baber/WOPTO huggingface dataset:
Patent GB-685051-A (GB)
Title: An improved automatic valve
IPC: F16K15/08
Filed: 1949-06-16
Abstract: 685,051. Valves. ARMSTRONG WHITWORTH & CO. (PNEUMATIC TOOLS), Ltd., and WINHAM, H. W. Sept. 15, 1950 [June 16, 1949], No. 16061/49. Class 135. A check valve for air compressors, &c. utilizes permanent magnetism for urging the valve closure member towards its seat. As shown in Figs. 1, 2, a valve body 1 of non- magnetic material, and to which is attached a valve guard 2 also of non-magnetic material. has a deep annular groove 7 in which are secured by screws three permanent magnets 9 whose upper faces are slightly below two concentric seat rings 1a, 1b with which the annular. magnetized, valve member 6 coacts. Ports 1c are formed between the magnets 9. In a modification, an annular magnet 10, Fig. 4, has polarised faces against which are clamped annular pole pieces 11, 12, which form the valve seat. In another modification, which also has an annular magnet, the separate pole pieces are dispensed with and the valve member seats at its inner edge directly on the magnet and at its outer edge on the body of the valve, which in this case is of magnetic material so that the outer part of the seat also becomes a pole piece.
Patent GB-1456076-A (GB)
Title: Process for the preparation of tertiary methylphosphine oxides
IPC: B01J31/00
Filed: 1974-04-11
Abstract: 1456076 Trimethylsiloxymethyl phosphine oxides HOECHST AG 11 April 1974 [4 April 1973 16 Nov 1973 (2)] 16078/74 Heading C3S [Also in Division C2] The compounds and are prepared from the corresponding hydroxymethyl compounds by reaction with bis-(trimethylsilyl)acetamide.
Patent GB-1177543-A (GB)
Title: Switchgear.
IPC: H02B11/26
Filed: 1967-04-07
Abstract: 1,177,543. Switchgear structures; highcurrent switches. S. & C. ELECTRIC CO. 7 April, 1967 [23 May, 1966], No. 16085/67. Heading H1N. A switchgear structure comprises a pair of fixed contacts 37, 38 mounted in a metallic housing and co-operating with a pair of moving contacts 55 mounted on a sliding carriage and interconnected by a fuse 71. At least one of the pairs of fixed and moving contacts is shunted by a circuit interrupter 100 which comprises a fixed contact 102, an intermediate contact 105 and a moving contact 126. When an insulating slab 57 is moved to open the contacts 37, 55, a spring 114 initially maintains the contacts 102, 105 in engagement and latch fingers 148 engaging a groove in a gas-evolving trailer 144, hold the contacts 105, 126 closed, a spring 130 being compressed. When the main contacts 37, 55 have opened, contact 126 is released for rapid separation from the contact 105 by the spring 130, any arcing being extinguished by gas evolved from the trailer 144 and the interior of the insulating tube 106 carrying the contact 105. Subsequently, the contact 105 is moved away from the fixed contact 102, as the slab 57 moves to the fully open position in which it closes an opening in a "safety" chamber 78. In this position, contacts 93 engage fixed earthing contacts (not shown) to earth the moving contact assemblies so that attention may be given to the fuse 71 or interrupter 100 on opening of a door 20. The opening of this door causes a latch 86 to latch the carriage including the slab 57 to prevent reclosure of the switch. A further arrangement (not shown) prevents opening of the door when the switch is closed. The movement of the carriage is effected with a snap action by linkage including an over-centre compression spring, a lost motion connection and a chain drive (not shown) .
Patent GB-868798-A (GB)
Title: Improvements in photographic sensitizing dyes
IPC: C09B23/01
Filed: 1957-05-21
Abstract: Compounds of the general formula III:  <FORM:0868798/IV (b)/1> wherein R1 is a cyano or carbalkoxy group, R3 is hydrogen or a carbalkoxy group of 2 or 3 carbon atoms, and R4 and R5 are hydrogens or alkyl groups of 1 to 4 carbon atoms, are prepared by condensing a 3-methyl-2-cyclohexen-1-one with a compound of the formula CN-CH2-R1. Examples are given of the reaction of isophorone with malonitrile or ethyl cyanoacetate, and of the reaction of malonitrile with 3-methyl-2-cyclohexen-1-one itself or having a 4-carbethoxy or 5-methyl substituent.  1-Phenyl-2-thiopyrrolidone is prepared by refluxing 1-phenyl-2-pyrrolidone with phosphorus pentasulphide in pyridine. The product is quaternized by fusing with methyl-p-toluene sulphonate to give 2-methylmercapto1- phenylpyrrolidiniumptoluenesulphon ate.  Specifications 344,409, 776,050 and 868,798 are referred to.ALSO:Methine dyes of the general formula:- <FORM:0868798/IV(c)/1> wherein R is an alkyl, substituted alkyl or aryl group, R1 is a cyano or carbalkoxy group, R3 is hydrogen or a carbalkoxy group of 2 or 3 carbon atoms, R4 and R5 are hydrogens or alkyl groups of 1 to 4 carbon atoms, n and d are 1 or 2 and Z completes a 5- or 6-membered heterocyclic nucleus, are prepared by reacting a quaternary cyclammonium salt having a reactive alkylmercapto, arylmercapto or 2-acylanilidovinyl group with a compound of the formula:-  <FORM:0868798/IV(c)/2> Examples are given of dyes of formula I wherein R3 is hydrogen or carbethoxy, R4 and R5 are hydrogen or methyl groups and Z completes a benzthiazole, benzoxazole, benzselenazole, naphthathiazole, quinoline, benzimidazole, pyrrolidine, thiazolidine or acenaphtho [1 : 2]-thiazoline nucleus.  Reference also is made to a benzimidazole nucleus containing a 5-acetyl or 5-ethylcarbamyl substituent. Specifications 344,409, 776,050 and 868,797 are referred to.
Patent GB-534456-A (GB)
Title: Production of liquid saturated hydrocarbons
IPC: C07C2/60
Filed: 1939-06-02
Abstract: 534,456. Hydrocarbons. STANDARD OIL DEVELOPMENT CO. 2 June, 1939, No. 16231. Convention date, Nov. 19, 1938. Drawings to Specification. [Class 2 (iii)] Fuel hydrocarbon mixtures are prepared by reacting isoparaffins with olefines having not more than five carbon atoms or low molecular weight polymers thereof in the presence of a complex catalyst consisting of aluminium halide and the halide of another metal and having the molar ratio of the aluminium halide to the other halide greater than 1:1, and preferably from 1.1 to 2.5:1. The isoparaffin is present in more than equimolecular ration with regard to the olefine, preferably between 2 and 12 mols. of isoparaffin per mol. of mono-olefine Isoparaffins specified are isobutane and isopentane, whilst ethylene, propylene, normal and isobutylenes and normal and branched amylenes are referred to as olefines, together with polymers and copolymers thereof of low molecular weight; mixtures of hydrocarbons containing isoparaffins and olefines may also be used, e.g. partially dehydrogenated field butanes, and mixtures from catalytic and thermal cracking units. Catalysts mentioned are derived from aluminium chloride and sodium lithium or potassium chloride, and from aluminium bromide and antimony, sodium or mercury bromide ; a complex of aluminium chloride and sodium chloride containing 1.1 to 2.0 mols. of aluminium chloride to 1 mol. of sodium chloride is particularly effective. These catalysts are prepared by mixing the other metal halide with slightly more aluminium halide than is necessary for the required proportions, heating the mixture in an open vessel until fusion takes place, and filtering through a wire gauze. The catalysts may be mounted upon carriers either inert or activated with mineral acids or acid gases; carriers mentioned include silica gel, bauxite, kieselguhr and the substance known under the Registered Trade Mark " Celite "; regeneration of the catalysts may be effected by treatment with hydrogen halides or free halogens, or by heat and pressure alone. The temperature ranges from 300‹ to 500‹F. and the pressure from 1,000 to 3,000 lbs. per sq. in. The reactants are maintained in contact with the catalyst for a moderately prolonged period, of the order of 7 to 45 minutes. Fractions of undesired hydrocarbons produced may be returned to the process. A suitable apparatus is described and a table is given listing the data associated with a number of experiments. Specification 520,159 is referred to. The Specification as open to inspection under Sect. 91 also refers to complexes of potassium bromide with ferri chloride or bromide as catalysts and includes an example according to which a small percentage of tert-butyl chloride is introduced into the reaction mixture. This subject-matter does not appear in the Specification as accepted.
Patent GB-813644-A (GB)
Title: Improvements in or relating to steam boiler apparatus and means for regulating the delivery pressure of boiler feed pumps
IPC: F22D5/20
Filed: 1956-05-25
Abstract: 813,644. Feedwater regulators. SCHELLENS, C. A. May 25, 1956 [June 15, 1955], No. 16296/56. Class 123(2) In a feedwater supply system for a steam boiler 10, a feed pump 20 driven by a turbine 21 withdraws water from a tank 16 and delivers it to the boiler drum 12 through a pipe 23 in which is fitted a check valve 24 and a regulating valve 25, the latter being operated manually or automatically to maintain a constant water level in the drum throughout the load range of the boiler. To make the throttling action of the valve 25 more effective by preventing the rise or fall of pressure in the pipe 23 which would occur as the throttle is closed or opened and which tends to offset the throttling action, a constant pressure difference is maintained across the valve by automatic variation of the pump speed, a regulating valve 28 being connected in the steam pipe line to the turbine 21 and being actuated by a device responsive to variations in said pressure difference from the preset value. The device comprises a cylindrical housing 50 containing a piston chamber in which a piston 48 is slidably mounted. The piston rod 44 which projects from the top of the housing, and which is pressed downwardly 'by an adjustable spring 52, is connected by a lever 40 to the stem 34 of the valves 30, 32 of the regulating valve 28. Pipe lines 60, 70 respectively connect the chambers 56, 58 above and below the piston 48 with the steam drum 12 and feed pump discharge line 23 so that when the required pressure difference exists across the valve 25, the piston is balanced, the boiler pressure and spring pressure thereabove equalling the feedwater pressure therebelow. If the pressure difference changes, the consequent piston movement actuates the valve 28 to change the pump speed so that the pressure difference is restored. To prevent overheating of the housing 50 by steam or hot water from line 60 with consequent deposition of scale therein, provision is made for a trickle of feed-water to flow continuously in the line 60 towards the boiler, leakage of water occurring past the piston into chamber 56 and also from a chamber 86 disposed above the chamber 56 and communicating with the inlet pipe 70 through a duct 88. In modifications, provision for the slow leakage into the pipe 60 is made by drilling a small hole in the piston or, where the latter is replaced by a diaphragm, by providing a by-pass pipe having an orifice plate therein.
Patent GB-196207-A (GB)
Title: Spring mattress wire repair patch and protector
IPC: A47C23/28
Filed: 1922-06-13
Abstract: 196,207. Wolstenholme, S. June 13, 1922. Mattresses.-A shield for protecting a wire mattress against damage by the tensioning-screw 6 comprises two plates 1, 2 placed on the upper and lower surfaces of the mattress and secured in position by bolts 4. The plates may be made of metal, or if made of a softer material, such as vulcanized fibre, a metal facing plate 3 may be provided.
Patent GB-646382-A (GB)
Title: Carrier current message transmission systems
IPC: H04J1/10
Filed: 1947-06-20
Abstract: 646,382. Multiplex systems. STANDARD TELEPHONES & CABLES, Ltd. June 20, 1947, No. 16345. Convention date, June 25, 1946. [Class 40 (iv)] In a carrier transmission system in which two separate lines each include a number of telephone channels, frequency bands of identical width in the two lines and containing some of the channels are interchanged without segregating any of the individual channels, each band being first selected by coarse filters and then injected into the cleared space in the other line after frequency changing to the optimum frequency range of steep cut-off filters and subsequent demodulation. The coarse filters have attenuation-frequency characteristics as shown in Figs. 4a and 4b, each rejection or transmission band f3-f4 being flanked by intermediate zones of frequencies f2-f3, f4- f5 in which the attenuation varies with frequency. The transmission lines L1 and L2 each transmit a number of telephone channels simultaneously. Line L1 is connected through amplifiers 7 and 8 to a band-stop filter 9 and a band-pass filter 10 which select the frequency band to be transposed. The intermediate zones of filter 10 are separated by band-pass filters 11, 13 and applied to steep cut-off filters 17, 19 after frequency changing to a common frequency band by modulators 14, 16. The frequencies in each intermediate zone are subsequently re-converted to their initial values by demodulators 20, 22 and applied to the outgoing line through amplifiers 26, 28. A phase-retarding network 29 and attenuation correcting networks 23, 25 ensure that the intermediate zones of frequencies are superimposed on similar zones from filter 9 in the correct phase and amplitude relationship. A similar modulation and demodulation network interconnected by lines X, Y and an identical equipment (not shown) associated with the line L2 selects and interchanges the transmission frequency bands. In a modification, Fig. 3, all the signal channels are applied through amplifiers 31, 33 and a phase retarding network 32 in opposition to signal channels from an amplifier 34 which have the selected frequency band excluded by a band stop filter 30. The resulting selected frequency band and its intermediate frequency zones are then separated by filters 11, 12, 13 as previously described. The through channels to the retarding network 29 are applied through an amplifier 38. The incoming line may be connected through a band-bass filter 37 to a terminating impedance RO or, alternatively, it may be correctly terminated by omitting the amplifier 33 and filter 37 and inserting an amplifier in front of filter 30.
Patent GB-761979-A (GB)
Title: An hydraulic copying device for lathes
Inventor: LAN ARMAND MARCEL LE
IPC: B23Q35/18
Filed: 1953-06-15
Abstract: 761,979. Copying-lathes. BATIGNOLLESCHATILLON SOC. ANON. June 15, 1953, No. 16411/53. Class 83 (3). An hydraulic copying-device for use with slide-lathes comprises in combination a unit for attachment to the transverse-slide, and a template adjustably mounted, either on the lathebed for movement with the transverse-slide, or on the carriage for movement with the latter, the unit comprising a tool-holder and toolholder-carriage, an hydraulic piston, cylinder, and fluid-reservoir, a pump, and conduits including a copying-valve and a feeler to cooperate with the template and operate said copying-valve. The unit comprises a base 8, angularly-adjustable about a pivot 9 on the normal transverse-slide 3, and carrying a slide 17 with a tool-holder 18. The slide 17 is moved by hydraulic-pressure applied to a piston 12 carried by a block 14 secured to the slide. Pressure is controlled by a valve 24 in the block, operated by a pivoted-feeler 23, the lower spring- pressed end of which bears against a template 27. The latter is held between centres on adjustable brackets supported by a table 45. This table is adjustable transversely on ways on a bracket 43 secured to the rear of the lathe-bed. A longitudinal guide-rail 57 on the table is engaged by three rollers 56, 56a, 56b (Fig. 3, not shown) supported by a bracket 55 depending from the transverse-slide 3. Thus, when the latter is adjusted by the handle 5 to vary the cut, the template and follower-mechanism is moved together without affecting the valve 24. The template may be mounted on the longitudinalcarriage for copy-facing operations.
Patent GB-1507704-A (GB)
Title: Photopolymerisable compositions
IPC: G03F7/26
Filed: 1975-04-21
Abstract: 1507704 Photopolymerizable compositions E I DU PONT DE NEMOURS & CO 21 April 1975 [23 April 1974] 16412/75 Heading C3V [Also in Division G2] Photopolymerizable compositions which, after exposure, are developable with aqueous alkaline solutions comprise (i) 7-5-35% of a polymerizable non-gaseous ethylenically unsaturated compound, (ii) 0À1-10% of a photoinitiator and (iii) 52-92À4% of a mixture of binders comprising (A) 15-60% of an acidic film-forming polymer which is adherent to copper and is soluble in aqueous alkaline solution but insoluble in water, (B) 60-15% of an acidic polymer which is insoluble both in water and aqueous alkaline solution and optionally (C) another polymeric binder component, e.g. polymethyl methacrylate, all percentages being based on the total weight of solvent-free composition. Binder component (A) may be a vinyl acetate or acrylic copolymer, or a cellulose derivative and component (B) may be a toluene sulphonamide-formaldehyde resin, or a methyl methacrylate, vinyl chloride, vinyl acetate or styrene copolymer.
Patent GB-967002-A (GB)
Title: Improvements in or relating to semiconductor devices
Inventor: ADAM FRITZ GUNTER
IPC: H01L23/29
Filed: 1961-05-05
Abstract: 967,002. Semi-conductor devices. STANDARD TELEPHONES & CABLES Ltd. May 5, 1961, No. 16416/61. Heading H1K. After treating a semi-conductor body so that one area of its surface has an oxide coating and a second has not part of the second area and an adjacent part of the first area is etched away and a film of electrically conducting material deposited on the surface in such a way that the oxide coating masks part of the etched area from deposition. In making a transistor an oxide coated NPN arrangement is produced by diffusing first gallium and then phosphorus into the surface of an N type silicon body and subsequently heating it in wet oxygen. The resulting oxide coating is selectively removed by applying a photo-resist, exposing selected areas thereof to ultra-violet radiation, removing the unexposed photo-resist material and etching away exposed parts of the oxide layer in hydrofluoric acid. The body is next etched in a mix of hydrofluoric, nitric and acetic acids to the form shown in Fig. 1c in which only the masked part 2 of the N layer remains. After diffusing gallium into the exposed areas, gold-gallium alloy is vacuum evaporated to form layer 11 (Fig. 10). After etching to remove layer 11 and the oxide layer from N layer 2, aluminium is vacuum evaporated over the entire surface and then removed except from the centre of zone 2 by masking and etching as above. Finally, the device is heated to alloy the aluminium and gold-gallium to the N and P layers 2, 3 respectively. In an alternative method, after etching to the form shown in Fig. 1c, the centre of oxide layer 2 is removed and aluminium vapour deposited over the entire surface and heated to form contacts 14, 15 to the N and P layers (Fig. 2). Both methods are applicable to the production of a plurality of transistors on a single body which is later subdivided.
Patent GB-582684-A (GB)
Title: Rectilinear machine belt fastener
IPC: F16G7/00
Filed: 1944-08-30
Abstract: 582,684. Machinery belt fasteners. LOEWENTHAL, W. Aug. 30, 1944, No. 16493. [Class 80 (i)] The two ends of a machine belt, having upper surfaces 7 and lower surfaces 8, are joined by two bridge pieces 1, 3 having serrations 2, 4 on their. inner surfaces. The bridge pieces are urged together to grip the belt by a bolt 5 passing ihrough between the ends of the belt, thereby making it unnecessary to perforate the belt.
Patent GB-1423598-A (GB)
Title: Treatment of soil and other material
IPC: A01G11/00
Filed: 1973-04-06
Abstract: 1423598 Sterilising soil P J WARING 4 July 1974 [6 April 1973] 16604/73 Headings A5E and A5G [Also in Division B1] A method of sterilising or fumigating soil or material lying on the surface thereof comprises treating the soil or material with sterilising or fumigating agent beneath a layer of foam which is applied independently of the agent which covers the surface of the soil or material and which is sufficiently impervious to the agent to substantially retain the agent beneath the foam and in contact with the soil or material. It is preferred to inject the sterilising or fumigating agent beneath the layer of foam, suitable agents being methyl bromide, ethylene dibromide, phosphine, ethylene oxide or a mixture of dichloropropane and dichloropropene. Suitable foams can be generated using a detergent type foaming agent together with an additive, e.g. carboxy methyl cellulose or gelatin, in water.
Patent GB-594225-A (GB)
Title: Improvements in type cleaning devices
IPC: B41J29/17
Filed: 1945-06-29
Abstract: 594,225. Cleaning type. WATT, J., and TRITT, K. June 29, 1945, No. 16636. [Classes 100 (ii) and 100 (iv)] A device for cleaning the type of typewriters, tabulating-machines, formes, rubber or like stamps, or braille-type embossing-machines comprises a composite sheet consisting of a backing sheet 5, Fig. 1, made of material such as bendable kraft paper, card paper, linen, thin metal or a laminated sheet, a thin layer of tacky material 6 applied to the backing sheet, and a protective sheet 7 of cellulose film, opaque polished paper, or metal foil applied to the tacky layer, the sheets 5 and 7 having coincident perforations 9 whereby a section of the sheet 7 may be torn off prior to application of the corresponding section of the tacky layer to the type, and whereby the corresponding section of the backing sheet may be removed when the tacky layer is used up. The composite material may be used by passing it through a typewriter, or it may be wound spirally or in concentric layers on a roller 10, Fig. 4, adapted to be rolled over flat formes, stamps or braille plates in which case the sections of the backing sheet, guard sheet or both are separated by cross strings or fine wire, or the material may be in the form of a strip folded zig-zag. The tacky layer is preferably of a light colour and may be perforated, indented or severed along the lines corresponding to 9. For use in a typewriter, the outer surfaces of the sheets 5 and 7 may have a rough finish to ensure feeding through the machine. The tacky material may be applied in sheet form, or a rectangular tablet may be placed on the backing and rolled out to the required area, or applied so as to leave a margin of backing material ; for use in a typewriter, a greater margin may be left at the bottom of the sheet. The protective sheet may also extend beyond the tacky material.
Patent GB-518809-A (GB)
Title: Improvements in or relating to vehicle wheels provided with demountable rims
IPC: B60B25/02
Filed: 1939-06-06
Abstract: 518,809. Vehicle wheels. AKT.-GES. DER EISEN UND STAHLWERKE VORM. G. FISCHER. June 6, 1939, No. 16639. Convention date, June 14, 1938. Addition to 432,707. [Class 144 (ii)] Rim segments of the kind described in the parent Specification are fitted with hard metal plates 7 to form the abutments at the side remote from the wheel-seating portion 3 of the rim.