baber/WOPTO huggingface dataset:
Patent GB-1237342-A (GB)
Title: Electric protective circuits
IPC: H02H3/087
Filed: 1970-01-14
Abstract: 1,237,342. Protective arrangements. NATIONAL CASH REGISTER CO. 14 Jan., 1970 [24 Jan., 1969], No. 1799/70. Heading H2K. A protective circuit for a load 12, e.g. a transistor under test, comprises a first switchable device, e.g. a controlled rectifier 140, connected without series resistance across the load, a second switchable device, e.g. a controlled rectifier 22, connected in series with the load and the first device and a current sensing circuit 16, 66, 80 which in the event of excess current conditions applies a signal to first operating means 126, 134, 136 to cause the first switching means 140 to conduct and short-circuit the load without delay, and a signal to second operating means 113, 146, 152, 154, 160, 164 which with a time delay cause the second device 22 to cease conducting. Inductors 17, 19 may be provided to limit the current when the rectifier 140 conducts. The supply to the load 12 is switched on by operation of a manual switch 26, Fig. 2, to energize a relay 28 which closes contacts 42, Fig. 1, to discharge a capacitor 52 through the gate circuit of the rectifier 22 to cause the rectifier to conduct, current through a resistor 62 and a diode 60 from a source 50 thereafter maintaining the rectifier conducting until in the second operating means a controlled rectifier 160 is rendered conducting to discharge a capacitor 164 through the rectifier 22 to stop it conducting. Should the switch 26 be held closed, hunting does not occur due to the need for contacts 42 to be opened before the capacitor 52 can recharge. The time delay between the conduction of the rectifier 140 and the non- conduction of the rectifier 22 is provided by a capacitor 146 which charges when a transistor 113 is rendered conducting, the capacitor 146 discharging through a transformer 154 when charged to a level sufficient to render a negative resistance device 152 conductive. Normal inter. ruption of the supply to the load is effected on release of the switch 26 and the consequent deenergization of relays 28, 38 causing the release of their contacts 44, 46, 48 in such a manner as to simulate an excess current condition.
Patent GB-453935-A (GB)
Title: New or improved methods of, and apparatus for use in, the heat-treatment of metals and alloys
IPC: C21D9/663
Filed: 1935-01-19
Abstract: 453,935. Metal heating furnaces. BIRMINGHAM ELECTRIC FURNACES, Ltd., and ROBIETTE, A. G. E., Tyburn Road, Erdington, Birmingham. Jan. 19, 1935, No. 1832. [Class 51 (ii)] The method of annealing metals which consists in subjecting the work, prior to annealing proper, to a preheating treatment for the drying off of moisture and the vaporization of lubricant, is carried out in a furnace provided with a fan a for circulating the furnace atmosphere through the work chamber b and the space between the latter and an enclosing bell g, this latter space being filled with a charge f of readily oxidizable material which, on account of its proximity to the heating elements e is raised to a higher temperature than the work in the chamber b. The charge f may consist of loosely packed small pieces or wire mesh made of an easily oxidizable alloy and is so arranged that it may, when spent, be readily removed and replaced by a fresh charge. In operation, the vapours evolved during the preheating treatment are vented to atmosphere by opening the valve c<1> in the pipe c ; when annealing temperature is reached, the valve c is closed and any remaining moisture or lubricant is removed from the circulating gas by the material f.
Patent GB-329623-A (GB)
Title: Improvements in or relating to talking machines and processes for recording and reproducing sound
IPC: G11B7/00
Filed: 1929-01-19
Abstract: 329,623. Prisner, S., and Wender, E. Jan. 19, 1929. Optical records and apparatus.-Sound is re. produced from a continuous closely spaced spiral trace of varying optical characteristics inscribed upon a photo-sensitized surface carried by or formed upon a disc, by exploring said record with a light beam of small area (which, however, embraces more than one turn of the sound trace), enlarging said beam after reflection from or passage through the disc, and projecting a portion of the beam containing one turn only of the sound trace upon a photo-electric cell associated with an electro-acoustic system. As shown in Fig. 1, the record is made on the disc 6 by a spot of light from a source 4, reflected by a mirror 5 after passage through a valve 3<a> operated, through a lever 3<c> and diaphragm 3<b>, by an electromagnet 3<a> in the circuit of an amplifier 2 connected to a microphone 1. The disc 6 is rotated by a turntable 7, and means (not shown) are provided to cause the spot of light to travel in its mean path along a spiral on the disc. The record 6 may be of large size, in which case a smaller record is made therefrom by means of a reducing camera. These smaller or " playing " records may be of metal and may have sound traces on both sides. The reproducing apparatus, Figs. 2 and 3, comprises a tube 11 carrying two sources of light 9 for concentrating their beams on a small area of the record 6. and an optical system for picking up the reflected beam and throwing an enlarged image on a screen 12 with an aperture or graded light filter 13, which allows the light from one sound trace only to reach a photo-electric cell 14.
Patent GB-1535453-A (GB)
Title: Vehicle seat with adjustable back-rest
IPC: B60N2/22
Filed: 1977-01-18
Abstract: 1535453 Adjustable backrests DAIMLER-BENZ AG 18 Jan 1977 [29 Jan 1976] 01941/77 Addition to 1470578 Heading A4J [Also in Division E2]  In the embodiment disclosed by Figures 1 and 3 of the Parent Specification, the two pinions 13a, 13b meshing with the racks 15a, 15b are connected by a transverse shaft 13, said shaft 13 being connected via a reduction gearing 12, 11 to a handwheel 10 at the side of the backrest. The backrest is locked by brake discs 19, 20 releasable against a spring-bias 24 on depression of a knob 21. A spring element 17 biases the backrest towards the vertical (arrow 26).
Patent GB-507511-A (GB)
Title: Improvements in or relating to electron discharge tubes
IPC: H01J43/08
Filed: 1938-01-20
Abstract: 507,511. Cathode-ray tubes ; electronmultipliers. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Jan. 20, 1938, No. 1944. Convention date, Feb. 27, 1937. [Class 39 (i)] In electron discharge tubes, particularly those in which an electron multiplier is incorporated, electrons emitted from an extended surface 7a, Fig. 3, are focused on to a collecting electrode system of substantially smaller size than and remote from the emitting surface by an electron lens consisting of a tubular or conical electrode 29 and an apertured disc accelerating electrode 27, maintained at potentials which give rise to a succession of equipotential surfaces m of progressively decreasing curvature. The inner surface of the electrode 29 may be secondary electron emissive and constitute the first electrode of a multiplier comprising T-shaped hollow multiplying electrodes 31, 33 and a collecting electrode 37. One application described is to a photo-sensitive relay tube, Fig. 1 (not shown), in which a hemispherical photoelectric layer is deposited on the bulb or on a separate plate and the lens system and multiplying electrodes are housed in the neck of the tube on an axis perpendicular to the layer. Fig. 4 shows the application to a television transmitting tube, comprising a mosaic 12 mounted on a plate 16, and a source 6 of cathode rays with the usual control element 8 and first and second anodes 10, 20, by which the mosaic is scanned. Two or more collecting and multiplying systems A, B are mounted in branch extensions, each comprising the disc electrodes 24a, 24b, the collecting electrodes 26a, 26b and the multiplying electrodes 28a, 30a, 32a and 28b, 30b, 32b, the output electrodes 34a, 34b being connected in parallel to the grid 38 of an output amplifier valve 42. The operating potentials are supplied by a potential divider P, P<1> to the negative end of which the gun control grid 8 is connected and to the positive end of which the common lead 34 of the output electrodes 34a, 34b of the multiplier systems is connected through a circuit including an impedance 36. The disc electrodes 24a, 24b are separately connected to the source P by leads 44a, 44b, relative adjustment of which controls the quantity of secondary electrons passing into the separate multiplier systems and gives control of shading and background effects. The axes a, b of the entrances through which the electrons enter the multiplier systems are disposed to form with the normal g to the mosaic angles of from 30 to 50‹ and preferably 40‹.
Patent GB-938426-A (GB)
Title: Process for preparing products of high molecular weight by polymerization of formaldehyde
IPC: C08G2/00
Filed: 1960-01-19
Abstract: Formaldehyde is polymerized by introducing it into an inert liquid vehicle in which solid material is suspended to serve as polymerization initiator.  Titanium trichloride, polymeric materials, compounds of a metal or of a metal halide with hydrogen, a hydrocarbon radical, an oxyhydrocarbon radical, a halohydrocarbon radical, a thiohydrocarbon radical or an acyloxy radical; aluminium, aluminium oxide or hydroxide, hydrated aluminium oxide, aluminium alloy, a mixture of aluminium and aluminium alloy, and sulphur are disclaimed as the subjectmatter of Specifications 766,629, 857,321 and 868,899.  The materials claimed in Specifications 938,427 and 938,428 are also disclaimed.  The formaldehyde is introduced into the suspension at a rate which is so controlled that no formaldehyde escapes from the suspension.  Colouring materials, e.g. cadmium red, pulverulent fillers, e.g. "Aerosil" (Registered Trade Mark), pulverulent coal and carbon black, ground asbestos, ground wood, paper and sodium chloride are specified solid materials while pentane, hexane, heptane, decane, cyclopentane, cyclohexane, methyl cyclohexane, decahydronaphthalene, benzene toluene and xylene as well as halogenated or nitrated hydrocarbons, ethers, nitriles and acetals are specified inert vehicles.
Patent GB-1178115-A (GB)
Title: Improvements in and relating to Superconductors
Inventor: BARBER ANTHONY CLIFFORD
IPC: C22C27/02
Filed: 1966-03-21
Abstract: 1178115 Super-conductors IMPERIAL METAL INDUSTRIES (KNYOCH) Ltd 18 Jan 1967 [27 Jan 1966 21 March 1966 10 June 1966] 12240/66 1981/67 and 1984/67 Divided out of 1178114 Headings H1A A5 and A4D A composite electrical conductor is produced by mechanically working at an elevated temperature a super-conductor element and a "normal" conductor to provide a sub-assembly of a superconductor filament in and bonded to a matrix of normal material, placing a plurality of the subassemblies CS in a container T of "normal" conductive material and again working the assembly at an elevated temperature. The super-conductor may consist of niobium, or nioboum alloyed with titanium, zirconium and hafnium. Interstitial elements such as carbon, oxygen, nitrogen and hydrogen may be included. The "normal" material may consist of copper, aluminium, silver, indium or cadmium. The mechanical working may be effected by extruding, drawing or rolling and one material may be cast around the other. The working may be effected at between 250 and 450C. Details of other heat-treatments are given.
Patent GB-722665-A (GB)
Title: Soluble cutting oil
Inventor: OATHOUT JOHN DAVID
IPC: C10M173/00
Filed: 1953-01-23
Abstract: A soluble metal-working oil composition comprises mineral lubricating oil containing minor proportions of a sulphurized fatty oil, an oil-soluble metal naphthenate and/or a metal salt of petroleum sulphonic acid, and a partial fatty acid ester of sorbitan or the polyoxyethylene derivative thereof, in which the fatty acid radical contains 12-22 carbon atoms.  The polyoxyethylene radical contains 2-20 oxyethylene groups.  Partial esters specified are the mono-, di-, and tri-oleates and stearates of sorbitan and the polyoxyethylene tri-oleates and tri-stearates of sorbitan.  Sodium naphthenate and sodium or calcium petroleum sulphonate are specified. The sulphurized fatty oil may contain 6-20 per cent. weight of sulphur and sulphurized sperm oil is referred to.  Optional ingredients mentioned are pure oil and alcohols such as isopropanol and ethylene glycol; small amounts of water and free acid may also be present.
Patent GB-243194-A (GB)
Title: Improvements in or relating to joints for the windscreens of vehicles
IPC: B60J1/04
Filed: 1925-01-23
Abstract: 243,194. Hemming, R., Hemming, H., and Hemming, E. Jan. 23, 1925. Pivoting adjustments.- A frictional locking-device for the joints of windscreens comprises a movable element c which is hinged or pivotally attached at c' to the fixed pivot rod b and is adapted to be forced into engagement with the outer movable barrel a<1> carried by the screen by means of a pin d which screws into the rod b and engages with the end c<3> of the locking element. In the modification shown in Fig. 4, the locking element does not extend beyond the end of the rod b. Specification 112,564 is referred to.
Patent GB-571368-A (GB)
Title: Improvements relating to the clarification of liquids
IPC: C13B20/12
Filed: 1943-02-08
Abstract: In the clarification of liquids, such as beers, wines, sugar juices, fruit or vegetable juices or white water from paper manufacture, a fibrous pectate sol is added to the liquid and converted into a gel coextensive with the liquid, the gel being allowed to flocculate and precipitate.  A fibrous pectate of an alkali metal, ammonium or an alkaline organic base is preferably used.  The fibrous pectate may be prepared as described in U.S.A. Specification Re 21077 or, after mild treatment with sodium carbonate, the pectinous material may be repeatedly leached with hydrochloric acid and the pectic acid so formed subsequently converted to a pectate.  The pectate gel is usually one of calcium pectate produced by the calcium salts contained in the natural products.  Compounds of other polyvalent metals may also be used, particularly in non-food applications of the process.  Any deficiency of the calcium, &c., compounds must be made up by addition of the required amount.  In examples, (1) .4 gram of fibrous sodium pectate pulp dispersion is mixed with 1 litre of sugar cane juice, (2) 315 parts of coarsely screened orange juice is mixed with 582 parts of 13 DEG  Brix sugar syrup and 49 parts of a 5 per cent. sol of fibrous sodium pectate is added while stirring, (3) orange juice is diluted with twice its volume of water and small quantities or calcium chloride and fibrous pectate sol added successively, (4) 1 part of a 2.5 per cent. dispersion of fibrous pectate pulp is mixed with 300 parts of white water. Specifications 538,461, 539,620, [Group V], and 555,089 are referred to.
Patent GB-1486511-A (GB)
Title: Pcm regenerators
IPC: H04L25/06
Filed: 1975-01-17
Abstract: 1486511 Data transmission; pulse regenerators SIEMENS AG 17 Jan 1975 [10 April 1974] 2073/75 Heading H4P A regenerator for bipolar signals has an amplitude decision device producing respective outputs in response to polar inputs of above a given level, and further output pulses in response to either polarity input, with a time decision device comprising two bi-stable devices, e.g. JK flip-flops set alternately by the further output pulses plus pulses of a timing train, each device being reset in response to a pulse at one of the respective outputs thus regenerating input signals. Input signals, which may be passed through a distortion correcting device (not shown) are applied through centre tapped transformer EU to bases of transistors TI, T3 whose base potential is determined by divider C1, R1 voltage stabilized by diodes D1-D3; emitters of T1, T3 are commoned to T5, which transistors comprise the amplitude decision device; the operating point of T5 is set by R4, R5. At inputs below the operating point, T5 is conductive and T1, T3 are blocked whereas above the operating point, T1 or T3 becomes conductive with T5 blocked. Collectors of T1, T3 are connected transistors T2, T4 respectively so that with input pulses lower than the operating point, a 1 appears at gates Gl, G2, or, if any input pulse exceeds the point a 1 is given by transistor T6 to flip-flops F1, F2, and a 0 by transistor T2 or T4 dependent on input polarity, i.e. a unipolar train regenerated in terms of amplitude is produced by T6 and specific polarity trains are produced by T2, T4. One of flip-flops Fl, F2 is set and the other reset alternately by timing pulses at input IV i.e. at the centre of each input pulse and T6 supplies the J inputs with an amplitude regenerated unipolar train for time decision. Bit width pulses are produced at Q outputs; a second (faulty) identical polarity input pulse will be suppressed hence will not initiate a pulse at the output. In a modification (Fig. 2, not shown) a capacitor and diodes (C3, D4, D5) form a circuit to provide an output proportional to input voltage peak on (RS) to an automatic line distortion correction device (not shown), or in a further modification (Fig. 3, not shown) a resistor (R11) feeds such output to transistor T5 where it alters the level of the operating point. The arrangement is stated to be suitable for I.C. techniques and may be arranged in push pull configuration.
Patent GB-214007-A (GB)
Title: Improvements in signalling devices for tramway and like systems
IPC: B61L23/22
Filed: 1923-01-23
Abstract: 214,007. Smith, L. H. Jan. 23, 1923. Electromagnetic switches. - In a signalling system for tramways having single-line sections in which signals at both ends of the section are operated by a car entering the section to show that the section is occupied, and are reset by the car when leaving the section, the signal circuits are controlled by an armature 22 pivotally mounted between opposed electromagnets 19, 26, and having contacts 21 (preferably metal) adapted to co-operate with fixed contacts 20, 36 (preferably carbon). The armature is retained in its contact-making positions by a roller 37 on the armature engaging one or other of two recesses 38 in a rocking plate pivoted at 84 to a pivoted arm 40 adjustably urged towards the armature by a spring 42. The rocking movement of the plate is limited by stops 85, 86. The circuit arrangements are such that contacts 21, 36, normally closed, are included in the circuit of magnet 19 which is energized by a trolley contact as a car enters the section to throw armature 22 to the left, Fig. 2. Contacts 21, 36 are thus opened, and contacts 20, 21 closed to complete a lighting circuit, not shown, through signal lamps at the ends of the section. As the car leaves the section, a second trolley contact is made, thus energizing magnet 26, to return armature 22, and break the signal circuit. Each magnet 10, 26 has a pair of coils in parallel.
Patent GB-1291923-A (GB)
Title: Sheet material package
IPC: B65D83/08
Filed: 1970-01-15
Abstract: 1291923 Film containers MINNESOTA MINING & MFG Co 15 Jan 1970 [16 Jan 1969] 2106/70 Heading G2A [Also in Division B8] A roll 16 of sheet material, which may be light-sensitive, is housed in a hollow cylindrical tube 22, and its leading end extends through a narrow slit 14 in the tube wall. This end is folded to lie first over the tube surface along one side of the slit, and then back so as to lie (as at 30) wholly over the slit. A covering strip 20 (e.g. of aluminium foil having a pressure-sensitive adhesive coating on one face) has a greater width than the folded flap 30, and is also longer than the tube 22. Thus when strip 20 has been placed in position, the slit 14 is securely sealed against light and moisture. When the roll is to be dispensed, the strip 20 is grasped and pulled away. The adhering flap 30 tears along the fold, so that there is still enough of the sheet 16 extending through the slit for it to be grasped and pulled out further. The roll 16 is wound on a hollow core 28, which is supported by embossed hubs 27 formed on the closure plates at each end of the tube 22.
Patent GB-1399173-A (GB)
Title: Electrical connector unit
IPC: H01R/
Filed: 1973-01-16
Abstract: 1399173 Terminal blocks AMP Inc 16 Jan 1973 [9 Feb 1972] 2142/73 Heading H2E A box-like housing 29, made of insulating material, is formed with deep opposing blind slots 15 in opposite walls, into which conducting contact strips may be inserted. A projection 19 on one side of each slot, and a shoulder 16 on the opposite side, retain the strips by snap action, the housing being sufficiently resilient to allow the contact member to be forced past the projection. The contact strips may have transverse legs 32 which may be used in addition to the arms 31 for connection to other conductors.  Successive housing may be linked together by lugs 25 engaging correspodning recesses in adjacent units.
Patent GB-469005-A (GB)
Title: Improvements in and relating to a method of and apparatus for manufacturing helices
IPC: B21D11/06
Filed: 1937-01-25
Abstract: 469,005. Coiling helices. FELTEN & GUILLEAUME CARLSWERK AKT.-GES. Jan. 25, 1937, No. 2200. Convention date, Jan. 25, 1936. [Class 83 (iv)] In a winding. machine the helices are wound over a conical mandrel dis. placeable axially tc preserve uniform outside diameter of helix with varying wire diameter. A mandrel 1 is displaced axially by hand when wire 4 of varying diameter fed from a spool 3 on a rotating carrier 2 is coiled on a conical end of the mandrel. Pins 6 guide the helix.
Patent GB-353845-A (GB)
Title: Improvements relating to the manufacture of solid rectifiers for alternating electric currents
IPC: H01L21/16
Filed: 1930-01-22
Abstract: In order to produce a rectifier of the copper oxide type which shall be capable of withstanding comparatively high voltages, for example from 10 to 20 volts per disc, a disc of copper or an alloy of copper with zinc or other metal is heated to a temperature just below its melting-point in an oxidizing atmosphere for a predetermined period. For copper, the temperature required is from 1000-1025 DEG  C. and the heating may be continued for about 8 minutes.  The unit is then cooled to room temperature for about 4 hours at a uniform rate.  The oxide may then be removed from a portion of the surface in order to make contact with the copper. Another portion may be reduced to metallic copper by contact with a reducing liquid or gas, such as ethyl alcohol, to provide a contact for the other terminal, or alternatively a contact disc of soft metal such as lead or tin may be pressed into contact with the oxide surface.  A rectifier having a lower resistance in the conductive direction may be made by heating a disc of copper or copper alloy to about 1005 DEG  C. for about 8 minutes, transferring to an environment at a temperature of 490 DEG C. for about 2 1/2 minutes, and then optionally cooling in air for from two to three minutes.  The units are then quenched in water at room temperature.
Patent GB-965475-A (GB)
Title: Electrical contact strips
Inventor: CLEWES ANTONY BRASHER
IPC: H01R9/24
Filed: 1962-01-22
Abstract: 965,475. Terminal boards and blocks. CARR FASTENER CO. Ltd. Dec. 14, 1962 [Jan. 22, 1962], No. 2265/62. Heading H2E. An electrical contact unit comprises a base of resilient plastics material 2, Figs. 6 and 7, having a contact plate 8, mounted upon it and attached by an integral rivet 9, the unit being formed with male and female coupling elements 7, 4. Two units may be joined by snapping the ears 7, of one, into the recess 4 of the other to build up a contact strip, Fig. 9. A thread in the contact receives screws 10 to secure connections, adjacent contact plates being isolated from one another by a tapered barrier wall 6. A separate end unit 12, Fig. 8 (not shown), comprises a pair of male elements only to allow the strip to be secured to a support.