baber/WOPTO huggingface dataset:
Patent GB-1330923-A (GB)
Title: Magnetic tape recording systems
IPC: G11B27/34
Filed: 1971-06-29
Abstract: 1330923 Automatic control of speed BURROUGHS CORP 29 June 1971 [9 July 1970 11 June 1971] 30361/71 Heading G3R [Also in Divisions G4 G6 and H2] In order that a tape 10, Fig.1, shall be driven at a constant speed past a read/write head 16, a signal which decreases non-linearly with the amount of tape wound on the reel, in such a way that it represents the desired motor speed is produced - in a first embodiment by means of a photo-cell 32 and lamp 30, a counter 34, a digital-to-analogue converter 36 and circuits 38 and 40, and in a second embodiment by an appropriately positioned photo-electric strip which is progressively screened from a lamp by the tape as it is wound onto the take up spool - and is applied to a servo unit 42 in which it is compared with a back e.m.f. signal representing the actual motor speed in order to produce a signal which controls the motor via transistors.
Patent GB-1387424-A (GB)
Title: Measuring instruments
IPC: G01N21/53
Filed: 1971-06-29
Abstract: 1387424 Photo-electric apparatus PLESSEY CO Ltd 15 June 1972 [29 June 1971]  30372/71 Heading G1A In apparatus for measuring the absorption or scattering of light e.g. in a liquid, which utilizes a beam splitter 12 to form two beams, to pass through the liquid one 15, which is directed straight at a first detector 10 and a second 14 which is directed to a location displaced from the position of a second detector 9, the second beam is arranged to be of higher intensity than the first so that the detectors receive substantially equal illuminations and can thus be of similar sensitivities The apparatus shown, for measuring scattering by suspended solids in water flowing through mutually isolated chambers 3,4, includes direct path 15 and path 14 in which scattering will produce increased illumination of detector 9 as compared with a non-scattering condition. The beam splitter is a semi-reflective mirror 12 arranged to direct more light into path 14 than into 15. In order to compensate for fouling of mirrors and photo-cells a further beam splitter and source are mounted on the top of the chambers, Fig.2(not shown), the direct and indirect paths being to different ones of the detectors from the first source/beam splitter arrangement the sources being switched on alternately. Alternatively, a single source beam splitter is rotated to align alternately the direct beam with each detector. The apparatus is modified for absorption measurements by providing different path lengths to the two detectors.
Patent GB-415612-A (GB)
Title: Improvements in or relating to radio receivers and like apparatus
IPC: H03G3/22
Filed: 1933-11-01
Abstract: 415,612. Valve circuits for wireless reception. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London.-(Assignees of Burnside, D. G. ; 232, W. Gorgas Lane, Philadelphia, U.S.A.) Nov. 1, 1933, No. 30388. Convention date, Nov. 25, 1932. [Class 40 (v).] The triode portion of a diode-triode valve 1 is used as a high frequency amplifier, the signals from the source M1 being applied to the grid 4, and the output from the anode 5 is fed through a condenser C<1>1 to the parallel connected diode anodes D1, D2 for rectification. The D.C. component of the rectified output in the load resistance R<1>1 produces automatic volume control potentials, and the A.C. component is amplified by means not shown. Specification 410,619 is referred to.
Patent GB-443981-A (GB)
Title: Improvements in gramophone pick-ups
IPC: G11B7/00
Filed: 1934-10-23
Abstract: 443,981. Gramophone pick - ups; photo-electric cells. JOHNSON, R. G., 21, South Oswold Road, Edinburgh.-(Johnson, E. N. ; 24, Westminster Court, Highlands Road, Yeoville, Johannesburg, South Africa) Oct. 23, 1934, No. 30391. [Class 40 (iv)] [See also Group XL] A mirror 20 is mounted on the spindle of the stylus - carrier which oscillates about the axis 18. A beam of light from a lamp 21, is divided by a mirror 29, 30, into two parts 24a, 24<b>, which pass to the cathodes 32, 33 of two photo-electric cells through slits 26 in the casings 34, only one casing being shown. The electrical outputs of the cells are amplified and combined by the push-pull amplifier 28 and transmitted to the loud-speaker 27. The lamp, the mirrors and the cells are mounted on the tone arm 3.
Patent GB-1147005-A (GB)
Title: Improvements relating to wheeled hand-trolleys
Inventor: DEAVIN ERNEST ARTHUR HACON
IPC: B62B1/00
Filed: 1967-07-01
Abstract: 1,147,005. Hand trucks. DEAVIN-IRVINE PRODUCTS Ltd. 8 Jan., 1968 [1 July, 1967], No. 30464/67. Heading B7B. A hand truck has a main frame 12 which carries at one end a shaft 15 on which an auxiliary frame 11 is pivoted, the frame 11 being provided with wheels 31 and upturned ends 16 which abut the main frame. The main frame 12 carries a tube 23 into which either the part 44 of an auxiliary wheeled unit 40, or the shaft 34 of the handle 33 may be engaged thus allowing the trolley to be used as shown or as a conventional toe plate truck.
Patent GB-1509582-A (GB)
Title: Electrochemical gas detectors
IPC: G01N27/49
Filed: 1975-07-22
Abstract: 1509582 Electro-chemical gas detector BAYER AG 22 July 1975 [27 July 1974] 30598/75 Heading G1N A gas detector comprises two electrodes in contact with an electrolyte comprising an anhydrous organic gel. The gas is guided past one of the electrodes. The gel is preferably formed by the actions of an anhydrous organic solvent on a synthetic polymer. The polymer is preferably linear with a molecular weight of at least 50,000, is a homopolar molecule and is preferably a homopolymer or copolymer of definically unsaturated compounds, particularly vinyl or vinylidene compounds. Preferred polymers are PVC, polyacrylorictrile and polymethylmethacrylate. The gel preferably has an electrical conductivity of at least 10<SP>-5</SP> mho/cm, a dielectric constant of at least 20 and a dipole moment of at least 2À0 Debye. It may contain a salt which dissociates in the organic solvent for the polymer, the salt being provided to catalyze electrode reactions, provide reactive ions in the electrolyte, alter electrode potentials and inhibit reaction with other gases. The organic solvent preferably contains a carbonyl, alkoxyl, hydroxyl or phosphoric acid ester group. Preferred solvents and specific compositions for detecting specified gases are quoted. A preferred sensor construction comprises a polyethylene member I to which is attached a polyethylene ring 2 which contains the gel 3 between electrodes 5 and 6. The member I may fit into a throughflow cell which passes gas to and across the face of electrode 5. The measuring cell may be biased by a polarizing voltage, the current flow caused by the detected gas being measured.
Patent GB-896801-A (GB)
Title: Improvements in sealed electric storage batteries
Inventor: DUDDY JOSEPH CHARLES
IPC: H01M50/103
Filed: 1958-09-25
Abstract: 896,801. Batteries. ELECTRIC STORAGE BATTERY CO. Sept. 25, 1958, No. 30639/58. Class 53. An alkaline accumulator comprises electrodes 11b, 12b with separators 13b, and conductive plates 14a between the cells, the whole being enclosed in a container 21 which is cast in situ to exclude air and form a gas and liquid-tight enclosure. The elements may be impregnated with electrolyte, for example caustic potash, before the container is formed or it may be introduced through holes made in the container and which are subsequently plugged. The electrodes may consist of sintered zinc oxide and silver powder sintered on to silver plates which may form the plates 14a which connect the cells in series. Mercury for amalgamation may be applied to the surfaces of the plates 14a. Each separator consists of two or more members, three being shown in Fig. 1. The centre member consists of a porous carrier having an ionexchange resin in its pores. The carrier may consist of asbestos, polyethylene or polyvinyl chloride. On each side of the central member is a porous compressible sheet, e.g. polyethylene. The container is cast round the elements of the battery while they are under compression, and is made of a resin that shrinks on polymerization, for example an epoxy polyamide resin, polyethylene, polystyrene or polyvinyl chloride. Specifications 709,146 and 896,800 are referred to.
Patent GB-254967-A (GB)
Title: Improvements in tubes of feed water heaters for steam boilers
IPC: F22D1/02
Filed: 1926-03-10
Abstract: 254,967. Coodbrand, P. W. March 10, 1926. Jointing tubes to flat headers.-In an economizer wherein the headers A, B are connected bv tubes C having tapered ends c, the headers and tubes are secured together by .casting a collar D at the ends of some or all of the tubes to form a shoulder against which a locking plate E, formed in two parts E', E<2>, bears. The two parts of the locking plate E overlap one another, so that two of the screws affixing the locking plate to the header also affix the two parts E', E<2> of the locking plate together.
Patent GB-1434951-A (GB)
Title: Lubricating system for a conveyor chain or the like
IPC: F16N7/38
Filed: 1973-06-27
Abstract: 1434951 Lubricating conveyer chains C F A LEBON 27 June 1973 30718/73 Heading B8A [Also in Division F2] A lubricating system for a conveyer chain 1 comprises one or more lubricant ejectors 11, for intermittently dispensing predetermined amounts of lubricant to a point to be lubricated and means 5, for controlling the now of lubricant to the ejector 11, the ejector 11 including ejection means 12 in the form of a needle-like body 31 having at least two capillary channels 32, 33 each leading separately to an outlet end which has a single chamfer. The embodiment shows the chain 1 lubricated by five ejectors 11a-11e supplied by a reservoir and intensifier 5 connected to an air-line 6 and controlled by a timing switch 2 connected to a solenoid operated valve 4.
Patent GB-1337805-A (GB)
Title: Packaging machine
IPC: B65B51/30
Filed: 1971-06-30
Abstract: 1337805 Packaging SOBREFINA SA 30 June 1971 [3 July 1970] 30720/71 Heading B8C In a vertical form and fill packaging machine, the lower end seal 26 of a tube 1 is gripped and supported by jaws 12, 13 while an increment of pourable material is added. The jaws 12, 13 are mounted on cutting blades 11 so that as a completed package is cut from the tube, the leading end seal 26 of the next package to be formed is gripped. The blades 11 then remain closed until that package is filled. The top of the filled package is sealed by jaws 2 which, through a lever 20, raise the gripping jaws 12, 13, to give added support to the package during filling and to promote folding of the package wall at positions 30. The pourable material is fed to the top of the tube 1, and flow of material to the bottom of the tube is prevented, during sealing, by pinching the tube between a fixed roller 5 and a movable roller 6. After sealing, the blades 11 are separated and the completed package 25 is lowered, the rollers 5 and 6 remaining closed until the completed package has been cut off and the lower end of the tube has been gripped by the jaws 12, 13. The completed package is moved on a support 23 to a shaping apparatus where it is given a parallelepipedal shape. The tube 1 is of elongated cross-section and is formed from a web of paper having a thermoplastics coating on one side.
Patent GB-1500302-A (GB)
Title: Braking force regulation in unsprung single-axle trailers
IPC: B60T8/18
Filed: 1975-07-23
Abstract: 1500302 Load responsive breaking system KOMBINAT FORTSCHRITT LANDMASCHINEN NEUSTADT IN SACHSEN VEB 23 July 1975 [24 July 1974] 30743/75 Heading F2F A braking force regulator for an unsprung single-axle trailer comprises a brake force limiter 16, means to automatically adjust the device 16 in dependence on loading of the trailer and means including an inertia body displaceable in dependence on decleration of the trailer to also adjust the device 16. The inertia body may be a pendulum 13 or a sliding weight (19, Fig. 3, not shown) connected to a lever arrangement for adjusting the device 16. A traction eye 3 is connected to a bifurcated lever 4 and journalled on a horizontal bolt 2 at the forward end of the trailer draw bar 1, the rearward ends of lever 4 being fastened by tension springs 5 to the bar 1.
Patent GB-679565-A (GB)
Title: Improvements in or relating to two-speed gearing
IPC: F16H3/66
Filed: 1949-11-30
Abstract: 679,565. Change-speed gear. CLEFF, P. H., and PARSONS & MARINE ENGINEERING TURBINE RESEARCH & DEVELOPMENT ASSOCIATION. Nov. 27, 1950 [Nov. 30, 1949], No. 30762/49. Class 80 (ii). Two speeds are provided between an input sun S' of a first planetary train and an output ring a<SP>2</SP> of a second, by braking respectively, at B' the common planet-carrier c<SP>1</SP>, c<SP>2</SP>, and at B' the interconnected first ring a<SP>1</SP> and second sun S'.
Patent GB-1188119-A (GB)
Title: Improvements in and relating to Diazotype Processes
IPC: G03C1/54
Filed: 1967-07-04
Abstract: 1,188,119. Photographic processes. KALLE A.G. July 4, 1967 [July 6, 1966], No. 30767/67. Heading G2C. Diazotype copies are produced by imagewise exposing a diazotype material and developing with a solution containing as coupler 2, 3-dihydroxynaphthalene or a 2-hydroxy-3-napthamide; the diazonium compound being those disclosed in the material of co-pending Specification 1,189, 537 and of formula wherein R 1  is hydrogen and R 2  is acyl, sulphonyl, carboxyethyl or carbamyl or of formula where R 6  is a residue completing a 6-membered heterocyclic ring or R 1  and R 2  together form R 7  - C=O in which R 7  completes a 5-membered heterocyclic ring with the nitrogen and carbon atom, R 3  is alkyl, R 4  is alkyl or aralkyl or R 3  and R 4  together complete a 6-membered heterocyclic ring, R 5  is hydrogen, halogen, alkyl or alkyl- or arylmercapto and X is an anion. The diazotype material may be sensitized on both sides using a support containing an ultraviolet light absorber so that two images may be obtained on development.
Patent GB-533768-A (GB)
Title: Improvements in or relating to thermoplastic printing inks
IPC: C09D11/02
Filed: 1939-11-24
Abstract: 533,768. Cellulose ether printing inks. INTERCHEMICAL CORPORATION, and STEVENS, A. H. Nov. 24, 1939, No. 30768. Convention date, Dec. 8, 1938. Addition to 515,462, [Group XV] Class 2 (ii) [Also in Groups XV and XVI] A thermoplastic printing ink according to the parent Specification has a vehicle which comprises a solvent wax or wax-like substance such as a resin-free animal, vegetable, or mineral wax or a synthetic waxy material or hydrogenated oil, e.g. fully hydrogenated castor oil, and 1 per cent to 10 per cent of an alkyl cellulose, such as ethyl cellulose. Pigment may be dispersed in an oil acting as a plasticizer for the cellulose alkyl ether.
Patent GB-885850-A (GB)
Title: Pregnatetraenes and method of preparation
IPC: C07J5/00
Filed: 1958-09-26
Abstract: The invention comprises compounds of the general formula <FORM:0885850/IV (b)/1> wherein R represents an alkanoyl radical containing up to 6 carbon atoms or hydrogen, and a process for the preparation of compounds of the general formula <FORM:0885850/IV (b)/2> p  wherein X-Y represents one of the following groups <FORM:0885850/IV (b)/3> and R and R1 represent alkanoyl radicals containing up to 6 carbon atoms, and R1 may also represent hydrogen by (a) dehydrogenating with a mild oxidising agent such as selenium dioxide a compound of the general formula <FORM:0885850/IV (b)/4> wherein R represents hydrogen or an alkanoyl radical containing up to 6 carbon atoms, to form a compound of the second general formula above in which X-Y represents <FORM:0885850/IV (b)/5> and, if desired, when R represents an alkanoyl radical, hydrolysing to convert R to hydrogen; (b) treating the compounds formed in step (a) with osmium tetroxide to form a compound of the second general formula above wherein X-Y represents <FORM:0885850/IV (b)/6> and, if desired, when R represents an alkanoyl radical hydrolysing to convert R to hydrogen; and (c) treating the compounds formed in step (b) with the required acylating agent, preferably in the presence of a base, to form a compound of the second general formula above wherein X-Y represents <FORM:0885850/IV (b)/7> Detailed examples are given.  3,20 - Diketo - 9a  - fluoro - 11a ,16a ,17a ,21 - tetrahydroxy - D 1,4 - pregnadiene - 16,21 - di - alkanoates compounds are prepared by treating 16a ,17a ,21 - trihydroxy - 1,4,9(11) - pregnatriene - 3,20-diones 16,21-dialkanoates with N-bromoacetamide to form the corresponding 9a -bromo-11b  - hydroxy - D 1,4 - pregnadienes, treating these compounds with potassium acetate to form the corresponding 9,11-epoxy compounds, and treating the epoxy compounds with hydrogen fluoride.  Specifications 824,351 and 835,558 are referred to.
Patent GB-300547-A (GB)
IPC: H01J35/08
Filed: 1928-10-24
Abstract: 300,547. Rother, F. Nov. 14, 1927, [Convention date]. Drawings to Specification. R÷ntgen-ray tubes; vacuum tubes.-Electrons are released from a cold or incandescent cathode by bombarding it with alpha, beta, or gamma particles from a radioactive anode freed from gas, the active area of the cathode being smaller than that of the anode. For this purpose the anode of a R÷ntgen-ray tube or rectifier is formed of uranium or thorium or an alloy of these metals with other metals. Curves are given showing the relation between the current and voltage.
Patent GB-1121264-A (GB)
Title: Synthetic latex
IPC: C08F2/22
Filed: 1966-07-08
Abstract: A latex of a rubbery polymer of 50 to 75% by weight of a conjugated diene hydrocarbon and 50 to 25% by weight of an ethylenically unsaturated nitrile is concentrated to a solids content of more than 55% by weight by a process which comprises heat treating a less concentrated latex at a temperature between 40 DEG  and 95 DEG  C. in the presence of a compound of formula <FORM:1121264/C3/1> where R is an organic hydrophobic radical, A is -H or -R(CH2CH2O)mH and B is -H or -(CH2CH2O)pH and n, m and p are each 23 to 455 in an amount of 0.01 to 1.0 part by weight per 100 parts polymer solids until the particles of latex have agglomerated and coalesced and then concentrating to the desired solids content. Preferred copolymers are isoprene-acrylonitrile, butadiene-acrylonitrile, and butadiene - methacylonitrile copolymers.  The preferred agglomerating agent is the reaction product of polyoxyethylene glycol of molecular weight 6000 with the reaction product of 2,2-bis-(4-hydroxyphenyl) propane with 2 moles of epichlorohydrin.  Additional emulsifier may also be added.
Patent GB-282032-A (GB)
Title: Improvements in means for sealing the material inlet and outlet openings in vacuum drying chambers or the like
IPC: D21F5/14
Filed: 1927-11-21
Abstract: 282,032. Minton, O. Dec. 10, 1926, [Convention date]. Addition to 232,647. Drying.-The roll 5 of the sealing rolls of the parent Specification is supported beneath and in air-tight contact with the other rolls in ballbearings, the casings of which are suspended from counterweighted chains 10.
Patent GB-782909-A (GB)
Title: Ethyl esters of substituted thiolbenzoic acids
Inventor: DRIVER GEORGE WILLIAM
IPC: A61K31/265
Filed: 1954-10-29
Abstract: The invention comprises compounds of the formula <FORM:0782909/IV (a)/1> wherein R1 is an acylated hydroxy group or a halogen atom and R2 is hydrogen or a halogen atom.  The compounds are made by reaction of the corresponding carboxylic acid halide with ethyl mercaptan, preferably in an inert solvent or diluent and in the presence of an acid-binding agent such as caustic soda or pyridine.  The products are used in pharmaceutical compositions. Examples describe the preparation of the S-ethyl esters of (1) 2-acetyloxy-thiolbenzoic and (2) 2 : 4-dichloro-thiolbenzoic acids.ALSO:Pharmaceutical compositions suitable for the treatment of tuberculosis comprise compound of the formula <FORM:0782909/VI/1> wherein R1 is an acylated hydroxy group or a halogen atom and R2 is hydrogen or an halogen atom, plus a pharmaceutical excipient.  The compounds may be used for example in pills, tablets, capsules and other pharmaceutical forms. Examples describe compositions suitable for intramuscular administration comprising solutions in arachis oil of (1) ethyl 2-acetyloxy-thiolbenzoate, and (2) ethyl 2 : 4-dichloro-thiolbenzoate.
Patent GB-787336-A (GB)
Title: A method of and apparatus for producing continuously photographic emulsions
IPC: B01F13/10
Filed: 1954-10-29
Abstract: 787,336. Producing photographic emulsions continuously. KRIVANEK, L. Oct. 29, 1954, No. 31342/54. Class 98(2) Photographic silver halide emulsions are produced continuously by feeding the starting materials into a series of lightproof interconnected vessels or into a single .light-proof tubular vessel divided into sections, the vessels or vessel having zones for the reaction, maturation, washing, after-maturation and finishing processes, and stirring the material as it .passes continuously through the various zones. 'As shown, pairs of tanks 1, 2 and 3, 4 are provided respectively with aqueous gelatin solutions of alkali metal halide and silver nitrate, and the solutions are fed from tanks 1 and 3 or 2 and 4 by 'pumps 5 or 6 to the mixing vessel 7 which is provided with a stirrer 9 and heating jacket 8. The mixture is then passed to a physical maturation zone 10, also provided with a heating jacket 11 and stirrer 12. After the required maturing time it passes to a zone 13 having a stirrer 15, where it is washed by dialysis by passing water through jacket 14 which is divided into compartments of over and under pressure and has a semi-permeable inner wall. In the after-maturation zone 16, the emulsion is again heated by jacket 17 and supplied with photochemically active additives from a tank 19 while being stirred by stirrer 18. In the finishing zone 21, the emulsion is stirred by stirrer 22 while additives such, as stabilizers, hardeners and sensitizers are added at 23. The finished emulsion is passed through a filter 24 to the coating apparatus.
Patent GB-365545-A (GB)
Title: Improvements in or connected with means for connecting together tubes for use more particularly in scaffolding
IPC: E04G7/20
Filed: 1930-10-20
Abstract: 365,545. Rod joints. PARKES, S. R., Pretoria Works, New Road, Willenhall, Staffordshire. Oct. 20, 1930, No. 31348. [Class 99 (i).] A rod or tube joint more particularly for tubular scaffold poles comprises a plug d of D section secured in and projecting from the end of each tube b, and helically twisted so that when the projecting ends are inserted in the other tubes, relative rotation of the tubes will cause their ends to abut. In a modification the D section plugs are straight and the tubes are simply pushed together. In another form a spiral plug d has a segment h, Fig. 10, secured at its centre by a collar g, and each end of the plug engages a socket in the end of a tube formed by a spiral D section insert f.
Patent GB-144206-A (GB)
Title: An improved valve construction
IPC: F16K24/06
Filed: 1919-12-15
Abstract: 144,206. MacGregor, P. G. Dec. 15, 1919. Stoppers with inwardly-opening valves. - A vacuum relief valve, more particularly intended for incorporation with a filler-cap for a receptacle, is fitted in the cylindrical recess 7 in the filler-cap 1, Fig. 2. A central passage 8 leads from the recess 7 into a boss 5, which has one or more radial openings 9 communicating with the air. The valve member, Fig. 7, comprises a metal stamping formed with an end portion 11 and with flattened sides 12 and a recess 13 to receive a leather or like disk 14 which forms the valve facing. Another metal stamping, Fig. 8, is formed as a cup which is held in frictional engagement with the walls of the recess 7, the slots 18 ensuring a slight yielding of the walls of the cup. The valve member is made of such a diameter that the prongs 16 fit into the cup member 17. A coiled spring 20 normally presses the valve against its seat, and the valve is opened on reduction of pressure in the receptacle. The flattened side portions of the valve member provide a passage for the air in the receptacle.