baber/WOPTO huggingface dataset:
Patent GB-1339622-A (GB)
Title: Electric shutter control circuit for a single-lens reflex camera
IPC: G03B7/083
Filed: 1971-05-28
Abstract: 1339622 Photo-detector circuit ASAHI KOGAKU KOGYO K K 28 May 1971 [16 June 1970] 17948/71 Heading G1A [Also in Division G2] An electric shutter control circuit for a singlelens reflex camera with a through-the-lens photometric system comprises a photo-sensitive element PD, an error detecting resistance R 1 , a transistor Q 2 , an amplifier A, and a memory circuit C M , Q 1 , the error detecting resistance being connected to the photo-sensitive element and the transistor and being so connected during light measurement as to form an automatic control loop through the amplifier and the memory circuit so that the collector current i 3  of the transistor is substantially equal to the current i 1  through the photo-sensitive element and the baseemitter voltage V 2  of the transistor constitutes an output voltage dependent upon received light and is stored in the memory circuit. Amplifier A has a high input resistance and the closed loop automatic control circuit operates so that R 1 i 2 =V 1 =O, where R 1  is the value of the error detecting resistance connected across the input of the amplifier. The photo-sensitive element may be a photo-diode connected so as to be inversely biased between the base and collector of a transistor, Fig.3 (not shown). Resistor R 1  may be replaced by a photo-conductor whose photoresistance characteristic is in inverse proportion to the photo input.
Patent GB-972933-A (GB)
Title: Preparation of thiuramdisulfides
IPC: C07C/
Filed: 1962-05-10
Abstract: Hydrocarbon-substituted thiuramdisulphides are prepared by oxidising an alkali metal salt of a hydrocarbon-substituted dithiocarbamic acid in which the hydrocarbon substitution comprises at least one alkyl or aryl radical. The oxidation is effected by contact with a gas containing free oxygen at a temperature of 15-200 DEG C. in the presence, as catalyst, of an aqueous solution of a sulphonated or carboxylated metal phthalocyanine in which the metal is selected from the metals of Group VIII of the Periodic Table, the pH of the solution being within the range from about 7 to about 12. The pH of the reaction mixture is preferably regulated by adding to the reaction mixture carbon dioxide, acetic acid or a mineral acid. The alkali metal salts of the above-mentioned dithiocarbamic acids can be prepared, for example, by the addition of carbon disulphide to an aqueous solution comprising the appropriate amine and alkali metal hydroxide. Examples are given.
Patent GB-111907-A (GB)
Title: An Improved Process for Purifying Raw Inferior or Scrap Rubbers.
Inventor: RANSFORD ROBERT BOLTON
IPC: C08C3/02
Filed: 1916-12-14
Abstract: 111,907. Ransford, R. B., (Ilcken C. A., and Down, St. V. B.). Dec. 14, 1916. India-rubber, purifying.-Coagulated rubbers, e.g., commercial raw rubber, inferior or dirty, or imperfectly cured rubbers, or scrap rubbers in any form are purified by soaking, preferably for 24 hours or more, in a solution of a salt or salts from which SO2 is liberated or can be liberated by the addition of an acid, but not such salts as also liberate sulphur. Examples of such salts are bisulphates, hydrosulphites, and sulphites. The treated rubber may subsequently be treated with a mixture of methylated spirit and benzine as de. scribed in Specification 8487/15.
Patent GB-1269230-A (GB)
Title: Improvements in and relating to aircraft ejection seats
IPC: A47B96/20
Filed: 1969-04-08
Abstract: 1,269,230. Aircraft ejection seats. STENCEL AERO ENG. CORP. 8 April, 1969 [11 April, 1968], No. 18025/69. Heading B7G. An aircraft ejection seat has a head-rest 70 and locking means 94 maintaining the headrest in its normal position (solid lines) but being releasable to allow the head-rest to pivot rearwardly (broken lines, Fig. 1) of the seat during ejection. Ejection of the seat is caused by pulling a cable 158 passing over a pulley 154 held in a bracket 152. The cable rotates a torque tube 150, to operate cranks 186 and 182, into a first position where it causes an explosive charge 56 to detonate by removing sear 58. The charge fills a header 54 with pressurized gas, whereby inner tubes 50 and outer tubes 52 of a catapult assembly 48 untelescope to begin ejection of the seat from a cockpit. Snubbing lines, Fig. 5, fixed to the cockpit at 180 are attached to a lever 162 pivoted to the seat at 164; thereby initial catapult motion of the seat causes the lever to pivot and pull the cable 158 and then the torque tube 150 into a second position. The second position causes release of the locking means in the form of retractable pins 194 connected to the torque tube by crank 186, Fig. 6 (not shown). The lever 162 may be connected to a boll-crank 202 having a release link or cable 204 by which a lap belt or shoulder restraint mechanism is actuated to lock an occupant in the seat when the seat is being ejected. Orifices 140 provided round the outer tubes 52 come into communication with a conduit 138 as the tubes 50, 52 untelescope and pressurized gas passing therethrough from the header 54 detonates an igniter 136, whereby rockets are actuated to complete ejection. The seat is guided on ejection rails 100. Bearing blocks 122 support the weight of the seat which is further attached to the cockpit at 111. A ballistic charge may be provided to cause the headrest 70 to pivot. Further releasable pins may be provided to separate a face curtain 90 from the head-rest as the torque tube reaches its second position. The seat back 22 and the shelf 28 may be made of a lightweight honeycomb material.
Patent GB-295351-A (GB)
Title: Ionic valve with two anodes and two grids
IPC: H01J21/20
Filed: 1928-06-21
Abstract: 295,351. Etablissements Industriels de E. C. et de A. Grammont. Aug. 10, 1927, [Convention date]. Addition to 288,965. Vacuum tubes.-The two - grid, two - anode valves of the parent Specification are provided with two cylindrical anodes 4, 5 of different diameters so that the filament-plate circuits have different characteristics when connected to a single battery. A space-charge grid 6 or additional control electrode may be provided between the larger anode 5 and the grid 3. The valve may be used in superheterodyne circuits.
Patent GB-980893-A (GB)
Title: Process for preparing spherical, crack-free alumina or alumina-silica gels
IPC: B01J20/10
Filed: 1961-05-17
Abstract: Spherical, crack-free alumina or alumina-silica gels are made by passing an aqueous colloidial solution of basic aluminium sulphate, or a mixture thereof with a silica sol of pH 1 to 3, the per cent of silica in said mixture being less than 55% based on the combined weights of silica and alumina, through a water-immiscible inert organic liquid at 40 DEG  to 100 DEG  C. to form said colloid into spherical hydrogels, washing said hydrogels in water, at preferably 30 DEG  to 95 DEG  C. before syneresis occurs, to remove sulphate ions or aluminium sulphate, washing away the remainder of the sulphate ions as soluble sulphate ions while the pH is raised slowly, e.g. by treatment with ammonium acetate, or hexamine and washing with ammonia water, the rate of increase of pH being slow enough to prevent crack formation, drying said spherical hydrogels and optionally calcining at 350 DEG  to 650 DEG  C. The colloidial solution is preferably vacuum degassed immediately prior to passage through the organic liquid.  The washing procedure can include a sodium hydrosulphite wash followed by water to remove iron salts, use of a phosphate free buffer of pH 5 to 7.5, e.g. ammonia/ammonium salt.  Drying is preferably performed in the presenc of saturated steam.  Organic liquids specified include kerosene, gas or spindle oils, di- or trichlorobenzene alone or diluted with hydrocarbons.  In the examples basic aluminium sulphate is made by adding powdered limestone to a stirred saturated solution of aluminium sulphate. A comparison of properties of a commercial product is included in the examples.  The products have the usual applications as catalysts, catalyst carriers, dehydrating agents.
Patent GB-636228-A (GB)
Title: Improvements in tractors
IPC: B62D55/084
Filed: 1947-07-08
Abstract: 636,228. Changing wheel gauge; adjusting height of body from ground. PONCET, M. V. July 8, 1947, No. 18050. Convention date, July 9, 1946. [Class 108 (ii)] [Also in Group XXXI] The track of a wheeled or endless track agricultural tractor (see Group XXXI), is varied by mounting the endless track sprockets 13, Fig. 1 and 2, or road wheels, on a pair of side frames 2 which are supported by members 3 of U-shaped cross-section slidable in a chassis 1. Adjustment is effected by mounting in each end of the chassis a rotatable hollow shaft 4, Fig. 6, having an internal thread coacting with a threaded spindle 5 fixed to one of the frames 2, and an oppositelythreaded sleeve 6 fixed to the other frame 2. The shafts 4 are rotated by the manual operation of a handle 11, Fig. 4, driving a shaft 9, bevelgears 10, shafts 8, bevel-wheels 8a and bevelwheels 7 which are integral with the shafts 4. In order that the endless tracks 12, Fig. 1, or road wheels, may be adjusted for height with respect to the chassis, the endless track sprockets 13 are rotatably mounted on arms 14 pivoted on the frames 2, said arms having sectors 15. The two sectors 15 on one side can be turned simultaneously by cables 16, Fig. 4, which pass over a common sheave 17 and which are wound on a drum 18 so that the track sprockets on one of the frames 2 can be raised or lowered whilst those on the other side are moved in the opposite direction. The drums 18 are driven from an engine shaft extension 30a on which is fixed a pinion 45 in constant mesh with pinions 46, 47, which pinions drive shafts 48, 49, oppositely cut worms 50, 51, and pinions 52, 53, which are loose on a shaft 20, respectively. The loose pinions 52, 53, each having dogs projecting from their opposing faces, can drive the shaft 20 in either direction according as to which dogs are engaged with a dog clutch 54 which is slidable on the shaft 20 and rotatable therewith. Worms 21 at each end of the shaft 20 drive worm-wheels on shafts 19 of the drums 18.
Patent GB-887602-A (GB)
Title: Improved mobile laundry installation
Inventor: SCHRODER HANS JOACHIM
IPC: D06F95/00
Filed: 1959-05-27
Abstract: 887,602. Washing-machines. TAPPER, H. May 27, 1959, No. 18123/59. Class 138 (2). [Also in Groups XIII and XXXII] A mobile laundry installation comprises two single-axle trailers, the first trailer (Fig. 1) carrying a water heater and steam generator 2, a double-drum washing machine 4, a spin drier 15 and a water pump 22, and the second trailer (Fig. 3) carrying an electric generator 32, a rotary drum drying machine 25 and a drum 35 for hosepipes and cables. The pump 22 driven by an electric motor 23 can be removed from the trailer and set up adjacent a supply of water. A protective tarpaulin cover can be stretched over a collapsible tubular frame on the trailers. The drive to the washing machine drum is from a reversible electric motor 9 through a resilient coupling 10 and worm drive 8.
Patent GB-1317732-A (GB)
Title: Electroluminescent devices
IPC: C09K11/77
Filed: 1970-04-16
Abstract: 1317732 Electroluminescence WESTERN ELECTRIC CO Inc 16 April 1970 [16 April 1969] 18162/70 Heading C4S An electroluminescent device producing visible radiation includes an infra-red emitting PN diode with a phosphor coating 8 comprising a composition including and oxyhalide and/or fluorohalide containing #5% Yb<SP>3+</SP>, in which phosphor either at least 2 anion sites per unit cell are differently populated in at least 1% of the unit cells of the phosphor or there is at least one anion vacancy in at least 1% of the unit cells, the phosphor further containing at least one of 1/16 to 20% Er<SP>3+</SP>, 1/50 to 5% Ho<SP>3+</SP> and 1/16 to 5% Tm<SP>3+</SP>, e.g. #% Er<SP>3+</SP>, #2% Er<SP>3+</SP>, # 2% Ho<SP>3+</SP>, #10% Yb<SP>3+</SP>. Prior art red or green emitting GaP diodes and infra-red Si: GaAs diodes are discussed, the latter with lanthanum fluoride : Yb, Er. Many specific phosphor compositions are instanced, wavelengths, internal excitation and emission mechanisms discussed, Fig. 2 (not shown), indicating particular excitations and emissions. Anisotropics in the crystals produce field splitting for the Yb<SP>3+</SP> absorption spectra. Blue, red and green emissions are exemplified, YOCI and Y 3 OCl 7  appearing red or green respectively for example. Inactive cations such as Y, La, Lu or Gd may be included and additional ingredients to improve adhesion to the substrate and/or reduce light scattering (e.g. collodion) where the coating 8 is particulate and to encapsulate from a harmful environment. The inert material may have a refractive index approaching or exceeding that of the powder or polycrystalline phosphor (e.g. 2 to 3À5). Oxyhalides and lead or alkaline earth fluorochlorides or -bromides may be prepared as in patent Specification 1,317,731, the fluorides being 1 optionally melted with oxyhalides which may be of rare earths for example, discussions for varying O to halide ratios being also as disclosed therein. Preferably ion pairs are Yb<SP>3</SP><SP>+</SP>-Er<SP>3</SP><SP>+</SP>, Yb<SP>3</SP><SP>+</SP>-Ho<SP>3</SP><SP>+</SP>, mixtures thereof, or Yb<SP>3+</SP>-Tm<SP>3+</SP>, 80% or Yb<SP>3+</SP> being a preferred maximum. Additional inert cations may indude Y, Pb<SP>2+</SP>, Gd<SP>3+</SP>, Na<SP>1+</SP>, purity generally be three or five nines. Preparations of specific phosphors are given in the examples, many specific phosphors being given, including mixtures, and alkali components individually instanced for example. Computer and communication applications are instanced.
Patent GB-1357231-A (GB)
Title: Test apparatus for use in testing a liquid
IPC: G01N33/483
Filed: 1971-06-22
Abstract: 1357231 Centrifugal analysis; reagent pack; centrifugal separators BIO-DYNAMICS Inc 1 June 1971 [22 June 1970 27 Jan 1971] 18284/71 Heading B2P [Also in Division G1] Test apparatus comprises a container which may be in the form of a detachable pipette tip 55, (Fig. 14), a cap 62 to close the container, a housing for the container and cap and a centrifuge for centrifuging the housing containing the container and cap, the centrifuge being rotatable at two different speeds, and the cap being fitted on to the container in such a way that it can be detached from the container on centrifugation at the higer of these two speeds. In the embodiment shown, the housing comprises cuvette cassette 35 (Fig. 3) which comprises four cuvettes 36 initially sealed by tear strip 39 and provided with a data card. Each cuvette comprises an inner chassis (105, Fig. 18 not shown) having an opening (110) at one end for receiving a capped pipette tip containing a sample to be analysed, and an opening (115) at the other end to allow passage of the sample when centrifugal force forces the cap away from the pipette tip. The cuvette (Fig. 14) has a flattened end portion formed with two inner compartments 105A, 106 for sample and reference liquids. In the assembled cuvette, reagent and reference liquids contained in a series of connected bags 200, 201 are positioned around the chassis so that when on centrifugation the lower edge of each of the bags breaks open, reagent and reference liquids pass into compartments 105A, 106 respectively as shown in Fig. 14. There is reference to testing samples of blood and of water.
Patent GB-1513544-A (GB)
Title: Ceramic structure for catalyst support
IPC: B01J35/02
Filed: 1977-05-02
Abstract: 1513544 Ceramic catalyst support CERAVER 2 May 1977 [7 May 1976] 18315/77 Heading C1J A ceramic support structure for a catalyst (in particular for reforming hydrocarbons) has a tubular shape with radical internal partitions whose angular spacing is regular, wherein the number of internal radial partitions is five (see Fig. 2) or seven. The ceramic may be alumina or magnesia and typically its outside diameter lies between 12 and 26 mm, its inside diameter lies between 8 and 24 mm, the thickness of its external partitions lies between 1 and 2 mm and its length is substantially equal to its outside diameter.
Patent GB-1460617-A (GB)
Title: Machine for making a compartmented suppository container
IPC: B65B9/04
Filed: 1974-04-26
Abstract: 1460617 Making compartmented containers, corrugating drive, welding by pressure FARMOGRAFICA SpA 26 April 1974 [4 May 1973] 18318/74 Heading B3A A machine for making a compartmented suppository container from two aluminium strips 2, 2<SP>1</SP>, comprises a support structure, a pair of corrugating rollers 4, 4<SP>1</SP> mounted in the support structure, recess forming means downstream of the rollers and comprising a pair of platens 6, 6<SP>1</SP> movable towards and away from each other. Each platen is formed with a face having a plurality of recesses 7 corresponding to the recesses to be formed in the strips and a planar member is stationarily mounted between the faces of the platens, the planar member having a plurality of enlarged portions 8 respectively aligned with the recesses. The platens are moved between an open or inactive position and a closed or active position by actuation of a piston in a cylinder (13), Fig. 2 (not shown), which shortens or extends toggles 10, 10<SP>1</SP>, via a crosshead (12), connecting rods (11<SP>1</SP>) and pivot pins 11. In the active position of the platens, compartments of the container are shaped in the strips 2, 2<SP>1</SP> and grippers 14 engage the superimposed edges of the strips to advance the shaped strips to welding means comprised of heated platens 16, 16<SP>1</SP>. The platens 16, 161 are formed and actuated similarly to the platens 6, 6<SP>1</SP>.
Patent GB-184025-A (GB)
Title: Improved method of, and apparatus for, measuring the calorific value of gas
IPC: G01N21/72
Filed: 1921-07-06
Abstract: 184,025. Withers, J. S., (Lanphier, E. R.). July 6, 1921. Testing heating and illuminating gases.-The calorific, value of gas is measured by supplying a gas of known calorific value to a Bunsen burner, adjusting the burner until a non-luminous flame is obtained, substituting the gas to be tested, adjusting the burner again to obtain a non- luminous flame and noting the difference between the two adjustments. The burner tube 6 having an air aperture 9 is screwed into a base 1 and has screwed on to it and controlling the air aperture a sleeve 22 the adjustment of which is registered by a micrometer scale 25 and graduations 24 on the tube 6. An air chamber 3 having ports 4 surrounds the lower part of the burner tube 6 and shields the air inlet 9 from draughts. A plug 10 having a bore 11 terminating in an orifice is screwed into the base 1 and tube 6 and serves to assist in calibrating the burner, the gas supplied by a pipe 13 being controlled by a needle valve 16. The burner is calibrated by using a standard gas and adjusting the sleeve 22, plug 10 and needle valve 16 until a non- luminous flame is obtained, the adjustment of the sleeve 22 to obtain a similar result for the gas under test gives a direct value of the gas in British thermal units.
Patent GB-296853-A (GB)
Title: Improvements in or relating to high frequency electrical apparatus
IPC: H04B15/04
Filed: 1927-07-11
Abstract: 296,853. Brown, W. J., and Metropolitan-Vickers Electrical Co., Ltd. July 11, 1927. Thermionic generators.-In apparatus for producing or utilizing oscillations of very high frequency such as described in Specifications 268,028, 268,029, 274,183, 287,663 and 291,619, a conductor connecting two points spaced apart is such that its electrical length is at least a plurality of wavelengths of the frequency of the apparatus. Such a conductor serves to connect batteries or telephones and preferably has a. low attenuation per unit length at low or zero frequencies. The conductor may comprise a closely wound helix of small diameter which may be wound upon, embedded in or contained within a tube of insulating material having high di-electric losses. Alternatively, the conductor may comprise a helix provided with an insulated iron core or a length of wire enclosed within but insulated from a continuous sheath or helix of iron.
Patent GB-220304-A (GB)
Title: Manufacture of condensation products of the anthraquinone series
IPC: C09B3/06
Filed: 1924-08-01
Abstract: The dibenzopyrenequinones described in the parent Specification are prepared by condensing Bz-1-aroyl-peri-benzanthrones by means of aluminium chloride at a high temperature.  In an example Bz-1-benzoyl-peribenzanthrone is heated with aluminium chloride for two days at 180 DEG  C.  Bz-1-aroyl-peri-benzanthrones are prepared from the corresponding Bz-1-nitro-compound by reducing, replacing NH2 by CN, hydrolyzing to the carboxylic acid, and condensing the chloride of the acid with an aromatic hydrocarbon in presence of aluminium chloride; in an example the acid chloride is stirred with excess of benzene and aluminium chloride on the water bath to form the Bz-1-benzoyl-peri-benzanthrone.  Specification 12518/06 is referred to.
Patent GB-516361-A (GB)
Title: Improvements in or relating to lighting fittings
IPC: F21V7/04
Filed: 1938-06-21
Abstract: 516,361. Street &c. lamps. BRITISH THOMSON-HOUSTON CO., LTD., and MAXTED, R. June 21, 1938, No. 18448. [Class 75 (ii)] A street lighting fitting comprises a parabolic reflector 2, a light source 1 at the focus thereof and a pair of translucent reflectors 3 forming an inverted V beneath the source and reflecting light diffusely preferably at a mean angle of 10 degrees to the. horizontal and transmitting diffuse light below. Preferably the source and reflectors are elongated and the panels 4 diffusing.
Patent GB-939412-A (GB)
Title: Improvements relating to pressure pipe fittings
IPC: F16L41/02
Filed: 1960-05-25
Abstract: 939,412. Pipe couplings. MONSANTO CHEMICAL CO. May 25, 1960 [May 25, 1959], No. 18491/60. Class 99(1). A fatigue-resisting pressure pipe fitting comprises a solid pressure-isolating block 10 having disposed therein at least one intercommunicating fluid passage 11 the ends 15 of which open radially and/or axially upon the periphery thereof, a continuous external jacket 17 surrounding and in contact with the whole of the periphery of the block, passages 20 through the jacket aligned with each of the openings and means 23 mounted within each passage for securing fluid-tight connections from a fluidconveying line to the block. As shown, the block, e.g. of steel ceramic or synthetic resin has a flattened portion 39 engaged by a screw 38 to align the passages in the block and jacket, and the fittings 21, 22 and 23 which are screwed into the jacket incorporate adapters 28 provided with conical portions 31 co-operating with similarly shaped seatings in the block. The fittings may incorporate ball check valves 33. In a modification, fluid sealing between the fittings and the block is effected by steel coned rings 27.
Patent GB-581635-A (GB)
Title: Improvements in or relating to the manufacture of chloral
IPC: C07C45/51
Filed: 1944-09-28
Abstract: Chloral is prepared by continuously adding chloral alcoholate to strong sulphuric acid at a temperature above the boiling point of chloral and condensing the choral vapours formed.  In the example, chloral is supplied to sulphuric acid (S.G. 1.6) at a temperature of about 115 DEG  C., the acid strength being maintained by the addition of concentrated sulphuric acid.