baber/WOPTO huggingface dataset:
Patent GB-746238-A (GB)
Title: Improvements in or relating to absorbent pads
IPC: A61F13/15
Filed: 1954-03-03
Abstract: 746,238. Diapers. PAPER PATENTS CO. March 3, 1954 [March 5, 1953], No. 6222/54. Class 141. [Also in Group VI] An absorbent pad is made from an absorbent filler 10, a pervious upper sheet 11 and a moisture-proof backing sheet 12, which has a thermoplastic coating, the edges of this sheet being folded over and heat-sealed to the sheet 11, as at 21. The outer face of the protective sheet has a facing of fibrous material to provide a soft, non-chafing surface. The edges 22, in this construction may be left free to form marginal retaining strips. In an alternative form of pad the sheet 11 lies on the top of the edges of the protective sheet 12, see Fig. 5 (not shown). If desired, the protective sheet may be coextensive with the filler and, in this case, the upper sheet extends around the sides of the filler and is sealed to the backing sheet at the rear, so as to leave the edges of the pad absorbent.
Patent GB-548123-A (GB)
Title: Improvements in electric motor control systems
IPC: B66B1/12
Filed: 1941-05-16
Abstract: 548,123. Controllers. ENGLISH ELECTRIC CO., Ltd., and DOLAN, H. May 16, 1941, No. 6323. Drawings to Specification. [Class 38 (iii)] The controller of a mine winding Ward- Leonard system is operated either by a pilot motor or by a hand lever, similar to the arrangement disclosed in Specification 509,261. According to the present invention a change-over lever is used to clutch selectively the controller to the pilot motor or hand lever and correspondingly to clutch brake means to either a solenoid device or to a hand lever. In order to start the pilot motor, push-buttons can be arranged so that two, at different levels, have to be pressed within a predetermined time interval of each other.
Patent GB-624676-A (GB)
Title: Improvements in air preheaters and like heat exchange apparatus
IPC: F28D9/00
Filed: 1947-03-06
Abstract: 624,676. Plate heat exchangers. HEAT EXCHANGERS, Ltd., and RUDORFF, D. W. A. F. March 6, 1947, No. 6332. [Classes 64(i) and 64(iii)] Relates to apparatus for the indirect exchange of heat between fluids, e.g. between air and gases of the kind having the paths for the respective fluids flowing through the apparatus separated only by corrugated heat conducting sheets 6, 7 juxtaposed to form a stack or pile, with the corrugations on one sheet arranged at an angle, e.g. at right angles to the corrugations on an adjacent sheet. The invention consists in securing adjacent sheets together by spot welding at the points of contact of their corrugations. The spot welding may be effected at all points or alternatively at some only of the points of contact. In the form shown each outer sheet 9 of the pile is flat and is welded to the corrugations of the adjacent, corrugated and juxtaposed sheets 6 or 7. The marginal portion 10 of each corrugated sheet is upturned and the edge is profiled to fit into the corrugations of the adjacent sheet and is welded or otherwise secured thereto. Several units of different sizes may be spaced apart and connected in series such that the crosssectional area of the gas passages is progressively reduced as the gas is cooled while the cross-sectional area of the air passages is progressively increased as the air is heated (see Fig. 7) (not shown). Another arrangement shows units arranged in juxtaposed pairs.
Patent GB-769239-A (GB)
Title: Process for separating tetracycline from chlortetracycline
IPC: C07C233/00
Filed: 1955-03-04
Abstract: Tetracycline is separated from chlortetracycline in aqueous solutions containing the same by adjusting the said solution to a pH of 0.5 to 3.5, extracting the two antibiotics into a water-immiscible organic solvent, separating the resulting extract, treating the said extract with water while adjusting the pH of the aqueous phase to pH 5 to 8 and crystallizing the tetracycline from the result mixture.  This may be brought about by (a) allowing the mixture to stand 8 to 12 hours, or (b) removing part or whole of the solvent in vacuo.  It is preferred to add a water-soluble inorganic salt such as sodium chloride, sodium sulphate, potassium sulphate, potassium chloride, ammonium chloride and ammonium sulphate to the antibiotic solution prior to the extraction with the organic solvent.  Other additions are (a) sodium or potassium ferrocyanide to remove colour-forming substances and (b) ammonium oxalate to prevent precipitation of calcium salts.  The mother liquor remaining after the removal of the tetracycline may be further treated to obtain a further crop of tetracycline crystals.  Chlortetracycline is then recovered from the aqueous residue by known methods.  The initial acidification is by means of inorganic acids such as hydrochloric, sulphuric and phosphoric.  The aqueous solution of antibiotics may be a solution of the free bases, salts or complexes or a filtered fermentation broth. Specified water-immiscible organic solvents are alcohols such as butanol, isobutanol, pentanols and hexanols.  Specification 690,381 is referred to.
Patent GB-162864-A (GB)
Title: Improvements in or relating to machines for calendering and baling hosiery and other fabrics
IPC: D06C29/00
Filed: 1920-03-03
Abstract: 162,864. Dykes, B. J. March 3, 1920. Shaping and stretching tubular goods on internal frames. - A machine for calendering tubular fabrics &c. comprises two adjustable feed carriages I with horizontal and vertical feed-rollers J, L, and an adjustable gauge or expander N with antifriction rollers O. The machine shown comprises three calendering-rollers B on axes C connected by toothed gearing D and driven by fast and loose pulleys F at one side of the machine. At the other side gearing G drives a spindle H with a long keyway K, by means of which it rotates, through belts or chains M and bevel wheels M<1>, the feed rollers J, L, which enable the fabric U to pass over the gauge or expander N. The baling-roller P is pressed against the calendering-roller B by levers P<1> and an adjustable spring Q. If the fabric is to be folded, instead of baled, the fabric passes over the roller R to guide rollers R<1> or a lever S oscillated by a connecting-rod S<1> and crank disc T<1>. Specification 116,404 is referred to.
Patent GB-1479110-A (GB)
Title: Method and device for detecting nitric oxide
IPC: G01N21/31
Filed: 1975-02-14
Abstract: 1479110 Photo-electric gas analysis DEUTSCHE FORSCHUNGS-UND VERSUCHSANSTALT FUR LUFT-UND RAUMFAHRT eV 14 Feb 1975 [15 Feb 1974] 6456/75 Heading G1A Apparatus for detecting nitric oxide in a gas sample comprises: a hollow-cathode lamp for emitting a NO spectrum; means for forming therefrom an unfiltered measuring beam and a reference beam filtered by NO gas at a temperature below the excitation temperature of NO gas in the lamp; an absorption cell for containing a sample and arranged to be irradiated by the measuring beam and the reference beam; and means for determining the ratio between the respective intensities of radiation from the two beams in the spectral region of the NO resonance band after passing through the absorption cell. A hollow cathode lamp 1 through which air is circulated generates NO molecules, causing them to emit radiation over a spectrum corresponding to an occupation temperature of about 1500K. Radiation is directed at a modulating disc 12 rotatable at 10-50 rps and carrying a cylindrical UV- permeable cuvette 17 filled with air or evacuated, and a closely similar cuvette 16 full of NO at room temperature and atmospheric pressure. The radiation is thus periodically transmitted alternately without significant attenuation and with attenuation due to substantial absorbtion of the 2269 line by the NO at room temperature in the cuvette 16. Modulated radiation, reflected by a concave mirror 2, passes through a sample cell 3 containing a flowing or stationary gas-sample, and is focused by a lens 6 on a monochromator 7 arranged to pass the 2269  line with a bandwidth of 20. A photo-multiplier 8 followed by an amplifier 9 provides signals representing radiation intensity to a decoder 11, driven by a photo-cell 21 in co-operation with an illuminated semicircular slit 18 in the disc 12, for synchronously routing measuring and reference signals along respective lines 23, 24 to memories 26, 28. An electrical divider 27 supplies a signal, representing the ratio between the measurement and reference signals, to an indicator 31 as a measure of the NO concentration in the sample gas in the cell 3.
Patent GB-622058-A (GB)
Title: Improvements relating to pipe joints
IPC: B28B21/56
Filed: 1947-03-07
Abstract: 622,058. Joints for concrete pipes. ELLIS & SONS, Ltd., J. and FROLICH, A. March 7, 1947, No. 6485. [Class 99(i)] A spigot and socket joint for the adjacent ends of concrete pipes has a resilient packing ring with an expanded root b moulded into the inner wall of the socket and with projecting leg members c, d, which are normally splayed apart, Fig. 2, but are adapted to be folded together by the spigot, Fig. 4, so as to seal the joint. During formation of the socket, the projecting leg c is distorted to lie axially in contact with the former used in the mould, i.e. in a corresponding but opposite position to the leg d. Specification 583,459 is referred to.
Patent GB-535539-A (GB)
Title: Improvements in or relating to starting cranks for internal combustion engines
IPC: F02N1/02
Filed: 1940-04-10
Abstract: 535,539. Turning -gear. SCHWEIZERISCHE LOKOMOTIV-UND MASCHINENFABRIK. April 10, 1940, No. 6495. Convention date, April 26, 1939. [Class 7 (v)] The hub 5 of a starting-crank 4 engages a conical seat 3 on the end of the engine crankshaft 1 and is provided with a spring-pressed stud 9 for engagement with a helical cam groove 6 merging at the end 7 with the conical surface 3 and being deepest at the other end 8. Play is allowed between the hub 5 and the conical seat when the stud bears against the end 8 of the groove. The starting-crank is disengaged by the interaction of the stud and groove when the engine starts.
Patent GB-410294-A (GB)
Title: Improvements in or relating to methods of and apparatus for dispensing gases in liquefied or gaseous state
IPC: F17C9/02
Filed: 1933-03-03
Abstract: 410,294. Revaporizing liquefied gases. LINDE AIR PRODUCTS CO., 30, East 42nd Street, New York, U.S.A.-(Assignees of Dana, L. J. ; 155, Chandler Street, Buffalo, New York, U.S.A.) March 3, 1933, No. 6512. Convention date, May 4, 1932. [Class 8 (ii).] Container for liquefied gas comprises an inner vessel 11 surrounded by insulating material in an envelope 12, which also contains an auxiliary vessel 14 communicating at its upper and lower ends with the upper and lower portions respectively of the vessel 11. The vessel 14 thus contains a column 17 of liquefied gas, and is provided with a conduct 18 for the passage of a heating agent. When gas is being supplied from the container, heating fluid is passed through the conduit 18 whereby the liquefied gas in vessel 14 is vaporized and passes into the vessel 11 above the liquefied gas therein, so giving a desired pressure greater than the pipe line pressure. The container is provided with a filling conduit 23, a liquefied gas withdrawal conduit 21 and a gas phase withdrawal conduit 26, provided with a safety valve 29 ; gas under pressure is supplied to a gas receiver 34 for storage purposes, or through conduit 31 to consuming apparatus.
Patent GB-825457-A (GB)
Title: Improvements in corrosion resistant coatings
Inventor: AVONS CHARLES HOWARD JAMES
IPC: B05D7/16
Filed: 1956-03-01
Abstract: Metal or concrete surfaces are coated firstly with a mixture of hydraulic cement and a latex or emulsion of a film-forming natural or synthetic thermoplastic organic material with or without a finely divided aggregate, then with a continuous adherent layer of a film-forming thermoplastic material which is compatible with the film-forming material in the first coating, and finally with a layer of polyvinyl chloride plasticized with an organic polysulphide rubber.  The final layer may be in the form of a so-called reverse-phase paint.  The thermoplastic material may be polyvinyl chloride, natural rubber, synthetic rubber such as butadiene-acrylonitrile copolymer or polysulphide rubber, polyvinyl acetate or mixtures thereof.  A preferred composition uses polyvinyl acetate emulsion, "Ciment Fondu" (Registered Trade Mark) and sand for the first coating, and polyvinyl acetate containing up to 20% of a plasticizer for the second.  The first layer may be applied as a trowelling composition, and the subsequent layers by brushing or spraying.  The method may be used for repairing corroded steel tanks by applying the coatings to the corroded parts; or for coating the interiors of concrete storage tanks.ALSO:Metal or concrete surfaces are coated firstly with a mixture of hydraulic cement and a latex or emulsion of a film-forming natural or synthetic thermoplastic organic material with with or without a finely divided aggregate, then with a continuous adherent layer of a film-forming thermoplastic material which is compatible with the film-forming material in the first coating, and finally with a layer of polyvinyl chloride plasticized with an organic polysulphide rubber.  The thermoplastic substance may be polyvinyl chloride, natural rubber, synthetic rubber such as butadieneacrylonitrile copolymer or polysulphide rubber, polyvinyl acetate or mixtures thereof.  A preferred composition uses polyvinyl acetate emulsion, "Ciment Fondu" (Registered Trade Mark) and sand for the first coating, and polyvinyl acetate containing up to 20% of a plasticizer for the second.
Patent GB-599256-A (GB)
Title: Improvements in or relating to wave forming thermionic valve circuit arrangements
IPC: H03K3/10
Filed: 1944-04-06
Abstract: 599,256. Pulse-generating circuits. SPERRY GYROSCOPE CO., Inc. April 6, 1944, No. 6519. Convention date, Dec. 30, 1942. [Class 40 (v)] In a resistance-capacity coupled multivibrator, a cathode follower couples one valve to the other, a tuned-circuit being connected in the cathode lead. In the free-running circuit shown, valves 11, 13 are normally conducting, valve 12 being held non-conducting due to the large negative potential acquired earlier in the cycle of operation. Condenser 28 discharges over resistance 29 until valve 12 commences to pass anode current, the resulting fall in anode potential driving the grid of cathode follower 13 beyond cut-off. The sudden decrease in cathode current causes the tuned-circuit 33 to ring, the cathode potential passing through a negative half-cycle, cutting off valve 11, which in turn causes valve 12 to pass grid current and condenser 28 to recharge. The succeeding positive halfcycle is suppressed since valve 11 is rendered conducting, cutting off valve 12, which causes valve 13 to conduct again. The short negative pulse from the anode of valve 12 may be differentiated to produce a positive pulse delayed by a half-period of the circuit 33 with respect to the pulse from the anode of valve 13. The Specification as open to inspection under Sect. 91 also describes a dircuit, Fig. 4 (Cancelled), for producing a pulse to initiate a timebase in the generator 198 for a cathode -ray oscilloscope 193 and a delayed pulse for triggering a phenomenon to be observed and developed in a generator 197, together with marker pulses fed from valve 187. Valve 112 of the multivibrator pair 112, 113 feeds a negative-going pulse to cut off valve 141, the choke 138 giving a large positive pulse which is fed through the cathode follower 154 to the time-base generator 198, the oscillation of choke 138 being damped out after the first half-cycle by diode 153. The negative pulse from valve 112 is also fed through delay line 137 to amplifier 142 and cathode follower 155 to trigger off the apparatus 197 producing the phenomenon to be observed. This delayed pulse also cuts off valve 162, causing tuned circuit 161 to ring, the decrement being decreased by the crossconnected triode pair 167, the oscillations passing to a clipper cathode follower 187 feeding marking pulses to the oscillograph 193. This subject-matter does not appear in the Specification as accepted.
Patent GB-701595-A (GB)
Title: Improvements in and relating to metallic packings for sliding rods
IPC: F16J15/28
Filed: 1951-03-20
Abstract: 701,595. Stuffing-box packing. SOMMER, H. March 20, 1951 [March 23, 1950], No. 6651/51. Class 122 (5) Stuffing-box packing for a sliding rod 12 comprises a metallic sleeve 2 formed with internal V-shaped grooves 3 opening towards the rods and external V-shaped grooves 4 opening toward the stuffing-box wall, the grooves being separated by walls 5 which are oblique relative to the axis of the sleeve. The sleeve, which is preferably made of non-ferrous metal, is axially split to facilitate assembly on, or removal from, the rod 2. The stuffing-box may be mounted in its bearing 6 in cantilever fashion by forming it of two concentrically spaced annular parts 13a and 13b joined at their inner ends at 14, the outer end of the outer part 13b being secured to the bearing by a flange 15.
Patent GB-339565-A (GB)
Title: Improvements in fire escapes and the like
IPC: A62B1/06
Filed: 1930-02-28
Abstract: 339,565. Kolesza, J. Feb. 28, 1930. Window appliances. -In appliances consisting of a safety belt e which is provided with an eye f, constructed for example as a carbine hook or swivel, through which pass ropes c, d pulled apart at their lower ends by helpers, the upper ends of the ropes are secured to rings b fitted near the ends of a transverse strut a clamped in the window frame.
Patent GB-589171-A (GB)
Title: Improvements in or relating to chiming or striking mechanisms for house clocks
IPC: G04B21/06
Filed: 1945-03-16
Abstract: 589,171. Clocks. ELLIOTT, H. W. March 16, 1945, No. 6671. [Class 139] A mechanism for automatically silencing or switching off the chiming or striking action of a house clock during part or parts of each 24- hour period. As shown in Fig. 1, a lever e usually called the lifting piece controls by means of its inturned end projecting through a slot in plate f the release of the striking and chiming action in known manner. A wheel a rotating once every two hours moves, by means of a pin, a star wheel b having twelve teeth. A cam c carried by a wheel b and thus rotating once in 24 hours actuates a bell-crank lever d which cooperates with the lever e to keep said lever e in the raised position during the period that a pin on the bell-crank lever d rests on the high portion of the cam c. The outline of cam c is such that this " silencing " takes place for the desired period of the day.
Patent GB-589636-A (GB)
Title: Process of compounding natural and synthetic rubber
IPC: C08K3/36
Filed: 1945-03-16
Abstract: Silica in the form of finely divided amorphous spherical particles is obtained by the oxidation of silicon or silicon monoxide in the vapour phase.  The silica is preferably made as a bye-product in the manufacture of ferrosilicon by the reaction of excess silica, carbon and iron in a furnace under which conditions silicon is volatilised and oxidised.ALSO:Silica obtained by the oxidation of silicon or silicon monoxide in the vapour phase is used as a compounding ingredient in natural and synthetic rubber compositions.  The silica is preferably obtained in the form of finely divided amorphous spherical porticles as a bye-product in the manufacture of ferrosilicon.  In an example, 100 parts of a butadiene-styrene copolymer, 5 parts processing oil, 5 parts of zinc oxide, 2 parts sulphur, 1.5 parts of mercaptobenzthiazole, 50 parts of silica prepared according to the above method are calendered and cured at 280 DEG F.
Patent GB-102107-A (GB)
Title: Improvements in Telescopic Mine Props or like Columns.
IPC: E21D15/18
Filed: 1916-05-11
Abstract: 102,107. Wrightson, W. J., Ringquist, J. M., and Head Wrightson & Co. May 11, 1916. Mine props.-In a telescopic m i n e prop or like column containing sand, &c., the base c of the upper part a is made flat and perforated, the upper end is provided with a perforated cap e or plug g, and the base of the lower part is provided with an aperture i, which can be closed or not as desired, for the escape of sand.
Patent GB-1223543-A (GB)
Title: Improvements to field-effect transistor circuits
IPC: H01L29/78
Filed: 1969-02-07
Abstract: 1,223,543. Semi-conductor devices. THOMSON-CSF. 7 Feb., 1969 [9 Feb., 1968], No.' 6882/69. Heading HlK. An integrated circuit comprises two pairs of field-effect transistors A-D, B-C, preferably of the metal-oxide-silicon type, in which the sources, drains and gates of the two transistors of each pair are respectively interconnected (i.e. 1-10, 2-11, 3-12, 4-7, 5-8, 6-9) and in which the locations of the two transistors of each pair are symmetrically situated about a point M which is the same for both pairs. The two elements of each pair may be derived from each other by translation alone as shown, or by translation plus rotation through 180 degrees. In one embodiment all four transistors have a common source region.
Patent GB-209986-A (GB)
Title: Improvements in or relating to electric condensers
IPC: H01G5/06
Filed: 1923-03-10
Abstract: 209,986. Stevens & Co. (1914), Ltd., A. J., and Stevens, H. March 10, 1923. Condensers.-The stationary plates 3 and movable plates 4 of a variable condenser are provided with triangular projections 3<b>, 4<a> which are the first portions of the plates to overlap during the movement from the position of minimum capacity. This construction permits of a very gradual increase of capacity during the initial portion of the movement, and also gives a low value for the minimum capacity. The movable plates are assembled on a spindle 5, which is mounted in bushes 9 screwed into tapped holes 7 in the endplates 1, as described in Specification 210,030. The plates 1 are slotted from their edges to the holes 7, so that the spindle, with the movable plates in position, can be passed into the holes before screwing in the bushes.
Patent GB-1192421-A (GB)
Title: An Improved Device for Sensing Bed Wetting
Inventor: COHEN ELLIS BERNARD
IPC: A61F5/48
Filed: 1967-02-14
Abstract: 1,192,421. Signalling enuresis. E. B. COHEN. 13 Feb., 1968 [14 Feb., 1967], No. 7013/67. Heading A5R..  Apparatus 'for sensing bed wetting comprises a humidity sensor with a pair 'of metal foil electrodes 14, 16 on a flexible backing of insulating material which may be placed below the 'sheet in a cot. Moisture in the sheet bridges the electrodes and) the base of a transistor 19 becomes negatively charged and the transistor conducts thus energizing an audio oscillator 22 to sound an alarm.