baber/WOPTO huggingface dataset:
Patent GB-669883-A (GB)
Title: Electro-acoustic transducers
IPC: H04R9/10
Filed: 1950-04-13
Abstract: 669,883. Receivers. TELEFONAKTIEBOLAGET L. M. ERICSSON. April 13, 1950 [April 21, 1949], No. 9153/50. Class 40 (iv). In a moving coil electro-acoustic transducer, the diaphragm 4 is completely surrounded by the magnetic circuit which is provided with holes 17 for the transmission of acoustic energy and the coil constitutes one of the windings of a transformer having an unbroken magnetic circuit which is common with the operational magnetic circuit of the transducer. In Fig. 1 the coil 5 comprises a single short-circuited turn into which currents are induced by a coil 16 wound around a common core 1. The operational air gap is between the common core 1 and an annular permanent magnet 15 which together with an insert 6 and the capsule wall 3 forms a damping chamber connecting with the space at the back of the diaphragm through holes 7 covered by silk cloth 9.
Patent GB-218022-A (GB)
Title: Improvements in or relating to incandescent gas burners
IPC: F23D14/30
Filed: 1923-04-04
Abstract: 218,022. Caudwell, F., and Belton, C. M. D. April 4, 1923. Incandescent gas burners.-The burner comprises a cylindrical nipple-regulator 1, having a number of longitudinal or spiral tapering grooves 2, preferably of greatest crosssectional area at the outlet end, and a. mixing-tube 9, the inner end of which is of smaller diameter than the mixing-chamber 7 and which preferably tapers from the outer to the inner end. The lower end of the regulator 1 may be rounded and the grooves extended to the centre, or openings may be formed between the nipple 3 and the regulator 1 by forming flats on the latter, in place of grooves, as shown in Fig. 7. The regulator 1 is screwed to a slide 4 adapted to be reciprocated by a spindle 6 carrying a crank pin 5. A superheater 10 containing a diaphragm 11, provided with peripheral openings, may be interposed between the mixing- tube 9 and the nozzle 13. The Provisional Specification states also that a globe holder G, a china protector P and a shield H may be screwed in position by a lock-nut F.
Patent GB-1207765-A (GB)
Title: Control system for traction motors
IPC: B60L9/04
Filed: 1969-02-20
Abstract: 1,207,765. Automatic current control. WESTINGHOUSE ELECTRIC CORP. Feb.20, 1969 [March 6, 1968], No.9252/69. Heading G3R. [Also in Division H2]  Two pairs of traction motors are supplied through a thyristor which becomes conductive or non-conductive when a current-responsive signal is less or greater than a reference signal. For braking two loop circuits are formed, each containing two armatures and the field windings of the other two motors with a common braking resistor. The thyristor is connected across a portion of the braking resistance and is controlled, as in power operations, to maintain the braking current at a desired average value. A signal current on line 31 is modified by jerk limit and load weight circuits, and is applied to a capacitor 39. The signal representing the motor current is derived from a transistor and is applied across Zener diode 37 and resistor 38. Conductors 40, 41, provide triggering signal to an "on" pulse generator 29 and an "off" pulse generator 28 respectively. The voltage-drop across the diode 37 determines the difference between maximum and minimum valves of the motor current. In the pulse generator 28, capacitors 48, 56, are charged initially, a positive signal at the base of transistor 42 turning-off the transistor 46 whereby capacitor 48 discharges through diode 50. An output pulse on conductor 27 turns-on the transistor 51 for a short period, so causing transistor 55 to turn-off whereby capacitor 56 discharges through diode 50 to provide an output pulse for quenching the main thyristor. The capacitors 48, 56 are recharged when transistor 51 is again turned-off. In the amplifier 29, the transistor 42<SP>1</SP> is turned-off to produce an output pulse which is applied to the main thyristor and a commulating thyristor.
Patent GB-444139-A (GB)
Title: Improvements in and relating to the construction of rubber surfaced roadways, tennis courts, and other areas
IPC: E01C5/22
Filed: 1935-03-27
Abstract: 444,139. Resilient road surfaces; blocks. GOODWIN, L. C., and PARNHAM, J. B., Craven House, Kingsway, London. March 27, 1935, No. 9309. [Classes 20 (iv) and 87 (i)] A reinforced resilient surface layer 10 for roads and the like is provided with projections 19 which key it to the foundation 11 and, adjacent the projections, with anchoring means 13 which engage with the reinforcement 12. The anchoring means may, as shown, be in the form of tongues depending from heads 14 and having upturned ends 16 which anchor with the foundation, or they may consist of bolts which pass through holes in the foundation and receive nuts for locking purposes. The latter means is used when the foundation is not plastic in the first instance. The surface may be applied in three separate layers, the lower stratum of rubber being placed on the foundation, followed by the reinforcement and finally the upper rubber layer, and the whole is vulcanized in known manner. In the construction of blocks, the resilient surface is composed of one or more layers of rubber, or rubber substitute. Thus, the lowest layer may be compounded to withstand the tearing action of the reinforcement, an intermediate layer being compounded to provide a cushioning effect, and the uppermost layer being made to withstand abrasion. Small blocks may be combined together to form a road-surface marking.
Patent GB-1205705-A (GB)
Title: Electrically conductive zinc oxide
IPC: H01B1/08
Filed: 1968-02-27
Abstract: 1,205,705. Electrically conductive zinc oxide. ST. JOSEPH LEAD CO. 27 Feb., 1968 [2 Aug., 1967], No. 9326/68. Heading C1A. Zinc oxide is made electrically conductive by contacting it with a non-oxidizing atmosphere containing at least 1 volume per cent of Zn or Mg vapour at 600-900 C. in the presence of 0.01 to 5 atom per cent of metallic Al or an oxide of Al, Ga, In, Ge or Sn. The zinc oxide may be mixed dry or moist with the activator oxide, or with a precursor thereof which decomposes under the heating conditions to give said oxide, and the Zn or Mg vapour is introduced either by passing the non-oxidizing gas over the molten metal or by mixing granules of the metal with the ZnO prior to heating. Where Al is the activator, evaporation of an alloy containing Al and Mg or Zn may be used to supply these elements.
Patent GB-250605-A (GB)
Title: Improvements in supporting and cooling systems for electric devices
IPC: H01J19/36
Filed: 1926-04-08
Abstract: 250,605. British Thomson-Houston Co., Ltd., (Assignees of Prindle, R. B.). April 9, 1925, [Convention date]. Vacuum tubes. - A thermionic device having a flange is supported by means of rings having ratchetlika ramps so as, when relatively rotated, to grip the flange with a symmetrically - distributed pressure. When the device is thus mounted in a cooling- chamber, a separate cooling arrangement may be provided for the flange. Fig. 1 shows component parts of a mounting. The double flange 24. 25 around the anode 2 of the valve is of nearly square form and is attached to a handle 31 for convenience of manipulation. It is inserted through an aperture of similar form in a ring 21 into a similar recess in the cover of a cooling tank 1. The ring 21 is normally retained between this cover and a rotatable ring 14, secured by screws to a ring 13 loosely engaging a flange 12 on the cover. After inser. tion of the thermionic valve the ring 21 is turned by means of a projection 22 so as to overlap the corners of the flange 24, 25; during this movement pins 20 on the ring 21 ride down inclined surfaces in the flange 12 of the cover. On afterwards rotating the upper ring 14 by means of a handle 16, inclined surfaces 32, 33 on this ring and the ring 21 cause the latter ring to be forced down on to the flange 24. 25 of the valve. In the seating for this flange is a circular groove 9 flanked by gaskets and communicating with inlet and outlet tubes 5 for cooling fluid. An additional gasket may be provided between the flange and seating. The flange may be cooled while the anode itself is " baked " to remove gases during manufacture. In the valve, the grid lead is enclosed in a silica tube 39, and, with the cathode leads, is surrounded by a silica sleeve 35.
Patent GB-906856-A (GB)
Title: Improvements in or relating to the manufacture of paper from fibres of polyaminocaproic acid
Filed: 1961-03-14
Abstract: 906,856. Paper containing polyaminocaproic acid fibres. ONDERZOEKINGSINSTITUUT RESEARCH N.V. March 14, 1961 [March 17, 1960], No. 9353/61. Class 96. Paper made of or containing polyaminocaproic acid fibres, e.g. together with cellulose fibres or other organic, or inorganic fibres, is impregnated with a solution of chloral hydrate, e.g. in water, in ethyl or methyl alcohol, or in acetone, of such concentration that the fibres do not swell, the solution then being concentrated in the paper by evaporation, the evaporation not being completed until the fibres have been at least superficially swollen. With water as solvent, the initial solution contains not more than 450 g.p.l. of chloral hydrate, and with acetone, not more than 800. When swelling commences, there may be 15 to 25% of chloral hydrate present in the paper. Evaporation may be effected using calender rolls at 105 to 125 C.; it may be aided by suction.
Patent GB-318159-A (GB)
Title: Improvements in battery eliminator chokes
IPC: H02M1/14
Filed: 1928-03-28
Abstract: 318,159. Andrewes, H., and Dubilier Condenser Co. (1925), Ltd. March 28, 1928. Converting pulsating currents into steady continuous currents. - In means for supplying steady continuous current to the high tension and low tension circuits of radio receivers &c., the two smoothing chokes are wound on a common core and arranged so that the fluxes due to the D.C. components cancel each other, means being provided to ensure such phase relationship between the ripple components that the chokes are highly inductive as regards these components. In the arrangement according to Fig. 2, low tension current is supplied from an A.C. source through a transformer 4, full-wave rectifier 5 and choke 1. High tension current is supplied through a valve 6 supplied with filament current through a condenser 7 as described in Specification 297,520. The smoothing means for the high tension current comprises condensers 8, 9 and a choke 3 wound on the same core as the choke 1. A condenser 16 is provided in one or other of the supply circuits to obtain the required phase relationship between the ripple components of the currents flowing in the chokes 1, 3. Variable resistances 10, 11 are connected across the two sets of output terminals in order that the currents flowing in the two circuits may be adjusted to produce equal and opposite fluxes in the core of the chokes. A similar arrangement is employed in the case of a D.C. supply source, except that a series resistance is used in place of the transformer 4 for obtaining the required reduction in voltage for the low tension supply.
Patent GB-911208-A (GB)
Title: Improvements in or relating to the purification of hydrocarbon mixtures
IPC: C07C7/00
Filed: 1961-03-14
Abstract: Aromatic hydrocarbons are purified by catalytic hydrofining under conditions which also yield saturated hydrocarbons, e.g. cycloparaffins, which form azeotropes with the aromatic hydrocarbons and recovering the aromatic hydrocarbons by extractive distillation. The hydrofining, e.g. of crude benzene, may be effected over a catalyst containing molybdenum and preferably also cobalt at 320-360 DEG C. and 40-60 atmospheres.  The extraction agent in the distillation may be aniline, furfurol or phenol.
Patent GB-218389-A (GB)
Title: Improvements in and relating to stapling machines
IPC: B25C5/16
Filed: 1923-04-05
Abstract: 218,389. White, A. E., (Hotchkiss Co., E. H.). April 5, 1923. Stapling, hand tools for.-In a stapling machine using strip staples and including means as described in Specification 207,895 for straightening or preventing turning of the end staple whilst it is severed and driven, the strip slide 14 which is pivoted to the base 10 by a pin 15 is at its upper portion slightly less in width than the distance between the prongs of the staple, but is wider below the prongs to form spacing strips 51, Fig. 12, between the slide and its housing. The strips are discontinued near the forward end 52 of the slide to give a clearance throughout the height of the slide between the staple and the housing, and the forward end of the slide is also bevelled off at 53. The construction enables bent or jammed staples to be readily cleared, and to assist in this the staple throat 19 is cut away slightly at 54. The staple-straightening means comprise a frame 40 having L-shaped legs 41 which embrace the plunger 20 and are adapted to enter between the prongs of the first and second staple when the plunger is depressed. Spring fingers 45 at the upper end of the frame 40 engage shoulders 44 on the plunger so that the latter carries the frame 40 with it until the fingers 45 are opened by lugs 48 on the cam plate 47. On return movement of the; plunger, a cross-bar 46 on the frame is engaged by a lug 28 on the plunger. The lug 28 operates through a tumbler 24 the usual strip-feeding mechanism.
Patent GB-480832-A (GB)
Title: Improvements in or relating to gauges
Filed: 1937-04-02
Abstract: 480,832. Linear - dimension gauges. AKTIEBOLAGET SVENSKA KULLAGERFABRIKEN. April 2, 1937, No. 9443. Convention date, May 29, 1936. [Class 106 (ii)] Comprises a snap gauge having one anvil provided with a plane gauging surface and the other anvil provided with a long substantially cylindrical gauging surface for maximum dimensions and a second gauging surface displaced from the former for minimum dimensions which surface is short in the direction of the axis of the cylindrical surface. The bend 1 of the U-shaped gauge is resilient and of the anvils 4, 5, the latter is a plane surface as usual, while the anvil 4 is formed with a cylindrical ridge 6 convex in the direction in which the gauge is applied to a work-piece and spaced apart from this ridge are one or two small spherical portions 7 for gauging a minimum dimension. The arms 2 of the gauge are connected by a stud 8 and nuts 11, 15, 12, 16 which are formed with spherical faces on one side to engage spherical faces on the bosses through holes 9, 10 in which the stud passes with clearance. A distance sleeve 19 of U-section determines the dimension. The gauge frame is made from a blank 6 which enables several ranges to be made from similar blanks by first varying the curvature of the bend and secondly using sleeves 19 of different length. The member 7 may be formed of two spaced spherical members. The shanks may be connected by a pivot instead of a resilient part and the high and low gauge may be separate or the high limit arranged on one side and the low limit on the other.
Patent GB-348793-A (GB)
Title: Improvements in steam traps
IPC: F16T1/10
Filed: 1930-03-25
Abstract: 348,793. Steam traps. DAVIES & SONS, Ltd., H. and DAVIES, G., Worsley Street, Salford, Lancashire. March 25, 1930, No. 9460. [Class 64 (ii).] In a steam trap employing a capsule A, Fig. 1, containing expansible fluid, an additional diaphragm B is provided, secured at its periphery to the capsule and having an aperture b. In a modification, Fig. 3, a regulating screw C passes freely through the aperture b in the additional diaphragm b. This steam trap is stated to operate without resetting under a greater range of steam pressure than a trap with an ordinary capsule.
Patent GB-1104588-A (GB)
Title: Method of producing an interrupted or discontinuous weld between two members
Inventor: BRADSHAW HARRY OSBORNE
IPC: B23K11/00
Filed: 1966-03-04
Abstract: 1,104,588. Welding by pressure. TUBE PRODUCTS Ltd. 2 Nov., 1966 [4 March, 1966], No. 9565/66. Heading B3R. In producing an interrupted effective weld between two members a mask of electrically conducting material which inhibits the making of an effective weld is interposed between the members at a number of areas and current and pressure suitable to produce effective electric resistance welding between the members where the interposed material is absent are applied to the members. To produce a tube with an interrupted longitudinal fin thereon one or more layers of copper or aluminium foil are wrapped around the tube at appropriate points, a fin is applied continuously to the tube and current and pressure applied thereto continuously. The fin is then cut through where normal welding has not taken place, i.e. at said appropriate points, and the parts of the fin are removed. Any welding of the fin through the foil is brittle and easily broken.
Patent GB-414177-A (GB)
Title: Improvements relating to devices for offsetting ridgers or other draft implements attached to rotary tilling machines
IPC: A01B69/06
Filed: 1933-03-30
Abstract: 414,177. Implements and machines for working land. FOWLER & CO. (LEEDS), Ltd., J., Steam Plough & Locomotive Works, STOREY, N. C., and HASSON, P. R., 13, Leathley Road, Hunslet, both in Leeds. March 30, 1933, No. 9627. [Class 6 {i).] A device for adjusting ridgers or other implements attached to a rotary tilling machine of the type described in Specification 103,302 comprises manually-controlled power-driven means for off-setting the implements to either side of the machine, means for automatically stopping the action and holding the implements in position at the desired offset, and means for holding the controlling-apparatus in a neutral position when the device is out of action. Ridging implements 1, 2 are shown mounted on a swinging frame 3 connected to the tiller frame 4, 5 by parallel links 6, 7 and vertical hinge pins 8, 9. A shaft 18 is driven by bevel gearing 16, 17 from the spindle 12 of one of the rotary tilling-tools. The shaft 18 drives a second shaft 24 in one direction through spur gearing 20, 25 or in the opposite direction through chain gearing 21, 27, the gearing being mounted in a gear-box 19 and controlled by a clutch 23. In another gear-box 28 a worm 29 on the shaft 24 engages a toothed segment 30 from which projects an arm 32 connected by a link 33 to the frame 3. The clutch 23 is controlled by a lever 34 provided with a spring- loaded plunger 37 having a V-shaped point which in neutral position enters a corresponding recess in a fixed bar 38. When the device is in operation and the frame 3 reaches the desired offset position one or other of two adjustable pins or lugs 39, 40 on the segment 30 engages the clutch lever 34 and moves it into neutral position. The worm 29 locks the frame 3 in offset position. The device may be declutched by hand to put the frame 3 in intermediate positions. In a modification the worm 29 is driven in one direction from one tilling-tool spindle 12 and in the reverse direction from another tilling-tool spindle 13.
Patent GB-358024-A (GB)
Title: Improvements in or relating to containers of paper or the like material
IPC: D21H27/32
Filed: 1930-03-27
Abstract: 358,024. Paper bowls and like vessels. LEIBFARTH, R., Metzingen, Wurtemberg, Germany. March 27, 1930, No. 9724. Convention date, Dec. 12, 1929. Void [Published under Sect. 91 of the Acts]. [Class 66.] The body portions of bowls, cups, and like vessels are formed of.layers of paper bound together and stiffened by an intervening layer of acid-free casein, inserted disc bottoms being attached to the bodies also by this material. The formed vessels are treated in a heated shaping mould or press.
Patent GB-163287-A (GB)
Title: Improved ejector mechanism for sporting guns
IPC: F41A15/06
Filed: 1921-04-01
Abstract: 163,287. Fabrique Nationale d'Armes de Guerre, Soc. Anon. May 14, 1920. [Convention date]. Breech actions, drop-down barrel.-Consists in selective ejector mechanism comprising, for each barrel, a spring-pressed extractor 1, the leg 4 of which is adapted to be engaged, when the hammer 11 has fallen, by a projection 6 on the cocking-lever 7, so that when the barrels are opened, the extractor is first positively moved to the rear as shown in Fig. 3, and is then released to allow the spring 2 to cause the ejection.
Patent GB-577038-A (GB)
Title: Improvements in and relating to dynamo electric machines
IPC: H02K19/20
Filed: 1941-07-31
Abstract: 577,038. Dynamos. TUSTIN, A., MANDL, A., and METROPOLITAN - VICKERS ELECTRICAL CO., Ltd. July 31, 1941, No. 9767. [Class 35] A polyphase homopolar alternator comprises three pairs 18, 22 ; 2, 13 ; 17, 21 of cooperating stator and rotor elements. The outer rotor elements 21, 22 have single polar projections 23, 24 diametrically opposite to a single polar projection 14 on the centre rotor element. Exciting coils 15, 16 produce a magnetic flux flowing in one radial direction between pole 14 and wound stator element 2 and in the other radial direction between poles 23, 24 and unwound stator elements 17, 18. To obtain magnetic and dynamic balance poles 23, 24 are made with the same pitch and radial depth, but half the axial width, of the central pole. Four coils 5 are wound in four equidistant slots on the stator 2 and as the pole 14 passes each in turn it induces four complete cyclic pulses with flat tops. These pulses are spaced 90‹ apart and by a suitable rectifying circuit may be made undirectional. The rotor elements are spaced on the shaft 6 by sleeves 25. Cylindrical members 26 position the stator 2 within the main frame 1, which has dished ends 19, 20 within which are secured the stator members 17, 18 and the bearings for the rotor. If desired, the rotor may be fixed while the " stator " rotates.
Patent GB-344684-A (GB)
Title: Improved construction of weight motor
IPC: F03G3/00
Filed: 1930-03-27
Abstract: 344,684. Weight motors ; inertia governors. ORMSTON, H. M., 11, Ranelagh Gardens, Ilford, Essex. March 27, 1930, No. 9785. [Classes 10 and 57.] A weight motor consists of a lever F, with weight F<1> and counterweighted pawl G, mounted on an horizontal shaft A carrying a ratchet wheel E and a worm wheel D meshing with a worm J on a vertical shaft K. The shaft K has a worm wheel N meshing with a worm P on an horizontal shaft R which carries a worm wheel S meshing with a worm T on a vertical shaft U. The shaft U is the driven shaft and may carry a gramophone turntable V and be connected to governor mechanism consisting of a disc a secured to a shaft Y and carrying one or more coned projections b engaging similar projections d on a loose disc c. The disc c is pressed towards the disc a by a spring e and engages an adjustable stop l carried by the casing.
Patent GB-348311-A (GB)
Title: Improvements in and relating to apparatus for testing insulated electric cables, wires and the like
IPC: G01R31/02
Filed: 1930-03-27
Abstract: 348,311. Indicating and locating faults; instrument casings; collectors; couplings. SCOTT, J. and SCLAR, I., Inglis Street, Dunfermline. March 27, 1930, No. 9833. [Classes 37 and 38 (i).] Portable apparatus for testing the insulation of cables, particularly the laid-up conductors of colliery cables, comprises pairs of spring-biassed roller contacts 9, 10 engaging the cable sheathing at opposite diameters, the conductors being connected to an induction coil 18 by a flexible single or multiple coupling 26 provided with a needle-point or other connection. A spark gap a, b is located between the roller contacts and induction coil, and so long as normal sparking occurs the insulation is good, cessation of or decrease in sparking indicating faulty insulation. The ends of the casing form cable guides, and a protective hood 3 is provided. Earthed brushes engage the cable sheathing at the cable guides for collecting surface charges thereon. The protective hood 3 may close the main plunger switch 20 when it is placed in position, or the roller-carrying arms may perform this function. The spark gap a, b is provided with an intermediate electrode to maintain its impedance constant, and is adjusted by a knob 33 which may be associated with a calibrated scale. An auxiliary gap 35 may be provided.