baber/WOPTO huggingface dataset:
Patent GB-145046-A (GB)
Title: Improved process for decolorising liquids containing glycerine or crude glycerine
IPC: C11D19/00
Filed: 1920-06-14
Abstract: The bleaching action referred to in the parent Specification is enhanced by the addition of iron in comminuted form, such as iron powder or filings, before adding the oxalic acid.  The soluble iron compounds formed may be precipitated by agents such as barium carbonate or calcium hydroxide, thus permitting the use of a smaller quantity of oxalic acid.
Patent GB-438733-A (GB)
Title: Improvements in or relating to show stands and display cases
IPC: A47F5/05
Filed: 1934-05-31
Abstract: 438,733. Cabinets or show stands. EDMONDS & CO., Ltd., A., and EDMONDS, A., 91, Constitution Hill, Birmingham. May 31, 1934, No. 16221. [Classes 52 (i) and 52 (v)] A show stand or cabinet for displaying flat articles comprises two triangular or like plates a secured by bosses b to a vertical spindle c shown mounted in bearings d in the floor and roof of a cabinet f with a hinged side p and front n. In each plate a are holes g in which are fitted on trunnions k, a series of panels or leaves f each longer than the one behind it. Each panel may consist of two glazed frames, hinged together.
Patent GB-781998-A (GB)
Title: Process for reducing gaseous heat transfer to the wall of the combustion chamber for a rocket apparatus
IPC: F02K9/42
Filed: 1955-06-06
Abstract: 781,998. Combustion chamber linings. ANSTALT FUR DIE ENTWICKLUNG VON ERFINDUNGEN UND GEWERBLICHEN ANWENDUNGEN ENERGA. June 6. 1955 [June 10, 1954], No. 16234/55. Class 51 (1). The thermic effects of the combustion gases on the combustion chamber wall of a rocket apparatus are reduced by adding to the propelling agent, or to one of its components, a substance which at the time of gasification of the agent forms a solid deposit on the chamber wall. This lining, which when the propelling agent comprises nitric acid and the additive comprises a chromium or nickel salt comprises a precipitate in the form of nitride of chromium or nickel, enables, by its heat-insulating property, a combustion chamber wall construction of relatively inexpensive steel preferably cooled by an external water cooling device. To permit deposition of the nitride precipitate it is necessary in the operation of the rocket combustion apparatus to reduce the temperature of the combustion gases in the vicinity of the chamber wall to below that of the melting point of the chromium or nickel salts. This may be effected by supplying an excess of propelling agent or one of its components.
Patent GB-1424433-A (GB)
Title: Method and apparatus for detecting the entry of formation gas into a well bore
IPC: E21B49/00
Filed: 1973-04-05
Abstract: 1424433 Boring earth &c WESTON INSTRUMENTS INC 5 April 1973 16241/73 Heading E1F The presence of formation gas entering a well during drilling is detected and indicated at the surface to ensure that timely measures are taken to prevent blow-outs. Apparatus 41 is placed between upper and lower relatively movable parts of the drill string (e.g. immediately above the drill collars 13), the apparatus containing a sample chamber 43 in which a sample of drilling mud is trapped at the formation level. The chamber is expanded by relative movement of the parts to reduce the pressure on the sample to at least the saturation pressure, the drill string weight measured by a weight indicator at the surface giving an indication of the amount of gas in the sample. The parts are moved relatively by raising the string at the surface or by holding the level of the string at the surface whilst rotating the string to drill. Apparatus 41 are arranged around the string and each comprises a piston 44 attached to the upper part and a cylinder 41 attached to the lower part and forming with the piston the chamber 43. The apparatus is shown after a sample is trapped but before the piston is raised to expand the chamber. Initially the piston extends to the lower part of the cylinder, a spring loaded rod 53 on the piston holding a spring urged valve member 48 from a seat 47 so that the mud sample is drawn through inlets 50 into the chamber as the piston is raised to the position shown. In the modification shown in Fig. 5B the sample chamber 108 is formed by a piston 109 on the upper part working in a body 102 on the lower part, the body having inlets 113 and the valve member being an enlargement 112 on a rod 111 depending from the piston and engaging a seal 114 in the body 102. In the further modification shown in Fig. 7A the sample chamber 213 is formed by pistons 219, 221 on a mandrel 201 attached to the upper part and projections 214, 215 in the bore of the body 202 attached to the lower part. Initially the pistons are below the projections and as the mandrel is raised to the position shown mud is drawn into the chamber through inlets 218. As the mandrel is moved upwardly from the position shown the pressure of mud in the chamber is reduced because the diameter of the piston 219 is greater than that of the piston 221. As the piston 219 passes the projection 214 mud from the chamber is discharged through outlets 217. If there is little or no gas in the mud sample a shoulder 205 on the mandrel strikes shoulder 206 in the body with sufficient force to give a clearly visible peak reading on the weight indicator. The Specification gives formulae for the circulation of the percentage of gas in a mud sample.
Patent GB-254342-A (GB)
Title: Improvement in mining machines
IPC: E21C29/20
Filed: 1926-06-28
Abstract: 254,342. Sullivan Machinery Co., (Assignees of Holmes, M. P.). June 26, 1925, [Convention date]. Coal-cutting machines. - In a coal-cutting machine which is fed by hauling on an anchored feed chain &c., a further anchored flexible connection is provided together with winding means which are driven by means other than said connection to wind on the connection at a speed substantially equal to the feeding speed of the machine, whereby when the feed chain &c, breaks while undercutting upwardly in an inclined seam, the machine is held by the flexible connection. As shown, a mining machine 1 has a driven sprocket 2 co-operating with an anchored chain 3 to feed the machine, the chain 3 passing round guide pulleys 4, 6 or 4<a>, 6<a> according to the direction of feed. Detachably secured to the leading side of the machine is a plate 11; bolts 14 secure to the plate 11, and together, bearing members 15, 16 for a spindle 22 to which is keyed a drum 26 and a sprocket 54, the latter engaging and being driven by the feed chain 3, whereby an anchored safety cable 27 is wound on the drum 26. Loosely supported in the drum by a sleeve 29 is a ratchet wheel 30 which may be held stationary by a divided brake band 46 connected to the plate 11 by lugs 47 and operated by means of a screw 49 and stirrup 50. A ring 34 is secured to the drum 26 by a semi-permanent clutch 25 and carries reversible pawls 37 which co-ope:rate with the ratchet wheel to prevent running back of the machine if the feed chain 3 breaks. The pawls 37 are adjusted by rotating a handle 43 which has a sleeve 40 supporting the spring-pressed follower pin 42 of the pawls; the handle is then locked to the drum spindle 22 by a screw 44.
Patent GB-917997-A (GB)
Title: Improvements relating to methods for determining lubricant in engine exhaust
IPC: G01N21/72
Filed: 1961-05-05
Abstract: <PICT:0917997/III/1> The rate of consumption of lubricant by an internal combustion engine is determined by dissolving in the lubricant a known concentration of a metallic compound, extracting a known fraction of the exhaust stream and entraining this in a flame, and then photometrically determining the intensity of light generated by the flame of a wavelength characteristic of the metal introduced into the lubricant by the compound.  Sodium mahogany soap is dissolved in the lubricating oil of an engine and a sample of its exhaust products is introduced into the flame of a gas burner. The intensity of light from the flame corresponding to sodium is measured in terms of the intensity of the light corresponding to a substance not normally contained in the exhaust products, such as lithium, by the arrangement shown in which the reference signal corresponding to the lithium intensity is variable for setting-up purposes.  The device is calibrated by measurements on an engine of known characteristics.
Patent GB-630642-A (GB)
Title: Improvements in or relating to a drum screen
IPC: D21D5/06
Filed: 1947-06-20
Abstract: 630,642. Filters, NATIONAL LEAD CO. June 20, 1947, No. 16332. Convention date, Feb. 28, 1945. [Class 46] A rotary drum screen comprises a solid driving head 12, Fig. 2, a hollow discharge head 10, intermediate ring members 14, Fig. 3, a series of bars 24 connecting the heads and ring members, a plurality of thin screen plate assemblies 27,28, Fig. 1, curved to the drum radius and having edge flanges 34 secured to the bars 24; longitudinal clamping pieces 42 clamping the edge flanges to the bars, and bolts 44 between the edge flanges for securing the clamping pieces to the bars. The heads 10, 12 and rings 14 are provided with bosses 16, 20  having semi-cylindrical recesses 18, 22 in which the bars 24 are riveted. Between any two adjacent bars are mounted three screenplate assemblies 28, 27, 28, each assembly comprising four slotted plates 29 of thin stainless steel secured together by radially extending flanges 32. The outer flanges 34 of the two outside plates of each assembly are shaped to fit closely to the bars 24. The radius of curvature of the clamping members 42 is slightly less than that of the outside of the flanges 34 to provide a pinching action on screwing down. The Specification as open to inspection under Sect. 91 comprises also an arrangement in which the edge flanges 34 of each plate assembly are formed substantially at right angles to the screen surface and are seated in longitudinal grooves in the bars 24, inverted-U clamping members being provided as before. This subject matter does not appear in the Specification as accepted.
Patent GB-561563-A (GB)
Title: Improvements in and relating to rotary pumps and motors
IPC: F01B13/06
Filed: 1942-11-20
Abstract: 561,563. Liquid - pressure engines. WILSON, W. G. Nov. 20, 1942, No. 16453. [Class 69 (ii)] [Also in Group XXVIII] In a reversible rotary pump or motor in which radial cylinders rotate about a stationary valve and in which the stroke of the pistons is varied by means of a ring of adjustable eccentricity, the pistons engaging with a separate guide frame which is outside the cylinder block and which is pivoted about a fixed centre external to the assembly, the valve comprises a primary sleeve 12, a secondary sleeve 14, and a central core 15, the cylinder block 10 and the sleeve 12 being rotated about the sleeve 14 by means of a Hooke's joint 22 and a driving shaft 17. There are an even number of cylinders 11 and they register with radial ports 13 in the sleeve 12 and arcuate parts 25, 26 in the sleeve 14, the ports 25, 26 communicating by longitudinal grooves 23, 24 in the core 15, and ports 27, 28 in the opposite end of the sleeve 14, with suction and delivery chambers 29, 30. Lubrication between the sleeves 12, 14 is effected by means of cataract grooves 57 and annular recesses 58. Each piston 32 is fitted with a trunnion block 34 with pins 35 which project through slots 36 in the cylinders 11 and engage the outer ends of connecting rods 37, the inner ends of which pivot freely on pins 38 secured to the hubs of U-shaped annular housings each formed by a pair of. discs 39, 40. The two housings are connected together by bolts 39a and are supported by bearings 41 inside frames 42 connected together by bolts 43. These frames 42 are pivoted about an external fulcrum pin 44 carried by fixed brackets 45 and can be swung laterally to vary the eccentricity by means of a rod 46 secured to one of the bolts 43. In a modification, the ends of the pins 35 are fitted with segmental blocks which slide in channelled rings and the delivery port is coaxial with the core 15.
Patent GB-965272-A (GB)
Title: Improvements in or relating to screw-nut assemblies
IPC: F16H25/22
Filed: 1961-05-05
Abstract: 965,272. Screw-and-nut gearing. M. STRASSBERG. May 5, 1961 [Feb. 28, 1961], No. 16473/61. Heading F2Q. In a screw and nut mechanism, particularly for operating valves, machine tool holders or steering gear, contiguous cylindrical rollers 15, 16 arranged between the threads of the screw 1 and nut 2 are recirculated through a return passage 17 formed in the nut, successive rollers having their axes perpendicular to each other. As shown the thread grooves in the screw and nut are formed in cross-section as a right-angled triangle with small channels 7 so that the rollers circulate in a helical passage of substantially square section and have an axial length slightly less than their diameter. The return passage 17 is formed as a groove of square section and semi-circular extent in an insert 21 held in a cavity in the nut by an axial pin, the ends of the semi-circular groove being connected tangentially to the screw threads by junction tubes 18 whose ends are shaped, Fig. 8 (not shown), to deflect the rollers. The insert 21 is preferably provided with a semi-circular cover plate 22 for the groove 17.
Patent GB-508059-A (GB)
Title: Improvements relating to rate of climb indicators for aircraft and like rate of change of fluid pressure responsive indicating instruments
IPC: G01P3/62
Filed: 1937-09-17
Abstract: 508,059. Pressure gauges. BENDIX AVIATION CORPORATION. Sept. 17, 1937, No. 16505/39. Convention date, Sept. 17, 1936. Divided out of 507,990. [Class 106 (ii)] A rate of change of fluid pressure indicator more particularly for ascertaining the rate of climb of aircraft comprises a pressure responsive element and means forming a restricted gas flow communication between opposite sides of the element, said means being constituted by a diffuser of a porous nature and in which the porosity is varied in response to temperature variation. The invention is described as applied to an indicator as described in Specification 507,990 and in Fig. 2 (not shown). Diffuser elements in accordance with the present invention are shown in Figs. 3 and 5. The diffuser Fig. 3, is formed by a number of thin washers 22 preferably of metal clamped between upper and lower members 23, 24 by a bolt 25 and nuts 26. The member 23 has an extension 27 with parallel grooves 28 to permit passage of air from,the stack of washers to the chamber 29 and thence through the tube 30 to the pressure responsive element of Fig. 2. The surfaces of the washers arc etched or corrugated to give the desired porosity. The parts are made of materials to provide a bi-metallic action to regulate the pressure on the stack. In a modification shown in Fig. 5 the temperature compensating effect is increased by a cylindrical spacer 36 placed between the member 33 and a disc 35.
Patent GB-722292-A (GB)
Title: Improvements in or relating to the production of glass fiber polyester resin products
IPC: C08G63/676
Filed: 1952-07-02
Abstract: Moulding compositions comprise glass fibres, preferably between 35 to 65 per cent by weight and, adhered thereto, a dry solid resin composition consisting of a vinyl polymerization catalyst and a polyester or mixture of polyesters of melting-point at least 80 DEG C. and which are derived from ethene dicarboxylic acids and a stoichiometric amount of a polyhydric alcohol selected from (a) dihydric alcohols of formula <FORM:0722292/IV (a)/1> wherein R is an alkylene radical of 2 or 3 carbon atoms, A is a 2-alkylidene radical of 3 or 4 carbon atoms, m and n are at least one and the average of m+n is less than 3; or (b) mixtures of 50 mol. per cent of (a) with from 0 to 50 mol. per cent of ethylene, diethylene or propylene glycol and from 0 to 10 mol. per cent of a polyhydric alcohol containing 3 to 6 carbon atoms and at least 3 hydroxyl groups.  A non-volatile cross-linking agent in amount insufficient to cause tackiness may also be included.  Specified polyesters are the fumarates of 2,2-di-(4-hydroxy-propoxy-phenyl)-propane, a mixture of 96 mol. per cent of 2,2-di-(4-hydroxyethoxy-phenyl)-propane and 4 mol. per cent of glycerol and a mixture of 50 mol. per cent 2,2 - di - (4 - hydroxy - propoxy - phenyl) - propane and 50 mol. per cent of ethylene glycol and the maleates of 2,2-di-(4-hydroxy-propoxy-phenyl)-butane and of the polyoxyethylene ether of 2-butylidene diphenol.  Cross-linking agents listed are diallyl maleate, diallyl phthalate, triallyl phosphate, diallyl succinate, diallyl phenyl phosphonate, allyldiglycol carbonate, dicrotyl esters of dibasic acids and diacrylates or dicrotonates of the lower glycols.  Catalysts which may be used are benzoyl and lauroyl peroxides, t.-butyl perbenzoate, per acid esters, stannic chloride and cobalt nitrate. The product is obtained by subjecting the composition to a temperature above the fusion temperature of the polyester but below its curing temperature.  It may be cured by moulding under pressure.  Examples illustrate the production of structures prepared from (I and II) prebonded glass fibres and from (III) chopped glass fibre strands.  The process may be continuous. The products are useful as wall panels, table tops, shelving, trays, suitcase parts and as housings for electrical equipment. Specifications 722,264, 722,265 and 722,266 are referred to.
Patent GB-1248992-A (GB)
Title: Electric coils
IPC: H01B7/08
Filed: 1969-03-31
Abstract: 1,248,992. Laminate. ROLAMITE TECHNOLOGY Inc. 31 March, 1969 [19 April, 1968], No. 16721/69. Heading B6N. [Also in Division H1] A coil winding sheet comprises a thin flexible elongate web of insulating material having a conductive track in the form of a spiral surrounding a longitudinal slot in the web. The web may be produced by adhesively securing a sheet of Cu, Al, or Cu alloy to a " Mylar " (Registered Trade Mark) web by means of a thermosetting resin which is partially cured. The conductive sheet is then etched to form the desired pattern of conductive tracks which are then subjected to pressure to displace some of the adhesive into the spaces between the tracks. The assembly is then heated to fully cure the resin. Two strips on which the spiral tracks terminate are partly cut out of the web to form leads and the web is wound by rolling one end to form a loop which is passed over the opposite end resulting in a structure in which the upper and lower bands of the web are wound in opposite directions so that the upper coil has its conductors on the outside of each turn while the lower coil has its conductors on the inside of each turn. An alternative winding method using two mandrels which are rotated and passed through the slot is described and results in the same coil structure. The coils are in fluxaiding relationship and a straight magnetic core may be inserted through a pair of coils or a U- shaped core may be utilized. The web may be rolled up from one end to form a pair of coils in flux-opposing relationship one of which may be turned end-for-end and a magnetic core inserted.
Patent GB-720625-A (GB)
Title: Electrically heated vessel
IPC: A47J27/21
Filed: 1952-07-03
Abstract: 720,625. Electrically-heated vessels. DITTGEN, J. K. July 2, 1953 [July 3, 1952]. No. 16738/52. Class 39 (3). An electrically-heated vessel e.g. a pot or kettle, having an inwardly protruding annular groove a in its bottom or side wall housing an electrical wire heating element b, has the groove a covered at its outside by heat insulation c, a metal ring d covering the insulation c. If the vessel is a kettle, it may be formed from a single sheet of material, and have a top aperture for a lid, or it may be a " closed kettle, i.e. the spout is the only aperture in its wall, in which case it is made from separate upper and lower parts, either of which may have the groove a, each part being formed from a single sheet of material.
Patent GB-1379317-A (GB)
Title: High frequency automatic gain control circuits
Inventor: CARLSON D J
IPC: H03G3/30
Filed: 1972-04-12
Abstract: 1379317 Gain control circuits RCA CORPORATION 12 April 1972 [14 April 1971] 16819/72 Heading H3T  A high-frequency gain controlled circuit comprises a transistor in common base connection, its input circuit including a resistive element connected between emitter and a point of reference potential, a unilateral conducting device with a first terminal direct coupled to the emitter of the transistor, means coupling the second terminal to reference potential at signal frequencies, and means for coupling a source of automatic gain controlling bias to both the transistor and the unilateral conducting device to cause the emitter current to decrease and the current in the unilateral device to increase with increase in controlling bias, the input circuit of the transistor being coupled to a mixer circuit. In a television receiver, aerial terminal 70 is coupled to the emitter of a grounded base R.F. amplifier 75 via inductor 71, capacitor 72 and a U.H.F. filter 73 tuned by means of varactor diode 74. The collector of transistor 75 is coupled to the cathode of a mixer diode 83 via resistor 76, R.F. blocking inductor 77, filter 79 tuned by means of varactor diode 80, and impedance-matching network 82. The local oscillator 84 is tuned by means of varactor diode 85 and is capacity-coupled to the anode of mixer 83, which is turn coupled by means of capacitor 86, inductor 113 and resistor 115 to the emitter of a grounded-base I.F. amplifier 94. The collector of transistor 94 is coupled to an I.F. output terminal via feed-through capacitors 99, 100, inductors 95, 103 and capacitors 101, 102, an inductor 96 serving for the application of the collector voltage. Spurious oscillations are prevented by means of a ferrite bead 98 surrounding the collector lead of transistor 98. Am A.G.C. voltage is applied via emitter-follower 110 to the base of R.F. transistor 75 and via diode 116 and inductor 113 to the emitter of I.F. transistor 94; changes in impedance presented by the diode 116 to the anode of the mixer 83 compensate for changes in the emitter impedance of transistor 94 as the gain control voltage varies. In a second embodiment, the gain control voltage is of opposite sign and is applied to the base of the I.F. amplifier directly, and the compensating diode is connected between the emitter of the transistor and a point of fixed potential (Fig. 2, not shown).
Patent GB-497290-A (GB)
Title: Ignition control for internal combustion engines
IPC: F02P5/07
Filed: 1937-06-18
Abstract: 497,290. Timing ignition. LIDSEY, A. J., and ALLWOOD, F. F. June 18, 1937, No. 17005. [Class 7 (iv)] The interrupter cam A<1> is adjusted by a governor A' responsive to engine speed, and the rocker carrier or casing is connected to the throttle control linkage, whereby ignition advance is effected during the first part of throttle opening and retardation during the remainder of that operation. An arm B and rod B<1> connect the interrupter casing to a lever C, the other arm of which is connected by a rod D to a two-armed spring-restrained lever D<1>, D<2>. A roller D<3> on the arm D<2> bears on a cam G carried by a spindle F to which members H, H<5> of the throttle control linkage are secured. The fulcrum of the lever C is adjustable manually through the links C2, C<6> and intervening spindle C<3>.