baber/WOPTO huggingface dataset:
Patent GB-782119-A (GB)
Title: Improvements in and relating to protective earthing arrangements for electrical apparatus
Inventor: BARSDORF LEONARD WILLIAM
IPC: H02H3/16
Filed: 1954-10-14
Abstract: 782,119. Protective cut-out arrangements. GENERAL ELECTRIC CO., Ltd. Oct. 3, 1955 [Oct. 14, 1954], No. 29649/54. Class 38 (5). In an earth leakage protective arrangement, a transformer 4 has a centre-tapped secondary winding with its ends connected to the casing of a protected apparatus 1 and its centre tapping connected to earth 7 through a current-sensitive device which is actuated in the event of an insulation breakdown of the apparatus 1 to give an indication or effect a control. In the arrangement shown, earth fault current flowing through earth leads 10, 11, the secondary winding and a relay 6 to earth 7 opens the contacts of the relay 6 to de-energize the closing coil of a contactor 3 to interrupt the supply to the apparatus 1. Current normally circulates from the secondary winding through the coils of relays 8, 9, the leads 10, 11 and the casing of the apparatus so that should either earth connection become defective relays 8 and 9 are de-energized to open their contacts in series with the contactor closing coil and so open the contactor. The casing of the apparatus may also be connected through a further earth lead 12, a test switch 13 and the trip coil 14 of an earth leakage circuit-breaker 5 to an auxiliary earth 15, so that should a potential build up on the casing of the apparatus, the circuit-breaker 5 is tripped open. This opens the supply to the transformer 4 and to the closing coil of the contactor 3 which opens to disconnect the apparatus 1.
Patent GB-256103-A (GB)
Title: Improvements in and relating to footwear
IPC: A43B5/10
Filed: 1925-11-24
Abstract: 256,103. Hargreaver, G. de la P. Nov. 24, 1925. Soles.-A sports shoe or boot has a sole of felt. an upper with means for lacing or otherwise securing the same, an insole, and a layer of waterproof material such as sheet rubber or rubber latex arranged between the felt sole and insole. Reference has been directed by the Comptroller to Specification 51/85 and 13344/04.
Patent GB-698268-A (GB)
Title: Improvements in or relating to heat exchangers of the plate and gasket type
Inventor: KINTNER EDWIN KENDIG
IPC: F28F3/08
Filed: 1950-12-05
Abstract: 698,268. Plate heat-exchangers. PFAUDLER CO. Dec. 5, 1950, No. 29732/50. Class 64 (iii) A one-piece gasket adapted to be sandwiched between spaced heat exchange plates and defining a fluid flow-space between said plates, comprises a portion directing one fluid through said flow-space, a portion directing another fluid past said gasket to by-pass said flow-space, and a slot 94 extending through the gasket from one face to the other and out towards at least one edge of the gasket beyond the edges of the plates for receiving leakage fluid from either portion and conducting said leakage to the exterior of the apparatus. Apparatus incorporating such gaskets preferably comprises a series of plates and gaskets alternately arranged and releasably clamped together. In the form shown that gasket portion defining the flow-space between adjacent plates comprises strip members 98, 100, 106, 108 and 110 arranged to form a sinuous path for one of the heat exchanging fluids entering and leaving the flow-space at points 112, 114 these points of the gasket being aligned with corresponding ports in the adjacent plates, additional support for the gasket adjacent these ports being provided by fingers 116, 118 on the gasket which fingers extend across the ports and support the plate against fluid pressure in an adjacent flow-space, see Figs. 5 and 7 (not shown). The other portion of the gasket includes ports 74, 76 which direct the other heat exchanging fluid past the particular flow-space defined by the gasket. The leakage slot 94 in the gasket extends beyond the width of the heat exchange plates and for this purpose ear portions 96 are formed in the gasket in the gasket into which the slot 94 extends. The gasket comprises a sheet steel core of 22 gauge (0.0306 inches) material coated with neoprene to give the gasket an overall thickness of approximately # inch. The plates are of stainless steel. A cold plate adapted to be used in conjunction with a pair of gaskets is described said plate being made of rigid material such as aluminium or steel and having the same configuration as the gaskets but being of sufficient thickness to accommodate a pipe through which a refrigerant is passed. Alternatively the cold plate may have a coating of neoprene or other resilient material so that it may itself serve as a gasket between two heat exchange plates. See Figs. 9 to 11 (not shown).
Patent GB-410409-A (GB)
Title: Improvements in and relating to electric switches with a free-handle automatic release
IPC: H01H83/22
Filed: 1933-10-26
Abstract: 410,409. Protective cut-out systems; automatic circuit-breakers. FELTEN & GUILLEAUME CARLSWERK AKT.-GES., M³lheim, Cologne, Germany. Oct. 26, 1933, No. 29754. Convention date, Oct. 26, 1932. [Class 38 (v).] In a multi-phase switch with automatic release for the protection of persons and animals against contact with dangerous voltages arising from insulation failure in appliances such as electric fires or irons, means are provided for the connection and disconnection of the phases individually by hand, while all the phases may be disconnected together by hand or by means of a fault-current coil. The arrangement renders it possible, in the event of a fault on one phase, to connect the appliances to the remaining phases. In the arrangement shown, for a three-phase network with neutral wire, the movable contacts 4, mounted on leaf springs 3 secured to the plate 1 carrying the fixed contacts 2, are connected to pivoted levers 8, connected through toggle links 9, 10 to levers 12 pivoted at 11. The levers 12 can be actuated individually by handles 13, so that the corresponding phases can be connected and disconnected individually. The switches are locked in the " on " positions by means of twoarmed levers 15, one arm of which is connected by a spring 16 to the corresponding lever 8, while the other arm is connected to a pair of toggle links 17, 18. Each of the phase switches is provided with an overload relay in the form of a bimetallic strip 20 adapted to engage the toggle 17, 18 through an adjustable pin 21. The leaf springs 3 are also surrounded by horseshoe cores 22 which, in the event of a shortcircuit, attract armatures rotatable about a fixed pivot 23 to release the switches. The neutral wire is provided with a fault-current coil 25, through which, on failure of the insulation, a current flows to attract an armature 27 and release the switch in the neutral wire. The movable contact 4 of this switch is connected to a lever 29 secured to a shaft 30 which passes through all three phases and is connected to the releasing device of each phase through levers 31 and links 32. Release of the neutral wire switch, either automatically or by hand, thus effects release of all the phase switches, and the latter cannot be switched on without first switching on the neutral wire switch. The various switches are separated by partitions. In a modification, Fig. 4 (not shown), the contacts are arranged behind the switch operating mechanisms, and are each accommodated in a separate sparking chamber. When the switches are assembled, a plurality of such chambers are telescoped within one another, one chamber constituting the closure of the next chamber. Specifications 336,401, [Class 38 (v)], and 400,389 are referred to.
Patent GB-375180-A (GB)
Title: Improvements in alternating current dynamo electric machines
IPC: H02P1/44
Filed: 1931-10-28
Abstract: 375,180. Thermal switches. BOSCH AKT.-GES., R., 4, Militõrstrasse, Stuttgart, Germany. Oct. 28, 1931, No. 29852. Convention date, Nov. 1, 1930. [Class 38 (v).] The auxiliary phase or the phase displacing means of a single-phase motor is connected in circuit by a thermal switch and is switched out on predetermined heating of the switch by the main phase current. In the example shown, the thermal element c in the form of a slotted bimetallic spring bent into an open ring is connected at its fixed ends m in series with the main phase a of the motor. The other movable end of the spring carries a bridge o secured by an insulating piece n, the bridge in the cold position connecting together two contact springs f whereby the auxiliary phase d and condenser z<1> are in circuit. When the spring c is heated by the main phase current, the bridge o is removed from the contacts f. In this position, the auxiliary winding is not cut out, but remains in circuit with a different condenser z<2>. On overloading the motor, the spring c is further heated and the bridge o touches contact springs h connected to the contacts f. Starting circuit conditions are thus re-established. The thermal element and the contacts may be enclosed in a glass flask evacuated or filled with a protective gas.
Patent GB-611729-A (GB)
Title: Improvements in and relating to flushing cisterns for water closets
IPC: E03D1/14
Filed: 1945-11-08
Abstract: 611,729. Valve-discharge water-waste preventers. JORGENSEN, 0. J. Nov. 8, 1945, No. 29855. Convention date, Dec. 19, 1941. [Class 26] In a flush tank of the kind having a discharge valve connected to an external operating device and comprising a float for retaining the valve in its open position when the water level is sufficiently high, provision for the delivery of a large or small flush is made by means of members for coupling the float and valve in its open position, such members being capable of coupling in two different positions by depressing the float to two different levels by means of the operating device. The discharge valve 2 which also serves as overflow pipe, is engaged by the fork of a lever 3 pivoted at 4 and depressed by one or other of the arms 6, 7 of different lengths attached to the .rocking handle 5. A float 9 is carried by a pivoted lever 10 at the other end of which are two notches 11, 12 adapted to co-operate with a projection or latch 8 at the end of the lever 3. On turning the handle 5 clockwise, and then releasing it the short arm 6 presses down on the lever 3 (Fig 3) raising the valve 2 and bringing the latch 8 into coupling connection with the notch 11 and so depressing the float 9. Water is discharged and the water level 14 falls until the up thrust on the float 9 is reduced enabling the notched end to rise, free the latch-notch coupling and so allow the valve 2 to fall and stop the discharge. Similarly a larger flush is obtained by turning the handle 5 counter-clockwise so that the arm 7 depresses the lever 3 (Fig 4, not shown), in which case the notch 12 retains the latch 8 in engagement and the valve 2 open until the water level-falling further than in the previous case-releases the system to close the valve. The cistern may be completely emptied by holding the handle 5 depressed.
Patent GB-344435-A (GB)
Title: Automatic control of compressor pumps
IPC: H01H35/34
Filed: 1929-10-02
Abstract: 344,435. Actuation of switches. MALEY, A. W., 4, Grosvenor Road, and TAUNTON, E. M., 11, Wilton Road, both in Handsworth, Birmingham. Oct. 2, 1929, No. 29868. [Class 38 (v).] Snap-action switches.-In a switch for controlling a compresser motor, contact is maintained between abutting contacts by pressure substantially at rightangles to the direction of the make-and-break movement. A link 5 is pivoted at 6 to a lug 7 on the cylinder casing. Another link 9 pivoted at 10 is connected to the link 5 through a spring 12 and bent link 15. On the pressure falling in the cylinder 1, a diaphragm 2 collapses and a piston rod 4 moves to the left under the action of a return spring 3, carrying the lower end of the link 5 with it. This causes the spring 12 to pass the deadcentre position, throwing over the link 9 which strikes a lug 20 on a lever 18 pivoted at 19 and carrying a movable contact 17. The contact 17 is mounted on an arm pivoted to the lever 18 and the contact pressure is supplied by a spring 22. In operation, the contact 17 is moved suddenly from a dummy contact 23 to a contact 24 of the compresser motor. When the pressure in the cylinder 1 is sufficiently great, the switch is opened in the reverse manner. A modification is described in which there is no lost motion between the links and the contact-lever.
Patent GB-171394-A (GB)
Title: Improvements in or relating to dynamo-electric machines
IPC: H02K47/12
Filed: 1921-11-10
Abstract: 171,394. Somajni, G. Nov. 10, 1920. [Convention date]. Rotary transformers. - A dynamo - electric machine for obtaining a number of lower voltages from a continuous-current supply, has a single armature carrying three separate commutator windings, a, b, a', Figs. 1 and 2, in series across a supply circuit V. The three windings may be superposed in the same slots, Fig. 3, and be connected to commutator segments lying in the same axial plane. If the brushes are in line, commutation takes place simultaneously for all the conductors in a slot, with consequent diminution of reactance electromotive force. Voltages lower than the supply voltage may be obtained by connecting the low-voltage circuit to any pair of terminals A, B, C, D, Fig. 2, and by using different pairs of terminals, a uniform voltage gradient can be obtained. The invention is particularly adapted for electric-motor control, in traction equipments as well as for stationary plants, and the motors may be connected in series, in parallel, or independently to the various low-tension points. With shunt or compound motors, the system permits of regenerative braking.
Patent GB-1520273-A (GB)
Title: Phosphoric acid and gypsum from phosphatic material
IPC: C01B25/22
Filed: 1974-07-06
Abstract: 1520273 Phosphoric acid and gypsum production FISONS Ltd 7 July 1975 [6 July 1974 8 Aug 1974 25 Sept 1974 15 Feb 1975] 30042/74 34963/74 41668/74 and 6493/75 In a wet process phosphoric acid process wherein the phosphatic starting material is treated with acid and calcium sulphate is precipitated and separated off as gypsum sources of aluminium and silica are incorporated into the phosphatic material and/or into the phosphoric acid reaction system so that the weight ratios of total Al 2 O 3 :total P 2 O 5  and total reactive SiO 2 :total F in the reaction mixture at the point of initial precipitation of the gypsum have values within the range 1:75 to 1:10 and 0À1:1 to 1:1 respectively. The sources of Al and SiO 2  may be separate or an aluminium silicate may be used e.g china clay, ball clay, attapulgite clay, montmorillonite, fuller's earth, as well as high aluminium phosphate rock and residues from the beneficiation of phosphate rock. Calcium sulphate dihydrate crystals are produced by the above process at least 50% by weight of which have a length to breadth ratio in the range of from 1:1 to 3:1, a mean thickness of from 3 to 10 micrometres and at least 15% by weight of them are in the form of twinned crystals.
Patent GB-903639-A (GB)
Title: Process for the production of 3-methyl-5-amino-pyrazole and the resulting product
Filed: 1959-09-03
Abstract: 3-Methyl-5-amino-pyrazole is prepared by reacting a compound of the formula CH3.(:X).CH2CN (wherein X represents oxygen or an amino group) with a hydrazine carboxylic acid ester to form a cyanoacetone hydrazone-N-carboxylic acid ester of the formula ROOC.NH-N:C(CH3).CH2CN (where R is, for example, methyl, ethyl, propyl, benzyl or phenyl) and either treating the latter with caustic alkalies (e.g. alkali metal or alkaline earth metal hydroxides) to effect ring closure, saponification of the carboxylic acid ester group and decarboxylation, or treating the hydrazone with mild alkalies (e.g. alkali metal carbonates) to effect ring closure to form 3-methyl - 5-aminopyrazole - 1-carboxylic acid ester and saponifying and decarboxylating this latter compound with caustic alkalies.
Patent GB-1469073-A (GB)
Title: Optical fibre
IPC: G02B6/00
Filed: 1975-07-17
Abstract: 1469073 Optical fibre STANDARD TELEPHONES & CABLES Ltd 17 July 1975 30095/75 Heading C1M An optical fibre made by drawing down a preform comprises a cladding enveloping a core made by a chemical vapour reaction, the core comprising a central region of substantially constant diameter and composition, and terminal regions of increasing diameter and graded composition, the graded composition being such that the core/cladding refractive index difference decreases towards the fibre ends, and being matched with the increasing core diameter so as to provide a normalized frequency within limits which provide the central region and terminal regions with the same single bound non-radiating mode or the same set of bound non-radiating modes. The core material is preferably deposited (by a thermally induced reaction from which hydrogen or its compounds are excluded) in the bore of a tube of lower refractive index cladding glass (the tube is preferably itself formed by vapour reaction on the interior of rotating tube 1 of silica glass). The gas reaction mixture passes through the tube from 4 to 5, the core thickness being varied by varying temperature or flow rate of the gas, and the composition varied by means of the gas composition. The reaction is induced by flame zone 6 which traverses the tube (e.g. to give a temperature of at least 1500‹ C.). The core may have a central diameter of about 3 Á and a terminal diameter of about 30 Á, and the central refractive index difference may be 1% compared with a terminal difference of 0À01%. Reference has been directed by the Comptroller to Specification 1,427,327.
Patent GB-1107048-A (GB)
Title: Improvements relating to vibratory sieves and conveyors
IPC: B07B1/46
Filed: 1965-07-15
Abstract: 1,107,048. Screening apparatus. A. WEHNER. 15 July, 1965 [21 Oct., 1964], No. 30111/65. Addition to 1035711. Heading B2H. [Also in Division B8] The vibratory screening machine of the parent Specification for producing a semicircular forward movement of a screen 15 and a horizontal return movement is modified by arranging for the secondary set of supporting members 5 for carrying the screen back to its initial position to be practically stationary so that there would be in this case a relative sliding 'between the members and the screen. A primary set of supporting members 10 carry driving pins 11 and are mounted in a frame 9 which is driven by an eccentric 12 or out-of-balance shaft and mounted or rubber buffers 7 on a resiliently-mounted base 2. The secondary set of supporting members 5 are carried between upright supports 4 which are secured at their bottom ends to the base 2. The screen 15 is carried, or formed by,'a frame of plastic material provided both with holes (16) Fig. 3 (not shown) for engaging the driving pins 11 and with grooves 15<SP>1</SP> on its underside for slidingly engaging members 6 on the supporting members 5; the sliding parts may be provided with rollers, yielding springs, self-lubricating surfaces or with brake linings for causing supplementary vibrations. If desired, screening rods may be received in holes and either clamped or mounted with a clearance for movement in the holes.
Patent GB-714868-A (GB)
Title: Improvements in or relating to polymerisation products
Inventor: YARSLEY VICTOR EMMANUEL
IPC: A61K6/083
Filed: 1951-12-24
Abstract: Methyl methacrylate is bulk polymerized in admixture with a methyl methacrylate polymer in the presence of a mercaptan accelerator, such as tert.-dodecyl or tert.-hexadecyl mercaptan, a peroxide catalyst, such as benzoyl or lauroyl peroxide, and at least a trace of a copper compound, for example copper oxide, sulphate, methacrylate, or oleate.  The speed of polymerization may be increased by incorporation of an acid, preferably a polymerizable acid, such as acrylic, methacrylic, or beta, beta-dimethacrylic acid.  The methyl methacrylate monomer may contain a stabilizer such as hydroquinone, and may also be used in conjunction with minor proportions of other monomers containing a vinylidene group, for example vinyl acetate, styrene, alpha-methyl styrene, chlorostyrene, vinyl methacrylate, diglycol methacrylate, acrylonitrile, and vinylidene chloride.  The polymeric component may be homopolymeric methyl methacrylate or a copolymer of methyl methacrylate with a minor proportion of another monomer containing a vinylidene group, such as styrene and chlorostyrene.
Patent GB-1237177-A (GB)
Title: Wiper-blade assemblies for windscreens of motor vehicles
IPC: B60S1/38
Filed: 1969-06-16
Abstract: 1,237,177. Windscreen wipers. DUCELLIER ET CIE. 16 June, 1969 [18 June, 1968], No. 30373/69. Heading A4F. In a windscreen wiper blade assembly having a wiper element carried by a main yoke pivotally connected to at least two intermediate yokes, a connecting member 6, e.g. of synthetic resin, has grooves 8 (Fig. 6, not shown) receiving flanges 9 (Fig. 3, not shown) on the back of each intermediate yoke 4 and engages between side flanges of a second intermediate yoke or of the main yoke 3, all the flanges being aparallel, and a pivot pin 7 extending therethrough and through the member 6. The member 6 has a slot 14, which engages the edge of an aperture in the rear wall of the yoke 4, and a hook portion which engages in a further aperture in said rear wall. The pivotal movement between the yokes 3, 4 is limited by the engagement of an end of the yoke 3 with a shoulder 15 on the member 6.
Patent GB-648947-A (GB)
Title: Improvements in or relating to lifting and moving appliances
Inventor: RYLAND WILLIAM HENRY
IPC: E04G23/06
Filed: 1948-11-24
Abstract: 648,947. Load-handling apparatus. SMITH BROS. (CHELTENHAM), Ltd. Nov. 24, 1948, No. 30470. [Class 78 (iii)] [Also in Group XXXII] An appliance for lifting and moving heavy objects such as poultry houses comprises a U-shaped frame 6, the limbs 7 of which carry a pair of wheels 11 and are spaced at a greater distance than the width of the object so that the appliance may be placed with its limbs 7 extending along the sides of the object, hooks 16 on the limbs being engaged beneath abutments on the object so that the limbs form lever arms with the wheel mountings as fulcrum points whereby when the end 8 of the frame is depressed, the object is raised so as to be supported by the wheels and a strut 20 pivotally mounted at 21 on the limbs 7 is moved so as to engage beneath an abutment on the end of the house to maintain the latter in position on the limbs. The strut may be turned about its hinges to a collapsed position in which its side limbs lie along the limbs 7 and its cross-bar 19 adjacent the cross-bar of the main U-frame. When turned from this position, it is arrested in a position in which it stands at slightly more than a right angle to its collapsed position by the lower ends of its side limbs 18 engaging the upper surfaces of the limbs 7.
Patent GB-536819-A (GB)
Title: Improvements in the separation of olefins from gaseous mixtures and in the storage of such olefins
IPC: C07C11/02
Filed: 1939-11-21
Abstract: 536,819. Separation and storage of olefines. STANDARD OIL DEVELOPMENT CO. Nov. 21, 1939, No. 30482. Convention date. Dec. 30, 1938. [Class 2 (iii)] Olefines containing two to four carbon atoms are separated from hydrocarbon mixtures by treatment with an aqueous ammoniacal solution of cuprous benzene sulphonate at a temperature below 30‹C. and recovering the olefine from the resulting addition compound by the application of heat or reduction of the pressure. The formation of the addition compound may be used' for storing the olefines, which are then passed, if desired under pressure, into a vessel containing the aqueous ammoniacal cuprous benzene sulphonate solution. Ethylene, propylene, butylenes and 1:3-butadiene are specified and absorption temperatures of -10‹ to 25‹C. are stated to be preferable. The cuprous benzene sulphonate solution is prepared by adding an excess of ammonia to a solution of benzene sulphonic acid and saturating with cuprous oxide. Specification 324,897, [Class 2 (iii)], is referred to.