baber/WOPTO huggingface dataset:
Patent GB-654018-A (GB)
Title: Improvements in or relating to ice skates
IPC: A63C1/30
Filed: 1948-10-15
Abstract: 654,018. Ice skates. SORBY & SONS, Ltd., R., and DAVIDSON, P. B. Oct. 15, 1948, No. 26823. [Class 132 (i)] An ice skate blade has a row of teeth at its forward end with their tips in a straight line lying at an angle within the range 30 degrees to 70 degrees, and preferably 45 degrees to 55 degrees, to a line approximately parallel to the length of the blade and tangential to the approximate mid-point of the running edge of the blade. All the teeth may be bar or cross teeth and one or both the end teeth 7 and 8 may be different from the rest e.g. bar teeth or pyramid teeth at either end of a cross tooth rake. The rearmost tooth may be shorter than the rest.
Patent GB-706518-A (GB)
Title: Method of obtaining chain nuclear reactions releasing atomic energy
IPC: G21C3/58
Filed: 1951-11-15
Abstract: 706,518. Nuclear reactors. MAGNASCA, Ltd., and HANSEN,F. Nov. 15, 1951 [Nov. 21, 1950], No. 26834/51. Class 39(4) A chain reaction is produced by bombarding one element in the presence of a second element with protons, neutrons or alpha particles the elements being chosen so that particles emitted by the first element react with the second element to produce particles which in turn react with the first element. Li in a mixture of LiF and Al powders is bombarded with protons from a 100,000-volt positiveray tube and the alpha particles from the (p,2a) reaction produce an (o,p) reaction with A1. Both reactions are exothermic. Proportions of 30 per cent A1 and 70 per cent LiF are preferred.
Patent GB-685963-A (GB)
Title: Improvements in or connected with bedsteads, divans, and the like
Inventor: MYER EWART HUMPHREY
IPC: F16B12/60
Filed: 1950-11-03
Abstract: 685,963. Furniture joints. MYER & CO., Ltd., H. Oct. 30, 1951 [Nov. 3, 1950], No. 26846/50. Class 52(ii) A leg 5 for an inverted L-shaped bed frame having rounded corners 2 comprises a head comprising a flat top 5a to fit against the flange 2a of the bed frame, a face 5d to fit against the vertical flange 2b, and an aperture 6 terminating in bevelled faces 5c, 5e. A threaded bolt 4 secured to the bed frame at the rounded corner projects downwardly, passes through the aperture 6 and is provided with a washer 7 and nut 8 to secure the leg 5 in position.
Patent GB-673550-A (GB)
Title: Improvements in means for launching aeroplanes and other flying bodies
IPC: B64F1/10
Filed: 1949-10-19
Abstract: 673,550. Launching aircraft. VICKERS-ARMSTRONGS, Ltd., and WALLIS, B. N. Nov. 13, 1950 [Oct. 19, 1949], No. 26851/49. Class 4. Aeroplane launching apparatus comprises a carriage which may be propelled along the take-off runway and which supports the aeroplane with freedom to assume the attitude of flight, the aeroplane being locked to the carriage until the lifting force developed exceeds the take-off weight by a predetermined margin, release mechanism being operated automatically when such excess lift has been maintained continuously for a predetermined period. As shown the aeroplane 19 is supported on the carriage by a column 20 carried by a duplex parallel linkage 21, 25, to enable the machine to be raised or lowered without affecting its attitude, and the aeroplane may swivel about the column 20 so that its longitudinal axis lies along the relative wind. The locking and release mechanism may be as described in Specification 673,551, in which a detent on the aircraft is engaged by a latch on the carriage, a bolt loaded by compression springs being associated with the latch and moved to release the latch when the lift generated by the aircraft exceeds its weight by an amount equal to the loading of the springs, the necessary time delay being obtained by a dashpot arranged to ensure that the release movement of the bolt occupies a predetermined minimum period. The carriage shown is provided with flanged wheels 15 to enable it to run along guide rails, clips 30 which engage the heads of the rails preventing the carriage from leaving the track. Jet propulsion units 18 are mounted on a rear transverse member 14 connecting side booms 10, 11 which serve as fuel tanks. The supply of fuel to the propulsion units may be cut off and brakes 29 applied automatically when the aeroplane is released, for example by the operation of trip mechanism when the locking bolt is released. Instead of running on guide rails the carriage may be provided with self contained steering apparatus for operation from a remote point. The apparatus may be used for testing purposes, a mechanism being provided to prevent operation of the bolt release mechanism when the carriage speed reaches the value necessary to produce the predetermined excess lift.
Patent GB-773040-A (GB)
Title: Improvements in lead-base solder alloys
IPC: B23K35/26
Filed: 1955-09-20
Abstract: A lead-base solder alloy consists of Pb at least 87.0 per cent and Cd and In, the percentage by weight of the In being at least 1.0 but less than that of the Cd.  This alloy has a melting point about 245 DEG C. and good wetting characteristics in the liquid state.
Patent GB-634924-A (GB)
Title: Process for the synthesis of ketones of the vitamin a series
IPC: C07C403/00
Filed: 1946-09-06
Abstract: Ketones of the vitamin A series are obtained by reacting compounds of the general formula R=X-Ac, in which R is the b -ionylidene group or a group which may be easily converted to the b -ionylidene group, X stands for the group =CH-CH=CH- and Ac is a carboxyl group or a functional derivative thereof, with a reactive organo-metallic compound capable of introducing an alkyl group.  An example is given of the preparation of a ketone (C18) by condensing b -ionylidene crotonic acid with methyl lithium.  In addition there may be used alkyl magnesium halogenides as the organo-metallic compound. Specification 634,925 is referred to.  Samples have been furnished under Sect. 2 (5) of the C18 ketone prepared by using ionylidene crotonyl chloride and dimethyl cadmium and of the C20 ketone prepared from b -ionylidene crotonic acid using propyl chloride and lithium. b -Ionylidene crotonic acid is obtained by the condensation of b -ionone with methyl g -bromocrotonate under the influence of zinc, followed by the saponification of the dehydrated ester.  Dimethyl cadmium is obtained by treating methyl magnesium bromide with cadmium bromide.  The Specification as open to inspection under Sect. 91 comprises the manufacture of ketones from starting materials in which X is an unsaturated hydrocarbon group containing a carbon chain in which double bonds are arranged in such a way that a continuous series of double bonds exists between those in R and the one in the C=O group, and also includes additional examples describing (1) the production of the C16 ketone by condensation of b -ionylidene acetonitrile with methyl magnesium bromide; (2) the preparation of the C18 ketone by condensation of p-ionylidene crotonitrile with methyl magnesium bromide; (3) the preparation of the C18-ketone by condensation of b -ionylidene crotonamide with methyl magnesium bromide; (4) the preparation of the C21 ketone from vitamin A acid using methyl lithium.  This subject-matter does not appear in the Specification as accepted.
Patent GB-1253936-A (GB)
Title: Organopolysiloxane coupling agents for epoxy resin composite articles
IPC: C03C25/40
Filed: 1970-06-04
Abstract: 1,253,936. Laminates. DOW CORNING CORP. 4 June, 1970 [1 July, 1969], No. 26982/70. Heading B5N. [Also in Divisions C3 and D1-D2] Laminates comprise an epoxy resin and glass cloth or fibres which have been first treated with an aqueous dispersion of a copolymer consisting of (A) 33-86% by wt. of C 6 H 5 (CH 3 ) SiO units, and (B) 14-67% by wt. of R 2 N-A-SiO 3/2  units in which R is H, a C 1-6  alkyl radical or a C 2-6  aminoalkyl radical and A is a C 3-10  alkylene radical; the N atom of the R 2 N- group is attached to at least the third carbon atom of the A radical removed from the Si atom. The polymers may also be used as their salts with fatty acids, e.g. those containing 1-8 carbon atoms. Exemplified aqueous dispersions are the acetates of (1) a copolymer containing 50% C 6 H 5 (CH 3 )SiO units and 50% units and (2) a copolymer containing 80% C 6 H 5 (CH 3 )SiO units and 20% units. In an example glass cloth is dipped into an acetate dispersion as set out above and dried to obtain a siloxane copolymer pick-up of 0À3%. Laminates were then prepared by impregnating the treated glass cloth with epoxy resin and laying up a 12-ply laminate with the warp threads rotated 90 degrees in alternate plies. The laminate was cured at 100‹ C. for 30 minutes/2À11 kg./sq. cm. to form a sheet of thickness 0À035 cm. and containing 30% by wt. of cured epoxy resin.
Patent GB-279089-A (GB)
Title: Improvements in electric interlocking machines for railway signalling
IPC: B61L19/06
Filed: 1927-10-12
Abstract: 279,089. Telefonaktiebolaget L. M. Ericsson. Oct. 14, 1926, [Convention date]. Hand-levers and hand-gearing, interlocking.- In a locking frame in which hand-levers are interlocked solely by an electromagnetic locking mechanism, the circuit for which is dependent upon contacts on conflicting levers, and contacts on apparatus such as points or signals and contacts controlled by trains on the track, the movement of a lever can be completed only after the locking device has been de-energized in preparation for the return movement. The drawing shows a lever spindle 1 controlled by two electromagnets 8, 9 each controling an armature 6, 7 coacting with two locking discs 2, 3, 4, 5. The circuits to the electromagnets are controlled by a contact 16 closed by axially sliding the handlever, contacts 17, 18, 19 on conflicting signal and points levers and a contact 20 opened by a train when over the points. Contacts 21, 22 are closed by the points in the extreme positions. Contacts 10, 11 are operated by the rotation of the lever. Both magnets 8, 9 are normally deenergized. To reverse the points, the hand lever is moved to close the contact 16 and energize magnet. 8. The armature 6 then frees the tooth 25 and the lever can be rotated until the armature engages the tooth 27. In this position contact 10, 13 is made and the magnet 8 is energized so long as the contact 21 is closed. Armature 7 locks the tooth 26 until magnet 9 is energized. On reversal of the points, the lever can be moved further until armature 7 engages tooth 28; the magnet 9 is de-energized by axial movement of the lever and the lever can then be rotated to its extreme position. The last locking action by the armature 7 and tooth 28 ensures that the magnet 9 is de-energized in order to be prepared for control of the next movement to the normal position.
Patent GB-533090-A (GB)
Title: Improvements relating to the repair of rubber mudwings for vehicles
IPC: B29C73/10
Filed: 1939-10-04
Abstract: 533,090. Bonding rubber to flexible material. DUNLOP RUBBER CO., Ltd., WILLIAMS, R. E., and MADGE, E. W. Oct. 4, 1939, No. 27198. [Class 70] [Also in Group XXXI] Damaged rubber mudguards are repaired by securing thereto a patch of flexible material reinforced by inextensible and inflexible metallic elements spaced apart therein, the patch being so positioned that the metallic elements extend substantially at right angles to the joint or line of the tear. In the form shown, a patch 4 applied across a tear 3 in the mudguard consists of two superposed layers of rubberized canvas between which are arranged a number of spaced heavygauge steel wires 5, which extend across the line of the tear 3. The patch is secured by means of a self-vulcanizing solution containing indiarubber. The patch may be cut from a continuous length of fabric containing metallic reinforcements arranged in groups, the lengths of the reinforcements in the different groups being varied if desired.
Patent GB-679927-A (GB)
Title: Improvements in or relating to ship-handling systems and methods of ship-building
Inventor: LEYLAND RALPH
IPC: B63B9/00
Filed: 1949-10-25
Abstract: 679,927. Slipways. NORSEMAN (POINT WHARF), Ltd. Oct. 35, 1960. [Oct. 25, 1949] No. 27363/49. Class 68 (ii). A slipway for launching and hauling up ships broadside on comprises a number of parallel sets of rails 1 along which trucks 2 supporting the ship travel in unison. The rails and trucks may be of the rack-andpinion type. The slipway is formed with two horizontal portions on different levels connected by an inclined portion. Transverse rails 7 extending between transverse platforms 11 are traversed by other trucks 8 to and from which the ship can be transferred from and to the trucks 2, all the trucks being provided with two-part cradles operated by hydraulic jacks. The rails are of L-section with one flange horizontal and the other vertical. The wheels of the trucks are unflanged but are engaged by the vertical flanges of the rails. Only the vertical flanges are interrupted at the intersection of the rails 1 and 7. Ship-building stations 3 ... 6 may be provided.
Patent GB-157066-A (GB)
Title: Improvements in and relating to vehicle covers
IPC: B60J1/08
Filed: 1920-09-25
Abstract: 157,066. Baehr, G. Jan. 14, 1920, [Convention date]. Wind - screens.- The Specification as open to inspection under Sect. 91 (3) (a) describes a vehicle wind-screen comprising three panels hinged together with the middle one capable of being turned down about a horizontal axis to position A. Fig. 8. This subjact-matter does not appear in the Specification as accepted.
Patent GB-381326-A (GB)
Title: Improvements in or relating to duplicating machines
IPC: B41J15/24
Filed: 1931-10-01
Abstract: 381,326. Typewriters &c. WADE, H., 111, Hatton Garden, London.-(United Autographic Register Co. ; 5000, So. California Avenue, Chicago, U.S.A.) Oct. 1, 1931, No. 27387. [Class 100 (iv).] Web-feeding and guiding arrangements.- In duplicating-machines in which expansible register pins are disposed near the front end of the platen for registering superposed stationery forms, treadle-operated means are provided for registering and tensioning the forms and for drawing them backwards after erasure, and also for actuating the platen. The typewriter C, Fig. 1, runs on the side members A<2> of the platen frame. The platen B can be depressed by the system of levers 13 operated by a rod 14 and treadle 15. A paper-clamping device comprises an end cross-bar 12 bolted to the frame and a bar 20 mounted on the lever 19 which is part of the system 13. A split pin is formed by projections 26a, 27a on members 26, 27, the member 26 being fixed to the cross-bar 12, while the member 27 slides on it and is drawn towards the member 26 by springs 30. Rollers 31, mounted on the member 27, run on cam edges 19a mounted on the lever 19, so that, as the clamping-bar 20 is raised, the pin contracts. The tensioning-device comprises a bar 48 and a clamping-member 50, mounted on plates 39, Fig. 8, and normally retracted by springs 47. The plates 39 are drawn forward by the operation of the treadle, acting through levers 46, 44, and the clamping-member 50 is simultaneously raised by the action of a cam 51 and roller 52. The paper web H<1> passes over a roller 66, between guide plates 65, and over a roller 55 to the bar 48 and the platen. Bearings 55a of the roller 55 slide in J-shaped slots 35b in the plates 35 and in the inactive position lie in the lower ends of the slots. Cam plates 60 slidably mounted on the side plates and normally drawn forward by springs 62, can be urged backwards by moving the typewriter to the rear end of the frame when it engages projections 60d on the plates 60 ; the roller 55 is thereby raised by the cam edge 60c out of the lower part of the slot 35b and is then drawn back by springs 56, thus engaging and drawing backwards a loop of the paper webs H. By depressing the treadle, bars 20, 50 are raised and the paper may be lifted off the pins, drawn forward, and a new set of register holes placed over the pins. When the treadle is released the pins expand, thus aligning the webs, the clamping-bar 20 descends, and the web is then tensioned by the descent of the bar 50 and the rearward motion of the plates 39 ; or the web may be drawn back after erasure by actuating the cam plates 60.
Patent GB-152330-A (GB)
Title: Radiator for motor cars and the like
IPC: F28D1/053
Filed: 1920-09-27
Abstract: 152,330. Lamblin, A. Oct. 8, 1919, [Convention date]. Plate apparatus.-A series of parallel hollow plates H are connected to a central rear chamber I and to side chambers D, F extending the whole depth of the radiator, so that the hot water is admitted uniformly to the interior of the plate elements either from the side chambers F, as shown, or from the central chamber, and circulates by gravity only. The plates are spaced apart by tubes L extending from the front to the rear, air thus being free to pass between the plates and through the tubes. The plates are secured to the chambers by soldering, and may be disconnected by unsoldering the joints. The radiator is secured within a casing by a flange N on the filling-plug B, and by bolts M. Modifications are described in which the hollow plates are curved upwards, or pointed upwards or downwards at the centre. A form suitable for stationary engines or slowmoving vehicles is shown in Fig. 10. The plates H are inclined upwards from the front to establish a. natural flow of air through the radiator.
Patent GB-501301-A (GB)
Title: Process of treating tars, fuel oils and bitumens
IPC: C10C3/02
Filed: 1937-10-09
Abstract: 501,301. Mixing-apparatus. HODSMAN, H. J. Oct. 9, 1937, No. 27508. Addition to 471,216, [Group V]. [Class 86] [Also in Groups V and III] A plant for mixing tar and other materials consists of a heating vessel 1 provided with stirrers 3 for the tar which is then pumped down a conduit 5 into which is supplied from hoppers 9 lime, water, tar, pitch, oil or bitumen, and into a mixer 6 containing stirrers 10, 12, of which the blades 10 drive the material downwards, blades 12 drive it upwards and stationary blades 13 promote turbulence. After reaction the material is run into a vessel 7 and a trough 8 from whence it passes to a stone coating plant.
Patent GB-1510115-A (GB)
Title: Laminate film for use in vacuum packaging
IPC: B65D75/58
Filed: 1974-06-20
Abstract: 1510115 Laminated films W R GRACE & CO 5 June 1975 [20 June 1974] 27514/74 Heading B5N A laminate film suitable for use as a backing board film in vacuum packaging comprises in order: (a) a substrate layer of unoriented, irradiated polyethylene, oriented polypropylene or oriented polyamide, (b) an oxygen barrier layer, e.g. the hydrolysis product of an ethylenevinyl acetate copolymer containing 20-95 mole per cent of vinyl acetate units at least 85% of which have been hydrolysed, a vinylidene chloride/vinyl chloride copolymer or nitrile polymer and (c) an uppermost, heatsealable layer of a blend of an ethylene-vinyl acetate copolymer with a wax, e.g. paraffin wax. The thicknesses of the layers may be respectively 10-100 microns, 3-30 microns and 3-15 microns. The vacuum package may comprise an article enclosed between the backing board film laminate and a thermoformed panel film which are heat-sealed together, either the backing board film laminate or the panel film having at its interface with the other and near the margin of the seal of deposit of resinous material, e.g. nitrocellulose, which is non- fused and which adheres to one of the films and not the other so that the films may be pulled apart by beginning the pull at the area of the deposit. The deposit which may contain a dye or pigment, may be circular or shaped in the form of an arrow or letter of the alphabet is applied from a liquid to the film, e.g. by printing. The theremoformable panel film may be a laminate comprising a substrate of unoriented polyolefin which may be irradiated or un-irradiated, ionomeric resin, polyester, plasticized vinyl chloride or polyamide, a barrier layer, which may be an ethylene/vinyl alcohol copolymer, vinylidene chloride/vinyl chloride copolymer or nitrile polymer and a heat-sealable layer, e.g. of polyethylene or ethylene/vinyl acetate copolymer. The films may be produced by extrusion. The layers of the laminates may be bonded together using an adhesive, e.g. a polyurethane.
Patent GB-618544-A (GB)
Title: Improvements in or relating to superheterodyne receiving circuits
IPC: H03D7/18
Filed: 1946-09-13
Abstract: 618,544. Image frequency suppression. PHILIPS LAMPS, Ltd. Sept. 13, 1946, No. 27540. Convention date, Dec. 7, 1942. [Class 40 (viii)] In a superheterodyne receiver, in order to prevent the introduction of image frequency signals over the parasitic capacity 5 between the aerial coupling coil 1 and the tuned input circuit 2, 3, a neutralizing condenser 6 is inductively coupled to the coil 2 through the coil 7. In order to compensate for the small amount of image frequency voltage introduced directly through coils 1, 2, slight over- or underneutralizing may be employed according to the polarity of the mutual inductance between the coils 1, 2.
Patent GB-1106007-A (GB)
Title: Photometers
Inventor: FRENK HELMUTH
IPC: G01J1/16
Filed: 1965-06-29
Abstract: 1, 106, 007. Photo-electric photo-meters. ERNST LEITZ G.m.b.H. June 29, 1965, No. 27581/65. Heading G1A. In a double-beam null balance photo-meter light from the two beams falls alternately on a photo-detector for periods which are made to vary inversely with the intensity of the beams, and means responsive to a difference in the time periods adjusts an attenuator in one beam until the time periods and consequently the beam intensities are equal. Lamps La, and La 2  are energized alternately by a flip-flop 17, 18 to transmit a comparison beam through a neutral filter 31 and a measuring beam through an optical wedge 29 and a sample 30 respectively. The current flow produced in photo-resistor 10 by one of the two beams is integrated by a capacitor 11 and when the charge thereon reaches a predetermined level a lamp 12 ignites to discharge a capacitor 11 and transmit a pulse via a capacitor 14 to switch over the flipflops 17, 18 so that the other lamp is illuminated. The periods of illumination of the lamps La 1  and La 2  thus vary inversely with the intensity of the corresponding beams reaching the photo-resistor 10. Connected between the collectors of transistors 17, 18 is a D. C. motor 28 which responds to the collector currents so as to hunt with a net rotation shifting an optical wedge 29 so as to equalize the intensity of the beams falling on the photo-resistor. The neutral density filter 31 corresponds to the maximum absorption it is desired to measure. In a modification, Fig. 3, (not shown) the two lamps La 1  and La 2  are replaced by a single lamp and a shutter operated by solenoids connected in place of the lamps; a photomultiplier replaces the photo-resistor and a power flip-flop driven by the flip-flop 17, 18 is provided for the motor. The optical wedge may be replaced by relatively rotatable polarizers, Fig. 4, (not shown) and a mechanical counter or a potentiometer may be provided to read the position of the movable polarizer.