baber/WOPTO huggingface dataset:
Patent GB-700334-A (GB)
Title: Allyl esters of alkyl xanthates
IPC: C07C329/00
Filed: 1951-08-27
Abstract: The invention comprises xanthates of formula <FORM:0700334/IV(b)/1> where R is a saturated hydrocarbon radicle of 1-6 carbon atoms. In Examples allyl chloride is reacted with (1) carbon disulphide, methanol and aqueous potassium hydroxide; (2) carbon disulphide, n-propanol and aqueous sodium hydroxide; (3) sodium ethylxanthate in acetone; (4) sodium sec-butylxanthate in water and (5) sodium isopropylxanthate in water to produce the appropriate xanthate and in (6) butyl, isobutyl, secamyl, methylamyl and cyclohexyl 5-allylxanthates are made by the methods of (1)-(5) together with a xanthate derived from a mixture of pentanols.  The compounds are used in ore flotation (see Group II).ALSO:Sulphide or precious metal ore pulps are subjected to froth flotation in the presence of a collector of formula <FORM:0700334/II/1> where R is a saturated hydrocarbon radicle of 1-6 carbon atoms. They may be used in acid circuit flotations with sulphide ores of copper.  In examples (7) a ground copper ore is treated in the presence of 0.2 lb./ton of alkyl isopropyl-xanthate, sulphuric acid and cresylic acid and results compared with those obtained when the alkyl xanthate is replaced by alkyl alkyl-xanthate, propyl isopropylxanthate and isopropyl isopropylxanthate, (8) a ground sulphide copper ore is treated in the presence of sulphuric and cresylic acids with 0.2 lb./ton of alkyl methyl, ethyl, propyl, isopropyl, butyl, isobutyl sec. butyl, sec. amyl, and "Pentasol" (Registered Trade Mark) xanthates and results obtained compared with those when using sodium ethylxanthate as flotation agent, (9) a sulphide and oxide copper ore is ground and leached with sulphuric acid. copper precipitated with sponge iron excess iron being removed magnetically, and the sulphide copper minerals and precipitated copper floated with fine oil and 0.2 lb./ton of allyl ethyl, methyl or propylxanthates, (10) a ground zinc ore is floated with copper sulphate, pine oil and 0.1 lb./ton of allyl isopropyl, ethyl, propyl or sec. butyl xanthates and in (11) a pyritic gold ore is floated with pine oil and 0.18 lb./ton of allyl ethylxanthate.
Patent GB-531396-A (GB)
Title: Improvements in contact members for electric switch gear
IPC: H01H19/62
Filed: 1939-07-11
Abstract: 531,396. Switch contacts. RESEARCH ENGINEERS, Ltd., GOODHART, G. C., GLADSTONE, W. S., and MATTHEWS, W. R. July 11, 1939, No. 20201. [Class 38 (v)] One or more self aligning contacts 42 are engageable by contacts 34 on a beam which is rocked about an axis 32 by a cam 36 which engages a cam-follower 52 carried by two springs 45, 46, one of which is fixed to a support 48 and the other to the beam. There may be two similar beams on the same axis 32 operated by other cams 36 on the axis 35 and carrying similar contacts and the whole may form a device which is associated with a step-by-step motor and a telegraphic control for giving signals to the engine room of a ship. The cooperating contacts are preferably of different metals such as tungsten, silver, platinum and the self-aligning contact 42 may be constructed as in Fig. 5 with a hemi-spherical part 12 and a stem 13 and a spring 19 to hold it down on its seating.
Patent GB-774987-A (GB)
Title: Improvements in or relating to novel chemical compounds useful in the synthesis of lysergic acid and its homologues and process for preparing such compounds
Filed: 1954-10-25
Abstract: The invention comprises octahydro-indoloquinolines (ergolenes) of the formula <FORM:0774987/IV(b)/1> where R1 is C1-C8 alkyl, and acid additio salts thereof.  These are made by the action of strong alkali on hexahydro-benzindoles of the formula <FORM:0774987/IV(b)/2> (see Specification 774,986), followed, if desired, by salt formation with the appropriate mineral acid.  An example is given of the process where R1 is methyl, the product being obtained as hydrochloride.  The strong alkali may be an alkali hydroxide or alkoxide.  The alkyl group R1 may also be ethyl, propyl or n-heptyl.  The products are intermediates in the synthesis of lysergic acid and its homologues.
Patent GB-1394392-A (GB)
Title: Pile drivers
IPC: G01L1/26
Filed: 1972-05-02
Abstract: 1394392 Pile caps L L FREDERICK 2 May 1972 [11 May 1971] 20381/72 Heading E1H [Also in Division G1] A pile cap comprises an elastomeric cushion 27 received within a recess within a body, the cushion lying in the line of force transmission between driver and pile, and provided with a passage 28 for liquid coolant. The body defines a reservoir 15 for e.g. water, communicating via openings 17, 18, with further chambers connected with passage 28 via openings 25. The passage 28 is preferably sustantially spiral in form, and embedded in the cushion are wires in a capacitance loop, connected to a voltage source and an oscilloscope to indicate voltage variations in the capacitance loop to measure the force being exerted on the pile by the driver. A measure of the static load bearing capacity of the driven pile may also be determined. An adaptor 26 is secured by cables against the underside of the cushion 27 and is shaped to receive a pile. The upper end of the body has a recess for the driving hammer, and lugs are provided on the side of the body for mounting in a lead frame. In another embodiment, a second cooled cushion is located in the lower recess in the body, and the driving force is measured pneumatically by sensing the pressure in a passage formed in the lower cushion.
Patent GB-711322-A (GB)
Title: Process for the production of hetero-cyclic compounds
Filed: 1952-08-13
Abstract: D 2-Oxazoline compounds of the general formul  <FORM:0711322/IV (b)/1> and <FORM:0711322/IV (b)/2> wherein R represents hydrogen, halogen or a nitro, lower (1-4 C) alkoxy or phenyl radical) are manufactured by reacting dichloroacetonitrile with an aminodiol compound of the formula <FORM:0711322/IV (b)/3> under such conditions that the D 2-oxazoline compounds produced undergo practically no hydrolysis.  The reaction is preferably carried out under anhydrous conditions (i.e. without a p  solvent or in an anhydrous organic solvent), but aqueous solvents may be employed if the reaction time and temperature are suitably controlled (e.g. 3 days at 25-30 DEG C., 24 hours at 50 DEG  C. or 6 hours at 70 DEG  C.).  The preferred reaction temperature in all cases is in the range of 20-75 DEG  C., and it is advantageous to use excess of dichloroacetonitrile.  When the erythro form of the starting material is used, the oxazoline of the second formula above greatly predominates in the product, whereas the threo form of the starting material yields approximately equal amounts of the two oxazolines, which may be separated by fractional crystallization from an organic solvent.  Examples describe the use as starting materials of: (1) D - (-) - threo - 1 - p - nitrophenyl - or DL - threo - 1 - p - bromo - or - methoxy - phenyl - 2 - aminopropane - 1 : 3 - diol; (2) DL - threo- 1 - p - nitrophenyl - 2 - aminopropane - 1 : 3 - diol; (3) DL - erythro - 1 - p - nitrophenyl - 2 - aminopropane - 1 : 3 - diol; (4) D - (-) - threo - 1 - p - nitrophenyl - 2 - aminopropane - 1 : 3 - diol; (5) DL - threo - 1 - (41 - biphenylyl) - 2 - aminopropane-1 : 3-diol.  Reference has been directed by the Comptroller to Specifications 698,542 and 704,946.
Patent GB-224011-A (GB)
Title: Improvements in or relating to tractor and trailer vehicles
IPC: B62D53/08
Filed: 1923-08-10
Abstract: 224,011. Marande, P., and Swanzy, Ltd., F. & A. Aug. 10, 1923. Compound or articulated r o a d vehicles. - Relates to six wheeled vehicles as described in Specification 210,129 in which a two wheeled trails is pivoted to the rear of a tractor and resilient means are provided for checking any tend- ARRANGEMENT &c. OF PARTS OF
Patent GB-672576-A (GB)
Title: Improvements in or relating to magnetic tape storage containers
Inventor: WHITE LEONARD ALFRED
IPC: G11B23/06
Filed: 1950-08-17
Abstract: 672,576. Magnetic recording and reproducing apparatus. STANDARD TELEPHONES & CABLES, Ltd. Aug. 17, 1950. No. 20427/50. Class 40 (ii). A magnetic tape container 9, which may be jacked into apparatus including a recording head 3 and/or reproducing head 4, is provided with tape guiding means which guide a short length or lengths of tape external to the container. When the container is jacked into position these short lengths are in contact with the heads and thus the container can be removed or inserted without any threading or unthreading of the tape from the guides. The guiding means consist of jaws 11 containing idler rollers 16 to maintain the tape in position. Rollers 16 are connected to an alarm circuit so that if the tape breaks and electrical contact is made between the rollers and jaws 11 an alarm is operated. A forward driving roller 5 and reverse roller 6 are provided against which the tape is held by rollers 17 on pivoting brackets 18. The container 9 is forced into position on spring -cradles 12 which are con-. nected by cables 27 to the brackets 18. The rollers 17 are swung outwards when container 9 is pressed down so that the jaws 11 on the container can be passed between the rollers into contact with the appropriate head.
Patent GB-243312-A (GB)
Title: Improvements in and relating to apparatus for measuring limbs
IPC: A43D1/00
Filed: 1925-08-14
Abstract: 243,312. Thiel, A., and Schmidt, W. Nov. 22, 1924, [Convention date]. Outline gauges. - An apparatus for measuring the length of a shortened limb comprises a base a upon which one foot is placed, and an upright. b in which two screws d, e are rotatablv mounted. Nuts on the screws carry cross-bars h, i, which have holes s adapted to receive pins k, l. The pins move in vertical slots in the upright and are provided with sole-plates n, o. In use, the pins are inserted in suitable holes, and the screws are adjusted until the soleplates engage the foot, the shortening of the limb being read on a chart on the upright. The parts a, b, are hinged together.
Patent GB-1466005-A (GB)
Title: Self adhesive articles
IPC: C09J7/38
Filed: 1974-05-09
Abstract: 1466005 Strippable laminates GENERAL ELECTRIC CO 9 May 1974 [29 May 1973] 20486/74 Heading B5N An article comprises a unitary coherent backing, an organopolysiloxane pressure-sensitive adhesive layer on at least one face of the backing, and a releasable anti-stick layer comprising a silanol-stopped, dimethyl-polysiloxane fluid-coated sheet on the organopolysiloxane pressure-sensitive adhesive, the adhesive comprising the intercondensation product of a mixture containing an organopolysiloxane resin and at least one alkyl and/or alkenyl aryl polysiloxane gum. The backing may be a woven glass fabric, a silicone coated woven glass fabric, a polymeric film, e.g. a polyamide, polyimide, silicone, polytetrafluoroethylene, polychlorotrifluoroethylene, polypropylene, polyethylene, an acrylonitrile - butadiene - styrene copolymer, polyethylene terephthalate or an acetal polymer, a metallic foil, e.g. of aluminium or copper or a polyethylene coated paper. The organopolysiloxane resin is defined as being a polymer containing two or more siloxane units and having the average unit formula where each R (which may be the same or different) is a C 1-8  alkyl radical, a C 5-7  ring carbon atom cycloalkyl radical, a C 2-8  alkenyl radical, a mononuclear aryl radical, a mononuclear aryl alkyl radical having 1 to 6 carbon atoms in the alkyl group, or a halogenated derivative of the above radicals, OR<SP>2</SP> is a C 1-8  alkoxy radical, s is 1À0 to 1À7, q is 0 to 1À0, r is 0 to 1À0 and the sum of q+r is 0À01 to 1À0. The polysiloxane gum preferably has the formula where each R (which may be the same or different) is a monovalent hydrocarbon radical, a halogenated monovalent hydrocarbon radical or a cyanoalkyl radical, n is at least 500, and each R<SP>1</SP> (which may be the same or different) is hydrogen, alkyl or vinyl. The anti-stick layer may comprise a backing of paper or cloth, the silanol-stopped dimethylpolysiloxane coating thereon suitably having the formula where p is an integer of from 300 to 5260. The article of the invention may be made by mixing the resin and the gum, reacting the mixture at elevated temperature, dissolving the product in an aromatic solvent, e.g. benzene, toluene or xylene, applying the resultant solution to the backing, evaporating off the solvent and applying the coated surface of the anti-stick layer to the resultant pressuresensitive adhesive. A process for applying an article coated with an organo-polysiloxane pressure-sensitive adhesive to a substrate, e.g. steel, comprises providing an article according to the invention, separating the releasable anti-stick layer from the organopolysiloxane pressure-sensitive adhesive and applying the resultant product to the substrate.
Patent GB-922342-A (GB)
Title: Means for enabling a parallel digital signal to be converted to an analogous fluid pressure or flow
IPC: F15C4/00
Filed: 1959-06-15
Abstract: 922,342. Electric selective systems. J. C. WELLS. Sept. 14, 1960 [June 15, 1959], No. 20507/59. Class 40(1). [Also in Group XXIX] A parallel digital signal is converted by a valve assembly into an analogous fluid pressure or flow signal. The valve assembly comprises a body 1 having two bores 2 and 3 supplied with liquid under pressure and each having a set of eight outlets controlled by independently actuated valves operated in accordance with a digital binary code signal to determine the pressure in the bores 2 and 3. The dimensions of the orifices are so proportioned that as each successive one is opened and the preceding one closed the resulting pressure in the chambers 2 and 3 vary in accordance with a binary progression. Each bore 2 and 3 has an additional valve controlled bleed orifice 10. The bores 2, 3 are connected respectively to control chambers 15, 16 of a spool valve 6 having an inlet 21, two working ports 22, 23 and two exhaust ports 26, 27 and the spool is biased by adjustable springs 17, 18 to a central neutral position. In one example, Fig. 6, the valves controlling the pressure in the bore 2 are operated by a parallel digital electric signal from the sensing brushes F of a punched tape reading device. The valves controlling the pressure in the bore 3 are also operated by a digital electrical signal from a feed-back transducer comprising brushes F<SP>1</SP> which sense contacts on an insulating board B and which are carried by the output member of an hydraulic motor M controlled by the spool valve 6. The biasing springs 17, 18 of the spool valve may be omitted and the chambers 15, 16 provided with additional outlets controlled by additional lands on the spool.
Patent GB-1377686-A (GB)
Title: Pressure-operable device for optionally permitting or inhibiting  movement of a movable member relative to a fixed member
IPC: F16K35/00
Filed: 1973-05-02
Abstract: 1377686 Clamps MARTONAIR Ltd 2 May 1973 [3 May 1972] 20514/72 Heading E2A [Also in Division F2]  A retaining device for an extension 5 of a piston 4 of a piston valve comprises a resilient plastics/rubber ring 9 housed in a groove 8 of a cylindrical bore 2 and gripping the extension 5. The piston 4 is released for movement by fluid-pressure admitted at 12 which fluid passes through passages 11, 10 in the extension to act on both sides of the ring to expand it. The fluid pressure acts simultaneously on the piston 4 to move it. In modifications the groove 8 is dispensed with or provided in the extension 5 and the ring is replaced by a series of resilient balls.
Patent GB-1260377-A (GB)
Title: A process for preparing ternary vinyl chloride copolymers
IPC: C08F214/06
Filed: 1969-04-22
Abstract: 1,260,377. Vinyl chloride terpolymers. PRODUITS CHIMIQUES PECHINEY-SAINTGOBAIN. 22 April, 1969 [22 April, 1968], No. 20552/69. Heading C3P. Terpolymers based on (1) vinyl chloride, (2) a vinyl ester, halogenated vinyl derivative or acrylic derivative and (3) an olefinic hydrocarbon of low molecular weight, are prepared by a bulk polymerization process comprising, in a first stage prepolymerizing under high speed agitation the whole of the vinyl chloride required or a monomer composition based on part of the vinyl chloride required, until a limited conversion of the monomer or monomer composition has taken place, then bringing the prepolymerizate into contact with the olefinic hydrocarbon and any remaining part of the vinyl chloride and carrying out, in a second stage, a final polymerization under a low speed agitation, the monomer (2) being introduced either in full at the beginning of the first or second stage or part at the beginning of the first stage and the remainder at the beginning of the second stage. The olefinic hydrocarbon may be ethylene, propylene, isobutene, butene-1 and cis and trans butene-2. The compound (2) may be vinyl acetate, vinylidene chloride, an acrylic or methacrylic ester or acrylonitrile. Polymerization catalysts used in methylphthalate solution are ethylhexyl peroxydicarbonate, acetylcyclohexanesulphonyl peroxide, and octylperoxydicarbonate.
Patent GB-318346-A (GB)
Title: Improvements in lifting jacks
IPC: B66F3/02
Filed: 1928-07-16
Abstract: 318,346. Pielhau, W., Brockhaus, J., Brockhaus, W., Brockhaus, P., Brockhaus, W., Brockhaus, H., and Brockhaus, P., (trading as Brockhaus S÷hne). July 16, 1928. Jacks.-A rack-and-pinion jack specially adapted for raising the rails of a railway track and having two geared shafts for light and heavy loads has a pedal-operated ratchet pawl device for facilitating quick lowering of the load. The load-engaging foot h is carried by a rack g which can be raised quickly by the rotation of a shaft d having a pinion f engaging with the rack. The rack can be raised slowly by the rotation of a second shaft d<1> connected by reducing gearing v to the shaft d. The shaft d' carries a ratchet wheel i<1> normally engaged by a detent pawl r<1>. A pedal lever n pivoted to the casing can be depressed to disengage the pawl from the ratchet wheel to allow a quick lowering of the load and removal of the jack, a handle c being provided for this purpose. Quick engagement of the jack with the load can be obtained by inserting a hook, which may be provided on the operating handle, through an opening s in the top of the casing and engaging an aperture t in the top of the rack.
Patent GB-731223-A (GB)
Title: Improvements in and relating to artificial limbs
IPC: A61F2/66
Filed: 1953-07-24
Abstract: 731,223. Artificial limbs. EEN, H. L., and SIMONSSON, H. O. July 24, 1953, No. 20577/53. Class 81 (2). In an artificial foot which is jointed to an artificial leg by a pivot transverse to the leg and passing through a bearing, the pivot being provided on either side of the bearing with end portions which engage supporting surfaces connected to the foot, the supporting surfaces are provided on insertion pieces which are capable of being fixed in the foot and are interchangeable. The tarsal portion of the foot 1 is provided with a joint consisting of a ball bearing 5 which rests on an interchangeable insertion piece 16 fitting into a cavity 20 in the foot. The bearing 5 is provided with a mounting bolt 6 with which it is secured to the foot by a nut 7. A pivot 9 is mounted in the bearing 5 its ends fitting into sleeve portions 14 of a yoke 10 which is secured by a bolt 11 to a fitting 12 normally attached to the leg. The sleeve portions 14 bear on supporting surfaces provided by the insertion piece 16. The insertion piece 16 is provided with a central hole 17 to enable it to be secured to the foot by the bolt 6 of the bearing 5. The fitting 12 which forms a cover for the instep presses, during walking, on rubber blocks 21, 24 in front of and behind the joint which tend to restore the foot to a normal position relative to the leg. One construction of insertion piece 16, Fig. 4, is provided with supporting surfaces which are cylindrical, coaxial with the pivot 9 and lined with a leather sheet 15. When this insertion piece 16 is used the foot is only permitted to move in a vertical plane during walking. A second construction of insertion piece 26, Fig. 5, which permits the inclination of the foot in a lateral direction relative to the longitudinal direction of the foot is provided with supporting surfaces similar to those of the first construction which are inclined downwardly from the midportion of the insertion piece. In another construction of insertion piece (not shown) the supporting surfaces are cylindrical but are formed in rubber blocks so that motion is permitted in a vertical plane parallel to the longitudinal direction of the foot, in a horizontal plane and in vertical plane at right angles to the longitudinal direction of the foot. Motion in a vertical plane parallel to the longitudinal direction of the foot as well as in a horizontal plane are permitted by the use of an insertion piece (not shown) having supporting surfaces formed with a flat rigid base and rubber side pieces. The foot is provided with a bendable toe piece 2 and a pliant sole 3.
Patent GB-598088-A (GB)
Title: Improvements in meters
IPC: G07F15/08
Filed: 1945-08-10
Abstract: 598,088. Variable-ratio intermittent gearing. STOREY, W. H. Aug. 10, 1945, No. 20578. [Classes 80(i) and 80(ii)] [Also in Group XVIII] In variable-ratio gearing, for an electricity payment meter, of the kind wherein an intermittent rotation is imparted to toothed-wheels 6, 7, carried planet-wise on a continuously rotating driving carrier 5 and engaging a driven member, not shown, by thrusting into the path of the wheels a variable number of stationary spring- detracted abutment plungers 3, 4 arranged in two separate concentric circles to co-act with the two wheels 6, 7 such thrusting is effected by applying to the projecting heads of the plungers a mask-plate 18 having two concentric rows of selectively-positioned apertures 18a, which admit the heads of those plungers which are not required to operate whilst the remainder are thrust into the operative position by the unapertured part of the mask-plate. The maskplate 18 is retained in the operative position by a snap-closed hinged cover-plate 11, on which it is located by projections 14, 15, engaging holes 19, 20 in the mask. The cover-plate has two complete concentric series of holes 12, 13, to admit those plungers which pass through the maskholes. The outer circle of abutment plungers control a pence wheel and the inner a shillings wheel, and the mask-plate may be in the form of a card bearing an indication 22 of its price-setting, exposed through a window in the cover 11. A single maskplate may carry four different complete sets of apertures rendered effective by selectively locating the plate in the cover; separate superposed plates may be used for shillings and pence, and each such plate may cover a number of values and be adjustable relatively to each other to provide any required price setting.
Patent GB-672235-A (GB)
Title: Combined guiding and anchoring mechanism for the wobble plate of a wobble plate drive
IPC: F16H23/04
Filed: 1948-08-04
Abstract: 672,235. Swash-plate mechanism. SPARMANN, E. E. K. Aug. 4, 1948, No. 20596/48. [A Specification was laid open to inspection under Sect. 91 of the Acts, Feb. 5, 1949.] Class 80 (iii). A swash-plate 3 rotatably mounted upon an inclined crank 2 is guided for lemniscate oscillation by means of a link 45 connected to a point 4 in the swash-plate plane and to a point 5 on a guiding mechanism. The point 5 is arranged on a sleeve 6 which is rotatable on a crankshaft 7 which is driven at twice the speed of the main shaft 1 of the mechanism through chain gearing 98, 78. This mechanism is modified to compensate for the obliquity of the link 45 on moving from its neutral plane by means of another crank 72 on the crankshaft 7 at a phase displacement of 90 degrees co-operating with a slide in a fixed slot 73 which cause a frame 10 carrying the crankshaft 7 to oscillate about a shaft 8 on which it is rotatably supported. The resulting movement of the point 4 is along the lemniscate curve 40.