baber/WOPTO huggingface dataset:
Patent GB-1345403-A (GB)
Title: Servosystem for tachographs
IPC: G01P1/12
Filed: 1971-04-19
Abstract: 1345403 Controlling DC motors KIENZLE 19 April 1971 [24 Feb 1970] 27320/71 Headings G1U U5M4A4A and U5M4F4 A servosystem for measuring the speed of a vehicle comprises an operational amplifier 5 having a differential stage which compares a D.C. voltage from a variable input with the feedback voltage from a reversible servomotor and an output stage which has a duplicate transistor push-pull circuit for controlling rotation of the servomotor. A pulse generator G fitted to a vehicle gear-box shaft produces voltage pulses which are fed into the operational amplifier at A, while feedback voltage from the servomotor 6 is fed in at B, pointers 12, 13 of a recorder and indicator drive by the servomotor being mechanically linked to the slide 20 of a potentiometer 19 so that the input at B is dependent upon the position of the servomotor. When the inputs are equal the amplifier output C is such that the voltage at D equals that at E and the servomotor remains stationary. If the voltage at A is higher due to an increase in engine speed then the amplifier output C renders a transistor 23 less conducting and transistors 22 and 31 more conducting; the change of state of transistor 31, which acts as a switch, reduces the base voltage on transistors 24 and 25 to render them less and more conducting respectively, so that a control current flows along the path 39-22-6-25-40 to rotate the servomotor. The e.m.f. generated by the servomotor is used to prevent over-run by controlling the transistors 22-25 as emitter followers, so that their conductivities are changed to cause a damping current to flow in opposition to the drive current. If the voltage at input A is lower, the output C is lower and a control current flows along the path 39-24-6-23-40.
Patent GB-228599-A (GB)
Title: Process for the melting of metals for the coating of metal articles with protecting metals and for soldering
IPC: H05B3/00
Filed: 1923-10-31
Abstract: 228,599. Sperling, M. Oct. 31, 1923. Dry processes of refining metals.-Metals to be melted are covered by a salt bath which acts as a medium for interchange of heat between the metal and resistance heating elements formed by conductive masonry L built into the furnace walls. The salt bath may be composed of the halogen compounds, carbonates, borates and oxides of the alkalis, earth alkalis and light metals such as aluminium. By using reducing agents such as fine coal, calcium carbide or calcium cyanamide the metal to be melted is prevented from becoming enriched with oxides and these agents further serve to remove sulphur and dissolved sulphides and halogen compounds of the heavy metals.
Patent GB-832357-A (GB)
Title: Improvements relating to handles
Inventor: ELLS EDWARD WILLIAM FRANK
IPC: A47J45/08
Filed: 1956-09-06
Abstract: 832,357. Handles for utensils. STADIUM Ltd. Sept. 6, 1957 [Sept. 6, 1956], No. 27351/56. Class 66. A hand grip for fitting round the steel handle 6 of a kettle comprises two parts 2, 4 secured to one another by relative longitudinal movement. The part 4 has longitudinal beads 8 which engage in grooves 10 in the part 2, and dimples 7, 9 on the handle 6 fit into depressions in the part 2. A bow spring 12 is spot welded to the handle 6 at 14, 16, the ends 18, 20 of the spring engaging with shoulders 22, 24 of recess 26 in the part 4, and, when the spring is flexed towards the handle 6, entering holes 28, 30 in the handle. The part 4 is placed under the handle 6 for assembly, the spring 12 being flexed to allow the part 2 to ride over the dimples 7, 9.
Patent GB-949571-A (GB)
Title: Improvements in or relating to core binders
Inventor: PARKES ERIC
IPC: B22C1/16
Filed: 1960-08-06
Abstract: A binder for moulding sand comprises: Sugar, 20-25% (by wt.) Gum arabic, 10-50% Powdered urea-formaldehyde resin 10-25% Boric acid 3-8% Paraffin may be used as an inert vehicle for the powdered solids and the curing properties are improved by the addition of 1 to 3% of ammonium sulphate or nitrate.
Patent GB-1463500-A (GB)
Title: Wheelchairs
IPC: A61G5/04
Filed: 1973-06-09
Abstract: 1463500 Drive for wheelchairs H CRAGG 10 June 1974 [9 June 1973] 27553/73 Heading B7H [Also in Divisions F2 and A4] An electric drive unit for a wheel chair includes a plate 41 rotatably mounting a wheel 2 having a pinion 40 fixed thereto, a gear carrier 65, 66 supporting at least one of idler gears 70 and 74, 75, and an electric motor (51), (Fig. 3, not shown) drivingly connected to a pinion 62, the gear carrier being mounted for rotation so that the or each idler gear may be selectively moved into and out of engagement with pinions 40, 62. The motor drives pinion 62 via worm 53 on motor output shaft 52 and a worm-wheel on the pinion shaft 57. Idler gear 70 is in constant mesh with pinion 40, as is gear 75 of the stacked gear 74, 75; on rotation of the carrier to either side of a neutral position gear 70 or 74 engages pinion 62, the carrier being moved by cam 76. Gears 70 and 74, 75 are of different transmission ratio and the carrier may be locked in its neutral or operative positions. The wheel chair may be laterally collapsed.
Patent GB-444598-A (GB)
Title: Improvements in or relating to electrical signalling systems employing speech or voice current signals
IPC: H04B3/20
Filed: 1934-09-26
Abstract: 444,598. Two - way transmission. RYALL, L. E., 52, Crescent Gardens, Eastcote, Ruislip, Middlesex. Sept. 26, 1934, No. 27623. [Class 40 (iv)] Two circuit arrangements comprising rectifiers and condensers are described for distinguishing b e - tween speech and noise in the control of directional switching. In one arrangement, Fig. 1, incoming speech signals rectified by R1 produce a variable potential across condenser C1 so that a pulsating current is transmitted through T2 and after being rectified by R2 produces a difference of potential across condenser C2 to effect the desired control. Noise currents, however, being of constant amplitude produce a steady difference of potential across C1 and no current through T2. In the second arrangement, Fig. 2, transformer T3 has two secondary windings each having associated with it two rectifiers for full wave rectification and two condensers. Condensers C3, C4 are arranged to charge rapidly and discharge slowly whilst condensers C5, C6 are connected to a further condenser C7 which by reason of its connection through rectifier R7 charges slowly and discharges quickly. The two branch circuits are connected differentially to the output circuit and the arrangement is such that steady noise acts equally on both branches and its effects are therefore balanced out whilst the fluctuations in speech produce immediate potential changes across C3 and C4 but practically negligible change in C7. Specifications 415,767, 416,372, 430,158, and 430,567 are referred to.
Patent GB-208837-A (GB)
Title: Improvements relating to friction clutches
IPC: F16D13/74
Filed: 1922-10-12
Abstract: 208,837. Wallace, W., and British Hele-Shaw Patent Clutch Co., Ltd. Oct. 12, 1922. Clutches, friction, of the multiple-plate or Hele-Shaw type. The resistance to displacement of an annular band of lubricant L forced by eentrifugal force against the interior of the driving clutch casing A is utilized to ensure the gradual and even movement of the parts which effect the engagement of the friction surfaces. The main pressure plate D or a friction plate adjacent thereto has a connection with the inside surface of the casing A sufficiently fluid-tight to ensure that resistance to leakage of the lubricant will render the said movement even and gradual. Several ways of making this connection are described.
Patent GB-1430027-A (GB)
Title: Contact piece for a cable-like heating element
IPC: H05B3/04
Filed: 1973-06-11
Abstract: 1430027 Cable terminations PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 11 June 1973 [14 June 1972] 27676/73 Heading H2E A termination for a mineral-insulated heating element 1 comprises a pin 6 and a metal body 5B, both soldered during manufacture to a ceramic portion 5A. A watertight connection to the element 1 can be made on-site, the only joints needed being metal to metal joints at 6C and 8, which as shown in Fig. 1 are welded and soldered respectively after crimping. An insulating bead 7 centres the conductor 2. In Fig. 2 the metal body for fixing to the sheath 3 comprises a three part compression gland 5C, 5D, 5E, the pin 6 is soldered to the conductor 2 and a surrounding cuff 6E is provided. For temperatures below 300‹ C. the part 5A may be of synthetic resin and be glued to the metal parts.
Patent GB-303590-A (GB)
Title: Improvements in the manufacture of stop valves
IPC: F16K27/10
Filed: 1927-10-19
Abstract: 303,590. Mitton, E. J., and Chadderton, E. Oct. 19, 1927. Valves. - Stop valve bodies are formed in two or more longitudinal sections by forging or stamping and the sections are subsequently welded together, the body having separately formed encircling flanges secured thereto by welding. In one construction the valve body is formed in halves, the abutting edges 3 being bevelled or otherwise shaped to form a groove to receive the welding material 4. The flanges are formed as separate rings 5 bevelled or cut away internally at 6 to provide a larger surface for the welding material.
Patent GB-963461-A (GB)
Title: Improved asphalt agricultural mulch
IPC: C08K5/00
Filed: 1962-07-19
Abstract: An agricultural mulch comprises an oil in water emulsion of an asphalt and contains one or more growth promoting compounds, herbicides or pesticides.  The emulsion may contain 20 to 60% by weight of asphalt and 0.00004 to 2.66 grams per U.S. gallon of gibberellic acid or 0.2 to 6.0% by weight of a herbicide. Germination and growing conditions of seeded or planted areas in arid regions, are improved by applying the mulch which conserves moisture in the soil.  Examples are given of asphalt emulsion containing ethyl di-N-propyl formamide, a -chloro-N,N1-diallyl acetamide and gibberellic acid. Other herbicides and suitable emulsifying agents are listed.ALSO:An agricultural mulch comprises an oil in water emulsion of an asphalt and contains one or more growth promoting compounds, herbicides or pesticides.  The emulsion may contain 20 to 60% by weight of asphalt and 0.00004 to 2.66 grams per U.S. gallon of gibberellic acid or 0.2 to 6.0% by weight of a herbicide. Germination and growing conditions of seeded or planted areas in arid regions, are improved by applying the mulch which conserves moisture in the soil.  Examples are given of asphalt emulsions containing ethyl di-N-propyl formamide, a -chloro-N,N1-diallyl acetamide and gibberellic acid. Other herbicides mentioned are N-1-naphthyl phthalamic acid and its sodium salt, 4,6-dinitro ortho secondary butyl phenol and its amine salts, 3-(3,4-dichlorophenyl)-1,1-dimethylurea, 3-(p-chlorophenyl)-1,1-dimethylurea, 2-chloro-(4-ethyl amino, 6-isopropyl amino)-S-triazine, 2-chloro-4,6-bis-(ethyl amino)-S-triazine, 2,4-dichloro phenoxy acetic acid, sodium 2,4-dichlorophenoxyethyl sulphate, 2,2-dichloropropionic acid, isopropyl N-phenylcarbamate, isopropyl N-metachlorophenyl carbamate, sec.-butyl N-(3-chlorophenyl) carbamate, sec.-butyl N - phenyl carbamate, ethyl-N,N-di-n-propyl thiolcarbamate, butyl-N,N-di-n-propyl thiolcarbamate, 2,3-dichloroallyl diisopropyl thiolcarbamate, 2 - chloroallyl - diethyl-dithiocarbamate, a -chloro-N,N-diallylacetamide, a -chloro-N,N - diethylacetamide and a ,a  - dibutyl -N,N-diisopropylphosphenic amide.
Patent GB-1498599-A (GB)
Title: Mowing apparatus
IPC: A01D34/73
Filed: 1976-07-05
Abstract: 1498599 Mower SHIKUTANI KK 5 July 1976 [4 July 1975] 27867/76 Heading A1F A cutterhead assembly for a portable rotary mower having a power-driven shaft 30, comprises two discs 24, 26 sandwiching a flat coil 22 of nylon, or other high molecularweight polymer, monofilament, each turn of the coil being connected to the adjacent turn either by heat bonding, adhesive, a backing sheet or by the web remaining after injection moulding in order to restrain uncoiling. The free outer end 20 extends through a port 44 and may periodically be pulled off the coil to replace worn material, the coil then being clamped between the discs 24, 26 by turning a nut element 34 on a bolt 32 the head 36 of which fits snugly into a similarly shaped recess 34 in the disc 24 to prevent relative motion therebetween More than one coil with a corresponding number of equidistant ports 44 may be sandwiched coaxially between the discs 24, 26. Relative rotation between discs 24, 26 may be avoided either by co-operating ears 60 and recesses 62 (Fig. 10) or by a non-circular hub 74 fitting a similarly shaped bore 76, shown in Fig. 12, which also shows a rubber-covered 72 abutment 70 for the free end 20.
Patent GB-293435-A (GB)
Title: Improvement in method of producing nitrated carbohydrate solutions
IPC: C09D101/18
Filed: 1927-10-20
Abstract: 293,435. Hercules Powder Co., (Assignees of Peters, G. H.). July 8, 1927, [Convention date]. Lacquers.-Nitrated carbohydrates (nitrocellulose, nitro-starch, &c.) freed from excess water, but not completely dehydrated are dissolved in solvents immiscible with water. The solution is subsequently dehydrated by centrifuging, addition of a hygroscopic substance, or other suitable means, or it may be simply applied as a coating whereupon the water evaporates simultaneously with the solvent. The solution may contain other ingredients such as water immiscible diluents, gums, oils pigments, &c. An example of a solution suitable as a lacquer contains 10¢ parts of nitrocotton with which are associated 4¢ parts of water, 30 parts of butyl acetate, 42¢ parts of toluol, 7¢ parts of ester gum, and 5 parts of tricresyl phosphate. Other suitable solvents are amyl acetate, butyl propionate; other diluents are mineral spirits, turpentine &c. Specification 293,434 is referred to.
Patent GB-279839-A (GB)
Title: Improved pneumatic tyred vehicle wheel
IPC: B60C15/02
Filed: 1927-10-21
Abstract: 279,839. Tubaroa, L. Oct. 26, 1926, [Convention date]. Tyre attachments to rims; non- metallic elastic bodies and cores. -The edges of a tubeless tyre D are clamped between a pair of wheel discs A, B and a rubber ring C. fitted with an inflating- valve c. The ring C is adapted to form a running surface without the tyre D.
Patent GB-286753-A (GB)
Title: An angle measuring refractometer
IPC: G01N21/41
Filed: 1926-11-09
Abstract: 286,753. Everitt, W. Nov. 9, 1926. Refractometers.-The refractivity of liquids, solutions, oils, &c. is determined by applying a portion of the liquid to the surface of a transparent prism P mounted in a cylinder I forming the moving part of a ball race. The centre of one side of the prism P coincides with the axis of rotation and the amount of rotation of the cylinder I is indicated by a pointer moving over graduations on the outer fixed cylinder O of the journal. The liquid is viewed through the prism P by an eyepiece E, the prism P being rotated until disappearance of the liquid results by reason of total reflection at the surface of the prism. The liquid may be applied under a square microscope cover slip. Specification 178,290 is referred to.
Patent GB-1184584-A (GB)
Title: Improvements in or relating to Work Follower Rests.
IPC: B24B41/06
Filed: 1967-06-20
Abstract: 1,184,584. Grinding. BABCOCK & WILCOX CO. 20 June, 1967 [19 Aug., 1966], No. 28302/67. Heading B3D. A back-up support for supporting intermediate portions of a workpiece W when operated on by a machine having means 11, 12 for supporting the workpiece for rotation and means for moving a tool 13 transversely to the axis of rotation, comprises a follower rest 15, means 16 for mounting the rest for movement towards the workpiece in a direction opposite to the movement of the tool towards the workpiece, an arcuate work engaging surface 21 having at least one pressure pocket 25 therein, a restrictor 26 associated with each pocket, and means for supporting liquid under pressure to each restrictor whereby, when the rest is positioned adjacent the workpiece, a pressurized film of liquid supports the workpiece to oppose the forces applied by the tool. As described, the tool is a grinding wheel 13 which is mounted on a slide movable transversely of the workpiece rotated between a headstock 11 and tailstock 12. The follower rest 15 is movable by a spring or fluid pressure device along a slide 16 and the arcuate surface 21 has portions 22, 23, 24 formed with pockets 25 supplied with fluid pressure through restrictions 26, the portion 24 being of lesser radius than the portions 22, 23 so that as the diameter of the workpiece is reduced, the portions 22, 23 become less effective and support is provided mainly by the portion 24. Also, as the grinding wheel moves towards the workpiece, the follower rest is moved by the spring or fluid pressure device towards the workpiece. The fluid supplied may be the coolant for the machine. In another embodiment, the rest consists of hinged sections 41, 42, Fig. 7, urged together by a spring 47, each section having a pressure pocket 45. In a further embodiment, the pressure pockets are formed in shoes spring-urged towards the workpiece and retained in the rest by pins. In other embodiments, the rest has a single pressure pocket or a number of pressure pockets supplied with fluid through a common restrictor.
Patent GB-373523-A (GB)
Title: Improvements in or relating to self-contained life saving breathing appliances
IPC: A61M16/00
Filed: 1931-10-12
Abstract: 373,523. Respirators. DAVIS, R. H., 187, Westminster Bridge Road, London. Oct. 12, 1931, No. 28321. [Class 81 (ii).] In closed-circuit respiratory appliances wherein oxygen is delivered from a cylinder through a pipe 1 containing a valve 11 and thence through a right-angled connection pipe 2 and a reducing valve to the breathing bag, the reducing valve being byepassed by a pipe 8 controlled by a thumb-operated valve, loosening of the connection-piece 12 between the pipes 1, 2 is prevented by providing the casing 7 of the byepass valve with an extension piece 24 straddling the pipe 1 as at 25 or otherwise engaging the pipe 1 or a member rigidly secured thereto. The byepass valve comprises a pad 14 carried by one arm of a bell-crank lever 16 the other arm 18 of which is formed with a thumb-piece. The casing 7 has a lateral aperture 19 closed by a flexible diaphragm 22 immediately over the thumb-piece the whole forming a guard preventing accidental opening of the valve. A spring 20 within the casing maintains the valve-pad 14 normally in closing contact with the orifice of a jet 5 communicating with the pipe 2.
Patent GB-792899-A (GB)
Title: Catalyst and process for preparing and using the same
IPC: C08F2/54
Filed: 1956-09-17
Abstract: A hydrocarbon conversion catalyst, for alkylation, cracking, isomerization and polymerization reactions &c. comprises a 0.2 per cent to 10 per cent by weight solution of a catalyst which is a hydrocarbon-soluble compound of the metal in a liquid hydrocarbon irradiated with a total energy input between 0.5 and 5000 watt hours preferably 5 to 5000 watt hours, of radiation per mg. of solution usually conducted for a period of time 0.1 to 10 hours and preferably at a temperature of -17 DEG  to 70 DEG  C.  The metals are titanium, vanadium, chromium, iron, cobalt, zirconium, tin, tungsten and platinum.  The compounds may be halides or mixtures of two or more halides or organic compounds of said metals such as chelates, e.g. acetyl acetones, dithiazones, 8-hydroxy quinolines, prophyrins and naphthenates and organic acids such as octanoates.  Organic/inorganic mixtures may also be used.  Solvents are hydrocarbon solvents such as paraffinic and naphthenic hydrocarbons, including hexanes, octanes, nonanes, cyclohexane, mono and polyalkyl cyclohexanes and mixtures thereof.  N-heptane is preferably used as a solvent.  The solution should be substantially free from water and oxygen and may be irradiated in an inert atmosphere.  Polymerization reactions specified are the polymerization of ethylene, propylene, butylene and mixtures of same.ALSO:Ethylene, propylene, butylene and mixtures thereof are polymerized with a catalyst consisting of a 0.2 to 10 per cent hydrocarbon solution of a compound of titanium, vanadium, chromium, iron, cobalt, zirconium, molybdenum, tin, tungsten or platinum, which solution has been irradiated with a total energy input between 0.5 and 5000 watt hours of radiation per kilogram of solution, whereby ion-pairs are formed.  Hydrocarbons specified are paraffinic and naphthenic hydrocarbons such as hexanes, heptanes, octanes, nonanes, decanes, cyclohexanes, alkyl cyclohexanes and mixtures thereof, preferably purified by refluxing over sodium to remove water and oxygen.  Catalyst compounds specified are chlorides, bromides, iodides, fluorides, oxychlorides; chelate compounds such as acetyl acetonates, thiozones, and 8-hydroxy quinolines; porphyrins such as tetraphenyl porphyrins, naphthenates, octanoates and mixtures of the above.  The radiation, which may be carried out in situ and intermittently, if desired, may be effected by electrons, b - or g -rays, a -particles, X-rays, bremsstrahlung, tritons, deuterons, protons, neutrons, mesons, or fission, fusion or spoilation products. In examples, ethylene or propylene are continuously passed into the catalyst solution and the reactions are terminated and the products washed with methyl or isopropyl alcohol, and acetone.
Patent GB-242988-A (GB)
Title: Improvements in the construction of stairs
IPC: E04F11/025
Filed: 1925-11-11
Abstract: 242,988. GrÚgoire, F. P. R., and Cior, L. Nov. 12, 1924, [Convention date]. Stairs are formed of slab treads 1 and risers 2 which are supported by a racked wall stringer 6 and an outer stringer beam 8; a carriage stringer beam 10 may be added. The wall stringer may consist of plaster blocks nailed to the wall, or it may be a precast reinforced-concrete stringer. The beams 8, 10 are metal and T-shaped. The treads 1 are secured by hooks 16, 17 engaging rods 12, 12<1> which pass through the beams. Plaster fillets 13 enclose the rods, and shaped blocks 18 are placed on edge beneath the treads. Blocks 21, 22 are placed in the outer cells, blocks 23 on the soffit face, and a plaster covering 25 is added.
Patent GB-290311-A (GB)
Title: Improvements in and relating to alternating current commutator motors
IPC: H02K27/02
Filed: 1926-11-11
Abstract: 290,311. British Thomson-Houston Co., Ltd., and Dreghorn, H. Nov. 11, 1926. Alternating - current commutator machines windings.-In an alternating current mtor of the type described in Specification 25358/11 having a multiplex armature winding, the separate windings have different pitches to avoid local circulating, currents and are connected by equipotential connections located outside the magnetic circuit. In the duplex winding shown, one winding element having a slot pitch of 1-7 is connected to commutator segments 1, 3, 5 &c. and the other having a slot pitch 1-6 to intermediate segments 2, 4, 6 &c. and the backs of the coils of the former are connected to the commutator segments of the latter by connections b of small section located, for example, under the core between the rotor arms. Equalizer connections are joined to the same segments as the equipotential connections: if a full number of equalizers is employed, equipotential connections over a range of two poles only need be used. Specification 24992/07 also is referred to. The Provisional Specification describes also a single armature winding in which the backs of the coils are connected to commutator segments located between the main segments joined to the ends of the coils.