baber/WOPTO huggingface dataset:
Patent GB-573527-A (GB)
Title: Improvements in the synthesis of secondary and tertiary ethinyl-carbinols
IPC: G01R31/36
Filed: 1941-04-18
Abstract: Secondary and tertiary ethinyl carbinols are produced by the reaction of calcium carbide on aldehydes or ketones in the presence of an alkali metal hydroxide and of a solvent of the type <FORM:0573527/IV/1> where R1 and R2 are alkyl groups and R3, R4, R5 and R6 are hydrogen or alkyl groups. Suitable solvents are methylal, acetal, butyraldehyde dibutyl acetal, ethylene glycol dibutyl ether, and propylene glycol diethyl ether.  An example describes the production of 3-methyl butinol-3 and tetramethyl butindiol from acetone, calcium carbide, potassium hydroxide and methylal. Butyraldehyde dibutyl acetal is made by reacting butyraldehyde with butyl alcohol in the presence of hydrogen chloride in butyl alcohol.
Patent GB-350896-A (GB)
Title: Improvements in and relating to resinous condensation products
IPC: C08G8/28
Filed: 1930-02-15
Abstract: Phenol-aldehyde condensation products are made by condensing a phenol, formaldehyde and tung oils (raw or bodied) or castor oil, or mixtures thereof, with or without the addition or colophony or other natural resins, in a closed vessel in the absence of a catalyst.  The thick coarsely dispersed emulsion is then dehydrated in vacuo to obtain a viscous liquid or semi-solid mass which may be further heat-treated.  The products can be dissolved in a suitable solvent, such as benzol or solvent naphtha to produce a varnish.  In an example commercial cresol (containing about 50 per cent m-cresol), tung oil and formaldehyde are condensed together in a sealed vessel and dehydrated to give a product which may be dissolved in solvent naphtha.ALSO:Phenol-aldehyde condensation products are made by condensing a phenol and formaldehyde and tung oil (raw or bodied) or castor oil or mixtures thereof, with or without the addition of colophony or other natural resin, in a closed vessel in the absence of a catalyst.  The thick coarsely dispersed emulsion is then dehydrated in vacuo to obtain a thick viscous liquid or semi-solid mass which may be further heat-treated.  The products can be dissolved in a suitable solvent, such as benzol or solvent naphtha to produce a varnish.  In examples (1) commercial cresol (containing about 50 per cent m-cresol), tung oil or "bodied" tung oil (obtained by heat treatment), or castor oil, or tung oil and castor oil and formaldehyde are condensed together in a sealed vessel and dehydrated to give a product which may be dissolved in solvent naphtha; (5) phenol, castor oil and formaldehyde or (6) commercial xylenol, tung oil and formaldehyde are condensed as in example 1.
Patent GB-777033-A (GB)
Title: Improvements relating to the transmission of power
IPC: F15B15/06
Filed: 1953-02-25
Abstract: 777,033. Hydraulic transmission of power. ANDREW, W. R. May 24, 1954 [Feb. 25, 1953], No. 5338/53. Class 69 (2). A power transmission device comprises a driving shaft T carrying partially toothed pinions N, P, which are 180 degrees out of phase, engaging racks K, L connected to rods D, E, the rods carrying pistons A, B sliding in cylinders of a U-shaped body C, the racks also engaging a further pair of partially toothed and out of phase pinions M, O mounted on the driven shaft U. A loadable ram and cylinder connection S maintains hydraulic pressure in the body C. A toothed wheel F engaging racks J, H on the rods D, E ensures synchronism of the pistons A, B.
Patent GB-1360198-A (GB)
Title: Zirconia fibres
IPC: D01F9/08
Filed: 1971-05-21
Abstract: 1360198 ZrO 2  fibres IMPERIAL CHEMICAL INDUSTRIES Ltd 21 May 1971 [19 June 1970 10 Feb 1971] 05391/74 and 5392/74 Divided out of 1360197 Heading C1A ZrO 2  fibres containing Al 2 O 3  and Y 2 O 3 , preferably in amounts of 0À2-20% and 2-15% by wt. respectively, may be produced by spinning a solution containing the metal compounds and an organic polymer and having a viscosity of at least 1 poise, and heating the fibres to form the oxides. The metal compounds may be chlorides, sulphates, acetates, formates, hydroxides, phosphates, or nitrates, or the basic salts. The exemplified polymer and solvent are polyvinyl alcohol and water; others are listed. The solution may be concentrated by evaporation and formed into a continuous filament by extrusion through a spinneret or into short fibres by extrusion into 2 converging gas streams which may contain the solvent vapour, e.g. humid air, the fibres being collected as a felt. The fibre may be heated at 100-2000 C. to decompose the metal compounds and polymer, and the oxide may then be sintered at 500-2000 C. The ZrO 2  may be tetragonal or cubic and the fibres may have a diameter of ¢-50 Á. Other additives and treating agents for the fibres are as described in Specification 1,360,197.
Patent GB-433787-A (GB)
Title: Improvements in and relating to illuminating devices
IPC: H01K1/32
Filed: 1934-02-19
Abstract: 433,787. Electric incandescent lamp bulbs and filaments; lenses and reflectors. RIVIER, L., O'Oche, Jouxtens, MÚzery, Vaud, Switzerland. Feb. 19, 1934, No. 5393. Convention date, Feb. 22, 1933. [Classes 39 (ii), 75 (ii), and 75 (iv)] An illuminating device comprises two or more spaced light sources disposed at equal distances from, and in a plane perpendicular to, the central axis of a reflector in the shape of a surface of revolution, the light sources being so disposed between the axis and the surface of the reflector that those portions of the surface which are nearest each light source reflect each a luminous flux containing parallel rays and having a maximum of intensity in the direction of the parallel beam. As shown, a spherical bulb 1 contains two light sources 2 formed of coiled portions of a single filament. The lower half 1<a> of the bulb is silvered and the filaments 2 form parallel beams a, b with the nearest portions of the bulb. A modification having four coiled filament portions is described. The Specification as open to inspection under Sect. 91 comprises also the following subject-matter : (1) An annular filament is arranged in a lamp-bulb having a hemispherical reflecting portion. A cone of parallel rays is obtained which may be converted into a plane beam by a prismatic refracting ring 8, Fig. 9 (Cancelled). (ii) A lamp bulb has an elliptical reflecting portion and a filament extending along the axis, to produce a cone of parallel rays, Fig. 10 (Cancelled) (not shown) ; or a tubular lamp within an elliptical reflector may be similarly used. (iii) One or more light sources may be rotated about the axis of a reflector to increase the illuminated area. (iv) As shown in Fig. 11 (Cancelled), a lamp bulb has two ellipsoidal reflecting portions 27, 29 having a coincident focus 25 and other foci 26, 31 respectively. The filament extends from 25 halfway to 31. The arrangement is said to produce a hollow cone of parallel rays, which is' refracted by a glass cone 35 to form a parallel beam. The portion 29 is depressed to permit passage of the rays normally through the envelope. This subject-matter does not appear in the Specification as accepted.
Patent GB-1514032-A (GB)
Title: Baths and basins
IPC: A47K3/16
Filed: 1976-02-11
Abstract: 1514032 Basin, bath &c. supports &c. ROHM GmbH 11 Feb 1976 [14 Feb 1975] 05437/76 Heading A4N A basin, bath or shower tray &c. is provided with a resilient rim 8 extending downwardly into contact at 6 with a rigid support frame 2, the inside of rim being connected by elastic means to the frame at positions spaced at least 15 cm apart. At each position there may be provided a projection 1 on the frame covered by a layer (3), Fig. 3 (not shown) of soft elastic material. If the elastic material is sufficiently thick, the projections may be dispensed with. In a modification, Fig. 4, (not shown) wedge-shaped pieces of elastic material are inserted in bevelled recesses in the frame.
Patent GB-808871-A (GB)
Title: Improvements relating to piston sealing means
IPC: F16J9/20
Filed: 1957-02-18
Abstract: 808,871. Piston packing. GOETZEWERKE F. GOETZE A.G. Feb. 18, 1957 [Feb. 20, 1956], No. 5449/57. Class 122 (1). Piston packing comprises an L-section piston ring having a thin axial flange 2 urged into sealing contact with the cylinder wall 1 by the sealed medium, e.g. combustion gases, and a radial flange having two or more annular parts 3, 4 engaging corresponding grooves in the piston 5. The axial flange 2 tapers towards its free end and is accommodated with clearance in a recess 7 in the piston. The ring may be of light metal, steel or synthetic material and may be used as an oil scraper ring, its axial flange then being directed towards the crankshaft.
Patent GB-666334-A (GB)
Title: Improvements in or relating to soap dishes
IPC: A47K5/03
Filed: 1949-02-28
Abstract: 666,334. Soap holders. TANNER, T. H., and VALBANIA, Ltd. Jan. 10, 1950. [Feb. 28, 1949] No. 5457/49. Class 131. A soap dish comprises a dished plate, formed with open sides between the upwardly curved ends which are formed with laterally extending shoulders engaging a pair of spaced wires or similar supports forming part of a sponge basket or other frame for supporting the dish. As shown, the upwardly curved ends C, D of dished, metal or plastic plates A are extended laterally at each side to form shoulders E which engage cross wires F of a sponge basket G. The soap dishes may be provided with drainage holes and the open sides B facilitate the removal of soap sludge when the dishes are detached from the frame for cleaning.
Patent GB-252460-A (GB)
Title: Improvements in methods for the production of amines including the substitution products thereof and nitriles
IPC: C07C209/02
Filed: 1925-02-27
Abstract: 252,460. Schmidt, K.. F. Feb. 27, 1925. Aromatic amines; nitriles.-Amines or their derivatives and nitriles are obtained by treating aromatic hydrocarbons or organic carbonyl compounds with hydrazoic acid in the presence of a mineral acid or acids. The aromatic hydrocarbons yield primary amines, aldehydes yield formyl derivatives of the amines or nitriles, while ketones vield substituted acid amides. The mineral acid used may be concentrated sulphuric acid or phosphoric acid. In the examples, aniline and p-xylidine are obtained from benzene and p-xylene; acetaldehyde yields acetonitrile, which can be extracted with ether, leaving methyl formamide in the acid layer; benzaldehyde yields benzonitrile and formanilide, the yield of the latter substance being increased if larger quantities of sulphuric acid are employed; acetone yields methylacetamide; benzophenone yields benzanilide; and cyclohexanone yields #-leucine lactam as the principal product with cyclopentamethylene tetrazole as a by-product.
Patent GB-649193-A (GB)
Title: Improvements in and relating to electric switching means
IPC: H01H1/04
Filed: 1948-02-24
Abstract: 649,193. Regulating-switches; switch contacts. BRITISH THOMSON-HOUSTON CO., Ltd. Feb. 24, 1948, No. 5480. Convention date, Feb. 24, 1947. Drawings to Specification. [Class 38 (v) ] The movable and fixed contacts of a tapchanging switch, e.g. that of Specification 502,393, are coated, respectively, with rhodium and gold, in order to prevent the formation of sulphides by the action of the transformer oil thereon.
Patent GB-453939-A (GB)
Title: Improvements in or relating to electrostatic condensers
IPC: H01G4/015
Filed: 1935-02-21
Abstract: 453,939. Condensers. BOSCH AKT.- GES., R., 4, Militõrstrasse, Stuttgart, Germany. Feb. 21, 1935, No. 5538. Convention date, March 15, 1934. [Class 38 (ii)] The electrodes of a condenser consist of metal coatings on dielectric sheets, the coatings being thinner than À001 millimetres, so that, on puncture of the dielectric the coatings will disappear from round the fault and thus be self-healing. With coatings so thin the energy required to effect this operation is comparatively small. The metal may be a noble metal or metal with low melting point such as cadmium or zinc and it may be applied to the paper &c. dielectric layer a, b in the Figure, directly as by the use of an adhesive or by deposition as by cathode atomization or metal vaporization or by dusting or spraying. The coatings c, d which are of opposite polarity extend from opposite sides and each set is conductively connected as by filling up the edges with metal as, for example, by spraying. Additional dielectric layers f, g may be inserted. For dielectric non-fibrous insulating material such as cellulose derivatives may be used or hardenable materials or polymerized vinyl compounds.
Patent GB-1243056-A (GB)
Title: Improvements in or relating to supply circuits for ion accelerators
Inventor: WOOD JAMES DAVID LONDON HEDLEY
IPC: H01J27/02
Filed: 1968-02-02
Abstract: 1,243,056. Automatic control systems for ion accelerators. NATIONAL RESEARCH DEVELOPMENT CORP. Jan. 20, 1969 [Feb. 2, 1968], No. 5556/68. Heading G3R. A supply circuit for an ion accelerator (in the described embodiment a neutron generator of the kind described in Specification 1, 088, 088) includes an automatic control system to vary the supply for the ion source in accordance with variations of the extractor electrode current in order to maintain the latter at a predetermined value. As shown, the supply for the extractor electrode 6 of the generator includes a resistor R E  which provides a signal representative of the current I E  dependent on the degree of interception between the ion beam and the electrode 6. This signal is compared with a reference signal from a source 11 in a conventional transistorized differential amplifier 12, whose output controls the firing angle of a thyristor control circuit 13 which in turn controls the radio frequency oscillator 14 feeding the RF coil 2 of the ion source 1. Thus variations of extractor current automatically vary the RF supply to maintain a desired value of interception current I E  set by adjustment of the resistor R E . Operation of the generator over a range of values of extractor potential is discussed, Fig.3 (not shown).
Patent GB-1100144-A (GB)
Title: Improvements in drum brakes for bicycles, autocycles, and the like
IPC: B62L3/00
Filed: 1966-02-09
Abstract: 1,100,144. Brake drum. L. DUSSARRAT. 9 Feb., 1966 [10 Feb., 1965], No. 5586/66. Heading F2E. [Also in Division B3] A composite brake drum comprises a rolled steel ring or band 1 provided with an axial gap and a light metal part 2 cast around the band and extending into the gap to form a bar 3 therein. Countersunk radial holes are provided in the band to form further attachments between the parts 1 and 2. The band is expanded on a core to open the gap before the casting operation.
Patent GB-658884-A (GB)
Title: Improvements in indirectly heated baking ovens
IPC: A21B1/14
Filed: 1949-03-01
Abstract: 658,884. Heating systems and apparatus. NAAMLOOZE VENNOOTSCHAP FABRIEK VAN VLOEISTOFOVENS UNICA. March 1, 1949, No. 5622. Convention date, March 9, 1948. [Class 64(ii)] [Also in Group XII] In a baking oven of the indirectly-heated type, the superposed chambers 3 are heated by nests of parallel horizontal circulation tubes 8 connected through ducts disposed in the side walls of the oven to a heated reservoir 2 containing a molten mixture of 53 per cent potassium nitrate, 40 per cent sodium nitrite and 7 per cent sodium nitrate which is circulated by a pump driven by a motor 17 and melted and heated by electric resistors 7. Gaseous or liquid fuel heating may be substituted for the electric heating and in a modification, Fig. 3, burning solid fuel, flues 20 lead off from the combustion chamber 19 through the reservoir to a smoke box 21 from whence heating tubes 22 disposed below the floor of the first oven chamber conduct combustion gases to a smoke stack 23. The molten heating medium has an extremely low vapour pressure at normal baking temperatures.
Patent GB-503047-A (GB)
Title: Improvements in the manufacture of balls for games
IPC: B29C71/00
Filed: 1938-02-25
Abstract: 503,047. Inflated balls. DUNLOP RUBBER CO., Ltd., and TWISS, D. F. Feb. 25, 1938, No. 5992. [Class 132 (ii)] Inflated balls for games such as tennis are treated to resist gaseous diffusion by injecting substances having a suitable chemical reaction with the inner surfaces. Sulphuric acid or chlorine or bromine may be inserted by a hypodermic needle through a suitable soft plug provided in the balls. One reagent - may be placed in the balls at manufacture, e.g. phosphoric acid and a solution of sodium hypochlorite or hypobromite mixed with sodium chloride or bromide introduced later. When the reagents are introduced the balls are agitated to wet the inside surface thoroughly.
Patent GB-825456-A (GB)
Title: Improvements in and relating to electric switches
Inventor: VEDDER KARL
IPC: H01H23/12
Filed: 1956-02-27
Abstract: 825,456. Snap-action switches; retractive switches. VEDDER G.m.b.H. GEB. Feb. 27, 1956, No. 6001/56. Class 38 (5). The switch has a contact rocker with an intermediate bearing, and an operating lever pivoted on an axis parallel to said bearing and having a presser member for actuating the rocker which co-operates with one or more fixed contacts each connected to an associated terminal by connectors lying in slots in the top of the switch base. In Figs. 1, 2 and 3, the rocker 3 is pivoted at 5 on a support connected to a terminal 4, and co-operates with change-over contacts 8, 9. The operating lever 12 is pivoted at 15 on bearing parts 14, on a bridge 11, which parts 14 extend into recesses 13 in the base 1, which also has slots receiving the connectors from contacts 5, 8, 9 to terminals 4, 8<SP>1</SP> ,  91. Two rockers may be arranged side-by-side on a common support for operation by a common or separate lever (Fig. 4, not shown). The lever may have a spring-urged presser member 16 co-operating with a hump on the rocker to give a snap-action, or may be double-ended and co-operate with a central recess in the rocker to give a central "off" position (Fig. 7, not shown). The lever may be operated by a chain through mechanism which allows the switch to be operated to its various positions by successive pulls of the chain (Fig. 8, not shown). The fixed contact may be at one end only of the rocker. The lever may have an auxiliary presser pin 16a, Fig. 10, for operating an auxiliary rocker 3a, the lever being swung bodily about a point 35 to operate said rocker 3a, the lever returning automatically when released. The rocker may be forked at each end to co-operate with two pairs of fixed contacts and may be mounted on a support which is curved transversely to allow the contacts to align themselves properly (Figs. 11, 12, not shown). Other forms of change-over switch are described (Figs. 13- 20, not shown).
Patent GB-563984-A (GB)
Title: Improvements connected with cloche clips
IPC: A01G13/04
Filed: 1943-04-15
Abstract: 563,984. Cloches. GOWLLAND, C. S. April 15, 1943, No. 6035. [Class 20 (i)] A clip for glass plates in a cloche comprises an outer longitudinally-slotted angular member 1 with outwardly turned edge-flanges 3 and an inner resilient angle-member 2 of larger angle than the outer member, also flanged at its edges and provided with a rotatable eye 5 which can be passed through the slot in the , outer member and rotated to cause gripping of the glass plates 7, 8 between the members.
Patent GB-475465-A (GB)
Title: Photographic camera with photo-electric exposure meter
IPC: G03B7/04
Filed: 1937-03-01
Abstract: 475,465. Photo electric exposure meters. COUYOUMDJIAN, A. O. March 1, 1937, No. 6040. Convention date, Feb. 28, 1936. [Class 40 (iii)] [Also in Group XX] In a photographic camera with photo-electric exposure meter with variable resistances coupled to the diaphragm and shutter speed adjustments, one of these resistances is connected in parallel with the measuring instrument. As shown, the diaphragm of the lens 1 is regulated by the lever 2 which also adjusts the variable resistance 3 decreasing with increasing aperture. The shutter speed knob 9 controls also the variable resistance 8, increasing with increasing exposure time, connected in parallel with the measuring instrument 12. The circuit also includes the fixed resistance 7 and the photocell 4.
Patent GB-1418201-A (GB)
Title: Wood working apparatus
IPC: B27B1/00
Filed: 1973-02-07
Abstract: 1418201 Sawing apparatus HURN BROS ENG Ltd 7 Feb 1974 [7 Feb 1973 (2)] 6085/73 and 6086/73 Heading B5L  Apparatus for cutting elongate timber workpieces to length includes a conveying device comprising two spaced apart drive rollers 11, 12 which are driven in synchronism through a succession of predetermined rotary amounts, at and least some of said amounts being different, idler pressure rollers 13, 14 arranged to press downwardly towards the conveying device at predetermined times and for predetermined durations. The conveying device is adapted to transport a workpiece resting thereon intermittently from an infeed side to an outfeed side thereof, and a cross-cut saw A, B is provided at each of the infeed and outfeed sides. As described the apparatus also includes lateral clamps 17, 18, vertical clamps 16, 19, feed rollers 20, 21 and a further cross-cut saw D adjustable towards and away from the saw A by a worm and gear mechanism 25. The saws A, B, D are all rotary discs carried on pivoted arms. An endless belt 201 runs in toothed engagement with the rollers 11, 12 over a metal platen 200. In one method of using the apparatus, see Fig. 4, a workpiece W 1  is fed and after stopping and clamping its leading end is trimmed by saw A, Fig. 4 (I). After release the workpiece is again advanced and simultaneously the saw D is moved to a position at a spacing from saw A which is the same as the length of a flaw F 1  in the workpiece. The workpiece is again clamped and saws A and D are operated to cut away the flaw, Fig. 4 (III). Further feed of the workpiece and simultaneous movement of saw D then occurs so that a further flaw F 2  can be removed by saws A and D, Fig. 4 (V) when the workpiece is reclamped. The trailing end of the workpiece is trimmed by saw B. The locations of the leading and trailing ends of the workpiece and the flaws are detected, e.g. by photo-electric devices S and/or mechanical trips T which send signals to a programmer which controls the operation of the apparatus. The saw D may be omitted and the apparatus is then used merely for length-cutting and endtrimming.
Patent GB-583368-A (GB)
Title: Improvements in locks and latches
IPC: E05B13/10
Filed: 1944-04-03
Abstract: 583,368. Door latches. ENGLISH NEEDLE & FISHING TACKLE CO., Ltd., and DINHAM, A. T. April 3, 1944, No. 6133. [Class 44] Means for preventing operation of a door latch by the usual handle spindle comprises a rose or boss secured to the face of the door 11 and surrounding the spindle, a toothed or notched member mounted on and rotating with the spindle, and one or more locking members mounted within the rose and movable into or out of engagement with the toothed member by turning an operating ring mounted on the rose. The rose-plate shown has a flat flange 12 secured to the door by screws 14 and an upstanding cylindrical portion 13. Locking pieces 17 are slidable radially in guide slots formed in the base of the rose, the inner ends of the locking pieces being formed as V-noses 19 adapted to be engaged with the toothed or notched periphery of a disc 22 mounted on and non-rotatable relatively to the handle spindle 21. A cylindrical member 25 rotatably secured in the cylindrical part 13 by a gapped spring ring 29 engaging registering grooves 27, 28 has cam slots 26 engaging pins 20 projecting from the locking pieces, so that rotation of member 25 by its knurled outer end 24 moves the pieces 17 radially. The latch bolt may thus be locked in either its shot or retracted position. The handle 31 secured to the spindle 21 in any suitable way, may bear against a washer 30, provided with gaps to give clearance for the pins 20.