baber/WOPTO huggingface dataset:
Patent GB-428324-A (GB)
Title: Improvements in electric circuits comprising gasfilled triodes
IPC: H04L25/24
Filed: 1934-02-22
Abstract: 428,324. Amplifying circuits using gas-discharge tubes. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and ESPLEY, D. C., c/o General Electric Co., Wembley, Middlesex. Feb. 22, 1934, No. 5855. [Class 40 (v)] Relates to circuits comprising a pair of gasfilled valves so connected that the starting of the discharge in one member of the pair stops a discharge already flowing in the other, and comprises means whereby the anode and /or grid potential of the second member is changed by the discharge through the first member so that the grid potential becomes at least as negative as the stopping grid potential corresponding to the prevailing anode potential. The push-pull valves 1, 1<1>, Fig. 2, feed a twoposition relay 10 which provides a pair of impedances one in each anode circuit and may also provide reaction between the two valves. If a discharge is passing in valve 1 but not in valve 1<1>, when a signal arrives to make the grid 31 of valve 1<1> more positive, the discharge starts in this valve, its anode 4<1> becomes more negative and a negative charge is induced on the grid 3 of valve 1 through the condenser 11 connecting anode 4<1> and grid 3 which is sufficient to stop the discharge in valve 1. A condenser 11<1> is also provided between the anode 4 of valve 1 and the grid 31 of valve 11 which functions to disable valve 1<1> when valve 1 receives a signal. The grid resistances 12, 12<1> enable a smaller negative charge to cause the grid potential to fall below the stopping potential. In other embodiments inductive back couplings are introduced to replace the condensers 11, 11<1>, and in some cases anode control is combined with grid control by coupling the anode circuits in such a way as to effect a momentary reduction of the anode voltage of the other valve when one of the valves receives a signal. Fig. 7 shows a circuit which depends on the signal causing, for example the grid 3 of valve 1 to become more negative than its normal potential when the grid 31 of valve 1<1> becomes more positive, the reaction of the anode circuit of valve 1<1> through the windings 10 causing sufficient reduction in the anode voltage of valve 1 to stop the discharge at said negative grid potential. Specifications 378,868, 418,828, and 423,390 are referred to.
Patent GB-126274-A (GB)
Title: Process for the Preparation of Anhydrous Sulphide of Zinc.
Inventor: COMMENT PAUL
IPC: C01G9/08
Filed: 1919-03-11
Abstract: 126,274. Comment, P. April 30, 1918, [Convention date]. Addition to 106,489, [Class 1 (iii), Oxides &c., Metallic]. Pigments.-In the production of zinc sulphide by calcining zinc persulphide, ZnS5 with zinc sulphate and alkali sulphate as described in the parent Specification and in Specification 114,407, the alkali sulphate may be wholly or partly replaced by an alkali salt capable of producing the sulphate under the reaction conditions, such as a sulphite, hypo-sulphite, or thionate, and the zinc persulphide by a zinc polysulphide containing less sulphur such as may be produced by precipitating a zinc salt with various amounts of alkali or alkaline-earth polysulphides or by removing some sulphur from zinc persulphide by treatment with solutions of alkalies or alkali or alkaline-earth sulphides. When alkali sulphide is produced as well as sulphate from the salt employed, the zinc sulphate must be sufficient to form zinc sulphide with such sulphide.
Patent GB-935984-A (GB)
Title: Improvements in the production of solid propylene polymers
Inventor: STICKNEY PALMER B
IPC: C08F110/06
Filed: 1962-02-16
Abstract: Propylene is polymerized in an inert liquid reaction medium using as catalyst an anhydrous chloride of samarium and an aluminium trialkyl, the alkyl groups containing 1 to 8 carbon atoms.  The reaction medium is preferably a hydrocarbon, e.g. cyclohexane.  Propylene partial pressures of 1-21 kg./cm2. or higher and reaction temperatures of 20 DEG -120 DEG C. are used and the polypropylene produced is mainly isotactic and has a melting point of about 160 DEG -165 DEG C. and a density of about 0,9 g./c.c. Generally 0,01 to 1 gram of catalyst is used per gram of propylene and mole ratios of anhydrous samarium chloride to aluminium trialkyl may be from 1:1 to 1:10.
Patent GB-781794-A (GB)
Title: Improvements in or relating to gate valves
IPC: F16K27/04
Filed: 1955-03-02
Abstract: 781,794. Valves. BRYAN DONKIN CO., Ltd. March 2, 1955 [Sept. 21, 1954], No. 6214/55. Class 135. A valve plate h with an aperture which may be brought into register with the passage through the valve coacts with seatings a which are pressed against the plate h by elastic rings d and may be pressed apart to facilitate assembly of the valve plate between the seatings by a pair of diametrically opposite wedges which are driven by screw-threaded rods between opposed inclined surfaces n on carrier rings c for the seatings a, the wedges being removed after assembly. The seatings are removable from the body of the valve without disconnecting the latter from piping after removal of a cover i and the valve plate h. The carrier rings c mount elastic rings f which urge covers g against the valve plate h to prevent dirt &c. from the controlled passage from falling to the bottom of the valve housing. To position the carrier rings c such that the elastic rings f press the plates g against the valve plate h further wedges are used to engage inclined faces m on the carrier plates which are then locked in their adjusted positions by members u after which the wedges are removed. In a modification, the carrier plates are omitted, the plates g being carried directly by the seatings a.
Patent GB-646479-A (GB)
Title: Improvements relating to clothes washing machines
IPC: D06F13/02
Filed: 1948-02-28
Abstract: 646,479. Washing and drying machines. GENERAL MOTORS CORPORATION. Feb. 28, 1948, No. 6231. Convention date, March 31, 1942. [Class 138 (ii)] A driving mechanism for a clothes washing machine comprises a rotatable member 25 adapted to rotate a tub, a reciprocable member 22 adapted to drive an agitator and a two-way clutch 30 which is alternatively connectible between a driving shaft 24 and the rotatable member 25 to rotate the tub and between the rotatable member 25 and a fixed part 32 to effect reciprocation of the agitator. The agitator is attached to the shaft 22 and is reciprocated axially through a ball and socket joint by an extension 51 of a sleeve 50. This sleeve is pivotally mounted on an obliquely disposed pin 49 in a head 48. The whole of these parts are carried by the member 25 which is rotatably mounted on the driving shaft 24 of an electric motor 20 and when the cage member 25 is held stationary with respect to the casing of the washing machine the head 48 is rotated by the electric motor through gears 45, 46. The cage 25 is connected to the tub of the machine and rotates it for spin drying. The change from agitation to spin drying and the reverse is effected by a spring clutch 30 and a friction clutch and brake 27, 28. The spring clutch 30 surrounds the driving shaft 24 and in its unstressed condition one end tightly grips the shaft, the other end being connected to a member 33 which is rotatably mounted on the shaft. This member 33 which is attached to clutch plate 28 rotates with the shaft and drives the cage 25 and thus the tub through plates 27 of the friction clutch which are pressed into engagement with plate 28 by springs 38 and are connected to cage 25 through slidable pins 29. Normally the spring clutch 30 is compressed axially by a spring biassed lever 31 to expand it, this releases the driving shaft 24 and causes the clutch 30 to grip a stationary member 32 which is connected to the casing of the machine. The clutch plate 28 is thus prevented from rotation and the friction between plates 27, 28 slows down the cage 25 and hence the tub and eventually holds them stationary ; the shaft 24 then rotates the head 48 to reciprocate the agitator. The gear wheels 45, 46 act as a gear pump and keep the reciprocating mechanism lubricated through circumferential grooves on the pivot pins and passages in the other parts. The lever 31 is shifted by an automatically controlled solenoid.
Patent GB-608790-A (GB)
Title: Basic refractory products in particular basic refractory linings for furnaces and parts of furnaces and a process for obtaining them
IPC: C04B35/03
Filed: 1946-02-28
Abstract: The calcined magnesia of the parent Specification is wholly or partly replaced by magnesia or magnesite which has been fused in an electric arc furnace.  Up to 40 per cent of chrome ore may be added to the material containing or consisting of fused magnesia.  The Specification as open to inspection under Sect. 91 describes also the addition to calcined magnesia of chrome ore or chalk This subject-matter does not appear in the Specification as accepted.
Patent GB-766768-A (GB)
Title: Brace attaching means for scaffold frames
IPC: E04G7/30
Filed: 1955-03-03
Abstract: 766,768. Scaffolding. JAGIEL, Z. J., and BEBOUT, J. W. March 3,1955, No. 6344/55. Class 20(2)  A brace bar 16, for connecting uprights of sectional scaffolding frames, has at least one end formed with a laterally facing U-shaped loop 18 for engaging round an upright to which it is releasably secured by means of a loop member 20 permanently a t - tached to the upright for engaging around the outer side of the loop 18. As shown in Fig. 3 the brace 16 is connected at the junction-between two superimposed uprights 12 which are connected in alignment by a stud 15. The loop member has a long stem 21 passing through the upper end of the lower upright and through the stud 15 which is thereby retained in position, and also has an L-shaped stem 23 which has a short portion arranged to enter aligned holes 24 in the lower end of the upper upright 12 and in the part of the stud 15 projecting from the lower upright 12. The short portion of the L-shaped stem is retained in engagement with the holes 24 by  a spring 26 mounted on the projecting end of the long stem 21 and retained under compression between the upright 12 and a  member (Fig. 2, not shown) on the end of the stem 21. The arrangement is such that with the L-shaped stem disengaged from the holes 24, it can be turned downwardly, permitting the loop 18 of the brace bar 16 to be engaged around the uprights 12, after which the stem 23 is turned to the position in. which it enters the holes 24 under influence of the spring 26, in which position it secures the brace bar 16 to the uprights 12 and retains the two superimposed uprights against relative twisting movements and axial separation.
Patent GB-706529-A (GB)
Title: Improved electric switch for internal combustion engines
IPC: H01H27/06
Filed: 1952-03-12
Abstract: 706,529. Mechanical switches, without quickaction; press-button retractive switches. GENERAL MOTORS CORPORATION. March 12, 1952 [March 20, 1951], No. 6373/52. Class 38(5) A key-operated combined ignition and starting switch for a motor vehicle comprises a rotatable ignition contact carrier 66 and an axially movable starting contact 75 the latter being movable only after rotation of carrier 66. The latter has tongues 65 engaging recesses 64 in an insulating member 60 rotatable with an insulating hub 55 which is slidable relatively to the member 60 and carries a rod 71 on which the contact 75 is slidable, the rod and hub normally being urged to the left by a spring 83. Carrier 66 has contacts 70 which are urged to the right by springs 67 and co-operate with fixed contacts 85 when a lock cylinder 45 is rotated, the hub and the lock being keyed together at 57. When the ignition circuit has been closed, a lug 100 coincides with a slot in the part 35 of the housing, so that the cylinder 45, hub 55 and rod 71 can be moved to the right to bridge starting contacts 88, 89 by means of contact 75. Spring 83 restores the parts axially, when they are released.
Patent GB-287702-A (GB)
Title: Process for producing ironoxidehydrate from iron metal
IPC: C01G49/06
Filed: 1927-03-08
Abstract: 287,702. Wagner, J. March 8, 1927. Ferric hydroxide is obtained by passing a strong current of air containing up to 10 per cent of crude dust-free carbonic acid through a tank containing iron or steel shavings, turnings &c. and filled with water to which has been added up to 3 per cent of sodium chloride and up to 1¢ per cent of chlorides or mixtures thereof such as ferrous or manganese chlorides, or according to the Provisional Specification, calcium or ammonium chlorides, which act as accelerators. The aqueous solution is circulated continuously through the tank, a, filter or receiver in which the product is removed, and back to the tank fresh iron and solution being added when required to make the process continuous.
Patent GB-1223654-A (GB)
Title: Improvements in or relating to printing
IPC: B41F27/12
Filed: 1969-02-06
Abstract: 1,223,654. Printing apparatus. SOC. D' ETUDES DE MACHINES SFECIALES S.A. 6 Feb., 1969 [14 Feb., 1968], No. 6434/69. Heading B6C. A plate cylinder incorporating plate-tensioning means comprises a longitudinally gapped peripheral wall 1 and two end discs 2, joined by a shaft 5. Within the cylinder a rotatable support 11 carries a tensioning sector 8, the outer surface of which continues that of perpheral wall 1 and which is adjustable within the gap in wall 1. One or more bearing sectors 9 are also adjustable in the gap, and are supported by end discs 2, on which they slide. Plate 17 has bent ends 17a, 17b, which fit over the edges of wall 1 and sector 8 when the sectors 8, 9 are in their extreme anticlockwise positions. Rotation of screw 19 then moves sector 8 and tensions plate 17. Lock-nut 22 then secures sector 8. The sector 9 is then positioned to divide the gap opened up by movement of sector 8, and is locked in position by screws 31.
Patent GB-589013-A (GB)
Title: Improvements in and relating to pyrophoric lighters
IPC: F23Q2/46
Filed: 1945-03-15
Abstract: 589,013. Frictional igniters. WYNER, H., and ROTHMANS, Ltd. March 15, 1945, No. 6511. [Class 75 (iii)] In a pyrophoric lighter, the operative face of the abrasive wheel or sector a is cut with two sets of intersecting grooves, the first set b being parallel to the axis of the wheel or sector, and the other set d extending helically about the wheel or sector, so that a series of cutting points e is created, each point of which is offset laterally with respect to those in front and behind. The helical grooving d may be formed by a single helix, or in other cases, and particularly with sectors working through a limited angle, it may be composed of multiple start grooves.
Patent GB-750846-A (GB)
Title: Pocket saw
IPC: B23D61/18
Filed: 1954-03-15
Abstract: 750,846. Saws. SOC. ANON. TUBEST. March 5 1954 [June 15, 1953], No. 6523/54. Classes 61 and 145 In a saw comprising a thin wire with asperities projecting in all directions and having holding means at each end, the wire is constituted by two thin metal strips 7, 8, twisted together and each having teeth 9 along one edge. The strips are juxtaposed before twisting, the toothed edge of one of the strips overlying the smooth edge of the other strip. The saw teeth 9 are each provided with a cutting edge 17. The height p of the teeth is between “and ¢ of the overall width of the strip and is preferably 4/13 of the width. The pitch of the twist is between two and four times the width of the strip. The holding means comprise annular members 2 which are attached to the ends of the wire by thin metal wire 4 or tubular sections 3, or by other means. A bow shaped support may be engaged in the two annular members
Patent GB-590089-A (GB)
Title: Improvements in means for attaching braces to trousers and for other like purposes
IPC: A41F3/02
Filed: 1945-03-15
Abstract: 590,089. Braces for personal wear. HIGGINS, P. J. March 15, 1945, No. 6575. [Class 141] A substitute for a trousers button, of the type made of wire having a loop 9 for attachment to the braces tab 4, a shank portion 2 and two inwardly directed pointed prongs 7, 8, is provided with recesses 10 in the prongs to prevent their disengagement from the garment. The tab engaging loop 9 may be bent over outwardly and downwardly as shown, or may lie above the shank 2 in the same place as the rest of the device.
Patent GB-877078-A (GB)
Title: Improvements in or relating to rotary machines of the intermeshing screw type
IPC: F04C18/00
Filed: 1960-02-25
Abstract: 877,078. Rotary machines. SVENSKA ROTOR MASKINER A.B. Feb. 25, 1960 [Feb. 26, 1959], No. 6645/60. Class 110 (2). In a rotary machine of the intermeshing screw type comprising two stages 18, 22 arranged in series in a common casing, the intermediate wall 16 of said casing is formed with chambers 36, 44 having inlet and outlet bores 40, 46 for establishing communication between the stages. The casing may be made in one piece or upper and lower portions or consist of a number of axially-disposed parts. Sealing and/or cooling fluid may be injected into either or both of the stages. Specifications 627,162, 676,839, 705,795 and 832,386 are referred to.
Patent GB-764812-A (GB)
Title: Improvements in or relating to the photomechanical production of coloured illustrations
IPC: G03F3/00
Filed: 1955-03-07
Abstract: 764,812. Photomechanical production of coloured illustrations. LIE, A., and ARNESON, A. March 7, 1955 [March 6, 1954], No. 6651/55. Class 98 (2) From a first made uncoloured line original which may have black portions or shading two negative records are made, one of these is used directly to form a black printing plate and the other one is coloured in the colours required for the final illustration, such colours overlying the black portions of the negative and used as an original to prepare separation records for making the colour printing plates. The plates may be of photogravure or off-set formation and are printed in register to make the illustration. The colours applied may be yellow, blue and red and filters selectively transmitting these may be used for the separation. Burnt sienna, cold blue and cold green colours, and black for toning may be used in addition. The white parts of the coloured negative may be made black before effecting separation.
Patent GB-1456280-A (GB)
Title: Variable area exhaust nozzle assemblies
IPC: F02K1/12
Filed: 1974-02-14
Abstract: 1456280 Jet propulsion nozzles GENERAL ELECTRIC CO 14 Feb 1974 [18 June 1973] 6698/74 Heading F1J The invention relates to a variable area convergent-divergent nozzle for a gas turbine jet engine comprising primary flaps 34 and secondary flaps 24, the secondary flaps defining the outer surface of the nozzle assembly. The assembly shown in Fig. 1 comprises a jet pipe 12 to which an outer cylindrical casing 16 is secured by bolts 18. A unison ring 48 is disposed between the jet pipe and the outer casing and is translatable axially by means of a series of actuators 52, being shown in its downstream position in Fig. 1. A series of primary flap members 34 is pivotally mounted on the unison ring at 46, each primary flap being shaped to form a convergent portion 38, a throat: 40 and a slightly divergent portion 42. An outer portion 44 is secured to the downstream end of the divergent portion 42; a seal member 72 is disposed between the jet pipe 12 and the primary flaps. A series of secondary flap members 24 are pivotally mounted at the downstream end of the cylindrical casing 16 at 31, each secondary flap being pivotally connected to an associated primary flap 34 by means of a link member 62. The inner surface of each secondary flap is recessed so as to receive the outer portion 44 of the associated primary flap 34. A pair of rollers 70 engages a track 74 on the outer face of each primary flap 34, the rollers being mounted on a fixed frustoconical member 6 which includes a ring portion 66. The nozzle is shown in Fig. 1 in the position for use at subsonic flight operation the nozzle defining a convergent-slightly divergent form of minimum cross-sectional area, the outer surface of the secondary flap members 24 presenting a smooth surface with the fairing 14 and outer members 44 so inlet flow is continuous. In Fig. 2 (not shown) the unison ring 48 has been moved to the upstream position, the primary flaps 34 have been moved upstream and swing outwardly and the secondary flaps 24 have swing outwardly. The nozzle is now of convergent-divergent form of maximum cross-sectional area, and the secondary flaps present a continuous surface with the firing 14.
Patent GB-557555-A (GB)
Title: Improvements in driving gear for electrically propelled vehicles
IPC: B60K1/00
Filed: 1942-05-18
Abstract: 557,555. Driving gear for electric vehicles. KNY, E. C. May 18, 1942, No. 6714. [Classes 79 (ii) and 79 (iii)] [Also in Group XXIV] The motor casing 3 of an electric vehicle is pivoted to the chassis frame 1, 2 at 4 and acts as a lever arm carrying the road wheel and controlled by a spring 10, the motor shaft having a pinion 5 driving an internally-toothed ring 6 secured to the road wheel by a seating 7 of vulcanised rubber. The pinion 5 may be mounted on the motor shaft by means of a vulcanised rubber bush.
Patent GB-679504-A (GB)
Title: Improvements in and relating to inhibiting peroxidation of tetrahydrofurfuryl alcohol
Inventor: JONES DAVID GWYN
IPC: C07D307/12
Filed: 1950-03-20
Abstract: Tetrahydrofurfuryl alcohol is stabilized against peroxide-formation and discolouration by adding thereto at least one 2 : 4-dimethyl-6-alkylphenol, where the alkyl group has up to 8 carbon atoms.  The amount of phenol used is 0.01-1.0 per cent (preferably 0.02-0.1 per cent) by weight of the alcohol. Preferred phenols are 2 : 4 : 6-trimethylphenol, 2 : 4 - dimethyl - 6 - tert. butyl - phenol and 2 : 4 - dimethyl - 6 - (a ,a ,g ,g  - tetramethylbutyl)-phenol results with these being compared with results using other alkylphenols not covered by the invention.
Patent GB-658813-A (GB)
Title: Improvements in methods of constructing a motor-driven compressor
IPC: H02K5/128
Filed: 1949-03-12
Abstract: 658,813. Dynamo - electric machines. THERMA FABRIK FUR ELEKTRISCHE HEIZUNG AKT.-GES. March 12, 1949, No. 6849. Convention date, March 12, 1948. [Class 35] In a motor-driven compressor, the motor rotor 1 and the compressor 4 are totally enclosed in a non- magnetic casing 8, e.g. of stainless steel, having a machined sleeve portion 82 secured in the stator 2 and in which is secured a mounting ring 10 to which the compressor and rotor supporting plate 11 is secured and accurately located, a cover 9, through which pass the suction and delivery pipes 13, 14, being welded to a flange 8<SP>1</SP> on the casing.