baber/WOPTO huggingface dataset:
Patent GB-960140-A (GB)
Title: Improvements in or relating to thermo-stable fluorinated polymers
IPC: C08G12/22
Filed: 1962-01-19
Abstract: In an example, diethyl dodecafluorosuberate was prepared by esterifying dodecafluorosuberic acid with ethanol in the presence of sulphuric acid.  An ethanol/water solution of the ester was then reacted with hydrazine to give dodecafluorosuberodihydrazide which was recrystallised from ethanol.  Other perfluoroacyldihydrazides are obtainable similarly.ALSO:Fluorine containing polyhydrazides have a repeating unit of formula: <FORM:0960140/C3/1> where Rf is a perfluoroalkylene radical of at least 3 carbon atoms and Ar is a bivalent aromatic hydrocarbon radical of 6 to 18 carbon atoms which may be substituted by alkyl, alkoxyl or halogen radicals.  The polymers may be prepared by reacting a perfluoroacyldihydrazide, H2N-NH.CO.Rf.CO.NH.NH2, with an equimolecular proportion of an aromatic dialdehyde, OHC.Ar.CHO, where Rf and Ar are as defined above, with the elimination of water.  Many suitable perfluorodihydrazides and aromatic dialdehydes are specified.  In the examples polymers are prepared from dodecafluorosuberodihydrazide and terephthalaldehyde or isophthalaldehyde.  The thermally stable, fusible products based on isophthalaldehyde may be used as heat transfer media.  The thermally stable, infusible terephthalaldehyde based products may be used to increase the viscosity of the fusible polymers.
Patent GB-820542-A (GB)
Title: Improvements in the removal of metals from mineral oils
Inventor: SMITH ROBERT LEWIS
IPC: C10G25/02
Filed: 1955-01-25
Abstract: Metal ions are removed from mineral oils by the use of a chelating resin which has been freed from water, the chelating resin being defined as an insoluble polymeric material containing specific groups such as amino carboxylic acids capable of forming co-valently bound complexes with metallic ions, as distinct from ion exchange resins in which the metal is held by electro-valent linkages.  Water is preferably removed from the resin by washing in a series of solvents, the first of which is totally miscible with water and the last is similar to or the same as the mineral oil to be purified.  The oil and resin are preferably heated together, e.g. to 60-80 DEG  C.
Patent GB-1044112-A (GB)
Title: Method of producing an oil bearing formation
IPC: E21B43/24
Filed: 1965-01-18
Abstract: 1,044,112. Wells, &c. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. Jan. 18, 1965 [Jan. 20, 1964], No. 2160/65. Heading E1F. Oil is recovered from a formation 27 penetrated by an injection well 15 and a production well 16 by fracturing the formation between the wells to provide fluid flow communication between the wells injecting hot preheat fluid down the wells through the fracture 30 into the formation, and injecting oil-displacing fluid into the well 15 and producing oil from the well 16. After a period the direction of flow in the formation may be reversed. The displacing fluid is liquid or gas, either hot or cold, and is injected at a pressure to allow the fracture to close. During injection of preheat fluid the well may be thermally insulated from the formation or the adjacent formation may be cooled. Steam may form both the preheat and displacement fluids in the recovery of tar from tar sands the preheat fluid is the liquid fraction of hydrocarbons distilled from the tar, and the fracture may be held open prior to heating by means of an unheated light fraction of the tar hydrocarbon or other suitable solvent. The method is suitable for the recovery of oil from formations which tend to cave in when heated to the temperature at which the oil can flow
Patent GB-1472703-A (GB)
Title: Hot gas piston engines
IPC: F02G1/043
Filed: 1975-01-17
Abstract: 1472703 Hot gas engines MOTORENWERKE MANNHEIM AG 17 Jan 1975 [18 Jan 1974] 2223/75 Heading F1S A series of hot gas piston engines of various power ratings comprises a hot gas piston engine of a lower rating including a pair of in-line cylinders consisting of a cold cylinder and a hot cylinder and a hot gas piston engine of a higher rating including in-line double-acting cylinders, the spacing between any two adjacent cylinders of any engine of the series being the same for all engines of the series. Fig. 6 shows a single-acting engine with cold cylinders 1 and hot cylinders 2. This engine represents a trebling of the engine of Fig. 2 (not shown) which has only two cylinders. The double-acting engines are described with reference to Figs. 7-10 (not shown). It is stated that the heaters 7 with associated hot transfer ducts and the upper housing portions with regenerator 6 and coolers 5 are same as the corresponding parts of the single-acting engines described, but are turned through 90 degrees relative thereto. The engines have power output ratings in the ratio 1:2:3:4:6 and are constructed of components which are identical to each other throughout the series or are required in a small number only of variant forms. The engines may be horizontally arranged. United States Specifications 3808815 and 3829945 are referred to.
Patent GB-781502-A (GB)
Title: Omega-haloalkyl quaternary ammonium salts and preparation thereof
IPC: C07C209/12
Filed: 1955-01-25
Abstract: The invention comprises certain omegahaloakyl quaternary ammonium and heterocyclic halides and the process of preparing them by the reaction between a tertiary amine and an a -o -alkylene dihalide in excess, in an anhydrous solvent.  In examples, 1 : 3-dibromopropane combines with methyldiethylamine to give 3 - bromopropyldiethylmethylammonium bromide, and 1 : 6-dibromohexane combines with trimethylamine to give 6-bromohexyltrimethylammonium bromide; other products specified include 3 - bromopropyl - N - methylpiperidinium bromide and the corresponding pyrrolidine compound, 3-bromopropyl benzyl dimethylammonium bromide, 7-chloroheptyl-N-propyl pyrrolidinium chloride, 12-iodododecyl - N - benzylpiperidinium iodide, and 12 - iodododecyltrimethylammonium iodide; the invention also comprises the products and process by which a product having the formula <FORM:0781502/IV (a)/1> in which X and Y may be the same or different, R and R1 are alkyl radicals of 1-8 C atoms or together, pyrrolidyl, piperidyl or morpholino, R11 is a radical of 1-8 C atoms or aralkyl, and n is 3-12, by reaction of a dialkylamino alkanol <FORM:0781502/IV (a)/2> with an alkyl halide R11X followed by reaction with a hydrogen halide HY; products in which X and Y are the same are referred to above; in examples, 3 - bromopropyldiethylmethyl ammonium bromide, and 3-bromopropyl-N-methyl piperidinium bromide are obtained by the above method.  Other products specified include omega - bromopentyl and - decyl - trimethylammonium bromides, and 3-bromopropyl benzyldimethyl ammonium bromide.
Patent GB-246523-A (GB)
Title: Improvements in and relating to clocks
IPC: G04C1/06
Filed: 1926-01-26
Abstract: 246,523. Szente, A. Jan. 26, 1925, [Convention date]. Winding-apparatus, electric and hand. - In order to adapt a clock to be wound up electrically utilizing a constant supply of any kind of current or voltage, the winding magnet and mechanism are made as a separate unit readily detachable from the clock or the horse-shoe magnet is provided with two long legs on which are placed a number of different windings, only one of which is used at one time. Further the winding spindle may project through the dial and be provided with a disc or pointer to indicate the rotation of the spring spindle. The hand-setting shaft may project through the winding unit and the back of the clock case and the winding spindle may project through the said back and be provided with a detachable grip for winding up the clock by hand. Fig. 1 shows an ordinary clock movement mounted between plates 2 and 3 and having a winding spindle, an extension 5 of which engages the detachable winding unit shown in Fig. 2, wherein 8 are the inter changeable coils, 6 the horse-shoe magnet and 7 the ratchet wheel actuated bv the rocking armature in the usual manner. This armature rotates freely upon a sleeve 5<a> on the plate 3 so that the winding spindle and armature can function independently. b is the spring barrel and c the escapement. A modification shows a magnet with long legs and also a rotation indicator as mentioned above.
Patent GB-472147-A (GB)
Title: Instrument for determining exposures for photographic purposes
IPC: G01J1/42
Filed: 1937-01-26
Abstract: 472,147. Photo-electric photometers. TRUECOLOUR FILM, Ltd., DOLGORUKI, E. SANDERS-, and WHALEN, F. C. Jan. 26, 1937, No. 2257. [Class 40 (iii)] [Also in Group XX] A photo-electric photometer comprises a photo-electric cell, means for estimating the intensity of the light falling thereon, an adjustable focusing lens, and a mask in the focal plane of the lens embodying a small aperture positioned in front of the cell whereby the optical field of the photometer is restricted to a narrow pencil to permit a reading to be obtained of the intensity of light reflected from a standard surface located at or adjacent the scene to be photographed. As shown, the apparatus comprises a lens 2, at the focal plane of which is a mask with a square aperture, in a mounting 3 slidable in a tube 7. A tube 8, connected to the mounting 3 by pins 9, is slidable on the tube 7, and has a rack 10 engaged by a pinion on the spindle 12 provided with an operating knob 13. The metal case 16 encloses a photo-electric cell P and an electrometer triode T. A mirror 18 carrying a ruled square 20, may be moved by a rod 28 to throw an image on to the screen 19 or to inoperative position. The circuit is shown in Fig. 4, P being the photo-electric cell, T the electrometer triode and V a triode valve. The anode of T is connected through the battery B to the control grid of V, which is also connected through a resistance r to the cathode. In the anode circuit of V is a relay R<1>, the movable contact a of which is connected to a battery B<1> and the fixed contact b of which is connected to the cathode of P and the control grid of T. When a negative charge is applied to P through the contacts a, b, this charge, which is also applied to the control grid of T, stops the anode current in T, and accordingly the grid of V is substantially at cathode potential, and the anode current holds relay R<1> open. As the charge leaks away through P, an increasing negative potential is applied to the grid of V and the anode current decreases to a point at which relay R<1> closes to apply a fresh negative charge to P. A second relay R2, across which is connected a rectifier W to minimize sparking, operates a counter. The contact b of the relay R<1> is supported by a quartz tube. A carrying case for the instrument may be provided with a universal mounting and also with a rotary carrier for colour filters.
Patent GB-682049-A (GB)
Title: Improvements in and relating to automatic hydraulic regulating systems
IPC: F02C9/16
Filed: 1951-01-30
Abstract: 682,049. Gas turbine plant. BRITISH THOMSON HOUSTON CO., Ltd., Jan. 30, 1951 [Feb. 9, 1950], No. 2326/51. Class 110(iii) [Also in Group XXIX] The fuel supply to a gas turbine power plant is controlled in accordance with changes in the exhaust temperature of the gas leaving the turbine by a hydraulic actuating mechanism which has no effect on the fuel " throttle unless the temperature reaches a predetermined maximum value or changes at more than a predetermined rate. As shown a temperature responsive device 4 in the exhaust conduit 3 of the turbine 2 influences a bellows 6 connected through a floating lever 28 to the pilot valve 18, of the hydraulic actuator. The latter also comprises a follow-up piston 13, an output piston 12 with a restricted by-pass passage 49, and spring-centralized surge piston 40 hydraulically connected to opposite sides of the piston 12. The output piston 12, which also has centralising springs, is connected through rack and pinion mechanism 8, 9 to fuel " throttle ". Specification 680.209 is referred to.
Patent GB-201517-A (GB)
Title: Improvements in cast steel railway track members
IPC: E01B7/28
Filed: 1923-01-25
Abstract: 201,517. American Manganese Steel Co., (Assignees of Nichols, W. G.). July 28, 1922, [Convention date]. Crossings without movable parts; points with fixed tongues; point tongues, mounting of.-A cast steel track-member has upon its under-side a substantially continuous integral sustaining mass 12 which is formed with a plurality of isolated recesses 13 - - 17 sub-dividing the mass into variously directed curved reinforcing-walls 18 - - 21 which may intersect and truss one another. Some of the walls extend from side to side of the member, while of the others some are longitudinal and some transverse to the tread portions 1, 2 of the member. The recesses extend vertically but terminate short of the tread portions and flange-ways 3, 4 so as to leave an horizontally continuous body of metal. The sustaining mass underlies substantially the entire area of the member and extends down to the supporting plane of the member. Crossings, points, and switches are formed in this way from manganese steel, to facilitate the subsequent heat-treatment.
Patent GB-1179811-A (GB)
Title: Improvements in or relating to a servovalve
Inventor: STAMPFLI H
IPC: F16K31/40
Filed: 1968-01-16
Abstract: 1,179,811. Valves. LUCIFER S.A. 16 Jan., 1968 [1 Feb., 19671, No. 2336/68. Heading F2V. In a servo valve, control of fluid flow from an inlet 2 to an outlet 3 is effected by means of a closure member 6 which is movable between its two extreme positions by means of a diaphragm 18, which diaphragm is responsive to the fluid pressure differential existing across it and to the downward bias to which it is subjected by a spring 22. Formed between the back side of the diaphragm and the top part 21 of the valve housing 1, in a chamber 23 to which fluid from the inlet 2 is allowed to pass via a restricted passage 24, 25, 27, 28, and from which fluid can be vented to the outlet 3 by suitable energization of an electromagnetically operated valve 32 which results in a non-restricted passage 29, 30, 31 becoming open. With the chamber 23 pressurized, such pressure force together with the spring force causes the diaphragm to move downwardly and the valve closure member 6 to be seated, whereas absence of pressure in the chamber permits the pressure at the inlet to overcome all downwardly acting forces and so raise the diaphragm and hence the valve member. In moving between its extreme positions, the valve member 6 is guided by three fingers 11 formed integrally therewith and movable within a bore the upper end of which constitutes the valve seat 5, and by a shaft 7 which is guided in a bore 8 and is secured to the valve member by a nut 15, there being disposed between the nut, shaft and valve member, a hemispherical member 14 and a plate member 13, which plate member is fastened to the diaphragm backing- plate 17. The arrangement of the valve parts is such that the valve member moves along a line which is obliquely disposed with respect to the axis of chamber 23 and hence to the same of diaphragm 18.
Patent GB-104185-A (GB)
Title: Improvements in Field Tents.
Inventor: HARRIS RICHARD GREEN
IPC: E04H15/44
Filed: 1917-02-16
Abstract: 104,185. Harris, R. G. Feb. 16, 1917, [Convention date]. Tents.-Comprises framework for a tent either with ridge roof and vertical sides, or with bell roof and vertical wall. The ridge, composed of T-section beams 11 connected by a cap, is supported at each end by a pair of uprights 27 and two rafters 19, also of T-section having pin- and-eye connexion 28 with the upright and hook-and-eye connexion 24, 25 with the ridge beams. The uprights carry pallets 31 resting on pins 29 to facilitate insertion in the ground. The central cap, containing a ventilator 37, is composed of two cone-frusta 6, 7 on radial ribs 9, 10, to two of which (10) the inner ends of the ridge beams are permanently pivoted. Bolts 16 passing through the cap in the plane of these ribs carry pivoted arms 15, which are lodged in holes 14 in the beams to give rigidity. To make a tent with bell roof, the rafters are hooked to the other ribs (9), and the ridge beams are let down to the same slope, the hooks being lodged in further removed holes 13.
Patent GB-746226-A (GB)
Title: Starch-coated paper-base masters for planographic printing
IPC: D21H19/62
Filed: 1954-01-26
Abstract: 746,226. Coated paper. WARREN CO., S. D. Jan. 26, 1954 [April 17, 1953], No. 2339/54. Class 96. [Also in Group XVI] A coating for a paper base for planographic printing plates comprises finely-divided inert mineral pigment or clay and a hydrophilic, water-insoluble reaction product of a watersoluble hydroxyalkylated starch with a watersoluble amino-resin, e.g. a melamine-formaldehyde condensate. The starch may be ethylene oxide treated, and monochloracetic acid may be added to reduce the pH value to about 5.5 to assist the curing of the amino-resin, which is effected by heating. Propyl alcohol may also be included. A further coating may be applied to the reverse side of the paper base to prevent curling.
Patent GB-196395-A (GB)
Title: Improvements in steam traps and such like
IPC: G05D23/12
Filed: 1922-01-26
Abstract: 196,395. Wingfield, B. R. Jan. 26, 1922. Steam traps; thermostats.-In steam traps of the capsule or tube types, as shown respectively in Figs. 1 and 2, a safety device comprises a spring 5 mounted in the casing forming the regulating screw. This arrangement allows for the expansion of the capsule 2 or a movement of the tube against the action of the spring in the direction away from the closed valve. Specification 180,124 is referred to.
Patent GB-740627-A (GB)
Title: Improvements in or relating to non-slipping devices for horseshoes
IPC: A01L7/10
Filed: 1953-01-27
Abstract: 740,627. Bolts &c. EISNER, P. J. S. Jan. 27, 1954 [Jan. 27, 1953], No. 2341/53. Class 89 (1). [Also in Group I] A steel horse-shoe calk (see Group I), comprises an enlarged head 3 accommodating a projecting annular insert 6 of hard metal and adapted for engagement by a spanner and a tapered or parallel cylindrical shank 2 which may be screwthreaded.
Patent GB-489501-A (GB)
Title: Improvements in or relating to calculating slide rules
IPC: G06G1/02
Filed: 1937-01-28
Abstract: 489,501. Calculating apparatus. FOUNTAINE, C. A. Jan. 28, 1937, No. 2476. [Class 106 (i)] A slide-rule is provided with a slide having a stop or stops thereon at one or both ends and arranged at distances from the end graduations of the scales equal to the distance of the index line of the cursor from the corresponding edge of the cursor. In the form shown, the slide rule is inscribed with the usual scales A to D, trigonometrical scales, a reciprocal scale E, log-log scales L, L<1>, and percentage and deviation scales W<1>, W<2>, as described in Specification 411,090. The slide is formed with right- and left-hand stops R, L<2> which project upwardly from the surface of the slide. The cursor K comprises a frame carrying a sheet of transparent material on the underside of which is a main index line K<1>. The frame mav be formed with an extension on which is pivoted a serrated wheel with sets of numerals for use in ascertaining the decimal point position as described in Specification 489,603.
Patent GB-662154-A (GB)
Title: Improvements in luminescent materials for television screens
IPC: H01J29/18
Filed: 1949-01-28
Abstract: 662,154. Luminescent materials. DERBY & CO., Ltd., and MEYER, H. Jan. 23, 1950 [Jan. 28, 1949], No. 2488/49. Class 39 (i). A luminescent material consists of a mixture of a silver-activated zinc sulphide phosphor and a zinc cadmium sulphide selenide phosphor containing 30 to 38 moles. per cent zinc, 12 to 20 moles per cent cadmium, 44 to 46 moles. per cent sulphur, 4 to 6 moles. per cent selenium, and activated by silver, or silver and copper. The phosphor is prepared by mixing zinc sulphide, cadmium sulphide and zinc (or cadmium) selenide together with the activators and fluxes such as the chlorides of sodium, magnesium, barium and ammonium, fired, washed and sieved.
Patent GB-632128-A (GB)
Title: Improvements in or relating to valve gear for four-stroke internal combustion engines
IPC: F01L1/44
Filed: 1948-01-28
Abstract: 632,128. Valve-gear. BOORER, A. Jan. 28, 1948, No. 2613. [Class 7 (vi)] In a four stroke multi-cylinder engine wherein the intake and exhaust ports 16, 17 of each cylinder are controlled by rotary valves 20, 24 and by a master poppet valve 14, the exhaust valve 24 is provided with straight-through passages 25, which open the ports 17 twice each revolution of the valve, and is driven at quarter engine speed, and the inlet valve 20 is provided with ports 21 which open the ports 16 once each revolution of the valve and is driven at half engine speed, Air or combustible mixture is supplied to the interior of the valve 20 either through an open end of the valve or through a ring of ports midway along the valve. The master valve 14 opens about 40 degrees before bottom dead centre of the expansion stroke and closes about 40 degrees after bottom dead centre of the inlet stroke, and the exhaust port 17 is arranged to be fully opened by the time the master valve 14 opens, the inlet port 16 being still partially open when the valve 14 closes. Specifications 566,416 and 566,450 are referred to.
Patent GB-305536-A (GB)
Title: Method for the purification of benzanthrones
IPC: C09B3/02
Filed: 1929-01-25
Abstract: 305,536. Newport Co., (Asignees of Gubelmann, I., Goodrich, R. J., and Howell, E. T.). Feb. 6, 1928, [Convention date]. Benzanthrones.-Benzanthrone or a derivative thereof is obtained in a pure state from a masscontaining it together with impurities in sulphuric acid by treating the mass with a solvent for the benzanthrone immiscible with the sulphuric acid and recovering the benzanthrone from the solution thus formed. The process is particularly applicable to the crude reaction massesobtained by the general methods of preparation, for example by condensing an anthranol with glycerine in the presence of sulphuric acid. Before adding the solvent, the mass is preferably diluted with water until the concentration of the sulphuric acid is 65 per cent or less; in acid of this concentration, the impurities remain in solution, whereas benzanthrone and its substitution products are sufficiently insoluble to permit' of their extraction with a solvent. As solvents, benzene and its homologues, including toluene and xylene, and o-dichlorbenzene are suitable; other solvents such as tetrachlorethane and ethylene dichloride may also be used. In an example, benzanthrone is extracted from the reaction mass obtained by condensing anthranol with glycerine in concentrated sulphuric acid by diluting with water to give an acid concentration of about 65 per cent, continuously passing toluene upwardly through the mass, which is maintained at about 60‹ C., continuously removing the toluene solution of benzanthrone thus formed, distilling off part of the toluene for fresh extraction of benzanthrone, and finally recovering the benzanthrone from the toluene solution. Derivatives of benzanthrone, such as methylbenzanthrone, may be isolated in a similar manner from masses containing them.