baber/WOPTO huggingface dataset:
Patent GB-1019540-A (GB)
Title: A method and apparatus for determining the difference in area of an article from an article of known area
Inventor: VINCE REGINALD THOMAS
IPC: B21D37/20
Filed: 1964-07-24
Abstract: 1,019,540. Photo-electric area determination. ROLLS-ROYCE Ltd. July 24, 1964, No. 29779/64. Heading G1A. In order to determine the difference in projected area between an article and a reference standard light is projected through an aperture with which the article is aligned and the intensity of the light beam beyond the article measured and compared with the intensity occuring when the reference standard replaces the article under test. As shown the test apparatus comprises a box 10, in which is mounted a lamp 12 from which light is directed by lens system 13, 14 through an aperture 19 in a screen 15 on to a photo-cell 16. The output of the photo-cell is displayed on a meter 17 on the front of the box. To calibrate the apparatus a reference article such as a standard turbine blade is supported, as at 20, substantially in the plane of the aperture 19 and the meter adjusted to read zero, for example by means of a potentiometer in the circuit. Replacement of the reference blade by a blade to be tested, e.g. a reconditioned blade, produces a meter indication related to the difference in projected areas. In a modification the screen 15 is positioned between the lenses 13 and 14.
Patent GB-1223676-A (GB)
Title: Improvements in or relating to static inverters
Inventor: SHEPHARD ROBERT
IPC: H02M7/48
Filed: 1967-06-28
Abstract: 1,223,676. Static inverters. PLESSEY CO. Ltd. 17 June, 1968 [28 June, 1967], No. 29807/67. Heading H2F. In an inverter having a filter output circuit to convert the inverter time spaced square waveform output to sine wave form and comprising series-parallel tuned circuits including C1, C2 (Fig. I), and saturable inductors 3, 4, at least part of the ringing energy produced in the filter is caused to be recirculated in the load by turning ON an SCR9 or SCR10 to shunt the inverter output transformer secondary 8 between successive time spaced pulses fed to the transformer from the inverter pulse generating means (not shown). SCR's 9, 10 are triggered alternately at the end of respective positive and negative pulses of the inverter waveform by trigger means operated in synchronism with the lagging edge 13 (Fig. 2) of the said pulses. Thus energy which would otherwise be recirculated in the inverter and fed back to the D.C. source at the end of each pulse is short-cricuited through SCR 9 or 10 and dissipated in the load. The lagging edge 13 would normally go negative into shaded portion 11 as the filter rings, but the conducting SCR causes the pulse to decay instantaneously to zero, only rising to produce spike 15 as the filter rings positively. The spike 15 cuts-off the conducting SCR. Likewise spike 16 cuts off the other SCR following the end of the next successive pulse. In Fig. 3 (not shown), instead of the SCR's 9 and 10 there is a diode bridge rectifier across the secondary, with a controlled transistor switch across its output diagonal. The arrangement is said to reduce sine wave output distortion from the filter.
Patent GB-396247-A (GB)
Title: Improvements in or relating to anti-skid horse-shoes, and the like
IPC: A01L1/04
Filed: 1932-10-25
Abstract: 396,247. Horseshoes. ALBISSON, L., 10, Place de l'Horloge, Carpentras, France. Oct. 25, 1932, No. 29830. [Class 67.] The shoe comprises a metal frame of channel section which diminishes in height towards the heels and which receives a tread of rubber or like material, the whole being secured to the hoof by nails passing through holes in the frame and the tread. The tread 4 may be permanently secured to the frame 1 by protrusion through holes 3, Figs. 1 and 7, or by dovetailing of the channels, as in Fig. 4. The nail-holes may be formed with bosses 8, Fig. 4. The frame is thickened at the front edge, and may be cut away at the inner edge 12. When the tread is detachable, the ends 14, Fig. 10, of the channel are dovetailed to hold the tread, which may be further secured at the toe by an inward projection 17, Fig. 11, of the frame, or by protrusion of the tread through a hole 20, Fig. 13, in the frame.
Patent GB-633620-A (GB)
Title: Improvements in or relating to systems of transmitting signals by means of electro-magnetic waves
IPC: H04J3/00
Filed: 1945-11-09
Abstract: 633,620. Multiplex pulse signalling; radiolocation. PATELHOLD PATENTVERWERTUNGS- & ELEKTROHOLDING AKT.-GES. Nov. 9, 1945, No. 29896. Convention date, Nov. 13, 1944. [Classes 40 (v) and 40 (vii)] In a super-regenerative radio receiver for receiving one channel of an interlaced channel pulse multiplex system, the quench frequency being integrally related to the transmitter pulse train recurrence frequency, a switching device controls the back coupling periodically in such a manner that in the non-back-coupled phase the back coupling is completely cut off. As shown, the receiver oscillatory circuit K feeds the amplifier and demodulator R, the amplified H.F. signal being fed back to circuit K through a switching device U controlled by the quench generator P. The latter is synchronized to the channel pulse recurrence frequency by a pulse output from circuit R. The phase of generator P may be adjusted so that the incoming pulse coincides with the beginning of the build-up period of the oscillatory circuit. The output of the oscillatory circuit may be fed to the demodulator through a valve which is also controlled by the quench generator in such phase as to pass the signal at the end of the build-up period. The invention is applicable to pulses of frequency and phase-modulated radio frequency. Specification 585,613 is referred to. The Specification as open to inspection under Sect. 91 comprises' also an arrangement in which all the channel pulses are received by a single super-regenerative receiver and subsequently separated. The arrangement may also be used at a relay station, interference between the received and retransmitted pulses being avoided by a retardation element, a change of radio frequency or by a suitable disposition of aerials. When used in a radar system, the quench frequency may be obtained from the transmitter pulse recurrence frequency and its phase adjusted to give maximum sensitivity. This phase adjuster gives a rough indication of pulse transit time, but a further phase comparator is provided for accurate measurements. This subject-matter does not appear in the Specification as accepted.
Patent GB-930735-A (GB)
Title: Improvements in or relating to protective goggles
Inventor: MCCABE VICTOR GEORGE
IPC: A61F9/02
Filed: 1960-08-30
Abstract: 930,735. Goggles. PARMELEE (G.B.) Ltd. Nov. 14, 1961 [Aug 30, 1960], No. 29901/60. Class 97 (1). Protective goggles comprise a frame and a transparent shield attached to and spaced in front of the frame to provide protection for the eyes of the wearer and providing ventilation for the rear surface of the shield. In the goggles shown two eye pieces 14, 15 either or both of which may be coloured are removably attached to the frame 10 by means of bolts 20 fixed to brackets 16 on the frame; parts of the eyepieces being slotted to engage the bolts. The eyepieces are spaced from each other and the frame by means of spacing rings 22 and plugs 23. Transparent guards 26 shade ventilation holes in the frame. The distances between the eyepieces and the frames may be varied by having rings 22 of different thicknesses or by making the brackets 16 slidable on the frame.
Patent GB-164043-A (GB)
Title: Improvements in fountain pens
IPC: B43K5/18
Filed: 1919-12-01
Abstract: 164,043. Hayes, J. E. Dec. 1, 1919. Pens; reservoir pens. - A pen nib of the type having a flat shank and a curved split point has the whole of the shank a flat and resilient, so that the shank yields when the curved split joint b has spread to a certain limit, thus ensuring a uniform width of line. The nib is particularly adapted for use in fountain pens, in which case the yielding of the shank a may be limited by the feed-bar 4 at the back of the nib, as shown in Fig. 6. Specification 19544/97 is referred to.
Patent GB-980974-A (GB)
Title: Treatment of woollen or worsted fabrics
Inventor: EVANS JOHN GWYNANT
IPC: D06M11/05
Filed: 1962-08-03
Abstract: Woollen or worsted fabrics are rendered stretchable in the length-wise or warp-wise direction and their resistance to relaxation shinkage is improved by treating them with a chemical agent capable of causing the disulphide bonds in the wool molecule to break, e.g. sodium bisulphite, monoethanol amine sesquin sulphite, ammonium thioglycollate, sodium, metabisulphite or sodium carbanate, compressively shrinking them and subjecting them to the action of steam while they are in the shrunk state to set them in a shrunk state.  The steaming is carried out with the fabrics constrained or prevented from returning to their original dimensions.  The fabrics are preferably impregnated with the chemical agent before compressive shrinking in which case the setting may be at least initiated during passage of the impregnated fabrics through a compressive shrinking machine if they are damp at this stage, e.g. have a moisture content of 40%, and the temperature at which shrinking takes place is high enough. Alternatively the fabrics may be treated with the chemical agent after they have been compressively shrunk and maintained in the shrunk state while being treated and subjected to the action of steam.  The compressive shrinking may be effected by contacting the fabric with a metal surface heated to a temperature of 90 DEG -150 DEG C.  The steaming may be carried out in a blowing machine comprising a perforated rotary drum round which the fabric is wrapped and to the interior of which steam is supplied.  The resistance to felting of the fabric may be improved by first subjecting it to an oxidation or chlorination treatment, e.g. in potassium permanganate, permonosulphuric acid or sodium hypochlorite, or to treatment with condensation resins, e.g. polyamides, polyesters, including polycarbamates, or polyurethanes, by interfacial polymerization. Specifications 529,579 and 658,977 are referred to.
Patent GB-681442-A (GB)
Title: Improvements in or relating to hoists, cranes or the like
IPC: B66D3/24
Filed: 1949-11-23
Abstract: 681,442. End stop-gears. KING, D. M. Nov. 8, 1950. [Nov. 23, 1949] No. 30051/49. Class 78 (v). The switch controlling the driving motor of a hoist is actuated at the end of the run by a striker plate 22 fixed on the hoisting chain 10 coming into contact with a ring 21 mounted on the lower end of a spring 20 which is suspended from a pair of pivoted arms 16 linked to the operating arm 14 of the switch. The chain passes freely through the spring which preferably is enclosed within a cover 23 of canvas or rubber. A stop 25 limits the downward movement of the arms 16.
Patent GB-259416-A (GB)
Title: Improvements relating to piston or gland packings for grease guns and the like
IPC: F16J15/18
Filed: 1925-11-28
Abstract: 259,416. Benton & Stone, Ltd., and Milner, C. E. Nov. 28, 1925. Piston and like apparatus for discharging receptacles.-In a grease gun or the like of the type in which the grease is expelled from a cylinder a through a passage n in the rod b of a plunger i, which is pressed into the cylinder, the hat leather or other packing c is supplemented by a piston g loose on the rod b and having a cup-leather packing h. The piston g provides a long bearing for the rod b and leakage collects in a space k. It is stated that the leakage returns to the cylinder a, when the cylinder is refilled with grease by means of a cylinder with a screw-down piston forming a continuation of the cylinder a
Patent GB-391495-A (GB)
Title: Improvements in or relating to the production of mono-calcuim phosphate and di-calcium phosphate
IPC: C05B11/06
Filed: 1931-10-30
Abstract: Dicalcium phosphate, and optionally monocalcium phosphate, are obtained by extracting tricalcium phosphate with sufficient nitric acid to produce a phosphoric acid concentration in the mixture such that monocalcium phosphate is capable of existing therein in the solid phase, partially neutralizing the resulting solution, which may contain solid monocalcium phosphate, by adding di- or tricalcium phosphate or both, and treating the magma thus produced with ammonia so as to precipitate successively mono- and dicalcium phosphate, the separation of the former being optional, but being effected, if at all, when the concentration of the mother liquor is just above the equilibrium point between the two solid phases, mono- and dicalcium phosphate.  A preferred temperature range of 30-75 DEG  C. is specified.  The use of a 40 per cent or stronger nitric acid is desirable, and in such case, the magma or mother liquor is diluted before precipitation of dicalcium phosphate with water, or preferably with the calcium nitrate-ammonium nitrate or ammonium nitrate solution obtained in the process.  The ammonia may be added dissolved in this diluting liquor, or be diluted with an inert gas, the mixture being forced into the air-filled space above the level of the liquid contained in an agitated closed vessel, or be passed in small bubbles through the liquor. Preferably when the ammoniation is half completed, sodium silicate may be added.  The raw phosphate should be added to the acid, and when the solution is nearly saturated with monocalcium phosphate, gangue may be filtered off, and the remainder of the phosphate then added.  Dicalcium phosphate separated in the last stage of the process may be returned for use in the initial partial neutralization of the acid solution; the ammonium nitrate-calcium nitrate mother liquor obtained on separation of the dicalcium phosphate may be treated with ammonia and carbon dioxide, or ammonium carbonate, bicarbonate or carbamate.  The resulting ammonium nitrate solution is concentrated, and may then be admixed with the calcium carbonate produced, and granulated, for example by stirring or spraying.  In the Specification as open to inspection under Sect. 91 the initial partial neutralization of the acid solution with di- or tricalcium phosphate or both is not essential.
Patent GB-1179298-A (GB)
Title: Detonating Fuses for Bombs or the like.
IPC: F42C15/31
Filed: 1967-06-29
Abstract: 1,179,298. Projectile fuzes. FORGES DE ZEEBRUGGE S.A. 29 June, 1967 [28 Oct., 1966], No. 30133/67. Heading F3A. Fuze for a bomb, comprises a detonator (not shown) carried in a pivotable carrier 14, a first locking element 13 which engages the carrier in a safety position but is displaced a predetermined time after release of the bomb, and a second locking element 26 which engages the carrier in the safety position but is displaced after impact of the bomb by the glass resulting from the combustion of a delay charge 39, the carrier then being swung by a spring into a position where combustion of the remaining part of the delay charge causes firing of the detonator. The first locking element is held against axial rotation by engagement with a pin but is displaced axially by a spring when a recess in the end face 11 of a rotatable striker guide 8 is aligned with the locking element, following shearing of a pin 19 which extends into a circumferential recess in the end face. The guide 8 is rotated by a striker 4 driven through reduction gearing 3. A spring loaded pin locks the first locking element in the inactive position. The striker is formed with an inertia mass 5 and is thrown against a primer 40 upon impact of the bomb. The second locking element is displaced by combustion gases fed into a chamber 29, and is held in the inactive position by engagement of its head 31 in a capsule 33.
Patent GB-351359-A (GB)
Title: Improvements in or relating to the production of primary alcohols
IPC: C07C29/147
Filed: 1930-10-08
Abstract: Primary alcohols are produced by reducing esters of the corresponding acids by the action of sodium and lower alcohols under excess pressure of hydrogen.  Instead of the alkyl esters of the process of the parent Specification, esters with divalent or polyvalent alcohols are used.  By this use of excess pressure, the saponification which occurs when glycerides are treated with sodium and alcohol under normal pressure is entirely checked.  A mixture of triglycerides, such as a natural fat, may be converted directly into a mixture of the corresponding alcohols.  The required pressure of hydrogen may be produced by using the corresponding excess of alkali metal, or by forcing hydrogen into the reaction vessel.  The reaction may also be promoted by employing the alkali metal in a finely divided state, and moderate quantities of carbon dioxide may be forced into the reaction vessel in order to prevent saponification of the ester.  An example is given of the reduction of coco nut oil with n-butyl alcohol and sodium, the hydrogen pressure being 5-15 atmospheres.
Patent GB-1353067-A (GB)
Title: Process for recovery of valuable materials from solid wastes
IPC: B03B9/06
Filed: 1971-06-28
Abstract: 1353067 Treating waste material OCCIDENTAL PETROLEUM CORP 28 June 1971 [8 July 1970] 30216/71 Heading C1K Valuable materials are recovered from waste by comminuting in mill 10 and bringing the product in contact with a hot gas stream, wherein the paper stock present is elutinated and passes into chamber 12 and thence to pulping tank 14 from whence it can be further purified and dewatered to give paper pulp. The solids not lifted by the gas stream are comminuted again at 24 and fed to a gravity separator 26 and elutinator clarifyer 28 which separate a organic fraction and a heavier metals-inorganic fraction. The former passes to another pulping tank 18 where pulp not already removed is taken off and cycloned and strained at 32. Organic material other than pulp is dewatered at 34 and pyrolysed in furnace 36 with coal at 800-1800‹ F. to yield a gas rich in hydrocarbons which is further treated, and a char which is devolatilized at 1200-2000‹ F. to produce a hydrogen rich gas stream. The metals-inorganic fraction after leaving 28 is screened and the ferous metals therein removed by a magnetic separator 40. The rest passes to a heavy medium slurry separator 42 where inorganics and light metals, e.g. Mg, Al collect at the top and heavier metals sink. The top material is crushed and screened at 44, 46 to separate sand, dirt, &c. from glass and from metal. The sink material is similarly processed to separate metals of differing density and treated further. Copper, nickel, cobalt and zinc are leached out with ammonia, the copper removed by electrolysis and the other metals precipitated out as carbonates with carbon dioxide. The metals-inorganic fraction can also be passed over a grease table to catch diamonds, and jigged to separate coins. Separated glass can be further separated into glasses containing ferrous ingredients and those with none by passing it though a high intensity magnetic separator.
Patent GB-265724-A (GB)
Title: Improvements in and relating to machines for polishing bottles, cans, jars and similar cylindrical containers
IPC: B24B19/00
Filed: 1925-12-01
Abstract: 265,724. Nixon, C. R., Swindell, W. B., and Dunnock, J. L. Dec. 1, 1925. Bottles, cans, jars, and cylindrical articles, cleaning.-Apparatus for polishing bottles, cans, jars, and similar cylindrical containers, comprises a drum 20 formed of discs of fibrous material and dipping into a tray 24 containing abrasive material. The bottles, &c. are carried in racks 45 one of which is being loaded or unloaded whilst the other is vertically reciprocated across the cylindrical surface of the drum. The racks are carried by arms 44 secured to gear wheels 47, 48 rotatably mounted in brackets 40 on a frame 36. The frame 36 which includes side bars 30 is guided during reciprocation through apertures in lugs 29 secured to bars 28 which are spring pressed towards the drum so that an adjustable pressure may be exerted between the bottle, &c. and the drum. Means 52 are provided to limit the inward movement of the bars 28. The racks are swung into and out of operative position by manipulation of a handle 49 secured to one of the gear wheels 47.
Patent GB-1522716-A (GB)
Title: Avoidance of depositions from liquids
IPC: F28F19/00
Filed: 1976-07-21
Abstract: 1522716 Preventing deposition of solids from liquids in heat exchanger SAINT-GOBAIN TECHNIQUES NOUVELLES 21 July 1976 [21 July 1975] 30363/76 Heading C7E [Also in Division F4] The deposition of solids from a liquid contained in a vessel such as a heat exchanger, is prevented by connecting two conductive parts of the vessel which are insulated from each other to the opposite poles of a D.C. source and reversing the polarity at intervals. The ratio between the maximum and minimum distances separating the parts is #3, the current density # 0À5 A/dm<SP>2</SP>, voltage < 3V, and the intervals between polarity reversal # 10 minutes. The vessel may be a heat exchanger with parallel plates, two pipes one within the other and insulated from each other or at least two mutually insulated coils mounted about the same longitudinal axis.
Patent GB-1044612-A (GB)
Title: Method of making thermoluminescent material
IPC: C09K11/61
Filed: 1963-07-31
Abstract: A thermoluminescent manganese-activated calcium fluoride is prepared by reacting a wet slurry of CaCO3 and 4-6 w/o MnCO3 with conc. HF to precipitate a mixture of CaF2 and MnF2, washing and drying the precipitate, and then heating the powdered mixture in a dry rare-gas atmosphere at 120 DEG  C. for 30 minutes and cooling in the rare-gas atmosphere.  The material may be used as an integrating dosimeter.ALSO:A thermoluminescent manganese-activated calcium fluoride is prepared by reacting a wet slurry of CaCO3 and 4-6 w./o. MnCO3 with conc. HF to precipitate a mixture of CaF2 and MnF2, washing and drying the precipitate, and then heating the powdered mixture in a dry rare-gas atmosphere at 120 DEG  C. for 30 minutes and cooling in the rare-gas atmosphere.  The material may be used as an integrating dosimeter.
Patent GB-866762-A (GB)
Title: Improvements in the production of 2,5-diarylamino-3,6-dihydroterephthalic acid esters
Inventor: DEUSCHEL WERNER
IPC: C09B48/00
Filed: 1959-09-08
Abstract: In a process for the production of esters of 2,5-diarylamino - 3,6-dihydroterephthalic acid wherein an ester of succinic acid is treated with an alkali metal alcoholate to give an alkali metal salt of an ester of succinylosuccinic acid, which is acidified to form the free ester and condensed with the appropriate arylamino compound, the first stage of the process is carried out in a solvent comprising a dialkylamide of a carboxylic acid such as dimethylformamide or diethylacetamide, or a N-alkyl lactam such as N-methyl-pyrrolidone, or N-methylpiperidone.  The subsequent stages of the process may be carried out in the same solvent as the first stage.  The product of the process may be converted into the corresponding 2,5-diarylamino-terephthalic acid by dehydrogenation and saponification.  In example 1, a suspension of sodium methylate in N-methyl-pyrrolidone is stirred into diethyl succinate, and the mixture is heated at 110 DEG C. for about 8 hours in an atmosphere of nitrogen.  A mixture of aniline and aniline-hydrochloride is then added, and the mixture is maintained at 120 DEG C. for 1 1/2 hours. Water is then added in small portions whereupon crystals of the diethyl ester of 2,5-dianilino-3,6-dihydroterephthalic acid are precipitated.  This ester can be converted, without separating it from the pyrrolidone solution, into 2,5-dianilinoterephthalic acid by heating the solution with an aqueous alkaline solution of the sodium salt of meta-nitrobenzenesulphonic acid.  The mixture is then diluted with water and acidified in order to precipitate the 2,5-dianilinoterephthalic acid.  The following amines may also be condensed with the ester of succinylosuccinic acid:- p-toluidine, o- and p-chloraniline, 2,5-, 2,4, and 3,4-dichloroaniline, p-anisidine, alpha-naphthylamine, and o-, m- and p-aminobenzoic acids. Specifications 742,949 and 751,035 are referred to.