baber/WOPTO huggingface dataset:
Patent GB-944307-A (GB)
Title: Continuous lactam polymerisation process
Inventor: GEE KENNETH HENRY
IPC: C08G69/18
Filed: 1961-06-07
Abstract: A process for the production of polyamides comprises carrying out the following steps in a continuous manner: heating a mixture of at least one monomeric lactam having at least six carbon atoms in the ring with an alkaline polymerization catalyst and a catalyst promoter at a temperature above the melting point of the polymer of said lactam, extruding through a die the product obtained when its viscosity is at or near its maximum value, cooling the extrudate to a temperature below said melting point and maintaining the cooled extrudate at a temperature that is between 60 DEG  and 15 DEG C. below said melting point for a period of time which is at least sufficient to cause the polymer formed to become non-tacky. Specified lactams are e -captolactam, oenantholactam, capryllactam, dodecanolactam, a -methyl-e -caprolactam, b :d -dimethyl-e -caprolactam and b -phenyl-e -caprolactam. Specified catalysts are alkali and alkaline earth metals and hydrides, complex hydrides, amides, hydroxides, oxides, alkoxides, carbonates and organo-metallic derivatives thereof and Grignard reagents. Specified calayst promoters are organic isocyanates, e.g. p-phenylene diisocyanate, acid chlorides e.g. terephthaloyl chloride, acid anhydrides e.g. phthatic anhydride, N-carboxy-amino acid anhydries e.g. glycine N-carboxy-anhydride, amides e.g. N:N.diphenyl formamide, sulphonamides e.g. N:N-diphenyl-p-toluene sulphonamide and compounds of the formula R.X.C(:Z).Y.R1 where R and R1 are hydrocarbon residues and X, Y and Z are oxygen, sulphur or -NR11- where R11 is a hydrocarbon residue or hydrogen, many such compounds are specified, examples being dimethyl carbonate, N-methyl ethyl carbamate, 1-methyl-3-ethyl guanidine, dibenzyl imino carbonate, 1-ethyl-3-phenyl-urea, 1:3-dimethyl thiourea, O-ethyl-N-phenyl-isourea, ethyl S-butyl xanthate, N-phenyl S-methyl thiolcarbamate, N-ethyln-butyl-dithiocarbamate, N-ethyl-S-phenyl isothiourea, N-phenyl O-methyl-thioncarbamate, methyl dithiol carbonate and diethyl trithiocarbonate. The example describes the preparation of a polyamide from e -caprolactam in the presence of sodium and diethyl carbonate.
Patent GB-1476681-A (GB)
Title: Checking the authenticity of documents
IPC: D21H21/48
Filed: 1974-05-09
Abstract: 1476681 Security paper DASY INTER SA 9 May 1974 [11 May 1973 6 June 1973 10 April 1974] 20587/74 Heading D2B [Also in Divisions B5 B6 and G4] A document is authenticated by embedding in at least a portion thereof a predetermined number of ferromagnetic particles per unit area of the document or portion thereof, the ferromagnetic particles having been formed by providing a fibrous substance with a coating of ferromagnetic material, the number of ferromagnetic particles per unit area of the document or portion thereof classifying the document. The fibrous substance may be organic e.g. cotton fibres, plastics, or carbon fibres. The ferromagnetic material may be Fe, Co, Ni, a chrome-Ni alloy or chromium-nickel dioxide. The coating of ferromagnetic material may be applied galvanically, or by vapour deposition, spraying, dipping, or printing, and may cover a part or the whole of the fibrous substance. The ferromagnetic particles may be incorporated into paper during its manufacture, and may be arranged therein in strips. Fibres coated with a non-magnetic metal e.g. Al, Sn may be located between strips of the ferromagnetic particles so that there is no optically recognizable difference. The ferromagnetic particles may be aligned vertically to the plane of the paper.
Patent GB-416169-A (GB)
Title: Improvements in tie rods for aircraft
IPC: B64C3/00
Filed: 1933-07-21
Abstract: 416,169. Rod strainers. BREEZE CORPORATIONS, Inc., 24, South 6th Street, Newark, New Jersey, U.S.A. July 21, 1933, No. 20588. Convention date, July 23, 1932. [Class 45.] Tie rods for aircraft are secured and adjusted in tension by means comprising a coupling member F, and a sleeve 12 surrounding the rod and screwing into the member F. The ball head 9 of the rod seats in the end of the sleeve, the bore of which decreases at the end adjacent the end of the rod. The extent to which the sleeve should be screwed in is denoted by flats 14, and the device is locked by a nut screwing on the sleeve or by a sleeve 18 having an opening 19 to fit the flats and having its end bent over at 21. In modification that part of the sleeve which projects from the member F is reduced in diameter and carries a locknut.
Patent GB-130257-A (GB)
Title: Improvements in and relating to Rollers for Straining Paper or other Pulp.
Inventor: CLARK ROBERT WILLIAM
IPC: D21F1/60
Filed: 1918-12-11
Abstract: 130,257. Clark, R. W., Brown, C. W., and Buxton, G. H. Dec. 11, 1918. Dandy rolls. - To remove the water from the interior of rollers used for straining paper or other pulp, the hollow axle a of the roller is provided with hollow arms or scoops d with open ends turned nearly at right - angles, as shown, so that as the roller rotates the water is discharged through the axle and away from the roller. The invention is shown applied to a roller of the kind described in Specification 126,913.
Patent GB-1168123-A (GB)
Title: Measuring System for Infra-Red Energies
IPC: G01J5/42
Filed: 1967-05-03
Abstract: 1,168,123. Measuring bridge circuits; measuring infrared radiation. OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES. May 3, 1967 [May 31, 1966], No.20629/67. Headings G1A and G1U. A system for measuring very low energies from an infrared source 1 incorporates a pneumatic infrared radiation detector 3 having a capacitance 32 which depends on the energy passing through its window 31, a low frequency (rotating disc) modulator 2 positioned between the source and window, an oscillator 51 delivering relatively high frequency to energize a tuned Schering bridge having the capacitor 32 in one of its arms and arrangements incorporating a tuned circuit 47, 48, amplifiers 52, 53 and demodulator 54 for deriving from the bridge an output signal having a direct current component and a low frequency component at the frequency of the low frequency modulator. The direct component from the demodulator 54 is fed back via amplifier 6 and used to control a resistive arm 41 of the bridge to balance the bridge to zero output at the low frequency, thus eliminating the effects of thermal drift. The control arrangement incorporates a thermistor 5 whose heater 520 receives the D.C. signal to vary the thermistor resistance 510, which is in parallel with the arm 41. The low frequency component from the demodulator 54 passes via amplifier 7 and demodulator 8 to provide the system output at 9.
Patent GB-1025550-A (GB)
Title: Improvements in or relating to aiming mechanisms for gun barrels
IPC: G02B23/10
Filed: 1964-05-20
Abstract: 1,025,550. Lighting apparatus. ERNST LEITZ G.m.b.H. May 20, 1964 [May 22, 1963], No. 20703/64. Heading F3C. Aiming mechanism for gun barrels comprises a range-finder for determination of the angle of elevation and a sighting telescope mounted on the gun support and which has at least one movable optical element in driving connection with the gun barrel. The range-finder is coupled to a device which serves to insert into the aiming mechanism an angular elevation correction factor in respect of the ballistus of the projectile. In one embodiment a pivoted mirror 3 of the sighting telescope is in driving connection through shaft 2, differential gear 21, shaft 24 and electromechanical conversion gear 25 with the gun barrel 23. The mirror 3 is rotatable to bring the target image into location upon an index plate 15 by driving mechanism through pinion 17. The range finder is formed as part of the telescope by optical elements 7, 8 which are mutually displaceable by member 9 to vary the magnification and bring the target image into coincidence with the index upon the index plate 15. The adjustment by the member 9 is transmitted by means of a cable 34 to a slide 29 carrying an inclined control member 28 on which is displaceable a roller 27 on an arm 26 fixed to sun wheel 18. Movement of the slide 29 causes rotation of the sun wheel 18 which alters the elevation of the barrel through planet wheels 20 and sun wheel 19. The inclination of the control member 28 is altered by cams 30, 31 according to the projectile used. In another embodiment adjustment of member 9 moves a slide 29 which causes the index plate 15 to move vertically, the mirror 3 then being rotated to bring the target image into coincidence with the index.
Patent GB-478803-A (GB)
Title: Improvements in or relating to automatic reels for flexible electric conductors
IPC: H02G11/02
Filed: 1937-07-27
Abstract: 478,803. Spring - drum apparatus. DADINA, P. L. July 27, 1937, No. 20771. [Class 78 (ii)] A spring-drum apparatus for taking up slack in flex supplying an electric iron 4 is housed in an apertured casing 8 clamped to the table 9. The flex is secured at or near the middle in such way that the portion 6 leading to the wall plug 7 winds on to and off from a portion 5 of the drum of smaller diameter than the portion 2 on which the portion 3 of the flex leading to the iron is wound. The direction of winding is such that as one portion winds the other unwinds.
Patent GB-1362761-A (GB)
Title: Nuclear fuel rods
IPC: G21C21/02
Filed: 1972-05-04
Abstract: 1362761 Fuel elements BELGONUCLEAIRE SA and CENTRE D'ETUDE DE L'ENERGIE NUCLEAIRE 4 May 1972 [4 May 1971] 20771/72 Heading G6C A nuclear fuel rod comprises a stainless steel casing 1 closed at one end by a plug 2, in which plug is formed a pressurization channel 3 closed at its inner end by a metallic membrane 4. The plug 2 is welded to the casing 1 along a seam 5, and the membrane 4 is welded to the plug 2 along a seam 6 around the periphery of the plug. The rod, closed at the other end and filled with fuel, is placed in a welding chamber and air is removed by means of a vacuum pump. The chamber is subsequently filled with helium at atmospheric pressure and the plug 2 located on the casing 1 and welded thereto. The rod is then introduced into a pressurizing chamber which is purged before admitting helium at a pressure of 40 kg/cm.<SP>2</SP> The helium at this pressure fractures the metallic membrane and thus opens the channel in the plug allowing helium under pressure to enter the rod. The channel is then closed by localized fusion of the surrounding metal by means of the TIG welding method. Alternative fusion methods include plasma welding, resistance welding and laser welding.
Patent GB-266998-A (GB)
Title: Improvements in web threading devices for rotary printing machines
IPC: B41F33/00
Filed: 1926-08-23
Abstract: 266,998. Hoe & Co., Ltd., R., (Hoe & Co., Inc., R.). Aug. 23, 1826. Registering webs.-For threading webs to the printing-couples of rotary machines the couples are driven at slow speed, and the web is guided to the couples by plates 13 curved at their ends 17 which extend nearly to the lines of contact of the cylinders, and act as hand-guards to prevent injury to the hands of the operator. The plates 13 are supported by arms 14 on a supporting shaft 15, and the web is pushed over the plate to start the feed.
Patent GB-516499-A (GB)
Title: Improvements in and relating to the control of liquid cooling systems of internal combustion engines
IPC: F01P7/16
Filed: 1938-07-14
Abstract: 516,499. Fluid-actuated valves. SAUNDERS VALVE CO., Ltd., and SAUNDERS, P. K. July 14, 1938, No, 20889. [Class 135] [Also in Group XIII] In an internal combustion engine having a sealed cooling system, liquid flows through a bye-pass tube 1 while the radiator inlet 3 is controlled by a butterfly valve 4 actuated by the pressure of the liquid on a diaphragm 6 acting against a return spring 9 and opening on the other side to a sealed chamber 8.
Patent GB-1455103-A (GB)
Title: Electrode grid for lead storage batteries
IPC: H01M4/73
Filed: 1975-05-16
Abstract: 1455103 Electrode grid for lead storage battery VARTA BATTERIE AG 16 May 1975 [25 May 1974] 20928/75 Heading H1B An electrode grid for a lead storage battery comprises an expanded metal support 1 for the active material, a frame 2 formed of a lead wire having an aluminium core, and a lug 4 formed by the ends of the wire. An additional reinforcing loop or loops 3 of lead wire with an aluminium core may be provided, the ends of which form part of the lug 4. The grid may be made of a Pb/Ca alloy (e.g. comprising 0À05% Ca, 0À65% Sn, 0À5% Hg) and the core of the lead wire may be made of a high strength Al/Mg alloy; the cross-section of the wire may be circular, rectangular or trapezoidal. It is stated that the grid of the invention results in a weight reduction of 30% and a conductivity improvement of 62%, and the grid lends itself easily to automated manufacture. The grid may be used as the negative electrode in a lead storage battery.
Patent GB-460222-A (GB)
Title: Improvements in or relating to methods of modulating carrier waves, particularly for television and like purposes
IPC: H04N5/40
Filed: 1935-07-23
Abstract: 460,222. Television; valve modulating circuits. BROWN, A. J., and BAIRD TELEVISION, Ltd. July 23, 1935, No. 20931. Drawings to Specification. [Classes 40 (iii) and 40 (v)] A plurality of non-overlapping signals such as the picture and synchronizing signals of a television system modulate a carrier wave passing through an amplifier at different stages of amplification. Preferably, the synchronizing signals modulate a stage preceding that at which the picture signals are introduced. In the embodiment described, the grid voltage of push-pull amplifier stages is modulated in known manner.
Patent GB-202652-A (GB)
Title: Improvements in processes of manufacturing rubber articles to avoid vulcanisation as one of the steps
IPC: C08K3/30
Filed: 1923-08-17
Abstract: 202,652. Wills, H. S. Aug. 17, 1922, [Convention date]. Latex, treating; plastic composiiions containing india-rubber and cement. - Latex is mixed with an equal weight of Portland cement made fluid with water; the mixing is coagulated and rolled into lace crepe; the latter is then dried at a temperature below 160‹ F. and is finally rolled into sheets or moulded under pressure to form articles. The product is not vulcanized.
Patent GB-276653-A (GB)
Title: Improvements in storage tanks for gases and volatile liquids
IPC: B65D90/30
Filed: 1927-08-10
Abstract: 276,653. Wiggins, J. H. Aug. 30, 1926, [Convention date]. Hinges. - The flexible roofing members of a storage tank for gases or volatile liquids are connected to a peripheral ring 11 pivoted to the side wall of the tank by means of split rings 12 which are connected to the ring 11 and pass through a flange 13 on the side wall. The flange 13 carries bearing members 14 on which the rings 12 rock. The joint between the ring 11 and side wall is rendered gas-tight by means of a flexible member 15 of lead or fabric.
Patent GB-360495-A (GB)
Title: Improvements in or relating to means for suspending axles from vehicles
IPC: B60P3/04
Filed: 1930-07-12
Abstract: 360,495. Road vehicle suspensions ; animal - carrying vehicles. CLARKE, C. V., 171, Tavistook Street, Bedford. July 12, 1930, No. 21170. [Classes 108 (i) and 108 (ii).] The wheels are mounted on short separate axles so that the floor of the vehicle can be located below the wheel centres, the axles being carried by frames which are connected by links to leaf springs secured to the framework and are provided with upstanding extensions connected to additional springs. The suspension points lie over or substantially over the wheel tracks. In the construction shown in Figs. 4 and 5, a suspension for two tandem wheels 1 includes a frame 3 carrying stub axles for the wheels and having its ends bent 'round or fitted with brackets 4 for the attachment of links 5, .6 connected to laminated springs 7 lying substantially in the plane containing the wheel track. Side tilting of the wheels is prevented by bars 11, extending vertically from the frame 3 and carrying at the upper ends brackets 12<1> secured to plate springs 12 which are in turn connected to the frame of the vehicle at the points 13, 14. In a modification a single wheel is similarly mounted. The supports for the upper springs may be secured to the body by inclined bracings 20. In a vehicle constructed, as shown in Fig. 2, with a low floor, as used particularly for cattle and horses, a tail board which may serve also as an inclined platform giving access to the interior is provided with retaining clips 23 each having a hinged jaw which enables the clips to be turned quickly over the edge of the tail-board and then clamped in position. Specification 306,997, [Class 79 (iii), Motor vehicles, Arrangement &c. of parts of], is referred to.
Patent GB-835266-A (GB)
Title: Improvements relating to nuclear reactors
IPC: G21C1/00
Filed: 1956-07-09
Abstract: 835,266. Nuclear reactors. GENERAL ELECTRIC CO. July 9, 1956 [July 8, 1955], No. 21196/56. Class 39(4). A homogeneous or heterogeneous nuclear reactor and heat exchanger are housed together within the same pressure vessel with the coolant system. The coolant is circulated by convection and after leaving the reactor, moves up a central duct after which it flows downwards, through the heat exchanger tubing, to the reactor, which may be situated either below the heat exchanger or inside the duct. As shown, Fig. 1, the reactor 12 is mounted beneath the heat exchanger 32 in the pressure vessel 10. The coolant fluid, which may be molten metal or salt, or water follows the path indicated by the arrows. Heat is removed from the exchanger by water applied at 40. The reactor is controlled by the hydraulically adjusted rod 50. In an alternative embodiment (not shown), the lower compartment is spherically shaped and contains liquid fuel, which may be an aqueous solution of uranyl sulphate or a molten mixture of salts or metal alloys such as uraniumbismuth. Part of the liquid fuel flows upwards through a central duct and circulates back to the fuel chamber to act as a coolant, as in the first embodiment. The liquid fuel may be replenished from an external circuit and the fuel chamber may be spaced from the pressure wall by a reflector.
Patent GB-504007-A (GB)
Title: Improvements in screening or sifting apparatus
IPC: B07B1/22
Filed: 1938-07-18
Abstract: 504,007. Sifting-apparatus. SNOWDON, H. A. July 18, 1938, No. 21236. [Class 117] Rotary screens consist of reticulated sections pivoted at their trailing edges and free at their leading edges so as to swing inwards at the top part of their rotary movement for the purpose of clearing the meshes. In a preferred form, the screen is pentagonal in shape and consists of five frames 3 carrying mesh material and pivoted at their longitudinal trailing edges 5 to lugs 7 on end spiders 1. Angled plates 8 attached to the pivoted edges of the frames form supporting abutments for the leading edges of the adjacent frames. Stops in the form of rubber collars 9 on the axis 2, discs about the centre of the spiders or stops on each of the spider arms may be provided to limit the inward movement of the sections and impart a jarring effect thereto. Preferably, the parts are disposed so that a dropped section as 3a acts as a detent for the succeeding section 3b until it reaches the top of the movement.
Patent GB-1429283-A (GB)
Title: Overhead projector
IPC: G03B21/132
Filed: 1974-05-14
Abstract: 1429283 Overhead projectors G RITZERFELD 14 May 1974 [27 June 1973] 21278/74 Heading G2J An overhead projector comprises a housing 15 having a transparent top 6 to support transparent originals and containing a light source 10, heat shield 8, Fresnal lens 7 and blower 5; intake and exit openings 1 for the air current generated by the blower 5 being provided on the same side of the housing, and the blower and air guides 3, 4, 12, 13, 14 being arranged so that the entering and exiting air currents are kept separate from one another, the Fresnel lens 7 being disposed in the entering current and the light source 10 in the exiting current. A column 18 supports the projection head (not shown). Preferably the intake and exit openings are provided by a common grating 1 divided by two guides 3, 13. Preferably the heat shield 8 comprises two parallel plates.
Patent GB-464559-A (GB)
Title: Improved foot- or other ball game device
IPC: F01N1/00
Filed: 1936-07-31
Abstract: 464,559. Table games. BRENNE, E., and KOCH, C. July 31, 1936, No. 21317. Convention date, Aug. 1, 1935. [Class 132 (ii)] Apparatus for playing a ball game (football, hockey, or hand-ball) in which the playing board a has pairs of contacts c each pair being adapted to be bridged electrically by the ball e to actuate an associated ball-projecting device, is characterized in that each projecting device is moved electromagnetically. This movement is substantially horizontal. Between each pair of contacts c is a slot in which moves horizontally a plate f carrying a figure b representing a footballer and attached to the tubular core g of the electromagnet d. This core is guided on a fixed rod h and is moved against a spring i when the magnet is energized by the ball e bridging the correlated contact pair c. The plate f is not wide enough to bridge its contact pair. The use of the apparatus for a certain time may be governed by coin-freed mechanism.
Patent GB-1131306-A (GB)
Title: Improvements in or relating to the separation of liquids
IPC: B01D17/02
Filed: 1965-05-20
Abstract: 1,131,306. Separating liquids by settling. G. J. RIGBY. 19 Aug., 1966 [20 May, 1965], No. 21319/65. Heading B1D. A settling vessel for separating two liquids of different density (not shown) has a lower outlet 11 into a vessel 10, which has two outlets 14, 17 for the heavier and lighter liquids. Initially valve 18 is closed and the heavier liquid drains through vessel 10, but as the liquid interface falls in vessel 10 float 19, enclosed in guide cage 21, falls with it to close orifice 14. Valve 18 is then opened to discharge the lighter liquid. Priming ducts 22, 24 may be provided to facilitate re-lifting of float 19 to begin a new cycle. An air vent 13 is shown. The apparatus is used to prevent waste of aromatic oils after they have been treated by contact with water.