baber/WOPTO huggingface dataset:
Patent GB-935472-A (GB)
Title: Improvements in or relating to wide range low frequency amplifiers
IPC: H03F3/52
Filed: 1960-02-02
Abstract: 935,472. Valve supply circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. Feb. 2, 1960 [Feb. 5, 1959], No. 3671/60. Class 40 (6). In a screen-grid wide band amplifier in which a cathode bias resistor 3, Fig. 1, of relatively large value is provided in order to correct the frequency response, the grid is given a suitable positive bias by connecting it to a tapping point on a potentiometer 7, 8 between screen-grid and earth. The screen-grid is fed via resistor 4 and decoupled to the cathode by condenser 5, so that negative feedback reduces the apparent loading upon the input due to resistor 7. In one modification, Fig. 2 (not shown), the effect upon the input of resistor 8 is also reduced by connecting a condenser between cathode and a tapping point on this resistor. Instead of connecting the grid directly to the potentiometer 7, 8, a grid leak may be interposed, Fig. 3 (not shown), and a tapping point on this grid leak may be connected by a condenser to the cathode, Fig. 4 (not shown). The arrangement may be driven directly from a cathode follower, the lower arm of the potentiometer comprising a resistor 16, Fig. 5, shunted by a condenser 17; a gain-control potentiometer 15 may comprise the cathode circuit of the cathode follower, the variation of D.C. on the valve 1 being compensated by the D.C. negative feedback provided by resistors 4, 7.
Patent GB-1210871-A (GB)
Title: Transverse-current shaft kiln
IPC: F27B1/00
Filed: 1968-01-24
Abstract: 1,210,871. Shaft furnaces. KLOCKNERHUMBOLT-DEUTZ AG. 24 Jan., 1968 [23 Feb., 1967], No. 3873/68. Heading F4B. A cross-draught shaft furnace of rectangular cross-section for burning limestone, dolomite or magnesite comprises a preheating zone 2, a cooling zone 5, and burning zones 4a, 4b each having oppositely disposed plenum chambers 11 and 12 with openings 17 forming part of a hot gases circulating system incorporating an injector 9 supplied with hot air through pipe 8, a burner 14 and combustion chamber 10, excess hot gases escaping from each chamber 12 to the preheating zone through a pipe 15. Cooling air entering the cooling zone 5 is taken off as shown to heat the incoming combustion air in a recuperator 7.
Patent GB-194672-A (GB)
Title: Improvements in water purifying apparatus
IPC: C02F1/68
Filed: 1923-02-08
Abstract: 194,672. Declercq, E. March 10, 1922, [Convention date]. Solids, treating with liquids.-The Specification as open to inspection under Sect. 91 (3) (a) describes a construction of lime saturator d, Fig. 1 (Cancelled). Water from a conduit 20 is delivered tangentially into the mouth 48 of a vertical pipe 39 so that a whirling motion therein draws air with it to the bottom of the saturator d. The rising air circulates the lime at the bottom of the saturator around a cylindrical partition 40 and passes away up a tube 41. The water separates, from the lime as it rises outside the tube 41 and is discharged through pipes 45, 58 to the bottom of the treating-vessel b. Slaked lime is supplied from a tank e as required. This subject-matter does not appear in the Specification as accepted.
Patent GB-865758-A (GB)
Title: Isoprene polymerisation process
IPC: C08F36/08
Filed: 1960-02-03
Abstract: A feed stream containing a substantial amount of one or more mono-olefins is polymerized in the presence of an organo-lithium catalyst.  The feed may have been obtained by the dehydrogenation of one or more hydrocarbons having 5 carbon atoms.  The proportion of isoprene may be less than 50% by weight, while it is preferred that the reaction takes place in the absence of conjugated dienes other than isoprene.  Specified lithium compounds are n-butyl, namyl and sec-butyl lithiums.  A continuous process may be used and the product isolated using isopropanol.  Specification 813,198 is referred to.
Patent GB-1269062-A (GB)
Title: Capacitors
Inventor: REID DOUGLAS JAMES
IPC: C08L23/26
Filed: 1968-11-30
Abstract: 1,269,062. Capacitors. DUNLOP HOLDINGS Ltd. 27 Nov., 1969 [30 Nov., 1968; 23 Jan., 1969], Nos. 56950/68 and 3843/69. Heading HIM. The dielectric material in a capacitor comprises an interpolymer of ethylene, propylene and a non-conjugated polyene. The interpolymer is preferably one which may be crosslinked and may, for example, have reactive groups introduced to side chains to achieve this. The dielectric may also comprise other synthetic polymers, carbon black, ceramic material and fibrous material such as paper, in separate or mixed layers. The interpolymer may be formed in situ on an electrode strip, or the electrode material may be deposited on a preformed interpolymer film. The electrode material may be silver, gold, aluminium, silicon or germanium.
Patent GB-537721-A (GB)
Title: Improvements in railway permanent way
IPC: E01B9/58
Filed: 1940-03-01
Abstract: 537,721. Railway rail chairs. NAISBITT, W. J. March 1, 1940, No. 3854. [Class 104 (ii)] In a rail chair a pin e is driven between the angle h of the rail and a recess f in the chair jaw to prevent rail creep. The rail seating a may be cambered in the longitudinal direction of the rail.
Patent GB-433135-A (GB)
Title: Improvements in heat insulation
IPC: E01B9/28
Filed: 1934-02-08
Abstract: 433,135. Nonconducting coverings for heat ; refrigerators. MUNTERS, C. G., 35, Strandvagen, Stockholm. Feb. 8, 1934, No. 4203. Convention date, Feb. 14, 1933. [Classes 29 and 64 (ii)] Condensation of moisture within the heat insulation of refrigerator cabinets is avoided by cooling and thereby drying the air which enters the insulation. A refrigerator cabinet comprises an inner container 2 and an outer cover 3 of sheet metal, the intervening space containing insulation which may be spaced aluminium sheets 6 in a casing 5 of impregnated paper or pasteboard. Ventilating apertures 8 are formed in the casings 5 adjacent to the cold inner wall 2 so that any air which enters the apertures 8 is cooled and its moisture precipitated. The condensed water is discharged through a conduit 10. Any moisture which may reach the insulation is discharged through openings 14.
Patent GB-647013-A (GB)
Title: Improvements in graining machines for printing plates
IPC: B24B39/06
Filed: 1948-02-13
Abstract: 647,013. Graining printing plates. ZARKIN C. Feb. 13, 1948, No. 4299. Convention date, Feb. 1, 1943. [Class 60] A machine for graining printing plates comprises a tub 5 mounted for graining movement and a dumper 31 pivotally mounted for receiving the marbles or other graining elements from the tub and returning them to the tub, the dumper being operated by a hydraulic ram 44 controlled by a valve 27 having means for admitting pressure fluid to the ram and for returning the pressure fluid from the ram to a supply tank. The graining tub is supported on balls 8 and is oscillated by a diamond-shaped frame 9 operated by a crank or eccentric on a shaft driven by a belt from a motor 13. A hydraulic jack 15 tilts the tub about a pivot 6 so that the marbles fall through a hole in the bottom of the tub and are directed through a flap door (not shown) in the side of the dumper, which is then in a vertical position: For rotating the dumper to the position shown in Fig. 1, in order to return the marbles to the tub, the flap door then being closed, a shaft 32 on the dumper is connected by a lever 46 to the cylinder 44, which slides on a piston 42 pivoted on a ball-bearing mounting 43. Power for the two rams is supplied by a pump 18 driven by a belt from the main motor 13 and is controlled by two similar valves 27, 29 arranged in series. On each valve, the control handle 33 or 34 is held centrally by springs 35 and the pressure fluid flows past an open return valve 38 or 48 and back to a tank 24. When the handle 34 of the dumper control valve 27 is raised, a cam 47 closes the valve 48 and fluid flows through a check valve 50 to the ram 44, thus raising the dumper. On release of the handle, it returns to the central position and the check valve holds the pressure in the ram until the handle 34 is depressed, when a plunger 52 opens the check valve to release the pressure fluid and allow the dumper to rotate into the vertical position. The dumper may be lowered more quickly by opening a valve 54 in a pipe 53 leading directly to the tank 24. The operation of the table control valve 29 is similar to that of the valve 27.
Patent GB-1077921-A (GB)
Title: Hard metal alloy
Inventor: DUEBERL WALTER
IPC: C22C29/06
Filed: 1965-02-01
Abstract: A sintered hard metal consists of 93-94% carbides of Group IVa to VIa metals and 6-7% binder; the binder is based on the Fe group metals and contains 0.05-2.5% of one or more rare earth metals and/or Y.
Patent GB-331879-A (GB)
Title: Improvements in, and apparatus for, low temperature distillation, drying and the like
IPC: C10B1/10
Filed: 1929-02-11
Abstract: 331,879. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). Feb. 11, 1929. Carbonizing apparatus. - In apparatus for low temperature carbonizing, drying, &c. and comprising an inclined bundle of tubes s mounted rotatably around its longitudinal axis in a heating chamber a, the tubes are freely supported by one or more cooled hollow shafts h which with the tubes are mounted in a gastight manner in two end walls k, k<1> so as not to prevent them from extending longitudinally. A single hollow shaft h is attached to the end wall k, the end wall k<1> being free to move on it at j. The hollow shaft or shafts may be rigidly attached to both end walls and the tubes free to move in borings in one of them. The carbonized material falls into a drumshaped chamber attached to the end wall k<1> and rotating with the bundle of tubes. This chamber may be wholly or partly surrounded by the heating gases.
Patent GB-719451-A (GB)
Title: Improvements relating to the focussing of television cameras
Inventor: HOUCHIN JOHN PHILIP WYNN
IPC: H04N5/232
Filed: 1949-02-19
Abstract: 719,451. Focusing mechanism for cameras. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Feb. 20, 1950 [Feb. 19, 1949], No. 4582/49. Class 97(1) A television camera having, several lenses of different focal length mounted on a turret which can be moved to move said lenses selectively into position for use as the objective for focusing an image on the photo-sensitive surface of the camera, includes means so arranged that when the turret is moved to change the lens positioned for use as the objective the location of the photosensitive surface of the camera is automatically adjusted towards that required to maintain the camera focused at the same distance with the lens brought into use as with the lens previously used, as the objective. The means shown comprises a cam 29 rotatable about a pin 11 and housing three sections 30, 31, 32 corresponding to three lenses mounted on a rotatable turret 3 to which the cam is geared, and is described in conjunction with a television camera in which focussing is effected by movement of the pick-up tube 2 along the axis A-A. This camera includes a focus control handle 7 geared at 9 to slotted crank 10 pivoted at 11 and linked by a pin 13 slidable in the crank slot 14 to a rod 12 pivoted at 16 to a bridge 17 slidable on rods 20, 21 in a direction normal to axis A-A. A pin 19 on a bush 18 slidable on the arm 15 of rod 12 is connected to the pick-up tube 2 so that the latter is moved along axis A-A when handle 7 is turned. In order that handle 7 may be moved through the same distance in focusing from close-ups to infinity irrespective of the focal length of the turret lens which is temporarily in use as the camera objective, the distance of the bush 18 from fulcrum 16 is adjusted in accordance with the focal length of the selected objective by connecting the bridge 17 to a crank 23 which is engaged by a sliding rod 26 actuated by a cam, such as 28, associated with the selected lens as the latter is moved into its operative position. To prevent de-focusing during the change from one lens to another, the pin 13 is provided with a roller 33 and the rod 12 is spring urged so that it maintains contact with the cam 29. Movement of the turret to change the objective causes rotation of the cam 29 to bring a different section thereof into engagement with the roller 33 and consequently causes movement of rod 12 and thereby movement of the pick-up tube, the extent of this movement being such that the pick-up tube is maintained in focus. Reference has been directed by the Comptroller to Specification 670,581.
Patent GB-703676-A (GB)
Title: Ferromagnetic ceramic material having high maximum permeability and high saturation flux density
IPC: C04B35/01
Filed: 1952-02-21
Abstract: 703,676. Magnetic compositions. STEATITE RESEARCH CORPORATION. Feb. 21, 1952 [Sept. 28, 1951], No. 4642/52. Class 38 (2) A ferromagnetic body which may be a core for high frequency inductances and transformers consists of ferrite material incorporating the oxides of magnesium, zinc and copper. The magnesium and zinc oxides may be to the ferric oxide in a molecular proportion between 1:0.9 and 1:1.1, the copper-oxide may amount to between 1.5 per cent and 8 per cent of the weight of the material, and from 0.2 per cent to 2 per cent by weight of lithium oxide may be added. The material may be produced by heating at 2300‹F.-2400‹F., a mixture of powdered oxides to which the copper and lithium have been added as basic carbonate and carbonate respectively. Specification 671,788 is referred to.
Patent GB-1361589-A (GB)
Title: Apparatus for transmitting the rotational movement of one shaft to a second shaft separated therefrom
IPC: B60W30/18
Filed: 1973-01-30
Abstract: 1361589 Automatic speed control VDO ADOLF SCHINDLING GmbH 30 Jan 1973 [31 Jan 1972] 4650/73 Heading G3R Apparatus for transmitting the rotational movement of one shaft to a second shaft separated therefrom comprises a first pulse generator actuated by the first shaft, a D.C. motor coupled to the second shaft, a second pulse generator actuated by the second shaft, a forward-andbackward counter having forward and backward counting inputs respectively connected to the outputs of the first and second pulse generators, a resistive bridge circuit having three fixed arms and the fourth arm determined by the output of the counter and means to detect the out-ofbalance bridge voltage and apply it to drive the D.C. motor. In the described embodiment a shaft 1 rotates in dependence on the speed of a vehicle and its movement is transmitted to the drive-shaft 2 of an eddy current tachometer 3 including a mileage counter 4. The shaft 1 controls an inductive, capacitive, conductive or photo-electric pulse generator 5 whose output passes through an AND gate 6 to the forward counting input V of a five-stage binary counter 7. Resistors 13---17 are connected in respective outputs of the counter and, according to the momentary count, determine the value of resistance in the fourth arm of a bridge 18 having three fixed resistors 26, 27, 28. The bridge output is connected to an operational amplifier 19 supplying one terminal of a D.C. motor 11, the other terminal being connected to a parallel combination of an impedance transformer 20 and voltage divider 21. The motor 11 is coupled to the shaft 2 whose speed is detected by a pulse generator 9 responsive to the motor shaft 10 and supplying the backward counting input R of the counter 7 through AND gate 8. A typical operation of the apparatus is described in which pulses from the generators 5, 9 respectively unbalance and rebalance the bridge 18, until the speed of motor 11 is such that the shafts 1, 10 rotate at the same speed. To prevent maloperation during rapid changes in speed of the shaft 1 (e.g. very great acceleration or retardation), a NAND gate 22 blocks the AND gate 6 when the count reaches a predetermined value, whilst a NOR gate 23 sets a flip-flop 24 when the count reaches a predetermined minimum value to block the AND gate 8 and set the counter 7 to its normal position via element 25 and input P. The aforementioned blocking actions are respectively removed when pulses from generator 9 reach the counter 7 (after excessive acceleration of the shaft 1) and when pulses from generator 5 reset the flip-flop 24 (after excessive retardation of the shaft 1), a capacitor 31 preventing flip-flop 24 from being cleared during its resetting through the NOR gate 23.
Patent GB-739640-A (GB)
Title: Carton fittings for yarn packages
IPC: B65D71/70
Filed: 1954-02-18
Abstract: 739,640. Cartons; packaging yarn. CELANESE CORPORATION OF AMERICA. Feb. 18, 1954 [Feb. 20, 1953], No. 4784/54. Classes 18 and 94 (1). Elements for supporting yarn packages in a carton have each co-planer webs 22 joined to a central web 24 by portions 23, the webs 22 and 24 having apertures for locating the tubes of the yarn packages. Each element may be comprised of two sheets secured together, one sheet 26 having small apertures for the upper ends of the tube and the other 25 having larger apertures. A stack of elements is completed by liners 31, placed in a carton 11, and the whole bound by strapping 15.
Patent GB-873779-A (GB)
Title: Solvents for dry cleaning
IPC: D06L1/04
Filed: 1960-02-11
Abstract: Dry cleaning solvents (e.g. petrol, ligroin and other low boiling paraffins; benzene, toluene, xylene and other low boiling aromatics; carbon tetrachloride, or tri-, or perchlorethylene) contain as an "improver" an ester of a mono- or di-saccharide, e.g. glucose, sucrose, fructose, lactose, or maltose with a fatty acid containing at least 6 carbon atoms, the amount of "improver" used being 0.2-5% by weight of the goods being cleaned.  The monoesters of acids such as lauric, palmitic, oleic, tallow, and coconut acids are preferred, but higher esters may also be used.  Water in amounts of 10-50% by weight of the "improver" is generally included, and higher alkylamines may also be present to increase the wetting power of the water.
Patent GB-557357-A (GB)
Title: Improvements in and relating to electric control systems
IPC: B60L9/26
Filed: 1942-04-13
Abstract: 557,357. A.C. commutator machines. BRITISH THOMSON-HOUSTON CO., Ltd. April 13, 1942, No. 4829. Convention date, April 16, 1941. [Class 35] [Also in Group XXXVII] A series commutator single phase motor 10 has its interpole field split into two windings, one winding 12a, Fig. 2, carries a current in phase with the armature and main field 13, and the other winding 12b, by association with a resistor 25 and capacitor 26, carries a current in quadrature with the armature. By separating the interpole excitation into these two components, no additional switching is necessary when changing from motoring to regenerative braking and variation of the quadrature component with speed is easily obtained. Fig. 1 shows a two motor traction system embodying the above feature and also certain features of Specification 557,354. The in-phase interpole windings 55, 56 are in series with the armatures 40, 41, whilst the quadrature interpole fields 55a, 56a and associated resistor 70, 70a and capacitors 71, 71a are in series with the main fields 48, 49 and are associated with the armature circuit through a current transformer 57. Above a predetermined speed a switch 72 cuts out the capacitor 71 and inserts the resistor 70a. Regenerative braking is obtained by opening switch M2 and closing switches B1, B2, whereupon the armatures are placed in series with a stabilizing resistor 75 and the field are energized through transformers 76 and 5, in accordance with the regenerated current through the resistor 75.
Patent GB-746698-A (GB)
Title: Improvements in or relating to signal receivers for carrier telecommunication systems
IPC: H01J1/14
Filed: 1954-02-18
Abstract: 746,698. Voice-frequency signalling. TELEFONAKTIEBOLAGET L. M. ERICSSON. Feb. 18, 1954 [Feb. 18, 1953], No. 4868/54. Class 40 (4). A carrier terminal demodulator 1 produces from an input #c-#s, two side-band frequencies, the first fs of which is fed via a low-pass filter 2 to a speech or like circuit a<1>, b<1> and the second 2#c-#s, is fed via a high-pass filter 3 to a second demodulator 4. The lower side-band of the output of the latter is selected by the low-pass filter 5 and fed to a frequency discriminating circuit TM which operates a signalling relay 7 (e.g. for ringing or dialling). As shown, the carrier frequency fed to the demodulator 4 may conveniently be twice the carrier frequency fc fed to the demodulator 1. The filters are chosen so that each blocks frequencies passed by the other thereby ensuring that no signals appearing at a<1>, b<1> affect the signal receiver TM. Owing to the large separation between the limits of the ranges of frequencies the filters 2, 3 may be of simple construction, e.g. a single condenser or inductance or a resistance-condenser combination as also may be the filter 5.
Patent GB-109220-A (GB)
Title: Improvements in Humidifying or Spraying Apparatus.
Inventor: SMETHURST HERBERT
IPC: F24F6/06
Filed: 1917-04-04
Abstract: 109,220. Smethurst, H. April 4, 1917. Sliding tubular valves. - An adjustable valve, employed to effect discharge of air at a desired rate, consists of a tubular member having a number of apertures m capable of being closed by a sleeve n movable in one direction by a screwed disk o against the pressure of a spring p.
Patent GB-708207-A (GB)
Title: An improved front carrier for cycles
Inventor: HUNT JOSEPH
IPC: B62J9/00
Filed: 1952-02-26
Abstract: 708,207. Luggage-carriers for cycles. LLOYDS CYCLES, Ltd., W. A. Feb. 5, 1953 [Feb. 26, 1952], No. 4949/52. Class 136(1) A front carrier 1 for cycles comprises a base part 4 to support a container 5 above the front wheel of the cycle, a pair of up - standing spaced side bars 2 carried by the base part and a two armed bracket 9 clamped at 10 to the steering tube, the arms of the bracket being adjustably secured one to each side bar 2, at their forward ends, and being spaced apart to define a space for the brake control rods of the cycle. The container 5 is provided with a clip 20 having lugs 23 which slidably engage over the side bars 2. The bars 2 are connected by cross bars 6, 8 which carry hinged wire loops 26 to receive straps for holding articles on the carrier 1. As shown, the bars 2 have an integral upper part 3. In a modification this part 3 is omitted and the lugs 23 on the clip 20 are replaced by loops. In a further modification, the bars 2 are replaced by metal strips 2<SP>1</SP>, Fig. 5, and a 'modified clip 20<SP>1</SP> provided on the container 5.
Patent GB-1029171-A (GB)
Title: A semiconductor arrangement
IPC: H01L25/11
Filed: 1963-02-07
Abstract: 1,029,171. Semi-conductor devices. SIEMENS-SCHUCKERTWERKE A.G. Feb. 7, 1963 [Feb. 10, 1962], No. 5094/63. Addition to 1,009,359. Heading H1K. A semi-conductor device of the type described in the parent Specification in which a semiconductor element mounted between two carrier plates is enclosed in a housing comprising an insulating ring and two ductile cover plates, is provided with tapered cooling fins. As shown, cooling fins 7, 8 cut from rolled or drawn copper stock, have central apertures 7b, 8b into which are inserted copper rivets 7c, 8c which are riveted into tight contact with the fins and to provide flat surfaces at one side of the fins and concave surfaces at the other side of the fins. The semi-conductor device is mounted between a pair of fins 7, 8 with the flat surfaces of rivets 7c, 8c pressing on the ductile cover plates 4, 3 respectively, and with lens-shaped pressure bodies 9 located in the surfaces 7e, 8e of the rivets. Several assemblies as described above may be stocked to form a rectifier unit as in the parent Specification.