baber/WOPTO huggingface dataset:
Patent GB-1299495-A (GB)
Title: Tetrafluoroethylene copolymers
IPC: C08F16/00
Filed: 1970-04-21
Abstract: 1299495 Tetrafluoroethylene/perfluorovinylether copolymers EI DU PONT DE NEMOURS & CO 21 April 1970 [22 April 1969] 19111/70 Heading C3P A copolymer of tetrafluoroethylene monomer and at least one perfluorovinyl ether comonomer copolymerizable therewith which is a fluoroalkyl perfluorovinyl ether, a poly ether having the formula wherein X is F or H and n is 0 or an integer from 1 to 7 or perfluoro(3,6-dioxa-4-methyl-7-octene) sulphonyl fluoride is prepared by (a) forming a solution of the monomers and a hydrogencontaining chain transfer agent in a liquid solvent which is a perfluorinated hydrocarbon, a chlorofluoroalkane in which each carbon atom is substituted by at least one fluorine atom or a chlorofluorohydroalkane in which each carbon atom is substituted by at least one fluorine atom and in which each hydrogen atom is present in a CF 2 H radical, or a mixture of two or more of these; (b) polymerizing the monomers in the solution at a temperature of 30 C. to 75 C. and at a pressure of 15 to 1,000 p.s.i.g., the polymerization being initiated with an initiator which is active at the polymerization temperature and is soluble in the solution formed in step (a); and (c) separating the reaction mixture into a fraction containing the solvent, chain transfer agent and comonomer and a fraction containing the copolymer. Preferred copolymers contain stable -CF 2 H end groups and have a volatile index of less than 25, a per cent swelling index of less than 25 and a specific melt viscosity of 1 Î 10<SP>-4</SP> to 100 Î 10<SP>-4</SP> poises. In the examples tetrafluoroethylene and perfluoropropyl perfluorovinyl ether are copolymerized in the presence of 1,2,2-trichloro-1,1,2- trifluoroethane, perfluoropropionyl peroxide, methanol and cyclohexane.
Patent GB-693011-A (GB)
Title: Improvements in and relating to dynamo-electric machines
IPC: H02K19/30
Filed: 1950-08-01
Abstract: 693,011. Synchronous A.C. machines. BRITISH THOMSON-HOUSTON CO., Ltd., and MAGGS. A. H. July 2, 1951 [Aug. 1, 1950], No. 19200/50. Class 35. The output voltage of a rotary armature synchronous machine of the type having an auxiliary commutated winding supplying D.C. field current, is kept constant by cutting away part of the armature core under the winding slots so that it is highly saturated at all load conditions. In the form shown, holes 7 are cut from the rotor laminµ leaving spokes 4 under the winding slots 6. This leaves the spokes 4 and the remaining rim 5 highly saturated. In a modification, the cut away portion is replaced by a non-magnetic spider mounted on the shaft. As shown in Fig. 3, the armature windings 11, 12, 13 and neutral point are connected through slip-rings to the three-phase mains, while the auxiliary D.C. armature winding 22 feeds the distributed field winding 25 from brushes 23, 24. The field winding may be in the form of a single phase winding or a three-phase winding as shown having two phases joined together to make a short-circuited path at right angles to the exciting axis. The brushes are shifted in the direction of rotation to utilise the armature reaction effect in stabilizing the output voltage in known manner.
Patent GB-728196-A (GB)
Title: Improvements in or relating to locking rings for use under nuts or screw-heads
IPC: F16B43/00
Filed: 1953-07-10
Abstract: 728,196. Locking nuts. RENSWOUDE, L. T. B. VAN. July 10, 1953 [July 19, 1952], No. 19204/53. Class 89(1). A locking washer 1, Fig. 4, comprises an annulus of deformable material, e.g. a synthetic resin sold under the Registered Trade Mark " Akulon ", that is thicker in the axial direction at its inner and outer peripheries than midway therebetween- The cross-section of the material between the inner and outer peripheries is symmetrical both about a line 5 passing through the centre of the material and perpendicular to the washer axis 6a, and about a line 6 parallel with the axis and lying midway between the inner and outer peripheries. When the washer is deformed by a nut 2, Fig. 2, the inner thickened periphery is squeezed against the threads of screw 7 to seal the joint, and the outer periphery is squeezed out as shown to engage the flat sides of the nut to lock it. The material of the washer is said to return partly to its initial state after deformation whereby the outer periphery grips the corners of the nut. Corrugated metal reinforcement, glass wool, asbestos or like fibrous material may be incorporated in the material of the washer.
Patent GB-731427-A (GB)
Title: Desensitized liquid explosives
Inventor: PRECKEL RALPH FREDERICK
IPC: C06B23/00
Filed: 1951-08-15
Abstract: 731,427. Desensitizing explosives. HER CULES POWDER CO. Aug. 15, 1951, No 19308/51. Class 9(2). Water insoluble liquid explosive nitric esters are desensitized by adding a water soluble, substantially non-volatile compound having at least 3 carbon atoms and a structural formula X-O (R-O)n-Y where R is an alkylene, ketoalkylene or hydroxyalkylene group having from 2 to 6 carbon atoms, X and Y are alkyl, ketoalkyl, hydroxyalkyl, acyl or oxysubstituted acyl groups or hydrogen, and n is an integer from 1 to 10, the amount of desensitizing agent being such that the sensitivity of the solution is not greater than that of a 25 per cent solution of the compound in nitroglycerine. The desensitizers may be water-extracted, and those specified are diethylene glycol, triethylene glycol, trimethylene glycol and other diols, poly-ethylene and-propylene glygols, dimethoxytetraglycol mono- and di-alkyl glycol ethers, hydroxy-ethyl acetate, bis (methoxyethyl) acetal and formal, diethylene glycol ethers and methoxyethyl acetoxyethyl ether. Ethyl centralite and nitrodiphenylamine may be present as stabilizers. Examples of explosives are nitroglycerine, dinitroglycerine, ethylene glycol dinitrate, diethylene glycol dinitrate, nitroisobutylglycerol trinitrate and 1, 2, 4- butanetriol trinitrate.
Patent GB-665237-A (GB)
Title: Continuous speed variator with a small stress of control and a high ratio variation
IPC: F16H15/38
Filed: 1949-07-22
Abstract: 665,237. Variable-speed gearing. PIGNONE SOC. PER AZIONI. July 22, 1949 [Aug. 11, 1948], No. 19324/49. Class 80 (ii). In variable-speed friction gearing comprising a non-planetary roller 8 between toric races 1, 2, the roller is journalled on a slotted member 12 pivotally carried by a pin 14 on an external cranked support 7 rotatable in a stationary member 17 about an axis 19 parallel to the axis of the shafts and passing through the centre of the roller 8, the axis 18 of the pin 14 being inclined at an angle # to the axis 19. To vary the gear ratio, the support 7 is turned about its axis 19 so as to tilt the roller 8 about its contact diameter, the roller then precessing about the pin 14.
Patent GB-981730-A (GB)
Title: Improvements in or relating to scaffolding
Inventor: BURTON JOHN
IPC: E04G7/30
Filed: 1962-05-19
Abstract: 981,730. Scaffold frames, clamps. LONDON & MIDLAND STEEL SCAFFOLDING CO. Ltd. May 15, 1963 [May 19, 1962], No. 19385/62. Headings E1S and E2B. In a scaffold frame comprising two uprights 11 and a cross member 12 having clamps 30, 31 for ledgers at the joints between the uprights and the cross member, these joints are reinforced by welding thereto a right angular member 17 forming a seat for a ledger 14. The ledger clamp comprises a curved member 29 pivoted on a member 22 welded to an upright 11 and is operated by a screw 25 aligned with the corner 19 between the uprights and the cross member. When the clamp is open the gap is sufficient to permit the ledger to be placed in it transversely of its length.
Patent GB-858629-A (GB)
Title: Improvements in and relating to envelopes
IPC: B65D27/22
Filed: 1956-06-22
Abstract: 858,629. Envelopes. LEWIS, L. G. June 3, 1957 [June 22, 1956], No. 19440/56. Class 146(2). An envelope of the kind which is not sealed for transit, comprises a rectangular portion I and four flaps, three of which 2, 3, 5 when folded in overlapping relation form a receptacle, separate from the interior of the envelope, for the reception of at least the tip of the fourth flap 4. which is retained in the receptacle solely by the facial pressure of the other flaps thereupon. To make the envelope, flap 2 is first folded over, then flap 4. Next flap 3 is folded and stuck to flap 2 along line 6. In this condition the contents can be inserted after which the flap 5 is folded and stuck along lines 7 as in a normal sealable envelope. The flap 4 remains free. In a modification one of each pair of flaps is free. Specification 28,020/09 is referred to.
Patent GB-516598-A (GB)
Title: Improvements in and relating to combined telemeters and view finders, more particularly for photographic cameras
IPC: G03B13/20
Filed: 1938-06-30
Abstract: 516,598. Finders and telemeters for photographic cameras. SCHNEIDER, J. A., and TRONNIER, A. W. June 30. 1938, No. 19447. [Classes 97 (i) and 98 (i)] A member for use in combined view-finder and telemeter systems particularly for photographic cameras, consists of two prisms a and b cemented together at a semi reflecting surface and having a concave lens surface-c ground on the sides turned towards the eye. The radius of the surface c'is less than the diagonal of the face d. An eye lens n may complete the viewfinder system and a lens i<1> and a rotatable prism e connected to the focusing adjustment of the camera objective may complete the telemeter system.
Patent GB-438339-A (GB)
Title: Improvements in or relating to electric power transmission systems
IPC: H01B7/26
Filed: 1935-07-08
Abstract: 438,339. Protective arrangements. CARPMAEL, M. H., 24, Southampton Buildings, Chancery Lane, London.-(Vereinigte Z³nder - und Kabelwerke Akt.-Ges.; Sachsen, Meissen, Germany) July 8, 1935, No. 19514. [Class 38 (iv)] To reduce inductive effects to a minimum, cross connections C between cable sheaths B<1>, B<2>, B<3>, are arranged at distances apart which become progressively smaller towards the ends of the cables. Supplementary conductors are fitted in intimate contact with the lead sheaths to increase their conductivity.
Patent GB-1389232-A (GB)
Title: Pipelines and the transport of viscous liquids therethrough
IPC: F15D1/06
Filed: 1972-04-27
Abstract: 1389232 Pipes with baffles; junction pieces; reducing surface friction SHELL INTERNATIONAL RESEARCH MAATSCHAPPIJ NV 27 April 1972 [29 April 1971] 19566/72 Headings F2P, F2G, F2R The rate of flow of a viscous liquid, e.g. oil, through a pipe-line 11 is increased by interposing an annular layer of a less viscous liquid, e.g. water, adjacent the pipe wall through an inlet piece comprising a central channel 1 having at least one inlet 3 and an exit 4 for the viscous liquid, a chamber 5 having at least one inlet 7 and an outlet 8 for the less viscous liquid surrounding the exit 4, a connecting piece 18 for connection to the pipe-line 11, and one or more resistances 16, 17 within the central channel 1 to promote a uniform flow of liquid across the channel cross-section. In one embodiment, as shown, the resistances 16, 17 are perforated plates in which the sizes of holes diminish towards the centres of the plates. In another embodiment the resistances are a pair of grids (9, 10) (Fig. 1, not shown) in which the wires of one grid are at 90 degrees to those of the other, and the connecting piece (12) is frusto-conical. In a further embodiment, the resistance comprises a series of baffles (19), (Fig. 3, not shown), extending axially within the central channel 1 to divide it into separate sub-channels (20) of hexagonal cross-section. A series of inlets (3) to the central channel may be arranged so that each inlet connects with a single sub channel which in this case extends the full length of the central channel. The central channel exit has a collar (21) of flexible material.
Patent GB-515459-A (GB)
Title: Improvements in and relating to raising steam in steam generating apparatus
IPC: F22G3/00
Filed: 1938-07-02
Abstract: 515,459. steam superheaters. SCOTT, P. July 2, 1938, No. 19685. [Class 123 (iii)] The relatively low pressure steam passed through a boiler superheater to protect it when starting up is raised in pressure after leaving the superheater by high pressure saturated steam from a boiler under load and delivered into the superheated steam main of the installation. In an installation comprising boilers 1, 4, when say a boiler 2 is starting up, the boiler 1 being already in commission, the steam passing through the superheater 6 of the boiler 2 is taken by a pipe 38 to a multistage injector or other pressure booster 16 supplied by a pipe 20 with high pressure saturated steam from the boiler 1. The steam is raised in the booster to a pressure at least equal to that in a superheated steam receiver 13, to which it passes through a pipe 14. When the pressure in the boiler delivery line 10 is equal to that in the receiver 13, a valve 42 in the pipe 38 is closed and a valve 34 in the line 10 is opened, while the delivery of high pressure steam to the injector through the pipe 20 is stopped by a valve 25.
Patent GB-280281-A (GB)
Title: Improvements in or relating to press-frames for duplicating or printing apparatus
IPC: G03B27/06
Filed: 1926-08-11
Abstract: 280,281. Harris. R., and Pictorial machinery, Ltd. Aug. 11, 1926. Printing-surfaces.-A press frame for duplicating or printing apparatus, particularly photographic step-and-repeat contact apparatus, comprises a negative or unit holder adjustably carried on a supporting member which is itself so mounted on a base member as always to occupy the same position thereon and to be readily slid on and off so that when replaced whilst carrying the negative it takes up automatically its desired setting. The frame as shown in Figs. 1 and 2 is constituted by a negative holder 10, a support 11, and base 12, the base being usually uppermost and adapted to transmit pressure to a negative 13 carried on a sheet of glass 114. The holder 10' is provided with four symmetrically disposed T- section slots 14 parallel with its ends in which work the heads of corresponding bolts 16 each having a clamp 17, 18 for engaging the holder and an inwardly directed lip 15 on the support 11. The negative can be adjusted in any position by sliding the bolts in the slots and when set according to registering marks can be secured by the nuts 19. To position the support accurately on the base 12 each end of the support is provided with a tongue 20, Fig. 3, that co-operates with a corresponding groove 21 in the base 12, and centre line grooves 22, 23, Fig. 1, on these members engage tongues 24, 25. The grooves 22, 23 may be formed in one and the same member; as shown however the groove 22 is on the support 11, Fig. 4, and the groove 23 on the base 12. The support is held in set position on the base 12 by a clamping device 30, and stops 26, 27 are providedto limit the forward sliding movement of the support.
Patent GB-1089472-A (GB)
Title: Beet harvesters
Inventor: EVERETT CHARLES VERN
IPC: A01D25/04
Filed: 1965-05-11
Abstract: 1,089,472. Root crop harvesters. INTERNATIONAL HARVESTER CO; May 11, 1965, No. 19795/65. Heading A1F. A two-row beet harvester adapted to be towed by a tractor comprises two pairs of lifting wheels 19, 19<SP>1</SP> mounted on a transversely and vertically adjustable subframe 72 which is pivotally connected by links 41, 42 to a shaft 31 rotatable abouts its own axis. Transverse adjustment of the subframe is effected by a hydraulic cylinder 73 attached at one end to a lever 78 affixed to link 41, the other end of the cylinder being adjustably mounted on a bracket 75 of the shaft 31. Vertical adjustment is effected by a hydraulic cylinder 34 connected to a yoke 32 attached to the shaft 31. The pairs of wheels are relatively adjustble by adjusting their supporting clamps 52 along cross-bar 51, and contracting or extending a telescopic bar 81. Flail assemblies 48 between the pairs of wheels are driven from the tractor p.t.o. shaft. The cross shafts of a cleaning bed (20) (Fig. 4, not shown), and conveyers 21 and (26) (Fig. 1, not shown) are also driven from the p.t.o shaft. The harvested crop is fed to a storage tank.
Patent GB-1299406-A (GB)
Title: Herbicide
IPC: A01N43/836
Filed: 1970-04-24
Abstract: 1299406 Mixed herbicides containing acid anilides BADISCHE ANILIN- & SODAFABRIK AG 24 April 1970 [26 April 1969] 19806/70 Heading A5E A herbicide comprises a mixture of (a) an acid anilide having the formula where X denotes thiocyano, halogen, the nitro group, trifluoromethyl, or alkyl radical having 1 to 3 carbon atoms, or an alkoxy radical, R denotes an aliphatic radical having 1 to 3 carbon atoms, which may be substituted by chlorine, bromine, cyano or thiocyano, R<SP>1</SP> denotes an alkyl radical having 1 to 3 carbon atoms which may be substituted by halogen or R<SP>1</SP> denotes an alkynyl radical having 3 to 5 carbon atoms, and n denotes one of the integers 0, 1, 2 and 3, and (b) a pyridazinone derivative having the formula  where R denotes a phenyl radical which may be substituted by methyl or trifluoromethyl or R denotes a cyclohexyl radical, X denotes an amino, acetylamino, methyl or methoxy radical or a NH-CO-COOR<SP>1</SP> group, R<SP>1</SP> denoting hydrogen or a methyl, ethyl or phenyl radical, and Y denotes chlorine, bromine, iodine, methoxy or methyl; or a salt thereof (preferably an alkali metal or amine salt), or (c) an oxadiazolidinedione derivative having the formulae where R denotes a m-chlorophenyl, m-trifluoromethylphenyl, 3,4-dichlorophenyl, 3- chloro-4-bromophenyl or methylphenyl radical and R<SP>1</SP> denotes a 3,4-dichlorophenyl, 3-chloro- 4-bromophenyl, 4-chlorophenyl, phenyl, 3-trifluoromethylphenyl, 3-isopropylcarbamoyl-oxyphenyl, 3 - butylcarbamoyloxyphenyl, cyclohexyl, m-ethylcarbamoyloxyphenyl, m-carboxyisopropylphenyl or m-tert-butylcarbamoyloxyphenyl radical. The compositions find particular application in protecting Indian corn, cotton or soya from weeds.
Patent GB-735400-A (GB)
Title: Improvements in and relating to the automatic voltage regulation of alternating-current generators
IPC: H02P9/32
Filed: 1953-07-17
Abstract: 735,400. Automatic voltage control systems; inductances and transformers. SOC. D'APPLICATIONS ET DE FABRICATIONS INDUSTRIELLES S.A.F.I. July 17, 1953 [Aug. 5, 1952], No. 19898/53. Classes 38 (2) and 38 (4). In an automatic voltage control system for a synchronous alternator the field of which is excited over a rectifier from an A.C. exciter generator; the field of the exciter is itself excited over a rectifier and a controlled saturable reactor from a 600 c.p.s. Supply derived from an auxiliary winding in slots in the pole shoes of the exciter. The reactor 20, Fig. 1, has opposed control windings 10, 11, energized over rectifiers 14, 15 from the output of the main alternator 1 via a saturated inductance 16 and a resistance 17 respectively. The inductance 16 and resistance 17 are arranged to pass equal currents when the alternator voltage is at the required value. The windings 10, 11 control the current supplied from the auxiliary winding 6 to the exciter field 5 via rectifier 13, reactor windings 9, 9<SP>1</SP>, and a self-saturating winding 12. The exciter in turn supplies the field 2 of of the main alternator over rectifier 3. An alternative device for producing the control voltages from the alternator voltage consists of a three-limbed magnetic core, Fig. 3, one limb 36 of which is reduced cross-section so as to be saturated, and provided with a winding 33 connected to the alternator, a winding 34 connected to rectifier 14 to produce the linear output, and windings 31, 32 connected in series to the rectifier 15 to produce the non- linear output. In a modification, Fig. 4 (not shown), the winding 34 is omitted, the linear output being obtained from winding 32, and the non-linear from winding 31.
Patent GB-1042083-A (GB)
Title: Panels for the construction of acoustic false ceilings and process for their production
IPC: B29C67/00
Filed: 1964-05-13
Abstract: 1,042,083. Laminates; corrugating. SOLVAY & CIE. May 13, 1964 [May 13, 1963], No. 19911/64. Headings B5A and B5N. [Also in Division E1] False ceilings are formed from corrugated plastics material, the upwardly facing channels of which are filled with sound-absorbing material 5, Fig. 3, the bottoms of these channels being pierced by apertures such as slots. 3, Fig. 4, the upper walls of the downwardly facing channels being pierced by openings 4 which can be used for fixing and which may also allow passage of ventilating air. Optionally, the upper surface of the material may be covered by an impermeable film 6 of plastics, paper or metal, which can be pierced adjacent selected openings 4 to provide any desired amount of ventilation. The corrugation 7 along one edge may be of reduced height to facilitate overlapping of adjacent corrugated elements forming a ceiling. The sound-absorbing material may be of glass wool, rock wool or cellular plastics, and may be prevented from passing through the slots 3 by a simple porous sheet placed over these slots or by forming the sound-absorbing material as wads surrounded by fine tissue or thin paper. In a process for forming the corrugated, perforated sheets of plastics material, a sheet of softened plastics material is passed between two parallel axes of a device in which rotatable discs in groups of three are mounted on said axes, the middle disc of each group being mounted on one axis to penetrate between the other two discs of the group mounted on the other axis, each group of three discs serving the purpose of preforming a rib 2, Fig. 1, of the corrugated sheet, the sheet then passing continuously between two complementary moulds, for example rotary moulds which may be either furnished with or followed by a cooling system. The perforations on the sheet may subsequently be formed by a punch.
Patent GB-415253-A (GB)
Title: Improvements in and relating to ploughs, cultivators and harrows
IPC: A01B63/26
Filed: 1933-07-14
Abstract: 415,253. Implements for working land. REID, E., 176, Thames Street, Oamaru, Otago, New Zealand. July 14, 1933, No. 19918. [Class 6 (i).] The beam of a reversible disc plough, which is convertible into a mouldboard plough, a cultivator, and a harrow, is detachably, pivotally, rotatably, and adjustably attached to a wheeled frame and is adapted to be raised vertically by the operation of a single lever and subsequently automatically reversed without the team or tractor being stopped and without the ploughman having to leave his driving or operating position. The wheels 2 and a member 3 carrying a double angle-iron member 5 are adjustable along the axle 1. The inclination of the member 5 is adjustable by means of a bellcrank lever 8 linked to the draught pole 12, which passes through a guide bracket 11 and is pivotally connected to a member 13 adjustable along the axle by means of a lever. A plough beam 7 fits between the angle bars of the member 5 and has a pin 7A adjustably located in a guide 5D by pins 5E. It carries a plough disc 16 adjustably mounted on its laterally inclined rear end, and may be raised by means of a foot-lever 20A pivoted in a double seat support 17. The lever 20A is connected by a chain 21 to a projecting bracket 22 on the beam 7, so that the latter turns on its axis when raised above the member 5. When the lever 20A is released the beam falls in a reverse position, turning over being facilitated by a weight on an arm on the beam. A flap 19, which normally locks the beam in position, is movable by means of a trip lever. The beam 7 may be replaced by a reversible beam carrying coulters and left and right hand shares and mouldboards. A cultivator frame 26, Fig. 5. carrying spring tines 27 may be pivotally connected to the axle by half-bearings 26c and bolts 26D and connected by brackets 26F to the beam 7 from which the disc and weight have been removed. The frame 26 may be connected below the beam 7 with the tines 27 replaced by straight doubleended harrow tines which are perforated to allow of adjustment.