silane and dried at 50-200‹ C. Silanes exemplified are isobutyl-, vinyl-, y-methacryloxypropyl, and y-glycidyloxypropyltrimethoxy- and n-propyltrimethoxy-silanes. An acid or base may be added to ensure hydrolysis. The dried product may be heated at 70-200‹ C. before processing into magnetic recording media.
Patent GB-1084897-A (GB)
Title: Improvements in or relating to fluid control valves
Inventor: OBERMAIER FRANK EDWARD
IPC: G05D23/02
Filed: 1965-12-06
Abstract: 1,084,897. Valves. DOLE VALVE CO. Dec. 6, 1965, No. 51599/65. Heading F2V. A thermostatically controlled valve comprises a valve seat member 17 connected to a base 14 and a stirrup 13, the stirrup forming an abutment for a rod 32 of a thermal actuator 27. A valve closure 19 is operatively connected to the power device and is loaded by a spring 36 towards the seat. The closure 19 has a groove 23, formed by undercuts 24, 25, which receives an 0-ring 22, the opening of groove being less than the natural diameter of the ring crosssection. When the valve closes, the 0-ring seats prior to the seating portion 21 on the closure 19.
Patent GB-1089683-A (GB)
Title: Production of sodium trimetaphosphate products
IPC: C01B25/445
Filed: 1964-12-18
Abstract: Na trimetaphosphate, or a mixture with other condensed phosphates, having a Na/P ratio below 1.45, is produced by maintaining a mixture of H3PO4 and a Na halide, having the required Na/P ratio, at 275-625 DEG  C. without melting until the product contains more than 25% trimetaphosphate. Heating may be continued until at least 75% of the H3PO4 has reacted.  A slurry of the acid and halide may be introduced into a rotary calciner containing a hot bed of particulate product, the weight of the slurry being at most half that of the bed, so that the temperature does not fall below 400 DEG  C.  The mixture is then heated at 400-625 DEG  C. until reaction is complete, and the product is ground and screened if necessary and divided into 2 parts (e.g. 12:1), the larger of which is returned to the calciner.  The process may be operated batchwise or continuously. NaCl, NaBr, NaI or NaF may be used, and the acid may be wet process acid (containing some HCl) from treating phosphate rock with HCl, or "superphosphoric" acid (P2O5 content up to 87%).
Patent GB-1178610-A (GB)
Title: A Sealed Knob to Panel Assembly
Inventor: SECKERSON CLIFFORD ALEXANDER
IPC: F16J15/34
Filed: 1967-11-15
Abstract: 1,178,610. Seals. F. T. PRODUCTS Ltd. 15 Nov., 1968 [15 Nov., 1967], No. 52093/67. Heading F2B. A flexible washer 21 mounted on a knob 10 or a rotatable shaft 11 forms a wiping seal around an aperture 12 in a glass panel 13. The washer may be made from acetal resin and formed with a flared lip 21.
Patent GB-1092528-A (GB)
Title: Method for the manufacture of formable resin materials
IPC: C08G59/68
Filed: 1964-12-22
Abstract: A formable resin material is produced by mixing an unsaturated polyester resin or an epoxy resin and an aluminium alkoxide, or a chelated derivative thereof, in the substantial absence of free water and then raising the viscosity of the mixture by imparting free water to the mixture.  Free water is defined as water free to react with the aluminium alkoxide, e.g. water present in resins, alkoxides, curing agents, accelerators, inhibitors, catalysts, reinforcing agents such as glass fibres, rock wool, asbestos, and natural or synthetic fibres, and fillers such as glass powder, CaCO3, and mica. Free water may also be supplied by heating the resin in the presence of compound containing water of crystallization, or compounds which decompose to yield water, e.g. chloral hydrate, or silica gel or zeolites.  In Examples 1,2 and 4 to 7 polyester derived from ethylene glycol, propylene glycol, maleic anhydride and phthalic anhydride is used.  It is mixed in Examples 1 and 4 with a styrene solution of (ethyl malonate)-aluminium dibutoxide and dicumyl peroxide and the mixture is used to impregnate glass fibre cloth containing free water or dry glass fibre cloth.  The impregnated materials are heated, in a humid atmosphere in the case of the dry cloth.  The same mixture is mixed in Examples 5 and 6 with alum and heated either alone or on a glass fibre roving substrate.  The polyester mixture heated in Example 2 comprises a styrene solution of (acetoacetic ester)-aluminium di-isopropoxide, di-t.-butyl and peroxide chloral hydrate and the mixture in Example 7 comprises a methyl methacrylate-polymethyl methacrylate syrup, benzoyl peroxide, (ethyl malonate)-aluminium dibutoxide and alum.  In Example 3 an epoxy resin, Epon 828, is mixed with hexahydrophthalic anhydride, aluminium isopropoxide and alum and applied to dry glass fibre cloth which is then heated.
Patent GB-1454867-A (GB)
Title: Process for activating supported catalysts for the conversion of olefins
IPC: C07C6/04
Filed: 1974-12-03
Abstract: 1454867 Olefin conversion catalyst DEUTSCHE TEXACO AG 3 Dec 1974 [7 Dec 1973] 52256/74 Heading B1E [Also in Division C5] Olefin conversion e.g. disproportionation, catalysts which have been coloured at 300- 800C are activated by impregnation with an alcoholic solution of an alkali metal salt, hydroxide or alcoholate and recalcination at 400-700C for 0.5 to 8 hours. The catalyst so treated may comprise Mo, W, Nb, Ta, V, Co, Ni or Re on a carrier, e.g. alumina or aluminium hydroxide, kieselguhr, pumice, titania or active carbon. The Example describes the treatment of a catalyst comprising molybdenum and cobalt oxide on alumina with an alcoholic solution of potassium hydroxide.
Patent GB-1263580-A (GB)
Title: Improvements in or relating to the production of a tubular body of a semiconductor material
IPC: C30B29/60
Filed: 1969-10-29
Abstract: 1,263,580. Tubular semi-conductor bodies. SIEMENS A.G. 29 Oct., 1969 [30 Oct., 1968], No. 52887/69. Heading C1A. An apparatus for the production of a tubeshaped body 62 of semi-conductor material comprises a carrier body 54 of electrically conductive material which projects into a reaction chamber 51, has the shape of a hollow finger closed at its end which is within the reaction chamber and is fitted to the walls of the reaction chamber, wherein an electrical conductor 58 is disposed within the carrier body such that it is insulated from all parts thereof except the closed end to which it is connected, and wherein an electrical conductor 60 is connected to the other end of the carrier body. The layer of semiconductor material is deposited by thermal deposition from an appropriate reaction gas on to the surface of the carrier body which is heated to the deposition temperature, the layer of semiconductor thus formed then being removed from the carrier body. The carrier body is preferably graphite, tantalum, molybdenum or tungsten. The reaction gas may be a mixture of silicochloroform and hydrogen, the semi-conductor which is deposited being silicon.
Patent GB-1369692-A (GB)
Title: Method of reducing level fluctuations caused by distortion and  apparatus therefor
IPC: H04B3/10
Filed: 1971-11-15
Abstract: 1369692 Radio signalling LICENTIA PATENT-VERWALTUNGS-GmbH 15 Nov 1971 [17 Nov 1970] 52913/71 Heading H4L In a system for reducing level fluctuations in the baseband in a frequency-modulation transmission system caused by echo distortion during transmission, at the transmitter 1a plurality of pilot tones q 1 , q 2 , q 3  phase modulate the F.M. signal s 0  which has been phase shifted at 2 by 90 degrees, the resultant signal being added to s 0  at x. The pilot signals are arranged to be distributed as widely as possible over the baseband. At the receiver 3 the received signal S 1  is supplied via networks N 1 , N 2 , which introduce distortion reducing signals, to a frequency discriminator FD whose output x contains the signal bands and the pilot signals q 1  &c. The output x is supplied to a mixer M receiving sequential frequencies q<SP>1</SP> 1 , q<SP>1</SP> 2 , q<SP>1</SP> 3  under the control of a rotary switch Sch driven by circuit ST and the output of the mixer is passed through a bandpass filter BP1. By this means each pilot signal is transposed successively into an intermediate frequency Z which is amplitude modulated in accordance with the distortion on the pilot signals at the sampling periods. Signal Z is demodulated at G 1  and supplied via bandpass filter BP2 to a rectifier G2, the output of G2 being smoothed via a low pass filter TP to provide a voltage v which is a measure of the distortion. This voltage causes an optimizer 5 automatically to adjust resistors R1, R2 &c. which terminate lines L1, L2 &c. whereby compensating echo signals in phase opposition to the echo distortion are introduced via networks N1 &c. into the signal S1. The output of discriminator FD is supplied via an amplitude and phase correcting filter BP3 to a phase modulator T12 receiving also the signal S 1  phase shifted by 90 degrees, the output of the phase modulator being combined in phase opposition with the signal S 1  to remove the pilot signals therefrom.
Patent GB-1526090-A (GB)
Title: Amplifiers
IPC: H03F3/19
Filed: 1975-12-29
Abstract: 1526090 Transistor amplifiers WESTERN ELECTRIC CO Inc 29 Dec 1975 [30 Dec 19741 53058/75 Heading H3T A non-inverting amplifier, for use e.g. as a repeater in a coaxial line, for coupling a source of impedance Z S  to a load of impedance Z L , includes frequency dependent negative feedback paths 13, 14 providing series voltage feedback a V out  and a shunt current feedback bI out , respectively, where a/b is real and equal to Z S */Z L =Z S /Z L *, the resulting power gain is G= 1/|ab|, and where the input and output impedances of the amplifier are the conjugates Z s *, Z L *, respectively. The transistors are isolated by low pass filters 17, 18. An autotransformer 22 is included to reduce the input impedance seen by the amplifier, to keep the noise figure low.
Patent GB-1172839-A (GB)
Title: Electrophotographic Developer Materials.
IPC: G03G9/097
Filed: 1966-11-29
Abstract: 1,172,839. Xerographic developers. RANK XEROX Ltd. Nov.29, 1966 [Dec. 2, 1965], No.53505/66. Heading G2H. A xerographic cascade developer comprises 1 part by weight of toner particles, 10-200 parts of non-magnetic carrier particles, and 0À02-20 wt.% based on the toner of at least one solid, stable hydrophobic metal salt of a fatty acid at or immediately adjacent external surfaces of the toner and/or carrier particles. The salt may be loosely mixed with, or dispersed throughout the particles, or milled into their surfaces. Suitable toner particles consist of styrene/n-butyl methacrylate copolymer, polyvinyl butyral and carbon black, and suitable carriers are NaCl, NH 4  Cl, Al KCl 4 , SiO 2  Rochelle salt, NaNO 3 , Al(NO 3 ) 3 , KClO 4 , Zr, Si, polymethyl-methacrylate, glass and sand.
Patent GB-1371679-A (GB)
Title: Isocyanates and processes for their production
IPC: C07D273/00
Filed: 1972-11-22
Abstract: 1371679 Dioxazolinones and dioxazindiones BAYER AG 22 Nov 1972 [26 Nov 1971] 54015/72 Heading C2C Novel isocyanates of the formula where R is an organic radical of valency m + n, x is 1 or 2, m is from 1 to 4 and n is from 1 to 4, are obtained by reacting amines of the formula (H 2 N) m -R-(CO-NH-OM) n , M being the equivalent of a metal, with phosgene or oxalyl chloride at - 25 to + 200 C.
Patent GB-1236578-A (GB)
Title: Nuclear reactor installations
Inventor: EBELING DOUGLAS ROY
IPC: G21C9/00
Filed: 1967-11-29
Abstract: 1,236,578. Cooling reactors. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. 14 Nov., 1968 [29 Nov., 1967], No. 54370/67. Heading G6C. The reactor core 1 is cooled by the circulation of boiling water upwards through the vertical fuel tubes 4 mounted within a heavy water moderator contained in a Calandria tank. The coolant circuit 2 and core 1 are mounted within the concrete pressure vessel 3 which has an atmosphere of pressurized carbon dioxide gas. The gas and water pressures are substantially the same and thus a large fracture of the coolant circuit is unlikely. Depressurization of the pressure vessel causes ejection of plugs from the Calandria and the flashing off of steam from the moderator thereby reducing moderation and core reactivity.
Patent GB-1454939-A (GB)
Title: Cement lasting machine
IPC: A43D25/047
Filed: 1974-12-17
Abstract: 1454939 Lasting shoes INTERNATIONAL SHOE MACHINE CORP 17 Dec 1974 [6 May 1974] 54473/74 Heading A3B A cement lasting machine has wipers, e.g. heel wipers, moved across an insole and upper assembly bottom-up on a support with the part of the insole to be cemented disposed parallel to the plane of movement of the wipers, the support being movable vertically to engage the insole with a hold-down, when cement applying means are positioned against the juncture between the insole and the upper and a brake applied to retain the support, &c in the vertical position, the hold-down then being withdrawn so as not to foul the cement applying means which move along the insole and on completion of their movement are withdrawn, the wipers subsequently performing a wiping stroke and the brake being released allowing the support to press the wiped portion against the wipers. As shown, a last pin 20, Figs. 1, 2, 3, is mounted on a bar 14 raised, &c relative to a sleeve 10 by a pneumatic servo 16. A toe rest 24 is raised simultaneously by its support bracket 38. Brake fingers 36, Fig. 3, on the ends of levers 28 are engaged with the bracket 38 to retain the last pin 20, &c vertically when a servo 30 is energized. A pair of tables 52, Figs. 1, 2, are adjusted up and down in the machine by turning a pair of knobs 50 which act through screws and nuts (46, 48), Fig. 5 (not shown). Each table 52 can be pivoted about an associated pin (60) running fore-and-aft through the machine by turning a respective knob 70 to actuate a screw-andnut (68, 64). Lasting units 72, Figs. 1, 2, as in Specification 1378631, each consist of a set of straps, Figs. 5, 6 (not shown) with each strap actuated by pneumatic servos, are mounted for inward-outward movement on their respective tables 52 by pneumatic servos 74. A hold-down 278, Fig. 8, is connected via linkage 280 to an actuating servo 274, the whole being mounted on a hold-down plate slidden back-and-forth by a pneumatic servo (270), Fig. 11 (not shown). Heel wipers 256, Fig. 16, are guided by rollers 260 on a main slide 164 engaging in cam slots 262 and are actuated through links 258 and a piston rod 252 by a servo (248), Fig. 12 (not shown). A resilient heel clamp 212, Fig. 13, is movable on a heel clamp slide plate 172 by two pneumatic servos 180 pivoting on pins 182 and cutting through limited movement links 198. 206, the heel clamp plate 172 itself being spring biassed forwardly on the main slide 164. A carrier plate 294, Fig. 17, slides on bars 290 backwards and forwards in the machine when a double-acting servo 295 is actuated, and mounts a cement heating and applying mechanism 336, Figs. 1, 2, with servo pivoted arms 394 and nozzles 396 for applying cement along the margins of the insole and upper as in Specification 1437675. The nozzles 396 are initially moved into engagement with the margins of the insole with a relatively high pressure, and are maintained in such engagement at a relatively low pressure, as claimed in Specification 1454940. For Figures see next page
Patent GB-1195150-A (GB)
Title: Fail Safe Monitor.
IPC: G05B9/02
Filed: 1968-11-18
Abstract: 1,195,150. Pulse circuits. BENDIX CORP. 18 Nov., 1968 [24 Nov., 1967], No. 54535/68. Heading H3P. [Also in Divisions G1 and G4] Two signals E, E o  are compared by a circuit comprising a pulse generator (formed for example from two monostables 8, 14) whose output pulse Eg is initiated by a starting pulse source 2, and is combined with the input signals whereby a pulse E 3  is produced whose maximum and minimum levels depend upon the difference between the two redundant signals; if the pulse E 3  crosses the reference voltage E R  (Fig. 2, not shown) as detected by an amplitude detector 28, a pulse E 4  is generated which causes the generator to produce another output pulse so that a continuous pulse train is generated; and if no crossover occurs (Fig. 3, not shown), the pulse generator stops and an alarm 36 is operated. A summing circuit 25 combines the pulse Eg and one signal E, and a differential amplifier 22 combines the resultant with the other signal E 0 , polarities being as shown. Where the difference between the input signals is within a permitted range, the pulse Eg (also Fig. 4, not shown) crosses the reference voltage level E R  to produce the pulse E 4 , but where the difference exceeds the range, the level of the pulse E 3  falls or rises (Figs. 3, 4, respectively, not shown) according to the polarity of the difference. Crossover cannot then occur, and oscillation stops. Inverters 6, 12 precede the monostables and the second inverter is connected also to a logic device 41 for controlling other functions. The signals E, Eg may be from a dual channel aircraft control system.
Patent GB-1208299-A (GB)
Title: Improvements in and relating to disc brakes
Inventor: HODKINSON HAROLD
IPC: F16D55/226
Filed: 1967-12-01
Abstract: 1,208,299. Disc brakes; bolts. AUTOMOTIVE PRODUCTS CO. Ltd. 4 Nov., 1968 [1 Dec., 1967], No. 54699/67. Headings F2E and F2H. A disc brake comprises brake pads 26, 27 on either side of a disc 17, a yoke supporting structure 10 including on one side of the disc an hydraulic wheel cylinder 11 and a yoke 22 slidable in an axial direction and supported on both sides of the disc, sliding on the side away from the wheel cylinder over a portion of the structure extending over the disc, the wheel cylinder having opposed movable pistons 18, 19 which operate on the pads, one directly, the other via the yoke. The structure includes a plate 16 bolted to cylinder 11 and extending over the disc to a cranked portion 32, 33 which supports the yoke via a pin 37 extending through an angle piece 34, the yoke, a slot 41 in the cranked portion 33 and a spring 42 which holds the yoke against the portion 33. On the other side of the disc a tongue 29 of the yoke is supported in a slot in a disc 31 mounted in piston 19. The pads have backing-plates 46, 47 which are located by surfaces 49 and shoulders which rest on co-operating surfaces (31), Fig. 2 (not shown) to limit inward radial movement whilst outward movement is prevented by a blade spring 53. The outer -portions of the yoke on two or four sides may be deflected. In another embodiment the disc 31 is replaced by a-bush in piston 19, and the pin 37 and spring 42 by a nut and bolt and a dished washer. The head of the bolt has a pair of opposed flats extending over only a part of the head thicknes.
Patent GB-1248645-A (GB)
Title: Vegetable stripping apparatus
IPC: A01D45/26
Filed: 1969-11-12
Abstract: 1,248,645. Stripping vegetables from stalks. PRODUITS FINDUS S.A. 12 Nov., 1969 [29 Nov., 1968], No. 55384/69. Heading A1F. [Also in Division A4] A tractor attachment for harvesting and stripping vegetable plants (but which may be used solely for stripping, not on a tractor) includes a stripping conveyor 2 comprising an endless chain passing round pulleys (not shown) and carrying stripping fingers 21 for surrounding the plant stalks and a gripping conveyor 5 comprising an endless chain passing round pulleys (not shown) and carrying pairs of gripping fingers for gripping the plant stalks therebetween wherein the conveyor 5 diverges from the conveyor 2 (or viceversa). Each vegetable plant is uprooted by a resiliently-mounted plough share 10, is picked up between the fingers 21 as the stripping conveyor chain turns around its lower pulley, and is carried upwards to the gripping conveyor 5 where, as the chain turns around an end pulley, the stalk is gripped between the fingers and a fixed rail at a point below the stripping fingers 21 so that the stalk is drawn through the space 22 to strip the vegetables therefrom. An auxiliary conveyor 6 comprises a flexible undulated belt attached to an endless chain and co-operating with a fixed rail, and maintains the plants upright by engaging the stalks. The stripped vegetables collect at 11 whence they are elevated at 12 and then fall through an air blast separator 13 into a hopper 15. A vibrating sieve is provided at the top of separator 13. The heads of the stalks are cut off by a fixed or rotating cutter 17 and advanced by a conveyor 61 to a sieve 62 to separate tops of stalks from leaves. The roots are cut from the stalks by a cutter (not shown) near the rear end of the conveyor 5. The tractor may carry a chopper for the stalks which are discharged to the field. The stripping and gripping conveyors may lie in horizontal planes when the apparatus is used solely for stripping.
Patent GB-1245954-A (GB)
Title: Device for the detection of the rotational motion of a shaft
Inventor: WEIR ROBERT JAMES
IPC: G01P3/488
Filed: 1967-12-07
Abstract: 1,245,954. Digital speed measurements. IMPERIAL CHEMICAL INDUSTRIES Ltd. 26 Nov., 1968 [7 Dec., 1967], No. 55766/67. Heading G4H. [Also in Division G1] A device measuring speed of rotation of a shaft 1 includes a magneto-resistor, 6, sited between a magnet 3, and a polepiece 4 so that the passage of either of two diametrally-opposed axial ridges, 2, on the shaft changes the magnitude of the magnetic field coupling the resistor and thereby changes its resistance, the periodicity of which changes being a measure of rotary speed. A second magneto-resistor 7 sited midway between the magnet polepieces provides a temperature-compensating signal when connected with the first in a bridge circuit. Alternatively, two magneto-resistors are sited in similar gaps. Instead of a ridge, a stud or a groove may be used or a plug of a material with different magnetic properties from that of the shaft. The output signals may be counted to give total rotations or shaft overspeed detection may be effected by comparing the time interval between successive intervals with a reference time as disclosed in Specification 1,099,928.
Patent GB-1395460-A (GB)
Title: Pharmaceutically useful phenylalanine derivatives
IPC: C07F3/04
Filed: 1973-12-03
Abstract: 1395460 Dihydroxyphenylalamine derivatives SANKYO CO Ltd 3 Dec 1973 [2 Dec 1972] 55838/73 Heading C2C Novel complexes of L-dopa or methyl dopa with a pharmaceutically acceptable polyvalent metal such as Ca, Co, Fe, Mg, Ni, Zn, Al, Cu or Mn are prepared by action of metal salt with the phenylalamine derivative. Pharmaceutical compositions in conventional forms for oral or parenteral administration having anti-Parkinson activity comprise an above complex and a carrier or diluent.
Patent GB-1469933-A (GB)
Title: Pretanning process
IPC: C14C1/08
Filed: 1973-12-03
Abstract: 1469933 Pre-tanning process AFRICAN TERRITORIES WATTLE INDUSTRIES FUND Ltd 3 March 1975 [3 Dec 1973] 55977/73 Addition to 1394684 Heading C6C Hides or skins are tanned by treating wet limed pelts, in the absence of bulk liquor, with a solid, water-soluble acidic salt, at a pH of not less than 3, and completely tanning the treated pelts with a tanning agent. The acidic salt may be added as such in solid form to the wet limed pelt or it may be formed in situ on the wet limed pelt by treating a non-acidic solid salt applied thereto with an acid. The salt used may be an inorganic sulphate and/or chloride e.g. sodium or magnesium sulphate or sodium chloride. A phosphate salt may be additionally used. The wet limed pelts may be simultaneously treated, in the absence of bulk liquor, with an inorganic sulphate and with a tanning agent. The tanning agent may be a vegetable tanning agent used to provide either a complete tannage or a preliminary tannage prior to a further vegetable tannage or a final chrome tannage.